Exemple #1
0
  FT_Stream_GetULongLE( FT_Stream  stream )
  {
    FT_Byte*  p;
    FT_Long   result;


    FT_ASSERT( stream && stream->cursor );

    result         = 0;
    p              = stream->cursor;
    if ( p + 3 < stream->limit )
      result       = FT_NEXT_ULONG_LE( p );
    stream->cursor = p;
    return result;
  }
Exemple #2
0
  FT_Stream_ReadULongLE( FT_Stream  stream,
                        FT_Error*  error )
  {
    FT_Byte   reads[4];
    FT_Byte*  p = 0;
    FT_Long   result = 0;


    FT_ASSERT( stream );

    *error = FT_Err_Ok;

    if ( stream->pos + 3 < stream->size )
    {
      if ( stream->read )
      {
        if ( stream->read( stream, stream->pos, reads, 4L ) != 4L )
          goto Fail;

        p = reads;
      }
      else
      {
        p = stream->base + stream->pos;
      }

      if ( p )
        result = FT_NEXT_ULONG_LE( p );
    }
    else
      goto Fail;

    stream->pos += 4;

    return result;

  Fail:
    *error = FT_Err_Invalid_Stream_Operation;
    FT_ERROR(( "FT_Stream_ReadULongLE:"
               " invalid i/o; pos = 0x%lx, size = 0x%lx\n",
               stream->pos, stream->size ));

    return 0;
  }
Exemple #3
0
  FT_Stream_ReadFields( FT_Stream              stream,
                        const FT_Frame_Field*  fields,
                        void*                  structure )
  {
    FT_Error  error;
    FT_Bool   frame_accessed = 0;
    FT_Byte*  cursor = stream->cursor;


    if ( !fields || !stream )
      return FT_Err_Invalid_Argument;

    error = FT_Err_Ok;
    do
    {
      FT_ULong  value;
      FT_Int    sign_shift;
      FT_Byte*  p;


      switch ( fields->value )
      {
      case ft_frame_start:  /* access a new frame */
        error = FT_Stream_EnterFrame( stream, fields->offset );
        if ( error )
          goto Exit;

        frame_accessed = 1;
        cursor         = stream->cursor;
        fields++;
        continue;  /* loop! */

      case ft_frame_bytes:  /* read a byte sequence */
      case ft_frame_skip:   /* skip some bytes      */
        {
          FT_UInt  len = fields->size;


          if ( cursor + len > stream->limit )
          {
            error = FT_Err_Invalid_Stream_Operation;
            goto Exit;
          }

          if ( fields->value == ft_frame_bytes )
          {
            p = (FT_Byte*)structure + fields->offset;
            FT_MEM_COPY( p, cursor, len );
          }
          cursor += len;
          fields++;
          continue;
        }

      case ft_frame_byte:
      case ft_frame_schar:  /* read a single byte */
        value = FT_NEXT_BYTE(cursor);
        sign_shift = 24;
        break;

      case ft_frame_short_be:
      case ft_frame_ushort_be:  /* read a 2-byte big-endian short */
        value = FT_NEXT_USHORT(cursor);
        sign_shift = 16;
        break;

      case ft_frame_short_le:
      case ft_frame_ushort_le:  /* read a 2-byte little-endian short */
        value = FT_NEXT_USHORT_LE(cursor);
        sign_shift = 16;
        break;

      case ft_frame_long_be:
      case ft_frame_ulong_be:  /* read a 4-byte big-endian long */
        value = FT_NEXT_ULONG(cursor);
        sign_shift = 0;
        break;

      case ft_frame_long_le:
      case ft_frame_ulong_le:  /* read a 4-byte little-endian long */
        value = FT_NEXT_ULONG_LE(cursor);
        sign_shift = 0;
        break;

      case ft_frame_off3_be:
      case ft_frame_uoff3_be:  /* read a 3-byte big-endian long */
        value = FT_NEXT_UOFF3(cursor);
        sign_shift = 8;
        break;

      case ft_frame_off3_le:
      case ft_frame_uoff3_le:  /* read a 3-byte little-endian long */
        value = FT_NEXT_UOFF3_LE(cursor);
        sign_shift = 8;
        break;

      default:
        /* otherwise, exit the loop */
        stream->cursor = cursor;
        goto Exit;
      }

      /* now, compute the signed value is necessary */
      if ( fields->value & FT_FRAME_OP_SIGNED )
        value = (FT_ULong)( (FT_Int32)( value << sign_shift ) >> sign_shift );

      /* finally, store the value in the object */

      p = (FT_Byte*)structure + fields->offset;
      switch ( fields->size )
      {
      case (8 / FT_CHAR_BIT):
        *(FT_Byte*)p = (FT_Byte)value;
        break;

      case (16 / FT_CHAR_BIT):
        *(FT_UShort*)p = (FT_UShort)value;
        break;

      case (32 / FT_CHAR_BIT):
        *(FT_UInt32*)p = (FT_UInt32)value;
        break;

      default:  /* for 64-bit systems */
        *(FT_ULong*)p = (FT_ULong)value;
      }

      /* go to next field */
      fields++;
    }
    while ( 1 );

  Exit:
    /* close the frame if it was opened by this read */
    if ( frame_accessed )
      FT_Stream_ExitFrame( stream );

    return error;
  }
Exemple #4
0
static FT_Error
FNT_Load_Glyph( FT_GlyphSlot  slot,
                FT_Size       size,
                FT_UInt       glyph_index,
                FT_Int32      load_flags )
{
    FNT_Face    face   = (FNT_Face)FT_SIZE_FACE( size );
    FNT_Font    font   = face->font;
    FT_Error    error  = FNT_Err_Ok;
    FT_Byte*    p;
    FT_Int      len;
    FT_Bitmap*  bitmap = &slot->bitmap;
    FT_ULong    offset;
    FT_Bool     new_format;

