Splitting fx_ge_fontmap.cpp

core/fxge/ge/cfx_folderfontinfo.cpp

+// Copyright 2016 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/fxge/include/fx_font.h"
+
+#include "third_party/base/stl_util.h"
+
+namespace {
+
+const struct {
+  const FX_CHAR* m_pName;
+  const FX_CHAR* m_pSubstName;
+} Base14Substs[] = {
+    {"Courier", "Courier New"},
+    {"Courier-Bold", "Courier New Bold"},
+    {"Courier-BoldOblique", "Courier New Bold Italic"},
+    {"Courier-Oblique", "Courier New Italic"},
+    {"Helvetica", "Arial"},
+    {"Helvetica-Bold", "Arial Bold"},
+    {"Helvetica-BoldOblique", "Arial Bold Italic"},
+    {"Helvetica-Oblique", "Arial Italic"},
+    {"Times-Roman", "Times New Roman"},
+    {"Times-Bold", "Times New Roman Bold"},
+    {"Times-BoldItalic", "Times New Roman Bold Italic"},
+    {"Times-Italic", "Times New Roman Italic"},
+};
+
+const uint32_t kTableTTCF = FXDWORD_GET_MSBFIRST("ttcf");
+
+CFX_ByteString FPDF_ReadStringFromFile(FXSYS_FILE* pFile, uint32_t size) {
+  CFX_ByteString buffer;
+  if (!FXSYS_fread(buffer.GetBuffer(size), size, 1, pFile)) {
+    return CFX_ByteString();
+  }
+  buffer.ReleaseBuffer(size);
+  return buffer;
+}
+
+CFX_ByteString FPDF_LoadTableFromTT(FXSYS_FILE* pFile,
+                                    const uint8_t* pTables,
+                                    uint32_t nTables,
+                                    uint32_t tag) {
+  for (uint32_t i = 0; i < nTables; i++) {
+    const uint8_t* p = pTables + i * 16;
+    if (GET_TT_LONG(p) == tag) {
+      uint32_t offset = GET_TT_LONG(p + 8);
+      uint32_t size = GET_TT_LONG(p + 12);
+      FXSYS_fseek(pFile, offset, FXSYS_SEEK_SET);
+      return FPDF_ReadStringFromFile(pFile, size);
+    }
+  }
+  return CFX_ByteString();
+}
+
+uint32_t GetCharset(int charset) {
+  switch (charset) {
+    case FXFONT_SHIFTJIS_CHARSET:
+      return CHARSET_FLAG_SHIFTJIS;
+    case FXFONT_GB2312_CHARSET:
+      return CHARSET_FLAG_GB;
+    case FXFONT_CHINESEBIG5_CHARSET:
+      return CHARSET_FLAG_BIG5;
+    case FXFONT_HANGEUL_CHARSET:
+      return CHARSET_FLAG_KOREAN;
+    case FXFONT_SYMBOL_CHARSET:
+      return CHARSET_FLAG_SYMBOL;
+    case FXFONT_ANSI_CHARSET:
+      return CHARSET_FLAG_ANSI;
+    default:
+      break;
+  }
+  return 0;
+}
+
+int32_t GetSimilarValue(int weight,
+                        FX_BOOL bItalic,
+                        int pitch_family,
+                        uint32_t style) {
+  int32_t iSimilarValue = 0;
+  if (!!(style & FXFONT_BOLD) == (weight > 400)) {
+    iSimilarValue += 16;
+  }
+  if (!!(style & FXFONT_ITALIC) == bItalic) {
+    iSimilarValue += 16;
+  }
+  if (!!(style & FXFONT_SERIF) == !!(pitch_family & FXFONT_FF_ROMAN)) {
+    iSimilarValue += 16;
+  }
+  if (!!(style & FXFONT_SCRIPT) == !!(pitch_family & FXFONT_FF_SCRIPT)) {
+    iSimilarValue += 8;
+  }
+  if (!!(style & FXFONT_FIXED_PITCH) ==
+      !!(pitch_family & FXFONT_FF_FIXEDPITCH)) {
+    iSimilarValue += 8;
