/******************************************************************* * * t1objs.c 1.0 * * Type1 Objects manager. * * Copyright 1996-1998 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 #include #include #include #include /* Required by tracing mode */ #undef FT_COMPONENT #define FT_COMPONENT trace_t1objs /******************************************************************* * * * SIZE FUNCTIONS * * * * * *******************************************************************/ /******************************************************************* * * T1_Done_Size * * * The TrueDoc instance object destructor. Used to discard * a given instance object.. * * * instance :: handle to the target instance object * * * TrueDoc error code. 0 means success * ******************************************************************/ LOCAL_FUNC void T1_Done_Size( T1_Size size ) { UNUSED(size); } /******************************************************************* * * T1_Init_Size * * * The instance object constructor * * * instance : handle to new instance object * face : pointer to parent face object * * * TrueDoc error code. 0 means success. * ******************************************************************/ LOCAL_DEF FT_Error T1_Init_Size( T1_Size size ) { size->valid = 0; return T1_Err_Ok; } /******************************************************************* * * T1_Reset_Size * * * Resets an instance to a new pointsize/transform. * This function is in charge of resetting the blue zones, * As well as the stem snap tables for a given size.. * * * instance the instance object to destroy * * * Error code. * ******************************************************************/ LOCAL_FUNC FT_Error T1_Reset_Size( T1_Size size ) { /* recompute ascender, descender, etc.. */ T1_Face face = (T1_Face)size->root.face; FT_Size_Metrics* metrics = &size->root.metrics; if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 ) return T1_Err_Invalid_Argument; /* Compute root ascender, descender, test height, and max_advance */ metrics->ascender = ( FT_MulFix( face->root.ascender, metrics->y_scale ) + 32 ) & -64; metrics->descender = ( FT_MulFix( face->root.descender, metrics->y_scale ) + 32 ) & -64; metrics->height = ( FT_MulFix( face->root.height, metrics->y_scale ) + 32 ) & -64; metrics->max_advance = ( FT_MulFix( face->root.max_advance_width, metrics->x_scale ) + 32 ) & -64; return 0; } /******************************************************************* * * * FACE FUNCTIONS * * * * * *******************************************************************/ /******************************************************************* * * T1_Done_Face * * * The face object destructor. * * * face :: typeless pointer to the face object to destroy * * * Error code. * ******************************************************************/ LOCAL_FUNC void T1_Done_Face( T1_Face face ) { FT_Memory memory; T1_Font* type1 = &face->type1; if (face) { memory = face->root.memory; #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT /* release multiple masters information */ T1_Done_Blend( face ); face->blend = 0; #endif /* release font info strings */ { T1_FontInfo* info = &type1->font_info; FREE( info->version ); FREE( info->notice ); FREE( info->full_name ); FREE( info->family_name ); FREE( info->weight ); } /* release top dictionary */ FREE( type1->charstrings_len ); FREE( type1->charstrings ); FREE( type1->glyph_names ); FREE( type1->subrs ); FREE( type1->subrs_len ); FREE( type1->subrs_block ); FREE( type1->charstrings_block ); FREE( type1->glyph_names_block ); FREE( type1->encoding.char_index ); FREE( type1->font_name ); #ifndef T1_CONFIG_OPTION_NO_AFM /* release afm data if present */ if ( face->afm_data) T1_Done_AFM( memory, (T1_AFM*)face->afm_data ); #endif /* release unicode map, if any */ FREE( face->unicode_map.maps ); face->unicode_map.num_maps = 0; face->root.family_name = 0; face->root.style_name = 0; } } /******************************************************************* * * T1_Init_Face * * * The face object constructor. * * * face :: face record to build * Input :: input stream where to load font data * * * Error code. * ******************************************************************/ LOCAL_FUNC FT_Error T1_Init_Face( FT_Stream stream, T1_Face face, FT_Int face_index, FT_Int num_params, FT_Parameter* params ) { FT_Error error; PSNames_Interface* psnames; UNUSED(num_params); UNUSED(params); UNUSED(face_index); UNUSED(stream); face->root.num_faces = 1; psnames = (PSNames_Interface*)face->psnames; if (!psnames) { /* look-up the PSNames driver */ FT_Driver psnames_driver; psnames_driver = FT_Get_Driver( face->root.driver->library, "psnames" ); if (psnames_driver) face->psnames = (PSNames_Interface*) (psnames_driver->interface.format_interface); } /* open the tokenizer, this will also check the font format */ error = T1_Open_Face( face ); if (error) goto Exit; /* if we just wanted to check the format, leave successfully now */ if (face_index < 0) goto Exit; /* check the face index */ if ( face_index != 0 ) { FT_ERROR(( "T1.Init_Face : invalid face index\n" )); error = T1_Err_Invalid_Argument; goto Exit; } /* Now, load the font program into the face object */ { /* Init the face object fields */ /* Now set up root face fields */ { FT_Face