cc/picture_pile_impl.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/debug/trace_event.h"
   6 #include "cc/picture_pile_impl.h"
   7 #include "cc/rendering_stats.h"
   8 #include "third_party/skia/include/core/SkCanvas.h"
   9 #include "third_party/skia/include/core/SkSize.h"
  10
  11 namespace cc {
  12
  13 scoped_refptr<PicturePileImpl> PicturePileImpl::Create() {
  14   return make_scoped_refptr(new PicturePileImpl());
  15 }
  16
  17 PicturePileImpl::PicturePileImpl() {
  18 }
  19
  20 PicturePileImpl::~PicturePileImpl() {
  21 }
  22
  23 scoped_refptr<PicturePileImpl> PicturePileImpl::CloneForDrawing() const {
  24   TRACE_EVENT0("cc", "PicturePileImpl::CloneForDrawing");
  25   scoped_refptr<PicturePileImpl> clone = Create();
  26   for (PicturePile::Pile::const_iterator i = pile_.begin();
  27        i != pile_.end(); ++i)
  28     clone->pile_.push_back((*i)->Clone());
  29
  30   return clone;
  31 }
  32
  33 void PicturePileImpl::Raster(SkCanvas* canvas, gfx::Rect rect,
  34                              RenderingStats* stats) {
  35   base::TimeTicks rasterizeBeginTime = base::TimeTicks::Now();
  36
  37   // TODO(enne): do this more efficiently, i.e. top down with Skia clips
  38   canvas->save();
  39   canvas->translate(-rect.x(), -rect.y());
  40   SkRect layer_skrect = SkRect::MakeXYWH(rect.x(), rect.y(),
  41                                          rect.width(), rect.height());
  42   canvas->clipRect(layer_skrect);
  43   for (PicturePile::Pile::const_iterator i = pile_.begin();
  44        i != pile_.end(); ++i) {
  45     if (!(*i)->LayerRect().Intersects(rect))
  46       continue;
  47     (*i)->Raster(canvas);
  48
  49     SkISize deviceSize = canvas->getDeviceSize();
  50     stats->totalPixelsRasterized += deviceSize.width() * deviceSize.height();
  51   }
  52   canvas->restore();
  53
  54   stats->totalRasterizeTimeInSeconds += (base::TimeTicks::Now() -
  55                                          rasterizeBeginTime).InSecondsF();
  56 }
  57
  58 }  // namespace cc