splash/SplashFTFontEngine.cc

//========================================================================
//
// SplashFTFontEngine.cc
//
//========================================================================

//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2006 Takashi Iwai <tiwai@suse.de>
// Copyright (C) 2009, 2011, 2012 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2009 Petr Gajdos <pgajdos@novell.com>
// Copyright (C) 2011 Andreas Hartmetz <ahartmetz@gmail.com>
// Copyright (C) 2017 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2019 Christian Persch <chpe@src.gnome.org>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================

#include <config.h>

#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "goo/gmem.h"
#include "goo/GooString.h"
#include "goo/gfile.h"
#include "fofi/FoFiTrueType.h"
#include "fofi/FoFiType1C.h"
#include "SplashFTFontFile.h"
#include "SplashFTFontEngine.h"

//------------------------------------------------------------------------
// SplashFTFontEngine
//------------------------------------------------------------------------

SplashFTFontEngine::SplashFTFontEngine(bool aaA, bool enableFreeTypeHintingA,
				       bool enableSlightHintingA, FT_Library libA) {
  FT_Int major, minor, patch;

  aa = aaA;
  enableFreeTypeHinting = enableFreeTypeHintingA;
  enableSlightHinting = enableSlightHintingA;
  lib = libA;

  // as of FT 2.1.8, CID fonts are indexed by CID instead of GID
  FT_Library_Version(lib, &major, &minor, &patch);
  useCIDs = major > 2 ||
            (major == 2 && (minor > 1 || (minor == 1 && patch > 7)));
}

SplashFTFontEngine *SplashFTFontEngine::init(bool aaA, bool enableFreeTypeHintingA,
					     bool enableSlightHintingA) {
  FT_Library libA;

  if (FT_Init_FreeType(&libA)) {
    return nullptr;
  }
  return new SplashFTFontEngine(aaA, enableFreeTypeHintingA, enableSlightHintingA, libA);
}

SplashFTFontEngine::~SplashFTFontEngine() {
  FT_Done_FreeType(lib);
}

SplashFontFile *SplashFTFontEngine::loadType1Font(SplashFontFileID *idA,
						  SplashFontSrc *src,
						  const char **enc) {
  return SplashFTFontFile::loadType1Font(this, idA, src, enc);
}

SplashFontFile *SplashFTFontEngine::loadType1CFont(SplashFontFileID *idA,
						   SplashFontSrc *src,
						   const char **enc) {
  return SplashFTFontFile::loadType1Font(this, idA, src, enc);
}

SplashFontFile *SplashFTFontEngine::loadOpenTypeT1CFont(SplashFontFileID *idA,
							SplashFontSrc *src,
							const char **enc) {
  return SplashFTFontFile::loadType1Font(this, idA, src, enc);
}

SplashFontFile *SplashFTFontEngine::loadCIDFont(SplashFontFileID *idA,
						SplashFontSrc *src) {
  FoFiType1C *ff;
  int *cidToGIDMap;
  int nCIDs;
  SplashFontFile *ret;

  // check for a CFF font
  if (useCIDs) {
    cidToGIDMap = nullptr;
    nCIDs = 0;
  } else {
    if (src->isFile) {
      ff = FoFiType1C::load(src->fileName->c_str());
    } else {
      ff = FoFiType1C::make(src->buf, src->bufLen);
    }
    if (ff) {
      cidToGIDMap = ff->getCIDToGIDMap(&nCIDs);
      delete ff;
    } else {
      cidToGIDMap = nullptr;
      nCIDs = 0;
    }
  }
  ret = SplashFTFontFile::loadCIDFont(this, idA, src, cidToGIDMap, nCIDs);
  if (!ret) {
    gfree(cidToGIDMap);
  }
  return ret;
}

SplashFontFile *SplashFTFontEngine::loadOpenTypeCFFFont(SplashFontFileID *idA,
							SplashFontSrc *src,
                                                        int *codeToGID,
                                                        int codeToGIDLen) {
  FoFiTrueType *ff;
  int *cidToGIDMap;
  int nCIDs;
  SplashFontFile *ret;

  cidToGIDMap = nullptr;
  nCIDs = 0;
  if (!codeToGID) {
    if (!useCIDs) {
      if (src->isFile) {
        ff = FoFiTrueType::load(src->fileName->c_str());
      } else {
        ff = FoFiTrueType::make(src->buf, src->bufLen);
      }
      if (ff) {
        if (ff->isOpenTypeCFF()) {
          cidToGIDMap = ff->getCIDToGIDMap(&nCIDs);
        }
        delete ff;
      }
    }
  }
  ret = SplashFTFontFile::loadCIDFont(this, idA, src,
                                      codeToGID ? codeToGID : cidToGIDMap,
                                      codeToGID ? codeToGIDLen : nCIDs);
  if (!ret) {
    gfree(cidToGIDMap);
  }
  return ret;
}

SplashFontFile *SplashFTFontEngine::loadTrueTypeFont(SplashFontFileID *idA,
						     SplashFontSrc *src,
						     int *codeToGID,
						     int codeToGIDLen,
						     int faceIndex) {
  SplashFontFile *ret;
  ret = SplashFTFontFile::loadTrueTypeFont(this, idA, src,
					   codeToGID, codeToGIDLen,
					   faceIndex);
  return ret;
}