| /***************************************************************************/ |
| /* */ |
| /* winfnt.c */ |
| /* */ |
| /* FreeType font driver for Windows FNT/FON files */ |
| /* */ |
| /* Copyright 1996-2001 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 <ft2build.h> |
| #include FT_INTERNAL_DEBUG_H |
| #include FT_INTERNAL_STREAM_H |
| #include FT_INTERNAL_OBJECTS_H |
| #include FT_INTERNAL_FNT_TYPES_H |
| |
| #include "winfnt.h" |
| |
| #include "fnterrs.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_Header |
| |
| 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_Header |
| |
| 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 WinFNT_Header |
| |
| FT_FRAME_START( 134 ), |
| 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_USHORT_LE( color_table_offset ), |
| FT_FRAME_BYTES ( reserved, 4 ), |
| FT_FRAME_END |
| }; |
| |
| |
| static void |
| fnt_font_done( FNT_Font* font, |
| FT_Stream stream ) |
| { |
| if ( font->fnt_frame ) |
| RELEASE_Frame( font->fnt_frame ); |
| |
| font->fnt_size = 0; |
| font->fnt_frame = 0; |
| } |
| |
| |
| static FT_Error |
| fnt_font_load( FNT_Font* font, |
| FT_Stream stream ) |
| { |
| FT_Error error; |
| WinFNT_Header* header = &font->header; |
| |
| |
| /* first of all, read the FNT header */ |
| if ( FILE_Seek( font->offset ) || |
| 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; |
| } |
| |
| if ( header->file_type & 1 ) |
| { |
| FT_TRACE2(( "[can't handle vector FNT fonts]\n" )); |
| error = FNT_Err_Unknown_File_Format; |
| goto Exit; |
| } |
| |
| /* small fixup -- some fonts have the `pixel_width' field set to 0 */ |
| if ( header->pixel_width == 0 ) |
| header->pixel_width = header->pixel_height; |
| |
| /* this is a FNT file/table, we now extract its frame */ |
| if ( FILE_Seek( font->offset ) || |
| EXTRACT_Frame( header->file_size, font->fnt_frame ) ) |
| goto Exit; |
| |
| Exit: |
| return error; |
| } |
| |
| |
| static void |
| fnt_face_done_fonts( FNT_Face face ) |
| { |
| FT_Memory memory = FT_FACE(face)->memory; |
| FT_Stream stream = FT_FACE(face)->stream; |
| FNT_Font* cur = face->fonts; |
| FNT_Font* limit = cur + face->num_fonts; |
| |
| |
| for ( ; cur < limit; cur++ ) |
| fnt_font_done( cur, stream ); |
| |
| FREE( face->fonts ); |
| face->num_fonts = 0; |
| } |
| |
| |
| static FT_Error |
| fnt_face_get_dll_fonts( FNT_Face face ) |
| { |
| FT_Error error; |
| FT_Stream stream = FT_FACE(face)->stream; |
| FT_Memory memory = FT_FACE(face)->memory; |
| WinMZ_Header mz_header; |
| |
| |
| face->fonts = 0; |
| face->num_fonts = 0; |
| |
| /* does it begin with a MZ header? */ |
| if ( FILE_Seek( 0 ) || |
| 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 a NE header in the file */ |
| WinNE_Header ne_header; |
| |
| |
| if ( FILE_Seek( mz_header.lfanew ) || |
| 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 in 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 ( FILE_Seek( res_offset ) || |
| ACCESS_Frame( ne_header.rname_tab_offset - |
| ne_header.resource_tab_offset ) ) |
| goto Exit; |
| |
| size_shift = GET_UShortLE(); |
| |
| for (;;) |
| { |
| FT_UShort type_id, count; |
| |
| |
| type_id = GET_UShortLE(); |
| if ( !type_id ) |
| break; |
| |
| count = GET_UShortLE(); |
| |
| if ( type_id == 0x8008 ) |
| { |
| font_count = count; |
| font_offset = (FT_ULong)( FILE_Pos() + 4 + |
| ( stream->cursor - stream->limit ) ); |
| break; |
| } |
| |
| stream->cursor += 4 + count * 12; |
| } |
