1 files changed, 281 insertions, 0 deletions
diff --git a/gfx/layers/wr/WebRenderImageHost.cpp b/gfx/layers/wr/WebRenderImageHost.cpp
new file mode 100644
index 0000000000..b3e0bf627d
--- /dev/null
+++ b/gfx/layers/wr/WebRenderImageHost.cpp
@@ -0,0 +1,281 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WebRenderImageHost.h"
+
+#include <utility>
+
+#include "mozilla/ScopeExit.h"
+#include "mozilla/layers/AsyncImagePipelineManager.h"
+#include "mozilla/layers/Compositor.h"                // for Compositor
+#include "mozilla/layers/CompositorVsyncScheduler.h"  // for CompositorVsyncScheduler
+#include "mozilla/layers/Effects.h"  // for TexturedEffect, Effect, etc
+#include "mozilla/layers/LayerManagerComposite.h"  // for TexturedEffect, Effect, etc
+#include "mozilla/layers/WebRenderBridgeParent.h"
+#include "mozilla/layers/WebRenderTextureHost.h"
+#include "nsAString.h"
+#include "nsDebug.h"          // for NS_WARNING, NS_ASSERTION
+#include "nsPrintfCString.h"  // for nsPrintfCString
+#include "nsString.h"         // for nsAutoCString
+
+namespace mozilla {
+
+using namespace gfx;
+
+namespace layers {
+
+class ISurfaceAllocator;
+
+WebRenderImageHost::WebRenderImageHost(const TextureInfo& aTextureInfo)
+    : CompositableHost(aTextureInfo),
+      ImageComposite(),
+      mCurrentAsyncImageManager(nullptr) {}
+
+WebRenderImageHost::~WebRenderImageHost() { MOZ_ASSERT(mWrBridges.empty()); }
+
+void WebRenderImageHost::UseTextureHost(
+    const nsTArray<TimedTexture>& aTextures) {
+  CompositableHost::UseTextureHost(aTextures);
+  MOZ_ASSERT(aTextures.Length() >= 1);
+
+  nsTArray<TimedImage> newImages;
+
+  for (uint32_t i = 0; i < aTextures.Length(); ++i) {
+    const TimedTexture& t = aTextures[i];
+    MOZ_ASSERT(t.mTexture);
+    if (i + 1 < aTextures.Length() && t.mProducerID == mLastProducerID &&
+        t.mFrameID < mLastFrameID) {
+      // Ignore frames before a frame that we already composited. We don't
+      // ever want to display these frames. This could be important if
+      // the frame producer adjusts timestamps (e.g. to track the audio clock)
+      // and the new frame times are earlier.
+      continue;
+    }
+    TimedImage& img = *newImages.AppendElement();
+    img.mTextureHost = t.mTexture;
+    img.mTimeStamp = t.mTimeStamp;
+    img.mPictureRect = t.mPictureRect;
+    img.mFrameID = t.mFrameID;
+    img.mProducerID = t.mProducerID;
+    img.mTextureHost->SetCropRect(img.mPictureRect);
+    img.mTextureHost->Updated();
+  }
+
+  SetImages(std::move(newImages));
+
+  if (GetAsyncRef()) {
+    for (const auto& it : mWrBridges) {
+      RefPtr<WebRenderBridgeParent> wrBridge = it.second->WrBridge();
+      if (wrBridge && wrBridge->CompositorScheduler()) {
+        wrBridge->CompositorScheduler()->ScheduleComposition();
+      }
+    }
+  }
+
+  // Video producers generally send replacement images with the same frameID but
+  // slightly different timestamps in order to sync with the audio clock. This
+  // means that any CompositeUntil() call we made in Composite() may no longer
+  // guarantee that we'll composite until the next frame is ready. Fix that
+  // here.
