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Issue #438: Do not round the translation of an SVG frame.

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This doesn't solve the blurriness yet, but is part of the problem.
This commit is contained in:
wolfbeast 2019-08-14 13:35:08 +02:00 • committed by Roy Tam
commit 8a29ec9a3f
5 changed files with 36 additions and 6 deletions
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10
layout/base/nsDisplayList.cpp
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@ -5917,6 +5917,12 @@ nsDisplayTransform::GetResultingTransformMatrixInternal(const FrameTransformProp
frame && frame->IsSVGTransformed(&svgTransform, &transformFromSVGParent);
bool hasTransformFromSVGParent =
hasSVGTransforms && !transformFromSVGParent.IsIdentity();
// An SVG frame should not have its translation rounded.
// Note it's possible that the SVG frame doesn't have an SVG
// transform but only has a CSS transform.
bool shouldRound = !(frame && frame->IsFrameOfType(nsIFrame::eSVG));
/* Transformed frames always have a transform, or are preserving 3d (and might still have perspective!) */
if (aProperties.mTransformList) {
result = nsStyleTransformMatrix::ReadTransforms(aProperties.mTransformList->mHead,
@ -5994,7 +6000,7 @@ nsDisplayTransform::GetResultingTransformMatrixInternal(const FrameTransformProp
// Otherwise we need to manually translate into our parent's coordinate
// space.
if (frame->IsTransformed()) {
nsLayoutUtils::PostTranslate(result, frame->GetPosition(), aAppUnitsPerPixel, !hasSVGTransforms);
nsLayoutUtils::PostTranslate(result, frame->GetPosition(), aAppUnitsPerPixel, shouldRound);
}
Matrix4x4 parent =
GetResultingTransformMatrixInternal(props,
@ -6005,7 +6011,7 @@ nsDisplayTransform::GetResultingTransformMatrixInternal(const FrameTransformProp
}
if (aFlags & OFFSET_BY_ORIGIN) {
nsLayoutUtils::PostTranslate(result, aOrigin, aAppUnitsPerPixel, !hasSVGTransforms);
nsLayoutUtils::PostTranslate(result, aOrigin, aAppUnitsPerPixel, shouldRound);
}
return result;