| FORGET_Frame(); |
| |
| if ( !font_count || !font_offset ) |
| { |
| FT_TRACE2(( "this file doesn't contain any FNT resources!\n" )); |
| error = FNT_Err_Unknown_File_Format; |
| goto Exit; |
| } |
| |
| if ( FILE_Seek( font_offset ) || |
| ALLOC_ARRAY( face->fonts, font_count, FNT_Font ) ) |
| goto Exit; |
| |
| face->num_fonts = font_count; |
| |
| if ( ACCESS_Frame( (FT_Long)font_count * 12 ) ) |
| goto Exit; |
| |
| /* now read the offset and position of each FNT font */ |
| { |
| FNT_Font* cur = face->fonts; |
| FNT_Font* limit = cur + font_count; |
| |
| |
| for ( ; cur < limit; cur++ ) |
| { |
| cur->offset = (FT_ULong)GET_UShortLE() << size_shift; |
| cur->fnt_size = (FT_ULong)GET_UShortLE() << size_shift; |
| cur->size_shift = size_shift; |
| stream->cursor += 8; |
| } |
| } |
| FORGET_Frame(); |
| |
| /* finally, try to load each font there */ |
| { |
| FNT_Font* cur = face->fonts; |
| FNT_Font* limit = cur + font_count; |
| |
| |
| for ( ; cur < limit; cur++ ) |
| { |
| error = fnt_font_load( cur, stream ); |
| if ( error ) |
| goto Fail; |
| } |
| } |
| } |
| } |
| |
| Fail: |
| if ( error ) |
| fnt_face_done_fonts( face ); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| static void |
| FNT_Face_Done( FNT_Face face ) |
| { |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| |
| |
| fnt_face_done_fonts( face ); |
| |
| 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 ); |
| FT_UNUSED( face_index ); |
| |
| |
| /* try to load several fonts from a DLL */ |
| error = fnt_face_get_dll_fonts( face ); |
| if ( error ) |
| { |
| /* this didn't work, now try to load a single FNT font */ |
| FNT_Font* font; |
| |
| if ( ALLOC( face->fonts, sizeof ( *face->fonts ) ) ) |
| goto Exit; |
| |
| face->num_fonts = 1; |
| font = face->fonts; |
| |
| font->offset = 0; |
| font->fnt_size = stream->size; |
| |
| error = fnt_font_load( font, stream ); |
| if ( error ) |
| goto Fail; |
| } |
| |
| /* all right, one or more fonts were loaded; we now need to */ |
| /* fill the root FT_Face fields with relevant information */ |
| { |
| FT_Face root = FT_FACE( face ); |
| FNT_Font* fonts = face->fonts; |
| FNT_Font* limit = fonts + face->num_fonts; |
| FNT_Font* cur; |
| |
| |
| root->num_faces = 1; |
| root->face_flags = FT_FACE_FLAG_FIXED_SIZES | |
| FT_FACE_FLAG_HORIZONTAL; |
| |
| if ( fonts->header.avg_width == fonts->header.max_width ) |
| root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH; |
| |
| if ( fonts->header.italic ) |
| root->style_flags |= FT_STYLE_FLAG_ITALIC; |
| |
| if ( fonts->header.weight >= 800 ) |
| root->style_flags |= FT_STYLE_FLAG_BOLD; |
| |
| /* Setup the `fixed_sizes' array */ |
| if ( ALLOC_ARRAY( root->available_sizes, face->num_fonts, |
| FT_Bitmap_Size ) ) |
| goto Fail; |
| |
| root->num_fixed_sizes = face->num_fonts; |
| |
| { |
| FT_Bitmap_Size* size = root->available_sizes; |
| |
| |
| for ( cur = fonts; cur < limit; cur++, size++ ) |
| { |
| size->width = cur->header.pixel_width; |
| size->height = cur->header.pixel_height; |
| } |
| } |
| |
| /* Setup the `charmaps' array */ |
| root->charmaps = &face->charmap_handle; |
| root->num_charmaps = 1; |
| |
| face->charmap.encoding = ft_encoding_unicode; |
| face->charmap.platform_id = 3; |
| face->charmap.encoding_id = 1; |
| face->charmap.face = root; |
| |
| face->charmap_handle = &face->charmap; |
| |
| root->charmap = face->charmap_handle; |
| |
| /* setup remaining flags */ |
