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Images and copy mode.

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This commit is contained in:
Nicholas Marriott
2026-10-14 00:23:36 +01:00
parent c53fd94ffd
commit e501ea12c7
3 changed files with 129 additions and 0 deletions
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47
image-grid.c
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@@ -374,6 +374,53 @@ image_grid_duplicate_lines(struct grid *dst, u_int dy, struct grid *src,
free(maps);
}
/* Copy clipped image spans between grid areas. */
void
image_grid_copy_area(struct grid *dst, u_int dx, u_int dy, struct grid *src,
u_int px, u_int py, u_int sx, u_int sy)
{
struct image_copy_map *maps = NULL;
struct image_placement *plmt;
struct image_line *src_line, *dst_line;
struct image_span *span;
u_int nmaps = 0, row, start, end, span_end;
if (dst == src || sx == 0 || sy == 0)
return;
if (dy >= dst->hsize + dst->sy || py >= src->hsize + src->sy)
return;
if (sy > dst->hsize + dst->sy - dy)
sy = dst->hsize + dst->sy - dy;
if (sy > src->hsize + src->sy - py)
sy = src->hsize + src->sy - py;
end = px + sx;
if (end < px)
end = UINT_MAX;
for (row = 0; row < sy; row++) {
src_line = src->linedata[py + row].images;
if (src_line == NULL)
continue;
dst_line = NULL;
TAILQ_FOREACH(span, &src_line->spans, line_entry) {
span_end = span->x + span->sx;
start = (span->x > px ? span->x : px);
if (start >= end || span_end <= px)
continue;
if (span_end > end)
span_end = end;
if (dst_line == NULL)
dst_line = image_line_get(&dst->linedata[dy + row]);
plmt = image_copy_placement(dst, span->placement, &maps,
&nmaps);
image_span_add(dst_line, plmt, dx + start - px,
span_end - start, span->source_x + start - span->x,
span->source_y);
}
}
free(maps);
}
/* Check whether a grid line has any image spans. */
int
image_grid_line_has_images(struct grid_line *gl)