diff --git a/pdlua.c b/pdlua.c
index 562340d..0177864 100644
--- a/pdlua.c
+++ b/pdlua.c
@@ -788,7 +788,7 @@ static void pdlua_motion(t_gobj *z, t_floatarg dx, t_floatarg dy,
t_floatarg up)
#endif
{
-#if !PLUGDATA
+#ifndef PLUGDATA
#ifndef PURR_DATA
if (!up)
#endif
@@ -806,7 +806,7 @@ static void pdlua_motion(t_gobj *z, t_floatarg dx, t_floatarg dy,
static int pdlua_click(t_gobj *z, t_glist *gl, int xpos, int ypos, int shift, int alt, int dbl, int doit){
t_pdlua *x = (t_pdlua *)z;
-#if !PLUGDATA
+#ifndef PLUGDATA
if(x->has_gui)
{
int zoom = glist_getzoom(gl);
@@ -842,13 +842,12 @@ static int pdlua_click(t_gobj *z, t_glist *gl, int xpos, int ypos, int shift, in
static void pdlua_displace(t_gobj *z, t_glist *glist, int dx, int dy){
t_pdlua *x = (t_pdlua *)z;
-
if(x->has_gui)
{
x->pd.te_xpix += dx, x->pd.te_ypix += dy;
dx *= glist_getzoom(glist), dy *= glist_getzoom(glist);
-#if !PLUGDATA
+#ifndef PLUGDATA
gfx_displace((t_pdlua*)z, glist, dx, dy);
#endif
}
@@ -1051,7 +1050,7 @@ static void pdlua_menu_open(t_pdlua *o)
if (nw_gui_vmess)
nw_gui_vmess("open_textfile", "s", pathname);
else
- sys_vgui("::pd_menucommands::menu_openfile {%s}\n", pathname);
+ pdgui_vmess("::pd_menucommands::menu_openfile", "s", pathname);
#endif
} else {
lua_pop(__L(), 2); /* pop name, global "pd"*/
@@ -1449,7 +1448,7 @@ static int pdlua_object_new(lua_State *L)
o->gfx.width = 80;
o->gfx.height = 80;
-#if !PLUGDATA
+#ifndef PLUGDATA
// Init graphics state for pd
o->gfx.mouse_drag_x = 0;
o->gfx.mouse_drag_y = 0;
diff --git a/pdlua.h b/pdlua.h
index 0b2f24a..789b4e4 100644
--- a/pdlua.h
+++ b/pdlua.h
@@ -31,7 +31,7 @@ typedef struct _pdlua_gfx
int width, height;
void *object;
-#if !PLUGDATA
+#ifndef PLUGDATA
char object_tag[128]; // Tcl/tk tag that is attached to all drawings
char order_tag[64]; // Tag for invisible line, used to preserve correct object ordering
char current_item_tag[64]; // Tcl/tk tag that is only attached to the current drawing in progress
@@ -45,7 +45,10 @@ typedef struct _pdlua_gfx
// Variables to keep track of mouse button state and drag position
int mouse_drag_x, mouse_drag_y, mouse_down;
int first_draw;
-
+#ifndef PURR_DATA
+ uint64_t* images;
+ int num_images;
+#endif
#else
int current_layer;
void(*plugdata_draw_callback)(void*, int, t_symbol*, int, t_atom*); // Callback to perform drawing in plugdata
diff --git a/pdlua/hello-gui.pd_lua b/pdlua/hello-gui.pd_lua
index 6bfdbe1..bc560eb 100644
--- a/pdlua/hello-gui.pd_lua
+++ b/pdlua/hello-gui.pd_lua
@@ -24,7 +24,7 @@ function hello:initialize(sel, atoms)
self.mouse_down_pos = {0, 0}
self.rect_down_pos = {0, 0}
- self:set_size(630, 230)
+ self:set_size(720, 230)
return true
end
@@ -58,7 +58,7 @@ function hello:mouse_drag(x, y)
if dragging_rect == true then
self.draggable_rect_x = self.rect_down_pos[0] + (x - self.mouse_down_pos[0])
self.draggable_rect_y = self.rect_down_pos[1] + (y - self.mouse_down_pos[1])
- self.draggable_rect_x = math.clamp(self.draggable_rect_x, 0, 620 - self.draggable_rect_size)
+ self.draggable_rect_x = math.clamp(self.draggable_rect_x, 0, 710 - self.draggable_rect_size)
self.draggable_rect_y = math.clamp(self.draggable_rect_y, 0, 230 - self.draggable_rect_size)
self:repaint(3)
end
@@ -153,6 +153,7 @@ function hello:paint(g)
g:draw_text("Bezier Paths", 360, 190, 120, 12)
g:draw_text("Animation", 460, 190, 120, 12)
g:draw_text(" Mouse\nInteraction", 540, 190, 120, 12)
+ g:draw_text(" SVG\nRendering", 640, 190, 120, 12)
end
function hello:paint_layer_2(g)
@@ -168,6 +169,20 @@ function hello:paint_layer_3(g)
g:draw_text("Drag\n me!", self.draggable_rect_x + 8, self.draggable_rect_y + 10, self.draggable_rect_size, 12)
end
+function hello:paint_layer_4(g)
+ -- Draggable rectangle
+ local svg_demo_1 = [[
+
+ ]]
+
+ local svg_demo_2 = [[
+
+ ]]
+
+ g:draw_svg(svg_demo_1, 650, 40)
+ g:draw_svg(svg_demo_2, 650, 120)
+end
+
function hello:tick()
self.circle_y = self.circle_y + self.animation_speed
if self.circle_y > 160 + self.circle_radius then
diff --git a/pdlua_gfx.h b/pdlua_gfx.h
index a3f32ab..a58a10d 100644
--- a/pdlua_gfx.h
+++ b/pdlua_gfx.h
@@ -21,6 +21,15 @@
*
*/
+#if !defined(PLUGDATA) && !defined(PURR_DATA)
+#define NANOSVG_IMPLEMENTATION
+#include "svg/nanosvg.h"
+#define NANOSVGRAST_IMPLEMENTATION
+#include "svg/nanosvgrast.h"
+#define STB_IMAGE_WRITE_IMPLEMENTATION
+#include "svg/stb_image_write.h"
+#endif
+
#ifdef PURR_DATA
// Port of the vanilla gfx interface to Purr Data. There are some differences
@@ -64,6 +73,7 @@ static int stroke_rounded_rect(lua_State* L);
static int draw_line(lua_State* L);
static int draw_text(lua_State* L);
+static int draw_svg(lua_State* L);
static int start_path(lua_State* L);
static int line_to(lua_State* L);
@@ -84,19 +94,28 @@ static int free_path(lua_State* L);
static void pdlua_gfx_clear(t_pdlua *obj, int layer, int removed); // only for pd-vanilla, to delete all tcl/tk items
void pdlua_gfx_free(t_pdlua_gfx *gfx) {
-#if !PLUGDATA
+#ifndef PLUGDATA
for(int i = 0; i < gfx->num_layers; i++)
{
freebytes(gfx->layer_tags[i], 64);
}
freebytes(gfx->layer_tags, gfx->num_layers);
if(gfx->transforms) freebytes(gfx->transforms, gfx->num_transforms * sizeof(gfx_transform));
+#ifndef PURR_DATA
+ for(int i = 0; i < gfx->num_images; i++)
+ {
+ char image_name[64];
+ snprintf(image_name, 64, ".x%llupix%llu", (unsigned long long)gfx, gfx->images[i]);
+ pdgui_vmess(0, "rrs", "image", "delete", image_name);
+ }
+ if(gfx->num_images) freebytes(gfx->images, gfx->num_images * sizeof(uint64_t));
+#endif
#endif
}
// Trigger repaint callback in lua script
void pdlua_gfx_repaint(t_pdlua *o, int firsttime) {
-#if !PLUGDATA
+#ifndef PLUGDATA
o->gfx.first_draw = firsttime;
#endif
lua_getglobal(__L(), "pd");
@@ -110,7 +129,7 @@ void pdlua_gfx_repaint(t_pdlua *o, int firsttime) {
}
lua_pop(__L(), 1); /* pop the global "pd" */
-#if !PLUGDATA
+#ifndef PLUGDATA
o->gfx.first_draw = 0;
#endif
}
@@ -199,6 +218,7 @@ static const luaL_Reg gfx_methods[] = {
{"stroke_rounded_rect", stroke_rounded_rect},
{"draw_line", draw_line},
{"draw_text", draw_text},
+ {"draw_svg", draw_svg},
{"stroke_path", stroke_path},
{"fill_path", fill_path},
{"fill_all", fill_all},
@@ -296,7 +316,7 @@ static int start_paint(lua_State* L) {
}
t_pdlua *obj = (t_pdlua*)lua_touserdata(L, 1);
int layer = luaL_checknumber(L, 2);
-
+
lua_pushlightuserdata(L, &obj->gfx);
luaL_setmetatable(L, "GraphicsContext");
@@ -445,6 +465,20 @@ static int draw_text(lua_State* L) {
return 0;
}
+static int draw_svg(lua_State* L) {
+ t_pdlua_gfx *gfx = pop_graphics_context(L);
+ t_pdlua *obj = gfx->object;
+
+ t_canvas *cnv = glist_getcanvas(obj->canvas);
+
+ t_atom args[3];
+ SETSYMBOL(args, gensym(luaL_checkstring(L, 1)));
+ SETFLOAT(args + 1, luaL_checknumber(L, 2)); // x
+ SETFLOAT(args + 2, luaL_checknumber(L, 3)); // y
+
+ plugdata_draw(gfx->object, gfx->current_layer, gensym("lua_draw_svg"), 3, args);
+}
+
static int stroke_path(lua_State* L) {
t_pdlua_gfx *gfx = pop_graphics_context(L);
t_pdlua *obj = gfx->object;
@@ -493,7 +527,6 @@ static int fill_path(lua_State* L) {
return 0;
}
-
static int translate(lua_State* L) {
t_pdlua_gfx *gfx = pop_graphics_context(L);
t_pdlua *obj = gfx->object;
@@ -577,6 +610,17 @@ static void transform_point(t_pdlua_gfx *gfx, int* x, int* y) {
}
}
+static void transform_size_float(t_pdlua_gfx *gfx, float* w, float* h) {
+ for(int i = gfx->num_transforms - 1; i >= 0; i--)
+ {
+ if(gfx->transforms[i].type == SCALE)
+ {
+ *w *= gfx->transforms[i].x;
+ *h *= gfx->transforms[i].y;
+ }
+ }
+}
+
static void transform_point_float(t_pdlua_gfx *gfx, float* x, float* y) {
for(int i = gfx->num_transforms - 1; i >= 0; i--)
{
@@ -756,7 +800,9 @@ static void get_bounds_args(lua_State* L, t_pdlua *obj, int* x1, int* y1, int* x
static void gfx_displace(t_pdlua *x, t_glist *glist, int dx, int dy)
{
#ifndef PURR_DATA
- sys_vgui(".x%lx.c move .x%lx %d %d\n", glist_getcanvas(x->canvas), (long)x, dx, dy);
+ char obj_name[32];
+ snprintf(obj_name, 32 ,".x%lx", (long)x);
+ pdgui_vmess(0, "crs ii", glist_getcanvas(x->canvas), "move", obj_name, dx, dy);
#else
gui_vmess("gui_text_displace", "xsii", glist_getcanvas(x->canvas), x->gfx.object_tag, dx, dy);
#endif
@@ -779,7 +825,6 @@ static int gfx_initialize(t_pdlua *obj)
{
t_pdlua_gfx *gfx = &obj->gfx;
- t_object *ob = (t_object*)obj;
#ifndef PURR_DATA
snprintf(gfx->object_tag, 128, ".x%lx", (long)obj);
gfx->object_tag[127] = '\0';
@@ -984,7 +1029,7 @@ static int end_paint(lua_State* L) {
static int set_color(lua_State* L) {
t_pdlua_gfx *gfx = pop_graphics_context(L);
- int r, g, b, a;
+ int r, g, b;
if (lua_gettop(L) == 1) { // Single argument: parse as color ID instead of RGB
int color_id = luaL_checknumber(L, 1);
if(color_id != 1)
@@ -1011,7 +1056,7 @@ static int set_color(lua_State* L) {
gfx->current_color[7] = '\0';
#else
// ... but it is in Purr Data (nw.js gui)
- a = 255;
+ int a = 255;
if (lua_gettop(L) >= 4) {
a = luaL_checknumber(L, 4)*255;
}
@@ -1329,6 +1374,176 @@ static int draw_text(lua_State* L) {
return 0;
}
+// Create single hash of svg text and render scale
+static uint64_t pdlua_image_hash(unsigned char *str, float scale)
+{
+ uint64_t hash = 5381;
+ int c;
+
+ while ((c = *str++))
+ hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
+
+ union { float f; uint32_t i; } u;
+ u.f = scale;
+ return hash ^ (u.i * 0x9E3779B9);
+}
+
+static char *pdlua_base64_encode(const unsigned char *data,
+ size_t input_length) {
+
+ static char encoding_table[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+ 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+ 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+ 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+ 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
+ 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
+ 'w', 'x', 'y', 'z', '0', '1', '2', '3',
+ '4', '5', '6', '7', '8', '9', '+', '/'};
+
+ static int mod_table[] = {0, 2, 1};
+
+ size_t output_length = 4 * ((input_length + 2) / 3);
+
+ char *encoded_data = malloc(output_length+1);
+ if (encoded_data == NULL) return NULL;
+
+ for (size_t i = 0, j = 0; i < input_length;) {
+
+ uint32_t octet_a = i < input_length ? (unsigned char)data[i++] : 0;
+ uint32_t octet_b = i < input_length ? (unsigned char)data[i++] : 0;
+ uint32_t octet_c = i < input_length ? (unsigned char)data[i++] : 0;
+
+ uint32_t triple = (octet_a << 0x10) + (octet_b << 0x08) + octet_c;
+
+ encoded_data[j++] = encoding_table[(triple >> 3 * 6) & 0x3F];
+ encoded_data[j++] = encoding_table[(triple >> 2 * 6) & 0x3F];
+ encoded_data[j++] = encoding_table[(triple >> 1 * 6) & 0x3F];
+ encoded_data[j++] = encoding_table[(triple >> 0 * 6) & 0x3F];
+ }
+
+ for (int i = 0; i < mod_table[input_length % 3]; i++)
+ encoded_data[output_length - 1 - i] = '=';
+
+ encoded_data[output_length] = '\0';
+ return encoded_data;
+}
+
+static int draw_svg(lua_State* L) {
+ t_pdlua_gfx *gfx = pop_graphics_context(L);
+ t_pdlua *obj = gfx->object;
+
+ t_canvas *cnv = glist_getcanvas(obj->canvas);
+ int canvas_zoom = glist_getzoom(cnv);
+
+ // We can only apply scaling with an equal aspect ratio, so we only use the first scale coordinate
+ float scale_x = canvas_zoom, scale_y = canvas_zoom;
+ transform_size_float(gfx, &scale_x, &scale_y);
+ float scale = (scale_x + scale_y) * 0.5f;
+
+ char* svg_text = strdup(luaL_checkstring(L, 1));
+ uint64_t svg_hash = pdlua_image_hash((unsigned char*)svg_text, scale);
+
+ int x = luaL_checknumber(L, 2);
+ int y = luaL_checknumber(L, 3);
+
+ transform_point(gfx, &x, &y);
+
+
+ x += text_xpix((t_object*)obj, obj->canvas) / canvas_zoom;
+ y += text_ypix((t_object*)obj, obj->canvas) / canvas_zoom;
+
+ x *= canvas_zoom;
+ y *= canvas_zoom;
+
+ const char* tags[] = { gfx->object_tag, register_drawing(gfx), gfx->current_layer_tag };
+
+#ifndef PURR_DATA
+ // See if we already rendered the same svg text at the same size, if so, reuse that image
+ for(int i = 0; i < gfx->num_images; i++)
+ {
+ if(gfx->images[i] == svg_hash)
+ {
+ char image_name[64];
+ snprintf(image_name, 64, ".x%llupix%llu", (unsigned long long)gfx, svg_hash);
+ pdgui_vmess(0, "crr ii rs rr rS", cnv, "create", "image", x, y, "-image", image_name, "-anchor", "nw", "-tags", 3, tags);
+ return 0;
+ }
+ }
+
+ // First parse svg text with nanosvg
+ struct NSVGimage* image = nsvgParse(svg_text, "px", 96);
+ if (!image) {
+ pd_error(0, "[pdlua]: Failed to parse SVG data.");
+ return 0;
+ }
+
+ // Then rasterize to a bitmap image
+ struct NSVGrasterizer* rast = nsvgCreateRasterizer();
+ if (!rast) {
+ pd_error(0, "[pdlua]: Failed to create rasterizer.");
+ return 0;
+ }
+
+ const int channels = 4;
+ // Apply scale, limit size to object size
+ // This is not perfect clipping, but it at least prevents accidental large images from freezing pd
+ int w = (int)fmax(image->width * scale, gfx->width * canvas_zoom);
+ int h = (int)fmax(image->height* scale, gfx->height * canvas_zoom);
+ int image_size = w * h * channels;
+
+ unsigned char* bitmap_data = getbytes(image_size);
+ if (!bitmap_data) {
+ pd_error(0, "[pdlua]: Failed to allocate memory for bitmap.");
+ return 0;
+ }
+
+ nsvgRasterize(rast, image, 0, 0, scale, bitmap_data, w, h, w * channels);
+
+ // Convert bitmap data to png
+ int png_size;
+ unsigned char* png_buf = stbi_write_png_to_mem(bitmap_data, w * channels, w, h, channels, &png_size);
+ if (!png_buf || png_size <= 0) {
+ pd_error(0, "[pdlua]: Failed to encode PNG image.");
+ return 0;
+ }
+
+ // Encode PNG data to Base64
+ char* encoded_png = pdlua_base64_encode((unsigned char*)png_buf, png_size);
+ free(png_buf);
+
+ if (!encoded_png) {
+ pd_error(0, "[pdlua]: Failed to encode PNG to Base64.");
+ return 0;
+ }
+
+ // Write entry to image hash table
+ if(gfx->num_images == 0)
+ {
+ gfx->images = getbytes(sizeof(uint64_t));
+ }
+ else {
+ gfx->images = resizebytes(gfx->images, gfx->num_images*sizeof(uint64_t), (gfx->num_images+1) * sizeof(uint64_t));
+ }
+
+ gfx->images[gfx->num_images] = svg_hash;
+ gfx->num_images++;
+
+ char image_name[64];
+ snprintf(image_name, 64, ".x%llupix%llu", (unsigned long long)gfx, svg_hash);
+ pdgui_vmess(0, "rrr s rs", "image", "create", "photo", image_name, "-data", encoded_png);
+ pdgui_vmess(0, "crr ii rs rr rS", cnv, "create", "image", x, y, "-image", image_name, "-anchor", "nw", "-tags", 3, tags);
+
+ // Cleanup
+ free(encoded_png);
+ free(svg_text);
+ freebytes(bitmap_data, image_size);
+#else // PURR_DATA
+ // TODO: implement for purr-data, probably just send the svg text over?
+#endif
+ return 0;
+}
+
+
static int stroke_path(lua_State* L) {
t_pdlua_gfx *gfx = pop_graphics_context(L);
t_pdlua *obj = gfx->object;
@@ -1351,13 +1566,16 @@ static int stroke_path(lua_State* L) {
#ifndef PURR_DATA
pdgui_vmess(0, "crr iiii ri rs rS", cnv, "create", "line", 0, 0, 0, 0, "-width", stroke_width, "-fill", gfx->current_color, "-tags", 3, tags);
- sys_vgui(".x%lx.c coords %s", cnv, tags[1]);
+ t_float* transformed_coordinates = getbytes(path->num_path_segments * 2 * sizeof(t_float));
for (int i = 0; i < path->num_path_segments; i++) {
- float x = path->path_segments[i * 2], y = path->path_segments[i * 2 + 1];
+ float x = path->path_segments[i * 2], y = path->path_segments[i * 2 + 1];
transform_point_float(gfx, &x, &y);
- sys_vgui(" %f %f", (x * canvas_zoom) + obj_x, (y * canvas_zoom) + obj_y);
+ transformed_coordinates[i * 2] = (x * canvas_zoom) + obj_x;
+ transformed_coordinates[i * 2 + 1] = (y * canvas_zoom) + obj_y;
}
- sys_vgui("\n");
+ pdgui_vmess(0, "crs F", cnv, "coords", tags[1], path->num_path_segments*2, transformed_coordinates);
+ freebytes(transformed_coordinates, path->num_path_segments * 2 * sizeof(t_float));
+
#else // PURR_DATA
gui_start_vmess("gui_luagfx_stroke_path", "xsssi", cnv, tags[2], tags[1],
gfx->current_color, stroke_width);
@@ -1397,13 +1615,15 @@ static int fill_path(lua_State* L) {
#ifndef PURR_DATA
pdgui_vmess(0, "crr iiii ri rs rS", cnv, "create", "polygon", 0, 0, 0, 0, "-width", 0, "-fill", gfx->current_color, "-tags", 3, tags);
- sys_vgui(".x%lx.c coords %s", cnv, tags[1]);
+ t_float* transformed_coordinates = getbytes(path->num_path_segments * 2 * sizeof(t_float));
for (int i = 0; i < path->num_path_segments; i++) {
- float x = path->path_segments[i * 2], y = path->path_segments[i * 2 + 1];
+ float x = path->path_segments[i * 2], y = path->path_segments[i * 2 + 1];
transform_point_float(gfx, &x, &y);
- sys_vgui(" %f %f", (x * canvas_zoom) + obj_x, (y * canvas_zoom) + obj_y);
+ transformed_coordinates[i * 2] = (x * canvas_zoom) + obj_x;
+ transformed_coordinates[i * 2 + 1] = (y * canvas_zoom) + obj_y;
}
- sys_vgui("\n");
+ pdgui_vmess(0, "crs F", cnv, "coords", tags[1], path->num_path_segments*2, transformed_coordinates);
+ freebytes(transformed_coordinates, path->num_path_segments * 2 * sizeof(t_float));
#else // PURR_DATA
gui_start_vmess("gui_luagfx_fill_path", "xsssi", cnv, tags[2], tags[1],
gfx->current_color, 0);
diff --git a/svg/nanosvg.h b/svg/nanosvg.h
new file mode 100644
index 0000000..76e0dbe
--- /dev/null
+++ b/svg/nanosvg.h
@@ -0,0 +1,3098 @@
+/*
+ * Copyright (c) 2013-14 Mikko Mononen memon@inside.org
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ * The SVG parser is based on Anti-Grain Geometry 2.4 SVG example
+ * Copyright (C) 2002-2004 Maxim Shemanarev (McSeem) (http://www.antigrain.com/)
+ *
+ * Arc calculation code based on canvg (https://code.google.com/p/canvg/)
+ *
+ * Bounding box calculation based on http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
+ *
+ */
+
+#ifndef NANOSVG_H
+#define NANOSVG_H
+
+#ifndef NANOSVG_CPLUSPLUS
+#ifdef __cplusplus
+extern "C" {
+#endif
+#endif
+
+// NanoSVG is a simple stupid single-header-file SVG parse. The output of the parser is a list of cubic bezier shapes.
+//
+// The library suits well for anything from rendering scalable icons in your editor application to prototyping a game.
+//
+// NanoSVG supports a wide range of SVG features, but something may be missing, feel free to create a pull request!
+//
+// The shapes in the SVG images are transformed by the viewBox and converted to specified units.
+// That is, you should get the same looking data as your designed in your favorite app.
+//
+// NanoSVG can return the paths in few different units. For example if you want to render an image, you may choose
+// to get the paths in pixels, or if you are feeding the data into a CNC-cutter, you may want to use millimeters.
+//
+// The units passed to NanoSVG should be one of: 'px', 'pt', 'pc' 'mm', 'cm', or 'in'.
+// DPI (dots-per-inch) controls how the unit conversion is done.
+//
+// If you don't know or care about the units stuff, "px" and 96 should get you going.
+
+
+/* Example Usage:
+ // Load SVG
+ NSVGimage* image;
+ image = nsvgParseFromFile("test.svg", "px", 96);
+ printf("size: %f x %f\n", image->width, image->height);
+ // Use...
+ for (NSVGshape *shape = image->shapes; shape != NULL; shape = shape->next) {
+ for (NSVGpath *path = shape->paths; path != NULL; path = path->next) {
+ for (int i = 0; i < path->npts-1; i += 3) {
+ float* p = &path->pts[i*2];
+ drawCubicBez(p[0],p[1], p[2],p[3], p[4],p[5], p[6],p[7]);
+ }
+ }
+ }
+ // Delete
+ nsvgDelete(image);
+*/
+
+enum NSVGpaintType {
+ NSVG_PAINT_UNDEF = -1,
+ NSVG_PAINT_NONE = 0,
+ NSVG_PAINT_COLOR = 1,
+ NSVG_PAINT_LINEAR_GRADIENT = 2,
+ NSVG_PAINT_RADIAL_GRADIENT = 3
+};
+
+enum NSVGspreadType {
+ NSVG_SPREAD_PAD = 0,
+ NSVG_SPREAD_REFLECT = 1,
+ NSVG_SPREAD_REPEAT = 2
+};
+
+enum NSVGlineJoin {
+ NSVG_JOIN_MITER = 0,
+ NSVG_JOIN_ROUND = 1,
+ NSVG_JOIN_BEVEL = 2
+};
+
+enum NSVGlineCap {
+ NSVG_CAP_BUTT = 0,
+ NSVG_CAP_ROUND = 1,
+ NSVG_CAP_SQUARE = 2
+};
+
+enum NSVGfillRule {
+ NSVG_FILLRULE_NONZERO = 0,
+ NSVG_FILLRULE_EVENODD = 1
+};
+
+enum NSVGflags {
+ NSVG_FLAGS_VISIBLE = 0x01
+};
+
+typedef struct NSVGgradientStop {
+ unsigned int color;
+ float offset;
+} NSVGgradientStop;
+
+typedef struct NSVGgradient {
+ float xform[6];
+ char spread;
+ float fx, fy;
+ int nstops;
+ NSVGgradientStop stops[1];
+} NSVGgradient;
+
+typedef struct NSVGpaint {
+ signed char type;
+ union {
+ unsigned int color;
+ NSVGgradient* gradient;
+ };
+} NSVGpaint;
+
+typedef struct NSVGpath
+{
+ float* pts; // Cubic bezier points: x0,y0, [cpx1,cpx1,cpx2,cpy2,x1,y1], ...
+ int npts; // Total number of bezier points.
+ char closed; // Flag indicating if shapes should be treated as closed.
+ float bounds[4]; // Tight bounding box of the shape [minx,miny,maxx,maxy].
+ struct NSVGpath* next; // Pointer to next path, or NULL if last element.
+} NSVGpath;
+
+typedef struct NSVGshape
+{
+ char id[64]; // Optional 'id' attr of the shape or its group
+ NSVGpaint fill; // Fill paint
+ NSVGpaint stroke; // Stroke paint
+ float opacity; // Opacity of the shape.
+ float strokeWidth; // Stroke width (scaled).
+ float strokeDashOffset; // Stroke dash offset (scaled).
+ float strokeDashArray[8]; // Stroke dash array (scaled).
+ char strokeDashCount; // Number of dash values in dash array.
+ char strokeLineJoin; // Stroke join type.
+ char strokeLineCap; // Stroke cap type.
+ float miterLimit; // Miter limit
+ char fillRule; // Fill rule, see NSVGfillRule.
+ unsigned char flags; // Logical or of NSVG_FLAGS_* flags
+ float bounds[4]; // Tight bounding box of the shape [minx,miny,maxx,maxy].
+ char fillGradient[64]; // Optional 'id' of fill gradient
+ char strokeGradient[64]; // Optional 'id' of stroke gradient
+ float xform[6]; // Root transformation for fill/stroke gradient
+ NSVGpath* paths; // Linked list of paths in the image.
+ struct NSVGshape* next; // Pointer to next shape, or NULL if last element.
+} NSVGshape;
+
+typedef struct NSVGimage
+{
+ float width; // Width of the image.
+ float height; // Height of the image.
+ NSVGshape* shapes; // Linked list of shapes in the image.
+} NSVGimage;
+
+// Parses SVG file from a file, returns SVG image as paths.
+NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi);
+
+// Parses SVG file from a null terminated string, returns SVG image as paths.
+// Important note: changes the string.
+NSVGimage* nsvgParse(char* input, const char* units, float dpi);
+
+// Duplicates a path.
+NSVGpath* nsvgDuplicatePath(NSVGpath* p);
+
+// Deletes an image.
+void nsvgDelete(NSVGimage* image);
+
+#ifndef NANOSVG_CPLUSPLUS
+#ifdef __cplusplus
+}
+#endif
+#endif
+
+#ifdef NANOSVG_IMPLEMENTATION
+
+#include
+#include
+#include
+#include
+
+#define NSVG_PI (3.14159265358979323846264338327f)
+#define NSVG_KAPPA90 (0.5522847493f) // Length proportional to radius of a cubic bezier handle for 90deg arcs.
+
+#define NSVG_ALIGN_MIN 0
+#define NSVG_ALIGN_MID 1
+#define NSVG_ALIGN_MAX 2
+#define NSVG_ALIGN_NONE 0
+#define NSVG_ALIGN_MEET 1
+#define NSVG_ALIGN_SLICE 2
+
+#define NSVG_NOTUSED(v) do { (void)(1 ? (void)0 : ( (void)(v) ) ); } while(0)
+#define NSVG_RGB(r, g, b) (((unsigned int)r) | ((unsigned int)g << 8) | ((unsigned int)b << 16))
+
+#ifdef _MSC_VER
+ #pragma warning (disable: 4996) // Switch off security warnings
+ #pragma warning (disable: 4100) // Switch off unreferenced formal parameter warnings
+ #ifdef __cplusplus
+ #define NSVG_INLINE inline
+ #else
+ #define NSVG_INLINE
+ #endif
+#else
+ #define NSVG_INLINE inline
+#endif
+
+
+static int nsvg__isspace(char c)
+{
+ return strchr(" \t\n\v\f\r", c) != 0;
+}
+
+static int nsvg__isdigit(char c)
+{
+ return c >= '0' && c <= '9';
+}
+
+static NSVG_INLINE float nsvg__minf(float a, float b) { return a < b ? a : b; }
+static NSVG_INLINE float nsvg__maxf(float a, float b) { return a > b ? a : b; }
+
+
+// Simple XML parser
+
+#define NSVG_XML_TAG 1
+#define NSVG_XML_CONTENT 2
+#define NSVG_XML_MAX_ATTRIBS 256
+
+static void nsvg__parseContent(char* s,
+ void (*contentCb)(void* ud, const char* s),
+ void* ud)
+{
+ // Trim start white spaces
+ while (*s && nsvg__isspace(*s)) s++;
+ if (!*s) return;
+
+ if (contentCb)
+ (*contentCb)(ud, s);
+}
+
+static void nsvg__parseElement(char* s,
+ void (*startelCb)(void* ud, const char* el, const char** attr),
+ void (*endelCb)(void* ud, const char* el),
+ void* ud)
+{
+ const char* attr[NSVG_XML_MAX_ATTRIBS];
+ int nattr = 0;
+ char* name;
+ int start = 0;
+ int end = 0;
+ char quote;
+
+ // Skip white space after the '<'
+ while (*s && nsvg__isspace(*s)) s++;
+
+ // Check if the tag is end tag
+ if (*s == '/') {
+ s++;
+ end = 1;
+ } else {
+ start = 1;
+ }
+
+ // Skip comments, data and preprocessor stuff.
+ if (!*s || *s == '?' || *s == '!')
