void
AppendToString(std::stringstream& aStream, const ScrollMetadata& m,
const char* pfx, const char* sfx)
{
aStream << pfx;
AppendToString(aStream, m.GetMetrics(), "{ [metrics=");
AppendToString(aStream, m.GetBackgroundColor(), "] [color=");
if (m.GetScrollParentId() != FrameMetrics::NULL_SCROLL_ID) {
AppendToString(aStream, m.GetScrollParentId(), "] [scrollParent=");
}
if (m.HasScrollClip()) {
AppendToString(aStream, m.ScrollClip().GetClipRect(), "] [clip=");
}
if (m.HasMaskLayer()) {
AppendToString(aStream, m.ScrollClip().GetMaskLayerIndex().value(), "] [mask=");
}
OverscrollBehavior overscrollX = m.GetOverscrollBehavior().mBehaviorX;
OverscrollBehavior overscrollY = m.GetOverscrollBehavior().mBehaviorY;
if (overscrollX == overscrollY && overscrollX != OverscrollBehavior::Auto) {
AppendToString(aStream, overscrollX, "] [overscroll=");
} else {
if (overscrollX != OverscrollBehavior::Auto) {
AppendToString(aStream, overscrollX, "] [overscroll-x=");
}
if (overscrollY != OverscrollBehavior::Auto) {
AppendToString(aStream, overscrollY, "] [overscroll-y=");
}
}
aStream << "] }" << sfx;
}
size_t WebRenderScrollData::AddMetadata(const ScrollMetadata& aMetadata) {
ScrollableLayerGuid::ViewID scrollId = aMetadata.GetMetrics().GetScrollId();
auto insertResult = mScrollIdMap.insert(std::make_pair(scrollId, 0));
if (insertResult.second) {
// Insertion took place, therefore it's a scrollId we hadn't seen before
insertResult.first->second = mScrollMetadatas.Length();
mScrollMetadatas.AppendElement(aMetadata);
} // else we didn't insert, because it already existed
return insertResult.first->second;
}
void
AppendToString(std::stringstream& aStream, const ScrollMetadata& m,
const char* pfx, const char* sfx)
{
aStream << pfx;
AppendToString(aStream, m.GetMetrics(), "{ [metrics=", "]");
if (m.HasClipRect()) {
AppendToString(aStream, m.ClipRect(), " [clip=", "]");
}
aStream << "}" << sfx;
}
void
AppendToString(std::stringstream& aStream, const ScrollMetadata& m,
const char* pfx, const char* sfx)
{
aStream << pfx;
AppendToString(aStream, m.GetMetrics(), "{ [metrics=");
AppendToString(aStream, m.GetBackgroundColor(), "] [color=");
if (m.GetScrollParentId() != FrameMetrics::NULL_SCROLL_ID) {
AppendToString(aStream, m.GetScrollParentId(), "] [scrollParent=");
}
if (m.HasScrollClip()) {
AppendToString(aStream, m.ScrollClip().GetClipRect(), "] [clip=");
}
aStream << "] }" << sfx;
}
TEST_F(APZCBasicTester, ComplexTransform) {
// This test assumes there is a page that gets rendered to
// two layers. In CSS pixels, the first layer is 50x50 and
// the second layer is 25x50. The widget scale factor is 3.0
// and the presShell resolution is 2.0. Therefore, these layers
// end up being 300x300 and 150x300 in layer pixels.
//
// The second (child) layer has an additional CSS transform that
// stretches it by 2.0 on the x-axis. Therefore, after applying
// CSS transforms, the two layers are the same size in screen
// pixels.
//
// The screen itself is 24x24 in screen pixels (therefore 4x4 in
// CSS pixels). The displayport is 1 extra CSS pixel on all
// sides.
