+++ /dev/null
-/***************************************************************************/
-/* */
-/* 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_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
- };
-
-
-#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 */
projects / rrdtool.git / blobdiff