+ return;
+
+ // Get tag name
+ name = s;
+ while (*s && !nsvg__isspace(*s)) s++;
+ if (*s) { *s++ = '\0'; }
+
+ // Get attribs
+ while (!end && *s && nattr < NSVG_XML_MAX_ATTRIBS-3) {
+ char* name = NULL;
+ char* value = NULL;
+
+ // Skip white space before the attrib name
+ while (*s && nsvg__isspace(*s)) s++;
+ if (!*s) break;
+ if (*s == '/') {
+ end = 1;
+ break;
+ }
+ name = s;
+ // Find end of the attrib name.
+ while (*s && !nsvg__isspace(*s) && *s != '=') s++;
+ if (*s) { *s++ = '\0'; }
+ // Skip until the beginning of the value.
+ while (*s && *s != '\"' && *s != '\'') s++;
+ if (!*s) break;
+ quote = *s;
+ s++;
+ // Store value and find the end of it.
+ value = s;
+ while (*s && *s != quote) s++;
+ if (*s) { *s++ = '\0'; }
+
+ // Store only well formed attributes
+ if (name && value) {
+ attr[nattr++] = name;
+ attr[nattr++] = value;
+ }
+ }
+
+ // List terminator
+ attr[nattr++] = 0;
+ attr[nattr++] = 0;
+
+ // Call callbacks.
+ if (start && startelCb)
+ (*startelCb)(ud, name, attr);
+ if (end && endelCb)
+ (*endelCb)(ud, name);
+}
+
+int nsvg__parseXML(char* input,
+ void (*startelCb)(void* ud, const char* el, const char** attr),
+ void (*endelCb)(void* ud, const char* el),
+ void (*contentCb)(void* ud, const char* s),
+ void* ud)
+{
+ char* s = input;
+ char* mark = s;
+ int state = NSVG_XML_CONTENT;
+ while (*s) {
+ if (*s == '<' && state == NSVG_XML_CONTENT) {
+ // Start of a tag
+ *s++ = '\0';
+ nsvg__parseContent(mark, contentCb, ud);
+ mark = s;
+ state = NSVG_XML_TAG;
+ } else if (*s == '>' && state == NSVG_XML_TAG) {
+ // Start of a content or new tag.
+ *s++ = '\0';
+ nsvg__parseElement(mark, startelCb, endelCb, ud);
+ mark = s;
+ state = NSVG_XML_CONTENT;
+ } else {
+ s++;
+ }
+ }
+
+ return 1;
+}
+
+
+/* Simple SVG parser. */
+
+#define NSVG_MAX_ATTR 128
+
+enum NSVGgradientUnits {
+ NSVG_USER_SPACE = 0,
+ NSVG_OBJECT_SPACE = 1
+};
+
+#define NSVG_MAX_DASHES 8
+
+enum NSVGunits {
+ NSVG_UNITS_USER,
+ NSVG_UNITS_PX,
+ NSVG_UNITS_PT,
+ NSVG_UNITS_PC,
+ NSVG_UNITS_MM,
+ NSVG_UNITS_CM,
+ NSVG_UNITS_IN,
+ NSVG_UNITS_PERCENT,
+ NSVG_UNITS_EM,
+ NSVG_UNITS_EX
+};
+
+typedef struct NSVGcoordinate {
+ float value;
+ int units;
+} NSVGcoordinate;
+
+typedef struct NSVGlinearData {
+ NSVGcoordinate x1, y1, x2, y2;
+} NSVGlinearData;
+
+typedef struct NSVGradialData {
+ NSVGcoordinate cx, cy, r, fx, fy;
+} NSVGradialData;
+
+typedef struct NSVGgradientData
+{
+ char id[64];
+ char ref[64];
+ signed char type;
+ union {
+ NSVGlinearData linear;
+ NSVGradialData radial;
+ };
+ char spread;
+ char units;
+ float xform[6];
+ int nstops;
+ NSVGgradientStop* stops;
+ struct NSVGgradientData* next;
+} NSVGgradientData;
+
+typedef struct NSVGattrib
+{
+ char id[64];
+ float xform[6];
+ unsigned int fillColor;
+ unsigned int strokeColor;
+ float opacity;
+ float fillOpacity;
+ float strokeOpacity;
+ char fillGradient[64];
+ char strokeGradient[64];
+ float strokeWidth;
+ float strokeDashOffset;
+ float strokeDashArray[NSVG_MAX_DASHES];
+ int strokeDashCount;
+ char strokeLineJoin;
+ char strokeLineCap;
+ float miterLimit;
+ char fillRule;
+ float fontSize;
+ unsigned int stopColor;
+ float stopOpacity;
+ float stopOffset;
+ char hasFill;
+ char hasStroke;
+ char visible;
+} NSVGattrib;
+
+typedef struct NSVGparser
+{
+ NSVGattrib attr[NSVG_MAX_ATTR];
+ int attrHead;
+ float* pts;
+ int npts;
+ int cpts;
+ NSVGpath* plist;
+ NSVGimage* image;
+ NSVGgradientData* gradients;
+ NSVGshape* shapesTail;
+ float viewMinx, viewMiny, viewWidth, viewHeight;
+ int alignX, alignY, alignType;
+ float dpi;
+ char pathFlag;
+ char defsFlag;
+} NSVGparser;
+
+static void nsvg__xformIdentity(float* t)
+{
+ t[0] = 1.0f; t[1] = 0.0f;
+ t[2] = 0.0f; t[3] = 1.0f;
+ t[4] = 0.0f; t[5] = 0.0f;
+}
+
+static void nsvg__xformSetTranslation(float* t, float tx, float ty)
+{
+ t[0] = 1.0f; t[1] = 0.0f;
+ t[2] = 0.0f; t[3] = 1.0f;
+ t[4] = tx; t[5] = ty;
+}
+
+static void nsvg__xformSetScale(float* t, float sx, float sy)
+{
+ t[0] = sx; t[1] = 0.0f;
+ t[2] = 0.0f; t[3] = sy;
+ t[4] = 0.0f; t[5] = 0.0f;
+}
+
+static void nsvg__xformSetSkewX(float* t, float a)
+{
+ t[0] = 1.0f; t[1] = 0.0f;
+ t[2] = tanf(a); t[3] = 1.0f;
+ t[4] = 0.0f; t[5] = 0.0f;
+}
+
+static void nsvg__xformSetSkewY(float* t, float a)
+{
+ t[0] = 1.0f; t[1] = tanf(a);
+ t[2] = 0.0f; t[3] = 1.0f;
+ t[4] = 0.0f; t[5] = 0.0f;
+}
+
+static void nsvg__xformSetRotation(float* t, float a)
+{
+ float cs = cosf(a), sn = sinf(a);
+ t[0] = cs; t[1] = sn;
+ t[2] = -sn; t[3] = cs;
+ t[4] = 0.0f; t[5] = 0.0f;
+}
+
+static void nsvg__xformMultiply(float* t, float* s)
+{
+ float t0 = t[0] * s[0] + t[1] * s[2];
+ float t2 = t[2] * s[0] + t[3] * s[2];
+ float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
+ t[1] = t[0] * s[1] + t[1] * s[3];
+ t[3] = t[2] * s[1] + t[3] * s[3];
+ t[5] = t[4] * s[1] + t[5] * s[3] + s[5];
+ t[0] = t0;
+ t[2] = t2;
+ t[4] = t4;
+}
+
+static void nsvg__xformInverse(float* inv, float* t)
+{
+ double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
+ if (det > -1e-6 && det < 1e-6) {
+ nsvg__xformIdentity(t);
+ return;
+ }
+ invdet = 1.0 / det;
+ inv[0] = (float)(t[3] * invdet);
+ inv[2] = (float)(-t[2] * invdet);
+ inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
+ inv[1] = (float)(-t[1] * invdet);
+ inv[3] = (float)(t[0] * invdet);
+ inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
+}
+
+static void nsvg__xformPremultiply(float* t, float* s)
+{
+ float s2[6];
+ memcpy(s2, s, sizeof(float)*6);
+ nsvg__xformMultiply(s2, t);
+ memcpy(t, s2, sizeof(float)*6);
+}
+
+static void nsvg__xformPoint(float* dx, float* dy, float x, float y, float* t)
+{
+ *dx = x*t[0] + y*t[2] + t[4];
+ *dy = x*t[1] + y*t[3] + t[5];
+}
+
+static void nsvg__xformVec(float* dx, float* dy, float x, float y, float* t)
+{
+ *dx = x*t[0] + y*t[2];
+ *dy = x*t[1] + y*t[3];
+}
+
+#define NSVG_EPSILON (1e-12)
+
+static int nsvg__ptInBounds(float* pt, float* bounds)
+{
+ return pt[0] >= bounds[0] && pt[0] <= bounds[2] && pt[1] >= bounds[1] && pt[1] <= bounds[3];
+}
+
+
+static double nsvg__evalBezier(double t, double p0, double p1, double p2, double p3)
+{
+ double it = 1.0-t;
+ return it*it*it*p0 + 3.0*it*it*t*p1 + 3.0*it*t*t*p2 + t*t*t*p3;
+}
+
+static void nsvg__curveBounds(float* bounds, float* curve)
+{
+ int i, j, count;
+ double roots[2], a, b, c, b2ac, t, v;
+ float* v0 = &curve[0];
+ float* v1 = &curve[2];
+ float* v2 = &curve[4];
+ float* v3 = &curve[6];
+
+ // Start the bounding box by end points
+ bounds[0] = nsvg__minf(v0[0], v3[0]);
+ bounds[1] = nsvg__minf(v0[1], v3[1]);
+ bounds[2] = nsvg__maxf(v0[0], v3[0]);
+ bounds[3] = nsvg__maxf(v0[1], v3[1]);
+
+ // Bezier curve fits inside the convex hull of it's control points.
+ // If control points are inside the bounds, we're done.
+ if (nsvg__ptInBounds(v1, bounds) && nsvg__ptInBounds(v2, bounds))
+ return;
+
+ // Add bezier curve inflection points in X and Y.
+ for (i = 0; i < 2; i++) {
+ a = -3.0 * v0[i] + 9.0 * v1[i] - 9.0 * v2[i] + 3.0 * v3[i];
+ b = 6.0 * v0[i] - 12.0 * v1[i] + 6.0 * v2[i];
+ c = 3.0 * v1[i] - 3.0 * v0[i];
+ count = 0;
+ if (fabs(a) < NSVG_EPSILON) {
+ if (fabs(b) > NSVG_EPSILON) {
+ t = -c / b;
+ if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
+ roots[count++] = t;
+ }
+ } else {
+ b2ac = b*b - 4.0*c*a;
+ if (b2ac > NSVG_EPSILON) {
+ t = (-b + sqrt(b2ac)) / (2.0 * a);
+ if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
+ roots[count++] = t;
+ t = (-b - sqrt(b2ac)) / (2.0 * a);
+ if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
+ roots[count++] = t;
+ }
+ }
+ for (j = 0; j < count; j++) {
+ v = nsvg__evalBezier(roots[j], v0[i], v1[i], v2[i], v3[i]);
+ bounds[0+i] = nsvg__minf(bounds[0+i], (float)v);
+ bounds[2+i] = nsvg__maxf(bounds[2+i], (float)v);
+ }
+ }
+}
+
+static NSVGparser* nsvg__createParser(void)
+{
+ NSVGparser* p;
+ p = (NSVGparser*)malloc(sizeof(NSVGparser));
+ if (p == NULL) goto error;
+ memset(p, 0, sizeof(NSVGparser));
+
+ p->image = (NSVGimage*)malloc(sizeof(NSVGimage));
+ if (p->image == NULL) goto error;
+ memset(p->image, 0, sizeof(NSVGimage));
+
+ // Init style
+ nsvg__xformIdentity(p->attr[0].xform);
+ memset(p->attr[0].id, 0, sizeof p->attr[0].id);
+ p->attr[0].fillColor = NSVG_RGB(0,0,0);
+ p->attr[0].strokeColor = NSVG_RGB(0,0,0);
+ p->attr[0].opacity = 1;
+ p->attr[0].fillOpacity = 1;
+ p->attr[0].strokeOpacity = 1;
+ p->attr[0].stopOpacity = 1;
+ p->attr[0].strokeWidth = 1;
+ p->attr[0].strokeLineJoin = NSVG_JOIN_MITER;
+ p->attr[0].strokeLineCap = NSVG_CAP_BUTT;
+ p->attr[0].miterLimit = 4;
+ p->attr[0].fillRule = NSVG_FILLRULE_NONZERO;
+ p->attr[0].hasFill = 1;
+ p->attr[0].visible = 1;
+
+ return p;
+
+error:
+ if (p) {
+ if (p->image) free(p->image);
+ free(p);
+ }
+ return NULL;
+}
+
+static void nsvg__deletePaths(NSVGpath* path)
+{
+ while (path) {
+ NSVGpath *next = path->next;
+ if (path->pts != NULL)
+ free(path->pts);
+ free(path);
+ path = next;
+ }
+}
+
+static void nsvg__deletePaint(NSVGpaint* paint)
+{
+ if (paint->type == NSVG_PAINT_LINEAR_GRADIENT || paint->type == NSVG_PAINT_RADIAL_GRADIENT)
+ free(paint->gradient);
+}
+
+static void nsvg__deleteGradientData(NSVGgradientData* grad)
+{
+ NSVGgradientData* next;
+ while (grad != NULL) {
+ next = grad->next;
+ free(grad->stops);
+ free(grad);
+ grad = next;
+ }
+}
+
+static void nsvg__deleteParser(NSVGparser* p)
+{
+ if (p != NULL) {
+ nsvg__deletePaths(p->plist);
+ nsvg__deleteGradientData(p->gradients);
+ nsvgDelete(p->image);
+ free(p->pts);
+ free(p);
+ }
+}
+
+static void nsvg__resetPath(NSVGparser* p)
+{
+ p->npts = 0;
+}
+
+static void nsvg__addPoint(NSVGparser* p, float x, float y)
+{
+ if (p->npts+1 > p->cpts) {
+ p->cpts = p->cpts ? p->cpts*2 : 8;
+ p->pts = (float*)realloc(p->pts, p->cpts*2*sizeof(float));
+ if (!p->pts) return;
+ }
+ p->pts[p->npts*2+0] = x;
+ p->pts[p->npts*2+1] = y;
+ p->npts++;
+}
+
+static void nsvg__moveTo(NSVGparser* p, float x, float y)
+{
+ if (p->npts > 0) {
+ p->pts[(p->npts-1)*2+0] = x;
+ p->pts[(p->npts-1)*2+1] = y;
+ } else {
+ nsvg__addPoint(p, x, y);
+ }
+}
+
+static void nsvg__lineTo(NSVGparser* p, float x, float y)
+{
+ float px,py, dx,dy;
+ if (p->npts > 0) {
+ px = p->pts[(p->npts-1)*2+0];
+ py = p->pts[(p->npts-1)*2+1];
+ dx = x - px;
+ dy = y - py;
+ nsvg__addPoint(p, px + dx/3.0f, py + dy/3.0f);
+ nsvg__addPoint(p, x - dx/3.0f, y - dy/3.0f);
+ nsvg__addPoint(p, x, y);
+ }
+}
+
+static void nsvg__cubicBezTo(NSVGparser* p, float cpx1, float cpy1, float cpx2, float cpy2, float x, float y)
+{
+ if (p->npts > 0) {
+ nsvg__addPoint(p, cpx1, cpy1);
+ nsvg__addPoint(p, cpx2, cpy2);
+ nsvg__addPoint(p, x, y);
+ }
+}
+
+static NSVGattrib* nsvg__getAttr(NSVGparser* p)
+{
+ return &p->attr[p->attrHead];
+}
+
+static void nsvg__pushAttr(NSVGparser* p)
+{
+ if (p->attrHead < NSVG_MAX_ATTR-1) {
+ p->attrHead++;
+ memcpy(&p->attr[p->attrHead], &p->attr[p->attrHead-1], sizeof(NSVGattrib));
+ }
+}
+
+static void nsvg__popAttr(NSVGparser* p)
+{
+ if (p->attrHead > 0)
+ p->attrHead--;
+}
+
+static float nsvg__actualOrigX(NSVGparser* p)
+{
+ return p->viewMinx;
+}
+
+static float nsvg__actualOrigY(NSVGparser* p)
+{
+ return p->viewMiny;
+}
+
+static float nsvg__actualWidth(NSVGparser* p)
+{
+ return p->viewWidth;
+}
+
+static float nsvg__actualHeight(NSVGparser* p)
+{
+ return p->viewHeight;
+}
+
+static float nsvg__actualLength(NSVGparser* p)
+{
+ float w = nsvg__actualWidth(p), h = nsvg__actualHeight(p);
+ return sqrtf(w*w + h*h) / sqrtf(2.0f);
+}
+
+static float nsvg__convertToPixels(NSVGparser* p, NSVGcoordinate c, float orig, float length)
+{
+ NSVGattrib* attr = nsvg__getAttr(p);
+ switch (c.units) {
+ case NSVG_UNITS_USER: return c.value;
+ case NSVG_UNITS_PX: return c.value;
+ case NSVG_UNITS_PT: return c.value / 72.0f * p->dpi;
+ case NSVG_UNITS_PC: return c.value / 6.0f * p->dpi;
+ case NSVG_UNITS_MM: return c.value / 25.4f * p->dpi;
+ case NSVG_UNITS_CM: return c.value / 2.54f * p->dpi;
+ case NSVG_UNITS_IN: return c.value * p->dpi;
+ case NSVG_UNITS_EM: return c.value * attr->fontSize;
+ case NSVG_UNITS_EX: return c.value * attr->fontSize * 0.52f; // x-height of Helvetica.
+ case NSVG_UNITS_PERCENT: return orig + c.value / 100.0f * length;
+ default: return c.value;
+ }
+ return c.value;
+}
+
+static NSVGgradientData* nsvg__findGradientData(NSVGparser* p, const char* id)
+{
+ NSVGgradientData* grad = p->gradients;
+ if (id == NULL || *id == '\0')
+ return NULL;
+ while (grad != NULL) {
+ if (strcmp(grad->id, id) == 0)
+ return grad;
+ grad = grad->next;
+ }
+ return NULL;
+}
+
+static NSVGgradient* nsvg__createGradient(NSVGparser* p, const char* id, const float* localBounds, float *xform, signed char* paintType)
+{
+ NSVGgradientData* data = NULL;
+ NSVGgradientData* ref = NULL;
+ NSVGgradientStop* stops = NULL;
+ NSVGgradient* grad;
+ float ox, oy, sw, sh, sl;
+ int nstops = 0;
+ int refIter;
+
+ data = nsvg__findGradientData(p, id);
+ if (data == NULL) return NULL;
+
+ // TODO: use ref to fill in all unset values too.
+ ref = data;
+ refIter = 0;
+ while (ref != NULL) {
+ NSVGgradientData* nextRef = NULL;
+ if (stops == NULL && ref->stops != NULL) {
+ stops = ref->stops;
+ nstops = ref->nstops;
+ break;
+ }
+ nextRef = nsvg__findGradientData(p, ref->ref);
+ if (nextRef == ref) break; // prevent infite loops on malformed data
+ ref = nextRef;
+ refIter++;
+ if (refIter > 32) break; // prevent infite loops on malformed data
+ }
+ if (stops == NULL) return NULL;
+
+ grad = (NSVGgradient*)malloc(sizeof(NSVGgradient) + sizeof(NSVGgradientStop)*(nstops-1));
+ if (grad == NULL) return NULL;
+
+ // The shape width and height.
+ if (data->units == NSVG_OBJECT_SPACE) {
+ ox = localBounds[0];
+ oy = localBounds[1];
+ sw = localBounds[2] - localBounds[0];
+ sh = localBounds[3] - localBounds[1];
+ } else {
+ ox = nsvg__actualOrigX(p);
+ oy = nsvg__actualOrigY(p);
+ sw = nsvg__actualWidth(p);
+ sh = nsvg__actualHeight(p);
+ }
+ sl = sqrtf(sw*sw + sh*sh) / sqrtf(2.0f);
+
+ if (data->type == NSVG_PAINT_LINEAR_GRADIENT) {
+ float x1, y1, x2, y2, dx, dy;
+ x1 = nsvg__convertToPixels(p, data->linear.x1, ox, sw);
+ y1 = nsvg__convertToPixels(p, data->linear.y1, oy, sh);
+ x2 = nsvg__convertToPixels(p, data->linear.x2, ox, sw);
+ y2 = nsvg__convertToPixels(p, data->linear.y2, oy, sh);
+ // Calculate transform aligned to the line
+ dx = x2 - x1;
+ dy = y2 - y1;
+ grad->xform[0] = dy; grad->xform[1] = -dx;
+ grad->xform[2] = dx; grad->xform[3] = dy;
+ grad->xform[4] = x1; grad->xform[5] = y1;
+ } else {
+ float cx, cy, fx, fy, r;
+ cx = nsvg__convertToPixels(p, data->radial.cx, ox, sw);
+ cy = nsvg__convertToPixels(p, data->radial.cy, oy, sh);
+ fx = nsvg__convertToPixels(p, data->radial.fx, ox, sw);
+ fy = nsvg__convertToPixels(p, data->radial.fy, oy, sh);
+ r = nsvg__convertToPixels(p, data->radial.r, 0, sl);
+ // Calculate transform aligned to the circle
+ grad->xform[0] = r; grad->xform[1] = 0;
+ grad->xform[2] = 0; grad->xform[3] = r;
+ grad->xform[4] = cx; grad->xform[5] = cy;
+ grad->fx = fx / r;
+ grad->fy = fy / r;
+ }
+
+ nsvg__xformMultiply(grad->xform, data->xform);
+ nsvg__xformMultiply(grad->xform, xform);
+
+ grad->spread = data->spread;
+ memcpy(grad->stops, stops, nstops*sizeof(NSVGgradientStop));
+ grad->nstops = nstops;
+
+ *paintType = data->type;
+
+ return grad;
+}
+
+static float nsvg__getAverageScale(float* t)
+{
+ float sx = sqrtf(t[0]*t[0] + t[2]*t[2]);
+ float sy = sqrtf(t[1]*t[1] + t[3]*t[3]);
+ return (sx + sy) * 0.5f;
+}
+
+static void nsvg__getLocalBounds(float* bounds, NSVGshape *shape, float* xform)
+{
+ NSVGpath* path;
+ float curve[4*2], curveBounds[4];
+ int i, first = 1;
+ for (path = shape->paths; path != NULL; path = path->next) {
+ nsvg__xformPoint(&curve[0], &curve[1], path->pts[0], path->pts[1], xform);
+ for (i = 0; i < path->npts-1; i += 3) {
+ nsvg__xformPoint(&curve[2], &curve[3], path->pts[(i+1)*2], path->pts[(i+1)*2+1], xform);
+ nsvg__xformPoint(&curve[4], &curve[5], path->pts[(i+2)*2], path->pts[(i+2)*2+1], xform);
+ nsvg__xformPoint(&curve[6], &curve[7], path->pts[(i+3)*2], path->pts[(i+3)*2+1], xform);
+ nsvg__curveBounds(curveBounds, curve);
+ if (first) {
+ bounds[0] = curveBounds[0];
+ bounds[1] = curveBounds[1];
+ bounds[2] = curveBounds[2];
+ bounds[3] = curveBounds[3];
+ first = 0;
+ } else {
+ bounds[0] = nsvg__minf(bounds[0], curveBounds[0]);
+ bounds[1] = nsvg__minf(bounds[1], curveBounds[1]);
+ bounds[2] = nsvg__maxf(bounds[2], curveBounds[2]);
+ bounds[3] = nsvg__maxf(bounds[3], curveBounds[3]);
+ }
+ curve[0] = curve[6];
+ curve[1] = curve[7];
+ }
+ }
+}
+
+static void nsvg__addShape(NSVGparser* p)
+{
+ NSVGattrib* attr = nsvg__getAttr(p);
+ float scale = 1.0f;
+ NSVGshape* shape;
+ NSVGpath* path;
+ int i;
+
+ if (p->plist == NULL)
+ return;
+
+ shape = (NSVGshape*)malloc(sizeof(NSVGshape));
+ if (shape == NULL) goto error;
+ memset(shape, 0, sizeof(NSVGshape));
+
+ memcpy(shape->id, attr->id, sizeof shape->id);
+ memcpy(shape->fillGradient, attr->fillGradient, sizeof shape->fillGradient);
+ memcpy(shape->strokeGradient, attr->strokeGradient, sizeof shape->strokeGradient);
+ memcpy(shape->xform, attr->xform, sizeof shape->xform);
+ scale = nsvg__getAverageScale(attr->xform);
+ shape->strokeWidth = attr->strokeWidth * scale;
+ shape->strokeDashOffset = attr->strokeDashOffset * scale;
+ shape->strokeDashCount = (char)attr->strokeDashCount;
+ for (i = 0; i < attr->strokeDashCount; i++)
+ shape->strokeDashArray[i] = attr->strokeDashArray[i] * scale;
+ shape->strokeLineJoin = attr->strokeLineJoin;
+ shape->strokeLineCap = attr->strokeLineCap;
+ shape->miterLimit = attr->miterLimit;
+ shape->fillRule = attr->fillRule;
+ shape->opacity = attr->opacity;
+
+ shape->paths = p->plist;
+ p->plist = NULL;
+
+ // Calculate shape bounds
+ shape->bounds[0] = shape->paths->bounds[0];
+ shape->bounds[1] = shape->paths->bounds[1];
+ shape->bounds[2] = shape->paths->bounds[2];
+ shape->bounds[3] = shape->paths->bounds[3];
+ for (path = shape->paths->next; path != NULL; path = path->next) {
+ shape->bounds[0] = nsvg__minf(shape->bounds[0], path->bounds[0]);
+ shape->bounds[1] = nsvg__minf(shape->bounds[1], path->bounds[1]);
+ shape->bounds[2] = nsvg__maxf(shape->bounds[2], path->bounds[2]);
+ shape->bounds[3] = nsvg__maxf(shape->bounds[3], path->bounds[3]);
+ }
+
+ // Set fill
+ if (attr->hasFill == 0) {
+ shape->fill.type = NSVG_PAINT_NONE;
+ } else if (attr->hasFill == 1) {
+ shape->fill.type = NSVG_PAINT_COLOR;
+ shape->fill.color = attr->fillColor;
+ shape->fill.color |= (unsigned int)(attr->fillOpacity*255) << 24;
+ } else if (attr->hasFill == 2) {
+ shape->fill.type = NSVG_PAINT_UNDEF;
+ }
+
+ // Set stroke
+ if (attr->hasStroke == 0) {
+ shape->stroke.type = NSVG_PAINT_NONE;
+ } else if (attr->hasStroke == 1) {
+ shape->stroke.type = NSVG_PAINT_COLOR;
+ shape->stroke.color = attr->strokeColor;
+ shape->stroke.color |= (unsigned int)(attr->strokeOpacity*255) << 24;
+ } else if (attr->hasStroke == 2) {
+ shape->stroke.type = NSVG_PAINT_UNDEF;
+ }
+
+ // Set flags
+ shape->flags = (attr->visible ? NSVG_FLAGS_VISIBLE : 0x00);
+
+ // Add to tail
+ if (p->image->shapes == NULL)
+ p->image->shapes = shape;
+ else
+ p->shapesTail->next = shape;
+ p->shapesTail = shape;
+
+ return;
+
+error:
+ if (shape) free(shape);
+}
+
+static void nsvg__addPath(NSVGparser* p, char closed)
+{
+ NSVGattrib* attr = nsvg__getAttr(p);
+ NSVGpath* path = NULL;
+ float bounds[4];
+ float* curve;
+ int i;
+
+ if (p->npts < 4)
+ return;
+
+ if (closed)
+ nsvg__lineTo(p, p->pts[0], p->pts[1]);
+
+ // Expect 1 + N*3 points (N = number of cubic bezier segments).
+ if ((p->npts % 3) != 1)
+ return;
+
+ path = (NSVGpath*)malloc(sizeof(NSVGpath));
+ if (path == NULL) goto error;
+ memset(path, 0, sizeof(NSVGpath));
+
+ path->pts = (float*)malloc(p->npts*2*sizeof(float));
+ if (path->pts == NULL) goto error;
+ path->closed = closed;
+ path->npts = p->npts;
+
+ // Transform path.
+ for (i = 0; i < p->npts; ++i)
+ nsvg__xformPoint(&path->pts[i*2], &path->pts[i*2+1], p->pts[i*2], p->pts[i*2+1], attr->xform);
+
+ // Find bounds
+ for (i = 0; i < path->npts-1; i += 3) {
+ curve = &path->pts[i*2];
+ nsvg__curveBounds(bounds, curve);
+ if (i == 0) {
+ path->bounds[0] = bounds[0];
+ path->bounds[1] = bounds[1];
+ path->bounds[2] = bounds[2];
+ path->bounds[3] = bounds[3];
+ } else {
+ path->bounds[0] = nsvg__minf(path->bounds[0], bounds[0]);
+ path->bounds[1] = nsvg__minf(path->bounds[1], bounds[1]);
+ path->bounds[2] = nsvg__maxf(path->bounds[2], bounds[2]);
+ path->bounds[3] = nsvg__maxf(path->bounds[3], bounds[3]);
+ }
+ }
+
+ path->next = p->plist;
+ p->plist = path;
+
+ return;
+
+error:
+ if (path != NULL) {
+ if (path->pts != NULL) free(path->pts);
+ free(path);
+ }
+}
+
+// We roll our own string to float because the std library one uses locale and messes things up.
+static double nsvg__atof(const char* s)
+{
+ char* cur = (char*)s;
+ char* end = NULL;
+ double res = 0.0, sign = 1.0;
+ long long intPart = 0, fracPart = 0;
+ char hasIntPart = 0, hasFracPart = 0;
+
+ // Parse optional sign
+ if (*cur == '+') {
+ cur++;
+ } else if (*cur == '-') {
+ sign = -1;
+ cur++;
+ }
+
+ // Parse integer part
+ if (nsvg__isdigit(*cur)) {
+ // Parse digit sequence
+ intPart = strtoll(cur, &end, 10);
+ if (cur != end) {
+ res = (double)intPart;
+ hasIntPart = 1;
+ cur = end;
+ }
+ }
+
+ // Parse fractional part.
+ if (*cur == '.') {
+ cur++; // Skip '.'
+ if (nsvg__isdigit(*cur)) {
+ // Parse digit sequence
+ fracPart = strtoll(cur, &end, 10);
+ if (cur != end) {
+ res += (double)fracPart / pow(10.0, (double)(end - cur));
+ hasFracPart = 1;
+ cur = end;
+ }
+ }
+ }
+
+ // A valid number should have integer or fractional part.
