cc/playback/drawing_display_item.cc

   1 // Copyright 2014 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 "cc/playback/drawing_display_item.h"
   6
   7 #include <string>
   8
   9 #include "base/strings/stringprintf.h"
  10 #include "base/trace_event/trace_event_argument.h"
  11 #include "cc/debug/picture_debug_util.h"
  12 #include "third_party/skia/include/core/SkCanvas.h"
  13 #include "third_party/skia/include/core/SkMatrix.h"
  14 #include "third_party/skia/include/core/SkPicture.h"
  15 #include "third_party/skia/include/utils/SkPictureUtils.h"
  16
  17 namespace cc {
  18
  19 DrawingDisplayItem::DrawingDisplayItem() {
  20 }
  21
  22 DrawingDisplayItem::~DrawingDisplayItem() {
  23 }
  24
  25 void DrawingDisplayItem::SetNew(skia::RefPtr<SkPicture> picture) {
  26   picture_ = picture.Pass();
  27   DisplayItem::SetNew(picture_->suitableForGpuRasterization(NULL),
  28                       picture_->approximateOpCount(),
  29                       SkPictureUtils::ApproximateBytesUsed(picture_.get()));
  30 }
  31
  32 void DrawingDisplayItem::Raster(SkCanvas* canvas,
  33                                 SkPicture::AbortCallback* callback) const {
  34   // SkPicture always does a wrapping save/restore on the canvas, so it is not
  35   // necessary here.
  36   if (callback)
  37     picture_->playback(canvas, callback);
  38   else
  39     canvas->drawPicture(picture_.get());
  40 }
  41
  42 void DrawingDisplayItem::AsValueInto(
  43     base::trace_event::TracedValue* array) const {
  44   array->BeginDictionary();
  45   array->SetString("name", "DrawingDisplayItem");
  46   array->SetString(
  47       "cullRect",
  48       base::StringPrintf("[%f,%f,%f,%f]", picture_->cullRect().x(),
  49                          picture_->cullRect().y(), picture_->cullRect().width(),
  50                          picture_->cullRect().height()));
  51   std::string b64_picture;
  52   PictureDebugUtil::SerializeAsBase64(picture_.get(), &b64_picture);
  53   array->SetString("skp64", b64_picture);
  54   array->EndDictionary();
  55 }
  56
  57 void DrawingDisplayItem::CloneTo(DrawingDisplayItem* item) const {
  58   item->SetNew(picture_);
  59 }
  60
  61 }  // namespace cc