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 <string>
   8
   9 #include "base/strings/stringprintf.h"
  10 #include "base/trace_event/trace_event_argument.h"
  11 #include "third_party/skia/include/core/SkCanvas.h"
  12 #include "ui/gfx/skia_util.h"
  13
  14 namespace cc {
  15
  16 ClipDisplayItem::ClipDisplayItem() {
  17 }
  18
  19 ClipDisplayItem::~ClipDisplayItem() {
  20 }
  21
  22 void ClipDisplayItem::SetNew(gfx::Rect clip_rect,
  23                              const std::vector<SkRRect>& rounded_clip_rects) {
  24   clip_rect_ = clip_rect;
  25   rounded_clip_rects_ = rounded_clip_rects;
  26
  27   size_t memory_usage = sizeof(gfx::Rect);
  28   for (size_t i = 0; i < rounded_clip_rects_.size(); ++i) {
  29     memory_usage += sizeof(rounded_clip_rects_[i]);
  30   }
  31   DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 1 /* op_count */,
  32                       memory_usage);
  33 }
  34
  35 void ClipDisplayItem::Raster(SkCanvas* canvas,
  36                              SkDrawPictureCallback* callback) const {
  37   canvas->save();
  38   canvas->clipRect(SkRect::MakeXYWH(clip_rect_.x(), clip_rect_.y(),
  39                                     clip_rect_.width(), clip_rect_.height()));
  40   for (size_t i = 0; i < rounded_clip_rects_.size(); ++i) {
  41     if (rounded_clip_rects_[i].isRect()) {
  42       canvas->clipRect(rounded_clip_rects_[i].rect());
  43     } else {
  44       bool antialiased = true;
  45       canvas->clipRRect(rounded_clip_rects_[i], SkRegion::kIntersect_Op,
  46                         antialiased);
  47     }
  48   }
  49 }
  50
  51 void ClipDisplayItem::AsValueInto(base::trace_event::TracedValue* array) const {
  52   std::string value = base::StringPrintf("ClipDisplayItem rect: [%s]",
  53                                          clip_rect_.ToString().c_str());
  54   for (const SkRRect& rounded_rect : rounded_clip_rects_) {
  55     base::StringAppendF(
  56         &value, " rounded_rect: [rect: [%s]",
  57         gfx::SkRectToRectF(rounded_rect.rect()).ToString().c_str());
  58     base::StringAppendF(&value, " radii: [");
  59     SkVector upper_left_radius = rounded_rect.radii(SkRRect::kUpperLeft_Corner);
  60     base::StringAppendF(&value, "[%f,%f],", upper_left_radius.x(),
  61                         upper_left_radius.y());
  62     SkVector upper_right_radius =
  63         rounded_rect.radii(SkRRect::kUpperRight_Corner);
  64     base::StringAppendF(&value, " [%f,%f],", upper_right_radius.x(),
  65                         upper_right_radius.y());
  66     SkVector lower_right_radius =
  67         rounded_rect.radii(SkRRect::kLowerRight_Corner);
  68     base::StringAppendF(&value, " [%f,%f],", lower_right_radius.x(),
  69                         lower_right_radius.y());
  70     SkVector lower_left_radius = rounded_rect.radii(SkRRect::kLowerLeft_Corner);
  71     base::StringAppendF(&value, " [%f,%f]]", lower_left_radius.x(),
  72                         lower_left_radius.y());
  73   }
  74   array->AppendString(value);
  75 }
  76
  77 EndClipDisplayItem::EndClipDisplayItem() {
  78   DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 0 /* op_count */,
  79                       0 /* memory_usage */);
  80 }
  81
  82 EndClipDisplayItem::~EndClipDisplayItem() {
  83 }
  84
  85 void EndClipDisplayItem::Raster(SkCanvas* canvas,
  86                                 SkDrawPictureCallback* callback) const {
  87   canvas->restore();
  88 }
  89
  90 void EndClipDisplayItem::AsValueInto(
  91     base::trace_event::TracedValue* array) const {
  92   array->AppendString("EndClipDisplayItem");
  93 }
  94
  95 }  // namespace cc