fix: Update ege_roundrect to include PIMAGE parameter

[FeJS8888]

Summary by CodeRabbit

新增功能

• 圆角矩形绘制功能现已支持为四个角独立指定不同的圆角半径值，提供更灵活的图形设计选项。

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[coderabbitai]

概述

在 src/egegapi.cpp 中，添加了一个新的 9 参数重载版本的 ege_roundrect 函数，支持分别指定四个角的圆角半径（radius1、radius2、radius3、radius4）。现有的 5 参数版本已更新为委托给新的 9 参数重载。

变更

集合 / 文件	变更摘要
新增函数重载 src/egegapi.cpp	添加 ege_roundrect 的 9 参数重载，支持独立的四个角半径参数；5 参数版本现委托给新重载实现参数转发

代码审查工作量

🎯 2 (Simple) | ⏱️ ~8 分钟

诗

🐰 四个圆角齐欢唱，

兔兔绘制新模样，

参数转发如轻盈，

函数重载展风采！✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	PR标题准确反映了主要变更：向ege_roundrect函数添加PIMAGE参数，这与摘要中描述的核心改动一致。

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[augmentcode]

🤖 Augment PR Summary

Summary: Fixes ege_roundrect so drawing targets the provided PIMAGE instead of ignoring it.

Change: The single-radius overload now forwards pimg to the 4-corner overload, matching ege_fillroundrect behavior.

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[augmentcode]

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In @src/egegapi.cpp:
- Around line 2023-2026: The 9-argument overloads ege_roundrect(...) and
ege_fillroundrect(...) call CONVERT_IMAGE and then use img->getGraphics()
without checking for NULL; replicate the defensive pattern from ege_rectangle by
wrapping the code that calls img->getGraphics() and manipulates img inside an if
(img) { ... } block after CONVERT_IMAGE returns to avoid dereferencing a NULL
img when CONVERT_IMAGE returns NULL. Ensure all uses of img in those functions
are guarded and that the function returns/cleans up appropriately if img is
NULL.

📜 Review details

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 0c2b593 and 7b803a1.

📒 Files selected for processing (1)

• src/egegapi.cpp

🧰 Additional context used

📓 Path-based instructions (1)

**/*.{h,hpp,cpp,cc,cxx}

📄 CodeRabbit inference engine (.github/copilot-instructions.md)

All implementations must be in ege namespace, with public API in global namespace

Files:

• src/egegapi.cpp

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• GitHub Check: macOS Cross-Compile - Debug
• GitHub Check: MSYS2 Latest - Debug
• GitHub Check: MSYS2 Latest - Release
• GitHub Check: MSVC 2022 Build (Release)

[FeJS8888]

@yixy-only 这个应该是之前 ege_fillroundrect 改剩下的

[wysaid]

@FeJS8888 合入了~