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Improvement: --resize-damage

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- Add --resize-damage to enlarge/shrink repaint region by a specific
  number of pixels, used for solving the line corruption issue with
  blur. Thanks to Nuck and jerri in #104 for reporting.

- Fix the memory leak of blur shader string.
This commit is contained in:
Richard Grenville
2013-04-27 11:43:11 +08:00
parent c93d8830ff
commit 8113e4e3b4
4 changed files with 69 additions and 5 deletions
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60
src/compton.h
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@ -850,19 +850,69 @@ get_screen_region(session_t *ps) {
return XFixesCreateRegion(ps->dpy, &r, 1);
}
/**
* Resize a region.
*/
static inline void
resize_region(session_t *ps, XserverRegion region, short mod) {
if (!mod || !region) return;
int nrects = 0, nnewrects = 0;
XRectangle *newrects = NULL;
XRectangle *rects = XFixesFetchRegion(ps->dpy, region, &nrects);
if (!rects || !nrects)
goto resize_region_end;
// Allocate memory for new rectangle list, because I don't know if it's
// safe to write in the memory Xlib allocates
newrects = calloc(nrects, sizeof(XRectangle));
if (!newrects) {
printf_errf("(): Failed to allocate memory.");
exit(1);
}
// Loop through all rectangles
for (int i = 0; i < nrects; ++i) {
int x1 = max_i(rects[i].x - mod, 0);
int y1 = max_i(rects[i].y - mod, 0);
int x2 = min_i(rects[i].x + rects[i].width + mod, ps->root_width);
int y2 = min_i(rects[i].y + rects[i].height + mod, ps->root_height);
int wid = x2 - x1;
int hei = y2 - y1;
if (wid <= 0 || hei <= 0)
continue;
newrects[nnewrects].x = x1;
newrects[nnewrects].y = y1;
newrects[nnewrects].width = wid;
newrects[nnewrects].height = hei;
++nnewrects;
}
// Set region
XFixesSetRegion(ps->dpy, region, newrects, nnewrects);
resize_region_end:
cxfree(rects);
free(newrects);
}
/**
* Dump a region.
*/
static inline void
dump_region(const session_t *ps, XserverRegion region) {
int nrects = 0, i;
XRectangle *rects = XFixesFetchRegion(ps->dpy, region, &nrects);
if (!rects)
return;
int nrects = 0;
XRectangle *rects = NULL;
if (!rects && region)
rects = XFixesFetchRegion(ps->dpy, region, &nrects);
for (i = 0; i < nrects; ++i)
printf_dbgf("(%#010lx): %d rects\n", region, nrects);
if (!rects) return;
for (int i = 0; i < nrects; ++i)
printf("Rect #%d: %8d, %8d, %8d, %8d\n", i, rects[i].x, rects[i].y,
rects[i].width, rects[i].height);
putchar('\n');
fflush(stdout);
cxfree(rects);
}