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Handle the RGB colour escape sequence (\033[38;2;<r>;<g>;<b>m and 48;2)

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like xterm(1) does, by mapping to the nearest in the 256 colour palette.
This commit is contained in:
nicm
2015-06-05 22:33:39 +00:00
parent 1cb073d48e
commit 55b96a5bd5
3 changed files with 85 additions and 41 deletions
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91
input.c
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@ -126,6 +126,8 @@ void input_csi_dispatch_rm_private(struct input_ctx *);
void input_csi_dispatch_sm(struct input_ctx *);
void input_csi_dispatch_sm_private(struct input_ctx *);
void input_csi_dispatch_winops(struct input_ctx *);
void input_csi_dispatch_sgr_256(struct input_ctx *, int, u_int *);
void input_csi_dispatch_sgr_rgb(struct input_ctx *, int, u_int *);
void input_csi_dispatch_sgr(struct input_ctx *);
int input_dcs_dispatch(struct input_ctx *);
int input_utf8_open(struct input_ctx *);
@ -1609,13 +1611,71 @@ input_csi_dispatch_winops(struct input_ctx *ictx)
}
}
/* Handle CSI SGR for 256 colours. */
void
input_csi_dispatch_sgr_256(struct input_ctx *ictx, int fgbg, u_int *i)
{
struct grid_cell *gc = &ictx->cell.cell;
int c;
(*i)++;
c = input_get(ictx, *i, 0, -1);
if (c == -1) {
if (fgbg == 38) {
gc->flags &= ~GRID_FLAG_FG256;
gc->fg = 8;
} else if (fgbg == 48) {
gc->flags &= ~GRID_FLAG_BG256;
gc->bg = 8;
}
} else {
if (fgbg == 38) {
gc->flags |= GRID_FLAG_FG256;
gc->fg = c;
} else if (fgbg == 48) {
gc->flags |= GRID_FLAG_BG256;
gc->bg = c;
}
}
}
/* Handle CSI SGR for RGB colours. */
void
input_csi_dispatch_sgr_rgb(struct input_ctx *ictx, int fgbg, u_int *i)
{
struct grid_cell *gc = &ictx->cell.cell;
int c, r, g, b;
(*i)++;
r = input_get(ictx, *i, 0, -1);
if (r == -1 || r > 255)
return;
(*i)++;
g = input_get(ictx, *i, 0, -1);
if (g == -1 || g > 255)
return;
(*i)++;
b = input_get(ictx, *i, 0, -1);
if (b == -1 || b > 255)
return;
c = colour_find_rgb(r, g, b);
if (fgbg == 38) {
gc->flags |= GRID_FLAG_FG256;
gc->fg = c;
} else if (fgbg == 48) {
gc->flags |= GRID_FLAG_BG256;
gc->bg = c;
}
}
/* Handle CSI SGR. */
void
input_csi_dispatch_sgr(struct input_ctx *ictx)
{
struct grid_cell *gc = &ictx->cell.cell;
u_int i;
int n, m;
int n;
if (ictx->param_list_len == 0) {
memcpy(gc, &grid_default_cell, sizeof *gc);
@ -1627,28 +1687,13 @@ input_csi_dispatch_sgr(struct input_ctx *ictx)
if (n == 38 || n == 48) {
i++;
if (input_get(ictx, i, 0, -1) != 5)
continue;
i++;
m = input_get(ictx, i, 0, -1);
if (m == -1) {
if (n == 38) {
gc->flags &= ~GRID_FLAG_FG256;
gc->fg = 8;
} else if (n == 48) {
gc->flags &= ~GRID_FLAG_BG256;
gc->bg = 8;
}
} else {
if (n == 38) {
gc->flags |= GRID_FLAG_FG256;
gc->fg = m;
} else if (n == 48) {
gc->flags |= GRID_FLAG_BG256;
gc->bg = m;
}
switch (input_get(ictx, i, 0, -1)) {
case 2:
input_csi_dispatch_sgr_rgb(ictx, n, &i);
break;
case 5:
input_csi_dispatch_sgr_256(ictx, n, &i);
break;
}
continue;
}