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Bug 951268 - Use MaskSurface when drawing A8 filter results. r=Bas

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This commit is contained in:
Markus Stange 2014-01-17 11:06:11 +01:00
parent 202cc29467
commit 13cd1908f5
1 changed files with 13 additions and 3 deletions
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16
gfx/2d/FilterNodeSoftware.cpp
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@ -591,9 +591,19 @@ FilterNodeSoftware::Draw(DrawTarget* aDrawTarget,
Point sourceToDestOffset = aDestPoint - aSourceRect.TopLeft();
Rect renderedSourceRect = Rect(outputRect).Intersect(aSourceRect);
Rect renderedDestRect = renderedSourceRect + sourceToDestOffset;
aDrawTarget->DrawSurface(result, renderedDestRect,
renderedSourceRect - Point(outputRect.TopLeft()),
DrawSurfaceOptions(), aOptions);
if (result->GetFormat() == SurfaceFormat::A8) {
// Interpret the result as having implicitly black color channels.
aDrawTarget->PushClipRect(renderedDestRect);
aDrawTarget->MaskSurface(ColorPattern(Color(0.0, 0.0, 0.0, 1.0)),
result,
Point(outputRect.TopLeft()) + sourceToDestOffset,
aOptions);
aDrawTarget->PopClip();
} else {
aDrawTarget->DrawSurface(result, renderedDestRect,
renderedSourceRect - Point(outputRect.TopLeft()),
DrawSurfaceOptions(), aOptions);
}
}
TemporaryRef<DataSourceSurface>