ttobjs.c File Reference

#include <ft2build.h>
#include "ttgload.h"
#include "ttpload.h"
#include "tterrors.h"

Include dependency graph for ttobjs.c:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
struct	tt_sfnt_id_rec_

Macros
#define	FT_COMPONENT   trace_ttobjs
#define	TRICK_NAMES_MAX_CHARACTERS   19
#define	TRICK_NAMES_COUNT   23
#define	TRICK_SFNT_IDS_PER_FACE   3
#define	TRICK_SFNT_IDS_NUM_FACES   26
#define	TRICK_SFNT_ID_cvt   0
#define	TRICK_SFNT_ID_fpgm   1
#define	TRICK_SFNT_ID_prep   2

Typedefs
typedef struct tt_sfnt_id_rec_	tt_sfnt_id_rec

Functions
static FT_Bool	tt_check_trickyness_family (FT_String *name)
static FT_UInt32	tt_synth_sfnt_checksum (FT_Stream stream, FT_ULong length)
static FT_ULong	tt_get_sfnt_checksum (TT_Face face, FT_UShort i)
static FT_Bool	tt_check_trickyness_sfnt_ids (TT_Face face)
static FT_Bool	tt_check_trickyness (FT_Face face)
static FT_Bool	tt_check_single_notdef (FT_Face ttface)
	tt_face_init (FT_Stream stream, FT_Face ttface, FT_Int face_index, FT_Int num_params, FT_Parameter *params)
	tt_face_done (FT_Face ttface)
	tt_size_init (FT_Size ttsize)
	tt_size_done (FT_Size ttsize)
	tt_size_reset (TT_Size size, FT_Bool only_height)
	tt_driver_init (FT_Module ttdriver)
	tt_driver_done (FT_Module ttdriver)
	tt_slot_init (FT_GlyphSlot slot)

Macro Definition Documentation

FT_COMPONENT

#define FT_COMPONENT   trace_ttobjs

Definition at line 46 of file ttobjs.c.

TRICK_NAMES_COUNT

#define TRICK_NAMES_COUNT   23

TRICK_NAMES_MAX_CHARACTERS

#define TRICK_NAMES_MAX_CHARACTERS   19

TRICK_SFNT_ID_cvt

#define TRICK_SFNT_ID_cvt   0

TRICK_SFNT_ID_fpgm

#define TRICK_SFNT_ID_fpgm   1

TRICK_SFNT_ID_prep

#define TRICK_SFNT_ID_prep   2

TRICK_SFNT_IDS_NUM_FACES

#define TRICK_SFNT_IDS_NUM_FACES   26

TRICK_SFNT_IDS_PER_FACE

#define TRICK_SFNT_IDS_PER_FACE   3

Typedef Documentation

tt_sfnt_id_rec

typedef struct tt_sfnt_id_rec_ tt_sfnt_id_rec

Function Documentation

tt_check_single_notdef()

static FT_Bool tt_check_single_notdef ( FT_Face  ttface )

static

Definition at line 505 of file ttobjs.c.

  {
    FT_Bool   result = FALSE;

    TT_Face   face = (TT_Face)ttface;
    FT_UInt   asize;
    FT_ULong  i;
    FT_ULong  glyph_index = 0;
    FT_UInt   count       = 0;


    for( i = 0; i < face->num_locations; i++ )
    {
      tt_face_get_location( face, i, &asize );
      if ( asize > 0 )
      {
        count += 1;
        if ( count > 1 )
          break;
        glyph_index = i;
      }
    }

    /* Only have a single outline. */
    if ( count == 1 )
    {
      if ( glyph_index == 0 )
        result = TRUE;
      else
      {
        /* FIXME: Need to test glyphname == .notdef ? */
        FT_Error error;
        char buf[8];


        error = FT_Get_Glyph_Name( ttface, glyph_index, buf, 8 );
        if ( !error                                            &&
             buf[0] == '.' && !ft_strncmp( buf, ".notdef", 8 ) )
          result = TRUE;
      }
    }

    return result;
  }

Referenced by tt_face_init().

tt_check_trickyness()

static FT_Bool tt_check_trickyness ( FT_Face  face )

static

Definition at line 483 of file ttobjs.c.

