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add clipped set functions

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nick black 2020-01-12 03:35:58 -05:00 committed by Nick Black
parent c4ee0acff0
commit 0f60af347d
3 changed files with 70 additions and 1 deletions
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4
README.md
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@ -1126,6 +1126,10 @@ ncplane_bg_rgb(const struct ncplane* n, unsigned* r, unsigned* g, unsigned*
int ncplane_set_fg_rgb(struct ncplane* n, int r, int g, int b);
int ncplane_set_bg_rgb(struct ncplane* n, int r, int g, int b);
// Same, but clipped to [0..255].
void ncplane_set_bg_rgb_clipped(struct ncplane* n, int r, int g, int b);
void ncplane_set_fg_rgb_clipped(struct ncplane* n, int r, int g, int b);
// Same, but with rgb assembled into a channel (i.e. lower 24 bits).
int ncplane_set_fg(struct ncplane* n, unsigned channel);
int ncplane_set_bg(struct ncplane* n, unsigned channel);

49
include/notcurses.h
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@ -862,6 +862,35 @@ channel_set_rgb(unsigned* channel, int r, int g, int b){
return 0;
}
// Set the three 8-bit components of a 32-bit channel, and mark it as not using
// the default color. Retain the other bits unchanged. r, g, and b will be
// clipped to the range [0..255].
static inline void
channel_set_rgb_clipped(unsigned* channel, int r, int g, int b){
if(r >= 256){
r = 255;
}
if(g >= 256){
g = 255;
}
if(b >= 256){
b = 255;
}
if(r <= -1){
r = 0;
}
if(g <= -1){
g = 0;
}
if(b <= -1){
b = 0;
}
unsigned c = (r << 16u) | (g << 8u) | b;
c |= CELL_BGDEFAULT_MASK;
const uint64_t mask = CELL_BGDEFAULT_MASK | CELL_BG_MASK;
*channel = (*channel & ~mask) | c;
}
// Same, but provide an assembled, packed 24 bits of rgb.
static inline int
channel_set(unsigned* channel, unsigned rgb){
@ -972,6 +1001,14 @@ channels_set_fg_rgb(uint64_t* channels, int r, int g, int b){
return 0;
}
// Same, but clips to [0..255].
static inline void
channels_set_fg_rgb_clipped(uint64_t* channels, int r, int g, int b){
unsigned channel = channels_fchannel(*channels);
channel_set_rgb_clipped(&channel, r, g, b);
*channels = ((uint64_t)channel << 32llu) | (*channels & 0xffffffffllu);
}
// Set the r, g, and b channels for the background component of this 64-bit
// 'channels' variable, and mark it as not using the default color.
static inline int
@ -984,6 +1021,14 @@ channels_set_bg_rgb(uint64_t* channels, int r, int g, int b){
return 0;
}
// Same, but clips to [0..255].
static inline void
channels_set_bg_rgb_clipped(uint64_t* channels, int r, int g, int b){
unsigned channel = channels_bchannel(*channels);
channel_set_rgb_clipped(&channel, r, g, b);
*channels = (*channels & 0xffffffff00000000llu) | channel;
}
// Same, but set an assembled 32 bit channel at once.
static inline int
channels_set_fg(uint64_t* channels, unsigned rgb){
@ -1251,6 +1296,10 @@ ncplane_bg_rgb(const struct ncplane* n, unsigned* r, unsigned* g, unsigned* b){
API int ncplane_set_fg_rgb(struct ncplane* n, int r, int g, int b);
API int ncplane_set_bg_rgb(struct ncplane* n, int r, int g, int b);
// Same, but clipped to [0..255].
API void ncplane_set_bg_rgb_clipped(struct ncplane* n, int r, int g, int b);
API void ncplane_set_fg_rgb_clipped(struct ncplane* n, int r, int g, int b);
// Same, but with rgb assembled into a channel (i.e. lower 24 bits).
API int ncplane_set_fg(struct ncplane* n, unsigned channel);
API int ncplane_set_bg(struct ncplane* n, unsigned channel);

18
src/lib/notcurses.c
View File

@ -902,17 +902,33 @@ uint32_t ncplane_attr(const ncplane* n){
}
void ncplane_set_fg_default(struct ncplane* n){
ncplane_lock(n);
channels_set_fg_default(&n->channels);
ncplane_unlock(n);
}
void ncplane_set_bg_default(struct ncplane* n){
ncplane_lock(n);
channels_set_bg_default(&n->channels);
ncplane_unlock(n);
}
void ncplane_set_bg_rgb_clipped(ncplane* n, int r, int g, int b){
ncplane_lock(n);
channels_set_bg_rgb_clipped(&n->channels, r, g, b);
ncplane_unlock(n);
}
int ncplane_set_bg_rgb(ncplane* n, int r, int g, int b){
return channels_set_bg_rgb(&n->channels, r, g, b);
}
void ncplane_set_fg_rgb_clipped(ncplane* n, int r, int g, int b){
ncplane_lock(n);
channels_set_fg_rgb_clipped(&n->channels, r, g, b);
ncplane_unlock(n);
}
int ncplane_set_fg_rgb(ncplane* n, int r, int g, int b){
return channels_set_fg_rgb(&n->channels, r, g, b);
}
@ -1058,7 +1074,7 @@ void ncplane_cursor_yx(ncplane* n, int* y, int* x){
static inline bool
ncplane_cursor_stuck(const ncplane* n){
return (n->x == n->lenx && n->y == n->leny);
return (n->x >= n->lenx && n->y >= n->leny);
}
static inline void