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(const gfx::Transform& transform)
  14     : transform_(transform) {
  15 }
  16
  17 TransformDisplayItem::~TransformDisplayItem() {
  18 }
  19
  20 void TransformDisplayItem::Raster(SkCanvas* canvas,
  21                                   SkDrawPictureCallback* callback) const {
  22   canvas->save();
  23   if (!transform_.IsIdentity())
  24     canvas->concat(transform_.matrix());
  25 }
  26
  27 bool TransformDisplayItem::IsSuitableForGpuRasterization() const {
  28   return true;
  29 }
  30
  31 int TransformDisplayItem::ApproximateOpCount() const {
  32   return 1;
  33 }
  34
  35 size_t TransformDisplayItem::PictureMemoryUsage() const {
  36   return sizeof(gfx::Transform);
  37 }
  38
  39 void TransformDisplayItem::AsValueInto(
  40     base::trace_event::TracedValue* array) const {
  41   array->AppendString(base::StringPrintf("TransformDisplayItem transform: [%s]",
  42                                          transform_.ToString().c_str()));
  43 }
  44
  45 EndTransformDisplayItem::EndTransformDisplayItem() {
  46 }
  47
  48 EndTransformDisplayItem::~EndTransformDisplayItem() {
  49 }
  50
  51 void EndTransformDisplayItem::Raster(SkCanvas* canvas,
  52                                      SkDrawPictureCallback* callback) const {
  53   canvas->restore();
  54 }
  55
  56 bool EndTransformDisplayItem::IsSuitableForGpuRasterization() const {
  57   return true;
  58 }
  59
  60 int EndTransformDisplayItem::ApproximateOpCount() const {
  61   return 0;
  62 }
  63
  64 size_t EndTransformDisplayItem::PictureMemoryUsage() const {
  65   return 0;
  66 }
  67
  68 void EndTransformDisplayItem::AsValueInto(
  69     base::trace_event::TracedValue* array) const {
  70   array->AppendString("EndTransformDisplayItem");
  71 }
  72
  73 }  // namespace cc