+ if (!hasIntPart && !hasFracPart)
+ return 0.0;
+
+ // Parse optional exponent
+ if (*cur == 'e' || *cur == 'E') {
+ long expPart = 0;
+ cur++; // skip 'E'
+ expPart = strtol(cur, &end, 10); // Parse digit sequence with sign
+ if (cur != end) {
+ res *= pow(10.0, (double)expPart);
+ }
+ }
+
+ return res * sign;
+}
+
+
+static const char* nsvg__parseNumber(const char* s, char* it, const int size)
+{
+ const int last = size-1;
+ int i = 0;
+
+ // sign
+ if (*s == '-' || *s == '+') {
+ if (i < last) it[i++] = *s;
+ s++;
+ }
+ // integer part
+ while (*s && nsvg__isdigit(*s)) {
+ if (i < last) it[i++] = *s;
+ s++;
+ }
+ if (*s == '.') {
+ // decimal point
+ if (i < last) it[i++] = *s;
+ s++;
+ // fraction part
+ while (*s && nsvg__isdigit(*s)) {
+ if (i < last) it[i++] = *s;
+ s++;
+ }
+ }
+ // exponent
+ if ((*s == 'e' || *s == 'E') && (s[1] != 'm' && s[1] != 'x')) {
+ if (i < last) it[i++] = *s;
+ s++;
+ if (*s == '-' || *s == '+') {
+ if (i < last) it[i++] = *s;
+ s++;
+ }
+ while (*s && nsvg__isdigit(*s)) {
+ if (i < last) it[i++] = *s;
+ s++;
+ }
+ }
+ it[i] = '\0';
+
+ return s;
+}
+
+static const char* nsvg__getNextPathItemWhenArcFlag(const char* s, char* it)
+{
+ it[0] = '\0';
+ while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
+ if (!*s) return s;
+ if (*s == '0' || *s == '1') {
+ it[0] = *s++;
+ it[1] = '\0';
+ return s;
+ }
+ return s;
+}
+
+static const char* nsvg__getNextPathItem(const char* s, char* it)
+{
+ it[0] = '\0';
+ // Skip white spaces and commas
+ while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
+ if (!*s) return s;
+ if (*s == '-' || *s == '+' || *s == '.' || nsvg__isdigit(*s)) {
+ s = nsvg__parseNumber(s, it, 64);
+ } else {
+ // Parse command
+ it[0] = *s++;
+ it[1] = '\0';
+ return s;
+ }
+
+ return s;
+}
+
+static unsigned int nsvg__parseColorHex(const char* str)
+{
+ unsigned int r=0, g=0, b=0;
+ if (sscanf(str, "#%2x%2x%2x", &r, &g, &b) == 3 ) // 2 digit hex
+ return NSVG_RGB(r, g, b);
+ if (sscanf(str, "#%1x%1x%1x", &r, &g, &b) == 3 ) // 1 digit hex, e.g. #abc -> 0xccbbaa
+ return NSVG_RGB(r*17, g*17, b*17); // same effect as (r<<4|r), (g<<4|g), ..
+ return NSVG_RGB(128, 128, 128);
+}
+
+// Parse rgb color. The pointer 'str' must point at "rgb(" (4+ characters).
+// This function returns gray (rgb(128, 128, 128) == '#808080') on parse errors
+// for backwards compatibility. Note: other image viewers return black instead.
+
+static unsigned int nsvg__parseColorRGB(const char* str)
+{
+ int i;
+ unsigned int rgbi[3];
+ float rgbf[3];
+ // try decimal integers first
+ if (sscanf(str, "rgb(%u, %u, %u)", &rgbi[0], &rgbi[1], &rgbi[2]) != 3) {
+ // integers failed, try percent values (float, locale independent)
+ const char delimiter[3] = {',', ',', ')'};
+ str += 4; // skip "rgb("
+ for (i = 0; i < 3; i++) {
+ while (*str && (nsvg__isspace(*str))) str++; // skip leading spaces
+ if (*str == '+') str++; // skip '+' (don't allow '-')
+ if (!*str) break;
+ rgbf[i] = nsvg__atof(str);
+
+ // Note 1: it would be great if nsvg__atof() returned how many
+ // bytes it consumed but it doesn't. We need to skip the number,
+ // the '%' character, spaces, and the delimiter ',' or ')'.
+
+ // Note 2: The following code does not allow values like "33.%",
+ // i.e. a decimal point w/o fractional part, but this is consistent
+ // with other image viewers, e.g. firefox, chrome, eog, gimp.
+
+ while (*str && nsvg__isdigit(*str)) str++; // skip integer part
+ if (*str == '.') {
+ str++;
+ if (!nsvg__isdigit(*str)) break; // error: no digit after '.'
+ while (*str && nsvg__isdigit(*str)) str++; // skip fractional part
+ }
+ if (*str == '%') str++; else break;
+ while (*str && nsvg__isspace(*str)) str++;
+ if (*str == delimiter[i]) str++;
+ else break;
+ }
+ if (i == 3) {
+ rgbi[0] = roundf(rgbf[0] * 2.55f);
+ rgbi[1] = roundf(rgbf[1] * 2.55f);
+ rgbi[2] = roundf(rgbf[2] * 2.55f);
+ } else {
+ rgbi[0] = rgbi[1] = rgbi[2] = 128;
+ }
+ }
+ // clip values as the CSS spec requires
+ for (i = 0; i < 3; i++) {
+ if (rgbi[i] > 255) rgbi[i] = 255;
+ }
+ return NSVG_RGB(rgbi[0], rgbi[1], rgbi[2]);
+}
+
+typedef struct NSVGNamedColor {
+ const char* name;
+ unsigned int color;
+} NSVGNamedColor;
+
+NSVGNamedColor nsvg__colors[] = {
+
+ { "red", NSVG_RGB(255, 0, 0) },
+ { "green", NSVG_RGB( 0, 128, 0) },
+ { "blue", NSVG_RGB( 0, 0, 255) },
+ { "yellow", NSVG_RGB(255, 255, 0) },
+ { "cyan", NSVG_RGB( 0, 255, 255) },
+ { "magenta", NSVG_RGB(255, 0, 255) },
+ { "black", NSVG_RGB( 0, 0, 0) },
+ { "grey", NSVG_RGB(128, 128, 128) },
+ { "gray", NSVG_RGB(128, 128, 128) },
+ { "white", NSVG_RGB(255, 255, 255) },
+
+#ifdef NANOSVG_ALL_COLOR_KEYWORDS
+ { "aliceblue", NSVG_RGB(240, 248, 255) },
+ { "antiquewhite", NSVG_RGB(250, 235, 215) },
+ { "aqua", NSVG_RGB( 0, 255, 255) },
+ { "aquamarine", NSVG_RGB(127, 255, 212) },
+ { "azure", NSVG_RGB(240, 255, 255) },
+ { "beige", NSVG_RGB(245, 245, 220) },
+ { "bisque", NSVG_RGB(255, 228, 196) },
+ { "blanchedalmond", NSVG_RGB(255, 235, 205) },
+ { "blueviolet", NSVG_RGB(138, 43, 226) },
+ { "brown", NSVG_RGB(165, 42, 42) },
+ { "burlywood", NSVG_RGB(222, 184, 135) },
+ { "cadetblue", NSVG_RGB( 95, 158, 160) },
+ { "chartreuse", NSVG_RGB(127, 255, 0) },
+ { "chocolate", NSVG_RGB(210, 105, 30) },
+ { "coral", NSVG_RGB(255, 127, 80) },
+ { "cornflowerblue", NSVG_RGB(100, 149, 237) },
+ { "cornsilk", NSVG_RGB(255, 248, 220) },
+ { "crimson", NSVG_RGB(220, 20, 60) },
+ { "darkblue", NSVG_RGB( 0, 0, 139) },
+ { "darkcyan", NSVG_RGB( 0, 139, 139) },
+ { "darkgoldenrod", NSVG_RGB(184, 134, 11) },
+ { "darkgray", NSVG_RGB(169, 169, 169) },
+ { "darkgreen", NSVG_RGB( 0, 100, 0) },
+ { "darkgrey", NSVG_RGB(169, 169, 169) },
+ { "darkkhaki", NSVG_RGB(189, 183, 107) },
+ { "darkmagenta", NSVG_RGB(139, 0, 139) },
+ { "darkolivegreen", NSVG_RGB( 85, 107, 47) },
+ { "darkorange", NSVG_RGB(255, 140, 0) },
+ { "darkorchid", NSVG_RGB(153, 50, 204) },
+ { "darkred", NSVG_RGB(139, 0, 0) },
+ { "darksalmon", NSVG_RGB(233, 150, 122) },
+ { "darkseagreen", NSVG_RGB(143, 188, 143) },
+ { "darkslateblue", NSVG_RGB( 72, 61, 139) },
+ { "darkslategray", NSVG_RGB( 47, 79, 79) },
+ { "darkslategrey", NSVG_RGB( 47, 79, 79) },
+ { "darkturquoise", NSVG_RGB( 0, 206, 209) },
+ { "darkviolet", NSVG_RGB(148, 0, 211) },
+ { "deeppink", NSVG_RGB(255, 20, 147) },
+ { "deepskyblue", NSVG_RGB( 0, 191, 255) },
+ { "dimgray", NSVG_RGB(105, 105, 105) },
+ { "dimgrey", NSVG_RGB(105, 105, 105) },
+ { "dodgerblue", NSVG_RGB( 30, 144, 255) },
+ { "firebrick", NSVG_RGB(178, 34, 34) },
+ { "floralwhite", NSVG_RGB(255, 250, 240) },
+ { "forestgreen", NSVG_RGB( 34, 139, 34) },
+ { "fuchsia", NSVG_RGB(255, 0, 255) },
+ { "gainsboro", NSVG_RGB(220, 220, 220) },
+ { "ghostwhite", NSVG_RGB(248, 248, 255) },
+ { "gold", NSVG_RGB(255, 215, 0) },
+ { "goldenrod", NSVG_RGB(218, 165, 32) },
+ { "greenyellow", NSVG_RGB(173, 255, 47) },
+ { "honeydew", NSVG_RGB(240, 255, 240) },
+ { "hotpink", NSVG_RGB(255, 105, 180) },
+ { "indianred", NSVG_RGB(205, 92, 92) },
+ { "indigo", NSVG_RGB( 75, 0, 130) },
+ { "ivory", NSVG_RGB(255, 255, 240) },
+ { "khaki", NSVG_RGB(240, 230, 140) },
+ { "lavender", NSVG_RGB(230, 230, 250) },
+ { "lavenderblush", NSVG_RGB(255, 240, 245) },
+ { "lawngreen", NSVG_RGB(124, 252, 0) },
+ { "lemonchiffon", NSVG_RGB(255, 250, 205) },
+ { "lightblue", NSVG_RGB(173, 216, 230) },
+ { "lightcoral", NSVG_RGB(240, 128, 128) },
+ { "lightcyan", NSVG_RGB(224, 255, 255) },
+ { "lightgoldenrodyellow", NSVG_RGB(250, 250, 210) },
+ { "lightgray", NSVG_RGB(211, 211, 211) },
+ { "lightgreen", NSVG_RGB(144, 238, 144) },
+ { "lightgrey", NSVG_RGB(211, 211, 211) },
+ { "lightpink", NSVG_RGB(255, 182, 193) },
+ { "lightsalmon", NSVG_RGB(255, 160, 122) },
+ { "lightseagreen", NSVG_RGB( 32, 178, 170) },
+ { "lightskyblue", NSVG_RGB(135, 206, 250) },
+ { "lightslategray", NSVG_RGB(119, 136, 153) },
+ { "lightslategrey", NSVG_RGB(119, 136, 153) },
+ { "lightsteelblue", NSVG_RGB(176, 196, 222) },
+ { "lightyellow", NSVG_RGB(255, 255, 224) },
+ { "lime", NSVG_RGB( 0, 255, 0) },
+ { "limegreen", NSVG_RGB( 50, 205, 50) },
+ { "linen", NSVG_RGB(250, 240, 230) },
+ { "maroon", NSVG_RGB(128, 0, 0) },
+ { "mediumaquamarine", NSVG_RGB(102, 205, 170) },
+ { "mediumblue", NSVG_RGB( 0, 0, 205) },
+ { "mediumorchid", NSVG_RGB(186, 85, 211) },
+ { "mediumpurple", NSVG_RGB(147, 112, 219) },
+ { "mediumseagreen", NSVG_RGB( 60, 179, 113) },
+ { "mediumslateblue", NSVG_RGB(123, 104, 238) },
+ { "mediumspringgreen", NSVG_RGB( 0, 250, 154) },
+ { "mediumturquoise", NSVG_RGB( 72, 209, 204) },
+ { "mediumvioletred", NSVG_RGB(199, 21, 133) },
+ { "midnightblue", NSVG_RGB( 25, 25, 112) },
+ { "mintcream", NSVG_RGB(245, 255, 250) },
+ { "mistyrose", NSVG_RGB(255, 228, 225) },
+ { "moccasin", NSVG_RGB(255, 228, 181) },
+ { "navajowhite", NSVG_RGB(255, 222, 173) },
+ { "navy", NSVG_RGB( 0, 0, 128) },
+ { "oldlace", NSVG_RGB(253, 245, 230) },
+ { "olive", NSVG_RGB(128, 128, 0) },
+ { "olivedrab", NSVG_RGB(107, 142, 35) },
+ { "orange", NSVG_RGB(255, 165, 0) },
+ { "orangered", NSVG_RGB(255, 69, 0) },
+ { "orchid", NSVG_RGB(218, 112, 214) },
+ { "palegoldenrod", NSVG_RGB(238, 232, 170) },
+ { "palegreen", NSVG_RGB(152, 251, 152) },
+ { "paleturquoise", NSVG_RGB(175, 238, 238) },
+ { "palevioletred", NSVG_RGB(219, 112, 147) },
+ { "papayawhip", NSVG_RGB(255, 239, 213) },
+ { "peachpuff", NSVG_RGB(255, 218, 185) },
+ { "peru", NSVG_RGB(205, 133, 63) },
+ { "pink", NSVG_RGB(255, 192, 203) },
+ { "plum", NSVG_RGB(221, 160, 221) },
+ { "powderblue", NSVG_RGB(176, 224, 230) },
+ { "purple", NSVG_RGB(128, 0, 128) },
+ { "rosybrown", NSVG_RGB(188, 143, 143) },
+ { "royalblue", NSVG_RGB( 65, 105, 225) },
+ { "saddlebrown", NSVG_RGB(139, 69, 19) },
+ { "salmon", NSVG_RGB(250, 128, 114) },
+ { "sandybrown", NSVG_RGB(244, 164, 96) },
+ { "seagreen", NSVG_RGB( 46, 139, 87) },
+ { "seashell", NSVG_RGB(255, 245, 238) },
+ { "sienna", NSVG_RGB(160, 82, 45) },
+ { "silver", NSVG_RGB(192, 192, 192) },
+ { "skyblue", NSVG_RGB(135, 206, 235) },
+ { "slateblue", NSVG_RGB(106, 90, 205) },
+ { "slategray", NSVG_RGB(112, 128, 144) },
+ { "slategrey", NSVG_RGB(112, 128, 144) },
+ { "snow", NSVG_RGB(255, 250, 250) },
+ { "springgreen", NSVG_RGB( 0, 255, 127) },
+ { "steelblue", NSVG_RGB( 70, 130, 180) },
+ { "tan", NSVG_RGB(210, 180, 140) },
+ { "teal", NSVG_RGB( 0, 128, 128) },
+ { "thistle", NSVG_RGB(216, 191, 216) },
+ { "tomato", NSVG_RGB(255, 99, 71) },
+ { "turquoise", NSVG_RGB( 64, 224, 208) },
+ { "violet", NSVG_RGB(238, 130, 238) },
+ { "wheat", NSVG_RGB(245, 222, 179) },
+ { "whitesmoke", NSVG_RGB(245, 245, 245) },
+ { "yellowgreen", NSVG_RGB(154, 205, 50) },
+#endif
+};
+
+static unsigned int nsvg__parseColorName(const char* str)
+{
+ int i, ncolors = sizeof(nsvg__colors) / sizeof(NSVGNamedColor);
+
+ for (i = 0; i < ncolors; i++) {
+ if (strcmp(nsvg__colors[i].name, str) == 0) {
+ return nsvg__colors[i].color;
+ }
+ }
+
+ return NSVG_RGB(128, 128, 128);
+}
+
+static unsigned int nsvg__parseColor(const char* str)
+{
+ size_t len = 0;
+ while(*str == ' ') ++str;
+ len = strlen(str);
+ if (len >= 1 && *str == '#')
+ return nsvg__parseColorHex(str);
+ else if (len >= 4 && str[0] == 'r' && str[1] == 'g' && str[2] == 'b' && str[3] == '(')
+ return nsvg__parseColorRGB(str);
+ return nsvg__parseColorName(str);
+}
+
+static float nsvg__parseOpacity(const char* str)
+{
+ float val = nsvg__atof(str);
+ if (val < 0.0f) val = 0.0f;
+ if (val > 1.0f) val = 1.0f;
+ return val;
+}
+
+static float nsvg__parseMiterLimit(const char* str)
+{
+ float val = nsvg__atof(str);
+ if (val < 0.0f) val = 0.0f;
+ return val;
+}
+
+static int nsvg__parseUnits(const char* units)
+{
+ if (units[0] == 'p' && units[1] == 'x')
+ return NSVG_UNITS_PX;
+ else if (units[0] == 'p' && units[1] == 't')
+ return NSVG_UNITS_PT;
+ else if (units[0] == 'p' && units[1] == 'c')
+ return NSVG_UNITS_PC;
+ else if (units[0] == 'm' && units[1] == 'm')
+ return NSVG_UNITS_MM;
+ else if (units[0] == 'c' && units[1] == 'm')
+ return NSVG_UNITS_CM;
+ else if (units[0] == 'i' && units[1] == 'n')
+ return NSVG_UNITS_IN;
+ else if (units[0] == '%')
+ return NSVG_UNITS_PERCENT;
+ else if (units[0] == 'e' && units[1] == 'm')
+ return NSVG_UNITS_EM;
+ else if (units[0] == 'e' && units[1] == 'x')
+ return NSVG_UNITS_EX;
+ return NSVG_UNITS_USER;
+}
+
+static int nsvg__isCoordinate(const char* s)
+{
+ // optional sign
+ if (*s == '-' || *s == '+')
+ s++;
+ // must have at least one digit, or start by a dot
+ return (nsvg__isdigit(*s) || *s == '.');
+}
+
+static NSVGcoordinate nsvg__parseCoordinateRaw(const char* str)
+{
+ NSVGcoordinate coord = {0, NSVG_UNITS_USER};
+ char buf[64];
+ coord.units = nsvg__parseUnits(nsvg__parseNumber(str, buf, 64));
+ coord.value = nsvg__atof(buf);
+ return coord;
+}
+
+static NSVGcoordinate nsvg__coord(float v, int units)
+{
+ NSVGcoordinate coord = {v, units};
+ return coord;
+}
+
+static float nsvg__parseCoordinate(NSVGparser* p, const char* str, float orig, float length)
+{
+ NSVGcoordinate coord = nsvg__parseCoordinateRaw(str);
+ return nsvg__convertToPixels(p, coord, orig, length);
+}
+
+static int nsvg__parseTransformArgs(const char* str, float* args, int maxNa, int* na)
+{
+ const char* end;
+ const char* ptr;
+ char it[64];
+
+ *na = 0;
+ ptr = str;
+ while (*ptr && *ptr != '(') ++ptr;
+ if (*ptr == 0)
+ return 1;
+ end = ptr;
+ while (*end && *end != ')') ++end;
+ if (*end == 0)
+ return 1;
+
+ while (ptr < end) {
+ if (*ptr == '-' || *ptr == '+' || *ptr == '.' || nsvg__isdigit(*ptr)) {
+ if (*na >= maxNa) return 0;
+ ptr = nsvg__parseNumber(ptr, it, 64);
+ args[(*na)++] = (float)nsvg__atof(it);
+ } else {
+ ++ptr;
+ }
+ }
+ return (int)(end - str);
+}
+
+
+static int nsvg__parseMatrix(float* xform, const char* str)
+{
+ float t[6];
+ int na = 0;
+ int len = nsvg__parseTransformArgs(str, t, 6, &na);
+ if (na != 6) return len;
+ memcpy(xform, t, sizeof(float)*6);
+ return len;
+}
+
+static int nsvg__parseTranslate(float* xform, const char* str)
+{
+ float args[2];
+ float t[6];
+ int na = 0;
+ int len = nsvg__parseTransformArgs(str, args, 2, &na);
+ if (na == 1) args[1] = 0.0;
+
+ nsvg__xformSetTranslation(t, args[0], args[1]);
+ memcpy(xform, t, sizeof(float)*6);
+ return len;
+}
+
+static int nsvg__parseScale(float* xform, const char* str)
+{
+ float args[2];
+ int na = 0;
+ float t[6];
+ int len = nsvg__parseTransformArgs(str, args, 2, &na);
+ if (na == 1) args[1] = args[0];
+ nsvg__xformSetScale(t, args[0], args[1]);
+ memcpy(xform, t, sizeof(float)*6);
+ return len;
+}
+
+static int nsvg__parseSkewX(float* xform, const char* str)
+{
+ float args[1];
+ int na = 0;
+ float t[6];
+ int len = nsvg__parseTransformArgs(str, args, 1, &na);
+ nsvg__xformSetSkewX(t, args[0]/180.0f*NSVG_PI);
+ memcpy(xform, t, sizeof(float)*6);
+ return len;
+}
+
+static int nsvg__parseSkewY(float* xform, const char* str)
+{
+ float args[1];
+ int na = 0;
+ float t[6];
+ int len = nsvg__parseTransformArgs(str, args, 1, &na);
+ nsvg__xformSetSkewY(t, args[0]/180.0f*NSVG_PI);
+ memcpy(xform, t, sizeof(float)*6);
+ return len;
+}
+
+static int nsvg__parseRotate(float* xform, const char* str)
+{
+ float args[3];
+ int na = 0;
+ float m[6];
+ float t[6];
+ int len = nsvg__parseTransformArgs(str, args, 3, &na);
+ if (na == 1)
+ args[1] = args[2] = 0.0f;
+ nsvg__xformIdentity(m);
+
+ if (na > 1) {
+ nsvg__xformSetTranslation(t, -args[1], -args[2]);
+ nsvg__xformMultiply(m, t);
+ }
+
+ nsvg__xformSetRotation(t, args[0]/180.0f*NSVG_PI);
+ nsvg__xformMultiply(m, t);
+
+ if (na > 1) {
+ nsvg__xformSetTranslation(t, args[1], args[2]);
+ nsvg__xformMultiply(m, t);
+ }
+
+ memcpy(xform, m, sizeof(float)*6);
+
+ return len;
+}
+
+static void nsvg__parseTransform(float* xform, const char* str)
+{
+ float t[6];
+ int len;
+ nsvg__xformIdentity(xform);
+ while (*str)
+ {
+ if (strncmp(str, "matrix", 6) == 0)
+ len = nsvg__parseMatrix(t, str);
+ else if (strncmp(str, "translate", 9) == 0)
+ len = nsvg__parseTranslate(t, str);
+ else if (strncmp(str, "scale", 5) == 0)
+ len = nsvg__parseScale(t, str);
+ else if (strncmp(str, "rotate", 6) == 0)
+ len = nsvg__parseRotate(t, str);
+ else if (strncmp(str, "skewX", 5) == 0)
+ len = nsvg__parseSkewX(t, str);
+ else if (strncmp(str, "skewY", 5) == 0)
+ len = nsvg__parseSkewY(t, str);
+ else{
+ ++str;
+ continue;
+ }
+ if (len != 0) {
+ str += len;
+ } else {
+ ++str;
+ continue;
+ }
+
+ nsvg__xformPremultiply(xform, t);
+ }
+}
+
+static void nsvg__parseUrl(char* id, const char* str)
+{
+ int i = 0;
+ str += 4; // "url(";
+ if (*str && *str == '#')
+ str++;
+ while (i < 63 && *str && *str != ')') {
+ id[i] = *str++;
+ i++;
+ }
+ id[i] = '\0';
+}
+
+static char nsvg__parseLineCap(const char* str)
+{
+ if (strcmp(str, "butt") == 0)
+ return NSVG_CAP_BUTT;
+ else if (strcmp(str, "round") == 0)
+ return NSVG_CAP_ROUND;
+ else if (strcmp(str, "square") == 0)
+ return NSVG_CAP_SQUARE;
+ // TODO: handle inherit.
+ return NSVG_CAP_BUTT;
+}
+
+static char nsvg__parseLineJoin(const char* str)
+{
+ if (strcmp(str, "miter") == 0)
+ return NSVG_JOIN_MITER;
+ else if (strcmp(str, "round") == 0)
+ return NSVG_JOIN_ROUND;
+ else if (strcmp(str, "bevel") == 0)
+ return NSVG_JOIN_BEVEL;
+ // TODO: handle inherit.
+ return NSVG_JOIN_MITER;
+}
+
+static char nsvg__parseFillRule(const char* str)
+{
+ if (strcmp(str, "nonzero") == 0)
+ return NSVG_FILLRULE_NONZERO;
+ else if (strcmp(str, "evenodd") == 0)
+ return NSVG_FILLRULE_EVENODD;
+ // TODO: handle inherit.
+ return NSVG_FILLRULE_NONZERO;
+}
+
+static const char* nsvg__getNextDashItem(const char* s, char* it)
+{
+ int n = 0;
+ it[0] = '\0';
+ // Skip white spaces and commas
+ while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
+ // Advance until whitespace, comma or end.
+ while (*s && (!nsvg__isspace(*s) && *s != ',')) {
+ if (n < 63)
+ it[n++] = *s;
+ s++;
+ }
+ it[n++] = '\0';
+ return s;
+}
+
+static int nsvg__parseStrokeDashArray(NSVGparser* p, const char* str, float* strokeDashArray)
+{
+ char item[64];
+ int count = 0, i;
+ float sum = 0.0f;
+
+ // Handle "none"
+ if (str[0] == 'n')
+ return 0;
+
+ // Parse dashes
+ while (*str) {
+ str = nsvg__getNextDashItem(str, item);
+ if (!*item) break;
+ if (count < NSVG_MAX_DASHES)
+ strokeDashArray[count++] = fabsf(nsvg__parseCoordinate(p, item, 0.0f, nsvg__actualLength(p)));
+ }
+
+ for (i = 0; i < count; i++)
+ sum += strokeDashArray[i];
+ if (sum <= 1e-6f)
+ count = 0;
+
+ return count;
+}
+
+static void nsvg__parseStyle(NSVGparser* p, const char* str);
+
+static int nsvg__parseAttr(NSVGparser* p, const char* name, const char* value)
+{
+ float xform[6];
+ NSVGattrib* attr = nsvg__getAttr(p);
+ if (!attr) return 0;
+
+ if (strcmp(name, "style") == 0) {
+ nsvg__parseStyle(p, value);
+ } else if (strcmp(name, "display") == 0) {
+ if (strcmp(value, "none") == 0)
+ attr->visible = 0;
+ // Don't reset ->visible on display:inline, one display:none hides the whole subtree
+
+ } else if (strcmp(name, "fill") == 0) {
+ if (strcmp(value, "none") == 0) {
+ attr->hasFill = 0;
+ } else if (strncmp(value, "url(", 4) == 0) {
+ attr->hasFill = 2;
+ nsvg__parseUrl(attr->fillGradient, value);
+ } else {
+ attr->hasFill = 1;
+ attr->fillColor = nsvg__parseColor(value);
+ }
+ } else if (strcmp(name, "opacity") == 0) {
+ attr->opacity = nsvg__parseOpacity(value);
+ } else if (strcmp(name, "fill-opacity") == 0) {
+ attr->fillOpacity = nsvg__parseOpacity(value);
+ } else if (strcmp(name, "stroke") == 0) {
+ if (strcmp(value, "none") == 0) {
+ attr->hasStroke = 0;
+ } else if (strncmp(value, "url(", 4) == 0) {
+ attr->hasStroke = 2;
+ nsvg__parseUrl(attr->strokeGradient, value);
+ } else {
+ attr->hasStroke = 1;
+ attr->strokeColor = nsvg__parseColor(value);
+ }
+ } else if (strcmp(name, "stroke-width") == 0) {
+ attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
+ } else if (strcmp(name, "stroke-dasharray") == 0) {
+ attr->strokeDashCount = nsvg__parseStrokeDashArray(p, value, attr->strokeDashArray);
+ } else if (strcmp(name, "stroke-dashoffset") == 0) {
+ attr->strokeDashOffset = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
+ } else if (strcmp(name, "stroke-opacity") == 0) {
+ attr->strokeOpacity = nsvg__parseOpacity(value);
+ } else if (strcmp(name, "stroke-linecap") == 0) {
+ attr->strokeLineCap = nsvg__parseLineCap(value);
+ } else if (strcmp(name, "stroke-linejoin") == 0) {
+ attr->strokeLineJoin = nsvg__parseLineJoin(value);
+ } else if (strcmp(name, "stroke-miterlimit") == 0) {
+ attr->miterLimit = nsvg__parseMiterLimit(value);
+ } else if (strcmp(name, "fill-rule") == 0) {
+ attr->fillRule = nsvg__parseFillRule(value);
+ } else if (strcmp(name, "font-size") == 0) {
+ attr->fontSize = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
+ } else if (strcmp(name, "transform") == 0) {
+ nsvg__parseTransform(xform, value);
+ nsvg__xformPremultiply(attr->xform, xform);
+ } else if (strcmp(name, "stop-color") == 0) {
+ attr->stopColor = nsvg__parseColor(value);
+ } else if (strcmp(name, "stop-opacity") == 0) {
+ attr->stopOpacity = nsvg__parseOpacity(value);
+ } else if (strcmp(name, "offset") == 0) {
+ attr->stopOffset = nsvg__parseCoordinate(p, value, 0.0f, 1.0f);
+ } else if (strcmp(name, "id") == 0) {
+ strncpy(attr->id, value, 63);
+ attr->id[63] = '\0';
+ } else {
+ return 0;
+ }
+ return 1;
+}
+
+static int nsvg__parseNameValue(NSVGparser* p, const char* start, const char* end)
+{
+ const char* str;
+ const char* val;
+ char name[512];
+ char value[512];
+ int n;
+
+ str = start;
+ while (str < end && *str != ':') ++str;
+
+ val = str;
+
+ // Right Trim
+ while (str > start && (*str == ':' || nsvg__isspace(*str))) --str;
+ ++str;
+
+ n = (int)(str - start);
+ if (n > 511) n = 511;
+ if (n) memcpy(name, start, n);
+ name[n] = 0;
+
+ while (val < end && (*val == ':' || nsvg__isspace(*val))) ++val;
+
+ n = (int)(end - val);
+ if (n > 511) n = 511;
+ if (n) memcpy(value, val, n);
+ value[n] = 0;
+
+ return nsvg__parseAttr(p, name, value);
+}
+
+static void nsvg__parseStyle(NSVGparser* p, const char* str)
+{
+ const char* start;
+ const char* end;
+
+ while (*str) {
+ // Left Trim
+ while(*str && nsvg__isspace(*str)) ++str;
+ start = str;
+ while(*str && *str != ';') ++str;
+ end = str;
+
+ // Right Trim
+ while (end > start && (*end == ';' || nsvg__isspace(*end))) --end;
+ ++end;
+
+ nsvg__parseNameValue(p, start, end);
+ if (*str) ++str;
+ }
+}
+
+static void nsvg__parseAttribs(NSVGparser* p, const char** attr)
+{
+ int i;
+ for (i = 0; attr[i]; i += 2)
+ {
+ if (strcmp(attr[i], "style") == 0)
+ nsvg__parseStyle(p, attr[i + 1]);
+ else
+ nsvg__parseAttr(p, attr[i], attr[i + 1]);
+ }
+}
+
+static int nsvg__getArgsPerElement(char cmd)
+{
+ switch (cmd) {
+ case 'v':
+ case 'V':
+ case 'h':
+ case 'H':
+ return 1;
+ case 'm':
+ case 'M':
+ case 'l':
+ case 'L':
+ case 't':
+ case 'T':
+ return 2;
+ case 'q':
+ case 'Q':
+ case 's':
+ case 'S':
+ return 4;
+ case 'c':
+ case 'C':
+ return 6;
+ case 'a':
+ case 'A':
+ return 7;
+ case 'z':
+ case 'Z':
+ return 0;
+ }
+ return -1;
+}
+
+static void nsvg__pathMoveTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
+{
+ if (rel) {
+ *cpx += args[0];
+ *cpy += args[1];
+ } else {
+ *cpx = args[0];
+ *cpy = args[1];
+ }
+ nsvg__moveTo(p, *cpx, *cpy);
+}
+
+static void nsvg__pathLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
+{
+ if (rel) {
+ *cpx += args[0];
+ *cpy += args[1];
+ } else {
+ *cpx = args[0];
+ *cpy = args[1];
+ }
+ nsvg__lineTo(p, *cpx, *cpy);
+}
+
+static void nsvg__pathHLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
+{
+ if (rel)
+ *cpx += args[0];
+ else
+ *cpx = args[0];
+ nsvg__lineTo(p, *cpx, *cpy);
+}
+
+static void nsvg__pathVLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
+{
+ if (rel)
+ *cpy += args[0];
+ else
+ *cpy = args[0];
+ nsvg__lineTo(p, *cpx, *cpy);
+}
+
+static void nsvg__pathCubicBezTo(NSVGparser* p, float* cpx, float* cpy,
+ float* cpx2, float* cpy2, float* args, int rel)
+{
+ float x2, y2, cx1, cy1, cx2, cy2;
+
+ if (rel) {
+ cx1 = *cpx + args[0];
+ cy1 = *cpy + args[1];
+ cx2 = *cpx + args[2];
+ cy2 = *cpy + args[3];
+ x2 = *cpx + args[4];
+ y2 = *cpy + args[5];
+ } else {
+ cx1 = args[0];
+ cy1 = args[1];
+ cx2 = args[2];
+ cy2 = args[3];
+ x2 = args[4];
+ y2 = args[5];
+ }
+
+ nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
+
+ *cpx2 = cx2;
+ *cpy2 = cy2;
+ *cpx = x2;
+ *cpy = y2;
+}
+
+static void nsvg__pathCubicBezShortTo(NSVGparser* p, float* cpx, float* cpy,
+ float* cpx2, float* cpy2, float* args, int rel)
+{
+ float x1, y1, x2, y2, cx1, cy1, cx2, cy2;
+
+ x1 = *cpx;
+ y1 = *cpy;
+ if (rel) {
+ cx2 = *cpx + args[0];
+ cy2 = *cpy + args[1];
+ x2 = *cpx + args[2];
+ y2 = *cpy + args[3];
+ } else {
+ cx2 = args[0];
+ cy2 = args[1];
+ x2 = args[2];
+ y2 = args[3];
+ }
+
+ cx1 = 2*x1 - *cpx2;
+ cy1 = 2*y1 - *cpy2;
+
+ nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
+
+ *cpx2 = cx2;
+ *cpy2 = cy2;
+ *cpx = x2;
+ *cpy = y2;
+}
+
+static void nsvg__pathQuadBezTo(NSVGparser* p, float* cpx, float* cpy,
+ float* cpx2, float* cpy2, float* args, int rel)
+{
+ float x1, y1, x2, y2, cx, cy;
+ float cx1, cy1, cx2, cy2;
+
+ x1 = *cpx;
+ y1 = *cpy;
+ if (rel) {
+ cx = *cpx + args[0];
+ cy = *cpy + args[1];
+ x2 = *cpx + args[2];
+ y2 = *cpy + args[3];
+ } else {
+ cx = args[0];
+ cy = args[1];
+ x2 = args[2];
+ y2 = args[3];
+ }
+
+ // Convert to cubic bezier
+ cx1 = x1 + 2.0f/3.0f*(cx - x1);
+ cy1 = y1 + 2.0f/3.0f*(cy - y1);
+ cx2 = x2 + 2.0f/3.0f*(cx - x2);
+ cy2 = y2 + 2.0f/3.0f*(cy - y2);
+
+ nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
+
+ *cpx2 = cx;
+ *cpy2 = cy;
+ *cpx = x2;
+ *cpy = y2;
+}
+
+static void nsvg__pathQuadBezShortTo(NSVGparser* p, float* cpx, float* cpy,
+ float* cpx2, float* cpy2, float* args, int rel)
+{
+ float x1, y1, x2, y2, cx, cy;
+ float cx1, cy1, cx2, cy2;
+
+ x1 = *cpx;
+ y1 = *cpy;
+ if (rel) {
+ x2 = *cpx + args[0];
+ y2 = *cpy + args[1];
+ } else {
+ x2 = args[0];
+ y2 = args[1];
+ }
+
+ cx = 2*x1 - *cpx2;
+ cy = 2*y1 - *cpy2;
+
+ // Convert to cubix bezier
+ cx1 = x1 + 2.0f/3.0f*(cx - x1);
+ cy1 = y1 + 2.0f/3.0f*(cy - y1);
+ cx2 = x2 + 2.0f/3.0f*(cx - x2);
+ cy2 = y2 + 2.0f/3.0f*(cy - y2);
+
+ nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
+
+ *cpx2 = cx;
+ *cpy2 = cy;
+ *cpx = x2;
+ *cpy = y2;
+}
+
+static float nsvg__sqr(float x) { return x*x; }
+static float nsvg__vmag(float x, float y) { return sqrtf(x*x + y*y); }
+
+static float nsvg__vecrat(float ux, float uy, float vx, float vy)
+{
+ return (ux*vx + uy*vy) / (nsvg__vmag(ux,uy) * nsvg__vmag(vx,vy));
+}
+
+static float nsvg__vecang(float ux, float uy, float vx, float vy)
+{
+ float r = nsvg__vecrat(ux,uy, vx,vy);
+ if (r < -1.0f) r = -1.0f;
+ if (r > 1.0f) r = 1.0f;
+ return ((ux*vy < uy*vx) ? -1.0f : 1.0f) * acosf(r);
+}
+
+static void nsvg__pathArcTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
+{
+ // Ported from canvg (https://code.google.com/p/canvg/)
+ float rx, ry, rotx;
+ float x1, y1, x2, y2, cx, cy, dx, dy, d;
+ float x1p, y1p, cxp, cyp, s, sa, sb;
+ float ux, uy, vx, vy, a1, da;
+ float x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6];
+ float sinrx, cosrx;
+ int fa, fs;
+ int i, ndivs;
+ float hda, kappa;
+
+ rx = fabsf(args[0]); // y radius
+ ry = fabsf(args[1]); // x radius
+ rotx = args[2] / 180.0f * NSVG_PI; // x rotation angle
+ fa = fabsf(args[3]) > 1e-6 ? 1 : 0; // Large arc
+ fs = fabsf(args[4]) > 1e-6 ? 1 : 0; // Sweep direction
+ x1 = *cpx; // start point
+ y1 = *cpy;
+ if (rel) { // end point
+ x2 = *cpx + args[5];
+ y2 = *cpy + args[6];
+ } else {
+ x2 = args[5];
+ y2 = args[6];
+ }
+
+ dx = x1 - x2;
+ dy = y1 - y2;
+ d = sqrtf(dx*dx + dy*dy);
+ if (d < 1e-6f || rx < 1e-6f || ry < 1e-6f) {
+ // The arc degenerates to a line
+ nsvg__lineTo(p, x2, y2);
+ *cpx = x2;
+ *cpy = y2;
+ return;
+ }
+
+ sinrx = sinf(rotx);
+ cosrx = cosf(rotx);
+
+ // Convert to center point parameterization.
+ // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
+ // 1) Compute x1', y1'
+ x1p = cosrx * dx / 2.0f + sinrx * dy / 2.0f;
+ y1p = -sinrx * dx / 2.0f + cosrx * dy / 2.0f;
+ d = nsvg__sqr(x1p)/nsvg__sqr(rx) + nsvg__sqr(y1p)/nsvg__sqr(ry);
+ if (d > 1) {
+ d = sqrtf(d);
+ rx *= d;
+ ry *= d;
+ }
+ // 2) Compute cx', cy'
+ s = 0.0f;
+ sa = nsvg__sqr(rx)*nsvg__sqr(ry) - nsvg__sqr(rx)*nsvg__sqr(y1p) - nsvg__sqr(ry)*nsvg__sqr(x1p);
+ sb = nsvg__sqr(rx)*nsvg__sqr(y1p) + nsvg__sqr(ry)*nsvg__sqr(x1p);
+ if (sa < 0.0f) sa = 0.0f;
+ if (sb > 0.0f)
+ s = sqrtf(sa / sb);
+ if (fa == fs)
+ s = -s;
+ cxp = s * rx * y1p / ry;
+ cyp = s * -ry * x1p / rx;
+
+ // 3) Compute cx,cy from cx',cy'
+ cx = (x1 + x2)/2.0f + cosrx*cxp - sinrx*cyp;
+ cy = (y1 + y2)/2.0f + sinrx*cxp + cosrx*cyp;
+
+ // 4) Calculate theta1, and delta theta.
+ ux = (x1p - cxp) / rx;
+ uy = (y1p - cyp) / ry;
+ vx = (-x1p - cxp) / rx;
+ vy = (-y1p - cyp) / ry;
+ a1 = nsvg__vecang(1.0f,0.0f, ux,uy); // Initial angle
+ da = nsvg__vecang(ux,uy, vx,vy); // Delta angle
+
+// if (vecrat(ux,uy,vx,vy) <= -1.0f) da = NSVG_PI;
+// if (vecrat(ux,uy,vx,vy) >= 1.0f) da = 0;
+
+ if (fs == 0 && da > 0)
+ da -= 2 * NSVG_PI;
+ else if (fs == 1 && da < 0)
+ da += 2 * NSVG_PI;
+
+ // Approximate the arc using cubic spline segments.
+ t[0] = cosrx; t[1] = sinrx;
+ t[2] = -sinrx; t[3] = cosrx;
+ t[4] = cx; t[5] = cy;
+
+ // Split arc into max 90 degree segments.
+ // The loop assumes an iteration per end point (including start and end), this +1.
+ ndivs = (int)(fabsf(da) / (NSVG_PI*0.5f) + 1.0f);
+ hda = (da / (float)ndivs) / 2.0f;
+ // Fix for ticket #179: division by 0: avoid cotangens around 0 (infinite)
+ if ((hda < 1e-3f) && (hda > -1e-3f))
+ hda *= 0.5f;
+ else
+ hda = (1.0f - cosf(hda)) / sinf(hda);
+ kappa = fabsf(4.0f / 3.0f * hda);
+ if (da < 0.0f)
+ kappa = -kappa;
+
+ for (i = 0; i <= ndivs; i++) {
+ a = a1 + da * ((float)i/(float)ndivs);
+ dx = cosf(a);
+ dy = sinf(a);
+ nsvg__xformPoint(&x, &y, dx*rx, dy*ry, t); // position
+ nsvg__xformVec(&tanx, &tany, -dy*rx * kappa, dx*ry * kappa, t); // tangent
+ if (i > 0)
+ nsvg__cubicBezTo(p, px+ptanx,py+ptany, x-tanx, y-tany, x, y);
+ px = x;
+ py = y;
+ ptanx = tanx;
+ ptany = tany;
+ }
+
+ *cpx = x2;
+ *cpy = y2;
+}
+
+static void nsvg__parsePath(NSVGparser* p, const char** attr)
+{
+ const char* s = NULL;
+ char cmd = '\0';
+ float args[10];
+ int nargs;
+ int rargs = 0;
+ char initPoint;
+ float cpx, cpy, cpx2, cpy2;
+ const char* tmp[4];
+ char closedFlag;
+ int i;
+ char item[64];
+
+ for (i = 0; attr[i]; i += 2) {
+ if (strcmp(attr[i], "d") == 0) {
+ s = attr[i + 1];
+ } else {
+ tmp[0] = attr[i];
+ tmp[1] = attr[i + 1];
+ tmp[2] = 0;
+ tmp[3] = 0;
+ nsvg__parseAttribs(p, tmp);
+ }
+ }
+
+ if (s) {
+ nsvg__resetPath(p);
+ cpx = 0; cpy = 0;
+ cpx2 = 0; cpy2 = 0;
+ initPoint = 0;
+ closedFlag = 0;
+ nargs = 0;
+
+ while (*s) {
+ item[0] = '\0';
+ if ((cmd == 'A' || cmd == 'a') && (nargs == 3 || nargs == 4))
+ s = nsvg__getNextPathItemWhenArcFlag(s, item);
+ if (!*item)
+ s = nsvg__getNextPathItem(s, item);
+ if (!*item) break;
+ if (cmd != '\0' && nsvg__isCoordinate(item)) {
+ if (nargs < 10)
+ args[nargs++] = (float)nsvg__atof(item);
+ if (nargs >= rargs) {
+ switch (cmd) {
+ case 'm':
+ case 'M':
+ nsvg__pathMoveTo(p, &cpx, &cpy, args, cmd == 'm' ? 1 : 0);
+ // Moveto can be followed by multiple coordinate pairs,
+ // which should be treated as linetos.
+ cmd = (cmd == 'm') ? 'l' : 'L';
+ rargs = nsvg__getArgsPerElement(cmd);
+ cpx2 = cpx; cpy2 = cpy;
+ initPoint = 1;
+ break;
+ case 'l':
+ case 'L':
+ nsvg__pathLineTo(p, &cpx, &cpy, args, cmd == 'l' ? 1 : 0);
+ cpx2 = cpx; cpy2 = cpy;
+ break;
+ case 'H':
+ case 'h':
+ nsvg__pathHLineTo(p, &cpx, &cpy, args, cmd == 'h' ? 1 : 0);
+ cpx2 = cpx; cpy2 = cpy;
+ break;
+ case 'V':
+ case 'v':
+ nsvg__pathVLineTo(p, &cpx, &cpy, args, cmd == 'v' ? 1 : 0);
+ cpx2 = cpx; cpy2 = cpy;
+ break;
+ case 'C':
+ case 'c':
+ nsvg__pathCubicBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'c' ? 1 : 0);
+ break;
+ case 'S':
+ case 's':
+ nsvg__pathCubicBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 's' ? 1 : 0);
+ break;
+ case 'Q':
+ case 'q':
+ nsvg__pathQuadBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'q' ? 1 : 0);
+ break;
+ case 'T':
+ case 't':
+ nsvg__pathQuadBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 't' ? 1 : 0);
+ break;
+ case 'A':
+ case 'a':
+ nsvg__pathArcTo(p, &cpx, &cpy, args, cmd == 'a' ? 1 : 0);
+ cpx2 = cpx; cpy2 = cpy;
+ break;
+ default:
+ if (nargs >= 2) {
+ cpx = args[nargs-2];
+ cpy = args[nargs-1];
+ cpx2 = cpx; cpy2 = cpy;
+ }
+ break;
+ }
+ nargs = 0;
+ }
+ } else {
+ cmd = item[0];
+ if (cmd == 'M' || cmd == 'm') {
+ // Commit path.
+ if (p->npts > 0)
+ nsvg__addPath(p, closedFlag);
+ // Start new subpath.
+ nsvg__resetPath(p);
+ closedFlag = 0;
+ nargs = 0;
+ } else if (initPoint == 0) {
+ // Do not allow other commands until initial point has been set (moveTo called once).
+ cmd = '\0';
+ }
+ if (cmd == 'Z' || cmd == 'z') {
+ closedFlag = 1;
+ // Commit path.
+ if (p->npts > 0) {
+ // Move current point to first point
+ cpx = p->pts[0];
+ cpy = p->pts[1];
+ cpx2 = cpx; cpy2 = cpy;
+ nsvg__addPath(p, closedFlag);
+ }
+ // Start new subpath.
+ nsvg__resetPath(p);
+ nsvg__moveTo(p, cpx, cpy);
+ closedFlag = 0;
+ nargs = 0;
+ }
+ rargs = nsvg__getArgsPerElement(cmd);
+ if (rargs == -1) {
+ // Command not recognized
+ cmd = '\0';
+ rargs = 0;
+ }
+ }
+ }
+ // Commit path.
+ if (p->npts)
+ nsvg__addPath(p, closedFlag);
+ }
+
+ nsvg__addShape(p);
+}
+
+static void nsvg__parseRect(NSVGparser* p, const char** attr)
+{
+ float x = 0.0f;
+ float y = 0.0f;
+ float w = 0.0f;
+ float h = 0.0f;
+ float rx = -1.0f; // marks not set
+ float ry = -1.0f;
+ int i;
+
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "x") == 0) x = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
+ if (strcmp(attr[i], "y") == 0) y = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
+ if (strcmp(attr[i], "width") == 0) w = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p));
+ if (strcmp(attr[i], "height") == 0) h = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p));
+ if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
+ if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
+ }
+ }
+
+ if (rx < 0.0f && ry > 0.0f) rx = ry;
+ if (ry < 0.0f && rx > 0.0f) ry = rx;
+ if (rx < 0.0f) rx = 0.0f;
+ if (ry < 0.0f) ry = 0.0f;
+ if (rx > w/2.0f) rx = w/2.0f;
+ if (ry > h/2.0f) ry = h/2.0f;
+
+ if (w != 0.0f && h != 0.0f) {
+ nsvg__resetPath(p);
+
+ if (rx < 0.00001f || ry < 0.0001f) {
+ nsvg__moveTo(p, x, y);
+ nsvg__lineTo(p, x+w, y);
+ nsvg__lineTo(p, x+w, y+h);
+ nsvg__lineTo(p, x, y+h);
+ } else {
+ // Rounded rectangle
+ nsvg__moveTo(p, x+rx, y);
+ nsvg__lineTo(p, x+w-rx, y);
+ nsvg__cubicBezTo(p, x+w-rx*(1-NSVG_KAPPA90), y, x+w, y+ry*(1-NSVG_KAPPA90), x+w, y+ry);
+ nsvg__lineTo(p, x+w, y+h-ry);
+ nsvg__cubicBezTo(p, x+w, y+h-ry*(1-NSVG_KAPPA90), x+w-rx*(1-NSVG_KAPPA90), y+h, x+w-rx, y+h);
+ nsvg__lineTo(p, x+rx, y+h);
+ nsvg__cubicBezTo(p, x+rx*(1-NSVG_KAPPA90), y+h, x, y+h-ry*(1-NSVG_KAPPA90), x, y+h-ry);
+ nsvg__lineTo(p, x, y+ry);
+ nsvg__cubicBezTo(p, x, y+ry*(1-NSVG_KAPPA90), x+rx*(1-NSVG_KAPPA90), y, x+rx, y);
+ }
+
+ nsvg__addPath(p, 1);
+
+ nsvg__addShape(p);
+ }
+}
+
+static void nsvg__parseCircle(NSVGparser* p, const char** attr)
+{
+ float cx = 0.0f;
+ float cy = 0.0f;
+ float r = 0.0f;
+ int i;
+
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
+ if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
+ if (strcmp(attr[i], "r") == 0) r = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualLength(p)));
+ }
+ }
+
+ if (r > 0.0f) {
+ nsvg__resetPath(p);
+
+ nsvg__moveTo(p, cx+r, cy);
+ nsvg__cubicBezTo(p, cx+r, cy+r*NSVG_KAPPA90, cx+r*NSVG_KAPPA90, cy+r, cx, cy+r);
+ nsvg__cubicBezTo(p, cx-r*NSVG_KAPPA90, cy+r, cx-r, cy+r*NSVG_KAPPA90, cx-r, cy);
+ nsvg__cubicBezTo(p, cx-r, cy-r*NSVG_KAPPA90, cx-r*NSVG_KAPPA90, cy-r, cx, cy-r);
+ nsvg__cubicBezTo(p, cx+r*NSVG_KAPPA90, cy-r, cx+r, cy-r*NSVG_KAPPA90, cx+r, cy);
+
+ nsvg__addPath(p, 1);
+
+ nsvg__addShape(p);
+ }
+}
+
+static void nsvg__parseEllipse(NSVGparser* p, const char** attr)
+{
+ float cx = 0.0f;
+ float cy = 0.0f;
+ float rx = 0.0f;
+ float ry = 0.0f;
+ int i;
+
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
+ if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
+ if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
+ if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
+ }
+ }
+
+ if (rx > 0.0f && ry > 0.0f) {
+
+ nsvg__resetPath(p);
+
+ nsvg__moveTo(p, cx+rx, cy);
+ nsvg__cubicBezTo(p, cx+rx, cy+ry*NSVG_KAPPA90, cx+rx*NSVG_KAPPA90, cy+ry, cx, cy+ry);
+ nsvg__cubicBezTo(p, cx-rx*NSVG_KAPPA90, cy+ry, cx-rx, cy+ry*NSVG_KAPPA90, cx-rx, cy);
+ nsvg__cubicBezTo(p, cx-rx, cy-ry*NSVG_KAPPA90, cx-rx*NSVG_KAPPA90, cy-ry, cx, cy-ry);
+ nsvg__cubicBezTo(p, cx+rx*NSVG_KAPPA90, cy-ry, cx+rx, cy-ry*NSVG_KAPPA90, cx+rx, cy);
+
+ nsvg__addPath(p, 1);
+
+ nsvg__addShape(p);
+ }
+}
+
+static void nsvg__parseLine(NSVGparser* p, const char** attr)
+{
+ float x1 = 0.0;
+ float y1 = 0.0;
+ float x2 = 0.0;
+ float y2 = 0.0;
+ int i;
+
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "x1") == 0) x1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
+ if (strcmp(attr[i], "y1") == 0) y1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
+ if (strcmp(attr[i], "x2") == 0) x2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
+ if (strcmp(attr[i], "y2") == 0) y2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
+ }
+ }
+
+ nsvg__resetPath(p);
+
+ nsvg__moveTo(p, x1, y1);
+ nsvg__lineTo(p, x2, y2);
+
+ nsvg__addPath(p, 0);
+
+ nsvg__addShape(p);
+}
+
+static void nsvg__parsePoly(NSVGparser* p, const char** attr, int closeFlag)
+{
+ int i;
+ const char* s;
+ float args[2];
+ int nargs, npts = 0;
+ char item[64];
+
+ nsvg__resetPath(p);
+
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "points") == 0) {
+ s = attr[i + 1];
+ nargs = 0;
+ while (*s) {
+ s = nsvg__getNextPathItem(s, item);
+ args[nargs++] = (float)nsvg__atof(item);
+ if (nargs >= 2) {
+ if (npts == 0)
+ nsvg__moveTo(p, args[0], args[1]);
+ else
+ nsvg__lineTo(p, args[0], args[1]);
+ nargs = 0;
+ npts++;
+ }
+ }
+ }
+ }
+ }
+
+ nsvg__addPath(p, (char)closeFlag);
+
+ nsvg__addShape(p);
+}
+
+static void nsvg__parseSVG(NSVGparser* p, const char** attr)
+{
+ int i;
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "width") == 0) {
+ p->image->width = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
+ } else if (strcmp(attr[i], "height") == 0) {
+ p->image->height = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
+ } else if (strcmp(attr[i], "viewBox") == 0) {
+ const char *s = attr[i + 1];
+ char buf[64];
+ s = nsvg__parseNumber(s, buf, 64);
+ p->viewMinx = nsvg__atof(buf);
+ while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
+ if (!*s) return;
+ s = nsvg__parseNumber(s, buf, 64);
+ p->viewMiny = nsvg__atof(buf);
+ while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
+ if (!*s) return;
+ s = nsvg__parseNumber(s, buf, 64);
+ p->viewWidth = nsvg__atof(buf);
+ while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
+ if (!*s) return;
+ s = nsvg__parseNumber(s, buf, 64);
+ p->viewHeight = nsvg__atof(buf);
+ } else if (strcmp(attr[i], "preserveAspectRatio") == 0) {
+ if (strstr(attr[i + 1], "none") != 0) {
+ // No uniform scaling
+ p->alignType = NSVG_ALIGN_NONE;
+ } else {
+ // Parse X align
+ if (strstr(attr[i + 1], "xMin") != 0)
+ p->alignX = NSVG_ALIGN_MIN;
+ else if (strstr(attr[i + 1], "xMid") != 0)
+ p->alignX = NSVG_ALIGN_MID;
+ else if (strstr(attr[i + 1], "xMax") != 0)
+ p->alignX = NSVG_ALIGN_MAX;
+ // Parse X align
+ if (strstr(attr[i + 1], "yMin") != 0)
+ p->alignY = NSVG_ALIGN_MIN;
+ else if (strstr(attr[i + 1], "yMid") != 0)
+ p->alignY = NSVG_ALIGN_MID;
+ else if (strstr(attr[i + 1], "yMax") != 0)
+ p->alignY = NSVG_ALIGN_MAX;
+ // Parse meet/slice
+ p->alignType = NSVG_ALIGN_MEET;
+ if (strstr(attr[i + 1], "slice") != 0)
+ p->alignType = NSVG_ALIGN_SLICE;
+ }
+ }
+ }
+ }
+}
+
+static void nsvg__parseGradient(NSVGparser* p, const char** attr, signed char type)
+{
+ int i;
+ NSVGgradientData* grad = (NSVGgradientData*)malloc(sizeof(NSVGgradientData));
+ if (grad == NULL) return;
+ memset(grad, 0, sizeof(NSVGgradientData));
+ grad->units = NSVG_OBJECT_SPACE;
+ grad->type = type;
+ if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) {
+ grad->linear.x1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
+ grad->linear.y1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
+ grad->linear.x2 = nsvg__coord(100.0f, NSVG_UNITS_PERCENT);
+ grad->linear.y2 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
+ } else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) {
+ grad->radial.cx = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
+ grad->radial.cy = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
+ grad->radial.r = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
+ }
+
+ nsvg__xformIdentity(grad->xform);
+
+ for (i = 0; attr[i]; i += 2) {
+ if (strcmp(attr[i], "id") == 0) {
+ strncpy(grad->id, attr[i+1], 63);
+ grad->id[63] = '\0';
+ } else if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "gradientUnits") == 0) {
+ if (strcmp(attr[i+1], "objectBoundingBox") == 0)
+ grad->units = NSVG_OBJECT_SPACE;
+ else
+ grad->units = NSVG_USER_SPACE;
+ } else if (strcmp(attr[i], "gradientTransform") == 0) {
+ nsvg__parseTransform(grad->xform, attr[i + 1]);
+ } else if (strcmp(attr[i], "cx") == 0) {
+ grad->radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "cy") == 0) {
+ grad->radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "r") == 0) {
+ grad->radial.r = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "fx") == 0) {
+ grad->radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "fy") == 0) {
+ grad->radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "x1") == 0) {
+ grad->linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "y1") == 0) {
+ grad->linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "x2") == 0) {
+ grad->linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "y2") == 0) {
+ grad->linear.y2 = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "spreadMethod") == 0) {
+ if (strcmp(attr[i+1], "pad") == 0)
+ grad->spread = NSVG_SPREAD_PAD;
+ else if (strcmp(attr[i+1], "reflect") == 0)
+ grad->spread = NSVG_SPREAD_REFLECT;
+ else if (strcmp(attr[i+1], "repeat") == 0)
+ grad->spread = NSVG_SPREAD_REPEAT;
+ } else if (strcmp(attr[i], "xlink:href") == 0) {
+ const char *href = attr[i+1];
+ strncpy(grad->ref, href+1, 62);
+ grad->ref[62] = '\0';
+ }
+ }
+ }
+
+ grad->next = p->gradients;
+ p->gradients = grad;
+}
+
+static void nsvg__parseGradientStop(NSVGparser* p, const char** attr)
+{
+ NSVGattrib* curAttr = nsvg__getAttr(p);
+ NSVGgradientData* grad;
+ NSVGgradientStop* stop;
+ int i, idx;
+
+ curAttr->stopOffset = 0;
+ curAttr->stopColor = 0;
+ curAttr->stopOpacity = 1.0f;
+
+ for (i = 0; attr[i]; i += 2) {
+ nsvg__parseAttr(p, attr[i], attr[i + 1]);
+ }
+
+ // Add stop to the last gradient.
+ grad = p->gradients;
+ if (grad == NULL) return;
+
+ grad->nstops++;
+ grad->stops = (NSVGgradientStop*)realloc(grad->stops, sizeof(NSVGgradientStop)*grad->nstops);
+ if (grad->stops == NULL) return;
+
+ // Insert
+ idx = grad->nstops-1;
+ for (i = 0; i < grad->nstops-1; i++) {
+ if (curAttr->stopOffset < grad->stops[i].offset) {
+ idx = i;
+ break;
+ }
+ }
+ if (idx != grad->nstops-1) {
+ for (i = grad->nstops-1; i > idx; i--)
+ grad->stops[i] = grad->stops[i-1];
+ }
+
+ stop = &grad->stops[idx];
+ stop->color = curAttr->stopColor;
+ stop->color |= (unsigned int)(curAttr->stopOpacity*255) << 24;
+ stop->offset = curAttr->stopOffset;
+}
+
+static void nsvg__startElement(void* ud, const char* el, const char** attr)
+{
+ NSVGparser* p = (NSVGparser*)ud;
+
+ if (p->defsFlag) {
+ // Skip everything but gradients in defs
+ if (strcmp(el, "linearGradient") == 0) {
+ nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
+ } else if (strcmp(el, "radialGradient") == 0) {
+ nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
+ } else if (strcmp(el, "stop") == 0) {
+ nsvg__parseGradientStop(p, attr);
+ }
+ return;
+ }
+
+ if (strcmp(el, "g") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parseAttribs(p, attr);
+ } else if (strcmp(el, "path") == 0) {
+ if (p->pathFlag) // Do not allow nested paths.
+ return;
+ nsvg__pushAttr(p);
+ nsvg__parsePath(p, attr);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "rect") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parseRect(p, attr);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "circle") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parseCircle(p, attr);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "ellipse") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parseEllipse(p, attr);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "line") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parseLine(p, attr);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "polyline") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parsePoly(p, attr, 0);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "polygon") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parsePoly(p, attr, 1);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "linearGradient") == 0) {
+ nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
+ } else if (strcmp(el, "radialGradient") == 0) {
+ nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
+ } else if (strcmp(el, "stop") == 0) {
+ nsvg__parseGradientStop(p, attr);
+ } else if (strcmp(el, "defs") == 0) {
+ p->defsFlag = 1;
+ } else if (strcmp(el, "svg") == 0) {
+ nsvg__parseSVG(p, attr);
+ }
+}
+
+static void nsvg__endElement(void* ud, const char* el)
+{
+ NSVGparser* p = (NSVGparser*)ud;
+
+ if (strcmp(el, "g") == 0) {
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "path") == 0) {
+ p->pathFlag = 0;
+ } else if (strcmp(el, "defs") == 0) {
+ p->defsFlag = 0;
+ }
+}
+
+static void nsvg__content(void* ud, const char* s)
+{
+ NSVG_NOTUSED(ud);
+ NSVG_NOTUSED(s);
+ // empty
+}
+
+static void nsvg__imageBounds(NSVGparser* p, float* bounds)
+{
+ NSVGshape* shape;
+ shape = p->image->shapes;
+ if (shape == NULL) {
+ bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0;
+ return;
+ }
+ bounds[0] = shape->bounds[0];
+ bounds[1] = shape->bounds[1];
+ bounds[2] = shape->bounds[2];
+ bounds[3] = shape->bounds[3];
+ for (shape = shape->next; shape != NULL; shape = shape->next) {
+ bounds[0] = nsvg__minf(bounds[0], shape->bounds[0]);
+ bounds[1] = nsvg__minf(bounds[1], shape->bounds[1]);
+ bounds[2] = nsvg__maxf(bounds[2], shape->bounds[2]);
+ bounds[3] = nsvg__maxf(bounds[3], shape->bounds[3]);
+ }
+}
+
+static float nsvg__viewAlign(float content, float container, int type)
+{
+ if (type == NSVG_ALIGN_MIN)
+ return 0;
+ else if (type == NSVG_ALIGN_MAX)
+ return container - content;
+ // mid
+ return (container - content) * 0.5f;
+}
+
+static void nsvg__scaleGradient(NSVGgradient* grad, float tx, float ty, float sx, float sy)
+{
+ float t[6];
+ nsvg__xformSetTranslation(t, tx, ty);
+ nsvg__xformMultiply (grad->xform, t);
+
+ nsvg__xformSetScale(t, sx, sy);
+ nsvg__xformMultiply (grad->xform, t);
+}
+
+static void nsvg__scaleToViewbox(NSVGparser* p, const char* units)
+{
+ NSVGshape* shape;
+ NSVGpath* path;
+ float tx, ty, sx, sy, us, bounds[4], t[6], avgs;
+ int i;
+ float* pt;
+
+ // Guess image size if not set completely.
