Zedhugh Chen
2fc4b33359
- 重构模块使用新的代码风格 - 老代码 (src 目录下的代码) 继续使用之前的代码风格 通过在需要不同代码风格的目录下放对应 .clang-format 配置文件实现
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
#pragma once
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#include <stddef.h>
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#include <stdint.h>
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typedef struct rect_t {
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int32_t x1;
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int32_t y1;
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int32_t x2;
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int32_t y2;
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} rect_t;
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bool rect_intersection(rect_t a, rect_t b, rect_t *intersection);
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size_t rect_subtract(rect_t source, rect_t clip, rect_t remaining[4]);
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/**
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* @brief 从 source 中按顺序减去 clips 中的多个矩形
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* @param source 源矩形
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* @param clips 要减去的矩形数组，可为 nullptr
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* @param clip_count clips 的长度
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* @param remaining 输出剩余矩形数组；若不为
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* nullptr，则由函数分配内存并由调用方释放
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* @return 剩余矩形数量
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*
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* @code{.c}
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* rect_t source = {.x1 = 0, .y1 = 0, .x2 = 100, .y2 = 80};
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* rect_t clips[] = {
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* {.x1 = 10, .y1 = 10, .x2 = 40, .y2 = 40},
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* {.x1 = 30, .y1 = 20, .x2 = 70, .y2 = 60},
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* };
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*
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* rect_t *remaining = nullptr;
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* size_t count = rect_subtract_many(source, clips, 2, &remaining);
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*
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* for (size_t i = 0; i < count; i++) {
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* // use remaining[i]
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* }
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*
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* free(remaining);
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* @endcode
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*/
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size_t rect_subtract_many(rect_t source, const rect_t clips[],
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size_t clip_count, rect_t **remaining);
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