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Bug 758980: Assume DirectWrite is buggy when it returns empty alpha texture bounds. r=jrmuizel

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This commit is contained in:
Bas Schouten 2012-06-13 10:42:23 +02:00
parent 432ba576a2
commit c644cf11a7
1 changed files with 6 additions and 0 deletions
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6
gfx/2d/DrawTargetD2D.cpp
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@ -1803,6 +1803,12 @@ DrawTargetD2D::FillGlyphsManual(ScaledFontDWrite *aFont,
RECT bounds;
hr = analysis->GetAlphaTextureBounds(DWRITE_TEXTURE_CLEARTYPE_3x1, &bounds);
if (bounds.bottom <= bounds.top || bounds.right <= bounds.left) {
// DWrite seems to do this sometimes. I'm not 100% sure why. See bug 758980.
gfxDebug() << "Empty alpha texture bounds! Falling back to regular drawing.";
return false;
}
IntRect rectBounds(bounds.left, bounds.top, bounds.right - bounds.left, bounds.bottom - bounds.top);
IntRect surfBounds(IntPoint(0, 0), mSize);