cc/resources/transform_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/resources/transform_display_item.h"
   6
   7 #include "base/strings/stringprintf.h"
   8 #include "base/trace_event/trace_event_argument.h"
   9 #include "third_party/skia/include/core/SkCanvas.h"
  10
  11 namespace cc {
  12
  13 TransformDisplayItem::TransformDisplayItem()
  14     : transform_(gfx::Transform::kSkipInitialization) {
  15 }
  16
  17 TransformDisplayItem::~TransformDisplayItem() {
  18 }
  19
  20 void TransformDisplayItem::SetNew(const gfx::Transform& transform) {
  21   transform_ = transform;
  22
  23   size_t memory_usage = sizeof(gfx::Transform);
  24   DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 1 /* op_count */,
  25                       memory_usage);
  26 }
  27
  28 void TransformDisplayItem::Raster(SkCanvas* canvas,
  29                                   SkDrawPictureCallback* callback) const {
  30   canvas->save();
  31   if (!transform_.IsIdentity())
  32     canvas->concat(transform_.matrix());
  33 }
  34
  35 void TransformDisplayItem::AsValueInto(
  36     base::trace_event::TracedValue* array) const {
  37   array->AppendString(base::StringPrintf("TransformDisplayItem transform: [%s]",
  38                                          transform_.ToString().c_str()));
  39 }
  40
  41 EndTransformDisplayItem::EndTransformDisplayItem() {
  42   DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 0 /* op_count */,
  43                       0 /* memory_usage */);
  44 }
  45
  46 EndTransformDisplayItem::~EndTransformDisplayItem() {
  47 }
  48
  49 void EndTransformDisplayItem::Raster(SkCanvas* canvas,
  50                                      SkDrawPictureCallback* callback) const {
  51   canvas->restore();
  52 }
  53
  54 void EndTransformDisplayItem::AsValueInto(
  55     base::trace_event::TracedValue* array) const {
  56   array->AppendString("EndTransformDisplayItem");
  57 }
  58
  59 }  // namespace cc