cc/resources/clip_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/clip_display_item.h"
   6
   7 #include "third_party/skia/include/core/SkCanvas.h"
   8
   9 namespace cc {
  10
  11 ClipDisplayItem::ClipDisplayItem(gfx::Rect clip_rect,
  12                                  const std::vector<SkRRect>& rounded_clip_rects)
  13     : clip_rect_(clip_rect), rounded_clip_rects_(rounded_clip_rects) {
  14 }
  15
  16 ClipDisplayItem::~ClipDisplayItem() {
  17 }
  18
  19 void ClipDisplayItem::Raster(SkCanvas* canvas,
  20                              SkDrawPictureCallback* callback) const {
  21   canvas->save();
  22   canvas->clipRect(SkRect::MakeXYWH(clip_rect_.x(), clip_rect_.y(),
  23                                     clip_rect_.width(), clip_rect_.height()));
  24   for (size_t i = 0; i < rounded_clip_rects_.size(); ++i) {
  25     if (rounded_clip_rects_[i].isRect()) {
  26       canvas->clipRect(rounded_clip_rects_[i].rect());
  27     } else {
  28       bool antialiased = true;
  29       canvas->clipRRect(rounded_clip_rects_[i], SkRegion::kIntersect_Op,
  30                         antialiased);
  31     }
  32   }
  33 }
  34
  35 bool ClipDisplayItem::IsSuitableForGpuRasterization() const {
  36   return true;
  37 }
  38
  39 int ClipDisplayItem::ApproximateOpCount() const {
  40   return 1;
  41 }
  42
  43 size_t ClipDisplayItem::PictureMemoryUsage() const {
  44   size_t total_size = sizeof(gfx::Rect);
  45   for (size_t i = 0; i < rounded_clip_rects_.size(); ++i) {
  46     total_size += sizeof(rounded_clip_rects_[i]);
  47   }
  48   return total_size;
  49 }
  50
  51 EndClipDisplayItem::EndClipDisplayItem() {
  52 }
  53
  54 EndClipDisplayItem::~EndClipDisplayItem() {
  55 }
  56
  57 void EndClipDisplayItem::Raster(SkCanvas* canvas,
  58                                 SkDrawPictureCallback* callback) const {
  59   canvas->restore();
  60 }
  61
  62 bool EndClipDisplayItem::IsSuitableForGpuRasterization() const {
  63   return true;
  64 }
  65
  66 int EndClipDisplayItem::ApproximateOpCount() const {
  67   return 0;
  68 }
  69
  70 size_t EndClipDisplayItem::PictureMemoryUsage() const {
  71   return 0;
  72 }
  73
  74 }  // namespace cc