1 files changed, 104 insertions, 0 deletions
diff --git a/gfx/layers/GPUVideoImage.h b/gfx/layers/GPUVideoImage.h
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+++ b/gfx/layers/GPUVideoImage.h
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+/* -*- 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/. */
+
+#ifndef GFX_GPU_VIDEO_IMAGE_H
+#define GFX_GPU_VIDEO_IMAGE_H
+
+#include "mozilla/RefPtr.h"
+#include "ImageContainer.h"
+#include "mozilla/layers/GPUVideoTextureClient.h"
+#include "mozilla/layers/CompositableClient.h"
+#include "mozilla/layers/ImageBridgeChild.h"
+
+namespace mozilla {
+namespace gl {
+class GLBlitHelper;
+}
+namespace layers {
+
+class IGPUVideoSurfaceManager {
+ protected:
+  virtual ~IGPUVideoSurfaceManager() = default;
+
+ public:
+  NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING
+
+  virtual already_AddRefed<gfx::SourceSurface> Readback(
+      const SurfaceDescriptorGPUVideo& aSD) = 0;
+  virtual void DeallocateSurfaceDescriptor(
+      const SurfaceDescriptorGPUVideo& aSD) = 0;
+};
+
+// Represents an animated Image that is known to the GPU process.
+class GPUVideoImage final : public Image {
+  friend class gl::GLBlitHelper;
+
+ public:
+  GPUVideoImage(IGPUVideoSurfaceManager* aManager,
+                const SurfaceDescriptorGPUVideo& aSD, const gfx::IntSize& aSize,
+                const gfx::ColorDepth& aColorDepth)
+      : Image(nullptr, ImageFormat::GPU_VIDEO),
+        mSize(aSize),
+        mColorDepth(aColorDepth) {
+    // Create the TextureClient immediately since the GPUVideoTextureData
+    // is responsible for deallocating the SurfaceDescriptor.
+    //
+    // Use the RECYCLE texture flag, since it's likely that our 'real'
+    // TextureData (in the decoder thread of the GPU process) is using
+    // it too, and we want to make sure we don't send the delete message
+    // until we've stopped being used on the compositor.
+    mTextureClient = TextureClient::CreateWithData(
+        new GPUVideoTextureData(aManager, aSD, aSize), TextureFlags::RECYCLE,
+        ImageBridgeChild::GetSingleton().get());
+  }
+
+  virtual ~GPUVideoImage() = default;
+
+  gfx::IntSize GetSize() const override { return mSize; }
+
+  gfx::ColorDepth GetColorDepth() const override { return mColorDepth; }
+
+  Maybe<SurfaceDescriptor> GetDesc() override {
+    return GetDescFromTexClient(mTextureClient);
+  }
+
+ private:
+  GPUVideoTextureData* GetData() const {
+    if (!mTextureClient) {
+      return nullptr;
+    }
+    TextureData* data = mTextureClient->GetInternalData();
+    if (!data) {
+      return nullptr;
+    }
+    return data->AsGPUVideoTextureData();
+  }
+
+ public:
+  already_AddRefed<gfx::SourceSurface> GetAsSourceSurface() override {
+    GPUVideoTextureData* data = GetData();
+    if (!data) {
+      return nullptr;
+    }
+    return data->GetAsSourceSurface();
+  }
+
+  TextureClient* GetTextureClient(KnowsCompositor* aKnowsCompositor) override {
+    MOZ_ASSERT(aKnowsCompositor == ImageBridgeChild::GetSingleton(),
+               "Must only use GPUVideo on ImageBridge");
+    return mTextureClient;
+  }
+
+ private:
+  gfx::IntSize mSize;
+  gfx::ColorDepth mColorDepth;
+  RefPtr<TextureClient> mTextureClient;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif  // GFX_GPU_VIDEO_IMAGE_H