  {
    if ( !face )
      return FALSE;

    /* For first, check the face name for quick check. */
    if ( face->family_name                               &&
         tt_check_trickyness_family( face->family_name ) )
      return TRUE;

    /* Type42 fonts may lack `name' tables, we thus try to identify */
    /* tricky fonts by checking the checksums of Type42-persistent  */
    /* sfnt tables (`cvt', `fpgm', and `prep').                     */
    if ( tt_check_trickyness_sfnt_ids( (TT_Face)face ) )
      return TRUE;

    return FALSE;
  }

Referenced by tt_face_init().

tt_check_trickyness_family()

static FT_Bool tt_check_trickyness_family ( FT_String *  name )

static

Definition at line 146 of file ttobjs.c.

  {

#define TRICK_NAMES_MAX_CHARACTERS  19
#define TRICK_NAMES_COUNT           23

    static const char trick_names[TRICK_NAMES_COUNT]
                                 [TRICK_NAMES_MAX_CHARACTERS + 1] =
    {
      /*
         PostScript names are given in brackets if they differ from the
         family name.  The version numbers, together with the copyright or
         release year data, are taken from fonts available to the
         developers.

         Note that later versions of the fonts might be no longer tricky;
         for example, `MingLiU' version 7.00 (file `mingliu.ttc' from
         Windows 7) is an ordinary TTC with non-tricky subfonts.
       */

      "cpop",               /* dftt-p7.ttf; version 1.00, 1992 [DLJGyShoMedium] */
      "DFGirl-W6-WIN-BF",   /* dftt-h6.ttf; version 1.00, 1993 */
      "DFGothic-EB",        /* DynaLab Inc. 1992-1995 */
      "DFGyoSho-Lt",        /* DynaLab Inc. 1992-1995 */
      "DFHSGothic-W5",      /* DynaLab Inc. 1992-1995 */
      "DFHSMincho-W3",      /* DynaLab Inc. 1992-1995 */
      "DFHSMincho-W7",      /* DynaLab Inc. 1992-1995 */
      "DFKaiSho-SB",        /* dfkaisb.ttf */
      "DFKaiShu",
      "DFKai-SB",           /* kaiu.ttf; version 3.00, 1998 [DFKaiShu-SB-Estd-BF] */
      "DLC",                /* dftt-m7.ttf; version 1.00, 1993 [DLCMingBold] */
                            /* dftt-f5.ttf; version 1.00, 1993 [DLCFongSung] */
      "DLCHayMedium",       /* dftt-b5.ttf; version 1.00, 1993 */
      "DLCHayBold",         /* dftt-b7.ttf; version 1.00, 1993 */
      "DLCKaiMedium",       /* dftt-k5.ttf; version 1.00, 1992 */
      "DLCLiShu",           /* dftt-l5.ttf; version 1.00, 1992 */
      "DLCRoundBold",       /* dftt-r7.ttf; version 1.00, 1993 */
      "HuaTianKaiTi?",      /* htkt2.ttf */
      "HuaTianSongTi?",     /* htst3.ttf */
      "Ming(for ISO10646)", /* hkscsiic.ttf; version 0.12, 2007 [Ming] */
                            /* iicore.ttf; version 0.07, 2007 [Ming] */
      "MingLiU",            /* mingliu.ttf */
                            /* mingliu.ttc; version 3.21, 2001 */
      "MingMedium",         /* dftt-m5.ttf; version 1.00, 1993 [DLCMingMedium] */
      "PMingLiU",           /* mingliu.ttc; version 3.21, 2001 */
      "MingLi43",           /* mingli.ttf; version 1.00, 1992 */
    };

    int  nn;


    for ( nn = 0; nn < TRICK_NAMES_COUNT; nn++ )
      if ( ft_strstr( name, trick_names[nn] ) )
        return TRUE;

    return FALSE;
  }

Referenced by tt_check_trickyness().

tt_check_trickyness_sfnt_ids()

static FT_Bool tt_check_trickyness_sfnt_ids ( TT_Face  face )

static

Definition at line 270 of file ttobjs.c.