+  if (mLastFrameID >= 0 && !mWrBridges.empty()) {
+    for (const auto& img : Images()) {
+      bool frameComesAfter =
+          img.mFrameID > mLastFrameID || img.mProducerID != mLastProducerID;
+      if (frameComesAfter && !img.mTimeStamp.IsNull()) {
+        for (const auto& it : mWrBridges) {
+          RefPtr<WebRenderBridgeParent> wrBridge = it.second->WrBridge();
+          if (wrBridge) {
+            wrBridge->AsyncImageManager()->CompositeUntil(
+                img.mTimeStamp + TimeDuration::FromMilliseconds(BIAS_TIME_MS));
+          }
+        }
+        break;
+      }
+    }
+  }
+}
+
+void WebRenderImageHost::UseComponentAlphaTextures(
+    TextureHost* aTextureOnBlack, TextureHost* aTextureOnWhite) {
+  MOZ_ASSERT_UNREACHABLE("unexpected to be called");
+}
+
+void WebRenderImageHost::CleanupResources() {
+  ClearImages();
+  SetCurrentTextureHost(nullptr);
+}
+
+void WebRenderImageHost::RemoveTextureHost(TextureHost* aTexture) {
+  CompositableHost::RemoveTextureHost(aTexture);
+  RemoveImagesWithTextureHost(aTexture);
+}
+
+TimeStamp WebRenderImageHost::GetCompositionTime() const {
+  TimeStamp time;
+
+  MOZ_ASSERT(mCurrentAsyncImageManager);
+  if (mCurrentAsyncImageManager) {
+    time = mCurrentAsyncImageManager->GetCompositionTime();
+  }
+  return time;
+}
+
+CompositionOpportunityId WebRenderImageHost::GetCompositionOpportunityId()
+    const {
+  CompositionOpportunityId id;
+
+  MOZ_ASSERT(mCurrentAsyncImageManager);
+  if (mCurrentAsyncImageManager) {
+    id = mCurrentAsyncImageManager->GetCompositionOpportunityId();
+  }
+  return id;
+}
+
+void WebRenderImageHost::AppendImageCompositeNotification(
+    const ImageCompositeNotificationInfo& aInfo) const {
+  if (mCurrentAsyncImageManager) {
+    mCurrentAsyncImageManager->AppendImageCompositeNotification(aInfo);
+  }
+}
+
+TextureHost* WebRenderImageHost::GetAsTextureHost(IntRect* aPictureRect) {
+  MOZ_ASSERT_UNREACHABLE("unexpected to be called");
+  return nullptr;
+}
+
+TextureHost* WebRenderImageHost::GetAsTextureHostForComposite(
+    AsyncImagePipelineManager* aAsyncImageManager) {
+  mCurrentAsyncImageManager = aAsyncImageManager;
+  const auto onExit =
+      mozilla::MakeScopeExit([&]() { mCurrentAsyncImageManager = nullptr; });
+
+  int imageIndex = ChooseImageIndex();
+  if (imageIndex < 0) {
+    SetCurrentTextureHost(nullptr);
+    return nullptr;
+  }
+
+  if (uint32_t(imageIndex) + 1 < ImagesCount()) {
+    mCurrentAsyncImageManager->CompositeUntil(
+        GetImage(imageIndex + 1)->mTimeStamp +
+        TimeDuration::FromMilliseconds(BIAS_TIME_MS));
+  }
+
+  const TimedImage* img = GetImage(imageIndex);
+  SetCurrentTextureHost(img->mTextureHost);
+
+  if (mCurrentAsyncImageManager->GetCompositionTime()) {
+    // We are in a composition. Send ImageCompositeNotifications.
