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typedef struct SDL_BlitMap
{
SDL_Surface *dst;
int identity;
SDL_blit blit; //函数指针变量
void *data;
SDL_BlitInfo info;
/* the version count matches the destination; mismatch indicates
an invalid mapping */
Uint32 dst_palette_version;
Uint32 src_palette_version;
{
SDL_Surface *dst;
int identity;
SDL_blit blit; //函数指针变量
void *data;
SDL_BlitInfo info;
/* the version count matches the destination; mismatch indicates
an invalid mapping */
Uint32 dst_palette_version;
Uint32 src_palette_version;
} SDL_BlitMap;
/**
* \brief The type of function used for surface blitting functions.
*/
typedef int (*SDL_blit) (struct SDL_Surface * src, SDL_Rect * srcrect,
struct SDL_Surface * dst, SDL_Rect * dstrect);
typedef struct
{
Uint8 *src;
int src_w, src_h;
int src_pitch;
int src_skip;
Uint8 *dst;
int dst_w, dst_h;
int dst_pitch;
int dst_skip;
SDL_PixelFormat *src_fmt;
SDL_PixelFormat *dst_fmt;
Uint8 *table;
int flags;
Uint32 colorkey;
Uint8 r, g, b, a;
} SDL_BlitInfo;