1 files changed, 141 insertions, 0 deletions
diff --git a/gfx/layers/composite/CanvasLayerComposite.cpp b/gfx/layers/composite/CanvasLayerComposite.cpp
new file mode 100644
index 0000000000..9b1d4aa78b
--- /dev/null
+++ b/gfx/layers/composite/CanvasLayerComposite.cpp
@@ -0,0 +1,141 @@
+/* -*- 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 "CanvasLayerComposite.h"
+#include "composite/CompositableHost.h"  // for CompositableHost
+#include "gfx2DGlue.h"                   // for ToFilter
+#include "gfxEnv.h"                      // for gfxEnv, etc
+#include "mozilla/gfx/Matrix.h"          // for Matrix4x4
+#include "mozilla/gfx/Point.h"           // for Point
+#include "mozilla/gfx/Rect.h"            // for Rect
+#include "mozilla/layers/Compositor.h"   // for Compositor
+#include "mozilla/layers/Effects.h"      // for EffectChain
+#include "mozilla/layers/LayerManagerCompositeUtils.h"
+#include "mozilla/mozalloc.h"  // for operator delete
+#include "nsAString.h"
+#include "mozilla/RefPtr.h"   // for nsRefPtr
+#include "nsISupportsImpl.h"  // for MOZ_COUNT_CTOR, etc
+#include "nsString.h"         // for nsAutoCString
+
+namespace mozilla {
+namespace layers {
+
+using namespace mozilla::gfx;
+
+CanvasLayerComposite::CanvasLayerComposite(LayerManagerComposite* aManager)
+    : CanvasLayer(aManager, nullptr),
+      LayerComposite(aManager),
+      mCompositableHost(nullptr) {
+  MOZ_COUNT_CTOR(CanvasLayerComposite);
+  mImplData = static_cast<LayerComposite*>(this);
+}
+
+CanvasLayerComposite::~CanvasLayerComposite() {
+  MOZ_COUNT_DTOR(CanvasLayerComposite);
+
+  CleanupResources();
+}
+
+bool CanvasLayerComposite::SetCompositableHost(CompositableHost* aHost) {
+  switch (aHost->GetType()) {
+    case CompositableType::IMAGE: {
+      if (mCompositableHost && aHost != mCompositableHost) {
+        mCompositableHost->Detach(this);
+      }
+      mCompositableHost = aHost;
+      return true;
+    }
+    default:
+      return false;
+  }
+}
+
+Layer* CanvasLayerComposite::GetLayer() { return this; }
+
+void CanvasLayerComposite::SetLayerManager(HostLayerManager* aManager) {
+  LayerComposite::SetLayerManager(aManager);
+  mManager = aManager;
+  if (mCompositableHost && mCompositor) {
+    mCompositableHost->SetTextureSourceProvider(mCompositor);
+  }
+}
+
+void CanvasLayerComposite::RenderLayer(const IntRect& aClipRect,
+                                       const Maybe<gfx::Polygon>& aGeometry) {
+  if (!mCompositableHost || !mCompositableHost->IsAttached()) {
+    return;
+  }
+
+  mCompositor->MakeCurrent();
+
+#ifdef MOZ_DUMP_PAINTING
+  if (gfxEnv::DumpCompositorTextures()) {
+    RefPtr<gfx::DataSourceSurface> surf = mCompositableHost->GetAsSurface();
+    if (surf) {
+      WriteSnapshotToDumpFile(this, surf);
+    }
+  }
+#endif
+
+  RenderWithAllMasks(this, mCompositor, aClipRect,
+                     [&](EffectChain& effectChain, const IntRect& clipRect) {
+                       mCompositableHost->Composite(
+                           mCompositor, this, effectChain,
+                           GetEffectiveOpacity(), GetEffectiveTransform(),
+                           GetSamplingFilter(), clipRect);
+                     });
+
+  mCompositableHost->BumpFlashCounter();
+}
+
+CompositableHost* CanvasLayerComposite::GetCompositableHost() {
+  if (mCompositableHost && mCompositableHost->IsAttached()) {
+    return mCompositableHost.get();
+  }
+
+  return nullptr;
+}
+
+void CanvasLayerComposite::CleanupResources() {
+  if (mCompositableHost) {
+    mCompositableHost->Detach(this);
+  }
+  mCompositableHost = nullptr;
+}
+
+gfx::SamplingFilter CanvasLayerComposite::GetSamplingFilter() {
+  gfx::SamplingFilter filter = mSamplingFilter;
+#ifdef ANDROID
+  // Bug 691354
+  // Using the LINEAR filter we get unexplained artifacts.
+  // Use NEAREST when no scaling is required.
+  Matrix matrix;
+  bool is2D = GetEffectiveTransform().Is2D(&matrix);
+  if (is2D && !ThebesMatrix(matrix).HasNonTranslationOrFlip()) {
+    filter = SamplingFilter::POINT;
+  }
+#endif
+  return filter;
+}
+
+void CanvasLayerComposite::GenEffectChain(EffectChain& aEffect) {
+  aEffect.mLayerRef = this;
+  aEffect.mPrimaryEffect = mCompositableHost->GenEffect(GetSamplingFilter());
+}
+
+void CanvasLayerComposite::PrintInfo(std::stringstream& aStream,
+                                     const char* aPrefix) {
+  CanvasLayer::PrintInfo(aStream, aPrefix);
+  aStream << "\n";
+  if (mCompositableHost && mCompositableHost->IsAttached()) {
+    nsAutoCString pfx(aPrefix);
+    pfx += "  ";
+    mCompositableHost->PrintInfo(aStream, pfx.get());
+  }
+}
+
+}  // namespace layers
+}  // namespace mozilla