cc: Make Picture/PicturePile handle recording/raster

cc/picture.cc

 // Copyright 2012 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 "config.h"
 
+#include "base/debug/trace_event.h"
+#include "cc/content_layer_client.h"
 #include "cc/picture.h"
+#include "cc/rendering_stats.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "ui/gfx/rect_conversions.h"
 
 namespace cc {
 
-Picture::Picture() {
+scoped_refptr<Picture> Picture::Create() {
+  return make_scoped_refptr(new Picture());
+}
+
+Picture::Picture() : picture_(new SkPicture()) {
+}
+
+Picture::Picture(SkPicture* picture, gfx::Rect layer_rect,
+                 gfx::Rect opaque_rect) :
+    layer_rect_(layer_rect),
+    opaque_rect_(opaque_rect),
+    picture_(picture) {
 }
 
 Picture::~Picture() {
 }
 
+scoped_refptr<Picture> Picture::Clone() {
+  // SkPicture is not thread-safe to rasterize with, so return a thread-safe
+  // clone of it.
+  SkPicture* clone = picture_->clone();
+  return make_scoped_refptr(new Picture(clone, layer_rect_, opaque_rect_));
+}
+
+void Picture::Record(ContentLayerClient* painter, gfx::Rect layer_rect,
+                     RenderingStats& stats) {
+  TRACE_EVENT0("cc", "Picture::Record");
+  SkCanvas* canvas = picture_->beginRecording(
+      layer_rect.width(),
+      layer_rect.height(),
+      SkPicture::kOptimizeForClippedPlayback_RecordingFlag);
+
+  canvas->save();
+  canvas->translate(SkFloatToScalar(-layer_rect.x()),
+                    SkFloatToScalar(-layer_rect.y()));
+
+  SkPaint paint;
+  paint.setAntiAlias(false);
+  paint.setXfermodeMode(SkXfermode::kClear_Mode);
+  SkRect layer_skrect = SkRect::MakeXYWH(layer_rect.x(),
+                                         layer_rect.y(),
+                                         layer_rect.width(),
+                                         layer_rect.height());
+  canvas->drawRect(layer_skrect, paint);
+  canvas->clipRect(layer_skrect);
+
+  gfx::RectF opaque_layer_rect;
+  base::TimeTicks beginPaintTime = base::TimeTicks::Now();
+  painter->paintContents(canvas, layer_rect, opaque_layer_rect);
+  double delta = (base::TimeTicks::Now() - beginPaintTime).InSecondsF();
+  stats.totalPaintTimeInSeconds += delta;
+
+  canvas->restore();
+  picture_->endRecording();
+
+  opaque_rect_ = gfx::ToEnclosedRect(opaque_layer_rect);
+  layer_rect_ = layer_rect;
+}
+
+void Picture::Raster(SkCanvas* canvas) {
+  TRACE_EVENT0("cc", "Picture::Raster");
+  canvas->translate(layer_rect_.x(), layer_rect_.y());
+  canvas->save();
+  canvas->drawPicture(*picture_);
+  canvas->restore();
+}
+
 }  // namespace cc