  {
#define TRICK_SFNT_IDS_PER_FACE   3
#define TRICK_SFNT_IDS_NUM_FACES  26

    static const tt_sfnt_id_rec sfnt_id[TRICK_SFNT_IDS_NUM_FACES]
                                       [TRICK_SFNT_IDS_PER_FACE] = {

#define TRICK_SFNT_ID_cvt   0
#define TRICK_SFNT_ID_fpgm  1
#define TRICK_SFNT_ID_prep  2

      { /* MingLiU 1995 */
        { 0x05BCF058UL, 0x000002E4UL }, /* cvt  */
        { 0x28233BF1UL, 0x000087C4UL }, /* fpgm */
        { 0xA344A1EAUL, 0x000001E1UL }  /* prep */
      },
      { /* MingLiU 1996- */
        { 0x05BCF058UL, 0x000002E4UL }, /* cvt  */
        { 0x28233BF1UL, 0x000087C4UL }, /* fpgm */
        { 0xA344A1EBUL, 0x000001E1UL }  /* prep */
      },
      { /* DFGothic-EB */
        { 0x12C3EBB2UL, 0x00000350UL }, /* cvt  */
        { 0xB680EE64UL, 0x000087A7UL }, /* fpgm */
        { 0xCE939563UL, 0x00000758UL }  /* prep */
      },
      { /* DFGyoSho-Lt */
        { 0x11E5EAD4UL, 0x00000350UL }, /* cvt  */
        { 0xCE5956E9UL, 0x0000BC85UL }, /* fpgm */
        { 0x8272F416UL, 0x00000045UL }  /* prep */
      },
      { /* DFHSGothic-W5 */
        { 0x1262EB4EUL, 0x00000350UL }, /* cvt  */
        { 0xE86A5D64UL, 0x00007940UL }, /* fpgm */
        { 0x7850F729UL, 0x000005FFUL }  /* prep */
      },
      { /* DFHSMincho-W3 */
        { 0x122DEB0AUL, 0x00000350UL }, /* cvt  */
        { 0x3D16328AUL, 0x0000859BUL }, /* fpgm */
        { 0xA93FC33BUL, 0x000002CBUL }  /* prep */
      },
      { /* DFHSMincho-W7 */
        { 0x125FEB26UL, 0x00000350UL }, /* cvt  */
        { 0xA5ACC982UL, 0x00007EE1UL }, /* fpgm */
        { 0x90999196UL, 0x0000041FUL }  /* prep */
      },
      { /* DFKaiShu */
        { 0x11E5EAD4UL, 0x00000350UL }, /* cvt  */
        { 0x5A30CA3BUL, 0x00009063UL }, /* fpgm */
        { 0x13A42602UL, 0x0000007EUL }  /* prep */
      },
      { /* DFKaiShu, variant */
        { 0x11E5EAD4UL, 0x00000350UL }, /* cvt  */
        { 0xA6E78C01UL, 0x00008998UL }, /* fpgm */
        { 0x13A42602UL, 0x0000007EUL }  /* prep */
      },
      { /* DLCLiShu */
        { 0x07DCF546UL, 0x00000308UL }, /* cvt  */
        { 0x40FE7C90UL, 0x00008E2AUL }, /* fpgm */
        { 0x608174B5UL, 0x0000007AUL }  /* prep */
      },
      { /* DLCHayBold */
        { 0xEB891238UL, 0x00000308UL }, /* cvt  */
        { 0xD2E4DCD4UL, 0x0000676FUL }, /* fpgm */
        { 0x8EA5F293UL, 0x000003B8UL }  /* prep */
      },
      { /* HuaTianKaiTi */
        { 0xFFFBFFFCUL, 0x00000008UL }, /* cvt  */
        { 0x9C9E48B8UL, 0x0000BEA2UL }, /* fpgm */
        { 0x70020112UL, 0x00000008UL }  /* prep */
      },
      { /* HuaTianSongTi */
        { 0xFFFBFFFCUL, 0x00000008UL }, /* cvt  */
        { 0x0A5A0483UL, 0x00017C39UL }, /* fpgm */
        { 0x70020112UL, 0x00000008UL }  /* prep */
      },
      { /* NEC fadpop7.ttf */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0x40C92555UL, 0x000000E5UL }, /* fpgm */
        { 0xA39B58E3UL, 0x0000117CUL }  /* prep */
      },
      { /* NEC fadrei5.ttf */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0x33C41652UL, 0x000000E5UL }, /* fpgm */
        { 0x26D6C52AUL, 0x00000F6AUL }  /* prep */
      },
      { /* NEC fangot7.ttf */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0x6DB1651DUL, 0x0000019DUL }, /* fpgm */
        { 0x6C6E4B03UL, 0x00002492UL }  /* prep */
      },
      { /* NEC fangyo5.ttf */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0x40C92555UL, 0x000000E5UL }, /* fpgm */
        { 0xDE51FAD0UL, 0x0000117CUL }  /* prep */
      },
      { /* NEC fankyo5.ttf */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0x85E47664UL, 0x000000E5UL }, /* fpgm */
        { 0xA6C62831UL, 0x00001CAAUL }  /* prep */
      },
      { /* NEC fanrgo5.ttf */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0x2D891CFDUL, 0x0000019DUL }, /* fpgm */
        { 0xA0604633UL, 0x00001DE8UL }  /* prep */
      },
      { /* NEC fangot5.ttc */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0x40AA774CUL, 0x000001CBUL }, /* fpgm */
        { 0x9B5CAA96UL, 0x00001F9AUL }  /* prep */
      },
      { /* NEC fanmin3.ttc */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0x0D3DE9CBUL, 0x00000141UL }, /* fpgm */
        { 0xD4127766UL, 0x00002280UL }  /* prep */
      },
      { /* NEC FA-Gothic, 1996 */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0x4A692698UL, 0x000001F0UL }, /* fpgm */
        { 0x340D4346UL, 0x00001FCAUL }  /* prep */
      },
      { /* NEC FA-Minchou, 1996 */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0xCD34C604UL, 0x00000166UL }, /* fpgm */
        { 0x6CF31046UL, 0x000022B0UL }  /* prep */
      },
      { /* NEC FA-RoundGothicB, 1996 */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0x5DA75315UL, 0x0000019DUL }, /* fpgm */
        { 0x40745A5FUL, 0x000022E0UL }  /* prep */
      },
      { /* NEC FA-RoundGothicM, 1996 */
        { 0x00000000UL, 0x00000000UL }, /* cvt  */
        { 0xF055FC48UL, 0x000001C2UL }, /* fpgm */
        { 0x3900DED3UL, 0x00001E18UL }  /* prep */
      },
        { /* MINGLI.TTF, 1992 */
        { 0x00170003UL, 0x00000060UL }, /* cvt  */
        { 0xDBB4306EUL, 0x000058AAUL }, /* fpgm */
        { 0xD643482AUL, 0x00000035UL }  /* prep */
      }
    };