+ nsvg__imageBounds(p, bounds);
+
+ if (p->viewWidth == 0) {
+ if (p->image->width > 0) {
+ p->viewWidth = p->image->width;
+ } else {
+ p->viewMinx = bounds[0];
+ p->viewWidth = bounds[2] - bounds[0];
+ }
+ }
+ if (p->viewHeight == 0) {
+ if (p->image->height > 0) {
+ p->viewHeight = p->image->height;
+ } else {
+ p->viewMiny = bounds[1];
+ p->viewHeight = bounds[3] - bounds[1];
+ }
+ }
+ if (p->image->width == 0)
+ p->image->width = p->viewWidth;
+ if (p->image->height == 0)
+ p->image->height = p->viewHeight;
+
+ tx = -p->viewMinx;
+ ty = -p->viewMiny;
+ sx = p->viewWidth > 0 ? p->image->width / p->viewWidth : 0;
+ sy = p->viewHeight > 0 ? p->image->height / p->viewHeight : 0;
+ // Unit scaling
+ us = 1.0f / nsvg__convertToPixels(p, nsvg__coord(1.0f, nsvg__parseUnits(units)), 0.0f, 1.0f);
+
+ // Fix aspect ratio
+ if (p->alignType == NSVG_ALIGN_MEET) {
+ // fit whole image into viewbox
+ sx = sy = nsvg__minf(sx, sy);
+ tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
+ ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
+ } else if (p->alignType == NSVG_ALIGN_SLICE) {
+ // fill whole viewbox with image
+ sx = sy = nsvg__maxf(sx, sy);
+ tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
+ ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
+ }
+
+ // Transform
+ sx *= us;
+ sy *= us;
+ avgs = (sx+sy) / 2.0f;
+ for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
+ shape->bounds[0] = (shape->bounds[0] + tx) * sx;
+ shape->bounds[1] = (shape->bounds[1] + ty) * sy;
+ shape->bounds[2] = (shape->bounds[2] + tx) * sx;
+ shape->bounds[3] = (shape->bounds[3] + ty) * sy;
+ for (path = shape->paths; path != NULL; path = path->next) {
+ path->bounds[0] = (path->bounds[0] + tx) * sx;
+ path->bounds[1] = (path->bounds[1] + ty) * sy;
+ path->bounds[2] = (path->bounds[2] + tx) * sx;
+ path->bounds[3] = (path->bounds[3] + ty) * sy;
+ for (i =0; i < path->npts; i++) {
+ pt = &path->pts[i*2];
+ pt[0] = (pt[0] + tx) * sx;
+ pt[1] = (pt[1] + ty) * sy;
+ }
+ }
+
+ if (shape->fill.type == NSVG_PAINT_LINEAR_GRADIENT || shape->fill.type == NSVG_PAINT_RADIAL_GRADIENT) {
+ nsvg__scaleGradient(shape->fill.gradient, tx,ty, sx,sy);
+ memcpy(t, shape->fill.gradient->xform, sizeof(float)*6);
+ nsvg__xformInverse(shape->fill.gradient->xform, t);
+ }
+ if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) {
+ nsvg__scaleGradient(shape->stroke.gradient, tx,ty, sx,sy);
+ memcpy(t, shape->stroke.gradient->xform, sizeof(float)*6);
+ nsvg__xformInverse(shape->stroke.gradient->xform, t);
+ }
+
+ shape->strokeWidth *= avgs;
+ shape->strokeDashOffset *= avgs;
+ for (i = 0; i < shape->strokeDashCount; i++)
+ shape->strokeDashArray[i] *= avgs;
+ }
+}
+
+static void nsvg__createGradients(NSVGparser* p)
+{
+ NSVGshape* shape;
+
+ for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
+ if (shape->fill.type == NSVG_PAINT_UNDEF) {
+ if (shape->fillGradient[0] != '\0') {
+ float inv[6], localBounds[4];
+ nsvg__xformInverse(inv, shape->xform);
+ nsvg__getLocalBounds(localBounds, shape, inv);
+ shape->fill.gradient = nsvg__createGradient(p, shape->fillGradient, localBounds, shape->xform, &shape->fill.type);
+ }
+ if (shape->fill.type == NSVG_PAINT_UNDEF) {
+ shape->fill.type = NSVG_PAINT_NONE;
+ }
+ }
+ if (shape->stroke.type == NSVG_PAINT_UNDEF) {
+ if (shape->strokeGradient[0] != '\0') {
+ float inv[6], localBounds[4];
+ nsvg__xformInverse(inv, shape->xform);
+ nsvg__getLocalBounds(localBounds, shape, inv);
+ shape->stroke.gradient = nsvg__createGradient(p, shape->strokeGradient, localBounds, shape->xform, &shape->stroke.type);
+ }
+ if (shape->stroke.type == NSVG_PAINT_UNDEF) {
+ shape->stroke.type = NSVG_PAINT_NONE;
+ }
+ }
+ }
+}
+
+NSVGimage* nsvgParse(char* input, const char* units, float dpi)
+{
+ NSVGparser* p;
+ NSVGimage* ret = 0;
+
+ p = nsvg__createParser();
+ if (p == NULL) {
+ return NULL;
+ }
+ p->dpi = dpi;
+
+ nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p);
+
+ // Create gradients after all definitions have been parsed
+ nsvg__createGradients(p);
+
+ // Scale to viewBox
+ nsvg__scaleToViewbox(p, units);
+
+ ret = p->image;
+ p->image = NULL;
+
+ nsvg__deleteParser(p);
+
+ return ret;
+}
+
+NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi)
+{
+ FILE* fp = NULL;
+ size_t size;
+ char* data = NULL;
+ NSVGimage* image = NULL;
+
+ fp = fopen(filename, "rb");
+ if (!fp) goto error;
+ fseek(fp, 0, SEEK_END);
+ size = ftell(fp);
+ fseek(fp, 0, SEEK_SET);
+ data = (char*)malloc(size+1);
+ if (data == NULL) goto error;
+ if (fread(data, 1, size, fp) != size) goto error;
+ data[size] = '\0'; // Must be null terminated.
+ fclose(fp);
+ image = nsvgParse(data, units, dpi);
+ free(data);
+
+ return image;
+
+error:
+ if (fp) fclose(fp);
+ if (data) free(data);
+ if (image) nsvgDelete(image);
+ return NULL;
+}
+
+NSVGpath* nsvgDuplicatePath(NSVGpath* p)
+{
+ NSVGpath* res = NULL;
+
+ if (p == NULL)
+ return NULL;
+
+ res = (NSVGpath*)malloc(sizeof(NSVGpath));
+ if (res == NULL) goto error;
+ memset(res, 0, sizeof(NSVGpath));
+
+ res->pts = (float*)malloc(p->npts*2*sizeof(float));
+ if (res->pts == NULL) goto error;
+ memcpy(res->pts, p->pts, p->npts * sizeof(float) * 2);
+ res->npts = p->npts;
+
+ memcpy(res->bounds, p->bounds, sizeof(p->bounds));
+
+ res->closed = p->closed;
+
+ return res;
+
+error:
+ if (res != NULL) {
+ free(res->pts);
+ free(res);
+ }
+ return NULL;
+}
+
+void nsvgDelete(NSVGimage* image)
+{
+ NSVGshape *snext, *shape;
+ if (image == NULL) return;
+ shape = image->shapes;
+ while (shape != NULL) {
+ snext = shape->next;
+ nsvg__deletePaths(shape->paths);
+ nsvg__deletePaint(&shape->fill);
+ nsvg__deletePaint(&shape->stroke);
+ free(shape);
+ shape = snext;
+ }
+ free(image);
+}
+
+#endif // NANOSVG_IMPLEMENTATION
+
+#endif // NANOSVG_H
diff --git a/svg/nanosvgrast.h b/svg/nanosvgrast.h
new file mode 100644
index 0000000..90d42e9
--- /dev/null
+++ b/svg/nanosvgrast.h
@@ -0,0 +1,1460 @@
+/*
+ * Copyright (c) 2013-14 Mikko Mononen memon@inside.org
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ * The polygon rasterization is heavily based on stb_truetype rasterizer
+ * by Sean Barrett - http://nothings.org/
+ *
+ */
+
+#ifndef NANOSVGRAST_H
+#define NANOSVGRAST_H
+
+#include "nanosvg.h"
+
+#ifndef NANOSVGRAST_CPLUSPLUS
+#ifdef __cplusplus
+extern "C" {
+#endif
+#endif
+
+typedef struct NSVGrasterizer NSVGrasterizer;
+
+/* Example Usage:
+ // Load SVG
+ NSVGimage* image;
+ image = nsvgParseFromFile("test.svg", "px", 96);
+
+ // Create rasterizer (can be used to render multiple images).
+ struct NSVGrasterizer* rast = nsvgCreateRasterizer();
+ // Allocate memory for image
+ unsigned char* img = malloc(w*h*4);
+ // Rasterize
+ nsvgRasterize(rast, image, 0,0,1, img, w, h, w*4);
+*/
+
+// Allocated rasterizer context.
+NSVGrasterizer* nsvgCreateRasterizer(void);
+
+// Rasterizes SVG image, returns RGBA image (non-premultiplied alpha)
+// r - pointer to rasterizer context
+// image - pointer to image to rasterize
+// tx,ty - image offset (applied after scaling)
+// scale - image scale
+// dst - pointer to destination image data, 4 bytes per pixel (RGBA)
+// w - width of the image to render
+// h - height of the image to render
+// stride - number of bytes per scaleline in the destination buffer
+void nsvgRasterize(NSVGrasterizer* r,
+ NSVGimage* image, float tx, float ty, float scale,
+ unsigned char* dst, int w, int h, int stride);
+
+// Deletes rasterizer context.
+void nsvgDeleteRasterizer(NSVGrasterizer*);
+
+
+#ifndef NANOSVGRAST_CPLUSPLUS
+#ifdef __cplusplus
+}
+#endif
+#endif
+
+#ifdef NANOSVGRAST_IMPLEMENTATION
+
+#include
+#include
+#include
+
+#define NSVG__SUBSAMPLES 5
+#define NSVG__FIXSHIFT 10
+#define NSVG__FIX (1 << NSVG__FIXSHIFT)
+#define NSVG__FIXMASK (NSVG__FIX-1)
+#define NSVG__MEMPAGE_SIZE 1024
+
+typedef struct NSVGedge {
+ float x0,y0, x1,y1;
+ int dir;
+ struct NSVGedge* next;
+} NSVGedge;
+
+typedef struct NSVGpoint {
+ float x, y;
+ float dx, dy;
+ float len;
+ float dmx, dmy;
+ unsigned char flags;
+} NSVGpoint;
+
+typedef struct NSVGactiveEdge {
+ int x,dx;
+ float ey;
+ int dir;
+ struct NSVGactiveEdge *next;
+} NSVGactiveEdge;
+
+typedef struct NSVGmemPage {
+ unsigned char mem[NSVG__MEMPAGE_SIZE];
+ int size;
+ struct NSVGmemPage* next;
+} NSVGmemPage;
+
+typedef struct NSVGcachedPaint {
+ signed char type;
+ char spread;
+ float xform[6];
+ unsigned int colors[256];
+} NSVGcachedPaint;
+
+struct NSVGrasterizer
+{
+ float px, py;
+
+ float tessTol;
+ float distTol;
+
+ NSVGedge* edges;
+ int nedges;
+ int cedges;
+
+ NSVGpoint* points;
+ int npoints;
+ int cpoints;
+
+ NSVGpoint* points2;
+ int npoints2;
+ int cpoints2;
+
+ NSVGactiveEdge* freelist;
+ NSVGmemPage* pages;
+ NSVGmemPage* curpage;
+
+ unsigned char* scanline;
+ int cscanline;
+
+ unsigned char* bitmap;
+ int width, height, stride;
+};
+
+NSVGrasterizer* nsvgCreateRasterizer(void)
+{
+ NSVGrasterizer* r = (NSVGrasterizer*)malloc(sizeof(NSVGrasterizer));
+ if (r == NULL) goto error;
+ memset(r, 0, sizeof(NSVGrasterizer));
+
+ r->tessTol = 0.25f;
+ r->distTol = 0.01f;
+
+ return r;
+
+error:
+ nsvgDeleteRasterizer(r);
+ return NULL;
+}
+
+void nsvgDeleteRasterizer(NSVGrasterizer* r)
+{
+ NSVGmemPage* p;
+
+ if (r == NULL) return;
+
+ p = r->pages;
+ while (p != NULL) {
+ NSVGmemPage* next = p->next;
+ free(p);
+ p = next;
+ }
+
+ if (r->edges) free(r->edges);
+ if (r->points) free(r->points);
+ if (r->points2) free(r->points2);
+ if (r->scanline) free(r->scanline);
+
+ free(r);
+}
+
+static NSVGmemPage* nsvg__nextPage(NSVGrasterizer* r, NSVGmemPage* cur)
+{
+ NSVGmemPage *newp;
+
+ // If using existing chain, return the next page in chain
+ if (cur != NULL && cur->next != NULL) {
+ return cur->next;
+ }
+
+ // Alloc new page
+ newp = (NSVGmemPage*)malloc(sizeof(NSVGmemPage));
+ if (newp == NULL) return NULL;
+ memset(newp, 0, sizeof(NSVGmemPage));
+
+ // Add to linked list
+ if (cur != NULL)
+ cur->next = newp;
+ else
+ r->pages = newp;
+
+ return newp;
+}
+
+static void nsvg__resetPool(NSVGrasterizer* r)
+{
+ NSVGmemPage* p = r->pages;
+ while (p != NULL) {
+ p->size = 0;
+ p = p->next;
+ }
+ r->curpage = r->pages;
+}
+
+static unsigned char* nsvg__alloc(NSVGrasterizer* r, int size)
+{
+ unsigned char* buf;
+ if (size > NSVG__MEMPAGE_SIZE) return NULL;
+ if (r->curpage == NULL || r->curpage->size+size > NSVG__MEMPAGE_SIZE) {
+ r->curpage = nsvg__nextPage(r, r->curpage);
+ }
+ buf = &r->curpage->mem[r->curpage->size];
+ r->curpage->size += size;
+ return buf;
+}
+
+static int nsvg__ptEquals(float x1, float y1, float x2, float y2, float tol)
+{
+ float dx = x2 - x1;
+ float dy = y2 - y1;
+ return dx*dx + dy*dy < tol*tol;
+}
+
+static void nsvg__addPathPoint(NSVGrasterizer* r, float x, float y, int flags)
+{
+ NSVGpoint* pt;
+
+ if (r->npoints > 0) {
+ pt = &r->points[r->npoints-1];
+ if (nsvg__ptEquals(pt->x,pt->y, x,y, r->distTol)) {
+ pt->flags = (unsigned char)(pt->flags | flags);
+ return;
+ }
+ }
+
+ if (r->npoints+1 > r->cpoints) {
+ r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64;
+ r->points = (NSVGpoint*)realloc(r->points, sizeof(NSVGpoint) * r->cpoints);
+ if (r->points == NULL) return;
+ }
+
+ pt = &r->points[r->npoints];
+ pt->x = x;
+ pt->y = y;
+ pt->flags = (unsigned char)flags;
+ r->npoints++;
+}
+
+static void nsvg__appendPathPoint(NSVGrasterizer* r, NSVGpoint pt)
+{
+ if (r->npoints+1 > r->cpoints) {
+ r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64;
+ r->points = (NSVGpoint*)realloc(r->points, sizeof(NSVGpoint) * r->cpoints);
+ if (r->points == NULL) return;
+ }
+ r->points[r->npoints] = pt;
+ r->npoints++;
+}
+
+static void nsvg__duplicatePoints(NSVGrasterizer* r)
+{
+ if (r->npoints > r->cpoints2) {
+ r->cpoints2 = r->npoints;
+ r->points2 = (NSVGpoint*)realloc(r->points2, sizeof(NSVGpoint) * r->cpoints2);
+ if (r->points2 == NULL) return;
+ }
+
+ memcpy(r->points2, r->points, sizeof(NSVGpoint) * r->npoints);
+ r->npoints2 = r->npoints;
+}
+
+static void nsvg__addEdge(NSVGrasterizer* r, float x0, float y0, float x1, float y1)
+{
+ NSVGedge* e;
+
+ // Skip horizontal edges
+ if (y0 == y1)
+ return;
+
+ if (r->nedges+1 > r->cedges) {
+ r->cedges = r->cedges > 0 ? r->cedges * 2 : 64;
+ r->edges = (NSVGedge*)realloc(r->edges, sizeof(NSVGedge) * r->cedges);
+ if (r->edges == NULL) return;
+ }
+
+ e = &r->edges[r->nedges];
+ r->nedges++;
+
+ if (y0 < y1) {
+ e->x0 = x0;
+ e->y0 = y0;
+ e->x1 = x1;
+ e->y1 = y1;
+ e->dir = 1;
+ } else {
+ e->x0 = x1;
+ e->y0 = y1;
+ e->x1 = x0;
+ e->y1 = y0;
+ e->dir = -1;
+ }
+}
+
+static float nsvg__normalize(float *x, float* y)
+{
+ float d = sqrtf((*x)*(*x) + (*y)*(*y));
+ if (d > 1e-6f) {
+ float id = 1.0f / d;
+ *x *= id;
+ *y *= id;
+ }
+ return d;
+}
+
+static float nsvg__absf(float x) { return x < 0 ? -x : x; }
+static float nsvg__roundf(float x) { return (x >= 0) ? floorf(x + 0.5) : ceilf(x - 0.5); }
+
+static void nsvg__flattenCubicBez(NSVGrasterizer* r,
+ float x1, float y1, float x2, float y2,
+ float x3, float y3, float x4, float y4,
+ int level, int type)
+{
+ float x12,y12,x23,y23,x34,y34,x123,y123,x234,y234,x1234,y1234;
+ float dx,dy,d2,d3;
+
+ if (level > 10) return;
+
+ x12 = (x1+x2)*0.5f;
+ y12 = (y1+y2)*0.5f;
+ x23 = (x2+x3)*0.5f;
+ y23 = (y2+y3)*0.5f;
+ x34 = (x3+x4)*0.5f;
+ y34 = (y3+y4)*0.5f;
+ x123 = (x12+x23)*0.5f;
+ y123 = (y12+y23)*0.5f;
+
+ dx = x4 - x1;
+ dy = y4 - y1;
+ d2 = nsvg__absf((x2 - x4) * dy - (y2 - y4) * dx);
+ d3 = nsvg__absf((x3 - x4) * dy - (y3 - y4) * dx);
+
+ if ((d2 + d3)*(d2 + d3) < r->tessTol * (dx*dx + dy*dy)) {
+ nsvg__addPathPoint(r, x4, y4, type);
+ return;
+ }
+
+ x234 = (x23+x34)*0.5f;
+ y234 = (y23+y34)*0.5f;
+ x1234 = (x123+x234)*0.5f;
+ y1234 = (y123+y234)*0.5f;
+
+ nsvg__flattenCubicBez(r, x1,y1, x12,y12, x123,y123, x1234,y1234, level+1, 0);
+ nsvg__flattenCubicBez(r, x1234,y1234, x234,y234, x34,y34, x4,y4, level+1, type);
+}
+
+static void nsvg__flattenShape(NSVGrasterizer* r, NSVGshape* shape, float scale)
+{
+ int i, j;
+ NSVGpath* path;
+
+ for (path = shape->paths; path != NULL; path = path->next) {
+ r->npoints = 0;
+ // Flatten path
+ nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, 0);
+ for (i = 0; i < path->npts-1; i += 3) {
+ float* p = &path->pts[i*2];
+ nsvg__flattenCubicBez(r, p[0]*scale,p[1]*scale, p[2]*scale,p[3]*scale, p[4]*scale,p[5]*scale, p[6]*scale,p[7]*scale, 0, 0);
+ }
+ // Close path
+ nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, 0);
+ // Build edges
+ for (i = 0, j = r->npoints-1; i < r->npoints; j = i++)
+ nsvg__addEdge(r, r->points[j].x, r->points[j].y, r->points[i].x, r->points[i].y);
+ }
+}
+
+enum NSVGpointFlags
+{
+ NSVG_PT_CORNER = 0x01,
+ NSVG_PT_BEVEL = 0x02,
+ NSVG_PT_LEFT = 0x04
+};
+
+static void nsvg__initClosed(NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
+{
+ float w = lineWidth * 0.5f;
+ float dx = p1->x - p0->x;
+ float dy = p1->y - p0->y;
+ float len = nsvg__normalize(&dx, &dy);
+ float px = p0->x + dx*len*0.5f, py = p0->y + dy*len*0.5f;
+ float dlx = dy, dly = -dx;
+ float lx = px - dlx*w, ly = py - dly*w;
+ float rx = px + dlx*w, ry = py + dly*w;
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+static void nsvg__buttCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int connect)
+{
+ float w = lineWidth * 0.5f;
+ float px = p->x, py = p->y;
+ float dlx = dy, dly = -dx;
+ float lx = px - dlx*w, ly = py - dly*w;
+ float rx = px + dlx*w, ry = py + dly*w;
+
+ nsvg__addEdge(r, lx, ly, rx, ry);
+
+ if (connect) {
+ nsvg__addEdge(r, left->x, left->y, lx, ly);
+ nsvg__addEdge(r, rx, ry, right->x, right->y);
+ }
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+static void nsvg__squareCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int connect)
+{
+ float w = lineWidth * 0.5f;
+ float px = p->x - dx*w, py = p->y - dy*w;
+ float dlx = dy, dly = -dx;
+ float lx = px - dlx*w, ly = py - dly*w;
+ float rx = px + dlx*w, ry = py + dly*w;
+
+ nsvg__addEdge(r, lx, ly, rx, ry);
+
+ if (connect) {
+ nsvg__addEdge(r, left->x, left->y, lx, ly);
+ nsvg__addEdge(r, rx, ry, right->x, right->y);
+ }
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+#ifndef NSVG_PI
+#define NSVG_PI (3.14159265358979323846264338327f)
+#endif
+
+static void nsvg__roundCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int ncap, int connect)
+{
+ int i;
+ float w = lineWidth * 0.5f;
+ float px = p->x, py = p->y;
+ float dlx = dy, dly = -dx;
+ float lx = 0, ly = 0, rx = 0, ry = 0, prevx = 0, prevy = 0;
+
+ for (i = 0; i < ncap; i++) {
+ float a = (float)i/(float)(ncap-1)*NSVG_PI;
+ float ax = cosf(a) * w, ay = sinf(a) * w;
+ float x = px - dlx*ax - dx*ay;
+ float y = py - dly*ax - dy*ay;
+
+ if (i > 0)
+ nsvg__addEdge(r, prevx, prevy, x, y);
+
+ prevx = x;
+ prevy = y;
+
+ if (i == 0) {
+ lx = x; ly = y;
+ } else if (i == ncap-1) {
+ rx = x; ry = y;
+ }
+ }
+
+ if (connect) {
+ nsvg__addEdge(r, left->x, left->y, lx, ly);
+ nsvg__addEdge(r, rx, ry, right->x, right->y);
+ }
+
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+static void nsvg__bevelJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
+{
+ float w = lineWidth * 0.5f;
+ float dlx0 = p0->dy, dly0 = -p0->dx;
+ float dlx1 = p1->dy, dly1 = -p1->dx;
+ float lx0 = p1->x - (dlx0 * w), ly0 = p1->y - (dly0 * w);
+ float rx0 = p1->x + (dlx0 * w), ry0 = p1->y + (dly0 * w);
+ float lx1 = p1->x - (dlx1 * w), ly1 = p1->y - (dly1 * w);
+ float rx1 = p1->x + (dlx1 * w), ry1 = p1->y + (dly1 * w);
+
+ nsvg__addEdge(r, lx0, ly0, left->x, left->y);
+ nsvg__addEdge(r, lx1, ly1, lx0, ly0);
+
+ nsvg__addEdge(r, right->x, right->y, rx0, ry0);
+ nsvg__addEdge(r, rx0, ry0, rx1, ry1);
+
+ left->x = lx1; left->y = ly1;
+ right->x = rx1; right->y = ry1;
+}
+
+static void nsvg__miterJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
+{
+ float w = lineWidth * 0.5f;
+ float dlx0 = p0->dy, dly0 = -p0->dx;
+ float dlx1 = p1->dy, dly1 = -p1->dx;
+ float lx0, rx0, lx1, rx1;
+ float ly0, ry0, ly1, ry1;
+
+ if (p1->flags & NSVG_PT_LEFT) {
+ lx0 = lx1 = p1->x - p1->dmx * w;
+ ly0 = ly1 = p1->y - p1->dmy * w;
+ nsvg__addEdge(r, lx1, ly1, left->x, left->y);
+
+ rx0 = p1->x + (dlx0 * w);
+ ry0 = p1->y + (dly0 * w);
+ rx1 = p1->x + (dlx1 * w);
+ ry1 = p1->y + (dly1 * w);
+ nsvg__addEdge(r, right->x, right->y, rx0, ry0);
+ nsvg__addEdge(r, rx0, ry0, rx1, ry1);
+ } else {
+ lx0 = p1->x - (dlx0 * w);
+ ly0 = p1->y - (dly0 * w);
+ lx1 = p1->x - (dlx1 * w);
+ ly1 = p1->y - (dly1 * w);
+ nsvg__addEdge(r, lx0, ly0, left->x, left->y);
+ nsvg__addEdge(r, lx1, ly1, lx0, ly0);
+
+ rx0 = rx1 = p1->x + p1->dmx * w;
+ ry0 = ry1 = p1->y + p1->dmy * w;
+ nsvg__addEdge(r, right->x, right->y, rx1, ry1);
+ }
+
+ left->x = lx1; left->y = ly1;
+ right->x = rx1; right->y = ry1;
+}
+
+static void nsvg__roundJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth, int ncap)
+{
+ int i, n;
+ float w = lineWidth * 0.5f;
+ float dlx0 = p0->dy, dly0 = -p0->dx;
+ float dlx1 = p1->dy, dly1 = -p1->dx;
+ float a0 = atan2f(dly0, dlx0);
+ float a1 = atan2f(dly1, dlx1);
+ float da = a1 - a0;
+ float lx, ly, rx, ry;
+
+ if (da < NSVG_PI) da += NSVG_PI*2;
+ if (da > NSVG_PI) da -= NSVG_PI*2;
+
+ n = (int)ceilf((nsvg__absf(da) / NSVG_PI) * (float)ncap);
+ if (n < 2) n = 2;
+ if (n > ncap) n = ncap;
+
+ lx = left->x;
+ ly = left->y;
+ rx = right->x;
+ ry = right->y;
+
+ for (i = 0; i < n; i++) {
+ float u = (float)i/(float)(n-1);
+ float a = a0 + u*da;
+ float ax = cosf(a) * w, ay = sinf(a) * w;
+ float lx1 = p1->x - ax, ly1 = p1->y - ay;
+ float rx1 = p1->x + ax, ry1 = p1->y + ay;
+
+ nsvg__addEdge(r, lx1, ly1, lx, ly);
+ nsvg__addEdge(r, rx, ry, rx1, ry1);
+
+ lx = lx1; ly = ly1;
+ rx = rx1; ry = ry1;
+ }
+
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+static void nsvg__straightJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p1, float lineWidth)
+{
+ float w = lineWidth * 0.5f;
+ float lx = p1->x - (p1->dmx * w), ly = p1->y - (p1->dmy * w);
+ float rx = p1->x + (p1->dmx * w), ry = p1->y + (p1->dmy * w);
+
+ nsvg__addEdge(r, lx, ly, left->x, left->y);
+ nsvg__addEdge(r, right->x, right->y, rx, ry);
+
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+static int nsvg__curveDivs(float r, float arc, float tol)
+{
+ float da = acosf(r / (r + tol)) * 2.0f;
+ int divs = (int)ceilf(arc / da);
+ if (divs < 2) divs = 2;
+ return divs;
+}
+
+static void nsvg__expandStroke(NSVGrasterizer* r, NSVGpoint* points, int npoints, int closed, int lineJoin, int lineCap, float lineWidth)
+{
+ int ncap = nsvg__curveDivs(lineWidth*0.5f, NSVG_PI, r->tessTol); // Calculate divisions per half circle.
+ NSVGpoint left = {0,0,0,0,0,0,0,0}, right = {0,0,0,0,0,0,0,0}, firstLeft = {0,0,0,0,0,0,0,0}, firstRight = {0,0,0,0,0,0,0,0};
+ NSVGpoint* p0, *p1;
+ int j, s, e;
+
+ // Build stroke edges
+ if (closed) {
+ // Looping
+ p0 = &points[npoints-1];
+ p1 = &points[0];
+ s = 0;
+ e = npoints;
+ } else {
+ // Add cap
+ p0 = &points[0];
+ p1 = &points[1];
+ s = 1;
+ e = npoints-1;
+ }
+
+ if (closed) {
+ nsvg__initClosed(&left, &right, p0, p1, lineWidth);
+ firstLeft = left;
+ firstRight = right;
+ } else {
+ // Add cap
+ float dx = p1->x - p0->x;
+ float dy = p1->y - p0->y;
+ nsvg__normalize(&dx, &dy);
+ if (lineCap == NSVG_CAP_BUTT)
+ nsvg__buttCap(r, &left, &right, p0, dx, dy, lineWidth, 0);
+ else if (lineCap == NSVG_CAP_SQUARE)
+ nsvg__squareCap(r, &left, &right, p0, dx, dy, lineWidth, 0);
+ else if (lineCap == NSVG_CAP_ROUND)
+ nsvg__roundCap(r, &left, &right, p0, dx, dy, lineWidth, ncap, 0);
+ }
+
+ for (j = s; j < e; ++j) {
+ if (p1->flags & NSVG_PT_CORNER) {
+ if (lineJoin == NSVG_JOIN_ROUND)
+ nsvg__roundJoin(r, &left, &right, p0, p1, lineWidth, ncap);
+ else if (lineJoin == NSVG_JOIN_BEVEL || (p1->flags & NSVG_PT_BEVEL))
+ nsvg__bevelJoin(r, &left, &right, p0, p1, lineWidth);
+ else
+ nsvg__miterJoin(r, &left, &right, p0, p1, lineWidth);
+ } else {
+ nsvg__straightJoin(r, &left, &right, p1, lineWidth);
+ }
+ p0 = p1++;
+ }
+
+ if (closed) {
+ // Loop it
+ nsvg__addEdge(r, firstLeft.x, firstLeft.y, left.x, left.y);
+ nsvg__addEdge(r, right.x, right.y, firstRight.x, firstRight.y);
+ } else {
+ // Add cap
+ float dx = p1->x - p0->x;
+ float dy = p1->y - p0->y;
+ nsvg__normalize(&dx, &dy);
+ if (lineCap == NSVG_CAP_BUTT)
+ nsvg__buttCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1);
+ else if (lineCap == NSVG_CAP_SQUARE)
+ nsvg__squareCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1);
+ else if (lineCap == NSVG_CAP_ROUND)
+ nsvg__roundCap(r, &right, &left, p1, -dx, -dy, lineWidth, ncap, 1);
+ }
+}
+
+static void nsvg__prepareStroke(NSVGrasterizer* r, float miterLimit, int lineJoin)
+{
+ int i, j;
+ NSVGpoint* p0, *p1;
+
+ p0 = &r->points[r->npoints-1];
+ p1 = &r->points[0];
+ for (i = 0; i < r->npoints; i++) {
+ // Calculate segment direction and length
+ p0->dx = p1->x - p0->x;
+ p0->dy = p1->y - p0->y;
+ p0->len = nsvg__normalize(&p0->dx, &p0->dy);
+ // Advance
+ p0 = p1++;
+ }
+
+ // calculate joins
+ p0 = &r->points[r->npoints-1];
+ p1 = &r->points[0];
+ for (j = 0; j < r->npoints; j++) {
+ float dlx0, dly0, dlx1, dly1, dmr2, cross;
+ dlx0 = p0->dy;
+ dly0 = -p0->dx;
+ dlx1 = p1->dy;
+ dly1 = -p1->dx;
+ // Calculate extrusions
+ p1->dmx = (dlx0 + dlx1) * 0.5f;
+ p1->dmy = (dly0 + dly1) * 0.5f;
+ dmr2 = p1->dmx*p1->dmx + p1->dmy*p1->dmy;
+ if (dmr2 > 0.000001f) {
+ float s2 = 1.0f / dmr2;
+ if (s2 > 600.0f) {
+ s2 = 600.0f;
+ }
+ p1->dmx *= s2;
+ p1->dmy *= s2;
+ }
+
+ // Clear flags, but keep the corner.
