From f6a5261539900d7fb66c05623e091fad88c8b905 Mon Sep 17 00:00:00 2001
From: "dnicoara@chromium.org"
 <dnicoara@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Wed, 23 Oct 2013 19:19:54 +0000
Subject: SoftwareOutputDevice implementation using an OZONE software renderer
 as the backend.

SOD's expectation is that Ozone provides a SkCanvas as the accelerated widget.

BUG=

Review URL: https://codereview.chromium.org/23862004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230488 0039d316-1c4b-4281-b951-d872f2087c98
---
 .../browser/aura/software_output_device_ozone.cc   | 69 ++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 content/browser/aura/software_output_device_ozone.cc

(limited to 'content/browser/aura/software_output_device_ozone.cc')

diff --git a/content/browser/aura/software_output_device_ozone.cc b/content/browser/aura/software_output_device_ozone.cc
new file mode 100644
index 0000000..c704fed
--- /dev/null
+++ b/content/browser/aura/software_output_device_ozone.cc
@@ -0,0 +1,69 @@
+// Copyright 2013 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.
+
+#include "content/browser/aura/software_output_device_ozone.h"
+#include "third_party/skia/include/core/SkBitmapDevice.h"
+#include "third_party/skia/include/core/SkDevice.h"
+#include "ui/compositor/compositor.h"
+#include "ui/gfx/ozone/surface_factory_ozone.h"
+#include "ui/gfx/skia_util.h"
+
+namespace content {
+
+SoftwareOutputDeviceOzone::SoftwareOutputDeviceOzone(
+    ui::Compositor* compositor) : compositor_(compositor) {
+  if (gfx::SurfaceFactoryOzone::GetInstance()->InitializeHardware() !=
+      gfx::SurfaceFactoryOzone::INITIALIZED)
+    LOG(FATAL) << "Failed to initialize hardware in OZONE";
+}
+
+SoftwareOutputDeviceOzone::~SoftwareOutputDeviceOzone() {
+}
+
+void SoftwareOutputDeviceOzone::Resize(gfx::Size viewport_size) {
+  if (viewport_size_ == viewport_size)
+    return;
+
+  viewport_size_ = viewport_size;
+  gfx::Rect bounds(viewport_size_);
+
+  gfx::SurfaceFactoryOzone* factory = gfx::SurfaceFactoryOzone::GetInstance();
+  factory->AttemptToResizeAcceleratedWidget(compositor_->widget(),
+                                            bounds);
+  gfx::AcceleratedWidget realized_widget = factory->RealizeAcceleratedWidget(
+      compositor_->widget());
+
+  if (realized_widget == gfx::kNullAcceleratedWidget)
+    LOG(FATAL) << "Failed to get a realized AcceleratedWidget";
+
+  canvas_ = skia::SharePtr(factory->GetCanvasForWidget(realized_widget));
+  device_ = skia::SharePtr(canvas_->getDevice());
+}
+
+SkCanvas* SoftwareOutputDeviceOzone::BeginPaint(gfx::Rect damage_rect) {
+  DCHECK(gfx::Rect(viewport_size_).Contains(damage_rect));
+
+  canvas_->clipRect(gfx::RectToSkRect(damage_rect), SkRegion::kReplace_Op);
+  // Save the current state so we can restore once we're done drawing. This is
+  // saved after the clip since we want to keep the clip information after we're
+  // done drawing such that OZONE knows what was updated.
+  canvas_->save();
+
+  return SoftwareOutputDevice::BeginPaint(damage_rect);
+}
+
+void SoftwareOutputDeviceOzone::EndPaint(cc::SoftwareFrameData* frame_data) {
+  SoftwareOutputDevice::EndPaint(frame_data);
+
+  canvas_->restore();
+
+  if (damage_rect_.IsEmpty())
+    return;
+
+  bool scheduled = gfx::SurfaceFactoryOzone::GetInstance()->SchedulePageFlip(
+      compositor_->widget());
+  DCHECK(scheduled) << "Failed to schedule pageflip";
+}
+
+}  // namespace content
-- 
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