ui/compositor/clip_transform_recorder.cc

   1 // Copyright 2015 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 "ui/compositor/clip_transform_recorder.h"
   6
   7 #include "cc/resources/clip_display_item.h"
   8 #include "cc/resources/clip_path_display_item.h"
   9 #include "cc/resources/display_item_list.h"
  10 #include "cc/resources/transform_display_item.h"
  11 #include "ui/compositor/paint_context.h"
  12 #include "ui/gfx/canvas.h"
  13 #include "ui/gfx/path.h"
  14
  15 namespace ui {
  16
  17 ClipTransformRecorder::ClipTransformRecorder(const PaintContext& context)
  18     : context_(context) {
  19   if (context_.canvas_)
  20     context_.canvas_->Save();
  21 }
  22
  23 ClipTransformRecorder::~ClipTransformRecorder() {
  24   if (context_.canvas_)
  25     context_.canvas_->Restore();
  26   for (auto it = closers_.rbegin(); it != closers_.rend(); ++it)
  27     context_.list_->AppendItem(make_scoped_ptr(*it));
  28 }
  29
  30 void ClipTransformRecorder::ClipRect(const gfx::Rect& clip_rect) {
  31   if (context_.list_) {
  32     context_.list_->AppendItem(
  33         cc::ClipDisplayItem::Create(clip_rect, std::vector<SkRRect>()));
  34     closers_.push_back(cc::EndClipDisplayItem::Create().release());
  35   } else {
  36     context_.canvas_->ClipRect(clip_rect);
  37   }
  38 }
  39
  40 void ClipTransformRecorder::ClipPath(const gfx::Path& clip_path) {
  41   bool anti_alias = false;
  42   if (context_.list_) {
  43     context_.list_->AppendItem(cc::ClipPathDisplayItem::Create(
  44         clip_path, SkRegion::kIntersect_Op, anti_alias));
  45     closers_.push_back(cc::EndClipPathDisplayItem::Create().release());
  46   } else {
  47     context_.canvas_->ClipPath(clip_path, anti_alias);
  48   }
  49 }
  50
  51 void ClipTransformRecorder::ClipPathWithAntiAliasing(
  52     const gfx::Path& clip_path) {
  53   bool anti_alias = true;
  54   if (context_.list_) {
  55     context_.list_->AppendItem(cc::ClipPathDisplayItem::Create(
  56         clip_path, SkRegion::kIntersect_Op, anti_alias));
  57     closers_.push_back(cc::EndClipPathDisplayItem::Create().release());
  58   } else {
  59     context_.canvas_->ClipPath(clip_path, anti_alias);
  60   }
  61 }
  62
  63 void ClipTransformRecorder::Transform(const gfx::Transform& transform) {
  64   if (context_.list_) {
  65     context_.list_->AppendItem(cc::TransformDisplayItem::Create(transform));
  66     closers_.push_back(cc::EndTransformDisplayItem::Create().release());
  67   } else {
  68     context_.canvas_->Transform(transform);
  69   }
  70 }
  71
  72 }  // namespace ui