splash/SplashFontEngine.h

//========================================================================
//
// SplashFontEngine.h
//
//========================================================================

//========================================================================
//
// 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 Petr Gajdos <pgajdos@novell.com>
// Copyright (C) 2009, 2011, 2018 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2011 Andreas Hartmetz <ahartmetz@gmail.com>
// Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2017 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2018 Oliver Sander <oliver.sander@tu-dresden.de>
//
// 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
//
//========================================================================

#ifndef SPLASHFONTENGINE_H
#define SPLASHFONTENGINE_H

#include <array>

#include "SplashTypes.h"

class SplashT1FontEngine;
class SplashFTFontEngine;
class SplashDTFontEngine;
class SplashDT4FontEngine;
class SplashFontFile;
class SplashFontFileID;
class SplashFont;
class SplashFontSrc;

//------------------------------------------------------------------------
// SplashFontEngine
//------------------------------------------------------------------------

class SplashFontEngine {
public:

  // Create a font engine.
  SplashFontEngine(
		   bool enableFreeType,
		   bool enableFreeTypeHinting,
		   bool enableSlightHinting,
		   bool aa);

  ~SplashFontEngine();

  SplashFontEngine(const SplashFontEngine &) = delete;
  SplashFontEngine& operator=(const SplashFontEngine &) = delete;

  // Get a font file from the cache.  Returns NULL if there is no
  // matching entry in the cache.
  SplashFontFile *getFontFile(SplashFontFileID *id);

  // Load fonts - these create new SplashFontFile objects.
  SplashFontFile *loadType1Font(SplashFontFileID *idA, SplashFontSrc *src, const char **enc);
  SplashFontFile *loadType1CFont(SplashFontFileID *idA, SplashFontSrc *src, const char **enc);
  SplashFontFile *loadOpenTypeT1CFont(SplashFontFileID *idA, SplashFontSrc *src, const char **enc);
  SplashFontFile *loadCIDFont(SplashFontFileID *idA, SplashFontSrc *src);
  SplashFontFile *loadOpenTypeCFFFont(SplashFontFileID *idA, SplashFontSrc *src,
                                      int *codeToGID, int codeToGIDLen);
  SplashFontFile *loadTrueTypeFont(SplashFontFileID *idA, SplashFontSrc *src,
				   int *codeToGID, int codeToGIDLen, int faceIndex = 0);

  // Get a font - this does a cache lookup first, and if not found,
  // creates a new SplashFont object and adds it to the cache.  The
  // matrix, mat = textMat * ctm:
  //    [ mat[0] mat[1] ]
  //    [ mat[2] mat[3] ]
  // specifies the font transform in PostScript style:
  //    [x' y'] = [x y] * mat
  // Note that the Splash y axis points downward.
  SplashFont *getFont(SplashFontFile *fontFile,
		      const SplashCoord *textMat, const SplashCoord *ctm);
  bool getAA();
  void setAA(bool aa);

private:

  std::array<SplashFont*,16> fontCache;

  SplashFTFontEngine *ftEngine;
};

#endif