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common: fix wrong viewport region.

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in the clip rect, viewport must be accumulated to the smaller one.
this patch improves that corner-case.
This commit is contained in:
Hermet Park 2021-03-26 17:24:43 +09:00
parent f1fe36d8f6
commit 4a19e5b9f6
3 changed files with 15 additions and 1 deletions
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1
src/lib/tvgPaint.h
View file

@ -214,6 +214,7 @@ namespace tvg
RenderRegion viewport2; RenderRegion viewport2;
if ((cmpFastTrack = _clipPathFastTrack(cmpTarget, pTransform, viewport2))) { if ((cmpFastTrack = _clipPathFastTrack(cmpTarget, pTransform, viewport2))) {
viewport = renderer.viewport(); viewport = renderer.viewport();
viewport2.merge(viewport);
renderer.viewport(viewport2); renderer.viewport(viewport2);
} }
} }

13
src/lib/tvgRender.h
View file

@ -48,6 +48,19 @@ struct Compositor {
struct RenderRegion { struct RenderRegion {
uint32_t x, y, w, h; uint32_t x, y, w, h;
void merge(const RenderRegion& rhs)
{
auto x1 = x + w;
auto y1 = y + h;
auto x2 = rhs.x + rhs.w;
auto y2 = rhs.y + rhs.h;
x = max(x, rhs.x);
y = max(y, rhs.y);
w = min(x1, x2) - x;
h = min(y1, y2) - y;
}
}; };
struct RenderTransform struct RenderTransform