blob: 06045f8055b1377ecd20597d1488ad3a0b236268 [file] [log] [blame]
// Copyright 2021 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_LOADER_IMAGE_FAILURE_IMAGE_DECODER_H_
#define COBALT_LOADER_IMAGE_FAILURE_IMAGE_DECODER_H_
#include <memory>
#include <string>
#include "base/compiler_specific.h"
#include "cobalt/loader/image/image.h"
#include "cobalt/loader/image/image_data_decoder.h"
namespace cobalt {
namespace loader {
namespace image {
// This class always signals a decoding error rather than decoding. It can
// be used for imitating the normal image decoders without doing any
// decoding works.
class FailureImageDecoder : public ImageDataDecoder {
public:
explicit FailureImageDecoder(render_tree::ResourceProvider* resource_provider,
const base::DebuggerHooks& debugger_hooks)
: ImageDataDecoder(resource_provider, debugger_hooks) {}
// From ImageDataDecoder
std::string GetTypeString() const override { return "FailureImageDecoder"; }
private:
// From ImageDataDecoder
size_t DecodeChunkInternal(const uint8* data, size_t input_byte) override {
set_state(kError);
return input_byte;
}
scoped_refptr<Image> FinishInternal() override {
// Indicate the failure of decoding works.
return nullptr;
}
};
} // namespace image
} // namespace loader
} // namespace cobalt
#endif // COBALT_LOADER_IMAGE_FAILURE_IMAGE_DECODER_H_