say i have this definition:
1 typedef struct SDL_Surface {
2 Uint32 flags; /* Read-only */
3 SDL_PixelFormat *format; /* Read-only */
4 int w, h; /* Read-only */
5 Uint16 pitch; /* Read-only */
6 void *pixels; /* Read-write */
7 SDL_Rect clip_rect; /* Read-only */
8 int refcount; /* Read-mostly */
9
10 /* This structure also contains private fields not shown here
*/
11 } SDL_Surface;
notice two pointers, format and pixels.
say format has this definition.
1 typedef struct {
2 SDL_Palette *palette;
3 Uint8 BitsPerPixel;
4 Uint8 BytesPerPixel;
5 Uint8 Rloss, Gloss, Bloss, Aloss;
6 Uint8 Rshift, Gshift, Bshift, Ashift;
7 Uint32 Rmask, Gmask, Bmask, Amask;
8 Uint32 colorkey;
9 Uint8 alpha;
10 } SDL_PixelFormat;
so say i want to create a mock sdl handle and pass it to some library
function that requires an sdl handle. (would it even work? would i
need to use an SDL_SWSURFACE?)
so i make the pixelformat data using struct.pack, and make the surface
data using struct.pack, but how do i link the surface data to the
pixelformat data? if i just use id() it'll give me the memory address
of the "box" for the string and not the string data itself. thanks.
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