+ p1->flags = (p1->flags & NSVG_PT_CORNER) ? NSVG_PT_CORNER : 0;
+
+ // Keep track of left turns.
+ cross = p1->dx * p0->dy - p0->dx * p1->dy;
+ if (cross > 0.0f)
+ p1->flags |= NSVG_PT_LEFT;
+
+ // Check to see if the corner needs to be beveled.
+ if (p1->flags & NSVG_PT_CORNER) {
+ if ((dmr2 * miterLimit*miterLimit) < 1.0f || lineJoin == NSVG_JOIN_BEVEL || lineJoin == NSVG_JOIN_ROUND) {
+ p1->flags |= NSVG_PT_BEVEL;
+ }
+ }
+
+ p0 = p1++;
+ }
+}
+
+static void nsvg__flattenShapeStroke(NSVGrasterizer* r, NSVGshape* shape, float scale)
+{
+ int i, j, closed;
+ NSVGpath* path;
+ NSVGpoint* p0, *p1;
+ float miterLimit = shape->miterLimit;
+ int lineJoin = shape->strokeLineJoin;
+ int lineCap = shape->strokeLineCap;
+ float lineWidth = shape->strokeWidth * scale;
+
+ for (path = shape->paths; path != NULL; path = path->next) {
+ // Flatten path
+ r->npoints = 0;
+ nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, NSVG_PT_CORNER);
+ for (i = 0; i < path->npts-1; i += 3) {
+ float* p = &path->pts[i*2];
+ nsvg__flattenCubicBez(r, p[0]*scale,p[1]*scale, p[2]*scale,p[3]*scale, p[4]*scale,p[5]*scale, p[6]*scale,p[7]*scale, 0, NSVG_PT_CORNER);
+ }
+ if (r->npoints < 2)
+ continue;
+
+ closed = path->closed;
+
+ // If the first and last points are the same, remove the last, mark as closed path.
+ p0 = &r->points[r->npoints-1];
+ p1 = &r->points[0];
+ if (nsvg__ptEquals(p0->x,p0->y, p1->x,p1->y, r->distTol)) {
+ r->npoints--;
+ p0 = &r->points[r->npoints-1];
+ closed = 1;
+ }
+
+ if (shape->strokeDashCount > 0) {
+ int idash = 0, dashState = 1;
+ float totalDist = 0, dashLen, allDashLen, dashOffset;
+ NSVGpoint cur;
+
+ if (closed)
+ nsvg__appendPathPoint(r, r->points[0]);
+
+ // Duplicate points -> points2.
+ nsvg__duplicatePoints(r);
+
+ r->npoints = 0;
+ cur = r->points2[0];
+ nsvg__appendPathPoint(r, cur);
+
+ // Figure out dash offset.
+ allDashLen = 0;
+ for (j = 0; j < shape->strokeDashCount; j++)
+ allDashLen += shape->strokeDashArray[j];
+ if (shape->strokeDashCount & 1)
+ allDashLen *= 2.0f;
+ // Find location inside pattern
+ dashOffset = fmodf(shape->strokeDashOffset, allDashLen);
+ if (dashOffset < 0.0f)
+ dashOffset += allDashLen;
+
+ while (dashOffset > shape->strokeDashArray[idash]) {
+ dashOffset -= shape->strokeDashArray[idash];
+ idash = (idash + 1) % shape->strokeDashCount;
+ }
+ dashLen = (shape->strokeDashArray[idash] - dashOffset) * scale;
+
+ for (j = 1; j < r->npoints2; ) {
+ float dx = r->points2[j].x - cur.x;
+ float dy = r->points2[j].y - cur.y;
+ float dist = sqrtf(dx*dx + dy*dy);
+
+ if ((totalDist + dist) > dashLen) {
+ // Calculate intermediate point
+ float d = (dashLen - totalDist) / dist;
+ float x = cur.x + dx * d;
+ float y = cur.y + dy * d;
+ nsvg__addPathPoint(r, x, y, NSVG_PT_CORNER);
+
+ // Stroke
+ if (r->npoints > 1 && dashState) {
+ nsvg__prepareStroke(r, miterLimit, lineJoin);
+ nsvg__expandStroke(r, r->points, r->npoints, 0, lineJoin, lineCap, lineWidth);
+ }
+ // Advance dash pattern
+ dashState = !dashState;
+ idash = (idash+1) % shape->strokeDashCount;
+ dashLen = shape->strokeDashArray[idash] * scale;
+ // Restart
+ cur.x = x;
+ cur.y = y;
+ cur.flags = NSVG_PT_CORNER;
+ totalDist = 0.0f;
+ r->npoints = 0;
+ nsvg__appendPathPoint(r, cur);
+ } else {
+ totalDist += dist;
+ cur = r->points2[j];
+ nsvg__appendPathPoint(r, cur);
+ j++;
+ }
+ }
+ // Stroke any leftover path
+ if (r->npoints > 1 && dashState)
+ nsvg__expandStroke(r, r->points, r->npoints, 0, lineJoin, lineCap, lineWidth);
+ } else {
+ nsvg__prepareStroke(r, miterLimit, lineJoin);
+ nsvg__expandStroke(r, r->points, r->npoints, closed, lineJoin, lineCap, lineWidth);
+ }
+ }
+}
+
+static int nsvg__cmpEdge(const void *p, const void *q)
+{
+ const NSVGedge* a = (const NSVGedge*)p;
+ const NSVGedge* b = (const NSVGedge*)q;
+
+ if (a->y0 < b->y0) return -1;
+ if (a->y0 > b->y0) return 1;
+ return 0;
+}
+
+
+static NSVGactiveEdge* nsvg__addActive(NSVGrasterizer* r, NSVGedge* e, float startPoint)
+{
+ NSVGactiveEdge* z;
+
+ if (r->freelist != NULL) {
+ // Restore from freelist.
+ z = r->freelist;
+ r->freelist = z->next;
+ } else {
+ // Alloc new edge.
+ z = (NSVGactiveEdge*)nsvg__alloc(r, sizeof(NSVGactiveEdge));
+ if (z == NULL) return NULL;
+ }
+
+ float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
+// STBTT_assert(e->y0 <= start_point);
+ // round dx down to avoid going too far
+ if (dxdy < 0)
+ z->dx = (int)(-nsvg__roundf(NSVG__FIX * -dxdy));
+ else
+ z->dx = (int)nsvg__roundf(NSVG__FIX * dxdy);
+ z->x = (int)nsvg__roundf(NSVG__FIX * (e->x0 + dxdy * (startPoint - e->y0)));
+// z->x -= off_x * FIX;
+ z->ey = e->y1;
+ z->next = 0;
+ z->dir = e->dir;
+
+ return z;
+}
+
+static void nsvg__freeActive(NSVGrasterizer* r, NSVGactiveEdge* z)
+{
+ z->next = r->freelist;
+ r->freelist = z;
+}
+
+static void nsvg__fillScanline(unsigned char* scanline, int len, int x0, int x1, int maxWeight, int* xmin, int* xmax)
+{
+ int i = x0 >> NSVG__FIXSHIFT;
+ int j = x1 >> NSVG__FIXSHIFT;
+ if (i < *xmin) *xmin = i;
+ if (j > *xmax) *xmax = j;
+ if (i < len && j >= 0) {
+ if (i == j) {
+ // x0,x1 are the same pixel, so compute combined coverage
+ scanline[i] = (unsigned char)(scanline[i] + ((x1 - x0) * maxWeight >> NSVG__FIXSHIFT));
+ } else {
+ if (i >= 0) // add antialiasing for x0
+ scanline[i] = (unsigned char)(scanline[i] + (((NSVG__FIX - (x0 & NSVG__FIXMASK)) * maxWeight) >> NSVG__FIXSHIFT));
+ else
+ i = -1; // clip
+
+ if (j < len) // add antialiasing for x1
+ scanline[j] = (unsigned char)(scanline[j] + (((x1 & NSVG__FIXMASK) * maxWeight) >> NSVG__FIXSHIFT));
+ else
+ j = len; // clip
+
+ for (++i; i < j; ++i) // fill pixels between x0 and x1
+ scanline[i] = (unsigned char)(scanline[i] + maxWeight);
+ }
+ }
+}
+
+// note: this routine clips fills that extend off the edges... ideally this
+// wouldn't happen, but it could happen if the truetype glyph bounding boxes
+// are wrong, or if the user supplies a too-small bitmap
+static void nsvg__fillActiveEdges(unsigned char* scanline, int len, NSVGactiveEdge* e, int maxWeight, int* xmin, int* xmax, char fillRule)
+{
+ // non-zero winding fill
+ int x0 = 0, w = 0;
+
+ if (fillRule == NSVG_FILLRULE_NONZERO) {
+ // Non-zero
+ while (e != NULL) {
+ if (w == 0) {
+ // if we're currently at zero, we need to record the edge start point
+ x0 = e->x; w += e->dir;
+ } else {
+ int x1 = e->x; w += e->dir;
+ // if we went to zero, we need to draw
+ if (w == 0)
+ nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, xmax);
+ }
+ e = e->next;
+ }
+ } else if (fillRule == NSVG_FILLRULE_EVENODD) {
+ // Even-odd
+ while (e != NULL) {
+ if (w == 0) {
+ // if we're currently at zero, we need to record the edge start point
+ x0 = e->x; w = 1;
+ } else {
+ int x1 = e->x; w = 0;
+ nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, xmax);
+ }
+ e = e->next;
+ }
+ }
+}
+
+static float nsvg__clampf(float a, float mn, float mx) { return a < mn ? mn : (a > mx ? mx : a); }
+
+static unsigned int nsvg__RGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
+{
+ return ((unsigned int)r) | ((unsigned int)g << 8) | ((unsigned int)b << 16) | ((unsigned int)a << 24);
+}
+
+static unsigned int nsvg__lerpRGBA(unsigned int c0, unsigned int c1, float u)
+{
+ int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f);
+ int r = (((c0) & 0xff)*(256-iu) + (((c1) & 0xff)*iu)) >> 8;
+ int g = (((c0>>8) & 0xff)*(256-iu) + (((c1>>8) & 0xff)*iu)) >> 8;
+ int b = (((c0>>16) & 0xff)*(256-iu) + (((c1>>16) & 0xff)*iu)) >> 8;
+ int a = (((c0>>24) & 0xff)*(256-iu) + (((c1>>24) & 0xff)*iu)) >> 8;
+ return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a);
+}
+
+static unsigned int nsvg__applyOpacity(unsigned int c, float u)
+{
+ int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f);
+ int r = (c) & 0xff;
+ int g = (c>>8) & 0xff;
+ int b = (c>>16) & 0xff;
+ int a = (((c>>24) & 0xff)*iu) >> 8;
+ return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a);
+}
+
+static inline int nsvg__div255(int x)
+{
+ return ((x+1) * 257) >> 16;
+}
+
+static void nsvg__scanlineSolid(unsigned char* dst, int count, unsigned char* cover, int x, int y,
+ float tx, float ty, float scale, NSVGcachedPaint* cache)
+{
+
+ if (cache->type == NSVG_PAINT_COLOR) {
+ int i, cr, cg, cb, ca;
+ cr = cache->colors[0] & 0xff;
+ cg = (cache->colors[0] >> 8) & 0xff;
+ cb = (cache->colors[0] >> 16) & 0xff;
+ ca = (cache->colors[0] >> 24) & 0xff;
+
+ for (i = 0; i < count; i++) {
+ int r,g,b;
+ int a = nsvg__div255((int)cover[0] * ca);
+ int ia = 255 - a;
+ // Premultiply
+ r = nsvg__div255(cr * a);
+ g = nsvg__div255(cg * a);
+ b = nsvg__div255(cb * a);
+
+ // Blend over
+ r += nsvg__div255(ia * (int)dst[0]);
+ g += nsvg__div255(ia * (int)dst[1]);
+ b += nsvg__div255(ia * (int)dst[2]);
+ a += nsvg__div255(ia * (int)dst[3]);
+
+ dst[0] = (unsigned char)r;
+ dst[1] = (unsigned char)g;
+ dst[2] = (unsigned char)b;
+ dst[3] = (unsigned char)a;
+
+ cover++;
+ dst += 4;
+ }
+ } else if (cache->type == NSVG_PAINT_LINEAR_GRADIENT) {
+ // TODO: spread modes.
+ // TODO: plenty of opportunities to optimize.
+ float fx, fy, dx, gy;
+ float* t = cache->xform;
+ int i, cr, cg, cb, ca;
+ unsigned int c;
+
+ fx = ((float)x - tx) / scale;
+ fy = ((float)y - ty) / scale;
+ dx = 1.0f / scale;
+
+ for (i = 0; i < count; i++) {
+ int r,g,b,a,ia;
+ gy = fx*t[1] + fy*t[3] + t[5];
+ c = cache->colors[(int)nsvg__clampf(gy*255.0f, 0, 255.0f)];
+ cr = (c) & 0xff;
+ cg = (c >> 8) & 0xff;
+ cb = (c >> 16) & 0xff;
+ ca = (c >> 24) & 0xff;
+
+ a = nsvg__div255((int)cover[0] * ca);
+ ia = 255 - a;
+
+ // Premultiply
+ r = nsvg__div255(cr * a);
+ g = nsvg__div255(cg * a);
+ b = nsvg__div255(cb * a);
+
+ // Blend over
+ r += nsvg__div255(ia * (int)dst[0]);
+ g += nsvg__div255(ia * (int)dst[1]);
+ b += nsvg__div255(ia * (int)dst[2]);
+ a += nsvg__div255(ia * (int)dst[3]);
+
+ dst[0] = (unsigned char)r;
+ dst[1] = (unsigned char)g;
+ dst[2] = (unsigned char)b;
+ dst[3] = (unsigned char)a;
+
+ cover++;
+ dst += 4;
+ fx += dx;
+ }
+ } else if (cache->type == NSVG_PAINT_RADIAL_GRADIENT) {
+ // TODO: spread modes.
+ // TODO: plenty of opportunities to optimize.
+ // TODO: focus (fx,fy)
+ float fx, fy, dx, gx, gy, gd;
+ float* t = cache->xform;
+ int i, cr, cg, cb, ca;
+ unsigned int c;
+
+ fx = ((float)x - tx) / scale;
+ fy = ((float)y - ty) / scale;
+ dx = 1.0f / scale;
+
+ for (i = 0; i < count; i++) {
+ int r,g,b,a,ia;
+ gx = fx*t[0] + fy*t[2] + t[4];
+ gy = fx*t[1] + fy*t[3] + t[5];
+ gd = sqrtf(gx*gx + gy*gy);
+ c = cache->colors[(int)nsvg__clampf(gd*255.0f, 0, 255.0f)];
+ cr = (c) & 0xff;
+ cg = (c >> 8) & 0xff;
+ cb = (c >> 16) & 0xff;
+ ca = (c >> 24) & 0xff;
+
+ a = nsvg__div255((int)cover[0] * ca);
+ ia = 255 - a;
+
+ // Premultiply
+ r = nsvg__div255(cr * a);
+ g = nsvg__div255(cg * a);
+ b = nsvg__div255(cb * a);
+
+ // Blend over
+ r += nsvg__div255(ia * (int)dst[0]);
+ g += nsvg__div255(ia * (int)dst[1]);
+ b += nsvg__div255(ia * (int)dst[2]);
+ a += nsvg__div255(ia * (int)dst[3]);
+
+ dst[0] = (unsigned char)r;
+ dst[1] = (unsigned char)g;
+ dst[2] = (unsigned char)b;
+ dst[3] = (unsigned char)a;
+
+ cover++;
+ dst += 4;
+ fx += dx;
+ }
+ }
+}
+
+static void nsvg__rasterizeSortedEdges(NSVGrasterizer *r, float tx, float ty, float scale, NSVGcachedPaint* cache, char fillRule)
+{
+ NSVGactiveEdge *active = NULL;
+ int y, s;
+ int e = 0;
+ int maxWeight = (255 / NSVG__SUBSAMPLES); // weight per vertical scanline
+ int xmin, xmax;
+
+ for (y = 0; y < r->height; y++) {
+ memset(r->scanline, 0, r->width);
+ xmin = r->width;
+ xmax = 0;
+ for (s = 0; s < NSVG__SUBSAMPLES; ++s) {
+ // find center of pixel for this scanline
+ float scany = (float)(y*NSVG__SUBSAMPLES + s) + 0.5f;
+ NSVGactiveEdge **step = &active;
+
+ // update all active edges;
+ // remove all active edges that terminate before the center of this scanline
+ while (*step) {
+ NSVGactiveEdge *z = *step;
+ if (z->ey <= scany) {
+ *step = z->next; // delete from list
+// NSVG__assert(z->valid);
+ nsvg__freeActive(r, z);
+ } else {
+ z->x += z->dx; // advance to position for current scanline
+ step = &((*step)->next); // advance through list
+ }
+ }
+
+ // resort the list if needed
+ for (;;) {
+ int changed = 0;
+ step = &active;
+ while (*step && (*step)->next) {
+ if ((*step)->x > (*step)->next->x) {
+ NSVGactiveEdge* t = *step;
+ NSVGactiveEdge* q = t->next;
+ t->next = q->next;
+ q->next = t;
+ *step = q;
+ changed = 1;
+ }
+ step = &(*step)->next;
+ }
+ if (!changed) break;
+ }
+
+ // insert all edges that start before the center of this scanline -- omit ones that also end on this scanline
+ while (e < r->nedges && r->edges[e].y0 <= scany) {
+ if (r->edges[e].y1 > scany) {
+ NSVGactiveEdge* z = nsvg__addActive(r, &r->edges[e], scany);
+ if (z == NULL) break;
+ // find insertion point
+ if (active == NULL) {
+ active = z;
+ } else if (z->x < active->x) {
+ // insert at front
+ z->next = active;
+ active = z;
+ } else {
+ // find thing to insert AFTER
+ NSVGactiveEdge* p = active;
+ while (p->next && p->next->x < z->x)
+ p = p->next;
+ // at this point, p->next->x is NOT < z->x
+ z->next = p->next;
+ p->next = z;
+ }
+ }
+ e++;
+ }
+
+ // now process all active edges in non-zero fashion
+ if (active != NULL)
+ nsvg__fillActiveEdges(r->scanline, r->width, active, maxWeight, &xmin, &xmax, fillRule);
+ }
+ // Blit
+ if (xmin < 0) xmin = 0;
+ if (xmax > r->width-1) xmax = r->width-1;
+ if (xmin <= xmax) {
+ nsvg__scanlineSolid(&r->bitmap[y * r->stride] + xmin*4, xmax-xmin+1, &r->scanline[xmin], xmin, y, tx,ty, scale, cache);
+ }
+ }
+
+}
+
+static void nsvg__unpremultiplyAlpha(unsigned char* image, int w, int h, int stride)
+{
+ int x,y;
+
+ // Unpremultiply
+ for (y = 0; y < h; y++) {
+ unsigned char *row = &image[y*stride];
+ for (x = 0; x < w; x++) {
+ int r = row[0], g = row[1], b = row[2], a = row[3];
+ if (a != 0) {
+ row[0] = (unsigned char)(r*255/a);
+ row[1] = (unsigned char)(g*255/a);
+ row[2] = (unsigned char)(b*255/a);
+ }
+ row += 4;
+ }
+ }
+
+ // Defringe
+ for (y = 0; y < h; y++) {
+ unsigned char *row = &image[y*stride];
+ for (x = 0; x < w; x++) {
+ int r = 0, g = 0, b = 0, a = row[3], n = 0;
+ if (a == 0) {
+ if (x-1 > 0 && row[-1] != 0) {
+ r += row[-4];
+ g += row[-3];
+ b += row[-2];
+ n++;
+ }
+ if (x+1 < w && row[7] != 0) {
+ r += row[4];
+ g += row[5];
+ b += row[6];
+ n++;
+ }
+ if (y-1 > 0 && row[-stride+3] != 0) {
+ r += row[-stride];
+ g += row[-stride+1];
+ b += row[-stride+2];
+ n++;
+ }
+ if (y+1 < h && row[stride+3] != 0) {
+ r += row[stride];
+ g += row[stride+1];
+ b += row[stride+2];
+ n++;
+ }
+ if (n > 0) {
+ row[0] = (unsigned char)(r/n);
+ row[1] = (unsigned char)(g/n);
+ row[2] = (unsigned char)(b/n);
+ }
+ }
+ row += 4;
+ }
+ }
+}
+
+
+static void nsvg__initPaint(NSVGcachedPaint* cache, NSVGpaint* paint, float opacity)
+{
+ int i, j;
+ NSVGgradient* grad;
+
+ cache->type = paint->type;
+
+ if (paint->type == NSVG_PAINT_COLOR) {
+ cache->colors[0] = nsvg__applyOpacity(paint->color, opacity);
+ return;
+ }
+
+ grad = paint->gradient;
+
+ cache->spread = grad->spread;
+ memcpy(cache->xform, grad->xform, sizeof(float)*6);
+
+ if (grad->nstops == 0) {
+ for (i = 0; i < 256; i++)
+ cache->colors[i] = 0;
+ } else if (grad->nstops == 1) {
+ unsigned int color = nsvg__applyOpacity(grad->stops[0].color, opacity);
+ for (i = 0; i < 256; i++)
+ cache->colors[i] = color;
+ } else {
+ unsigned int ca, cb = 0;
+ float ua, ub, du, u;
+ int ia, ib, count;
+
+ ca = nsvg__applyOpacity(grad->stops[0].color, opacity);
+ ua = nsvg__clampf(grad->stops[0].offset, 0, 1);
+ ub = nsvg__clampf(grad->stops[grad->nstops-1].offset, ua, 1);
+ ia = (int)(ua * 255.0f);
+ ib = (int)(ub * 255.0f);
+ for (i = 0; i < ia; i++) {
+ cache->colors[i] = ca;
+ }
+
+ for (i = 0; i < grad->nstops-1; i++) {
+ ca = nsvg__applyOpacity(grad->stops[i].color, opacity);
+ cb = nsvg__applyOpacity(grad->stops[i+1].color, opacity);
+ ua = nsvg__clampf(grad->stops[i].offset, 0, 1);
+ ub = nsvg__clampf(grad->stops[i+1].offset, 0, 1);
+ ia = (int)(ua * 255.0f);
+ ib = (int)(ub * 255.0f);
+ count = ib - ia;
+ if (count <= 0) continue;
+ u = 0;
+ du = 1.0f / (float)count;
+ for (j = 0; j < count; j++) {
+ cache->colors[ia+j] = nsvg__lerpRGBA(ca,cb,u);
+ u += du;
+ }
+ }
+
+ for (i = ib; i < 256; i++)
+ cache->colors[i] = cb;
+ }
+
+}
+
+/*
+static void dumpEdges(NSVGrasterizer* r, const char* name)
+{
+ float xmin = 0, xmax = 0, ymin = 0, ymax = 0;
+ NSVGedge *e = NULL;
+ int i;
+ if (r->nedges == 0) return;
+ FILE* fp = fopen(name, "w");
+ if (fp == NULL) return;
+
+ xmin = xmax = r->edges[0].x0;
+ ymin = ymax = r->edges[0].y0;
+ for (i = 0; i < r->nedges; i++) {
+ e = &r->edges[i];
+ xmin = nsvg__minf(xmin, e->x0);
+ xmin = nsvg__minf(xmin, e->x1);
+ xmax = nsvg__maxf(xmax, e->x0);
+ xmax = nsvg__maxf(xmax, e->x1);
+ ymin = nsvg__minf(ymin, e->y0);
+ ymin = nsvg__minf(ymin, e->y1);
+ ymax = nsvg__maxf(ymax, e->y0);
+ ymax = nsvg__maxf(ymax, e->y1);
+ }
+
+ fprintf(fp, "");
+ fclose(fp);
+}
+*/
+
+void nsvgRasterize(NSVGrasterizer* r,
+ NSVGimage* image, float tx, float ty, float scale,
+ unsigned char* dst, int w, int h, int stride)
+{
+ NSVGshape *shape = NULL;
+ NSVGedge *e = NULL;
+ NSVGcachedPaint cache;
+ int i;
+
+ r->bitmap = dst;
+ r->width = w;
+ r->height = h;
+ r->stride = stride;
+
+ if (w > r->cscanline) {
+ r->cscanline = w;
+ r->scanline = (unsigned char*)realloc(r->scanline, w);
+ if (r->scanline == NULL) return;
+ }
+
+ for (i = 0; i < h; i++)
+ memset(&dst[i*stride], 0, w*4);
+
+ for (shape = image->shapes; shape != NULL; shape = shape->next) {
+ if (!(shape->flags & NSVG_FLAGS_VISIBLE))
+ continue;
+
+ if (shape->fill.type != NSVG_PAINT_NONE) {
+ nsvg__resetPool(r);
+ r->freelist = NULL;
+ r->nedges = 0;
+
+ nsvg__flattenShape(r, shape, scale);
+
+ // Scale and translate edges
+ for (i = 0; i < r->nedges; i++) {
+ e = &r->edges[i];
+ e->x0 = tx + e->x0;
+ e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES;
+ e->x1 = tx + e->x1;
+ e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES;
+ }
+
+ // Rasterize edges
+ if (r->nedges != 0)
+ qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge);
+
+ // now, traverse the scanlines and find the intersections on each scanline, use non-zero rule
+ nsvg__initPaint(&cache, &shape->fill, shape->opacity);
+
+ nsvg__rasterizeSortedEdges(r, tx,ty,scale, &cache, shape->fillRule);
+ }
+ if (shape->stroke.type != NSVG_PAINT_NONE && (shape->strokeWidth * scale) > 0.01f) {
+ nsvg__resetPool(r);
+ r->freelist = NULL;
+ r->nedges = 0;
+
+ nsvg__flattenShapeStroke(r, shape, scale);
+
+// dumpEdges(r, "edge.svg");
+
+ // Scale and translate edges
+ for (i = 0; i < r->nedges; i++) {
+ e = &r->edges[i];
+ e->x0 = tx + e->x0;
+ e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES;
+ e->x1 = tx + e->x1;
+ e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES;
+ }
+
+ // Rasterize edges
+ if (r->nedges != 0)
+ qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge);
+
+ // now, traverse the scanlines and find the intersections on each scanline, use non-zero rule
+ nsvg__initPaint(&cache, &shape->stroke, shape->opacity);
+
+ nsvg__rasterizeSortedEdges(r, tx,ty,scale, &cache, NSVG_FILLRULE_NONZERO);
+ }
+ }
+
+ nsvg__unpremultiplyAlpha(dst, w, h, stride);
+
+ r->bitmap = NULL;
+ r->width = 0;
+ r->height = 0;
+ r->stride = 0;
+}
+
+#endif // NANOSVGRAST_IMPLEMENTATION
+
+#endif // NANOSVGRAST_H
diff --git a/svg/stb_image_write.h b/svg/stb_image_write.h
new file mode 100644
index 0000000..e4b32ed
--- /dev/null
+++ b/svg/stb_image_write.h
@@ -0,0 +1,1724 @@
+/* stb_image_write - v1.16 - public domain - http://nothings.org/stb
+ writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015
+ no warranty implied; use at your own risk
+
+ Before #including,
+
+ #define STB_IMAGE_WRITE_IMPLEMENTATION
+
+ in the file that you want to have the implementation.
+
+ Will probably not work correctly with strict-aliasing optimizations.
+
+ABOUT:
+
+ This header file is a library for writing images to C stdio or a callback.
+
+ The PNG output is not optimal; it is 20-50% larger than the file
+ written by a decent optimizing implementation; though providing a custom
+ zlib compress function (see STBIW_ZLIB_COMPRESS) can mitigate that.
+ This library is designed for source code compactness and simplicity,
+ not optimal image file size or run-time performance.
+
+BUILDING:
+
+ You can #define STBIW_ASSERT(x) before the #include to avoid using assert.h.
+ You can #define STBIW_MALLOC(), STBIW_REALLOC(), and STBIW_FREE() to replace
+ malloc,realloc,free.
+ You can #define STBIW_MEMMOVE() to replace memmove()
+ You can #define STBIW_ZLIB_COMPRESS to use a custom zlib-style compress function
+ for PNG compression (instead of the builtin one), it must have the following signature:
+ unsigned char * my_compress(unsigned char *data, int data_len, int *out_len, int quality);
+ The returned data will be freed with STBIW_FREE() (free() by default),
+ so it must be heap allocated with STBIW_MALLOC() (malloc() by default),
+
+UNICODE:
+
+ If compiling for Windows and you wish to use Unicode filenames, compile
+ with
+ #define STBIW_WINDOWS_UTF8
+ and pass utf8-encoded filenames. Call stbiw_convert_wchar_to_utf8 to convert
+ Windows wchar_t filenames to utf8.
+
+USAGE:
+
+ There are five functions, one for each image file format:
+
+ int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes);
+ int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data);
+ int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data);
+ int stbi_write_jpg(char const *filename, int w, int h, int comp, const void *data, int quality);
+ int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data);
+
+ void stbi_flip_vertically_on_write(int flag); // flag is non-zero to flip data vertically
+
+ There are also five equivalent functions that use an arbitrary write function. You are
+ expected to open/close your file-equivalent before and after calling these:
+
+ int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes);
+ int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data);
+ int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data);
+ int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data);
+ int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality);
+
+ where the callback is:
+ void stbi_write_func(void *context, void *data, int size);
+
+ You can configure it with these global variables:
+ int stbi_write_tga_with_rle; // defaults to true; set to 0 to disable RLE
+ int stbi_write_png_compression_level; // defaults to 8; set to higher for more compression
+ int stbi_write_force_png_filter; // defaults to -1; set to 0..5 to force a filter mode
+
+
+ You can define STBI_WRITE_NO_STDIO to disable the file variant of these
+ functions, so the library will not use stdio.h at all. However, this will
+ also disable HDR writing, because it requires stdio for formatted output.
+
+ Each function returns 0 on failure and non-0 on success.
+
+ The functions create an image file defined by the parameters. The image
+ is a rectangle of pixels stored from left-to-right, top-to-bottom.
+ Each pixel contains 'comp' channels of data stored interleaved with 8-bits
+ per channel, in the following order: 1=Y, 2=YA, 3=RGB, 4=RGBA. (Y is
+ monochrome color.) The rectangle is 'w' pixels wide and 'h' pixels tall.
