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Add a limit on image count and size.

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This commit is contained in:
Nicholas Marriott
2026-10-16 14:09:28 +01:00
parent b7e81de85e
commit ca24dc178b
4 changed files with 233 additions and 4 deletions
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38
image-grid.c
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@@ -59,8 +59,13 @@ TAILQ_HEAD(image_placements, image_placement);
/* Placements owned by one grid. */
struct image_store {
struct image_placements placements;
struct image_placements placements;
TAILQ_ENTRY(image_store) entry;
};
TAILQ_HEAD(image_stores, image_store);
/* All current placements. */
static struct image_stores image_stores = TAILQ_HEAD_INITIALIZER(image_stores);
/* A shared placements copied when duplicating lines. */
struct image_copy_map {
@@ -175,6 +180,7 @@ image_draw_span(struct image_backend *backend, struct tty *tty,
struct image_rect rect;
rect.image = span->placement->image;
image_touch(rect.image);
rect.src_x = span->source_x + start - span->x;
rect.src_y = span->source_y;
rect.sx = end - start;
@@ -265,6 +271,7 @@ image_store_get(struct grid *gd)
if (gd->images == NULL) {
gd->images = xcalloc(1, sizeof *gd->images);
TAILQ_INIT(&gd->images->placements);
TAILQ_INSERT_TAIL(&image_stores, gd->images, entry);
}
return (gd->images);
}
@@ -293,6 +300,7 @@ image_placement_create(struct grid *gd, struct image *im)
TAILQ_INIT(&plmt->spans);
TAILQ_INSERT_TAIL(&store->placements, plmt, entry);
image_ref(im);
image_touch(im);
return (plmt);
}
@@ -440,6 +448,32 @@ image_grid_remove(struct grid *gd, u_int x, u_int y, u_int sx, u_int sy)
image_store_prune(gd->images);
}
/* Remove a placement and all of its spans. */
static void
image_remove_placement(struct image_placement *plmt)
{
struct image_span *span, *span1;
TAILQ_FOREACH_SAFE(span, &plmt->spans, placement_entry, span1)
image_span_free(span);
image_placement_free(plmt);
}
/* Remove every placement for an image. */
void
image_grid_remove_all(struct image *im)
{
struct image_store *store;
struct image_placement *plmt, *next;
TAILQ_FOREACH(store, &image_stores, entry) {
TAILQ_FOREACH_SAFE(plmt, &store->placements, entry, next) {
if (plmt->image == im)
image_remove_placement(plmt);
}
}
}
/* Free all spans on a grid line. */
void
image_grid_free_line(struct grid *gd, struct grid_line *gl)
@@ -464,6 +498,7 @@ image_grid_free(struct grid *gd)
{
if (gd->images != NULL) {
image_store_prune(gd->images);
TAILQ_REMOVE(&image_stores, gd->images, entry);
free(gd->images);
gd->images = NULL;
}
@@ -973,6 +1008,7 @@ image_grid_get_at(struct grid *gd, u_int x, u_int y, struct image **im,
if (found == NULL)
return (-1);
*im = found->placement->image;
image_touch(*im);
*src_x = found->source_x + x - found->x;
*src_y = found->source_y;
return (1);