blob: 78817f9a01fa40e5840a43dd63b06a5c1da66a7a [file] [log] [blame]
// 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 <stdint.h>
#include "base/macros.h"
#include "ui/compositor/compositor_export.h"
namespace ui {
class PaintContext;
// A class to provide scoped compositing filters (eg opacity) of painting to a
// DisplayItemList. The filters provided will be applied to any
// DisplayItems added to the DisplayItemList while this object is alive. In
// other words, any nested PaintRecorders or other such Recorders will
// be filtered by the effect.
class COMPOSITOR_EXPORT CompositingRecorder {
// |alpha| is a value between 0 and 255, where 0 is transparent and 255 is
// opaque. |size_in_context| is the size in the |context|'s space surrounding
// everything that's visible. |lcd_text_requires_opaque_layer| should
// normally be true; if this is false, Skia will respect text rendering
// requests for LCD AA even if they occur on non-opaque layers. This should
// only be used in cases where the text is known to be rendered opaquely on an
// opaque background before compositing.
CompositingRecorder(const PaintContext& context,
uint8_t alpha,
bool lcd_text_requires_opaque_layer);
const PaintContext& context_;
bool saved_;
} // namespace ui