godot/thirdparty/freetype/src/psaux/psintrp.c

/****************************************************************************
 *
 * psintrp.c
 *
 *   Adobe's CFF Interpreter (body).
 *
 * Copyright 2007-2014 Adobe Systems Incorporated.
 *
 * This software, and all works of authorship, whether in source or
 * object code form as indicated by the copyright notice(s) included
 * herein (collectively, the "Work") is made available, and may only be
 * used, modified, and distributed under the FreeType Project License,
 * LICENSE.TXT.  Additionally, subject to the terms and conditions of the
 * FreeType Project License, each contributor to the Work hereby grants
 * to any individual or legal entity exercising permissions granted by
 * the FreeType Project License and this section (hereafter, "You" or
 * "Your") a perpetual, worldwide, non-exclusive, no-charge,
 * royalty-free, irrevocable (except as stated in this section) patent
 * license to make, have made, use, offer to sell, sell, import, and
 * otherwise transfer the Work, where such license applies only to those
 * patent claims licensable by such contributor that are necessarily
 * infringed by their contribution(s) alone or by combination of their
 * contribution(s) with the Work to which such contribution(s) was
 * submitted.  If You institute patent litigation against any entity
 * (including a cross-claim or counterclaim in a lawsuit) alleging that
 * the Work or a contribution incorporated within the Work constitutes
 * direct or contributory patent infringement, then any patent licenses
 * granted to You under this License for that Work shall terminate as of
 * the date such litigation is filed.
 *
 * By using, modifying, or distributing the Work you indicate that you
 * have read and understood the terms and conditions of the
 * FreeType Project License as well as those provided in this section,
 * and you accept them fully.
 *
 */


#include "psft.h"
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/services/svcfftl.h>

#include "psglue.h"
#include "psfont.h"
#include "psstack.h"
#include "pshints.h"
#include "psintrp.h"

#include "pserror.h"

#include "psobjs.h"   /* for cff_random */
#include "t1decode.h" /* for t1 seac    */


  /**************************************************************************
   *
   * The macro FT_COMPONENT is used in trace mode.  It is an implicit
   * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
   * messages during execution.
   */
#undef  FT_COMPONENT
#define FT_COMPONENT …


  FT_LOCAL_DEF( void )
  cf2_hintmask_init( CF2_HintMask  hintmask,
                     FT_Error*     error )
  { … }


  FT_LOCAL_DEF( FT_Bool )
  cf2_hintmask_isValid( const CF2_HintMask  hintmask )
  { … }


  FT_LOCAL_DEF( FT_Bool )
  cf2_hintmask_isNew( const CF2_HintMask  hintmask )
  { … }


  FT_LOCAL_DEF( void )
  cf2_hintmask_setNew( CF2_HintMask  hintmask,
                       FT_Bool       val )
  { … }


  /* clients call `getMaskPtr' in order to iterate */
  /* through hint mask                             */

  FT_LOCAL_DEF( FT_Byte* )
  cf2_hintmask_getMaskPtr( CF2_HintMask  hintmask )
  { … }


  static size_t
  cf2_hintmask_setCounts( CF2_HintMask  hintmask,
                          size_t        bitCount )
  { … }


  /* consume the hintmask bytes from the charstring, advancing the src */
  /* pointer                                                           */
  static void
  cf2_hintmask_read( CF2_HintMask  hintmask,
                     CF2_Buffer    charstring,
                     size_t        bitCount )
  { … }


  FT_LOCAL_DEF( void )
  cf2_hintmask_setAll( CF2_HintMask  hintmask,
                       size_t        bitCount )
  { … }


  /* Type2 charstring opcodes */
  enum
  { … };

  enum
  { … };


  /* `stemHintArray' does not change once we start drawing the outline. */
  static void
  cf2_doStems( const CF2_Font  font,
               CF2_Stack       opStack,
               CF2_ArrStack    stemHintArray,
               CF2_Fixed*      width,
               FT_Bool*        haveWidth,
               CF2_Fixed       hintOffset )
  { … }


  static void
  cf2_doFlex( CF2_Stack       opStack,
              CF2_Fixed*      curX,
              CF2_Fixed*      curY,
              CF2_GlyphPath   glyphPath,
              const FT_Bool*  readFromStack,
              FT_Bool         doConditionalLastRead )
  { … }


  /* Blend numOperands on the stack,                */
  /* store results into the first numBlends values, */
  /* then pop remaining arguments.                  */
  static void
  cf2_doBlend( const CFF_Blend  blend,
               CF2_Stack        opStack,
               CF2_UInt         numBlends )
  { … }


  /*
   * `error' is a shared error code used by many objects in this
   * routine.  Before the code continues from an error, it must check and
   * record the error in `*error'.  The idea is that this shared
   * error code will record the first error encountered.  If testing
   * for an error anyway, the cost of `goto exit' is small, so we do it,
   * even if continuing would be safe.  In this case, `lastError' is
   * set, so the testing and storing can be done in one place, at `exit'.
   *
   * Continuing after an error is intended for objects which do their own
   * testing of `*error', e.g., array stack functions.  This allows us to
   * avoid an extra test after the call.
   *
   * Unimplemented opcodes are ignored.
   *
   */
  FT_LOCAL_DEF( void )
  cf2_interpT2CharString( CF2_Font              font,
                          const CF2_Buffer      buf,
                          CF2_OutlineCallbacks  callbacks,
                          const FT_Vector*      translation,
                          FT_Bool               doingSeac,
                          CF2_Fixed             curX,
                          CF2_Fixed             curY,
                          CF2_Fixed*            width )
  { … }


/* END */