RefPtr<TestAsyncPanZoomController> childApzc =
new TestAsyncPanZoomController(0, mcc, tm);
const char* layerTreeSyntax = "c(c)";
// LayerID 0 1
nsIntRegion layerVisibleRegion[] = {
nsIntRegion(IntRect(0, 0, 300, 300)),
nsIntRegion(IntRect(0, 0, 150, 300)),
};
Matrix4x4 transforms[] = {
Matrix4x4(),
Matrix4x4(),
};
transforms[0].PostScale(0.5f, 0.5f, 1.0f); // this results from the 2.0 resolution on the root layer
transforms[1].PostScale(2.0f, 1.0f, 1.0f); // this is the 2.0 x-axis CSS transform on the child layer
nsTArray<RefPtr<Layer> > layers;
RefPtr<LayerManager> lm;
RefPtr<Layer> root = CreateLayerTree(layerTreeSyntax, layerVisibleRegion, transforms, lm, layers);
ScrollMetadata metadata;
FrameMetrics& metrics = metadata.GetMetrics();
metrics.SetCompositionBounds(ParentLayerRect(0, 0, 24, 24));
metrics.SetDisplayPort(CSSRect(-1, -1, 6, 6));
metrics.SetScrollOffset(CSSPoint(10, 10));
metrics.SetScrollableRect(CSSRect(0, 0, 50, 50));
metrics.SetCumulativeResolution(LayoutDeviceToLayerScale2D(2, 2));
metrics.SetPresShellResolution(2.0f);
metrics.SetZoom(CSSToParentLayerScale2D(6, 6));
metrics.SetDevPixelsPerCSSPixel(CSSToLayoutDeviceScale(3));
metrics.SetScrollId(FrameMetrics::START_SCROLL_ID);
ScrollMetadata childMetadata = metadata;
FrameMetrics& childMetrics = childMetadata.GetMetrics();
childMetrics.SetScrollId(FrameMetrics::START_SCROLL_ID + 1);
layers[0]->SetScrollMetadata(metadata);
layers[1]->SetScrollMetadata(childMetadata);
ParentLayerPoint pointOut;
AsyncTransform viewTransformOut;
// Both the parent and child layer should behave exactly the same here, because
// the CSS transform on the child layer does not affect the SampleContentTransformForFrame code
// initial transform
apzc->SetFrameMetrics(metrics);
apzc->NotifyLayersUpdated(metadata, true, true);
apzc->SampleContentTransformForFrame(&viewTransformOut, pointOut);
EXPECT_EQ(AsyncTransform(LayerToParentLayerScale(1), ParentLayerPoint()), viewTransformOut);
EXPECT_EQ(ParentLayerPoint(60, 60), pointOut);
childApzc->SetFrameMetrics(childMetrics);
childApzc->NotifyLayersUpdated(childMetadata, true, true);
childApzc->SampleContentTransformForFrame(&viewTransformOut, pointOut);
EXPECT_EQ(AsyncTransform(LayerToParentLayerScale(1), ParentLayerPoint()), viewTransformOut);
EXPECT_EQ(ParentLayerPoint(60, 60), pointOut);
// do an async scroll by 5 pixels and check the transform
metrics.ScrollBy(CSSPoint(5, 0));
apzc->SetFrameMetrics(metrics);
apzc->SampleContentTransformForFrame(&viewTransformOut, pointOut);
EXPECT_EQ(AsyncTransform(LayerToParentLayerScale(1), ParentLayerPoint(-30, 0)), viewTransformOut);
EXPECT_EQ(ParentLayerPoint(90, 60), pointOut);
childMetrics.ScrollBy(CSSPoint(5, 0));
childApzc->SetFrameMetrics(childMetrics);
childApzc->SampleContentTransformForFrame(&viewTransformOut, pointOut);
EXPECT_EQ(AsyncTransform(LayerToParentLayerScale(1), ParentLayerPoint(-30, 0)), viewTransformOut);
EXPECT_EQ(ParentLayerPoint(90, 60), pointOut);
// do an async zoom of 1.5x and check the transform
metrics.ZoomBy(1.5f);
apzc->SetFrameMetrics(metrics);
apzc->SampleContentTransformForFrame(&viewTransformOut, pointOut);
EXPECT_EQ(AsyncTransform(LayerToParentLayerScale(1.5), ParentLayerPoint(-45, 0)), viewTransformOut);
EXPECT_EQ(ParentLayerPoint(135, 90), pointOut);
childMetrics.ZoomBy(1.5f);
childApzc->SetFrameMetrics(childMetrics);
childApzc->SampleContentTransformForFrame(&viewTransformOut, pointOut);
EXPECT_EQ(AsyncTransform(LayerToParentLayerScale(1.5), ParentLayerPoint(-45, 0)), viewTransformOut);
EXPECT_EQ(ParentLayerPoint(135, 90), pointOut);
childApzc->Destroy();
}
static ScrollMetadata
MakeMetadata(FrameMetrics::ViewID aId) {
ScrollMetadata metadata;
metadata.GetMetrics().SetScrollId(aId);
return metadata;
}