+    OnFinishRendering(imageIndex, img, mAsyncRef.mProcessId, mAsyncRef.mHandle);
+  }
+
+  return mCurrentTextureHost;
+}
+
+void WebRenderImageHost::SetCurrentTextureHost(TextureHost* aTexture) {
+  if (aTexture == mCurrentTextureHost.get()) {
+    return;
+  }
+  mCurrentTextureHost = aTexture;
+}
+
+void WebRenderImageHost::Attach(Layer* aLayer, TextureSourceProvider* aProvider,
+                                AttachFlags aFlags) {}
+
+void WebRenderImageHost::Composite(
+    Compositor* aCompositor, LayerComposite* aLayer, EffectChain& aEffectChain,
+    float aOpacity, const gfx::Matrix4x4& aTransform,
+    const gfx::SamplingFilter aSamplingFilter, const gfx::IntRect& aClipRect,
+    const nsIntRegion* aVisibleRegion, const Maybe<gfx::Polygon>& aGeometry) {
+  MOZ_ASSERT_UNREACHABLE("unexpected to be called");
+}
+
+void WebRenderImageHost::SetTextureSourceProvider(
+    TextureSourceProvider* aProvider) {
+  if (mTextureSourceProvider != aProvider) {
+    for (const auto& img : Images()) {
+      img.mTextureHost->SetTextureSourceProvider(aProvider);
+    }
+  }
+  CompositableHost::SetTextureSourceProvider(aProvider);
+}
+
+void WebRenderImageHost::PrintInfo(std::stringstream& aStream,
+                                   const char* aPrefix) {
+  aStream << aPrefix;
+  aStream << nsPrintfCString("WebRenderImageHost (0x%p)", this).get();
+
+  nsAutoCString pfx(aPrefix);
+  pfx += "  ";
+  for (const auto& img : Images()) {
+    aStream << "\n";
+    img.mTextureHost->PrintInfo(aStream, pfx.get());
+    aStream << " [picture-rect=" << img.mPictureRect << "]";
+  }
+}
+
+void WebRenderImageHost::Dump(std::stringstream& aStream, const char* aPrefix,
+                              bool aDumpHtml) {
+  for (const auto& img : Images()) {
+    aStream << aPrefix;
+    aStream << (aDumpHtml ? "<ul><li>TextureHost: " : "TextureHost: ");
+    DumpTextureHost(aStream, img.mTextureHost);
+    aStream << (aDumpHtml ? " </li></ul> " : " ");
+  }
+}
+
+already_AddRefed<gfx::DataSourceSurface> WebRenderImageHost::GetAsSurface() {
+  MOZ_ASSERT_UNREACHABLE("unexpected to be called");
+  return nullptr;
+}
+
+bool WebRenderImageHost::Lock() {
+  MOZ_ASSERT_UNREACHABLE("unexpected to be called");
+  return false;
+}
+
+void WebRenderImageHost::Unlock() {
+  MOZ_ASSERT_UNREACHABLE("unexpected to be called");
+}
+
+IntSize WebRenderImageHost::GetImageSize() {
+  const TimedImage* img = ChooseImage();
+  if (img) {
+    return IntSize(img->mPictureRect.Width(), img->mPictureRect.Height());
+  }
+  return IntSize();
+}
+
+void WebRenderImageHost::SetWrBridge(const wr::PipelineId& aPipelineId,
+                                     WebRenderBridgeParent* aWrBridge) {
+  MOZ_ASSERT(aWrBridge);
+  MOZ_ASSERT(!mCurrentAsyncImageManager);
+#ifdef DEBUG
+  const auto it = mWrBridges.find(wr::AsUint64(aPipelineId));
+  MOZ_ASSERT(it == mWrBridges.end());
+#endif
+  RefPtr<WebRenderBridgeParentRef> ref =
+      aWrBridge->GetWebRenderBridgeParentRef();
+  mWrBridges.emplace(wr::AsUint64(aPipelineId), ref);
+}
+
+void WebRenderImageHost::ClearWrBridge(const wr::PipelineId& aPipelineId,
+                                       WebRenderBridgeParent* aWrBridge) {
+  MOZ_ASSERT(aWrBridge);
+  MOZ_ASSERT(!mCurrentAsyncImageManager);
+
+  const auto it = mWrBridges.find(wr::AsUint64(aPipelineId));
+  MOZ_ASSERT(it != mWrBridges.end());
+  if (it == mWrBridges.end()) {
+    gfxCriticalNote << "WrBridge mismatch happened";
+    return;
+  }
+  mWrBridges.erase(it);
+  SetCurrentTextureHost(nullptr);
+}
+
+}  // namespace layers
+}  // namespace mozilla