Get RGBA values from a pixel in the specified format.
void SDL_GetRGBA(Uint32 pixel, const SDL_PixelFormat * format, Uint8 * r, Uint8 * g, Uint8 * b, Uint8 * a);
|pixel||a pixel value|
|format||an SDL_PixelFormat structure describing the format of the pixel|
|r||a pointer filled in with the red component|
|g||a pointer filled in with the green component|
|b||a pointer filled in with the blue component|
|a||a pointer filled in with the alpha component|
This function uses the entire 8-bit [0..255] range when converting color components from pixel formats with less than 8-bits per RGB component (e.g., a completely white pixel in 16-bit RGB565 format would return [0xff, 0xff, 0xff] not [0xf8, 0xfc, 0xf8]).
If the surface has no alpha component, the alpha will be returned as 0xff (100% opaque).
This function is available since SDL 2.0.0.