diff options
Diffstat (limited to 'core/fxge/android/cfpf_skiafontmgr.cpp')
| -rw-r--r-- | core/fxge/android/cfpf_skiafontmgr.cpp | 480 |
1 files changed, 480 insertions, 0 deletions
diff --git a/core/fxge/android/cfpf_skiafontmgr.cpp b/core/fxge/android/cfpf_skiafontmgr.cpp new file mode 100644 index 0000000000..290551bedf --- /dev/null +++ b/core/fxge/android/cfpf_skiafontmgr.cpp @@ -0,0 +1,480 @@ +// 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 + +#include "core/fxcrt/fx_system.h" + +#define FPF_SKIAMATCHWEIGHT_NAME1 62 +#define FPF_SKIAMATCHWEIGHT_NAME2 60 +#define FPF_SKIAMATCHWEIGHT_1 16 +#define FPF_SKIAMATCHWEIGHT_2 8 + +#include <algorithm> + +#include "core/fxcrt/fx_ext.h" +#include "core/fxcrt/fx_memory.h" +#include "core/fxge/android/fpf_skiafont.h" +#include "core/fxge/android/fpf_skiafontmgr.h" +#include "core/fxge/fx_freetype.h" + +#ifdef __cplusplus +extern "C" { +#endif +static unsigned long FPF_SkiaStream_Read(FXFT_Stream stream, + unsigned long offset, + unsigned char* buffer, + unsigned long count) { + IFX_FileRead* pFileRead = (IFX_FileRead*)stream->descriptor.pointer; + if (!pFileRead) + return 0; + if (count > 0) { + if (!pFileRead->ReadBlock(buffer, (FX_FILESIZE)offset, (size_t)count)) + return 0; + } + return count; +} + +static void FPF_SkiaStream_Close(FXFT_Stream stream) {} +#ifdef __cplusplus +}; +#endif + +namespace { + +struct FPF_SKIAFONTMAP { + uint32_t dwFamily; + uint32_t dwSubSt; +}; + +const FPF_SKIAFONTMAP g_SkiaFontmap[] = { + {0x58c5083, 0xc8d2e345}, {0x5dfade2, 0xe1633081}, + {0x684317d, 0xe1633081}, {0x14ee2d13, 0xc8d2e345}, + {0x3918fe2d, 0xbbeeec72}, {0x3b98b31c, 0xe1633081}, + {0x3d49f40e, 0xe1633081}, {0x432c41c5, 0xe1633081}, + {0x491b6ad0, 0xe1633081}, {0x5612cab1, 0x59b9f8f1}, + {0x779ce19d, 0xc8d2e345}, {0x7cc9510b, 0x59b9f8f1}, + {0x83746053, 0xbbeeec72}, {0xaaa60c03, 0xbbeeec72}, + {0xbf85ff26, 0xe1633081}, {0xc04fe601, 0xbbeeec72}, + {0xca3812d5, 0x59b9f8f1}, {0xca383e15, 0x59b9f8f1}, + {0xcad5eaf6, 0x59b9f8f1}, {0xcb7a04c8, 0xc8d2e345}, + {0xfb4ce0de, 0xe1633081}, +}; + +const FPF_SKIAFONTMAP g_SkiaSansFontMap[] = { + {0x58c5083, 0xd5b8d10f}, {0x14ee2d13, 0xd5b8d10f}, + {0x779ce19d, 0xd5b8d10f}, {0xcb7a04c8, 0xd5b8d10f}, + {0xfb4ce0de, 0xd5b8d10f}, +}; + +uint32_t FPF_SkiaGetSubstFont(uint32_t dwHash, + const FPF_SKIAFONTMAP* skFontMap, + size_t length) { + const FPF_SKIAFONTMAP* pEnd = skFontMap + length; + const FPF_SKIAFONTMAP* pFontMap = std::lower_bound( + skFontMap, pEnd, dwHash, [](const FPF_SKIAFONTMAP& item, uint32_t hash) { + return item.dwFamily < hash; + }); + if (pFontMap < pEnd && pFontMap->dwFamily == dwHash) + return pFontMap->dwSubSt; + return 0; +} + +uint32_t FPF_GetHashCode_StringA(const FX_CHAR* pStr, int32_t iLength) { + if (!pStr) + return 0; + if (iLength < 0) + iLength = FXSYS_strlen(pStr); + const