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| A *32-bit* pixel value. | Returns a *32-bit* pixel value. |
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SDL_MapRGBA
Use this function to map an RGBA quadruple to a pixel value for a given pixel format.
Contents
Syntax
Uint32 SDL_MapRGBA(const SDL_PixelFormat* format,
Uint8 r,
Uint8 g,
Uint8 b,
Uint8 a)
Function Parameters
format |
an SDL_PixelFormat structure describing the format of the pixel |
r |
the red component of the pixel in the range 0-255 |
g |
the green component of the pixel in the range 0-255 |
b |
the blue component of the pixel in the range 0-255 |
a |
the alpha component of the pixel in the range 0-255 |
Return Value
Returns a *32-bit* pixel value.
If the format has a palette (8-bit) the index of the closest matching color in the palette will be returned.
Code Examples
You can add your code example here
Remarks
*
If the specified pixel format has no alpha component the alpha value will be ignored (as it will be in formats with a palette).
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).
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