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Use this function to map an RGB triple to an opaque pixel value for a given pixel format.


Uint32 SDL_MapRGB(const SDL_PixelFormat* format,
                  Uint8                  r, 
                  Uint8                  g, 
                  Uint8                  b)

Function Parameters


an SDL_PixelFormat structure describing the format of the pixel


the red component of the pixel in the range 0-255


the green component of the pixel in the range 0-255


the blue component of the pixel in the range 0-255

Return Value

A pixel value.

Maps the RGB color value to the specified pixel format and returns the pixel value as a 32-bit int best approximating the given RGB color value for the given pixel format.

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).


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).

Code Examples

You can add your code example here


You can add useful comments here

CategoryAPI, CategoryPixels

None: SDL_MapRGB (last edited 2010-09-26 17:12:51 by SheenaSmith)

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