9ad40e6fb9
For various reasons, we want to be pushing the layer's local clip rect outside of the stacking context rather than inside it. Not only is this more correct with respect to the semantics of the layer tree, we also need it in order to properly handle fixed-positioning of layers with async scrolling. This patch does the bulk of the work to make this happen. Most of the code in the individual layer classes to process the layer's local clip rect is removed, and instead a function in ScrollingLayersHelper is added to deal with it. There are a couple of places that individual layer classes still handle this but those will be removed in future patches. Note that the individual layer classes still need to provide a clip rect of some sort in order to push their display items, and now they simply use their visible region bounds for this purpose. MozReview-Commit-ID: IBmfUdJwYx1
48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WebRenderTextLayer.h"
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#include "gfxPrefs.h"
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#include "LayersLogging.h"
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#include "mozilla/webrender/WebRenderTypes.h"
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#include "mozilla/layers/ScrollingLayersHelper.h"
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#include "mozilla/layers/WebRenderBridgeChild.h"
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#include "mozilla/gfx/2D.h"
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namespace mozilla {
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namespace layers {
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using namespace mozilla::gfx;
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void
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WebRenderTextLayer::RenderLayer(wr::DisplayListBuilder& aBuilder,
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const StackingContextHelper& aSc)
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{
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if (mBounds.IsEmpty()) {
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return;
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}
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ScrollingLayersHelper scroller(this, aBuilder, aSc);
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LayerRect rect = LayerRect::FromUnknownRect(
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// I am not 100% sure this is correct, but it probably is. Because:
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// the bounds are in layer space, and when gecko composites layers it
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// applies the transform to the layer before compositing. However with
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// WebRender compositing, we don't pass the transform on this layer to
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// WR, so WR has no way of knowing about the transformed bounds unless
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// we apply it here. The glyphs that we push to WR should already be
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// taking the transform into account.
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GetTransform().TransformBounds(IntRectToRect(mBounds))
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);
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DumpLayerInfo("TextLayer", rect);
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WrBridge()->PushGlyphs(aBuilder, mGlyphs, mFont, aSc, rect, rect);
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}
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} // namespace layers
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} // namespace mozilla
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