SDL Wiki
(This is the legacy documentation for stable SDL2, the current stable version; SDL3 is the current development version.)


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);

Function Parameters

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.


[ edit | delete | history | feedback | raw ]

[ front page | index | search | recent changes | git repo | offline html ]

All wiki content is licensed under Creative Commons Attribution 4.0 International (CC BY 4.0).
Wiki powered by ghwikipp.