FX_CHAR* pStrEnd = pStr + iLength; + uint32_t uHashCode = 0; + while (pStr < pStrEnd) + uHashCode = 31 * uHashCode + FXSYS_tolower(*pStr++); + return uHashCode; +} + +enum FPF_SKIACHARSET { + FPF_SKIACHARSET_Ansi = 1 << 0, + FPF_SKIACHARSET_Default = 1 << 1, + FPF_SKIACHARSET_Symbol = 1 << 2, + FPF_SKIACHARSET_ShiftJIS = 1 << 3, + FPF_SKIACHARSET_Korean = 1 << 4, + FPF_SKIACHARSET_Johab = 1 << 5, + FPF_SKIACHARSET_GB2312 = 1 << 6, + FPF_SKIACHARSET_BIG5 = 1 << 7, + FPF_SKIACHARSET_Greek = 1 << 8, + FPF_SKIACHARSET_Turkish = 1 << 9, + FPF_SKIACHARSET_Vietnamese = 1 << 10, + FPF_SKIACHARSET_Hebrew = 1 << 11, + FPF_SKIACHARSET_Arabic = 1 << 12, + FPF_SKIACHARSET_Baltic = 1 << 13, + FPF_SKIACHARSET_Cyrillic = 1 << 14, + FPF_SKIACHARSET_Thai = 1 << 15, + FPF_SKIACHARSET_EeasternEuropean = 1 << 16, + FPF_SKIACHARSET_PC = 1 << 17, + FPF_SKIACHARSET_OEM = 1 << 18, +}; + +uint32_t FPF_SkiaGetCharset(uint8_t uCharset) { + switch (uCharset) { + case FXFONT_ANSI_CHARSET: + return FPF_SKIACHARSET_Ansi; + case FXFONT_DEFAULT_CHARSET: + return FPF_SKIACHARSET_Default; + case FXFONT_SYMBOL_CHARSET: + return FPF_SKIACHARSET_Symbol; + case FXFONT_SHIFTJIS_CHARSET: + return FPF_SKIACHARSET_ShiftJIS; + case FXFONT_HANGUL_CHARSET: + return FPF_SKIACHARSET_Korean; + case FXFONT_GB2312_CHARSET: + return FPF_SKIACHARSET_GB2312; + case FXFONT_CHINESEBIG5_CHARSET: + return FPF_SKIACHARSET_BIG5; + case FXFONT_GREEK_CHARSET: + return FPF_SKIACHARSET_Greek; + case FXFONT_TURKISH_CHARSET: + return FPF_SKIACHARSET_Turkish; + case FXFONT_HEBREW_CHARSET: + return FPF_SKIACHARSET_Hebrew; + case FXFONT_ARABIC_CHARSET: + return FPF_SKIACHARSET_Arabic; + case FXFONT_BALTIC_CHARSET: + return FPF_SKIACHARSET_Baltic; + case FXFONT_RUSSIAN_CHARSET: + return FPF_SKIACHARSET_Cyrillic; + case FXFONT_THAI_CHARSET: + return FPF_SKIACHARSET_Thai; + case FXFONT_EASTEUROPE_CHARSET: + return FPF_SKIACHARSET_EeasternEuropean; + } + return FPF_SKIACHARSET_Default; +} + +uint32_t FPF_SKIANormalizeFontName(const CFX_ByteStringC& bsfamily) { + uint32_t dwHash = 0; + int32_t iLength = bsfamily.GetLength(); + const FX_CHAR* pBuffer = bsfamily.c_str(); + for (int32_t i = 0; i < iLength; i++) { + FX_CHAR ch = pBuffer[i]; + if (ch == ' ' || ch == '-' || ch == ',') + continue; + dwHash = 31 * dwHash + FXSYS_tolower(ch); + } + return dwHash; +} + +uint32_t FPF_SKIAGetFamilyHash(const CFX_ByteStringC& bsFamily, + uint32_t dwStyle, + uint8_t uCharset) { + CFX_ByteString bsFont(bsFamily); + if (dwStyle & FXFONT_BOLD) + bsFont += "Bold"; + if (dwStyle & FXFONT_ITALIC) + bsFont += "Italic"; + if (dwStyle & FXFONT_SERIF) + bsFont += "Serif"; + bsFont += uCharset; + return FPF_GetHashCode_StringA(bsFont.c_str(), bsFont.GetLength()); +} + +bool FPF_SkiaIsCJK(uint8_t uCharset) { + return (uCharset == FXFONT_GB2312_CHARSET) || + (uCharset == FXFONT_CHINESEBIG5_CHARSET) || + (uCharset == FXFONT_HANGUL_CHARSET) || + (uCharset == FXFONT_SHIFTJIS_CHARSET); +} + +bool FPF_SkiaMaybeSymbol(const CFX_ByteStringC& bsFacename) { + CFX_ByteString bsName(bsFacename); + bsName.MakeLower(); + return bsName.Find("symbol") > -1; +} + +bool FPF_SkiaMaybeArabic(const CFX_ByteStringC& bsFacename) { + CFX_ByteString bsName(bsFacename); + bsName.MakeLower(); + return bsName.Find("arabic") > -1; +} + +const uint32_t g_FPFSkiaFontCharsets[] = { + FPF_SKIACHARSET_Ansi, + FPF_SKIACHARSET_EeasternEuropean, + FPF_SKIACHARSET_Cyrillic, + FPF_SKIACHARSET_Greek, + FPF_SKIACHARSET_Turkish, + FPF_SKIACHARSET_Hebrew, + FPF_SKIACHARSET_Arabic, + FPF_SKIACHARSET_Baltic, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + FPF_SKIACHARSET_Thai, + FPF_SKIACHARSET_ShiftJIS, + FPF_SKIACHARSET_GB2312, + FPF_SKIACHARSET_Korean, + FPF_SKIACHARSET_BIG5, + FPF_SKIACHARSET_Johab, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + FPF_SKIACHARSET_OEM, + FPF_SKIACHARSET_Symbol, +}; + +uint32_t FPF_SkiaGetFaceCharset(TT_OS2* pOS2) { + uint32_t dwCharset = 0; + if (pOS2) { + for (int32_t i = 0; i < 32; i++) { + if (pOS2->ulCodePageRange1 & (1 << i)) + dwCharset |= g_FPFSkiaFontCharsets[i]; + } + } + dwCharset |= FPF_SKIACHARSET_Default; + return dwCharset; +} + +} // namespace + +CFPF_SkiaFontMgr::CFPF_SkiaFontMgr() : m_bLoaded(false), m_FTLibrary(nullptr) {} + +CFPF_SkiaFontMgr::~CFPF_SkiaFontMgr() { + for (const auto& pair : m_FamilyFonts) { + if (pair.second) + pair.second->Release(); + } + m_FamilyFonts.clear(); + for (auto it = m_FontFaces.begin(); it != m_FontFaces.end(); ++it) + delete *it; + m_FontFaces.clear(); + if (m_FTLibrary) + FXFT_Done_FreeType(m_FTLibrary); +} + +bool CFPF_SkiaFontMgr::InitFTLibrary() { + if (!m_FTLibrary) + FXFT_Init_FreeType(&m_FTLibrary); + return !!m_FTLibrary; +} + +void CFPF_SkiaFontMgr::LoadSystemFonts() { + if (m_bLoaded) + return; + ScanPath("/system/fonts"); + m_bLoaded = true; +} + +CFPF_SkiaFont* CFPF_SkiaFontMgr::CreateFont(const CFX_ByteStringC& bsFamilyname, + uint8_t uCharset, + uint32_t dwStyle, + uint32_t dwMatch) { + uint32_t dwHash = FPF_SKIAGetFamilyHash(bsFamilyname, dwStyle, uCharset); + auto it = m_FamilyFonts.find(dwHash); + if (it != m_FamilyFonts.end() && it->second) + return it->second->Retain(); + + uint32_t dwFaceName = FPF_SKIANormalizeFontName(bsFamilyname); + uint32_t dwSubst = FPF_SkiaGetSubstFont(dwFaceName, g_SkiaFontmap, + FX_ArraySize(g_SkiaFontmap)); + uint32_t dwSubstSans = FPF_SkiaGetSubstFont(dwFaceName, g_SkiaSansFontMap, + FX_ArraySize(g_SkiaSansFontMap)); + bool bMaybeSymbol = FPF_SkiaMaybeSymbol(bsFamilyname); + if (uCharset != FXFONT_ARABIC_CHARSET && FPF_SkiaMaybeArabic(bsFamilyname)) { + uCharset = FXFONT_ARABIC_CHARSET; + } else if (uCharset == FXFONT_ANSI_CHARSET && + (dwMatch & FPF_MATCHFONT_REPLACEANSI)) { + uCharset = FXFONT_DEFAULT_CHARSET; + } + int32_t nExpectVal = FPF_SKIAMATCHWEIGHT_NAME1 + FPF_SKIAMATCHWEIGHT_1 * 3 + + FPF_SKIAMATCHWEIGHT_2 * 2; + CFPF_SkiaFontDescriptor* pBestFontDes = nullptr; + int32_t nMax = -1; + int32_t nGlyphNum = 0; + for (auto it = m_FontFaces.rbegin(); it != m_FontFaces.rend(); ++it) { + CFPF_SkiaPathFont* pFontDes = static_cast<CFPF_SkiaPathFont*>(*it); + if (!(pFontDes->m_dwCharsets & FPF_SkiaGetCharset(uCharset))) + continue; + int32_t nFind = 0; + uint32_t dwSysFontName = FPF_SKIANormalizeFontName(pFontDes->m_pFamily); + if (dwFaceName == dwSysFontName) + nFind += FPF_SKIAMATCHWEIGHT_NAME1; + bool bMatchedName = (nFind == FPF_SKIAMATCHWEIGHT_NAME1); + if ((dwStyle & FXFONT_BOLD) == (pFontDes->m_dwStyle & FXFONT_BOLD)) + nFind += FPF_SKIAMATCHWEIGHT_1; + if ((dwStyle & FXFONT_ITALIC) == (pFontDes->m_dwStyle & FXFONT_ITALIC)) + nFind += FPF_SKIAMATCHWEIGHT_1; + if ((dwStyle & FXFONT_FIXED_PITCH) == + (pFontDes->m_dwStyle & FXFONT_FIXED_PITCH)) { + nFind += FPF_SKIAMATCHWEIGHT_2; + } + if ((dwStyle & FXFONT_SERIF) == (pFontDes->m_dwStyle & FXFONT_SERIF)) + nFind += FPF_SKIAMATCHWEIGHT_1; + if ((dwStyle & FXFONT_SCRIPT) == (pFontDes->m_dwStyle & FXFONT_SCRIPT)) + nFind += FPF_SKIAMATCHWEIGHT_2; + if (dwSubst == dwSysFontName || dwSubstSans == dwSysFontName) { + nFind += FPF_SKIAMATCHWEIGHT_NAME2; + bMatchedName = true; + } + if (uCharset == FXFONT_DEFAULT_CHARSET || bMaybeSymbol) { + if (nFind > nMax && bMatchedName) { + nMax = nFind; + pBestFontDes = *it; + } + } else if (FPF_SkiaIsCJK(uCharset)) { + if (bMatchedName || pFontDes->m_iGlyphNum > nGlyphNum) { + pBestFontDes = *it; + nGlyphNum = pFontDes->m_iGlyphNum; + } + } else if (nFind > nMax) { + nMax = nFind; + pBestFontDes = *it; + } + if (nExpectVal <= nFind) { + pBestFontDes = *it; + break; + } + } + if (pBestFontDes) { + CFPF_SkiaFont* pFont = new CFPF_SkiaFont; + if (pFont->InitFont(this, pBestFontDes, bsFamilyname, dwStyle, uCharset)) { + m_FamilyFonts[dwHash] = pFont; + return pFont->Retain(); + } + pFont->Release(); + } + return nullptr; +} + +FXFT_Face CFPF_SkiaFontMgr::GetFontFace(IFX_FileRead* pFileRead, + int32_t iFaceIndex) { + if (!pFileRead) + return nullptr; + if (pFileRead->GetSize() == 0) + return nullptr; + if (iFaceIndex < 0) + return nullptr; + FXFT_StreamRec streamRec; + FXSYS_memset(&streamRec, 0, sizeof(FXFT_StreamRec)); + streamRec.size = pFileRead->GetSize(); + streamRec.descriptor.pointer = pFileRead; + streamRec.read = FPF_SkiaStream_Read; + streamRec.close = FPF_SkiaStream_Close; + FXFT_Open_Args args; + args.flags = FT_OPEN_STREAM; + args.stream = &streamRec; + FXFT_Face face; + if (FXFT_Open_Face(m_FTLibrary, &args, iFaceIndex, &face)) + return nullptr; + FXFT_Set_Pixel_Sizes(face, 0, 64); + return face; +} + +FXFT_Face