blob: 53b4b384ce1f52f964eed7ee35f302f535eb0329 [file] [log] [blame]
// Copyright 2017 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 "base/containers/stack_container.h"
#include "cc/paint/decode_stashing_image_provider.h"
#include "cc/paint/paint_export.h"
#include "cc/paint/paint_flags.h"
namespace cc {
// A helper class to modify the flags for raster. This includes alpha folding
// from SaveLayers and decoding images.
class CC_PAINT_EXPORT ScopedRasterFlags {
// |flags| and |image_provider| must outlive this class.
ScopedRasterFlags(const PaintFlags* flags,
ImageProvider* image_provider,
const SkMatrix& ctm,
uint8_t alpha);
ScopedRasterFlags(const ScopedRasterFlags&) = delete;
ScopedRasterFlags& operator=(const ScopedRasterFlags&) = delete;
// The usage of these flags should not extend beyond the lifetime of this
// object.
const PaintFlags* flags() const {
if (decode_failed_)
return nullptr;
return modified_flags_ ? &*modified_flags_ : original_flags_;
void DecodeImageShader(const SkMatrix& ctm);
void DecodeRecordShader(const SkMatrix& ctm);
void DecodeFilter();
void AdjustStrokeIfNeeded(const SkMatrix& ctm);
PaintFlags* MutableFlags() {
if (!modified_flags_)
return &*modified_flags_;
const PaintFlags* original_flags_;
base::Optional<PaintFlags> modified_flags_;
base::Optional<DecodeStashingImageProvider> decode_stashing_image_provider_;
bool decode_failed_ = false;
} // namespace cc