/***************************************************************************/ /* */ /* winfnt.c */ /* */ /* FreeType font driver for Windows FNT/FON files */ /* */ /* Copyright 1996-2001, 2002, 2003, 2004, 2006 by */ /* 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. */ /* */ /***************************************************************************/ #include #include FT_WINFONTS_H #include FT_INTERNAL_DEBUG_H #include FT_INTERNAL_STREAM_H #include FT_INTERNAL_OBJECTS_H #include "winfnt.h" #include "fnterrs.h" #include FT_SERVICE_WINFNT_H #include FT_SERVICE_XFREE86_NAME_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 trace_winfnt static const FT_Frame_Field winmz_header_fields[] = { #undef FT_STRUCTURE #define FT_STRUCTURE WinMZ_HeaderRec FT_FRAME_START( 64 ), FT_FRAME_USHORT_LE ( magic ), FT_FRAME_SKIP_BYTES( 29 * 2 ), FT_FRAME_ULONG_LE ( lfanew ), FT_FRAME_END }; static const FT_Frame_Field winne_header_fields[] = { #undef FT_STRUCTURE #define FT_STRUCTURE WinNE_HeaderRec FT_FRAME_START( 40 ), FT_FRAME_USHORT_LE ( magic ), FT_FRAME_SKIP_BYTES( 34 ), FT_FRAME_USHORT_LE ( resource_tab_offset ), FT_FRAME_USHORT_LE ( rname_tab_offset ), FT_FRAME_END }; static const FT_Frame_Field winfnt_header_fields[] = { #undef FT_STRUCTURE #define FT_STRUCTURE FT_WinFNT_HeaderRec FT_FRAME_START( 148 ), FT_FRAME_USHORT_LE( version ), FT_FRAME_ULONG_LE ( file_size ), FT_FRAME_BYTES ( copyright, 60 ), FT_FRAME_USHORT_LE( file_type ), FT_FRAME_USHORT_LE( nominal_point_size ), FT_FRAME_USHORT_LE( vertical_resolution ), FT_FRAME_USHORT_LE( horizontal_resolution ), FT_FRAME_USHORT_LE( ascent ), FT_FRAME_USHORT_LE( internal_leading ), FT_FRAME_USHORT_LE( external_leading ), FT_FRAME_BYTE ( italic ), FT_FRAME_BYTE ( underline ), FT_FRAME_BYTE ( strike_out ), FT_FRAME_USHORT_LE( weight ), FT_FRAME_BYTE ( charset ), FT_FRAME_USHORT_LE( pixel_width ), FT_FRAME_USHORT_LE( pixel_height ), FT_FRAME_BYTE ( pitch_and_family ), FT_FRAME_USHORT_LE( avg_width ), FT_FRAME_USHORT_LE( max_width ), FT_FRAME_BYTE ( first_char ), FT_FRAME_BYTE ( last_char ), FT_FRAME_BYTE ( default_char ), FT_FRAME_BYTE ( break_char ), FT_FRAME_USHORT_LE( bytes_per_row ), FT_FRAME_ULONG_LE ( device_offset ), FT_FRAME_ULONG_LE ( face_name_offset ), FT_FRAME_ULONG_LE ( bits_pointer ), FT_FRAME_ULONG_LE ( bits_offset ), FT_FRAME_BYTE ( reserved ), FT_FRAME_ULONG_LE ( flags ), FT_FRAME_USHORT_LE( A_space ), FT_FRAME_USHORT_LE( B_space ), FT_FRAME_USHORT_LE( C_space ), FT_FRAME_ULONG_LE ( color_table_offset ), FT_FRAME_BYTES ( reserved1, 16 ), FT_FRAME_END }; static void fnt_font_done( FNT_Face face ) { FT_Memory memory = FT_FACE( face )->memory; FT_Stream stream = FT_FACE( face )->stream; FNT_Font font = face->font; if ( !font ) return; if ( font->fnt_frame ) FT_FRAME_RELEASE( font->fnt_frame ); FT_FREE( font->family_name ); FT_FREE( font ); face->font = 0; } static FT_Error fnt_font_load( FNT_Font font, FT_Stream stream ) { FT_Error error; FT_WinFNT_Header header = &font->header; FT_Bool new_format; FT_UInt size; /* first of all, read the FNT header */ if ( FT_STREAM_SEEK( font->offset ) || FT_STREAM_READ_FIELDS( winfnt_header_fields, header ) ) goto Exit; /* check header */ if ( header->version != 0x200 && header->version != 0x300 ) { FT_TRACE2(( "[not a valid FNT file]\n" )); error = FNT_Err_Unknown_File_Format; goto Exit; } new_format = FT_BOOL( font->header.version == 0x300 ); size = new_format ? 