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// Copyright 2014 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_FXGE_FX_FONT_H_
#define CORE_FXGE_FX_FONT_H_
#include <memory>
#include <utility>
#include <vector>
#include "core/fxcrt/fx_system.h"
#include "core/fxcrt/unowned_ptr.h"
#include "core/fxge/cfx_substfont.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_dib.h"
#include "core/fxge/fx_freetype.h"
class CFX_FaceCache;
class CFX_GlyphBitmap;
class CFX_PathData;
class IFX_SeekableReadStream;
#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
class SkTypeface;
using CFX_TypeFace = SkTypeface;
#endif
/* Font pitch and family flags */
#define FXFONT_FF_FIXEDPITCH 1
#define FXFONT_FF_ROMAN (1 << 4)
#define FXFONT_FF_SCRIPT (4 << 4)
/* Typical weight values */
#define FXFONT_FW_NORMAL 400
#define FXFONT_FW_BOLD 700
/* Font styles as defined in PDF 1.7 Table 5.20 */
#define FXFONT_FIXED_PITCH (1 << 0)
#define FXFONT_SERIF (1 << 1)
#define FXFONT_SYMBOLIC (1 << 2)
#define FXFONT_SCRIPT (1 << 3)
#define FXFONT_NONSYMBOLIC (1 << 5)
#define FXFONT_ITALIC (1 << 6)
#define FXFONT_ALLCAP (1 << 16)
#define FXFONT_SMALLCAP (1 << 17)
#define FXFONT_BOLD (1 << 18)
/* Other font flags */
#define FXFONT_USEEXTERNATTR 0x80000
#define FXFONT_CIDFONT 0x100000
#ifdef PDF_ENABLE_XFA
#define FXFONT_EXACTMATCH 0x80000000
#endif // PDF_ENABLE_XFA
#define CHARSET_FLAG_ANSI 1
#define CHARSET_FLAG_SYMBOL 2
#define CHARSET_FLAG_SHIFTJIS 4
#define CHARSET_FLAG_BIG5 8
#define CHARSET_FLAG_GB 16
#define CHARSET_FLAG_KOREAN 32
#define GET_TT_SHORT(w) (uint16_t)(((w)[0] << 8) | (w)[1])
#define GET_TT_LONG(w) \
(uint32_t)(((w)[0] << 24) | ((w)[1] << 16) | ((w)[2] << 8) | (w)[3])
// Sets the given transform on the font, and resets it to the identity when it
// goes out of scope.
class ScopedFontTransform {
public:
ScopedFontTransform(FT_Face face, FXFT_Matrix* matrix);
~ScopedFontTransform();
private:
FT_Face m_Face;
};
class CFX_Font {
public:
CFX_Font();
~CFX_Font();
void LoadSubst(const ByteString& face_name,
bool bTrueType,
uint32_t flags,
int weight,
int italic_angle,
int CharsetCP,
bool bVertical);
bool LoadEmbedded(const uint8_t* data, uint32_t size);
FXFT_Face GetFace() const { return m_Face; }
CFX_SubstFont* GetSubstFont() const { return m_pSubstFont.get(); }
#ifdef PDF_ENABLE_XFA
bool LoadFile(const RetainPtr<IFX_SeekableReadStream>& pFile, int nFaceIndex);
bool LoadClone(const CFX_Font* pFont);
void SetFace(FXFT_Face face);
void SetSubstFont(std::unique_ptr<CFX_SubstFont> subst) {
m_pSubstFont = std::move(subst);
}
#endif // PDF_ENABLE_XFA
const CFX_GlyphBitmap* LoadGlyphBitmap(uint32_t glyph_index,
bool bFontStyle,
const CFX_Matrix* pMatrix,
int dest_width,
int anti_alias,
int& text_flags) const;
const CFX_PathData* LoadGlyphPath(uint32_t glyph_index, int dest_width) const;
#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
CFX_TypeFace* GetDeviceCache() const;
#endif
int GetGlyphWidth(uint32_t glyph_index);
int GetAscent() const;
