ggiSetPalette(3) Manipulate the palette of a visual

Other Alias



#include <ggi/ggi.h>
int ggiSetPalette(ggi_visual_t vis, int s, int len, const ggi_color *cmap);
int ggiGetPalette(ggi_visual_t vis, int s, int len, ggi_color *cmap);


LibGGI visuals in GT_PALETTE mode map all pixelvalues to the corresponding ggi_color(3) entry in the visual's palette.

ggiSetPalette sets a range of palette values of length len, starting at index number s. The index can be GGI_PALETTE_DONTCARE to indicate that the palette can be installed anywhere in the CLUT. This allows optimized use in windowing environments (to minimize color flashing between windows) and should be used if possible.

ggiGetPalette copies the specified colors (starting from s, for len colors) from the visual's palette to the array pointed by cmap.


ggiSetPalette returns the number of the first entry changed. <0 indicate a ggi-error(3).

ggiGetPalette returns 0 for OK, otherwise a ggi-error(3) code. When called with len=0 this function will not automatically succeed, but the return code will indicate whether there is a readable CLUT.


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