148 : 118; if ( header->file_size < size ) { FT_TRACE2(( "[not a valid FNT file]\n" )); error = FNT_Err_Unknown_File_Format; goto Exit; } /* Version 2 doesn't have these fields */ if ( header->version == 0x200 ) { header->flags = 0; header->A_space = 0; header->B_space = 0; header->C_space = 0; header->color_table_offset = 0; } if ( header->file_type & 1 ) { FT_TRACE2(( "[can't handle vector FNT fonts]\n" )); error = FNT_Err_Unknown_File_Format; goto Exit; } /* this is a FNT file/table; extract its frame */ if ( FT_STREAM_SEEK( font->offset ) || FT_FRAME_EXTRACT( header->file_size, font->fnt_frame ) ) goto Exit; Exit: return error; } static FT_Error fnt_face_get_dll_font( FNT_Face face, FT_Int face_index ) { FT_Error error; FT_Stream stream = FT_FACE( face )->stream; FT_Memory memory = FT_FACE( face )->memory; WinMZ_HeaderRec mz_header; face->font = 0; /* does it begin with an MZ header? */ if ( FT_STREAM_SEEK( 0 ) || FT_STREAM_READ_FIELDS( winmz_header_fields, &mz_header ) ) goto Exit; error = FNT_Err_Unknown_File_Format; if ( mz_header.magic == WINFNT_MZ_MAGIC ) { /* yes, now look for an NE header in the file */ WinNE_HeaderRec ne_header; if ( FT_STREAM_SEEK( mz_header.lfanew ) || FT_STREAM_READ_FIELDS( winne_header_fields, &ne_header ) ) goto Exit; error = FNT_Err_Unknown_File_Format; if ( ne_header.magic == WINFNT_NE_MAGIC ) { /* good, now look into the resource table for each FNT resource */ FT_ULong res_offset = mz_header.lfanew + ne_header.resource_tab_offset; FT_UShort size_shift; FT_UShort font_count = 0; FT_ULong font_offset = 0; if ( FT_STREAM_SEEK( res_offset ) || FT_FRAME_ENTER( ne_header.rname_tab_offset - ne_header.resource_tab_offset ) ) goto Exit; size_shift = FT_GET_USHORT_LE(); for (;;) { FT_UShort type_id, count; type_id = FT_GET_USHORT_LE(); if ( !type_id ) break; count = FT_GET_USHORT_LE(); if ( type_id == 0x8008U ) { font_count = count; font_offset = (FT_ULong)( FT_STREAM_POS() + 4 + ( stream->cursor - stream->limit ) ); break; } stream->cursor += 4 + count * 12; } FT_FRAME_EXIT(); if ( !font_count || !font_offset ) { FT_TRACE2(( "this file doesn't contain any FNT resources!\n" )); error = FNT_Err_Unknown_File_Format; goto Exit; } face->root.num_faces = font_count; if ( face_index >= font_count ) { error = FNT_Err_Bad_Argument; goto Exit; } if ( FT_NEW( face->font ) ) goto Exit; if ( FT_STREAM_SEEK( font_offset + face_index * 12 ) || FT_FRAME_ENTER( 12 ) ) goto Fail; face->font->offset = (FT_ULong)FT_GET_USHORT_LE() << size_shift; face->font->fnt_size = (FT_ULong)FT_GET_USHORT_LE() << size_shift; face->font->size_shift = size_shift; stream->cursor += 8; FT_FRAME_EXIT(); error = fnt_font_load( face->font, stream ); } } Fail: if ( error ) fnt_font_done( face ); Exit: return error; } typedef struct FNT_CMapRec_ { FT_CMapRec cmap; FT_UInt32 first; FT_UInt32 count; } FNT_CMapRec, *FNT_CMap; static FT_Error fnt_cmap_init( FNT_CMap cmap ) { FNT_Face face = (FNT_Face)FT_CMAP_FACE( cmap ); FNT_Font font = face->font; cmap->first = (FT_UInt32) font->header.first_char; cmap->count = (FT_UInt32)( font->header.last_char - cmap->first + 1 ); return 0; } static FT_UInt fnt_cmap_char_index( FNT_CMap cmap, FT_UInt32 char_code ) { FT_UInt gindex = 0; char_code -= cmap->first; if ( char_code < cmap->count ) gindex = char_code + 1; /* we artificially increase the glyph index; */ /* FNT_Load_Glyph reverts to the right one */ return gindex; } static FT_UInt fnt_cmap_char_next( FNT_CMap cmap, FT_UInt32 *pchar_code ) { FT_UInt gindex = 0; FT_UInt32 result = 0; FT_UInt32 char_code = *pchar_code + 1; if ( char_code <= cmap->first ) { result = cmap->first; gindex = 1; } else { char_code -= cmap->first; if ( char_code < cmap->count ) { result = cmap->first + char_code; gindex = char_code + 1; } } *pchar_code = result; return gindex; } static const FT_CMap_ClassRec fnt_cmap_class_rec = { sizeof ( FNT_CMapRec ), (FT_CMap_InitFunc) fnt_cmap_init, (FT_CMap_DoneFunc) NULL, (FT_CMap_CharIndexFunc)fnt_cmap_char_index, (FT_CMap_CharNextFunc) fnt_cmap_char_next }; static FT_CMap_Class const fnt_cmap_class = &fnt_cmap_class_rec; static void FNT_Face_Done( FNT_Face face ) { FT_Memory memory = FT_FACE_MEMORY( face ); fnt_font_done( face ); FT_FREE( face->root.available_sizes ); face->root.num_fixed_sizes = 0; } static FT_Error FNT_Face_Init( FT_Stream stream, FNT_Face face, FT_Int face_index, FT_Int num_params, FT_Parameter* params ) { FT_Error error; FT_Memory memory = FT_FACE_MEMORY( face ); FT_UNUSED( num_params ); FT_UNUSED( params ); /* try to load font from a DLL */ error = fnt_face_get_dll_font( face, face_index ); if ( error ) { /* this didn't work; try to load a single FNT font */ FNT_Font font; if ( FT_NEW( face->font ) ) goto Exit; face->root.num_faces = 1; font = face->font; font->offset = 0; font->fnt_size = stream->size; error = fnt_font_load( font, stream ); if ( error ) goto Fail; } /* we now need to fill the root FT_Face fields */ /* with relevant information */ { FT_Face root = FT_FACE( face ); FNT_Font font = face->font; FT_PtrDist family_size; root->face_flags = FT_FACE_FLAG_FIXED_SIZES | FT_FACE_FLAG_HORIZONTAL; if ( font->header.avg_width == font->header.max_width ) root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH; if ( font->header.italic ) root->style_flags |= FT_STYLE_FLAG_ITALIC; if ( font->header.weight >= 800 ) root->style_flags |= FT_STYLE_FLAG_BOLD; /* set up the `fixed_sizes' array */ if ( FT_NEW_ARRAY( root->available_sizes, 1 ) ) goto Fail; root->num_fixed_sizes = 1; { FT_Bitmap_Size* bsize = root->available_sizes; FT_UShort x_res, y_res; bsize->width = font->header.avg_width; bsize->height = (FT_Short)( font->header.pixel_height + font->header.external_leading ); bsize->size = font->header.nominal_point_size << 6; x_res = font->header.horizontal_resolution; if ( !x_res ) x_res = 72; y_res = font->header.vertical_resolution; if ( !y_res ) y_res = 72; bsize->y_ppem = FT_MulDiv( bsize->size, y_res, 72 ); bsize->y_ppem = FT_PIX_ROUND( bsize->y_ppem ); /* * this reads: * * the nominal height is larger than the bbox's height * * => nominal_point_size contains incorrect value; * use pixel_height as the nominal height */ if ( bsize->y_ppem > font->header.pixel_height << 6 ) { FT_TRACE2(( "use pixel_height as the nominal height\n" )); bsize->y_ppem = font->header.pixel_height << 6; bsize->size = FT_MulDiv( bsize->y_ppem, 72, y_res ); } bsize->x_ppem = FT_MulDiv( bsize->size, x_res, 72 ); bsize->x_ppem = FT_PIX_ROUND( bsize->x_ppem ); } { FT_CharMapRec charmap; charmap.encoding = FT_ENCODING_NONE; charmap.platform_id = 0; charmap.encoding_id = 0; charmap.face = root; if ( font->header.charset == FT_WinFNT_ID_MAC ) { charmap.encoding = FT_ENCODING_APPLE_ROMAN; charmap.platform_id = 1; /* charmap.encoding_id = 0; */ } error = FT_CMap_New( fnt_cmap_class, NULL, &charmap, NULL ); if ( error ) goto Fail; /* Select default charmap */ if ( root->num_charmaps ) root->charmap = root->charmaps[0]; } /* setup remaining flags */ /* reserve one slot for the .notdef glyph at index 0 */ root->num_glyphs = font->header.last_char - font->header.first_char + 1 + 1; /* Some broken fonts don't delimit the face name with a final */ /* NULL byte -- the frame is erroneously one byte too small. */ /* We thus allocate one more byte, setting it explicitly to */ /* zero. */ family_size = font->header.file_size - font->header.face_name_offset; if ( FT_ALLOC( font->family_name, family_size + 1 ) ) goto Fail; FT_MEM_COPY( font->family_name, font->fnt_frame + font->header.face_name_offset, family_size ); font->family_name[family_size] = '\0'; if ( FT_REALLOC( font->family_name, family_size, ft_strlen( font->family_name ) + 1 ) ) goto Fail; root->family_name = font->family_name; root->style_name = (char *)"Regular"; if ( root->style_flags & FT_STYLE_FLAG_BOLD ) { if ( root->style_flags & FT_STYLE_FLAG_ITALIC ) root->style_name = (char *)"Bold Italic"; else root->style_name = (char *)"Bold"; } else if ( root->style_flags & FT_STYLE_FLAG_ITALIC ) root->style_name = (char *)"Italic"; } goto Exit; Fail: FNT_Face_Done( face ); Exit: return error; } static FT_Error FNT_Size_Select( FT_Size size ) { FNT_Face face = (FNT_Face)size->face; FT_WinFNT_Header header = &face->font->header; FT_Select_Metrics( size->face, 0 ); size->metrics.ascender = header->ascent * 64; size->metrics.descender = -( header->pixel_height - header->ascent ) * 64; size->metrics.max_advance = header->max_width * 64; return FNT_Err_Ok; } static FT_Error FNT_Size_Request( FT_Size size, FT_Size_Request req ) { FNT_Face face = (FNT_Face)size->face; FT_WinFNT_Header header = &face->font->header; FT_Bitmap_Size* bsize = size->face->available_sizes; FT_Error error = FNT_Err_Invalid_Pixel_Size; FT_Long height; height = FT_REQUEST_HEIGHT( req ); height = ( height + 32 ) >> 6; switch ( req->type ) { case FT_SIZE_REQUEST_TYPE_NOMINAL: if ( height == ( bsize->y_ppem + 32 ) >> 6 ) error = FNT_Err_Ok; break; case FT_SIZE_REQUEST_TYPE_REAL_DIM: if ( height == header->pixel_height ) error = FNT_Err_Ok; break; default: error = FNT_Err_Unimplemented_Feature; break; } if ( error ) return error; else return FNT_Size_Select( size ); } 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 ? 148 : 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 ); if ( offset >= font->header.file_size ) { FT_TRACE2(( "invalid FNT offset!\n" )); error = FNT_Err_Invalid_File_Format; goto Exit; } /* 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.width = bitmap->width << 6; slot->metrics.height = bitmap->rows << 6; slot->metrics.horiAdvance = bitmap->width << 6; slot->metrics.horiBearingX = 0; slot->metrics.horiBearingY = slot->bitmap_top << 6; ft_synthesize_vertical_metrics( &slot->metrics, bitmap->rows << 6 ); Exit: return error; } static FT_Error winfnt_get_header( FT_Face face, FT_WinFNT_HeaderRec *aheader ) { FNT_Font font = ((FNT_Face)face)->font; *aheader = font->header; return 0; } static const FT_Service_WinFntRec winfnt_service_rec = { winfnt_get_header }; /* * SERVICE LIST * */ static const FT_ServiceDescRec winfnt_services[] = { { FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_WINFNT }, { FT_SERVICE_ID_WINFNT, &winfnt_service_rec }, { NULL, NULL } }; static FT_Module_Interface winfnt_get_service( FT_Driver driver, const FT_String* service_id ) { FT_UNUSED( driver ); return ft_service_list_lookup( winfnt_services, service_id ); } FT_CALLBACK_TABLE_DEF const FT_Driver_ClassRec winfnt_driver_class = { { FT_MODULE_FONT_DRIVER | FT_MODULE_DRIVER_NO_OUTLINES, sizeof ( FT_DriverRec ), "winfonts", 0x10000L, 0x20000L, 0, (FT_Module_Constructor)0, (FT_Module_Destructor) 0, (FT_Module_Requester) winfnt_get_service }, sizeof( FNT_FaceRec ), sizeof( FT_SizeRec ), sizeof( FT_GlyphSlotRec ), (FT_Face_InitFunc) FNT_Face_Init, (FT_Face_DoneFunc) FNT_Face_Done, (FT_Size_InitFunc) 0, (FT_Size_DoneFunc) 0, (FT_Slot_InitFunc) 0, (FT_Slot_DoneFunc) 0, #ifdef FT_CONFIG_OPTION_OLD_INTERNALS ft_stub_set_char_sizes, ft_stub_set_pixel_sizes, #endif (FT_Slot_LoadFunc) FNT_Load_Glyph, (FT_Face_GetKerningFunc) 0, (FT_Face_AttachFunc) 0, (FT_Face_GetAdvancesFunc) 0, (FT_Size_RequestFunc) FNT_Size_Request, (FT_Size_SelectFunc) FNT_Size_Select }; /* END */