ref: c949ab0757a2514cd3a37b3e1e8390fd662a025b
dir: /src/type1/t1objs.c/
/**************************************************************************** * * t1objs.c * * Type 1 objects manager (body). * * Copyright (C) 1996-2019 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_CALC_H #include FT_INTERNAL_DEBUG_H #include FT_INTERNAL_STREAM_H #include FT_TRUETYPE_IDS_H #include FT_DRIVER_H #include "t1gload.h" #include "t1load.h" #include "t1errors.h" #ifndef T1_CONFIG_OPTION_NO_AFM #include "t1afm.h" #endif #include FT_SERVICE_POSTSCRIPT_CMAPS_H #include FT_INTERNAL_POSTSCRIPT_AUX_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 t1objs /************************************************************************** * * SIZE FUNCTIONS * */ static PSH_Globals_Funcs T1_Size_Get_Globals_Funcs( T1_Size size ) { T1_Face face = (T1_Face)size->root.face; PSHinter_Service pshinter = (PSHinter_Service)face->pshinter; FT_Module module; module = FT_Get_Module( size->root.face->driver->root.library, "pshinter" ); return ( module && pshinter && pshinter->get_globals_funcs ) ? pshinter->get_globals_funcs( module ) : 0; } FT_LOCAL_DEF( void ) T1_Size_Done( FT_Size t1size ) /* T1_Size */ { T1_Size size = (T1_Size)t1size; if ( t1size->internal->module_data ) { PSH_Globals_Funcs funcs; funcs = T1_Size_Get_Globals_Funcs( size ); if ( funcs ) funcs->destroy( (PSH_Globals)t1size->internal->module_data ); t1size->internal->module_data = NULL; } } FT_LOCAL_DEF( FT_Error ) T1_Size_Init( FT_Size t1size ) /* T1_Size */ { T1_Size size = (T1_Size)t1size; FT_Error error = FT_Err_Ok; PSH_Globals_Funcs funcs = T1_Size_Get_Globals_Funcs( size ); if ( funcs ) { PSH_Globals globals; T1_Face face = (T1_Face)size->root.face; error = funcs->create( size->root.face->memory, &face->type1.private_dict, &globals ); if ( !error ) t1size->internal->module_data = globals; } return error; } FT_LOCAL_DEF( FT_Error ) T1_Size_Request( FT_Size t1size, /* T1_Size */ FT_Size_Request req ) { T1_Size size = (T1_Size)t1size; PSH_Globals_Funcs funcs = T1_Size_Get_Globals_Funcs( size ); FT_Request_Metrics( size->root.face, req ); if ( funcs ) funcs->set_scale( (PSH_Globals)t1size->internal->module_data, size->root.metrics.x_scale, size->root.metrics.y_scale, 0, 0 ); return FT_Err_Ok; } /************************************************************************** * * SLOT FUNCTIONS * */ FT_LOCAL_DEF( void ) T1_GlyphSlot_Done( FT_GlyphSlot slot ) { slot->internal->glyph_hints = NULL; } FT_LOCAL_DEF( FT_Error ) T1_GlyphSlot_Init( FT_GlyphSlot slot ) { T1_Face face; PSHinter_Service pshinter; face = (T1_Face)slot->face; pshinter = (PSHinter_Service)face->pshinter; if ( pshinter ) { FT_Module module; module = FT_Get_Module( slot->face->driver->root.library, "pshinter" ); if ( module ) { T1_Hints_Funcs funcs; funcs = pshinter->get_t1_funcs( module ); slot->internal->glyph_hints = (void*)funcs; } } return 0; } /************************************************************************** * * FACE FUNCTIONS * */ /************************************************************************** * * @Function: * T1_Face_Done * * @Description: * The face object destructor. * * @Input: * face :: * A typeless pointer to the face object to destroy. */ FT_LOCAL_DEF( void ) T1_Face_Done( FT_Face t1face ) /* T1_Face */ { T1_Face face = (T1_Face)t1face; FT_Memory memory; T1_Font type1; if ( !face ) return; memory = face->root.memory; type1 = &face->type1; #ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT /* release multiple masters information */ FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) ); if ( face->buildchar ) { FT_FREE( face->buildchar ); face->buildchar = NULL; face->len_buildchar = 0; } T1_Done_Blend( face ); face->blend = NULL; #endif /* release font info strings */ { PS_FontInfo info = &type1->font_info; FT_FREE( info->version ); FT_FREE( info->notice ); FT_FREE( info->full_name ); FT_FREE( info->family_name ); FT_FREE( info->weight ); } /* release top dictionary */ FT_FREE( type1->charstrings_len ); FT_FREE( type1->charstrings ); FT_FREE( type1->glyph_names ); FT_FREE( type1->subrs ); FT_FREE( type1->subrs_len ); ft_hash_num_free( type1->subrs_hash, memory ); FT_FREE( type1->subrs_hash ); FT_FREE( type1->subrs_block ); FT_FREE( type1->charstrings_block ); FT_FREE( type1->glyph_names_block ); FT_FREE( type1->encoding.char_index ); FT_FREE( type1->encoding.char_name ); FT_FREE( type1->font_name ); #ifndef T1_CONFIG_OPTION_NO_AFM /* release afm data if present */ if ( face->afm_data ) T1_Done_Metrics( memory, (AFM_FontInfo)face->afm_data ); #endif /* release unicode map, if any */ #if 0 FT_FREE( face->unicode_map_rec.maps ); face->unicode_map_rec.num_maps = 0; face->unicode_map = NULL; #endif face->root.family_name = NULL; face->root.style_name = NULL; } /************************************************************************** * * @Function: * T1_Face_Init * * @Description: * The face object constructor. * * @Input: * 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. * * @InOut: * face :: * The face record to build. * * @Return: * FreeType error code. 0 means success. */ FT_LOCAL_DEF( FT_Error ) T1_Face_Init( FT_Stream stream, FT_Face t1face, /* T1_Face */ FT_Int face_index, FT_Int num_params, FT_Parameter* params ) { T1_Face face = (T1_Face)t1face; FT_Error error; FT_Service_PsCMaps psnames; PSAux_Service psaux; T1_Font type1 = &face->type1; PS_FontInfo info = &type1->font_info; FT_UNUSED( num_params ); FT_UNUSED( params ); FT_UNUSED( stream ); face->root.num_faces = 1; FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); face->psnames = psnames; face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ), "psaux" ); psaux = (PSAux_Service)face->psaux; if ( !psaux ) { FT_ERROR(( "T1_Face_Init: cannot access `psaux' module\n" )); error = FT_THROW( Missing_Module ); goto Exit; } face->pshinter = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ), "pshinter" ); FT_TRACE2(( "Type 1 driver\n" )); /* open the tokenizer; this will also check the font format */ error = T1_Open_Face( face ); if ( error ) goto Exit; FT_TRACE2(( "T1_Face_Init: %08p (index %d)\n", face, face_index )); /* if we just wanted to check the format, leave successfully now */ if ( face_index < 0 ) goto Exit; /* check the face index */ if ( ( face_index & 0xFFFF ) > 0 ) { FT_ERROR(( "T1_Face_Init: invalid face index\n" )); error = FT_THROW( Invalid_Argument ); goto Exit; } /* now load the font program into the face object */ /* initialize the face object fields */ /* set up root face fields */ { FT_Face root = (FT_Face)&face->root; root->num_glyphs = type1->num_glyphs; root->face_index = 0; root->face_flags |= FT_FACE_FLAG_SCALABLE | FT_FACE_FLAG_HORIZONTAL | FT_FACE_FLAG_GLYPH_NAMES | FT_FACE_FLAG_HINTER; if ( info->is_fixed_pitch ) root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH; if ( face->blend ) root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS; /* The following code to extract the family and the style is very */ /* simplistic and might get some things wrong. For a full-featured */ /* algorithm you might have a look at the whitepaper given at */ /* */ /* https://blogs.msdn.com/text/archive/2007/04/23/wpf-font-selection-model.aspx */ /* get style name -- be careful, some broken fonts only */ /* have a `/FontName' dictionary entry! */ root->family_name = info->family_name; root->style_name = NULL; if ( root->family_name ) { char* full = info->full_name; char* family = root->family_name; if ( full ) { FT_Bool the_same = TRUE; while ( *full ) { if ( *full == *family ) { family++; full++; } else { if ( *full == ' ' || *full == '-' ) full++; else if ( *family == ' ' || *family == '-' ) family++; else { the_same = FALSE; if ( !