Initial checkin of the new Mozart compositor.

services/gfx/compositor/render/render_image.h

Index: services/gfx/compositor/render/render_image.h
diff --git a/services/gfx/compositor/render/render_image.h b/services/gfx/compositor/render/render_image.h
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+// Copyright 2015 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 SERVICES_GFX_COMPOSITOR_RENDER_RENDER_IMAGE_H_
+#define SERVICES_GFX_COMPOSITOR_RENDER_RENDER_IMAGE_H_
+
+#include <memory>
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2extmojo.h>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/task_runner.h"
+#include "skia/ext/refptr.h"
+#include "third_party/skia/include/core/SkImage.h"
+
+namespace compositor {
+
+// Describes an image which can be rendered by the compositor.
+//
+// Render objects are thread-safe, immutable, and reference counted via
+// std::shared_ptr.  They have no direct references to the scene graph.
+//
+// TODO(jeffbrown): Generalize this beyond mailbox textures.
+class RenderImage {
+  class Releaser;
+  class Generator;
+
+ public:
+  RenderImage(const skia::RefPtr<SkImage>& image,
+              const std::shared_ptr<Releaser>& releaser);
+  ~RenderImage();
+
+  // Creates a new image backed by a mailbox texture.
+  // If |sync_point| is non-zero, inserts a sync point into the command stream
+  // before the image is first drawn.
+  // When the last reference is released, the associated release task is
+  // posted to the task runner.  Returns nullptr if the mailbox texture
+  // is invalid.
+  static std::shared_ptr<RenderImage> CreateFromMailboxTexture(
+      const GLbyte mailbox_name[GL_MAILBOX_SIZE_CHROMIUM],
+      GLuint sync_point,
+      uint32_t width,
+      uint32_t height,
+      const scoped_refptr<base::TaskRunner>& task_runner,
+      const base::Closure& release_task);
+
+  uint32_t width() const { return image_->width(); }
+  uint32_t height() const { return image_->height(); }
+
+  // Gets the underlying image to rasterize.
+  const skia::RefPtr<SkImage>& image() const { return image_; }
+
+ private:
+  skia::RefPtr<SkImage> image_;
+  std::shared_ptr<Releaser> releaser_;
+
+  DISALLOW_COPY_AND_ASSIGN(RenderImage);
+};
+
+}  // namespace compositor
+
+#endif  // SERVICES_GFX_COMPOSITOR_RENDER_RENDER_IMAGE_H_