SDL_MapRGB — Map a RGB color value to a pixel format.
#include "SDL.h"
Uint32 SDL_MapRGB( |
SDL_PixelFormat * | fmt, |
| Uint8 | r, | |
| Uint8 | g, | |
| Uint8 | b); |
Maps the RGB color value to the specified pixel format and returns the pixel value as a 32-bit int.
If the format has a palette (8-bit) the index of the closest matching color in the palette will be returned.
If the specified pixel format has an alpha component it will be returned as all 1 bits (fully opaque).
A pixel value best approximating the given RGB color value for a given pixel format. If the pixel format bpp (color depth) is less than 32-bpp then the unused upper bits of the return value can safely be ignored (e.g., with a 16-bpp format the return value can be assigned to a Uint16, and similarly a Uint8 for an 8-bpp format).
SDL_GetRGB(3), SDL_GetRGBA(3), SDL_MapRGBA(3), SDL_PixelFormat(3)
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This manual page is taken from the SDL library, licensed under GNU LGPL. |