+  }
+  return iSimilarValue;
+}
+
+}  // namespace
+
+CFX_FolderFontInfo::CFX_FolderFontInfo() {}
+
+CFX_FolderFontInfo::~CFX_FolderFontInfo() {
+  for (const auto& pair : m_FontList) {
+    delete pair.second;
+  }
+}
+
+void CFX_FolderFontInfo::AddPath(const CFX_ByteStringC& path) {
+  m_PathList.push_back(CFX_ByteString(path));
+}
+
+FX_BOOL CFX_FolderFontInfo::EnumFontList(CFX_FontMapper* pMapper) {
+  m_pMapper = pMapper;
+  for (const auto& path : m_PathList)
+    ScanPath(path);
+  return TRUE;
+}
+void CFX_FolderFontInfo::ScanPath(const CFX_ByteString& path) {
+  void* handle = FX_OpenFolder(path.c_str());
+  if (!handle)
+    return;
+
+  CFX_ByteString filename;
+  FX_BOOL bFolder;
+  while (FX_GetNextFile(handle, filename, bFolder)) {
+    if (bFolder) {
+      if (filename == "." || filename == "..")
+        continue;
+    } else {
+      CFX_ByteString ext = filename.Right(4);
+      ext.MakeUpper();
+      if (ext != ".TTF" && ext != ".OTF" && ext != ".TTC")
+        continue;
+    }
+
+    CFX_ByteString fullpath = path;
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+    fullpath += "\\";
+#else
+    fullpath += "/";
+#endif
+
+    fullpath += filename;
+    bFolder ? ScanPath(fullpath) : ScanFile(fullpath);
+  }
+  FX_CloseFolder(handle);
+}
+
+void CFX_FolderFontInfo::ScanFile(const CFX_ByteString& path) {
+  FXSYS_FILE* pFile = FXSYS_fopen(path.c_str(), "rb");
+  if (!pFile)
+    return;
+
+  FXSYS_fseek(pFile, 0, FXSYS_SEEK_END);
+
+  uint32_t filesize = FXSYS_ftell(pFile);
+  uint8_t buffer[16];
+  FXSYS_fseek(pFile, 0, FXSYS_SEEK_SET);
+
+  size_t readCnt = FXSYS_fread(buffer, 12, 1, pFile);
+  if (readCnt != 1) {
+    FXSYS_fclose(pFile);
+    return;
+  }
+
+  if (GET_TT_LONG(buffer) == kTableTTCF) {
+    uint32_t nFaces = GET_TT_LONG(buffer + 8);
+    if (nFaces > std::numeric_limits<uint32_t>::max() / 4) {
+      FXSYS_fclose(pFile);
+      return;
+    }
+    uint32_t face_bytes = nFaces * 4;
+    uint8_t* offsets = FX_Alloc(uint8_t, face_bytes);
+    readCnt = FXSYS_fread(offsets, 1, face_bytes, pFile);
+    if (readCnt != face_bytes) {
+      FX_Free(offsets);
+      FXSYS_fclose(pFile);
+      return;
+    }
+    for (uint32_t i = 0; i < nFaces; i++) {
+      uint8_t* p = offsets + i * 4;
+      ReportFace(path, pFile, filesize, GET_TT_LONG(p));
+    }
+    FX_Free(offsets);
+  } else {
+    ReportFace(path, pFile, filesize, 0);
+  }
+  FXSYS_fclose(pFile);
+}
+void CFX_FolderFontInfo::ReportFace(const CFX_ByteString& path,
+                                    FXSYS_FILE* pFile,
+                                    uint32_t filesize,
+                                    uint32_t offset) {
+  FXSYS_fseek(pFile, offset, FXSYS_SEEK_SET);
+  char buffer[16];
+  if (!FXSYS_fread(buffer, 12, 1, pFile))
+    return;
+
+  uint32_t nTables = GET_TT_SHORT(buffer + 4);
+  CFX_ByteString tables = FPDF_ReadStringFromFile(pFile, nTables * 16);
+  if (tables.IsEmpty())