CFPF_SkiaFontMgr::GetFontFace(const CFX_ByteStringC& bsFile, + int32_t iFaceIndex) { + if (bsFile.IsEmpty()) + return nullptr; + if (iFaceIndex < 0) + return nullptr; + FXFT_Open_Args args; + args.flags = FT_OPEN_PATHNAME; + args.pathname = const_cast<FT_String*>(bsFile.c_str()); + FXFT_Face face; + if (FXFT_Open_Face(m_FTLibrary, &args, iFaceIndex, &face)) + return nullptr; + FXFT_Set_Pixel_Sizes(face, 0, 64); + return face; +} + +FXFT_Face CFPF_SkiaFontMgr::GetFontFace(const uint8_t* pBuffer, + size_t szBuffer, + int32_t iFaceIndex) { + if (!pBuffer || szBuffer < 1) + return nullptr; + if (iFaceIndex < 0) + return nullptr; + FXFT_Open_Args args; + args.flags = FT_OPEN_MEMORY; + args.memory_base = pBuffer; + args.memory_size = szBuffer; + FXFT_Face face; + if (FXFT_Open_Face(m_FTLibrary, &args, iFaceIndex, &face)) + return nullptr; + FXFT_Set_Pixel_Sizes(face, 0, 64); + return face; +} + +void CFPF_SkiaFontMgr::ScanPath(const CFX_ByteString& path) { + DIR* handle = FX_OpenFolder(path.c_str()); + if (!handle) + return; + CFX_ByteString filename; + bool bFolder = false; + while (FX_GetNextFile(handle, &filename, &bFolder)) { + if (bFolder) { + if (filename == "." || filename == "..") + continue; + } else { + CFX_ByteString ext = filename.Right(4); + ext.MakeLower(); + if (ext != ".ttf" && ext != ".ttc" && ext != ".otf") + continue; + } + CFX_ByteString fullpath(path); + fullpath += "/"; + fullpath += filename; + if (bFolder) + ScanPath(fullpath); + else + ScanFile(fullpath); + } + FX_CloseFolder(handle); +} + +void CFPF_SkiaFontMgr::ScanFile(const CFX_ByteString& file) { + FXFT_Face face = GetFontFace(file.AsStringC()); + if (!face) + return; + CFPF_SkiaPathFont* pFontDesc = new CFPF_SkiaPathFont; + pFontDesc->SetPath(file.c_str()); + ReportFace(face, pFontDesc); + m_FontFaces.push_back(pFontDesc); + FXFT_Done_Face(face); +} + +void CFPF_SkiaFontMgr::ReportFace(FXFT_Face face, + CFPF_SkiaFontDescriptor* pFontDesc) { + if (!face || !pFontDesc) + return; + pFontDesc->SetFamily(FXFT_Get_Face_Family_Name(face)); + if (FXFT_Is_Face_Bold(face)) + pFontDesc->m_dwStyle |= FXFONT_BOLD; + if (FXFT_Is_Face_Italic(face)) + pFontDesc->m_dwStyle |= FXFONT_ITALIC; + if (FT_IS_FIXED_WIDTH(face)) + pFontDesc->m_dwStyle |= FXFONT_FIXED_PITCH; + TT_OS2* pOS2 = (TT_OS2*)FT_Get_Sfnt_Table(face, ft_sfnt_os2); + if (pOS2) { + if (pOS2->ulCodePageRange1 & (1 << 31)) + pFontDesc->m_dwStyle |= FXFONT_SYMBOLIC; + if (pOS2->panose[0] == 2) { + uint8_t uSerif = pOS2->panose[1]; + if ((uSerif > 1 && uSerif < 10) || uSerif > 13) + pFontDesc->m_dwStyle |= FXFONT_SERIF; + } + } + if (pOS2 && (pOS2->ulCodePageRange1 & (1 << 31))) + pFontDesc->m_dwStyle |= FXFONT_SYMBOLIC; + pFontDesc->m_dwCharsets = FPF_SkiaGetFaceCharset(pOS2); + pFontDesc->m_iFaceIndex = face->face_index; + pFontDesc->m_iGlyphNum = face->num_glyphs; +} |