lib: http://www.pixman.org/
存储库:https://cgit.freedesktop.org/pixman/tree/
无效pixman_region32_init(pixman_region32_t*地区(;
我找不到该函数的实现。
谢谢。。。
它位于 pixman/pixman.h (pixman-0.34.0(
ypedef struct pixman_region32_data pixman_region32_data_t;
typedef struct pixman_box32 pixman_box32_t;
typedef struct pixman_rectangle32 pixman_rectangle32_t;
typedef struct pixman_region32 pixman_region32_t;
struct pixman_region32_data {
long size;
long numRects;
/* pixman_box32_t rects[size]; in memory but not explicitly declared */
};
struct pixman_rectangle32
{
int32_t x, y;
uint32_t width, height;
};
struct pixman_box32
{
int32_t x1, y1, x2, y2;
};
struct pixman_region32
{
pixman_box32_t extents;
pixman_region32_data_t *data;
};
它在pixman-region32.c
中。您看不到它,因为这些函数是由PREFIX
宏生成的,然后使用pixman-region.c
中的代码。看这里:
typedef pixman_box32_t box_type_t;
typedef pixman_region32_data_t region_data_type_t;
typedef pixman_region32_t region_type_t;
typedef int64_t overflow_int_t;
typedef struct {
int x, y;
} point_type_t;
#define PREFIX(x) pixman_region32##x
#define PIXMAN_REGION_MAX INT32_MAX
#define PIXMAN_REGION_MIN INT32_MIN
#include "pixman-region.c"
它首先将PREFIX
宏设置为 pixman_region32
,然后从 pixman-region.c
导入代码。