    FT_UNUSED( load_flags );


    if ( !face || !font )
    {
        error = FNT_Err_Invalid_Argument;
        goto Exit;
    }

    if ( glyph_index > 0 )
        glyph_index--;                           /* revert to real index */
    else
        glyph_index = font->header.default_char; /* the .notdef glyph */

    new_format = FT_BOOL( font->header.version == 0x300 );
    len        = new_format ? 6 : 4;

    /* jump to glyph entry */
    p = font->fnt_frame + ( new_format ? 146 : 118 ) + len * glyph_index;

    bitmap->width = FT_NEXT_SHORT_LE( p );

    if ( new_format )
        offset = FT_NEXT_ULONG_LE( p );
    else
        offset = FT_NEXT_USHORT_LE( p );

    /* jump to glyph data */
    p = font->fnt_frame + /* font->header.bits_offset */ + offset;

    /* allocate and build bitmap */
    {
        FT_Memory  memory = FT_FACE_MEMORY( slot->face );
        FT_Int     pitch  = ( bitmap->width + 7 ) >> 3;
        FT_Byte*   column;
        FT_Byte*   write;


        bitmap->pitch      = pitch;
        bitmap->rows       = font->header.pixel_height;
        bitmap->pixel_mode = FT_PIXEL_MODE_MONO;

        /* note: since glyphs are stored in columns and not in rows we */
        /*       can't use ft_glyphslot_set_bitmap                     */
        if ( FT_ALLOC( bitmap->buffer, pitch * bitmap->rows ) )
            goto Exit;

        column = (FT_Byte*)bitmap->buffer;

        for ( ; pitch > 0; pitch--, column++ )
        {
            FT_Byte*  limit = p + bitmap->rows;


            for ( write = column; p < limit; p++, write += bitmap->pitch )
                *write = *p;
        }
    }

    slot->internal->flags = FT_GLYPH_OWN_BITMAP;
    slot->bitmap_left     = 0;
    slot->bitmap_top      = font->header.ascent;
    slot->format          = FT_GLYPH_FORMAT_BITMAP;

    /* now set up metrics */
    slot->metrics.horiAdvance  = bitmap->width << 6;
    slot->metrics.horiBearingX = 0;
    slot->metrics.horiBearingY = slot->bitmap_top << 6;

    slot->linearHoriAdvance    = (FT_Fixed)bitmap->width << 16;
    slot->format               = FT_GLYPH_FORMAT_BITMAP;

Exit:
    return error;
}
Exemple #5
0
  static FT_Error
  FNT_Load_Glyph( FT_GlyphSlot  slot,
                  FNT_Size      size,
                  FT_UInt       glyph_index,
                  FT_Int        load_flags )
  {
    FNT_Font    font  = size->font;
    FT_Error    error = 0;
    FT_Byte*    p;
    FT_Int      len;
    FT_Bitmap*  bitmap = &slot->bitmap;
    FT_ULong    offset;
    FT_Bool     new_format;

    FT_UNUSED( slot );
    FT_UNUSED( load_flags );


    if ( !font )
    {
      error = FNT_Err_Invalid_Argument;
      goto Exit;
    }

    if ( glyph_index > 0 )
      glyph_index--;
    else
      glyph_index = font->header.default_char - font->header.first_char;

    new_format = FT_BOOL( font->header.version == 0x300 );
    len        = new_format ? 6 : 4;

    /* jump to glyph entry */
    p = font->fnt_frame + 118 + len * glyph_index;

    bitmap->width = FT_NEXT_SHORT_LE( p );

    if ( new_format )
      offset = FT_NEXT_ULONG_LE( p );
    else
      offset = FT_NEXT_USHORT_LE( p );

    /* jump to glyph data */
    p = font->fnt_frame + /* font->header.bits_offset */ + offset;

    /* allocate and build bitmap */
    {
      FT_Memory  memory = FT_FACE_MEMORY( slot->face );
      FT_Int     pitch  = ( bitmap->width + 7 ) >> 3;
      FT_Byte*   column;
      FT_Byte*   write;


      bitmap->pitch      = pitch;
      bitmap->rows       = font->header.pixel_height;
      bitmap->pixel_mode = ft_pixel_mode_mono;

      if ( FT_ALLOC( bitmap->buffer, pitch * bitmap->rows ) )
        goto Exit;

      column = (FT_Byte*)bitmap->buffer;

      for ( ; pitch > 0; pitch--, column++ )
      {
        FT_Byte*  limit = p + bitmap->rows;


        for ( write = column; p < limit; p++, write += bitmap->pitch )
          write[0] = p[0];
      }
    }

    slot->flags       = FT_GLYPH_OWN_BITMAP;
    slot->bitmap_left = 0;
    slot->bitmap_top  = font->header.ascent;
    slot->format      = ft_glyph_format_bitmap;

    /* now set up metrics */
    slot->metrics.horiAdvance  = bitmap->width << 6;
    slot->metrics.horiBearingX = 0;
    slot->metrics.horiBearingY = slot->bitmap_top << 6;

    slot->linearHoriAdvance    = (FT_Fixed)bitmap->width << 16;
    slot->format               = ft_glyph_format_bitmap;

  Exit:
    return error;
  }