FT_Stream_GetUShortLE( FT_Stream stream )
{
FT_Byte* p;
FT_Short result;
FT_ASSERT( stream && stream->cursor );
result = 0;
p = stream->cursor;
if ( p + 1 < stream->limit )
result = FT_NEXT_USHORT_LE( p );
stream->cursor = p;
return result;
}
FT_Stream_ReadUShortLE( FT_Stream stream,
FT_Error* error )
{
FT_Byte reads[2];
FT_Byte* p = 0;
FT_Short result = 0;
FT_ASSERT( stream );
*error = FT_Err_Ok;
if ( stream->pos + 1 < stream->size )
{
if ( stream->read )
{
if ( stream->read( stream, stream->pos, reads, 2L ) != 2L )
goto Fail;
p = reads;
}
else
{
p = stream->base + stream->pos;
}
if ( p )
result = FT_NEXT_USHORT_LE( p );
}
else
goto Fail;
stream->pos += 2;
return result;
Fail:
*error = FT_Err_Invalid_Stream_Operation;
FT_ERROR(( "FT_Stream_ReadUShortLE:"
" invalid i/o; pos = 0x%lx, size = 0x%lx\n",
stream->pos, stream->size ));
return 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;
}
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;
}
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;
}