1 files changed, 63 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/platform/graphics/mailbox_texture_holder.h b/chromium/third_party/blink/renderer/platform/graphics/mailbox_texture_holder.h
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index 00000000000..58a17c894e7
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+++ b/chromium/third_party/blink/renderer/platform/graphics/mailbox_texture_holder.h
@@ -0,0 +1,63 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_MAILBOX_TEXTURE_HOLDER_H_
+#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_MAILBOX_TEXTURE_HOLDER_H_
+
+#include "base/memory/weak_ptr.h"
+#include "base/single_thread_task_runner.h"
+#include "third_party/blink/renderer/platform/graphics/graphics_types.h"
+#include "third_party/blink/renderer/platform/graphics/texture_holder.h"
+#include "third_party/blink/renderer/platform/graphics/web_graphics_context_3d_provider_wrapper.h"
+#include "third_party/blink/renderer/platform/platform_export.h"
+#include "third_party/khronos/GLES2/gl2.h"
+
+namespace blink {
+
+class PLATFORM_EXPORT MailboxTextureHolder final : public TextureHolder {
+ public:
+  ~MailboxTextureHolder() override;
+
+  bool IsSkiaTextureHolder() final { return false; }
+  bool IsMailboxTextureHolder() final { return true; }
+  IntSize Size() const final { return size_; }
+  bool CurrentFrameKnownToBeOpaque() final { return false; }
+  bool IsValid() const final;
+  bool IsCrossThread() const final;
+
+  const gpu::Mailbox& GetMailbox() const final { return mailbox_; }
+  const gpu::SyncToken& GetSyncToken() const final { return sync_token_; }
+  void UpdateSyncToken(gpu::SyncToken sync_token) final {
+    sync_token_ = sync_token;
+  }
+
+  void Sync(MailboxSyncMode) final;
+  // In WebGL's commit or transferToImageBitmap calls, it will call the
+  // DrawingBuffer::transferToStaticBitmapImage function, which produces the
+  // input parameters for this method.
+  MailboxTextureHolder(const gpu::Mailbox&,
+                       const gpu::SyncToken&,
+                       unsigned texture_id_to_delete_after_mailbox_consumed,
+                       base::WeakPtr<WebGraphicsContext3DProviderWrapper>&&,
+                       IntSize mailbox_size);
+  // This function turns a texture-backed SkImage into a mailbox and a
+  // syncToken.
+  MailboxTextureHolder(std::unique_ptr<TextureHolder>, GLenum filter);
+
+ private:
+  void InitCommon();
+
+  gpu::Mailbox mailbox_;
+  gpu::SyncToken sync_token_;
+  unsigned texture_id_;
+  IntSize size_;
+  bool is_converted_from_skia_texture_;
+  scoped_refptr<base::SingleThreadTaskRunner> texture_thread_task_runner_;
+  PlatformThreadId thread_id_;
+  bool did_issue_ordering_barrier_ = false;
+};
+
+}  // namespace blink
+
+#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_MAILBOX_TEXTURE_HOLDER_H_