+ The *data pointer points to the first byte of the top-left-most pixel.
+ For PNG, "stride_in_bytes" is the distance in bytes from the first byte of
+ a row of pixels to the first byte of the next row of pixels.
+
+ PNG creates output files with the same number of components as the input.
+ The BMP format expands Y to RGB in the file format and does not
+ output alpha.
+
+ PNG supports writing rectangles of data even when the bytes storing rows of
+ data are not consecutive in memory (e.g. sub-rectangles of a larger image),
+ by supplying the stride between the beginning of adjacent rows. The other
+ formats do not. (Thus you cannot write a native-format BMP through the BMP
+ writer, both because it is in BGR order and because it may have padding
+ at the end of the line.)
+
+ PNG allows you to set the deflate compression level by setting the global
+ variable 'stbi_write_png_compression_level' (it defaults to 8).
+
+ HDR expects linear float data. Since the format is always 32-bit rgb(e)
+ data, alpha (if provided) is discarded, and for monochrome data it is
+ replicated across all three channels.
+
+ TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed
+ data, set the global variable 'stbi_write_tga_with_rle' to 0.
+
+ JPEG does ignore alpha channels in input data; quality is between 1 and 100.
+ Higher quality looks better but results in a bigger image.
+ JPEG baseline (no JPEG progressive).
+
+CREDITS:
+
+
+ Sean Barrett - PNG/BMP/TGA
+ Baldur Karlsson - HDR
+ Jean-Sebastien Guay - TGA monochrome
+ Tim Kelsey - misc enhancements
+ Alan Hickman - TGA RLE
+ Emmanuel Julien - initial file IO callback implementation
+ Jon Olick - original jo_jpeg.cpp code
+ Daniel Gibson - integrate JPEG, allow external zlib
+ Aarni Koskela - allow choosing PNG filter
+
+ bugfixes:
+ github:Chribba
+ Guillaume Chereau
+ github:jry2
+ github:romigrou
+ Sergio Gonzalez
+ Jonas Karlsson
+ Filip Wasil
+ Thatcher Ulrich
+ github:poppolopoppo
+ Patrick Boettcher
+ github:xeekworx
+ Cap Petschulat
+ Simon Rodriguez
+ Ivan Tikhonov
+ github:ignotion
+ Adam Schackart
+ Andrew Kensler
+
+LICENSE
+
+ See end of file for license information.
+
+*/
+
+#ifndef INCLUDE_STB_IMAGE_WRITE_H
+#define INCLUDE_STB_IMAGE_WRITE_H
+
+#include
+
+// if STB_IMAGE_WRITE_STATIC causes problems, try defining STBIWDEF to 'inline' or 'static inline'
+#ifndef STBIWDEF
+#ifdef STB_IMAGE_WRITE_STATIC
+#define STBIWDEF static
+#else
+#ifdef __cplusplus
+#define STBIWDEF extern "C"
+#else
+#define STBIWDEF extern
+#endif
+#endif
+#endif
+
+#ifndef STB_IMAGE_WRITE_STATIC // C++ forbids static forward declarations
+STBIWDEF int stbi_write_tga_with_rle;
+STBIWDEF int stbi_write_png_compression_level;
+STBIWDEF int stbi_write_force_png_filter;
+#endif
+
+#ifndef STBI_WRITE_NO_STDIO
+STBIWDEF int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes);
+STBIWDEF int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data);
+STBIWDEF int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data);
+STBIWDEF int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data);
+STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality);
+
+#ifdef STBIW_WINDOWS_UTF8
+STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input);
+#endif
+#endif
+
+typedef void stbi_write_func(void *context, void *data, int size);
+
+STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes);
+STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data);
+STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data);
+STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data);
+STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality);
+
+STBIWDEF void stbi_flip_vertically_on_write(int flip_boolean);
+
+#endif//INCLUDE_STB_IMAGE_WRITE_H
+
+#ifdef STB_IMAGE_WRITE_IMPLEMENTATION
+
+#ifdef _WIN32
+ #ifndef _CRT_SECURE_NO_WARNINGS
+ #define _CRT_SECURE_NO_WARNINGS
+ #endif
+ #ifndef _CRT_NONSTDC_NO_DEPRECATE
+ #define _CRT_NONSTDC_NO_DEPRECATE
+ #endif
+#endif
+
+#ifndef STBI_WRITE_NO_STDIO
+#include
+#endif // STBI_WRITE_NO_STDIO
+
+#include
+#include
+#include
+#include
+
+#if defined(STBIW_MALLOC) && defined(STBIW_FREE) && (defined(STBIW_REALLOC) || defined(STBIW_REALLOC_SIZED))
+// ok
+#elif !defined(STBIW_MALLOC) && !defined(STBIW_FREE) && !defined(STBIW_REALLOC) && !defined(STBIW_REALLOC_SIZED)
+// ok
+#else
+#error "Must define all or none of STBIW_MALLOC, STBIW_FREE, and STBIW_REALLOC (or STBIW_REALLOC_SIZED)."
+#endif
+
+#ifndef STBIW_MALLOC
+#define STBIW_MALLOC(sz) malloc(sz)
+#define STBIW_REALLOC(p,newsz) realloc(p,newsz)
+#define STBIW_FREE(p) free(p)
+#endif
+
+#ifndef STBIW_REALLOC_SIZED
+#define STBIW_REALLOC_SIZED(p,oldsz,newsz) STBIW_REALLOC(p,newsz)
+#endif
+
+
+#ifndef STBIW_MEMMOVE
+#define STBIW_MEMMOVE(a,b,sz) memmove(a,b,sz)
+#endif
+
+
+#ifndef STBIW_ASSERT
+#include
+#define STBIW_ASSERT(x) assert(x)
+#endif
+
+#define STBIW_UCHAR(x) (unsigned char) ((x) & 0xff)
+
+#ifdef STB_IMAGE_WRITE_STATIC
+static int stbi_write_png_compression_level = 8;
+static int stbi_write_tga_with_rle = 1;
+static int stbi_write_force_png_filter = -1;
+#else
+int stbi_write_png_compression_level = 8;
+int stbi_write_tga_with_rle = 1;
+int stbi_write_force_png_filter = -1;
+#endif
+
+static int stbi__flip_vertically_on_write = 0;
+
+STBIWDEF void stbi_flip_vertically_on_write(int flag)
+{
+ stbi__flip_vertically_on_write = flag;
+}
+
+typedef struct
+{
+ stbi_write_func *func;
+ void *context;
+ unsigned char buffer[64];
+ int buf_used;
+} stbi__write_context;
+
+// initialize a callback-based context
+static void stbi__start_write_callbacks(stbi__write_context *s, stbi_write_func *c, void *context)
+{
+ s->func = c;
+ s->context = context;
+}
+
+#ifndef STBI_WRITE_NO_STDIO
+
+static void stbi__stdio_write(void *context, void *data, int size)
+{
+ fwrite(data,1,size,(FILE*) context);
+}
+
+#if defined(_WIN32) && defined(STBIW_WINDOWS_UTF8)
+#ifdef __cplusplus
+#define STBIW_EXTERN extern "C"
+#else
+#define STBIW_EXTERN extern
+#endif
+STBIW_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide);
+STBIW_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default);
+
+STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input)
+{
+ return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL);
+}
+#endif
+
+static FILE *stbiw__fopen(char const *filename, char const *mode)
+{
+ FILE *f;
+#if defined(_WIN32) && defined(STBIW_WINDOWS_UTF8)
+ wchar_t wMode[64];
+ wchar_t wFilename[1024];
+ if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(*wFilename)))
+ return 0;
+
+ if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)/sizeof(*wMode)))
+ return 0;
+
+#if defined(_MSC_VER) && _MSC_VER >= 1400
+ if (0 != _wfopen_s(&f, wFilename, wMode))
+ f = 0;
+#else
+ f = _wfopen(wFilename, wMode);
+#endif
+
+#elif defined(_MSC_VER) && _MSC_VER >= 1400
+ if (0 != fopen_s(&f, filename, mode))
+ f=0;
+#else
+ f = fopen(filename, mode);
+#endif
+ return f;
+}
+
+static int stbi__start_write_file(stbi__write_context *s, const char *filename)
+{
+ FILE *f = stbiw__fopen(filename, "wb");
+ stbi__start_write_callbacks(s, stbi__stdio_write, (void *) f);
+ return f != NULL;
+}
+
+static void stbi__end_write_file(stbi__write_context *s)
+{
+ fclose((FILE *)s->context);
+}
+
+#endif // !STBI_WRITE_NO_STDIO
+
+typedef unsigned int stbiw_uint32;
+typedef int stb_image_write_test[sizeof(stbiw_uint32)==4 ? 1 : -1];
+
+static void stbiw__writefv(stbi__write_context *s, const char *fmt, va_list v)
+{
+ while (*fmt) {
+ switch (*fmt++) {
+ case ' ': break;
+ case '1': { unsigned char x = STBIW_UCHAR(va_arg(v, int));
+ s->func(s->context,&x,1);
+ break; }
+ case '2': { int x = va_arg(v,int);
+ unsigned char b[2];
+ b[0] = STBIW_UCHAR(x);
+ b[1] = STBIW_UCHAR(x>>8);
+ s->func(s->context,b,2);
+ break; }
+ case '4': { stbiw_uint32 x = va_arg(v,int);
+ unsigned char b[4];
+ b[0]=STBIW_UCHAR(x);
+ b[1]=STBIW_UCHAR(x>>8);
+ b[2]=STBIW_UCHAR(x>>16);
+ b[3]=STBIW_UCHAR(x>>24);
+ s->func(s->context,b,4);
+ break; }
+ default:
+ STBIW_ASSERT(0);
+ return;
+ }
+ }
+}
+
+static void stbiw__writef(stbi__write_context *s, const char *fmt, ...)
+{
+ va_list v;
+ va_start(v, fmt);
+ stbiw__writefv(s, fmt, v);
+ va_end(v);
+}
+
+static void stbiw__write_flush(stbi__write_context *s)
+{
+ if (s->buf_used) {
+ s->func(s->context, &s->buffer, s->buf_used);
+ s->buf_used = 0;
+ }
+}
+
+static void stbiw__putc(stbi__write_context *s, unsigned char c)
+{
+ s->func(s->context, &c, 1);
+}
+
+static void stbiw__write1(stbi__write_context *s, unsigned char a)
+{
+ if ((size_t)s->buf_used + 1 > sizeof(s->buffer))
+ stbiw__write_flush(s);
+ s->buffer[s->buf_used++] = a;
+}
+
+static void stbiw__write3(stbi__write_context *s, unsigned char a, unsigned char b, unsigned char c)
+{
+ int n;
+ if ((size_t)s->buf_used + 3 > sizeof(s->buffer))
+ stbiw__write_flush(s);
+ n = s->buf_used;
+ s->buf_used = n+3;
+ s->buffer[n+0] = a;
+ s->buffer[n+1] = b;
+ s->buffer[n+2] = c;
+}
+
+static void stbiw__write_pixel(stbi__write_context *s, int rgb_dir, int comp, int write_alpha, int expand_mono, unsigned char *d)
+{
+ unsigned char bg[3] = { 255, 0, 255}, px[3];
+ int k;
+
+ if (write_alpha < 0)
+ stbiw__write1(s, d[comp - 1]);
+
+ switch (comp) {
+ case 2: // 2 pixels = mono + alpha, alpha is written separately, so same as 1-channel case
+ case 1:
+ if (expand_mono)
+ stbiw__write3(s, d[0], d[0], d[0]); // monochrome bmp
+ else
+ stbiw__write1(s, d[0]); // monochrome TGA
+ break;
+ case 4:
+ if (!write_alpha) {
+ // composite against pink background
+ for (k = 0; k < 3; ++k)
+ px[k] = bg[k] + ((d[k] - bg[k]) * d[3]) / 255;
+ stbiw__write3(s, px[1 - rgb_dir], px[1], px[1 + rgb_dir]);
+ break;
+ }
+ /* FALLTHROUGH */
+ case 3:
+ stbiw__write3(s, d[1 - rgb_dir], d[1], d[1 + rgb_dir]);
+ break;
+ }
+ if (write_alpha > 0)
+ stbiw__write1(s, d[comp - 1]);
+}
+
+static void stbiw__write_pixels(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, void *data, int write_alpha, int scanline_pad, int expand_mono)
+{
+ stbiw_uint32 zero = 0;
+ int i,j, j_end;
+
+ if (y <= 0)
+ return;
+
+ if (stbi__flip_vertically_on_write)
+ vdir *= -1;
+
+ if (vdir < 0) {
+ j_end = -1; j = y-1;
+ } else {
+ j_end = y; j = 0;
+ }
+
+ for (; j != j_end; j += vdir) {
+ for (i=0; i < x; ++i) {
+ unsigned char *d = (unsigned char *) data + (j*x+i)*comp;
+ stbiw__write_pixel(s, rgb_dir, comp, write_alpha, expand_mono, d);
+ }
+ stbiw__write_flush(s);
+ s->func(s->context, &zero, scanline_pad);
+ }
+}
+
+static int stbiw__outfile(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, int expand_mono, void *data, int alpha, int pad, const char *fmt, ...)
+{
+ if (y < 0 || x < 0) {
+ return 0;
+ } else {
+ va_list v;
+ va_start(v, fmt);
+ stbiw__writefv(s, fmt, v);
+ va_end(v);
+ stbiw__write_pixels(s,rgb_dir,vdir,x,y,comp,data,alpha,pad, expand_mono);
+ return 1;
+ }
+}
+
+static int stbi_write_bmp_core(stbi__write_context *s, int x, int y, int comp, const void *data)
+{
+ if (comp != 4) {
+ // write RGB bitmap
+ int pad = (-x*3) & 3;
+ return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *) data,0,pad,
+ "11 4 22 4" "4 44 22 444444",
+ 'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header
+ 40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header
+ } else {
+ // RGBA bitmaps need a v4 header
+ // use BI_BITFIELDS mode with 32bpp and alpha mask
+ // (straight BI_RGB with alpha mask doesn't work in most readers)
+ return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *)data,1,0,
+ "11 4 22 4" "4 44 22 444444 4444 4 444 444 444 444",
+ 'B', 'M', 14+108+x*y*4, 0, 0, 14+108, // file header
+ 108, x,y, 1,32, 3,0,0,0,0,0, 0xff0000,0xff00,0xff,0xff000000u, 0, 0,0,0, 0,0,0, 0,0,0, 0,0,0); // bitmap V4 header
+ }
+}
+
+STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
+{
+ stbi__write_context s = { 0 };
+ stbi__start_write_callbacks(&s, func, context);
+ return stbi_write_bmp_core(&s, x, y, comp, data);
+}
+
+#ifndef STBI_WRITE_NO_STDIO
+STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
+{
+ stbi__write_context s = { 0 };
+ if (stbi__start_write_file(&s,filename)) {
+ int r = stbi_write_bmp_core(&s, x, y, comp, data);
+ stbi__end_write_file(&s);
+ return r;
+ } else
+ return 0;
+}
+#endif //!STBI_WRITE_NO_STDIO
+
+static int stbi_write_tga_core(stbi__write_context *s, int x, int y, int comp, void *data)
+{
+ int has_alpha = (comp == 2 || comp == 4);
+ int colorbytes = has_alpha ? comp-1 : comp;
+ int format = colorbytes < 2 ? 3 : 2; // 3 color channels (RGB/RGBA) = 2, 1 color channel (Y/YA) = 3
+
+ if (y < 0 || x < 0)
+ return 0;
+
+ if (!stbi_write_tga_with_rle) {
+ return stbiw__outfile(s, -1, -1, x, y, comp, 0, (void *) data, has_alpha, 0,
+ "111 221 2222 11", 0, 0, format, 0, 0, 0, 0, 0, x, y, (colorbytes + has_alpha) * 8, has_alpha * 8);
+ } else {
+ int i,j,k;
+ int jend, jdir;
+
+ stbiw__writef(s, "111 221 2222 11", 0,0,format+8, 0,0,0, 0,0,x,y, (colorbytes + has_alpha) * 8, has_alpha * 8);
+
+ if (stbi__flip_vertically_on_write) {
+ j = 0;
+ jend = y;
+ jdir = 1;
+ } else {
+ j = y-1;
+ jend = -1;
+ jdir = -1;
+ }
+ for (; j != jend; j += jdir) {
+ unsigned char *row = (unsigned char *) data + j * x * comp;
+ int len;
+
+ for (i = 0; i < x; i += len) {
+ unsigned char *begin = row + i * comp;
+ int diff = 1;
+ len = 1;
+
+ if (i < x - 1) {
+ ++len;
+ diff = memcmp(begin, row + (i + 1) * comp, comp);
+ if (diff) {
+ const unsigned char *prev = begin;
+ for (k = i + 2; k < x && len < 128; ++k) {
+ if (memcmp(prev, row + k * comp, comp)) {
+ prev += comp;
+ ++len;
+ } else {
+ --len;
+ break;
+ }
+ }
+ } else {
+ for (k = i + 2; k < x && len < 128; ++k) {
+ if (!memcmp(begin, row + k * comp, comp)) {
+ ++len;
+ } else {
+ break;
+ }
+ }
+ }
+ }
+
+ if (diff) {
+ unsigned char header = STBIW_UCHAR(len - 1);
+ stbiw__write1(s, header);
+ for (k = 0; k < len; ++k) {
+ stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin + k * comp);
+ }
+ } else {
+ unsigned char header = STBIW_UCHAR(len - 129);
+ stbiw__write1(s, header);
+ stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin);
+ }
+ }
+ }
+ stbiw__write_flush(s);
+ }
+ return 1;
+}
+
+STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
+{
+ stbi__write_context s = { 0 };
+ stbi__start_write_callbacks(&s, func, context);
+ return stbi_write_tga_core(&s, x, y, comp, (void *) data);
+}
+
+#ifndef STBI_WRITE_NO_STDIO
+STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
+{
+ stbi__write_context s = { 0 };
+ if (stbi__start_write_file(&s,filename)) {
+ int r = stbi_write_tga_core(&s, x, y, comp, (void *) data);
+ stbi__end_write_file(&s);
+ return r;
+ } else
+ return 0;
+}
+#endif
+
+// *************************************************************************************************
+// Radiance RGBE HDR writer
+// by Baldur Karlsson
+
+#define stbiw__max(a, b) ((a) > (b) ? (a) : (b))
+
+#ifndef STBI_WRITE_NO_STDIO
+
+static void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear)
+{
+ int exponent;
+ float maxcomp = stbiw__max(linear[0], stbiw__max(linear[1], linear[2]));
+
+ if (maxcomp < 1e-32f) {
+ rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0;
+ } else {
+ float normalize = (float) frexp(maxcomp, &exponent) * 256.0f/maxcomp;
+
+ rgbe[0] = (unsigned char)(linear[0] * normalize);
+ rgbe[1] = (unsigned char)(linear[1] * normalize);
+ rgbe[2] = (unsigned char)(linear[2] * normalize);
+ rgbe[3] = (unsigned char)(exponent + 128);
+ }
+}
+
+static void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char databyte)
+{
+ unsigned char lengthbyte = STBIW_UCHAR(length+128);
+ STBIW_ASSERT(length+128 <= 255);
+ s->func(s->context, &lengthbyte, 1);
+ s->func(s->context, &databyte, 1);
+}
+
+static void stbiw__write_dump_data(stbi__write_context *s, int length, unsigned char *data)
+{
+ unsigned char lengthbyte = STBIW_UCHAR(length);
+ STBIW_ASSERT(length <= 128); // inconsistent with spec but consistent with official code
+ s->func(s->context, &lengthbyte, 1);
+ s->func(s->context, data, length);
+}
+
+static void stbiw__write_hdr_scanline(stbi__write_context *s, int width, int ncomp, unsigned char *scratch, float *scanline)
+{
+ unsigned char scanlineheader[4] = { 2, 2, 0, 0 };
+ unsigned char rgbe[4];
+ float linear[3];
+ int x;
+
+ scanlineheader[2] = (width&0xff00)>>8;
+ scanlineheader[3] = (width&0x00ff);
+
+ /* skip RLE for images too small or large */
+ if (width < 8 || width >= 32768) {
+ for (x=0; x < width; x++) {
+ switch (ncomp) {
+ case 4: /* fallthrough */
+ case 3: linear[2] = scanline[x*ncomp + 2];
+ linear[1] = scanline[x*ncomp + 1];
+ linear[0] = scanline[x*ncomp + 0];
+ break;
+ default:
+ linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0];
+ break;
+ }
+ stbiw__linear_to_rgbe(rgbe, linear);
+ s->func(s->context, rgbe, 4);
+ }
+ } else {
+ int c,r;
+ /* encode into scratch buffer */
+ for (x=0; x < width; x++) {
+ switch(ncomp) {
+ case 4: /* fallthrough */
+ case 3: linear[2] = scanline[x*ncomp + 2];
+ linear[1] = scanline[x*ncomp + 1];
+ linear[0] = scanline[x*ncomp + 0];
+ break;
+ default:
+ linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0];
+ break;
+ }
+ stbiw__linear_to_rgbe(rgbe, linear);
+ scratch[x + width*0] = rgbe[0];
+ scratch[x + width*1] = rgbe[1];
+ scratch[x + width*2] = rgbe[2];
+ scratch[x + width*3] = rgbe[3];
+ }
+
+ s->func(s->context, scanlineheader, 4);
+
+ /* RLE each component separately */
+ for (c=0; c < 4; c++) {
+ unsigned char *comp = &scratch[width*c];
+
+ x = 0;
+ while (x < width) {
+ // find first run
+ r = x;
+ while (r+2 < width) {
+ if (comp[r] == comp[r+1] && comp[r] == comp[r+2])
+ break;
+ ++r;
+ }
+ if (r+2 >= width)
+ r = width;
+ // dump up to first run
+ while (x < r) {
+ int len = r-x;
+ if (len > 128) len = 128;
+ stbiw__write_dump_data(s, len, &comp[x]);
+ x += len;
+ }
+ // if there's a run, output it
+ if (r+2 < width) { // same test as what we break out of in search loop, so only true if we break'd
+ // find next byte after run
+ while (r < width && comp[r] == comp[x])
+ ++r;
+ // output run up to r
+ while (x < r) {
+ int len = r-x;
+ if (len > 127) len = 127;
+ stbiw__write_run_data(s, len, comp[x]);
+ x += len;
+ }
+ }
+ }
+ }
+ }
+}
+
+static int stbi_write_hdr_core(stbi__write_context *s, int x, int y, int comp, float *data)
+{
+ if (y <= 0 || x <= 0 || data == NULL)
+ return 0;
+ else {
+ // Each component is stored separately. Allocate scratch space for full output scanline.
+ unsigned char *scratch = (unsigned char *) STBIW_MALLOC(x*4);
+ int i, len;
+ char buffer[128];
+ char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n";
+ s->func(s->context, header, sizeof(header)-1);
+
+#ifdef __STDC_LIB_EXT1__
+ len = sprintf_s(buffer, sizeof(buffer), "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x);
+#else
+ len = sprintf(buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x);
+#endif
+ s->func(s->context, buffer, len);
+
+ for(i=0; i < y; i++)
+ stbiw__write_hdr_scanline(s, x, comp, scratch, data + comp*x*(stbi__flip_vertically_on_write ? y-1-i : i));
+ STBIW_FREE(scratch);
+ return 1;
+ }
+}
+
+STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data)
+{
+ stbi__write_context s = { 0 };
+ stbi__start_write_callbacks(&s, func, context);
+ return stbi_write_hdr_core(&s, x, y, comp, (float *) data);
+}
+
+STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data)
+{
+ stbi__write_context s = { 0 };
+ if (stbi__start_write_file(&s,filename)) {
+ int r = stbi_write_hdr_core(&s, x, y, comp, (float *) data);
+ stbi__end_write_file(&s);
+ return r;
+ } else
+ return 0;
+}
+#endif // STBI_WRITE_NO_STDIO
+
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// PNG writer
+//
+
+#ifndef STBIW_ZLIB_COMPRESS
+// stretchy buffer; stbiw__sbpush() == vector<>::push_back() -- stbiw__sbcount() == vector<>::size()
+#define stbiw__sbraw(a) ((int *) (void *) (a) - 2)
+#define stbiw__sbm(a) stbiw__sbraw(a)[0]
+#define stbiw__sbn(a) stbiw__sbraw(a)[1]
+
+#define stbiw__sbneedgrow(a,n) ((a)==0 || stbiw__sbn(a)+n >= stbiw__sbm(a))
+#define stbiw__sbmaybegrow(a,n) (stbiw__sbneedgrow(a,(n)) ? stbiw__sbgrow(a,n) : 0)
+#define stbiw__sbgrow(a,n) stbiw__sbgrowf((void **) &(a), (n), sizeof(*(a)))
+
+#define stbiw__sbpush(a, v) (stbiw__sbmaybegrow(a,1), (a)[stbiw__sbn(a)++] = (v))
+#define stbiw__sbcount(a) ((a) ? stbiw__sbn(a) : 0)
+#define stbiw__sbfree(a) ((a) ? STBIW_FREE(stbiw__sbraw(a)),0 : 0)
+
+static void *stbiw__sbgrowf(void **arr, int increment, int itemsize)
+{
+ int m = *arr ? 2*stbiw__sbm(*arr)+increment : increment+1;
+ void *p = STBIW_REALLOC_SIZED(*arr ? stbiw__sbraw(*arr) : 0, *arr ? (stbiw__sbm(*arr)*itemsize + sizeof(int)*2) : 0, itemsize * m + sizeof(int)*2);
+ STBIW_ASSERT(p);
+ if (p) {
+ if (!*arr) ((int *) p)[1] = 0;
+ *arr = (void *) ((int *) p + 2);
+ stbiw__sbm(*arr) = m;
+ }
+ return *arr;
+}
+
+static unsigned char *stbiw__zlib_flushf(unsigned char *data, unsigned int *bitbuffer, int *bitcount)
+{
+ while (*bitcount >= 8) {
+ stbiw__sbpush(data, STBIW_UCHAR(*bitbuffer));
+ *bitbuffer >>= 8;
+ *bitcount -= 8;
+ }
+ return data;
+}
+
+static int stbiw__zlib_bitrev(int code, int codebits)
+{
+ int res=0;
+ while (codebits--) {
+ res = (res << 1) | (code & 1);
+ code >>= 1;
+ }
+ return res;
+}
+
+static unsigned int stbiw__zlib_countm(unsigned char *a, unsigned char *b, int limit)
+{
+ int i;
+ for (i=0; i < limit && i < 258; ++i)
+ if (a[i] != b[i]) break;
+ return i;
+}
+
+static unsigned int stbiw__zhash(unsigned char *data)
+{
+ stbiw_uint32 hash = data[0] + (data[1] << 8) + (data[2] << 16);
+ hash ^= hash << 3;
+ hash += hash >> 5;
+ hash ^= hash << 4;
+ hash += hash >> 17;
+ hash ^= hash << 25;
+ hash += hash >> 6;
+ return hash;
+}
+
+#define stbiw__zlib_flush() (out = stbiw__zlib_flushf(out, &bitbuf, &bitcount))
+#define stbiw__zlib_add(code,codebits) \
+ (bitbuf |= (code) << bitcount, bitcount += (codebits), stbiw__zlib_flush())
+#define stbiw__zlib_huffa(b,c) stbiw__zlib_add(stbiw__zlib_bitrev(b,c),c)
+// default huffman tables
+#define stbiw__zlib_huff1(n) stbiw__zlib_huffa(0x30 + (n), 8)
+#define stbiw__zlib_huff2(n) stbiw__zlib_huffa(0x190 + (n)-144, 9)
+#define stbiw__zlib_huff3(n) stbiw__zlib_huffa(0 + (n)-256,7)
+#define stbiw__zlib_huff4(n) stbiw__zlib_huffa(0xc0 + (n)-280,8)
+#define stbiw__zlib_huff(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : (n) <= 255 ? stbiw__zlib_huff2(n) : (n) <= 279 ? stbiw__zlib_huff3(n) : stbiw__zlib_huff4(n))
+#define stbiw__zlib_huffb(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : stbiw__zlib_huff2(n))
+
+#define stbiw__ZHASH 16384
+
+#endif // STBIW_ZLIB_COMPRESS
+
+STBIWDEF unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, int *out_len, int quality)
+{
+#ifdef STBIW_ZLIB_COMPRESS
+ // user provided a zlib compress implementation, use that
+ return STBIW_ZLIB_COMPRESS(data, data_len, out_len, quality);
+#else // use builtin
+ static unsigned short lengthc[] = { 3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,43,51,59,67,83,99,115,131,163,195,227,258, 259 };
+ static unsigned char lengtheb[]= { 0,0,0,0,0,0,0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0 };
+ static unsigned short distc[] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577, 32768 };
+ static unsigned char disteb[] = { 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13 };
+ unsigned int bitbuf=0;
+ int i,j, bitcount=0;
+ unsigned char *out = NULL;
+ unsigned char ***hash_table = (unsigned char***) STBIW_MALLOC(stbiw__ZHASH * sizeof(unsigned char**));
+ if (hash_table == NULL)
+ return NULL;
+ if (quality < 5) quality = 5;
+
+ stbiw__sbpush(out, 0x78); // DEFLATE 32K window
+ stbiw__sbpush(out, 0x5e); // FLEVEL = 1
+ stbiw__zlib_add(1,1); // BFINAL = 1
+ stbiw__zlib_add(1,2); // BTYPE = 1 -- fixed huffman
+
+ for (i=0; i < stbiw__ZHASH; ++i)
+ hash_table[i] = NULL;
+
+ i=0;
+ while (i < data_len-3) {
+ // hash next 3 bytes of data to be compressed
+ int h = stbiw__zhash(data+i)&(stbiw__ZHASH-1), best=3;
+ unsigned char *bestloc = 0;
+ unsigned char **hlist = hash_table[h];
+ int n = stbiw__sbcount(hlist);
+ for (j=0; j < n; ++j) {
+ if (hlist[j]-data > i-32768) { // if entry lies within window
+ int d = stbiw__zlib_countm(hlist[j], data+i, data_len-i);
+ if (d >= best) { best=d; bestloc=hlist[j]; }
+ }
+ }
+ // when hash table entry is too long, delete half the entries
+ if (hash_table[h] && stbiw__sbn(hash_table[h]) == 2*quality) {
+ STBIW_MEMMOVE(hash_table[h], hash_table[h]+quality, sizeof(hash_table[h][0])*quality);
+ stbiw__sbn(hash_table[h]) = quality;
+ }
+ stbiw__sbpush(hash_table[h],data+i);
+
+ if (bestloc) {
+ // "lazy matching" - check match at *next* byte, and if it's better, do cur byte as literal
+ h = stbiw__zhash(data+i+1)&(stbiw__ZHASH-1);
+ hlist = hash_table[h];
+ n = stbiw__sbcount(hlist);
+ for (j=0; j < n; ++j) {
+ if (hlist[j]-data > i-32767) {
+ int e = stbiw__zlib_countm(hlist[j], data+i+1, data_len-i-1);
+ if (e > best) { // if next match is better, bail on current match
+ bestloc = NULL;
+ break;
+ }
+ }
+ }
+ }
+
+ if (bestloc) {
+ int d = (int) (data+i - bestloc); // distance back
+ STBIW_ASSERT(d <= 32767 && best <= 258);
+ for (j=0; best > lengthc[j+1]-1; ++j);
+ stbiw__zlib_huff(j+257);
+ if (lengtheb[j]) stbiw__zlib_add(best - lengthc[j], lengtheb[j]);
+ for (j=0; d > distc[j+1]-1; ++j);
+ stbiw__zlib_add(stbiw__zlib_bitrev(j,5),5);
+ if (disteb[j]) stbiw__zlib_add(d - distc[j], disteb[j]);
+ i += best;
+ } else {
+ stbiw__zlib_huffb(data[i]);
+ ++i;
+ }
+ }
+ // write out final bytes
+ for (;i < data_len; ++i)
+ stbiw__zlib_huffb(data[i]);
+ stbiw__zlib_huff(256); // end of block
+ // pad with 0 bits to byte boundary
+ while (bitcount)
+ stbiw__zlib_add(0,1);
+
+ for (i=0; i < stbiw__ZHASH; ++i)
+ (void) stbiw__sbfree(hash_table[i]);
+ STBIW_FREE(hash_table);
+
+ // store uncompressed instead if compression was worse
+ if (stbiw__sbn(out) > data_len + 2 + ((data_len+32766)/32767)*5) {
+ stbiw__sbn(out) = 2; // truncate to DEFLATE 32K window and FLEVEL = 1
+ for (j = 0; j < data_len;) {
+ int blocklen = data_len - j;
+ if (blocklen > 32767) blocklen = 32767;
+ stbiw__sbpush(out, data_len - j == blocklen); // BFINAL = ?, BTYPE = 0 -- no compression
+ stbiw__sbpush(out, STBIW_UCHAR(blocklen)); // LEN
+ stbiw__sbpush(out, STBIW_UCHAR(blocklen >> 8));
+ stbiw__sbpush(out, STBIW_UCHAR(~blocklen)); // NLEN
+ stbiw__sbpush(out, STBIW_UCHAR(~blocklen >> 8));
+ memcpy(out+stbiw__sbn(out), data+j, blocklen);
+ stbiw__sbn(out) += blocklen;
+ j += blocklen;
+ }
+ }
+
+ {
+ // compute adler32 on input
+ unsigned int s1=1, s2=0;
+ int blocklen = (int) (data_len % 5552);
+ j=0;
+ while (j < data_len) {
+ for (i=0; i < blocklen; ++i) { s1 += data[j+i]; s2 += s1; }
+ s1 %= 65521; s2 %= 65521;
+ j += blocklen;
+ blocklen = 5552;
+ }
+ stbiw__sbpush(out, STBIW_UCHAR(s2 >> 8));
+ stbiw__sbpush(out, STBIW_UCHAR(s2));
+ stbiw__sbpush(out, STBIW_UCHAR(s1 >> 8));
+ stbiw__sbpush(out, STBIW_UCHAR(s1));
+ }
+ *out_len = stbiw__sbn(out);
+ // make returned pointer freeable
+ STBIW_MEMMOVE(stbiw__sbraw(out), out, *out_len);
+ return (unsigned char *) stbiw__sbraw(out);
+#endif // STBIW_ZLIB_COMPRESS
+}
+
+static unsigned int stbiw__crc32(unsigned char *buffer, int len)
+{
+#ifdef STBIW_CRC32
+ return STBIW_CRC32(buffer, len);
+#else
+ static unsigned int crc_table[256] =
+ {
+ 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
+ 0x0eDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
+ 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
+ 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
+ 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
+ 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
+ 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
+ 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
+ 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
+ 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
+ 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
+ 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
+ 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
+ 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
+ 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
+ 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
+ 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
+ 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
+ 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
+ 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
+ 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
+ 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
+ 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
+ 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
+ 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
+ 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
+ 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
+ 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
+ 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
+ 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
+ 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
+ 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
+ };
+
+ unsigned int crc = ~0u;
+ int i;
+ for (i=0; i < len; ++i)
+ crc = (crc >> 8) ^ crc_table[buffer[i] ^ (crc & 0xff)];
+ return ~crc;
+#endif
+}
+
+#define stbiw__wpng4(o,a,b,c,d) ((o)[0]=STBIW_UCHAR(a),(o)[1]=STBIW_UCHAR(b),(o)[2]=STBIW_UCHAR(c),(o)[3]=STBIW_UCHAR(d),(o)+=4)
+#define stbiw__wp32(data,v) stbiw__wpng4(data, (v)>>24,(v)>>16,(v)>>8,(v));
+#define stbiw__wptag(data,s) stbiw__wpng4(data, s[0],s[1],s[2],s[3])
+
+static void stbiw__wpcrc(unsigned char **data, int len)
+{
+ unsigned int crc = stbiw__crc32(*data - len - 4, len+4);
+ stbiw__wp32(*data, crc);
+}
+
+static unsigned char stbiw__paeth(int a, int b, int c)
+{
+ int p = a + b - c, pa = abs(p-a), pb = abs(p-b), pc = abs(p-c);
+ if (pa <= pb && pa <= pc) return STBIW_UCHAR(a);
+ if (pb <= pc) return STBIW_UCHAR(b);
+ return STBIW_UCHAR(c);
+}
+
+// @OPTIMIZE: provide an option that always forces left-predict or paeth predict
+static void stbiw__encode_png_line(unsigned char *pixels, int stride_bytes, int width, int height, int y, int n, int filter_type, signed char *line_buffer)
+{
+ static int mapping[] = { 0,1,2,3,4 };
+ static int firstmap[] = { 0,1,0,5,6 };
+ int *mymap = (y != 0) ? mapping : firstmap;
+ int i;
+ int type = mymap[filter_type];
+ unsigned char *z = pixels + stride_bytes * (stbi__flip_vertically_on_write ? height-1-y : y);
+ int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes;
+
+ if (type==0) {
+ memcpy(line_buffer, z, width*n);
+ return;
+ }
+
+ // first loop isn't optimized since it's just one pixel
+ for (i = 0; i < n; ++i) {
+ switch (type) {
+ case 1: line_buffer[i] = z[i]; break;
+ case 2: line_buffer[i] = z[i] - z[i-signed_stride]; break;
+ case 3: line_buffer[i] = z[i] - (z[i-signed_stride]>>1); break;
+ case 4: line_buffer[i] = (signed char) (z[i] - stbiw__paeth(0,z[i-signed_stride],0)); break;
+ case 5: line_buffer[i] = z[i]; break;
+ case 6: line_buffer[i] = z[i]; break;
+ }
+ }
+ switch (type) {
+ case 1: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-n]; break;
+ case 2: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-signed_stride]; break;
+ case 3: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - ((z[i-n] + z[i-signed_stride])>>1); break;
+ case 4: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], z[i-signed_stride], z[i-signed_stride-n]); break;
+ case 5: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - (z[i-n]>>1); break;
+ case 6: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], 0,0); break;
+ }
+}
+
+STBIWDEF unsigned char *stbi_write_png_to_mem(const unsigned char *pixels, int stride_bytes, int x, int y, int n, int *out_len)
+{
+ int force_filter = stbi_write_force_png_filter;
+ int ctype[5] = { -1, 0, 4, 2, 6 };
+ unsigned char sig[8] = { 137,80,78,71,13,10,26,10 };
+ unsigned char *out,*o, *filt, *zlib;
+ signed char *line_buffer;
+ int j,zlen;
+
+ if (stride_bytes == 0)
+ stride_bytes = x * n;
+
+ if (force_filter >= 5) {
+ force_filter = -1;
+ }
+
+ filt = (unsigned char *) STBIW_MALLOC((x*n+1) * y); if (!filt) return 0;
+ line_buffer = (signed char *) STBIW_MALLOC(x * n); if (!line_buffer) { STBIW_FREE(filt); return 0; }
+ for (j=0; j < y; ++j) {
+ int filter_type;
+ if (force_filter > -1) {
+ filter_type = force_filter;
+ stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, force_filter, line_buffer);
+ } else { // Estimate the best filter by running through all of them:
+ int best_filter = 0, best_filter_val = 0x7fffffff, est, i;
+ for (filter_type = 0; filter_type < 5; filter_type++) {
+ stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, filter_type, line_buffer);
+
+ // Estimate the entropy of the line using this filter; the less, the better.
