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Speed up compositing

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* subcompositor.c (IntersectBoxes): New function.
(SubcompositorUpdate): Intersect boxes instead of regions when
updating from global update region.
This commit is contained in:
oldosfan 2022-09-25 07:54:16 +00:00
parent 459de34ca7
commit 86216a1164
1 changed files with 51 additions and 20 deletions
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61
subcompositor.c
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@ -1727,6 +1727,29 @@ StorePreviousDamage (Subcompositor *subcompositor,
update_region);
}
static Bool
IntersectBoxes (pixman_box32_t *in, pixman_box32_t *other,
pixman_box32_t *out)
{
pixman_box32_t a, b;
/* Take copies of all the boxes, since one of them might be out. */
a = *in;
b = *other;
out->x1 = MAX (a.x1, b.x1);
out->y1 = MAX (a.y1, b.y1);
out->x2 = MIN (a.x2, b.x2);
out->y2 = MIN (a.y2, b.y2);
/* If the intersection is empty, return False. */
if (out->x2 - out->x1 <= 0 || out->y2 - out->y1 <= 0)
return False;
return True;
}
void
SubcompositorUpdate (Subcompositor *subcompositor)
{
@ -2156,28 +2179,36 @@ SubcompositorUpdate (Subcompositor *subcompositor)
if (!IsGarbaged (subcompositor) && (age >= 0 && age < 3))
{
/* First, obtain a new region that is the intersection of
the view with the global update region. */
pixman_region32_intersect_rect (&temp, &update_region,
view->abs_x, view->abs_y,
ViewWidth (view),
ViewHeight (view));
/* Next, composite every rectangle in that region. */
boxes = pixman_region32_rectangles (&temp, &nboxes);
/* Next, composite every rectangle in the update region
intersecting with the target. */
boxes = pixman_region32_rectangles (&update_region, &nboxes);
for (i = 0; i < nboxes; ++i)
{
/* Check if the rectangle is completely inside the
region. We used to take the intersection of the
region, but that proved to be too slow. */
temp_boxes.x1 = view->abs_x;
temp_boxes.y1 = view->abs_y;
temp_boxes.x2 = view->abs_x + ViewWidth (view);
temp_boxes.y2 = view->abs_y + ViewHeight (view);
if (IntersectBoxes (&boxes[i], &temp_boxes, &temp_boxes))
RenderComposite (buffer, subcompositor->target, op,
/* src-x. */
BoxStartX (boxes[i]) - view->abs_x,
BoxStartX (temp_boxes) - view->abs_x,
/* src-y. */
BoxStartY (boxes[i]) - view->abs_y,
BoxStartY (temp_boxes) - view->abs_y,
/* dst-x. */
BoxStartX (boxes[i]) - min_x + tx,
BoxStartX (temp_boxes) - min_x + tx,
/* dst-y. */
BoxStartY (boxes[i]) - min_y + ty,
/* width, height. */
BoxWidth (boxes[i]), BoxHeight (boxes[i]));
BoxStartY (temp_boxes) - min_y + ty,
/* width. */
BoxWidth (temp_boxes),
/* height. */
BoxHeight (temp_boxes));
}
}
else
{