Move core/fpdfapi/fpdf_font to core/fpdfapi/font

core/fpdfapi/fpdf_font/cpdf_truetypefont.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/fpdfapi/fpdf_font/cpdf_truetypefont.h"
-
-#include "core/fpdfapi/fpdf_font/font_int.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"
-#include "core/fxge/fx_font.h"
-
-namespace {
-
-const uint8_t kPrefix[4] = {0x00, 0xf0, 0xf1, 0xf2};
-
-}  // namespace
-
-CPDF_TrueTypeFont::CPDF_TrueTypeFont() {}
-
-bool CPDF_TrueTypeFont::IsTrueTypeFont() const {
-  return true;
-}
-
-const CPDF_TrueTypeFont* CPDF_TrueTypeFont::AsTrueTypeFont() const {
-  return this;
-}
-
-CPDF_TrueTypeFont* CPDF_TrueTypeFont::AsTrueTypeFont() {
-  return this;
-}
-
-bool CPDF_TrueTypeFont::Load() {
-  return LoadCommon();
-}
-
-void CPDF_TrueTypeFont::LoadGlyphMap() {
-  if (!m_Font.GetFace())
-    return;
-
-  int baseEncoding = m_BaseEncoding;
-  if (m_pFontFile && m_Font.GetFace()->num_charmaps > 0 &&
-      (baseEncoding == PDFFONT_ENCODING_MACROMAN ||
-       baseEncoding == PDFFONT_ENCODING_WINANSI) &&
-      (m_Flags & PDFFONT_SYMBOLIC)) {
-    FX_BOOL bSupportWin = FALSE;
-    FX_BOOL bSupportMac = FALSE;
-    for (int i = 0; i < FXFT_Get_Face_CharmapCount(m_Font.GetFace()); i++) {
-      int platform_id = FXFT_Get_Charmap_PlatformID(
-          FXFT_Get_Face_Charmaps(m_Font.GetFace())[i]);
-      if (platform_id == 0 || platform_id == 3) {
-        bSupportWin = TRUE;
-      } else if (platform_id == 0 || platform_id == 1) {
-        bSupportMac = TRUE;
-      }
-    }
-    if (baseEncoding == PDFFONT_ENCODING_WINANSI && !bSupportWin) {
-      baseEncoding =
-          bSupportMac ? PDFFONT_ENCODING_MACROMAN : PDFFONT_ENCODING_BUILTIN;
-    } else if (baseEncoding == PDFFONT_ENCODING_MACROMAN && !bSupportMac) {
-      baseEncoding =
-          bSupportWin ? PDFFONT_ENCODING_WINANSI : PDFFONT_ENCODING_BUILTIN;
-    }
-  }
-  if (((baseEncoding == PDFFONT_ENCODING_MACROMAN ||
-        baseEncoding == PDFFONT_ENCODING_WINANSI) &&
-       m_CharNames.empty()) ||
-      (m_Flags & PDFFONT_NONSYMBOLIC)) {
-    if (!FXFT_Has_Glyph_Names(m_Font.GetFace()) &&
-        (!m_Font.GetFace()->num_charmaps || !m_Font.GetFace()->charmaps)) {
-      int nStartChar = m_pFontDict->GetIntegerFor("FirstChar");
-      if (nStartChar < 0 || nStartChar > 255)
-        return;
-
-      int charcode = 0;
-      for (; charcode < nStartChar; charcode++) {
-        m_GlyphIndex[charcode] = 0;
-      }
-      uint16_t nGlyph = charcode - nStartChar + 3;
-      for (; charcode < 256; charcode++, nGlyph++) {
-        m_GlyphIndex[charcode] = nGlyph;
-      }
-      return;
-    }
-    bool bMSUnicode = FT_UseTTCharmap(m_Font.GetFace(), 3, 1);
-    bool bMacRoman = false;
-    bool bMSSymbol = false;
-    if (!bMSUnicode) {
-      if (m_Flags & PDFFONT_NONSYMBOLIC) {
-        bMacRoman = FT_UseTTCharmap(m_Font.GetFace(), 1, 0);
-        bMSSymbol = !bMacRoman && FT_UseTTCharmap(m_Font.GetFace(), 3, 0);
-      } else {
-        bMSSymbol = FT_UseTTCharmap(m_Font.GetFace(), 3, 0);
-        bMacRoman = !bMSSymbol && FT_UseTTCharmap(m_Font.GetFace(), 1, 0);
-      }
-    }
-    FX_BOOL bToUnicode = m_pFontDict->KeyExist("ToUnicode");
-    for (int charcode = 0; charcode < 256; charcode++) {
-      const FX_CHAR* name =
-          GetAdobeCharName(baseEncoding, m_CharNames, charcode);
-      if (!name) {
-        m_GlyphIndex[charcode] =
-            m_pFontFile ? FXFT_Get_Char_Index(m_Font.GetFace(), charcode) : -1;
-        continue;
-      }
-      m_Encoding.m_Unicodes[charcode] = PDF_UnicodeFromAdobeName(name);
-      if (bMSSymbol) {
-        for (size_t j = 0; j < FX_ArraySize(kPrefix); j++) {
-          uint16_t unicode = kPrefix[j] * 256 + charcode;
-          m_GlyphIndex[charcode] =
-              FXFT_Get_Char_Index(m_Font.GetFace(), unicode);
-          if (m_GlyphIndex[charcode]) {
-            break;
-          }
-        }
-      } else if (m_Encoding.m_Unicodes[charcode]) {
-        if (bMSUnicode) {
-          m_GlyphIndex[charcode] = FXFT_Get_Char_Index(
