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// Copyright 2016 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#ifndef CORE_FXCODEC_PNG_PNG_DECODER_H_
#define CORE_FXCODEC_PNG_PNG_DECODER_H_
#include <memory>
#include "core/fxcodec/progressive_decoder_iface.h"
#include "core/fxcrt/retain_ptr.h"
#ifndef PDF_ENABLE_XFA_PNG
#error "PNG must be enabled"
#endif
namespace fxcodec {
class CFX_DIBAttribute;
class PngDecoder {
public:
class Delegate {
public:
virtual bool PngReadHeader(int width,
int height,
int bpc,
int pass,
int* color_type,
double* gamma) = 0;
// Returns true on success. |pSrcBuf| will be set if this succeeds.
// |pSrcBuf| does not take ownership of the buffer.
virtual bool PngAskScanlineBuf(int line, uint8_t** pSrcBuf) = 0;
virtual void PngFillScanlineBufCompleted(int pass, int line) = 0;
};
static std::unique_ptr<ProgressiveDecoderIface::Context> StartDecode(
Delegate* pDelegate);
static bool ContinueDecode(ProgressiveDecoderIface::Context* pContext,
RetainPtr<CFX_CodecMemory> codec_memory,
CFX_DIBAttribute* pAttribute);
PngDecoder() = delete;
PngDecoder(const PngDecoder&) = delete;
PngDecoder& operator=(const PngDecoder&) = delete;
};
} // namespace fxcodec
using PngDecoder = fxcodec::PngDecoder;
#endif // CORE_FXCODEC_PNG_PNG_DECODER_H_