    FT_ULong   checksum;
    int        num_matched_ids[TRICK_SFNT_IDS_NUM_FACES];
    FT_Bool    has_cvt, has_fpgm, has_prep;
    FT_UShort  i;
    int        j, k;


    FT_MEM_SET( num_matched_ids, 0,
                sizeof ( int ) * TRICK_SFNT_IDS_NUM_FACES );
    has_cvt  = FALSE;
    has_fpgm = FALSE;
    has_prep = FALSE;

    for ( i = 0; i < face->num_tables; i++ )
    {
      checksum = 0;

      switch( face->dir_tables[i].Tag )
      {
      case TTAG_cvt:
        k = TRICK_SFNT_ID_cvt;
        has_cvt  = TRUE;
        break;

      case TTAG_fpgm:
        k = TRICK_SFNT_ID_fpgm;
        has_fpgm = TRUE;
        break;

      case TTAG_prep:
        k = TRICK_SFNT_ID_prep;
        has_prep = TRUE;
        break;

      default:
        continue;
      }

      for ( j = 0; j < TRICK_SFNT_IDS_NUM_FACES; j++ )
        if ( face->dir_tables[i].Length == sfnt_id[j][k].Length )
        {
          if ( !checksum )
            checksum = tt_get_sfnt_checksum( face, i );

          if ( sfnt_id[j][k].CheckSum == checksum )
            num_matched_ids[j]++;

          if ( num_matched_ids[j] == TRICK_SFNT_IDS_PER_FACE )
            return TRUE;
        }
    }

    for ( j = 0; j < TRICK_SFNT_IDS_NUM_FACES; j++ )
    {
      if ( !has_cvt  && !sfnt_id[j][TRICK_SFNT_ID_cvt].Length )
        num_matched_ids[j]++;
      if ( !has_fpgm && !sfnt_id[j][TRICK_SFNT_ID_fpgm].Length )
        num_matched_ids[j]++;
      if ( !has_prep && !sfnt_id[j][TRICK_SFNT_ID_prep].Length )
        num_matched_ids[j]++;
      if ( num_matched_ids[j] == TRICK_SFNT_IDS_PER_FACE )
        return TRUE;
    }

    return FALSE;
  }

Referenced by tt_check_trickyness().

tt_driver_done()

tt_driver_done

(

FT_Module

ttdriver

)

Definition at line 1395 of file ttobjs.c.

