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// Copyright 2017 PDFium Authors. All rights reserved.
// 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_FPDFAPI_PAGE_CPDF_DIB_H_
#define CORE_FPDFAPI_PAGE_CPDF_DIB_H_
#include <memory>
#include <vector>
#include "core/fpdfapi/page/cpdf_colorspace.h"
#include "core/fxcrt/fx_memory_wrappers.h"
#include "core/fxcrt/retain_ptr.h"
#include "core/fxcrt/unowned_ptr.h"
#include "core/fxge/dib/cfx_dibbase.h"
#include "third_party/base/span.h"
class CPDF_Dictionary;
class CPDF_Document;
class CPDF_Stream;
class CPDF_StreamAcc;
struct DIB_COMP_DATA {
float m_DecodeMin;
float m_DecodeStep;
int m_ColorKeyMin;
int m_ColorKeyMax;
};
namespace fxcodec {
class Jbig2Context;
class ScanlineDecoder;
} // namespace fxcodec
constexpr size_t kHugeImageSize = 60000000;
class CPDF_DIB final : public CFX_DIBBase {
public:
enum class LoadState : uint8_t { kFail, kSuccess, kContinue };
CONSTRUCT_VIA_MAKE_RETAIN;
bool Load(CPDF_Document* pDoc, const CPDF_Stream* pStream);
// CFX_DIBBase:
bool SkipToScanline(int line, PauseIndicatorIface* pPause) const override;
uint8_t* GetBuffer() const override;
const uint8_t* GetScanline(int line) const override;
RetainPtr<CPDF_ColorSpace> GetColorSpace() const { return m_pColorSpace; }
uint32_t GetMatteColor() const { return m_MatteColor; }
LoadState StartLoadDIBBase(CPDF_Document* pDoc,
const CPDF_Stream* pStream,
bool bHasMask,
const CPDF_Dictionary* pFormResources,
const CPDF_Dictionary* pPageResources,
bool bStdCS,
CPDF_ColorSpace::Family GroupFamily,
bool bLoadMask);
LoadState ContinueLoadDIBBase(PauseIndicatorIface* pPause);
RetainPtr<CPDF_DIB> DetachMask();
bool IsJBigImage() const;
private:
CPDF_DIB();
~CPDF_DIB() override;
struct JpxSMaskInlineData {
JpxSMaskInlineData();
~JpxSMaskInlineData();
int width;
int height;
std::vector<uint8_t, FxAllocAllocator<uint8_t>> data;
};
LoadState StartLoadMask();
LoadState StartLoadMaskDIB(RetainPtr<const CPDF_Stream> mask);
bool ContinueToLoadMask();
LoadState ContinueLoadMaskDIB(PauseIndicatorIface* pPause);
bool LoadColorInfo(const CPDF_Dictionary* pFormResources,
const CPDF_Dictionary* pPageResources);
bool GetDecodeAndMaskArray(bool* bDefaultDecode, bool* bColorKey);
RetainPtr<CFX_DIBitmap> LoadJpxBitmap();
void LoadPalette();
LoadState CreateDecoder();
bool CreateDCTDecoder(pdfium::span<const uint8_t> src_span,
const CPDF_Dictionary* pParams);
void TranslateScanline24bpp(uint8_t* dest_scan,
const uint8_t* src_scan) const;
bool TranslateScanline24bppDefaultDecode(uint8_t* dest_scan,
const uint8_t* src_scan) const;
void ValidateDictParam(const ByteString& filter);
bool TransMask() const;
void SetMaskProperties();
uint32_t Get1BitSetValue() const;
uint32_t Get1BitResetValue() const;
UnownedPtr<CPDF_Document> m_pDocument;
RetainPtr<const CPDF_Stream> m_pStream;
RetainPtr<const CPDF_Dictionary> m_pDict;
RetainPtr<CPDF_StreamAcc> m_pStreamAcc;
RetainPtr<CPDF_ColorSpace> m_pColorSpace;
uint32_t m_bpc = 0;
uint32_t m_bpc_orig = 0;
uint32_t m_nComponents = 0;
CPDF_ColorSpace::Family m_Family = CPDF_ColorSpace::Family::kUnknown;
CPDF_ColorSpace::Family m_GroupFamily = CPDF_ColorSpace::Family::kUnknown;
uint32_t m_MatteColor = 0;
LoadState m_Status = LoadState::kFail;
bool m_bLoadMask = false;
bool m_bDefaultDecode = true;
bool m_bImageMask = false;
bool m_bDoBpcCheck = true;
bool m_bColorKey = false;
bool m_bHasMask = false;
bool m_bStdCS = false;
std::vector<DIB_COMP_DATA> m_CompData;
std::unique_ptr<uint8_t, FxFreeDeleter> m_pLineBuf;
std::unique_ptr<uint8_t, FxFreeDeleter> m_pMaskedLine;
RetainPtr<CFX_DIBitmap> m_pCachedBitmap;
// Note: Must not create a cycle between CPDF_DIB instances.
RetainPtr<CPDF_DIB> m_pMask;
RetainPtr<CPDF_StreamAcc> m_pGlobalAcc;
std::unique_ptr<fxcodec::ScanlineDecoder> m_pDecoder;
JpxSMaskInlineData m_JpxInlineData;
// Must come after |m_pCachedBitmap|.
std::unique_ptr<fxcodec::Jbig2Context> m_pJbig2Context;
};
#endif // CORE_FPDFAPI_PAGE_CPDF_DIB_H_