mirrors/tmux
1
0
Fork 0
mirror of https://github.com/tmux/tmux.git synced 2026-09-05 21:20:45 +00:00
Code Issues Packages Projects Releases Wiki Activity

sixel: scale source raster bounds

Browse Source
This commit is contained in:
Michael Grant
2026-08-10 12:14:02 +01:00
parent beea19dc97
commit f2ca8ade2a
1 changed files with 14 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
image-sixel.c
View File

@@ -575,6 +575,7 @@ sixel_scale(struct sixel_image *si, u_int xpixel, u_int ypixel, u_int ox,
u_int oy, u_int sx, u_int sy, int colours)
{
struct sixel_image *new;
uint64_t x0, x1, y0, y1;
u_int cx, cy, pox, poy, psx, psy, tsx, tsy, px, py;
u_int x, y, i;
@@ -598,10 +599,19 @@ sixel_scale(struct sixel_image *si, u_int xpixel, u_int ypixel, u_int ox,
if (ypixel == 0)
ypixel = si->ypixel;
pox = ox * si->xpixel;
poy = oy * si->ypixel;
psx = sx * si->xpixel;
psy = sy * si->ypixel;
/*
* Map cell boundaries over the actual raster, not the rounded-up cell
* canvas. Otherwise a raster shorter than its last cell row produces an
* empty strip when it is scaled for output.
*/
x0 = (uint64_t)ox * si->x / cx;
x1 = (uint64_t)(ox + sx) * si->x / cx;
y0 = (uint64_t)oy * si->y / cy;
y1 = (uint64_t)(oy + sy) * si->y / cy;
pox = x0;
poy = y0;
psx = x1 - x0;
psy = y1 - y0;
tsx = sx * xpixel;
tsy = sy * ypixel;