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

% notcurses_channels(3) % nick black nickblack@linux.com % v1.6.19

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)

unsigned channel_r(unsigned channel);

unsigned channel_g(unsigned channel);

unsigned channel_b(unsigned channel);

unsigned channel_rgb(unsigned channel, unsigned restrict r, unsigned restrict g, unsigned* restrict b);**

int channel_set_rgb(unsigned channel, int r, int g, int b);*

int channel_set(unsigned channel, unsigned rgb);*

unsigned channel_alpha(unsigned channel);

int channel_set_alpha(unsigned channel, int alpha);*

bool channel_default_p(unsigned channel);

unsigned channel_set_default(unsigned channel);*

unsigned channels_bchannel(uint64_t channels);

unsigned channels_fchannel(uint64_t channels);

uint64_t channels_set_bchannel(uint64_t channels, uint32_t channel);*

uint64_t channels_set_fchannel(uint64_t channels, uint32_t channel);*

unsigned channels_fg(uint64_t channels);

unsigned channels_bg(uint64_t channels);

unsigned channels_fg_alpha(uint64_t channels);

unsigned channels_bg_alpha(uint64_t channels);

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

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

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

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

int channels_set_fg(uint64_t channels, unsigned rgb);*

int channels_set_bg(uint64_t channels, unsigned rgb);*

int channels_set_fg_alpha(uint64_t channels, int alpha);*

int channels_set_bg_alpha(uint64_t channels, int alpha);*

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);*

unsigned channels_blend(unsigned c1, unsigned c2, unsigned blends);

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)