+ est = 0;
+ for (i = 0; i < x*n; ++i) {
+ est += abs((signed char) line_buffer[i]);
+ }
+ if (est < best_filter_val) {
+ best_filter_val = est;
+ best_filter = filter_type;
+ }
+ }
+ if (filter_type != best_filter) { // If the last iteration already got us the best filter, don't redo it
+ stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, best_filter, line_buffer);
+ filter_type = best_filter;
+ }
+ }
+ // when we get here, filter_type contains the filter type, and line_buffer contains the data
+ filt[j*(x*n+1)] = (unsigned char) filter_type;
+ STBIW_MEMMOVE(filt+j*(x*n+1)+1, line_buffer, x*n);
+ }
+ STBIW_FREE(line_buffer);
+ zlib = stbi_zlib_compress(filt, y*( x*n+1), &zlen, stbi_write_png_compression_level);
+ STBIW_FREE(filt);
+ if (!zlib) return 0;
+
+ // each tag requires 12 bytes of overhead
+ out = (unsigned char *) STBIW_MALLOC(8 + 12+13 + 12+zlen + 12);
+ if (!out) return 0;
+ *out_len = 8 + 12+13 + 12+zlen + 12;
+
+ o=out;
+ STBIW_MEMMOVE(o,sig,8); o+= 8;
+ stbiw__wp32(o, 13); // header length
+ stbiw__wptag(o, "IHDR");
+ stbiw__wp32(o, x);
+ stbiw__wp32(o, y);
+ *o++ = 8;
+ *o++ = STBIW_UCHAR(ctype[n]);
+ *o++ = 0;
+ *o++ = 0;
+ *o++ = 0;
+ stbiw__wpcrc(&o,13);
+
+ stbiw__wp32(o, zlen);
+ stbiw__wptag(o, "IDAT");
+ STBIW_MEMMOVE(o, zlib, zlen);
+ o += zlen;
+ STBIW_FREE(zlib);
+ stbiw__wpcrc(&o, zlen);
+
+ stbiw__wp32(o,0);
+ stbiw__wptag(o, "IEND");
+ stbiw__wpcrc(&o,0);
+
+ STBIW_ASSERT(o == out + *out_len);
+
+ return out;
+}
+
+#ifndef STBI_WRITE_NO_STDIO
+STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
+{
+ FILE *f;
+ int len;
+ unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len);
+ if (png == NULL) return 0;
+
+ f = stbiw__fopen(filename, "wb");
+ if (!f) { STBIW_FREE(png); return 0; }
+ fwrite(png, 1, len, f);
+ fclose(f);
+ STBIW_FREE(png);
+ return 1;
+}
+#endif
+
+STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
+{
+ int len;
+ unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len);
+ if (png == NULL) return 0;
+ func(context, png, len);
+ STBIW_FREE(png);
+ return 1;
+}
+
+
+/* ***************************************************************************
+ *
+ * JPEG writer
+ *
+ * This is based on Jon Olick's jo_jpeg.cpp:
+ * public domain Simple, Minimalistic JPEG writer - http://www.jonolick.com/code.html
+ */
+
+static const unsigned char stbiw__jpg_ZigZag[] = { 0,1,5,6,14,15,27,28,2,4,7,13,16,26,29,42,3,8,12,17,25,30,41,43,9,11,18,
+ 24,31,40,44,53,10,19,23,32,39,45,52,54,20,22,33,38,46,51,55,60,21,34,37,47,50,56,59,61,35,36,48,49,57,58,62,63 };
+
+static void stbiw__jpg_writeBits(stbi__write_context *s, int *bitBufP, int *bitCntP, const unsigned short *bs) {
+ int bitBuf = *bitBufP, bitCnt = *bitCntP;
+ bitCnt += bs[1];
+ bitBuf |= bs[0] << (24 - bitCnt);
+ while(bitCnt >= 8) {
+ unsigned char c = (bitBuf >> 16) & 255;
+ stbiw__putc(s, c);
+ if(c == 255) {
+ stbiw__putc(s, 0);
+ }
+ bitBuf <<= 8;
+ bitCnt -= 8;
+ }
+ *bitBufP = bitBuf;
+ *bitCntP = bitCnt;
+}
+
+static void stbiw__jpg_DCT(float *d0p, float *d1p, float *d2p, float *d3p, float *d4p, float *d5p, float *d6p, float *d7p) {
+ float d0 = *d0p, d1 = *d1p, d2 = *d2p, d3 = *d3p, d4 = *d4p, d5 = *d5p, d6 = *d6p, d7 = *d7p;
+ float z1, z2, z3, z4, z5, z11, z13;
+
+ float tmp0 = d0 + d7;
+ float tmp7 = d0 - d7;
+ float tmp1 = d1 + d6;
+ float tmp6 = d1 - d6;
+ float tmp2 = d2 + d5;
+ float tmp5 = d2 - d5;
+ float tmp3 = d3 + d4;
+ float tmp4 = d3 - d4;
+
+ // Even part
+ float tmp10 = tmp0 + tmp3; // phase 2
+ float tmp13 = tmp0 - tmp3;
+ float tmp11 = tmp1 + tmp2;
+ float tmp12 = tmp1 - tmp2;
+
+ d0 = tmp10 + tmp11; // phase 3
+ d4 = tmp10 - tmp11;
+
+ z1 = (tmp12 + tmp13) * 0.707106781f; // c4
+ d2 = tmp13 + z1; // phase 5
+ d6 = tmp13 - z1;
+
+ // Odd part
+ tmp10 = tmp4 + tmp5; // phase 2
+ tmp11 = tmp5 + tmp6;
+ tmp12 = tmp6 + tmp7;
+
+ // The rotator is modified from fig 4-8 to avoid extra negations.
+ z5 = (tmp10 - tmp12) * 0.382683433f; // c6
+ z2 = tmp10 * 0.541196100f + z5; // c2-c6
+ z4 = tmp12 * 1.306562965f + z5; // c2+c6
+ z3 = tmp11 * 0.707106781f; // c4
+
+ z11 = tmp7 + z3; // phase 5
+ z13 = tmp7 - z3;
+
+ *d5p = z13 + z2; // phase 6
+ *d3p = z13 - z2;
+ *d1p = z11 + z4;
+ *d7p = z11 - z4;
+
+ *d0p = d0; *d2p = d2; *d4p = d4; *d6p = d6;
+}
+
+static void stbiw__jpg_calcBits(int val, unsigned short bits[2]) {
+ int tmp1 = val < 0 ? -val : val;
+ val = val < 0 ? val-1 : val;
+ bits[1] = 1;
+ while(tmp1 >>= 1) {
+ ++bits[1];
+ }
+ bits[0] = val & ((1<0)&&(DU[end0pos]==0); --end0pos) {
+ }
+ // end0pos = first element in reverse order !=0
+ if(end0pos == 0) {
+ stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB);
+ return DU[0];
+ }
+ for(i = 1; i <= end0pos; ++i) {
+ int startpos = i;
+ int nrzeroes;
+ unsigned short bits[2];
+ for (; DU[i]==0 && i<=end0pos; ++i) {
+ }
+ nrzeroes = i-startpos;
+ if ( nrzeroes >= 16 ) {
+ int lng = nrzeroes>>4;
+ int nrmarker;
+ for (nrmarker=1; nrmarker <= lng; ++nrmarker)
+ stbiw__jpg_writeBits(s, bitBuf, bitCnt, M16zeroes);
+ nrzeroes &= 15;
+ }
+ stbiw__jpg_calcBits(DU[i], bits);
+ stbiw__jpg_writeBits(s, bitBuf, bitCnt, HTAC[(nrzeroes<<4)+bits[1]]);
+ stbiw__jpg_writeBits(s, bitBuf, bitCnt, bits);
+ }
+ if(end0pos != 63) {
+ stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB);
+ }
+ return DU[0];
+}
+
+static int stbi_write_jpg_core(stbi__write_context *s, int width, int height, int comp, const void* data, int quality) {
+ // Constants that don't pollute global namespace
+ static const unsigned char std_dc_luminance_nrcodes[] = {0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0};
+ static const unsigned char std_dc_luminance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11};
+ static const unsigned char std_ac_luminance_nrcodes[] = {0,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d};
+ static const unsigned char std_ac_luminance_values[] = {
+ 0x01,0x02,0x03,0x00,0x04,0x11,0x05,0x12,0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07,0x22,0x71,0x14,0x32,0x81,0x91,0xa1,0x08,
+ 0x23,0x42,0xb1,0xc1,0x15,0x52,0xd1,0xf0,0x24,0x33,0x62,0x72,0x82,0x09,0x0a,0x16,0x17,0x18,0x19,0x1a,0x25,0x26,0x27,0x28,
+ 0x29,0x2a,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58,0x59,
+ 0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x83,0x84,0x85,0x86,0x87,0x88,0x89,
+ 0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,0xb5,0xb6,
+ 0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xe1,0xe2,
+ 0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa
+ };
+ static const unsigned char std_dc_chrominance_nrcodes[] = {0,0,3,1,1,1,1,1,1,1,1,1,0,0,0,0,0};
+ static const unsigned char std_dc_chrominance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11};
+ static const unsigned char std_ac_chrominance_nrcodes[] = {0,0,2,1,2,4,4,3,4,7,5,4,4,0,1,2,0x77};
+ static const unsigned char std_ac_chrominance_values[] = {
+ 0x00,0x01,0x02,0x03,0x11,0x04,0x05,0x21,0x31,0x06,0x12,0x41,0x51,0x07,0x61,0x71,0x13,0x22,0x32,0x81,0x08,0x14,0x42,0x91,
+ 0xa1,0xb1,0xc1,0x09,0x23,0x33,0x52,0xf0,0x15,0x62,0x72,0xd1,0x0a,0x16,0x24,0x34,0xe1,0x25,0xf1,0x17,0x18,0x19,0x1a,0x26,
+ 0x27,0x28,0x29,0x2a,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58,
+ 0x59,0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x82,0x83,0x84,0x85,0x86,0x87,
+ 0x88,0x89,0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,
+ 0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,
+ 0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa
+ };
+ // Huffman tables
+ static const unsigned short YDC_HT[256][2] = { {0,2},{2,3},{3,3},{4,3},{5,3},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9}};
+ static const unsigned short UVDC_HT[256][2] = { {0,2},{1,2},{2,2},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9},{1022,10},{2046,11}};
+ static const unsigned short YAC_HT[256][2] = {
+ {10,4},{0,2},{1,2},{4,3},{11,4},{26,5},{120,7},{248,8},{1014,10},{65410,16},{65411,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {12,4},{27,5},{121,7},{502,9},{2038,11},{65412,16},{65413,16},{65414,16},{65415,16},{65416,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {28,5},{249,8},{1015,10},{4084,12},{65417,16},{65418,16},{65419,16},{65420,16},{65421,16},{65422,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {58,6},{503,9},{4085,12},{65423,16},{65424,16},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {59,6},{1016,10},{65430,16},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {122,7},{2039,11},{65438,16},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {123,7},{4086,12},{65446,16},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {250,8},{4087,12},{65454,16},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {504,9},{32704,15},{65462,16},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {505,9},{65470,16},{65471,16},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {506,9},{65479,16},{65480,16},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {1017,10},{65488,16},{65489,16},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {1018,10},{65497,16},{65498,16},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {2040,11},{65506,16},{65507,16},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {65515,16},{65516,16},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {2041,11},{65525,16},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0}
+ };
+ static const unsigned short UVAC_HT[256][2] = {
+ {0,2},{1,2},{4,3},{10,4},{24,5},{25,5},{56,6},{120,7},{500,9},{1014,10},{4084,12},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {11,4},{57,6},{246,8},{501,9},{2038,11},{4085,12},{65416,16},{65417,16},{65418,16},{65419,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {26,5},{247,8},{1015,10},{4086,12},{32706,15},{65420,16},{65421,16},{65422,16},{65423,16},{65424,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {27,5},{248,8},{1016,10},{4087,12},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{65430,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {58,6},{502,9},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{65438,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {59,6},{1017,10},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{65446,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {121,7},{2039,11},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{65454,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {122,7},{2040,11},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{65462,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {249,8},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{65470,16},{65471,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {503,9},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{65479,16},{65480,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {504,9},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{65488,16},{65489,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {505,9},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{65497,16},{65498,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {506,9},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{65506,16},{65507,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {2041,11},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{65515,16},{65516,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {16352,14},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{65525,16},{0,0},{0,0},{0,0},{0,0},{0,0},
+ {1018,10},{32707,15},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0}
+ };
+ static const int YQT[] = {16,11,10,16,24,40,51,61,12,12,14,19,26,58,60,55,14,13,16,24,40,57,69,56,14,17,22,29,51,87,80,62,18,22,
+ 37,56,68,109,103,77,24,35,55,64,81,104,113,92,49,64,78,87,103,121,120,101,72,92,95,98,112,100,103,99};
+ static const int UVQT[] = {17,18,24,47,99,99,99,99,18,21,26,66,99,99,99,99,24,26,56,99,99,99,99,99,47,66,99,99,99,99,99,99,
+ 99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99};
+ static const float aasf[] = { 1.0f * 2.828427125f, 1.387039845f * 2.828427125f, 1.306562965f * 2.828427125f, 1.175875602f * 2.828427125f,
+ 1.0f * 2.828427125f, 0.785694958f * 2.828427125f, 0.541196100f * 2.828427125f, 0.275899379f * 2.828427125f };
+
+ int row, col, i, k, subsample;
+ float fdtbl_Y[64], fdtbl_UV[64];
+ unsigned char YTable[64], UVTable[64];
+
+ if(!data || !width || !height || comp > 4 || comp < 1) {
+ return 0;
+ }
+
+ quality = quality ? quality : 90;
+ subsample = quality <= 90 ? 1 : 0;
+ quality = quality < 1 ? 1 : quality > 100 ? 100 : quality;
+ quality = quality < 50 ? 5000 / quality : 200 - quality * 2;
+
+ for(i = 0; i < 64; ++i) {
+ int uvti, yti = (YQT[i]*quality+50)/100;
+ YTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (yti < 1 ? 1 : yti > 255 ? 255 : yti);
+ uvti = (UVQT[i]*quality+50)/100;
+ UVTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (uvti < 1 ? 1 : uvti > 255 ? 255 : uvti);
+ }
+
+ for(row = 0, k = 0; row < 8; ++row) {
+ for(col = 0; col < 8; ++col, ++k) {
+ fdtbl_Y[k] = 1 / (YTable [stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]);
+ fdtbl_UV[k] = 1 / (UVTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]);
+ }
+ }
+
+ // Write Headers
+ {
+ static const unsigned char head0[] = { 0xFF,0xD8,0xFF,0xE0,0,0x10,'J','F','I','F',0,1,1,0,0,1,0,1,0,0,0xFF,0xDB,0,0x84,0 };
+ static const unsigned char head2[] = { 0xFF,0xDA,0,0xC,3,1,0,2,0x11,3,0x11,0,0x3F,0 };
+ const unsigned char head1[] = { 0xFF,0xC0,0,0x11,8,(unsigned char)(height>>8),STBIW_UCHAR(height),(unsigned char)(width>>8),STBIW_UCHAR(width),
+ 3,1,(unsigned char)(subsample?0x22:0x11),0,2,0x11,1,3,0x11,1,0xFF,0xC4,0x01,0xA2,0 };
+ s->func(s->context, (void*)head0, sizeof(head0));
+ s->func(s->context, (void*)YTable, sizeof(YTable));
+ stbiw__putc(s, 1);
+ s->func(s->context, UVTable, sizeof(UVTable));
+ s->func(s->context, (void*)head1, sizeof(head1));
+ s->func(s->context, (void*)(std_dc_luminance_nrcodes+1), sizeof(std_dc_luminance_nrcodes)-1);
+ s->func(s->context, (void*)std_dc_luminance_values, sizeof(std_dc_luminance_values));
+ stbiw__putc(s, 0x10); // HTYACinfo
+ s->func(s->context, (void*)(std_ac_luminance_nrcodes+1), sizeof(std_ac_luminance_nrcodes)-1);
+ s->func(s->context, (void*)std_ac_luminance_values, sizeof(std_ac_luminance_values));
+ stbiw__putc(s, 1); // HTUDCinfo
+ s->func(s->context, (void*)(std_dc_chrominance_nrcodes+1), sizeof(std_dc_chrominance_nrcodes)-1);
+ s->func(s->context, (void*)std_dc_chrominance_values, sizeof(std_dc_chrominance_values));
+ stbiw__putc(s, 0x11); // HTUACinfo
+ s->func(s->context, (void*)(std_ac_chrominance_nrcodes+1), sizeof(std_ac_chrominance_nrcodes)-1);
+ s->func(s->context, (void*)std_ac_chrominance_values, sizeof(std_ac_chrominance_values));
+ s->func(s->context, (void*)head2, sizeof(head2));
+ }
+
+ // Encode 8x8 macroblocks
+ {
+ static const unsigned short fillBits[] = {0x7F, 7};
+ int DCY=0, DCU=0, DCV=0;
+ int bitBuf=0, bitCnt=0;
+ // comp == 2 is grey+alpha (alpha is ignored)
+ int ofsG = comp > 2 ? 1 : 0, ofsB = comp > 2 ? 2 : 0;
+ const unsigned char *dataR = (const unsigned char *)data;
+ const unsigned char *dataG = dataR + ofsG;
+ const unsigned char *dataB = dataR + ofsB;
+ int x, y, pos;
+ if(subsample) {
+ for(y = 0; y < height; y += 16) {
+ for(x = 0; x < width; x += 16) {
+ float Y[256], U[256], V[256];
+ for(row = y, pos = 0; row < y+16; ++row) {
+ // row >= height => use last input row
+ int clamped_row = (row < height) ? row : height - 1;
+ int base_p = (stbi__flip_vertically_on_write ? (height-1-clamped_row) : clamped_row)*width*comp;
+ for(col = x; col < x+16; ++col, ++pos) {
+ // if col >= width => use pixel from last input column
+ int p = base_p + ((col < width) ? col : (width-1))*comp;
+ float r = dataR[p], g = dataG[p], b = dataB[p];
+ Y[pos]= +0.29900f*r + 0.58700f*g + 0.11400f*b - 128;
+ U[pos]= -0.16874f*r - 0.33126f*g + 0.50000f*b;
+ V[pos]= +0.50000f*r - 0.41869f*g - 0.08131f*b;
+ }
+ }
+ DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+0, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT);
+ DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+8, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT);
+ DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+128, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT);
+ DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+136, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT);
+
+ // subsample U,V
+ {
+ float subU[64], subV[64];
+ int yy, xx;
+ for(yy = 0, pos = 0; yy < 8; ++yy) {
+ for(xx = 0; xx < 8; ++xx, ++pos) {
+ int j = yy*32+xx*2;
+ subU[pos] = (U[j+0] + U[j+1] + U[j+16] + U[j+17]) * 0.25f;
+ subV[pos] = (V[j+0] + V[j+1] + V[j+16] + V[j+17]) * 0.25f;
+ }
+ }
+ DCU = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, subU, 8, fdtbl_UV, DCU, UVDC_HT, UVAC_HT);
+ DCV = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, subV, 8, fdtbl_UV, DCV, UVDC_HT, UVAC_HT);
+ }
+ }
+ }
+ } else {
+ for(y = 0; y < height; y += 8) {
+ for(x = 0; x < width; x += 8) {
+ float Y[64], U[64], V[64];
+ for(row = y, pos = 0; row < y+8; ++row) {
+ // row >= height => use last input row
+ int clamped_row = (row < height) ? row : height - 1;
+ int base_p = (stbi__flip_vertically_on_write ? (height-1-clamped_row) : clamped_row)*width*comp;
+ for(col = x; col < x+8; ++col, ++pos) {
+ // if col >= width => use pixel from last input column
+ int p = base_p + ((col < width) ? col : (width-1))*comp;
+ float r = dataR[p], g = dataG[p], b = dataB[p];
+ Y[pos]= +0.29900f*r + 0.58700f*g + 0.11400f*b - 128;
+ U[pos]= -0.16874f*r - 0.33126f*g + 0.50000f*b;
+ V[pos]= +0.50000f*r - 0.41869f*g - 0.08131f*b;
+ }
+ }
+
+ DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y, 8, fdtbl_Y, DCY, YDC_HT, YAC_HT);
+ DCU = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, U, 8, fdtbl_UV, DCU, UVDC_HT, UVAC_HT);
+ DCV = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, V, 8, fdtbl_UV, DCV, UVDC_HT, UVAC_HT);
+ }
+ }
+ }
+
+ // Do the bit alignment of the EOI marker
+ stbiw__jpg_writeBits(s, &bitBuf, &bitCnt, fillBits);
+ }
+
+ // EOI
+ stbiw__putc(s, 0xFF);
+ stbiw__putc(s, 0xD9);
+
+ return 1;
+}
+
+STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality)
+{
+ stbi__write_context s = { 0 };
+ stbi__start_write_callbacks(&s, func, context);
+ return stbi_write_jpg_core(&s, x, y, comp, (void *) data, quality);
+}
+
+
+#ifndef STBI_WRITE_NO_STDIO
+STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality)
+{
+ stbi__write_context s = { 0 };
+ if (stbi__start_write_file(&s,filename)) {
+ int r = stbi_write_jpg_core(&s, x, y, comp, data, quality);
+ stbi__end_write_file(&s);
+ return r;
+ } else
+ return 0;
+}
+#endif
+
+#endif // STB_IMAGE_WRITE_IMPLEMENTATION
+
+/* Revision history
+ 1.16 (2021-07-11)
+ make Deflate code emit uncompressed blocks when it would otherwise expand
+ support writing BMPs with alpha channel
+ 1.15 (2020-07-13) unknown
+ 1.14 (2020-02-02) updated JPEG writer to downsample chroma channels
+ 1.13
+ 1.12
+ 1.11 (2019-08-11)
+
+ 1.10 (2019-02-07)
+ support utf8 filenames in Windows; fix warnings and platform ifdefs
+ 1.09 (2018-02-11)
+ fix typo in zlib quality API, improve STB_I_W_STATIC in C++
+ 1.08 (2018-01-29)
+ add stbi__flip_vertically_on_write, external zlib, zlib quality, choose PNG filter
+ 1.07 (2017-07-24)
+ doc fix
+ 1.06 (2017-07-23)
+ writing JPEG (using Jon Olick's code)
+ 1.05 ???
+ 1.04 (2017-03-03)
+ monochrome BMP expansion
+ 1.03 ???
+ 1.02 (2016-04-02)
+ avoid allocating large structures on the stack
+ 1.01 (2016-01-16)
+ STBIW_REALLOC_SIZED: support allocators with no realloc support
+ avoid race-condition in crc initialization
+ minor compile issues
+ 1.00 (2015-09-14)
+ installable file IO function
+ 0.99 (2015-09-13)
+ warning fixes; TGA rle support
+ 0.98 (2015-04-08)
+ added STBIW_MALLOC, STBIW_ASSERT etc
+ 0.97 (2015-01-18)
+ fixed HDR asserts, rewrote HDR rle logic
+ 0.96 (2015-01-17)
+ add HDR output
+ fix monochrome BMP
+ 0.95 (2014-08-17)
+ add monochrome TGA output
+ 0.94 (2014-05-31)
+ rename private functions to avoid conflicts with stb_image.h
+ 0.93 (2014-05-27)
+ warning fixes
+ 0.92 (2010-08-01)
+ casts to unsigned char to fix warnings
+ 0.91 (2010-07-17)
+ first public release
+ 0.90 first internal release
+*/
+
+/*
+------------------------------------------------------------------------------
+This software is available under 2 licenses -- choose whichever you prefer.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2017 Sean Barrett
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+software, either in source code form or as a compiled binary, for any purpose,
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this
+software dedicate any and all copyright interest in the software to the public
+domain. We make this dedication for the benefit of the public at large and to
+the detriment of our heirs and successors. We intend this dedication to be an
+overt act of relinquishment in perpetuity of all present and future rights to
+this software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------
+*/