| root->num_glyphs = fonts->header.last_char - |
| fonts->header.first_char + 1; |
| |
| root->family_name = (FT_String*)fonts->fnt_frame + |
| fonts->header.face_name_offset; |
| 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"; |
| } |
| |
| Fail: |
| if ( error ) |
| FNT_Face_Done( face ); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| 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_UInt |
| FNT_Get_Char_Index( FT_CharMap charmap, |
| FT_Long char_code ) |
| { |
| FT_Long result = char_code; |
| |
| |
| if ( charmap ) |
| { |
| FNT_Font* font = ((FNT_Face)charmap->face)->fonts; |
| FT_Long first = font->header.first_char; |
| FT_Long count = font->header.last_char - first + 1; |
| |
| |
| char_code -= first; |
| if ( char_code < count ) |
| result = char_code + 1; |
| else |
| result = 0; |
| } |
| |
| return result; |
| } |
| |
| static FT_Long |
| FNT_Get_Next_Char( FT_CharMap charmap, |
| FT_Long char_code ) |
| { |
| char_code++; |
| if ( charmap ) |
| { |
| FNT_Font* font = ((FNT_Face)charmap->face)->fonts; |
| FT_Long first = font->header.first_char; |
| |
| |
| if ( char_code < first ) |
| char_code = first; |
| if ( char_code <= font->header.last_char ) |
| return char_code; |
| } |
| else |
| return char_code; |
| return 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 = NEXT_ShortLE(p); |
| |
| if ( new_format ) |
| offset = NEXT_ULongLE(p); |
| else |
| offset = NEXT_UShortLE(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 ( 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; |
| } |
| |
| |
| FT_CALLBACK_TABLE_DEF |
| const FT_Driver_Class winfnt_driver_class = |
| { |
| { |
| ft_module_font_driver, |
| sizeof ( FT_DriverRec ), |
| |
| "winfonts", |
| 0x10000L, |
| 0x20000L, |
| |
| 0, |
| |
| (FT_Module_Constructor)0, |
| (FT_Module_Destructor) 0, |
| (FT_Module_Requester) 0 |
| }, |
| |
| sizeof( FNT_FaceRec ), |
| sizeof( FNT_SizeRec ), |
| sizeof( FT_GlyphSlotRec ), |
| |
| (FTDriver_initFace) FNT_Face_Init, |
| (FTDriver_doneFace) FNT_Face_Done, |
| (FTDriver_initSize) 0, |
| (FTDriver_doneSize) 0, |
| (FTDriver_initGlyphSlot)0, |
| (FTDriver_doneGlyphSlot)0, |
| |
| (FTDriver_setCharSizes) FNT_Size_Set_Pixels, |
| (FTDriver_setPixelSizes)FNT_Size_Set_Pixels, |
| |
| (FTDriver_loadGlyph) FNT_Load_Glyph, |
| (FTDriver_getCharIndex) FNT_Get_Char_Index, |
| |
| (FTDriver_getKerning) 0, |
| (FTDriver_attachFile) 0, |
| (FTDriver_getAdvances) 0, |
| |
| (FTDriver_getNextChar) FNT_Get_Next_Char |
| }; |
| |
| |
| #ifdef FT_CONFIG_OPTION_DYNAMIC_DRIVERS |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* getDriverClass */ |
| /* */ |
| /* <Description> */ |
| /* This function is used when compiling the TrueType driver as a */ |
| /* shared library (`.DLL' or `.so'). It will be used by the */ |
| /* high-level library of FreeType to retrieve the address of the */ |
| /* driver's generic interface. */ |
| /* */ |
| /* It shouldn't be implemented in a static build, as each driver must */ |
| /* have the same function as an exported entry point. */ |
| /* */ |
| /* <Return> */ |
| /* The address of the TrueType's driver generic interface. The */ |
| /* format-specific interface can then be retrieved through the method */ |
| /* interface->get_format_interface. */ |
| /* */ |
| FT_EXPORT_DEF( const FT_Driver_Class* ) |
| getDriverClass( void ) |
| { |
| return &winfnt_driver_class; |
| } |
| |
| |
| #endif /* FT_CONFIG_OPTION_DYNAMIC_DRIVERS */ |
| |
| |
| /* END */ |