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Bug 663776. Part 1: When determining whether the scale factors hav changed, we need to use GetBaseTransform for the old scale factors, because that's what stores the old transform that we computed scale factors from. r=mattwoodrow

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This commit is contained in:
Robert O'Callahan 2012-12-07 12:58:12 +13:00
parent 25f9b02ce9
commit 70681911f9
1 changed files with 3 additions and 2 deletions
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5
layout/base/FrameLayerBuilder.cpp
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@ -2783,10 +2783,11 @@ ChooseScaleAndSetTransform(FrameLayerBuilder* aLayerBuilder,
// or it was previously unscaled.
bool clamp = true;
gfxMatrix oldFrameTransform2d;
if (aLayer->GetTransform().Is2D(&oldFrameTransform2d)) {
if (aLayer->GetBaseTransform().Is2D(&oldFrameTransform2d)) {
gfxSize oldScale = oldFrameTransform2d.ScaleFactors(true);
if (oldScale == scale || oldScale == gfxSize(1.0, 1.0))
if (oldScale == scale || oldScale == gfxSize(1.0, 1.0)) {
clamp = false;
}
}
if (clamp) {
scale.width = gfxUtils::ClampToScaleFactor(scale.width);