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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/compositing_recorder.h"
#include "cc/resources/compositing_display_item.h"
#include "cc/resources/display_item_list.h"
#include "ui/compositor/paint_context.h"
#include "ui/gfx/canvas.h"
namespace ui {
CompositingRecorder::CompositingRecorder(const PaintContext& context,
uint8_t alpha)
: context_(context), saved_(alpha < 255) {
if (!saved_)
return;
if (context_.canvas_) {
context_.canvas_->SaveLayerAlpha(alpha);
} else {
context_.list_->AppendItem(cc::CompositingDisplayItem::Create(
alpha, SkXfermode::kSrcOver_Mode, nullptr /* no bounds */,
skia::RefPtr<SkColorFilter>()));
}
}
CompositingRecorder::~CompositingRecorder() {
if (!saved_)
return;
if (context_.canvas_) {
context_.canvas_->Restore();
} else {
context_.list_->AppendItem(cc::EndCompositingDisplayItem::Create());
}
}
} // namespace ui
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