-              m_Font.GetFace(), m_Encoding.m_Unicodes[charcode]);
-        } else if (bMacRoman) {
-          uint32_t maccode = FT_CharCodeFromUnicode(
-              FXFT_ENCODING_APPLE_ROMAN, m_Encoding.m_Unicodes[charcode]);
-          if (!maccode) {
-            m_GlyphIndex[charcode] =
-                FXFT_Get_Name_Index(m_Font.GetFace(), (char*)name);
-          } else {
-            m_GlyphIndex[charcode] =
-                FXFT_Get_Char_Index(m_Font.GetFace(), maccode);
-          }
-        }
-      }
-      if ((m_GlyphIndex[charcode] == 0 || m_GlyphIndex[charcode] == 0xffff) &&
-          name) {
-        if (name[0] == '.' && FXSYS_strcmp(name, ".notdef") == 0) {
-          m_GlyphIndex[charcode] = FXFT_Get_Char_Index(m_Font.GetFace(), 32);
-        } else {
-          m_GlyphIndex[charcode] =
-              FXFT_Get_Name_Index(m_Font.GetFace(), (char*)name);
-          if (m_GlyphIndex[charcode] == 0) {
-            if (bToUnicode) {
-              CFX_WideString wsUnicode = UnicodeFromCharCode(charcode);
-              if (!wsUnicode.IsEmpty()) {
-                m_GlyphIndex[charcode] =
-                    FXFT_Get_Char_Index(m_Font.GetFace(), wsUnicode[0]);
-                m_Encoding.m_Unicodes[charcode] = wsUnicode[0];
-              }
-            }
-            if (m_GlyphIndex[charcode] == 0) {
-              m_GlyphIndex[charcode] =
-                  FXFT_Get_Char_Index(m_Font.GetFace(), charcode);
-            }
-          }
-        }
-      }
-    }
-    return;
-  }
-  if (FT_UseTTCharmap(m_Font.GetFace(), 3, 0)) {
-    bool bFound = false;
-    for (int charcode = 0; charcode < 256; charcode++) {
-      for (size_t j = 0; j < FX_ArraySize(kPrefix); j++) {
-        uint16_t unicode = kPrefix[j] * 256 + charcode;
-        m_GlyphIndex[charcode] = FXFT_Get_Char_Index(m_Font.GetFace(), unicode);
-        if (m_GlyphIndex[charcode]) {
-          bFound = true;
-          break;
-        }
-      }
-    }
-    if (bFound) {
-      if (baseEncoding != PDFFONT_ENCODING_BUILTIN) {
-        for (int charcode = 0; charcode < 256; charcode++) {
-          const FX_CHAR* name =
-              GetAdobeCharName(baseEncoding, m_CharNames, charcode);
-          if (name)
-            m_Encoding.m_Unicodes[charcode] = PDF_UnicodeFromAdobeName(name);
-        }
-      } else if (FT_UseTTCharmap(m_Font.GetFace(), 1, 0)) {
-        for (int charcode = 0; charcode < 256; charcode++) {
-          m_Encoding.m_Unicodes[charcode] =
-              FT_UnicodeFromCharCode(FXFT_ENCODING_APPLE_ROMAN, charcode);
-        }
-      }
-      return;
-    }
-  }
-  if (FT_UseTTCharmap(m_Font.GetFace(), 1, 0)) {
-    bool bFound = false;
-    for (int charcode = 0; charcode < 256; charcode++) {
-      m_GlyphIndex[charcode] = FXFT_Get_Char_Index(m_Font.GetFace(), charcode);
-      m_Encoding.m_Unicodes[charcode] =
-          FT_UnicodeFromCharCode(FXFT_ENCODING_APPLE_ROMAN, charcode);
-      if (m_GlyphIndex[charcode]) {
-        bFound = true;
-      }
-    }
-    if (m_pFontFile || bFound)
-      return;
-  }
-  if (FXFT_Select_Charmap(m_Font.GetFace(), FXFT_ENCODING_UNICODE) == 0) {
-    bool bFound = false;
-    const uint16_t* pUnicodes = PDF_UnicodesForPredefinedCharSet(baseEncoding);
-    for (int charcode = 0; charcode < 256; charcode++) {
-      if (m_pFontFile) {
-        m_Encoding.m_Unicodes[charcode] = charcode;
-      } else {
-        const FX_CHAR* name = GetAdobeCharName(0, m_CharNames, charcode);
-        if (name)
-          m_Encoding.m_Unicodes[charcode] = PDF_UnicodeFromAdobeName(name);
-        else if (pUnicodes)
-          m_Encoding.m_Unicodes[charcode] = pUnicodes[charcode];
-      }
-      m_GlyphIndex[charcode] = FXFT_Get_Char_Index(
-          m_Font.GetFace(), m_Encoding.m_Unicodes[charcode]);
-      if (m_GlyphIndex[charcode])
-        bFound = true;
-    }
-    if (bFound)
-      return;
-  }
-  for (int charcode = 0; charcode < 256; charcode++)
-    m_GlyphIndex[charcode] = charcode;
-}