int GetDescent() const;
bool GetGlyphBBox(uint32_t glyph_index, FX_RECT& bbox);
bool IsItalic() const;
bool IsBold() const;
bool IsFixedWidth() const;
bool IsVertical() const { return m_bVertical; }
ByteString GetPsName() const;
ByteString GetFamilyName() const;
ByteString GetFaceName() const;
bool IsTTFont() const;
bool GetBBox(FX_RECT& bbox);
bool IsEmbedded() const { return m_bEmbedded; }
uint8_t* GetSubData() const { return m_pGsubData; }
void SetSubData(uint8_t* data) { m_pGsubData = data; }
#if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
void* GetPlatformFont() const { return m_pPlatformFont; }
void SetPlatformFont(void* font) { m_pPlatformFont = font; }
#endif
uint8_t* GetFontData() const { return m_pFontData; }
uint32_t GetSize() const { return m_dwSize; }
void AdjustMMParams(int glyph_index, int width, int weight) const;
static const size_t kAngleSkewArraySize = 30;
static const char s_AngleSkew[kAngleSkewArraySize];
static const size_t kWeightPowArraySize = 100;
static const uint8_t s_WeightPow[kWeightPowArraySize];
static const uint8_t s_WeightPow_11[kWeightPowArraySize];
static const uint8_t s_WeightPow_SHIFTJIS[kWeightPowArraySize];
#ifdef PDF_ENABLE_XFA
protected:
bool m_bShallowCopy;
FXFT_StreamRec* m_pOwnedStream;
#endif // PDF_ENABLE_XFA
private:
friend class CFX_FaceCache;
CFX_PathData* LoadGlyphPathImpl(uint32_t glyph_index, int dest_width) const;
CFX_FaceCache* GetFaceCache() const;
void ReleasePlatformResource();
void DeleteFace();
void ClearFaceCache();
FXFT_Face m_Face;
mutable UnownedPtr<CFX_FaceCache> m_FaceCache;
std::unique_ptr<CFX_SubstFont> m_pSubstFont;
std::vector<uint8_t> m_pFontDataAllocation;
uint8_t* m_pFontData;
uint8_t* m_pGsubData;
uint32_t m_dwSize;
#if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
void* m_pPlatformFont;
#endif
bool m_bEmbedded;
bool m_bVertical;
};
class CFX_FontFaceInfo {
public:
CFX_FontFaceInfo(ByteString filePath,
ByteString faceName,
ByteString fontTables,
uint32_t fontOffset,
uint32_t fileSize);
const ByteString m_FilePath;
const ByteString m_FaceName;
const ByteString m_FontTables;
const uint32_t m_FontOffset;
const uint32_t m_FileSize;
uint32_t m_Styles;
uint32_t m_Charsets;
};
class CFX_GlyphBitmap {
public:
CFX_GlyphBitmap();
~CFX_GlyphBitmap();
int m_Top;
int m_Left;
RetainPtr<CFX_DIBitmap> m_pBitmap;
};
inline CFX_GlyphBitmap::CFX_GlyphBitmap()
: m_pBitmap(pdfium::MakeRetain<CFX_DIBitmap>()) {}
inline CFX_GlyphBitmap::~CFX_GlyphBitmap() {}
class FXTEXT_GLYPHPOS {
public:
FXTEXT_GLYPHPOS();
FXTEXT_GLYPHPOS(const FXTEXT_GLYPHPOS&);
~FXTEXT_GLYPHPOS();
const CFX_GlyphBitmap* m_pGlyph;
CFX_Point m_Origin;
CFX_PointF m_fOrigin;
};
FX_RECT FXGE_GetGlyphsBBox(const std::vector<FXTEXT_GLYPHPOS>& glyphs,
int anti_alias,
float retinaScaleX,
float retinaScaleY);
ByteString GetNameFromTT(const uint8_t* name_table,
uint32_t name_table_size,
uint32_t name);
int PDF_GetStandardFontName(ByteString* name);
#endif // CORE_FXGE_FX_FONT_H_
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