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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_FONT_CPDF_CMAP_H_
#define CORE_FPDFAPI_FONT_CPDF_CMAP_H_
#include <vector>
#include "core/fpdfapi/font/cpdf_cidfont.h"
#include "core/fxcrt/retain_ptr.h"
#include "third_party/base/span.h"
class CPDF_CMapManager;
struct FXCMAP_CMap;
enum CIDCoding : uint8_t {
CIDCODING_UNKNOWN = 0,
CIDCODING_GB,
CIDCODING_BIG5,
CIDCODING_JIS,
CIDCODING_KOREA,
CIDCODING_UCS2,
CIDCODING_CID,
CIDCODING_UTF16,
};
class CPDF_CMap final : public Retainable {
public:
enum CodingScheme : uint8_t {
OneByte,
TwoBytes,
MixedTwoBytes,
MixedFourBytes
};
struct CodeRange {
size_t m_CharSize;
uint8_t m_Lower[4];
uint8_t m_Upper[4];
};
struct CIDRange {
uint32_t m_StartCode;
uint32_t m_EndCode;
uint16_t m_StartCID;
};
template <typename T, typename... Args>
friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
void LoadPredefined(CPDF_CMapManager* pMgr, const ByteString& name);
void LoadEmbedded(pdfium::span<const uint8_t> data);
bool IsLoaded() const { return m_bLoaded; }
bool IsVertWriting() const { return m_bVertical; }
uint16_t CIDFromCharCode(uint32_t charcode) const;
int GetCharSize(uint32_t charcode) const;
uint32_t GetNextChar(const ByteStringView& pString, size_t* pOffset) const;
size_t CountChar(const ByteStringView& pString) const;
int AppendChar(char* str, uint32_t charcode) const;
void SetVertical(bool vert) { m_bVertical = vert; }
void SetCodingScheme(CodingScheme scheme) { m_CodingScheme = scheme; }
void SetMixedFourByteLeadingRanges(std::vector<CodeRange> range) {
m_MixedFourByteLeadingRanges = range;
}
int GetCoding() const { return m_Coding; }
const FXCMAP_CMap* GetEmbedMap() const { return m_pEmbedMap.Get(); }
CIDSet GetCharset() const { return m_Charset; }
void SetCharset(CIDSet set) { m_Charset = set; }
void SetDirectCharcodeToCIDTable(size_t idx, uint16_t val) {
m_DirectCharcodeToCIDTable[idx] = val;
}
bool IsDirectCharcodeToCIDTableIsEmpty() const {
return m_DirectCharcodeToCIDTable.empty();
}
private:
CPDF_CMap();
~CPDF_CMap() override;
ByteString m_PredefinedCMap;
bool m_bLoaded;
bool m_bVertical;
CIDSet m_Charset;
CodingScheme m_CodingScheme;
int m_Coding;
std::vector<bool> m_MixedTwoByteLeadingBytes;
std::vector<CodeRange> m_MixedFourByteLeadingRanges;
std::vector<uint16_t> m_DirectCharcodeToCIDTable;
std::vector<CIDRange> m_AdditionalCharcodeToCIDMappings;
UnownedPtr<const FXCMAP_CMap> m_pEmbedMap;
};
#endif // CORE_FPDFAPI_FONT_CPDF_CMAP_H_
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