static FT_Error
FNT_Size_Set_Pixels( FNT_Size size )
{
/* look up a font corresponding to the current pixel size */
FNT_Face face = (FNT_Face)FT_SIZE_FACE( size );
FNT_Font* cur = face->fonts;
FNT_Font* limit = cur + face->num_fonts;
size->font = 0;
for ( ; cur < limit; cur++ )
{
/* we only compare the character height, as fonts used some strange */
/* values */
if ( cur->header.pixel_height == size->root.metrics.y_ppem )
{
size->font = cur;
size->root.metrics.ascender = cur->header.ascent * 64;
size->root.metrics.descender = ( cur->header.pixel_height -
cur->header.ascent ) * 64;
size->root.metrics.height = cur->header.pixel_height * 64;
break;
}
}
return ( size->font ? FNT_Err_Ok : FNT_Err_Invalid_Pixel_Size );
}
static FT_Error
PCF_Set_Pixel_Size( FT_Size size )
{
PCF_Face face = (PCF_Face)FT_SIZE_FACE( size );
FT_TRACE4(( "rec %d - pres %d\n", size->metrics.y_ppem,
face->root.available_sizes->height ));
if ( size->metrics.y_ppem == face->root.available_sizes->height )
{
size->metrics.ascender = face->accel.fontAscent << 6;
size->metrics.descender = face->accel.fontDescent * (-64);
#if 0
size->metrics.height = face->accel.maxbounds.ascent << 6;
#endif
size->metrics.height = size->metrics.ascender -
size->metrics.descender;
size->metrics.max_advance = face->accel.maxbounds.characterWidth << 6;
return PCF_Err_Ok;
}
else
{
FT_TRACE4(( "size WRONG\n" ));
return PCF_Err_Invalid_Pixel_Size;
}
}
static FT_Error
FNT_Size_Set_Pixels( FT_Size size )
{
FNT_Face face = (FNT_Face)FT_SIZE_FACE( size );
FT_Face root = FT_FACE( face );
if ( size->metrics.y_ppem == root->available_sizes->height )
{
FNT_Font font = face->font;
size->metrics.ascender = font->header.ascent * 64;
size->metrics.descender = ( font->header.pixel_height -
font->header.ascent ) * 64;
size->metrics.height = font->header.pixel_height * 64;
size->metrics.max_advance = font->header.max_width * 64;
return FNT_Err_Ok;
}
else
return FNT_Err_Invalid_Pixel_Size;
}
static FT_Error
PCF_Glyph_Load( FT_GlyphSlot slot,
FT_Size size,
FT_UInt glyph_index,
FT_Int32 load_flags )
{
PCF_Face face = (PCF_Face)FT_SIZE_FACE( size );
FT_Stream stream = face->root.stream;
FT_Error error = PCF_Err_Ok;
FT_Bitmap* bitmap = &slot->bitmap;
PCF_Metric metric;
int bytes;
FT_UNUSED( load_flags );
FT_TRACE4(( "load_glyph %d ---", glyph_index ));
if ( !face )
{
error = PCF_Err_Invalid_Argument;
goto Exit;
}
if ( glyph_index > 0 )
glyph_index--;
metric = face->metrics + glyph_index;
bitmap->rows = metric->ascent + metric->descent;
bitmap->width = metric->rightSideBearing - metric->leftSideBearing;
bitmap->num_grays = 1;
bitmap->pixel_mode = FT_PIXEL_MODE_MONO;
FT_TRACE6(( "BIT_ORDER %d ; BYTE_ORDER %d ; GLYPH_PAD %d\n",
PCF_BIT_ORDER( face->bitmapsFormat ),
PCF_BYTE_ORDER( face->bitmapsFormat ),
PCF_GLYPH_PAD( face->bitmapsFormat ) ));
switch ( PCF_GLYPH_PAD( face->bitmapsFormat ) )
{
case 1:
bitmap->pitch = ( bitmap->width + 7 ) >> 3;
break;
case 2:
bitmap->pitch = ( ( bitmap->width + 15 ) >> 4 ) << 1;
break;
case 4:
bitmap->pitch = ( ( bitmap->width + 31 ) >> 5 ) << 2;
break;
case 8:
bitmap->pitch = ( ( bitmap->width + 63 ) >> 6 ) << 3;
break;
default:
return PCF_Err_Invalid_File_Format;
}
/* XXX: to do: are there cases that need repadding the bitmap? */
bytes = bitmap->pitch * bitmap->rows;
error = ft_glyphslot_alloc_bitmap( slot, bytes );
if ( error )
goto Exit;
if ( FT_STREAM_SEEK( metric->bits ) ||
FT_STREAM_READ( bitmap->buffer, bytes ) )
goto Exit;
if ( PCF_BIT_ORDER( face->bitmapsFormat ) != MSBFirst )
BitOrderInvert( bitmap->buffer, bytes );
if ( ( PCF_BYTE_ORDER( face->bitmapsFormat ) !=
PCF_BIT_ORDER( face->bitmapsFormat ) ) )
{
switch ( PCF_SCAN_UNIT( face->bitmapsFormat ) )
{
case 1:
break;
case 2:
TwoByteSwap( bitmap->buffer, bytes );
break;
case 4:
FourByteSwap( bitmap->buffer, bytes );
break;
}
}
slot->bitmap_left = metric->leftSideBearing;
slot->bitmap_top = metric->ascent;
slot->metrics.horiAdvance = metric->characterWidth << 6;
slot->metrics.horiBearingX = metric->leftSideBearing << 6;
slot->metrics.horiBearingY = metric->ascent << 6;
slot->metrics.width = ( metric->rightSideBearing -
metric->leftSideBearing ) << 6;
slot->metrics.height = bitmap->rows << 6;
slot->linearHoriAdvance = (FT_Fixed)bitmap->width << 16;
slot->format = FT_GLYPH_FORMAT_BITMAP;
FT_TRACE4(( " --- ok\n" ));
Exit:
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;
}