+    return;
+
+  CFX_ByteString names =
+      FPDF_LoadTableFromTT(pFile, tables.raw_str(), nTables, 0x6e616d65);
+  if (names.IsEmpty())
+    return;
+
+  CFX_ByteString facename =
+      GetNameFromTT(names.raw_str(), names.GetLength(), 1);
+  if (facename.IsEmpty())
+    return;
+
+  CFX_ByteString style = GetNameFromTT(names.raw_str(), names.GetLength(), 2);
+  if (style != "Regular")
+    facename += " " + style;
+
+  if (pdfium::ContainsKey(m_FontList, facename))
+    return;
+
+  CFX_FontFaceInfo* pInfo =
+      new CFX_FontFaceInfo(path, facename, tables, offset, filesize);
+  CFX_ByteString os2 =
+      FPDF_LoadTableFromTT(pFile, tables.raw_str(), nTables, 0x4f532f32);
+  if (os2.GetLength() >= 86) {
+    const uint8_t* p = os2.raw_str() + 78;
+    uint32_t codepages = GET_TT_LONG(p);
+    if (codepages & (1 << 17)) {
+      m_pMapper->AddInstalledFont(facename, FXFONT_SHIFTJIS_CHARSET);
+      pInfo->m_Charsets |= CHARSET_FLAG_SHIFTJIS;
+    }
+    if (codepages & (1 << 18)) {
+      m_pMapper->AddInstalledFont(facename, FXFONT_GB2312_CHARSET);
+      pInfo->m_Charsets |= CHARSET_FLAG_GB;
+    }
+    if (codepages & (1 << 20)) {
+      m_pMapper->AddInstalledFont(facename, FXFONT_CHINESEBIG5_CHARSET);
+      pInfo->m_Charsets |= CHARSET_FLAG_BIG5;
+    }
+    if ((codepages & (1 << 19)) || (codepages & (1 << 21))) {
+      m_pMapper->AddInstalledFont(facename, FXFONT_HANGEUL_CHARSET);
+      pInfo->m_Charsets |= CHARSET_FLAG_KOREAN;
+    }
+    if (codepages & (1 << 31)) {
+      m_pMapper->AddInstalledFont(facename, FXFONT_SYMBOL_CHARSET);
+      pInfo->m_Charsets |= CHARSET_FLAG_SYMBOL;
+    }
+  }
+  m_pMapper->AddInstalledFont(facename, FXFONT_ANSI_CHARSET);
+  pInfo->m_Charsets |= CHARSET_FLAG_ANSI;
+  pInfo->m_Styles = 0;
+  if (style.Find("Bold") > -1)
+    pInfo->m_Styles |= FXFONT_BOLD;
+  if (style.Find("Italic") > -1 || style.Find("Oblique") > -1)
+    pInfo->m_Styles |= FXFONT_ITALIC;
+  if (facename.Find("Serif") > -1)
+    pInfo->m_Styles |= FXFONT_SERIF;
+
+  m_FontList[facename] = pInfo;
+}
+
+void* CFX_FolderFontInfo::GetSubstFont(const CFX_ByteString& face) {
+  for (size_t iBaseFont = 0; iBaseFont < FX_ArraySize(Base14Substs);
+       iBaseFont++) {
+    if (face == Base14Substs[iBaseFont].m_pName)
+      return GetFont(Base14Substs[iBaseFont].m_pSubstName);
+  }
+  return nullptr;
+}
+
+void* CFX_FolderFontInfo::FindFont(int weight,
+                                   FX_BOOL bItalic,
+                                   int charset,
+                                   int pitch_family,
+                                   const FX_CHAR* family,
+                                   FX_BOOL bMatchName) {
+  CFX_FontFaceInfo* pFind = nullptr;
+  if (charset == FXFONT_ANSI_CHARSET && (pitch_family & FXFONT_FF_FIXEDPITCH)) {
+    return GetFont("Courier New");
+  }
+  uint32_t charset_flag = GetCharset(charset);
+  int32_t iBestSimilar = 0;
+  for (const auto& it : m_FontList) {
