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Backed out changeset bb78095fd8c0 (bug 1728411) for causing wpt failures on SVGGraphicsElement.getBBox-01.html

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criss 2021-09-01 05:49:25 +03:00
parent f97f02f5a8
commit b68bc8bbb9
1 changed files with 11 additions and 0 deletions
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11
layout/svg/SVGGeometryFrame.cpp
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@ -479,7 +479,18 @@ SVGBBox SVGGeometryFrame::GetBBoxContribution(const Matrix& aToBBoxUserspace,
} else {
// Get the bounds using a Moz2D Path object (more expensive):
RefPtr<DrawTarget> tmpDT;
#ifdef XP_WIN
// Unfortunately D2D backed DrawTarget produces bounds with rounding errors
// when whole number results are expected, even in the case of trivial
// calculations. To avoid that and meet the expectations of web content we
// have to use a CAIRO DrawTarget. The most efficient way to do that is to
// wrap the cached cairo_surface_t from ScreenReferenceSurface():
RefPtr<gfxASurface> refSurf =
gfxPlatform::GetPlatform()->ScreenReferenceSurface();
tmpDT = gfxPlatform::CreateDrawTargetForSurface(refSurf, IntSize(1, 1));
#else
tmpDT = gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget();
#endif
FillRule fillRule = SVGUtils::ToFillRule(
HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD) ? StyleSVG()->mClipRule