root = (FT_Face)&face->root; root->num_glyphs = face->type1.num_glyphs; root->num_charmaps = 1; root->face_index = face_index; root->face_flags = FT_FACE_FLAG_SCALABLE; root->face_flags |= FT_FACE_FLAG_HORIZONTAL; if ( face->type1.font_info.is_fixed_pitch ) root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH; if ( face->blend ) root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS; /* XXX : TO DO - add kerning with .afm support */ /* get style name - be careful, some broken fonts only */ /* have a /FontName dictionary entry .. !! */ root->family_name = face->type1.font_info.family_name; if (root->family_name) { char* full = face->type1.font_info.full_name; char* family = root->family_name; while ( *family && *full == *family ) { family++; full++; } root->style_name = ( *full == ' ' ? full+1 : "Regular" ); } else { /* do we have a /FontName ?? */ if (face->type1.font_name) { root->family_name = face->type1.font_name; root->style_name = "Regular"; } } /* no embedded bitmap support */ root->num_fixed_sizes = 0; root->available_sizes = 0; root->bbox = face->type1.font_bbox; root->units_per_EM = 1000; root->ascender = (FT_Short)face->type1.font_bbox.yMax; root->descender = -(FT_Short)face->type1.font_bbox.yMin; root->height = ((root->ascender + root->descender)*12)/10; /* now compute the maximum advance width */ root->max_advance_width = face->type1.private_dict.standard_width[0]; /* compute max advance width for proportional fonts */ if (!face->type1.font_info.is_fixed_pitch) { FT_Int max_advance; error = T1_Compute_Max_Advance( face, &max_advance ); /* in case of error, keep the standard width */ if (!error) root->max_advance_width = max_advance; else error = 0; /* clear error */ } root->max_advance_height = root->height; root->underline_position = face->type1.font_info.underline_position; root->underline_thickness = face->type1.font_info.underline_thickness; root->max_points = 0; root->max_contours = 0; } } /* charmap support - synthetize unicode charmap when possible */ { FT_Face root = &face->root; FT_CharMap charmap = face->charmaprecs; /* synthesize a Unicode charmap if there is support in the "psnames" */ /* module.. */ if (face->psnames) { PSNames_Interface* psnames = (PSNames_Interface*)face->psnames; if (psnames->unicode_value) { error = psnames->build_unicodes( root->memory, face->type1.num_glyphs, (const char**)face->type1.glyph_names, &face->unicode_map ); if (!error) { root->charmap = charmap; charmap->face = (FT_Face)face; charmap->encoding = ft_encoding_unicode; charmap->platform_id = 3; charmap->encoding_id = 1; charmap++; } /* simply clear the error in case of failure (which really) */ /* means that out of memory or no unicode glyph names */ error = 0; } } /* now, support either the standard, expert, or custom encodings */ charmap->face = (FT_Face)face; charmap->platform_id = 7; /* a new platform id for Adobe fonts ?? */ switch (face->type1.encoding_type) { case t1_encoding_standard: charmap->encoding = ft_encoding_adobe_standard; charmap->encoding_id = 0; break; case t1_encoding_expert: charmap->encoding = ft_encoding_adobe_expert; charmap->encoding_id = 1; break; default: charmap->encoding = ft_encoding_adobe_custom; charmap->encoding_id = 2; break; } root->charmaps = face->charmaps; root->num_charmaps = charmap - face->charmaprecs + 1; face->charmaps[0] = &face->charmaprecs[0]; face->charmaps[1] = &face->charmaprecs[1]; } Exit: return error; } /******************************************************************* * * Function : Glyph_Destroy * * Description : The glyph object destructor. * * Input : _glyph typeless pointer to the glyph record to destroy * * Output : Error code. * ******************************************************************/ LOCAL_FUNC void T1_Done_GlyphSlot( T1_GlyphSlot glyph ) { FT_Memory memory = glyph->root.face->memory; FT_Library library = glyph->root.face->driver->library; /* the bitmaps are created on demand */ FREE( glyph->root.bitmap.buffer ); FT_Outline_Done( library, &glyph->root.outline ); return; } /******************************************************************* * * Function : Glyph_Create * * Description : The glyph object constructor. * * Input : glyph glyph record to build. * face the glyph's parent face. * * Output : Error code. * ******************************************************************/ LOCAL_FUNC FT_Error T1_Init_GlyphSlot( T1_GlyphSlot glyph ) { FT_Library library = glyph->root.face->driver->library; glyph->max_points = 0; glyph->max_contours = 0; glyph->root.bitmap.buffer = 0; return FT_Outline_New( library, 0, 0, &glyph->root.outline ); } /******************************************************************* * * T1_Init_Driver * * * Initialise a given Type 1 driver object * * * driver :: handle to target driver object * * * Error code. * ******************************************************************/ LOCAL_FUNC FT_Error T1_Init_Driver( T1_Driver driver ) { UNUSED(driver); return T1_Err_Ok; } /******************************************************************* * * T1_Done_Driver * * * finalise a given Type 1 driver * * * driver :: handle to target Type 1 driver * ******************************************************************/ LOCAL_DEF void T1_Done_Driver( T1_Driver driver ) { UNUSED(driver); } /* END */