  {
    FT_UNUSED( ttdriver );
  }

tt_driver_init()

tt_driver_init

(

FT_Module

ttdriver

)

Definition at line 1358 of file ttobjs.c.

  {

#ifdef TT_USE_BYTECODE_INTERPRETER

    TT_Driver  driver = (TT_Driver)ttdriver;

    driver->interpreter_version = TT_INTERPRETER_VERSION_35;
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY
    driver->interpreter_version = TT_INTERPRETER_VERSION_38;
#endif
#ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL
    driver->interpreter_version = TT_INTERPRETER_VERSION_40;
#endif

#else /* !TT_USE_BYTECODE_INTERPRETER */

    FT_UNUSED( ttdriver );

#endif /* !TT_USE_BYTECODE_INTERPRETER */

    return FT_Err_Ok;
  }

tt_face_done()

tt_face_done

(

FT_Face

ttface

)

Definition at line 740 of file ttobjs.c.

  {
    TT_Face       face = (TT_Face)ttface;
    FT_Memory     memory;
    FT_Stream     stream;
    SFNT_Service  sfnt;


    if ( !face )
      return;

    memory = ttface->memory;
    stream = ttface->stream;
    sfnt   = (SFNT_Service)face->sfnt;

    /* for `extended TrueType formats' (i.e. compressed versions) */
    if ( face->extra.finalizer )
      face->extra.finalizer( face->extra.data );

    if ( sfnt )
      sfnt->done_face( face );

    /* freeing the locations table */
    tt_face_done_loca( face );

    tt_face_free_hdmx( face );

    /* freeing the CVT */
    FT_FREE( face->cvt );
    face->cvt_size = 0;

    /* freeing the programs */
    FT_FRAME_RELEASE( face->font_program );
    FT_FRAME_RELEASE( face->cvt_program );
    face->font_program_size = 0;
    face->cvt_program_size  = 0;

#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
    tt_done_blend( face );
    face->blend = NULL;
#endif
  }

tt_face_init()

tt_face_init	(	FT_Stream	stream,
		FT_Face	ttface,
		FT_Int	face_index,
		FT_Int	num_params,
		FT_Parameter *	params
	)

Definition at line 578 of file ttobjs.c.

  {
    FT_Error      error;
    FT_Library    library;
    SFNT_Service  sfnt;
    TT_Face       face = (TT_Face)ttface;


    FT_TRACE2(( "TTF driver\n" ));

    library = ttface->driver->root.library;

    sfnt = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" );
    if ( !sfnt )
    {
      FT_ERROR(( "tt_face_init: cannot access `sfnt' module\n" ));
      error = FT_THROW( Missing_Module );
      goto Exit;
    }

    /* create input stream from resource */
    if ( FT_STREAM_SEEK( 0 ) )
      goto Exit;

    /* check that we have a valid TrueType file */
    FT_TRACE2(( "  " ));
    error = sfnt->init_face( stream, face, face_index, num_params, params );

    /* Stream may have changed. */
    stream = face->root.stream;

    if ( error )
      goto Exit;

    /* We must also be able to accept Mac/GX fonts, as well as OT ones. */
    /* The 0x00020000 tag is completely undocumented; some fonts from   */
    /* Arphic made for Chinese Windows 3.1 have this.                   */
    if ( face->format_tag != 0x00010000L  && /* MS fonts                             */
         face->format_tag != 0x00020000L  && /* CJK fonts for Win 3.1                */
         face->format_tag != TTAG_true    && /* Mac fonts                            */
         face->format_tag != TTAG_0xA5kbd && /* `Keyboard.dfont' (legacy Mac OS X)   */
         face->format_tag != TTAG_0xA5lst )  /* `LastResort.dfont' (legacy Mac OS X) */
    {
      FT_TRACE2(( "  not a TTF font\n" ));
      goto Bad_Format;
    }

#ifdef TT_USE_BYTECODE_INTERPRETER
    ttface->face_flags |= FT_FACE_FLAG_HINTER;
#endif

