notcurses/doc/man/man3/notcurses_channels.3.md

% notcurses_channels(3) % nick black nickblack@linux.com % v2.2.4

NAME

notcurses_channels - operations on notcurses channels

SYNOPSIS

#include <notcurses/notcurses.h>

#define CHANNELS_RGB_INITIALIZER(fr, fg, fb, br, bg, bb) \
  (((((uint64_t)(fr) << 16u) + ((uint64_t)(fg) << 8u) + (uint64_t)(fb)) << 32ull) + \
   (((br) << 16u) + ((bg) << 8u) + (bb)) + CELL_BGDEFAULT_MASK + CELL_FGDEFAULT_MASK)

#define CHANNEL_RGB_INITIALIZER(r, g, b) \
  (((uint32_t)r << 16u) + ((uint32_t)g << 8u) + (b) + CELL_BGDEFAULT_MASK)

uint32_t channel_r(uint32_t channel);

uint32_t channel_g(uint32_t channel);

uint32_t channel_b(uint32_t channel);

uint32_t channel_rgb8(uint32_t channel, uint32_t restrict r, uint32_t restrict g, uint32_t* restrict b);**

int channel_set_rgb8(uint32_t channel, int r, int g, int b);*

int channel_set(uint32_t channel, uint32_t rgb);*

unsigned channel_palindex(uint32_t channel);

int channel_set_palindex(uint32_t channel, int idx);*

uint32_t channel_alpha(uint32_t channel);

int channel_set_alpha(uint32_t channel, unsigned alpha);*

bool channel_default_p(uint32_t channel);

uint32_t channel_set_default(uint32_t channel);*

unsigned channels_fg_rgb(uint64_t channels);

unsigned channels_bg_rgb(uint64_t channels);

int channels_set_fg_rgb(uint64_t channels, unsigned rgb);*

int channels_set_bg_rgb(uint64_t channels, unsigned rgb);*

unsigned channels_fg_alpha(uint64_t channels);

unsigned channels_bg_alpha(uint64_t channels);

int channels_set_fg_alpha(uint64_t channels, int alpha);*

int channels_set_bg_alpha(uint64_t channels, int alpha);*

unsigned channels_fg_palindex(uint64_t channels);

unsigned channels_bg_palindex(uint64_t channels);

int channels_set_fg_palindex(uint64_t channels, int idx);*

int channels_set_bg_palindex(uint64_t channels, int idx);*

unsigned channels_fg_rgb8(uint64_t channels, unsigned r, unsigned g, unsigned* b);**

unsigned channels_bg_rgb8(uint64_t channels, unsigned r, unsigned g, unsigned* b);**

int channels_set_fg_rgb8(uint64_t channels, int r, int g, int b);*

int channels_set_bg_rgb8(uint64_t channels, int r, int g, int b);*

bool channels_fg_default_p(uint64_t channels);

bool channels_bg_default_p(uint64_t channels);

uint64_t channels_set_fg_default(uint64_t channels);*

uint64_t channels_set_bg_default(uint64_t channels);*

DESCRIPTION

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_plane(3), notcurses_output(3)