Initial checkin of the new Mozart compositor.

services/gfx/compositor/render/render_image.cc

+// 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 GL_GLEXT_PROTOTYPES
+#define GL_GLEXT_PROTOTYPES
+#endif
+
+#include "services/gfx/compositor/render/render_image.h"
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/logging.h"
+#include "mojo/skia/ganesh_helpers.h"
+#include "third_party/skia/include/core/SkImage.h"
+
+namespace compositor {
+
+static void DeleteTexture(GLuint texture_id) {
+  glDeleteTextures(1, &texture_id);
+}
+
+RenderImage::RenderImage(const uint8_t mailbox_name[GL_MAILBOX_SIZE_CHROMIUM],
+                         uint32_t sync_point,
+                         uint32_t width,
+                         uint32_t height,
+                         const scoped_refptr<base::TaskRunner>& task_runner,
+                         const base::Closure& release_task)
+    : sync_point_(sync_point),
+      width_(width),
+      height_(height),
+      task_runner_(task_runner),
+      release_task_(release_task) {
+  DCHECK(mailbox_name);
+  DCHECK(width_);
+  DCHECK(height_);
+  DCHECK(task_runner_);
+  memcpy(mailbox_name_, mailbox_name, GL_MAILBOX_SIZE_CHROMIUM);
+}
+
+RenderImage::~RenderImage() {
+  task_runner_->PostTask(FROM_HERE, release_task_);
+}
+
+// Creates a Skia image for this rendr image.
+// Automatically inserts a sync point into the GL command stream.
+skia::RefPtr<SkImage> RenderImage::CreateSkImage(
+    const PaintingScope& painting_scope) const {
+  if (sync_point_)
+    glWaitSyncPointCHROMIUM(sync_point_);
+
+  GLuint texture_id =
+      glCreateAndConsumeTextureCHROMIUM(GL_TEXTURE_2D, mailbox_name_);
+  if (!texture_id)
+    return skia::RefPtr<SkImage>();
+
+  return mojo::skia::CreateImageFromTexture(
+      painting_scope.ganesh_scope(), texture_id, width_, height_,
+      base::Bind(&DeleteTexture, texture_id));
+}
+
+}  // namespace compositor