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sixel: fix image deletion issue (#150)

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This fixes the current implementation, which does not delete an image if
an application first erases the image and then spawns a new transparent
image in its place. The reason it didn't work before was because the two
operations were handled at different stages in the rendering pipeline.
This commit is contained in:
veltza 2024-09-20 10:21:30 +03:00 committed by GitHub
parent 5d2d1d818c
commit aaaa59eb77
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1 changed files with 28 additions and 10 deletions
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38
st.c
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@ -2603,8 +2603,8 @@ strhandle(void)
{ defaultcs, "cursor" }
};
#if SIXEL_PATCH
ImageList *im, *newimages, *next, *tail;
int i, x1, y1, x2, y2, numimages;
ImageList *im, *newimages, *next, *tail = NULL;
int i, x1, y1, x2, y2, y, numimages;
int cx, cy;
Line line;
#if SCROLLBACK_PATCH || REFLOW_PATCH
@ -2729,15 +2729,33 @@ strhandle(void)
y1 = newimages->y;
x2 = x1 + newimages->cols;
y2 = y1 + numimages;
if (newimages->transparent) {
for (tail = term.images; tail && tail->next; tail = tail->next);
} else {
for (tail = NULL, im = term.images; im; im = next) {
/* Delete the old images that are covered by the new image(s). We also need
* to check if they have already been deleted before adding the new ones. */
if (term.images) {
char transparent[numimages];
for (i = 0, im = newimages; im; im = im->next, i++) {
transparent[i] = im->transparent;
}
for (im = term.images; im; im = next) {
next = im->next;
if (im->x >= x1 && im->x + im->cols <= x2 &&
im->y >= y1 && im->y <= y2) {
delete_image(im);
continue;
if (im->y >= y1 && im->y < y2) {
y = im->y - scr;
if (y >= 0 && y < term.row && term.dirty[y]) {
line = term.line[y];
j = MIN(im->x + im->cols, term.col);
for (i = im->x; i < j; i++) {
if (line[i].mode & ATTR_SIXEL)
break;
}
if (i == j) {
delete_image(im);
continue;
}
}
if (im->x >= x1 && im->x + im->cols <= x2 && !transparent[im->y - y1]) {
delete_image(im);
continue;
}
}
tail = im;
}