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notcurses_palette - operations on notcurses palettes

Authors

       nick black <nickblack@linux.com>.

                                                     v3.0.7                                 notcurses_palette(3)

Description

       Some  terminals  only  support  256 colors, but allow the full palette to be specified with arbitrary RGB
       colors.  In all cases, it's more performant to use indexed colors, since it's much less data to write  to
       the terminal.  If you can limit yourself to 256 colors, that's probably for the best.

       In  addition,  palette-based color allows for very fast color cycling effects, since a single command can
       affect many cells on the screen.

Name

       notcurses_palette - operations on notcurses palettes

Return Values

       Functions returning int return -1 on failure, or 0 on success.  Failure is always due to invalid  inputs.
       Functions  returning  bool  are predicates, and return the requested value.  Functions returning unsigned
       forms return the input, modified as requested.

See Also

notcurses(3), notcurses_cell(3), notcurses_channels(3), notcurses_output(3), notcurses_plane(3)

Synopsis

#include<notcurses/notcurses.h>

              typedef struct ncpalette {
                // We store the RGB values as a regular ol' channel
                uint32_t chans[NCPALETTESIZE];
              } ncpalette;

       boolnotcurses_cantruecolor(conststructnotcurses*nc);ncpalette*ncpalette_new(structnotcurses*nc);intncpalette_use(structnotcurses*nc,constncpalette*p);intncpalette_set_rgb8(ncpalette*p,intidx,intr,intg,intb);intncpalette_set(ncpalette*p,intidx,unsignedrgb);intncpalette_get(constncpalette*p,intidx,uint32_t*palent);intncpalette_get_rgb8(constncpalette*p,intidx,int*restrictr,int*restrictg,int*restrictb);voidncpalette_free(ncpalette*p);boolnotcurses_canchangecolors(conststructnotcurses*nc);

See Also