gfx/layers/wr/WebRenderCanvasRenderer.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "WebRenderCanvasRenderer.h"
   8
   9 #include "GLContext.h"
  10 #include "GLScreenBuffer.h"
  11 #include "mozilla/layers/CompositorBridgeChild.h"
  12 #include "mozilla/StaticPrefs_webgl.h"
  13 #include "SharedSurfaceGL.h"
  14 #include "WebRenderBridgeChild.h"
  15
  16 namespace mozilla {
  17 namespace layers {
  18
  19 CompositableForwarder* WebRenderCanvasRenderer::GetForwarder() {
  20   return mManager->WrBridge();
  21 }
  22
  23 WebRenderCanvasRendererAsync::~WebRenderCanvasRendererAsync() {
  24   if (mPipelineId.isSome()) {
  25     mManager->RemovePipelineIdForCompositable(mPipelineId.ref());
  26     mPipelineId.reset();
  27   }
  28 }
  29
  30 void WebRenderCanvasRendererAsync::Initialize(const CanvasRendererData& aData) {
  31   WebRenderCanvasRenderer::Initialize(aData);
  32
  33   ClearCachedResources();
  34 }
  35
  36 bool WebRenderCanvasRendererAsync::CreateCompositable() {
  37   if (!mCanvasClient) {
  38     auto compositableFlags = TextureFlags::NO_FLAGS;
  39     if (!mData.mIsAlphaPremult) {
  40       // WR needs this flag marked on the compositable, not just the texture.
  41       compositableFlags |= TextureFlags::NON_PREMULTIPLIED;
  42     }
  43     mCanvasClient = new CanvasClient(GetForwarder(), compositableFlags);
  44     mCanvasClient->Connect();
  45   }
  46   return true;
  47 }
  48
  49 void WebRenderCanvasRendererAsync::EnsurePipeline() {
  50   MOZ_ASSERT(mCanvasClient);
  51   if (!mCanvasClient) {
  52     return;
  53   }
  54
  55   if (mPipelineId) {
  56     return;
  57   }
  58
  59   // Alloc async image pipeline id.
  60   mPipelineId = Some(
  61       mManager->WrBridge()->GetCompositorBridgeChild()->GetNextPipelineId());
  62   mManager->AddPipelineIdForCompositable(
  63       mPipelineId.ref(), mCanvasClient->GetIPCHandle(),
  64       CompositableHandleOwner::WebRenderBridge);
  65 }
  66
  67 bool WebRenderCanvasRendererAsync::HasPipeline() {
  68   return mPipelineId.isSome();
  69 }
  70
  71 void WebRenderCanvasRendererAsync::ClearCachedResources() {
  72   if (mPipelineId.isSome()) {
  73     mManager->RemovePipelineIdForCompositable(mPipelineId.ref());
  74     mPipelineId.reset();
  75   }
  76 }
  77
  78 void WebRenderCanvasRendererAsync::
  79     UpdateCompositableClientForEmptyTransaction() {
  80   bool wasDirty = IsDirty();
  81   UpdateCompositableClient();
  82   if (wasDirty && mPipelineId.isSome()) {
  83     // Notify an update of async image pipeline during empty transaction.
  84     // During non empty transaction, WebRenderBridgeParent receives
  85     // OpUpdateAsyncImagePipeline message, but during empty transaction, the
  86     // message is not sent to WebRenderBridgeParent. Then
  87     // OpUpdatedAsyncImagePipeline is used to notify the update.
  88     mManager->AddWebRenderParentCommand(
  89         OpUpdatedAsyncImagePipeline(mPipelineId.ref()));
  90   }
  91 }
  92
  93 }  // namespace layers
  94 }  // namespace mozilla