1 files changed, 97 insertions, 0 deletions
diff --git a/gfx/layers/client/CanvasClient.cpp b/gfx/layers/client/CanvasClient.cpp
new file mode 100644
index 0000000000..2040dae6bf
--- /dev/null
+++ b/gfx/layers/client/CanvasClient.cpp
@@ -0,0 +1,97 @@
+/* -*- 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 "CanvasClient.h"
+
+#include "ClientCanvasLayer.h"     // for ClientCanvasLayer
+#include "gfx2DGlue.h"             // for ImageFormatToSurfaceFormat
+#include "gfxPlatform.h"           // for gfxPlatform
+#include "mozilla/gfx/BaseSize.h"  // for BaseSize
+#include "mozilla/gfx/gfxVars.h"
+#include "mozilla/layers/BufferTexture.h"
+#include "mozilla/layers/CompositableForwarder.h"
+#include "mozilla/layers/CompositorBridgeChild.h"  // for CompositorBridgeChild
+#include "mozilla/layers/LayersTypes.h"
+#include "mozilla/layers/OOPCanvasRenderer.h"
+#include "mozilla/layers/TextureClient.h"  // for TextureClient, etc
+#include "mozilla/layers/TextureClientOGL.h"
+#include "mozilla/layers/TextureClientRecycleAllocator.h"
+#include "nsDebug.h"      // for printf_stderr, NS_ASSERTION
+#include "nsXULAppAPI.h"  // for XRE_GetProcessType, etc
+
+using namespace mozilla::gfx;
+using namespace mozilla::gl;
+
+namespace mozilla {
+namespace layers {
+
+void CanvasClient::UseTexture(TextureClient* const aTexture) {
+  MOZ_ASSERT(aTexture);
+
+  const auto isClientNonPremult =
+      bool(mTextureFlags & TextureFlags::NON_PREMULTIPLIED);
+  const auto isTextureNonPremult =
+      bool(aTexture->GetFlags() & TextureFlags::NON_PREMULTIPLIED);
+  MOZ_ALWAYS_TRUE(isTextureNonPremult == isClientNonPremult);
+
+  bool changed = false;
+
+  if (aTexture != mFrontBuffer) {
+    if (!aTexture->IsSharedWithCompositor()) {
+      if (!AddTextureClient(aTexture)) {
+        return;
+      }
+    }
+    changed = true;
+    mFrontBuffer = aTexture;
+  }
+
+  AutoTArray<CompositableForwarder::TimedTextureClient, 1> textures;
+  CompositableForwarder::TimedTextureClient* t = textures.AppendElement();
+  t->mTextureClient = aTexture;
+  t->mPictureRect = nsIntRect(nsIntPoint(0, 0), aTexture->GetSize());
+  t->mFrameID = mFrameID;
+
+  GetForwarder()->UseTextures(this, textures);
+  if (changed) {
+    aTexture->SyncWithObject(GetForwarder()->GetSyncObject());
+  }
+}
+
+static constexpr bool kIsWindows =
+#ifdef XP_WIN
+    true;
+#else
+    false;
+#endif
+
+RefPtr<TextureClient> CanvasClient::CreateTextureClientForCanvas(
+    const gfx::SurfaceFormat aFormat, const gfx::IntSize aSize,
+    const TextureFlags aFlags) {
+  if (kIsWindows) {
+    // With WebRender, host side uses data of TextureClient longer.
+    // Then back buffer reuse in CanvasClient2D::Update() does not work. It
+    // causes a lot of TextureClient allocations. For reducing the allocations,
+    // TextureClientRecycler is used.
+    if (GetForwarder() && GetForwarder()->GetCompositorBackendType() ==
+                              LayersBackend::LAYERS_WR) {
+      return GetTextureClientRecycler()->CreateOrRecycle(
+          aFormat, aSize, BackendSelector::Canvas, mTextureFlags | aFlags);
+    }
+    return CreateTextureClientForDrawing(
+        aFormat, aSize, BackendSelector::Canvas, mTextureFlags | aFlags);
+  }
+
+  // XXX - We should use CreateTextureClientForDrawing, but we first need
+  // to use double buffering.
+  gfx::BackendType backend =
+      gfxPlatform::GetPlatform()->GetPreferredCanvasBackend();
+  return TextureClient::CreateForRawBufferAccess(
+      GetForwarder(), aFormat, aSize, backend, mTextureFlags | aFlags);
+}
+
+}  // namespace layers
+}  // namespace mozilla