+    const CFX_ByteString& bsName = it.first;
+    CFX_FontFaceInfo* pFont = it.second;
+    if (!(pFont->m_Charsets & charset_flag) &&
+        charset != FXFONT_DEFAULT_CHARSET) {
+      continue;
+    }
+    int32_t index = bsName.Find(family);
+    if (bMatchName && index < 0) {
+      continue;
+    }
+    int32_t iSimilarValue =
+        GetSimilarValue(weight, bItalic, pitch_family, pFont->m_Styles);
+    if (iSimilarValue > iBestSimilar) {
+      iBestSimilar = iSimilarValue;
+      pFind = pFont;
+    }
+  }
+  return pFind;
+}
+void* CFX_FolderFontInfo::MapFont(int weight,
+                                  FX_BOOL bItalic,
+                                  int charset,
+                                  int pitch_family,
+                                  const FX_CHAR* family,
+                                  int& iExact) {
+  return nullptr;
+}
+
+#ifdef PDF_ENABLE_XFA
+void* CFX_FolderFontInfo::MapFontByUnicode(uint32_t dwUnicode,
+                                           int weight,
+                                           FX_BOOL bItalic,
+                                           int pitch_family) {
+  return nullptr;
+}
+#endif  // PDF_ENABLE_XFA
+
+void* CFX_FolderFontInfo::GetFont(const FX_CHAR* face) {
+  auto it = m_FontList.find(face);
+  return it != m_FontList.end() ? it->second : nullptr;
+}
+
+uint32_t CFX_FolderFontInfo::GetFontData(void* hFont,
+                                         uint32_t table,
+                                         uint8_t* buffer,
+                                         uint32_t size) {
+  if (!hFont)
+    return 0;
+
+  const CFX_FontFaceInfo* pFont = static_cast<CFX_FontFaceInfo*>(hFont);
+  uint32_t datasize = 0;
+  uint32_t offset = 0;
+  if (table == 0) {
+    datasize = pFont->m_FontOffset ? 0 : pFont->m_FileSize;
+  } else if (table == kTableTTCF) {
+    datasize = pFont->m_FontOffset ? pFont->m_FileSize : 0;
+  } else {
+    uint32_t nTables = pFont->m_FontTables.GetLength() / 16;
+    for (uint32_t i = 0; i < nTables; i++) {
+      const uint8_t* p = pFont->m_FontTables.raw_str() + i * 16;
+      if (GET_TT_LONG(p) == table) {
+        offset = GET_TT_LONG(p + 8);
+        datasize = GET_TT_LONG(p + 12);
+      }
+    }
+  }
+
+  if (!datasize || size < datasize)
+    return datasize;
+
+  FXSYS_FILE* pFile = FXSYS_fopen(pFont->m_FilePath.c_str(), "rb");
+  if (!pFile)
+    return 0;
+
+  if (FXSYS_fseek(pFile, offset, FXSYS_SEEK_SET) < 0 ||
+      FXSYS_fread(buffer, datasize, 1, pFile) != 1) {
+    datasize = 0;
+  }
+  FXSYS_fclose(pFile);
+  return datasize;
+}
+
+void CFX_FolderFontInfo::DeleteFont(void* hFont) {}
+FX_BOOL CFX_FolderFontInfo::GetFaceName(void* hFont, CFX_ByteString& name) {
+  if (!hFont) {
+    return FALSE;
+  }
+  CFX_FontFaceInfo* pFont = (CFX_FontFaceInfo*)hFont;
+  name = pFont->m_FaceName;
+  return TRUE;
+}
+FX_BOOL CFX_FolderFontInfo::GetFontCharset(void* hFont, int& charset) {
+  return FALSE;
+}