    /* If we are performing a simple font format check, exit immediately. */
    if ( face_index < 0 )
      return FT_Err_Ok;

    /* Load font directory */
    error = sfnt->load_face( stream, face, face_index, num_params, params );
    if ( error )
      goto Exit;

    if ( tt_check_trickyness( ttface ) )
      ttface->face_flags |= FT_FACE_FLAG_TRICKY;

    error = tt_face_load_hdmx( face, stream );
    if ( error )
      goto Exit;

    if ( FT_IS_SCALABLE( ttface ) )
    {
#ifdef FT_CONFIG_OPTION_INCREMENTAL
      if ( !ttface->internal->incremental_interface )
#endif
      {
        error = tt_face_load_loca( face, stream );

        /* having a (non-zero) `glyf' table without */
        /* a `loca' table is not valid              */
        if ( face->glyf_len && FT_ERR_EQ( error, Table_Missing ) )
          goto Exit;
        if ( error )
          goto Exit;
      }

      /* `fpgm', `cvt', and `prep' are optional */
      error = tt_face_load_cvt( face, stream );
      if ( error && FT_ERR_NEQ( error, Table_Missing ) )
        goto Exit;

      error = tt_face_load_fpgm( face, stream );
      if ( error && FT_ERR_NEQ( error, Table_Missing ) )
        goto Exit;

      error = tt_face_load_prep( face, stream );
      if ( error && FT_ERR_NEQ( error, Table_Missing ) )
        goto Exit;

      /* Check the scalable flag based on `loca'. */
#ifdef FT_CONFIG_OPTION_INCREMENTAL
      if ( !ttface->internal->incremental_interface )
#endif
      {
        if ( ttface->num_fixed_sizes          &&
             face->glyph_locations            &&
             tt_check_single_notdef( ttface ) )
        {
          FT_TRACE5(( "tt_face_init:"
                      " Only the `.notdef' glyph has an outline.\n"
                      "             "
                      " Resetting scalable flag to FALSE.\n" ));

          ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
        }
      }
    }

#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT

    {
      FT_UInt  instance_index = (FT_UInt)face_index >> 16;


      if ( FT_HAS_MULTIPLE_MASTERS( ttface ) &&
           instance_index > 0                )
      {
        error = TT_Set_Named_Instance( face, instance_index );
        if ( error )
          goto Exit;

        tt_apply_mvar( face );
      }
    }

#endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */

    /* initialize standard glyph loading routines */
    TT_Init_Glyph_Loading( face );

  Exit:
    return error;

  Bad_Format:
    error = FT_THROW( Unknown_File_Format );
    goto Exit;
  }

tt_get_sfnt_checksum()

static FT_ULong tt_get_sfnt_checksum ( TT_Face  face, FT_UShort  i  )

static

Definition at line 239 of file ttobjs.c.

  {
#if 0 /* if we believe the written value, use following part. */
    if ( face->dir_tables[i].CheckSum )
      return face->dir_tables[i].CheckSum;
#endif

    if ( !face->goto_table )
      return 0;

    if ( face->goto_table( face,
                           face->dir_tables[i].Tag,
                           face->root.stream,
                           NULL ) )
      return 0;

    return (FT_ULong)tt_synth_sfnt_checksum( face->root.stream,
                                             face->dir_tables[i].Length );
  }

Referenced by tt_check_trickyness_sfnt_ids().

tt_size_done()

tt_size_done

(

FT_Size

ttsize

)

Definition at line 1221 of file ttobjs.c.

  {
    TT_Size  size = (TT_Size)ttsize;


#ifdef TT_USE_BYTECODE_INTERPRETER
    tt_size_done_bytecode( ttsize );
#endif

    size->ttmetrics.valid = FALSE;
  }

tt_size_init()

tt_size_init

(

FT_Size

ttsize

)

Definition at line 1191 of file ttobjs.c.

  {
    TT_Size   size  = (TT_Size)ttsize;
    FT_Error  error = FT_Err_Ok;


#ifdef TT_USE_BYTECODE_INTERPRETER
    size->bytecode_ready = -1;
    size->cvt_ready      = -1;
#endif

    size->ttmetrics.valid = FALSE;
    size->strike_index    = 0xFFFFFFFFUL;

    return error;
  }

tt_size_reset()

tt_size_reset	(	TT_Size	size,
		FT_Bool	only_height
	)

Definition at line 1251 of file ttobjs.c.

