/***************************************************************************/ /* */ /* t1objs.c */ /* */ /* Type 1 objects manager (body). */ /* */ /* Copyright 1996-2000 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 #ifdef FT_FLAT_COMPILE #include "t1gload.h" #include "t1load.h" #include "t1afm.h" #ifndef T1_CONFIG_OPTION_DISABLE_HINTER #include "t1hinter.h" #endif #else /* FT_FLAT_COMPILE */ #include #include #include #ifndef T1_CONFIG_OPTION_DISABLE_HINTER #include #endif #endif /* FT_FLAT_COMPILE */ #include /*************************************************************************/ /* */ /* 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_t1objs /*************************************************************************/ /* */ /* SIZE FUNCTIONS */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* */ /* T1_Done_Size */ /* */ /* */ /* The Type 1 size object destructor. Used to discard a given size */ /* object. */ /* */ /* */ /* size :: A handle to the target size object. */ /* */ LOCAL_FUNC void T1_Done_Size( T1_Size size ) { if ( size ) { #ifndef T1_CONFIG_OPTION_DISABLE_HINTER T1_Done_Size_Hinter( size ); #endif size->valid = 0; } } /*************************************************************************/ /* */ /* */ /* T1_Init_Size */ /* */ /* */ /* The size object initializer. */ /* */ /* */ /* size :: A handle to the target size object. */ /* */ /* */ /* FreeTrue error code. 0 means success. */ /* */ LOCAL_DEF FT_Error T1_Init_Size( T1_Size size ) { FT_Error error; size->valid = 0; #ifndef T1_CONFIG_OPTION_DISABLE_HINTER error = T1_New_Size_Hinter( size ); return error; #else FT_UNUSED( error ); return T1_Err_Ok; #endif } /*************************************************************************/ /* */ /* */ /* T1_Reset_Size */ /* */ /* */ /* Resets an instance to a new pointsize/transform. This function is */ /* in charge of resetting the blue zones,a s well as the stem snap */ /* tables for a given size. */ /* */ /* */ /* size :: The target size object. */ /* */ /* */ /* FreeType error code. 0 means success. */ /* */ 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 FT_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; #ifndef T1_CONFIG_OPTION_DISABLE_HINTER return T1_Reset_Size_Hinter( size ); #else return 0; #endif } /*************************************************************************/ /* */ /* FACE FUNCTIONS */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* */ /* T1_Done_Face */ /* */ /* */ /* The face object destructor. */ /* */ /* */ /* face :: A typeless pointer to the face object to destroy. */ /* */ LOCAL_FUNC void T1_Done_Face( T1_Face face ) { FT_Memory memory; T1_Font* type1 = &face->type1; if ( face ) { memory = face->root.memory; /* 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. */ /* */ /* */ /* stream :: input stream where to load font data. */ /* */ /* face_index :: The index of the font face in the resource. */ /* */ /* num_params :: Number of additional generic parameters. Ignored. */ /* */ /* params :: Additional generic parameters. Ignored. */ /* */ /* */ /* face :: The face record to build. */ /* */ /* */ /* FreeType error code. 0 means success. */ /* */ LOCAL_FUNC FT_Error T1_Init_Face( FT_Stream stream, T1_Face face, FT_Int face_index, FT_Int num_params, FT_Parameter* params ) { T1_Tokenizer tokenizer; FT_Error error; PSNames_Interface* psnames; FT_UNUSED( num_params ); FT_UNUSED( params ); FT_UNUSED( face_index ); FT_UNUSED( face ); face->root.num_faces = 1; psnames = (PSNames_Interface*)face->psnames; if ( !psnames ) { psnames = (PSNames_Interface*) FT_Get_Module_Interface( FT_FACE_LIBRARY( face ), "psnames" ); face->psnames = psnames; } /* open the tokenizer, this will also check the font format */ error = New_Tokenizer( stream, &tokenizer ); if ( error ) goto Fail; /* if we just wanted to check the format, leave successfully now */ if ( face_index < 0 ) goto Leave; /* check the face index */ if ( face_index != 0 ) { FT_ERROR(( "T1_Init_Face: invalid face index\n" )); error = T1_Err_Invalid_Argument; goto Leave; } /* Now, load the font program into the face object */ { T1_Parser parser; Init_T1_Parser( &parser, face, tokenizer ); error = Parse_T1_FontProgram( &parser ); if ( error ) goto Leave; /* Init the face object fields */ /* Now set up root face fields */ { FT_Face root = (FT_Face)&face->root; T1_Font* type1 = &face->type1; root->num_glyphs = 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; root->face_flags |= FT_FACE_FLAG_GLYPH_NAMES; if ( type1->font_info.is_fixed_pitch ) root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH; /* XXX: TODO -- add kerning with .afm support */ /* get style name - be careful, some broken fonts only */ /* have a `/FontName' dictionary entry! */ root->family_name = type1->font_info.family_name; if ( root->family_name ) { char* full = type1->font_info.full_name; char* family = root->family_name; while ( *family && *full == *family ) { family++; full++; } root->style_name = ( *full == ' ' ? full + 1 : (char *)"Regular" ); } else { /* do we have a `/FontName'? */ if (type1->font_name) { root->family_name = type1->font_name; root->style_name = "Regular"; } } /* no embedded bitmap support */ root->num_fixed_sizes = 0; root->available_sizes = 0; root->bbox = type1->font_bbox; root->units_per_EM = 1000; root->ascender = (FT_Short)type1->font_bbox.yMax; root->descender = -(FT_Short)type1->font_bbox.yMin; root->height = ( ( root->ascender + root->descender) * 12 ) / 10; /* now compute the maximum advance width */ root->max_advance_width = type1->private_dict.standard_width[0]; /* compute max advance width for proportional fonts */ if ( !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 = type1->font_info.underline_position; root->underline_thickness = 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]; } Leave: Done_Tokenizer( tokenizer ); Fail: return error; } /*************************************************************************/ /* */ /* */ /* T1_Done_GlyphSlot */ /* */ /* */ /* The glyph slot object destructor. */ /* */ /* */ /* glyph :: The glyph slot handle to destroy. */ /* */ LOCAL_FUNC void T1_Done_GlyphSlot( T1_GlyphSlot glyph ) { #ifndef T1_CONFIG_OPTION_DISABLE_HINTER T1_Done_Glyph_Hinter( glyph ); #else FT_UNUSED( glyph ); #endif } /*************************************************************************/ /* */ /* */ /* T1_Init_GlyphSlot */ /* */ /* */ /* The glyph slot object constructor. */ /* */ /* */ /* glyph :: The glyph slot handle to initialize. */ /* */ LOCAL_FUNC FT_Error T1_Init_GlyphSlot( T1_GlyphSlot glyph ) { FT_Error error = FT_Err_Ok; #ifndef T1_CONFIG_OPTION_DISABLE_HINTER error = T1_New_Glyph_Hinter( glyph ); #else FT_UNUSED( glyph ); #endif return error; } /* END */