godot/thirdparty/freetype/src/gxvalid/gxvlcar.c

/****************************************************************************
 *
 * gxvlcar.c
 *
 *   TrueTypeGX/AAT lcar table validation (body).
 *
 * Copyright (C) 2004-2023 by
 * suzuki toshiya, Masatake YAMATO, Red Hat K.K.,
 * David Turner, Robert Wilhelm, and Werner Lemberg.
 *
 * This file is part of the FreeType project, and may only be used,
 * modified, and distributed under the terms of the FreeType project
 * license, LICENSE.TXT.  By continuing to use, modify, or distribute
 * this file you indicate that you have read the license and
 * understand and accept it fully.
 *
 */

/****************************************************************************
 *
 * gxvalid is derived from both gxlayout module and otvalid module.
 * Development of gxlayout is supported by the Information-technology
 * Promotion Agency(IPA), Japan.
 *
 */


#include "gxvalid.h"
#include "gxvcommn.h"


  /**************************************************************************
   *
   * 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 …


  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                      Data and Types                           *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/

  GXV_lcar_Data;


#define GXV_LCAR_DATA( FIELD ) …


  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                      UTILITY FUNCTIONS                        *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/

  static void
  gxv_lcar_partial_validate( FT_Short       partial,
                             FT_UShort      glyph,
                             GXV_Validator  gxvalid )
  { … }


  static void
  gxv_lcar_LookupValue_validate( FT_UShort            glyph,
                                 GXV_LookupValueCPtr  value_p,
                                 GXV_Validator        gxvalid )
  { … }


  /*
    +------ lcar --------------------+
    |                                |
    |      +===============+         |
    |      | lookup header |         |
    |      +===============+         |
    |      | BinSrchHeader |         |
    |      +===============+         |
    |      | lastGlyph[0]  |         |
    |      +---------------+         |
    |      | firstGlyph[0] |         |  head of lcar sfnt table
    |      +---------------+         |             +
    |      | offset[0]     |    ->   |          offset            [byte]
    |      +===============+         |             +
    |      | lastGlyph[1]  |         | (glyphID - firstGlyph) * 2 [byte]
    |      +---------------+         |
    |      | firstGlyph[1] |         |
    |      +---------------+         |
    |      | offset[1]     |         |
    |      +===============+         |
    |                                |
    |       ....                     |
    |                                |
    |      16bit value array         |
    |      +===============+         |
    +------|     value     | <-------+
    |       ....
    |
    |
    |
    |
    |
    +---->  lcar values...handled by lcar callback function
  */

  static GXV_LookupValueDesc
  gxv_lcar_LookupFmt4_transit( FT_UShort            relative_gindex,
                               GXV_LookupValueCPtr  base_value_p,
                               FT_Bytes             lookuptbl_limit,
                               GXV_Validator        gxvalid )
  { … }


  /*************************************************************************/
  /*************************************************************************/
  /*****                                                               *****/
  /*****                          lcar TABLE                           *****/
  /*****                                                               *****/
  /*************************************************************************/
  /*************************************************************************/

  FT_LOCAL_DEF( void )
  gxv_lcar_validate( FT_Bytes      table,
                     FT_Face       face,
                     FT_Validator  ftvalid )
  { … }


/* END */