  {
    TT_Face           face;
    FT_Size_Metrics*  size_metrics;


    face = (TT_Face)size->root.face;

    /* nothing to do for CFF2 */
    if ( face->is_cff2 )
      return FT_Err_Ok;

    size->ttmetrics.valid = FALSE;

    size_metrics = &size->hinted_metrics;

    /* copy the result from base layer */
    *size_metrics = size->root.metrics;

    if ( size_metrics->x_ppem < 1 || size_metrics->y_ppem < 1 )
      return FT_THROW( Invalid_PPem );

    /* This bit flag, if set, indicates that the ppems must be       */
    /* rounded to integers.  Nearly all TrueType fonts have this bit */
    /* set, as hinting won't work really well otherwise.             */
    /*                                                               */
    if ( face->header.Flags & 8 )
    {
      /* the TT spec always asks for ROUND, not FLOOR or CEIL */
      size_metrics->ascender = FT_PIX_ROUND(
                                 FT_MulFix( face->root.ascender,
                                            size_metrics->y_scale ) );
      size_metrics->descender = FT_PIX_ROUND(
                                 FT_MulFix( face->root.descender,
                                            size_metrics->y_scale ) );
      size_metrics->height = FT_PIX_ROUND(
                               FT_MulFix( face->root.height,
                                          size_metrics->y_scale ) );
    }

    size->ttmetrics.valid = TRUE;

    if ( only_height )
    {
      /* we must not recompute the scaling values here since       */
      /* `tt_size_reset' was already called (with only_height = 0) */
      return FT_Err_Ok;
    }

    if ( face->header.Flags & 8 )
    {
      /* base scaling values on integer ppem values, */
      /* as mandated by the TrueType specification   */
      size_metrics->x_scale = FT_DivFix( size_metrics->x_ppem << 6,
                                         face->root.units_per_EM );
      size_metrics->y_scale = FT_DivFix( size_metrics->y_ppem << 6,
                                         face->root.units_per_EM );

      size_metrics->max_advance = FT_PIX_ROUND(
                                    FT_MulFix( face->root.max_advance_width,
                                               size_metrics->x_scale ) );
    }

    /* compute new transformation */
    if ( size_metrics->x_ppem >= size_metrics->y_ppem )
    {
      size->ttmetrics.scale   = size_metrics->x_scale;
      size->ttmetrics.ppem    = size_metrics->x_ppem;
      size->ttmetrics.x_ratio = 0x10000L;
      size->ttmetrics.y_ratio = FT_DivFix( size_metrics->y_ppem,
                                           size_metrics->x_ppem );
    }
    else
    {
      size->ttmetrics.scale   = size_metrics->y_scale;
      size->ttmetrics.ppem    = size_metrics->y_ppem;
      size->ttmetrics.x_ratio = FT_DivFix( size_metrics->x_ppem,
                                           size_metrics->y_ppem );
      size->ttmetrics.y_ratio = 0x10000L;
    }

    size->metrics = size_metrics;

#ifdef TT_USE_BYTECODE_INTERPRETER
    size->cvt_ready = -1;
#endif /* TT_USE_BYTECODE_INTERPRETER */

    return FT_Err_Ok;
  }

Referenced by tt_size_request().

tt_slot_init()

tt_slot_init

(

FT_GlyphSlot

slot

)

Definition at line 1416 of file ttobjs.c.

  {
    return FT_GlyphLoader_CreateExtra( slot->internal->loader );
  }

tt_synth_sfnt_checksum()

static FT_UInt32 tt_synth_sfnt_checksum ( FT_Stream  stream, FT_ULong  length  )

static

Definition at line 213 of file ttobjs.c.

  {
    FT_Error   error;
    FT_UInt32  checksum = 0;
    FT_UInt    i;


    if ( FT_FRAME_ENTER( length ) )
      return 0;

    for ( ; length > 3; length -= 4 )
      checksum += (FT_UInt32)FT_GET_ULONG();

    for ( i = 3; length > 0; length--, i-- )
      checksum += (FT_UInt32)FT_GET_BYTE() << ( i * 8 );

    FT_FRAME_EXIT();

    return checksum;
  }

Referenced by tt_get_sfnt_checksum().