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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/compositor/clip_recorder.h"
#include "cc/playback/clip_display_item.h"
#include "cc/playback/clip_path_display_item.h"
#include "cc/playback/display_item_list.h"
#include "ui/compositor/paint_context.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/path.h"
namespace ui {
ClipRecorder::ClipRecorder(const PaintContext& context,
const gfx::Size& size_in_layer)
: context_(context),
bounds_in_layer_(context.ToLayerSpaceBounds(size_in_layer)),
num_closers_(0) {}
ClipRecorder::~ClipRecorder() {
for (size_t i = num_closers_; i > 0; --i) {
switch (closers_[i - 1]) {
case CLIP_RECT:
context_.list_->CreateAndAppendItem<cc::EndClipDisplayItem>(
bounds_in_layer_);
break;
case CLIP_PATH:
context_.list_->CreateAndAppendItem<cc::EndClipPathDisplayItem>(
bounds_in_layer_);
break;
}
}
}
void ClipRecorder::ClipRect(const gfx::Rect& clip_rect) {
gfx::Rect clip_in_layer_space = context_.ToLayerSpaceRect(clip_rect);
auto* item = context_.list_->CreateAndAppendItem<cc::ClipDisplayItem>(
clip_in_layer_space);
item->SetNew(clip_rect, std::vector<SkRRect>());
DCHECK_LT(num_closers_, arraysize(closers_));
closers_[num_closers_++] = CLIP_RECT;
}
void ClipRecorder::ClipPath(const gfx::Path& clip_path) {
bool anti_alias = false;
// As a further optimization, consider passing a more granular visual rect.
auto* item = context_.list_->CreateAndAppendItem<cc::ClipPathDisplayItem>(
bounds_in_layer_);
item->SetNew(clip_path, SkRegion::kIntersect_Op, anti_alias);
DCHECK_LT(num_closers_, arraysize(closers_));
closers_[num_closers_++] = CLIP_PATH;
}
void ClipRecorder::ClipPathWithAntiAliasing(
const gfx::Path& clip_path) {
bool anti_alias = true;
// As a further optimization, consider passing a more granular visual rect.
auto* item = context_.list_->CreateAndAppendItem<cc::ClipPathDisplayItem>(
bounds_in_layer_);
item->SetNew(clip_path, SkRegion::kIntersect_Op, anti_alias);
DCHECK_LT(num_closers_, arraysize(closers_));
closers_[num_closers_++] = CLIP_PATH;
}
} // namespace ui
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