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rect: There's no coverage witout overlap

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The rectangles need to touch/overlap in both directions, otherwise
there's no coverage that covers both rectangles.

Test included.

Fixes rendering glitches in various apps when redrawing.

Fixes: #6849
This commit is contained in:
Benjamin Otte
2024-07-10 00:26:57 +02:00
parent ae08963acc
commit 9a6e61e510
2 changed files with 8 additions and 5 deletions
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7
gsk/gskrectprivate.h
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@@ -131,9 +131,10 @@ gsk_rect_coverage (const graphene_rect_t *r1,
x2max = MAX (r1->origin.x + r1->size.width, r2->origin.x + r2->size.width);
y2max = MAX (r1->origin.y + r1->size.height, r2->origin.y + r2->size.height);
if (x2min >= x1max)
if (x2min >= x1max && y2min >= y1max)
{
float w, h;
w = x2min - x1max;
h = y2max - y1min;
size2 = w * h;
@@ -142,11 +143,7 @@ gsk_rect_coverage (const graphene_rect_t *r1,
r = GRAPHENE_RECT_INIT (x1max, y1min, w, h);
size = size2;
}
}
if (y2min >= y1max)
{
float w, h;
w = x2max - x1min;
h = y2min - y1max;
size2 = w * h;