Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       2             :  * This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #include "WebRenderDisplayItemLayer.h"
       7             : 
       8             : #include "LayersLogging.h"
       9             : #include "mozilla/webrender/webrender_ffi.h"
      10             : #include "mozilla/webrender/WebRenderTypes.h"
      11             : #include "mozilla/layers/ScrollingLayersHelper.h"
      12             : #include "mozilla/layers/StackingContextHelper.h"
      13             : #include "mozilla/layers/WebRenderBridgeChild.h"
      14             : #include "nsDisplayList.h"
      15             : #include "mozilla/gfx/Matrix.h"
      16             : #include "UnitTransforms.h"
      17             : 
      18             : namespace mozilla {
      19             : namespace layers {
      20             : 
      21           0 : WebRenderDisplayItemLayer::~WebRenderDisplayItemLayer()
      22             : {
      23           0 :   MOZ_COUNT_DTOR(WebRenderDisplayItemLayer);
      24           0 : }
      25             : 
      26             : void
      27           0 : WebRenderDisplayItemLayer::RenderLayer(wr::DisplayListBuilder& aBuilder,
      28             :                                        const StackingContextHelper& aSc)
      29             : {
      30           0 :   if (mVisibleRegion.IsEmpty()) {
      31           0 :     return;
      32             :   }
      33             : 
      34           0 :   ScrollingLayersHelper scroller(this, aBuilder, aSc);
      35             : 
      36           0 :   if (mItem) {
      37             :     WrSize contentSize; // this won't actually be used by anything
      38           0 :     wr::DisplayListBuilder builder(WrBridge()->GetPipeline(), contentSize);
      39             :     // We might have recycled this layer. Throw away the old commands.
      40           0 :     mParentCommands.Clear();
      41             : 
      42           0 :     mItem->CreateWebRenderCommands(builder, aSc, mParentCommands, WrManager(),
      43           0 :                                    GetDisplayListBuilder());
      44           0 :     builder.Finalize(contentSize, mBuiltDisplayList);
      45             :   } else {
      46             :     // else we have an empty transaction and just use the
      47             :     // old commands.
      48           0 :     WebRenderLayerManager* manager = WrManager();
      49           0 :     MOZ_ASSERT(manager);
      50             : 
      51             :     // Since our recording relies on our parent layer's transform and stacking context
      52             :     // If this layer or our parent changed, this empty transaction won't work.
      53           0 :     if (manager->IsMutatedLayer(this) || manager->IsMutatedLayer(GetParent())) {
      54           0 :       manager->SetTransactionIncomplete();
      55           0 :       return;
      56             :     }
      57             :   }
      58             : 
      59           0 :   aBuilder.PushBuiltDisplayList(mBuiltDisplayList);
      60           0 :   WrBridge()->AddWebRenderParentCommands(mParentCommands);
      61             : }
      62             : 
      63             : } // namespace layers
      64             : } // namespace mozilla