*family ) root->style_name = full; break; } } } if ( the_same ) root->style_name = (char *)"Regular"; } } else { /* do we have a `/FontName'? */ if ( type1->font_name ) root->family_name = type1->font_name; } if ( !root->style_name ) { if ( info->weight ) root->style_name = info->weight; else /* assume `Regular' style because we don't know better */ root->style_name = (char *)"Regular"; } /* compute style flags */ root->style_flags = 0; if ( info->italic_angle ) root->style_flags |= FT_STYLE_FLAG_ITALIC; if ( info->weight ) { if ( !ft_strcmp( info->weight, "Bold" ) || !ft_strcmp( info->weight, "Black" ) ) root->style_flags |= FT_STYLE_FLAG_BOLD; } /* no embedded bitmap support */ root->num_fixed_sizes = 0; root->available_sizes = NULL; root->bbox.xMin = type1->font_bbox.xMin >> 16; root->bbox.yMin = type1->font_bbox.yMin >> 16; /* no `U' suffix here to 0xFFFF! */ root->bbox.xMax = ( type1->font_bbox.xMax + 0xFFFF ) >> 16; root->bbox.yMax = ( type1->font_bbox.yMax + 0xFFFF ) >> 16; /* Set units_per_EM if we didn't set it in t1_parse_font_matrix. */ if ( !root->units_per_EM ) root->units_per_EM = 1000; root->ascender = (FT_Short)( root->bbox.yMax ); root->descender = (FT_Short)( root->bbox.yMin ); root->height = (FT_Short)( ( root->units_per_EM * 12 ) / 10 ); if ( root->height < root->ascender - root->descender ) root->height = (FT_Short)( root->ascender - root->descender ); /* now compute the maximum advance width */ root->max_advance_width = (FT_Short)( root->bbox.xMax ); { FT_Pos max_advance; error = T1_Compute_Max_Advance( face, &max_advance ); /* in case of error, keep the standard width */ if ( !error ) root->max_advance_width = (FT_Short)FIXED_TO_INT( max_advance ); else error = FT_Err_Ok; /* clear error */ } root->max_advance_height = root->height; root->underline_position = (FT_Short)info->underline_position; root->underline_thickness = (FT_Short)info->underline_thickness; } { FT_Face root = &face->root; if ( psnames ) { FT_CharMapRec charmap; T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes; FT_CMap_Class clazz; charmap.face = root; /* first of all, try to synthesize a Unicode charmap */ charmap.platform_id = TT_PLATFORM_MICROSOFT; charmap.encoding_id = TT_MS_ID_UNICODE_CS; charmap.encoding = FT_ENCODING_UNICODE; error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL ); if ( error && FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) && FT_ERR_NEQ( error, Unimplemented_Feature ) ) goto Exit; error = FT_Err_Ok; /* now, generate an Adobe Standard encoding when appropriate */ charmap.platform_id = TT_PLATFORM_ADOBE; clazz = NULL; switch ( type1->encoding_type ) { case T1_ENCODING_TYPE_STANDARD: charmap.encoding = FT_ENCODING_ADOBE_STANDARD; charmap.encoding_id = TT_ADOBE_ID_STANDARD; clazz = cmap_classes->standard; break; case T1_ENCODING_TYPE_EXPERT: charmap.encoding = FT_ENCODING_ADOBE_EXPERT; charmap.encoding_id = TT_ADOBE_ID_EXPERT; clazz = cmap_classes->expert; break; case T1_ENCODING_TYPE_ARRAY: charmap.encoding = FT_ENCODING_ADOBE_CUSTOM; charmap.encoding_id = TT_ADOBE_ID_CUSTOM; clazz = cmap_classes->custom; break; case T1_ENCODING_TYPE_ISOLATIN1: charmap.encoding = FT_ENCODING_ADOBE_LATIN_1; charmap.encoding_id = TT_ADOBE_ID_LATIN_1; clazz = cmap_classes->unicode; break; default: ; } if ( clazz ) error = FT_CMap_New( clazz, NULL, &charmap, NULL ); } } Exit: return error; } /************************************************************************** * * @Function: * T1_Driver_Init * * @Description: * Initializes a given Type 1 driver object. * * @Input: * driver :: * A handle to the target driver object. * * @Return: * FreeType error code. 0 means success. */ FT_LOCAL_DEF( FT_Error ) T1_Driver_Init( FT_Module module ) { PS_Driver driver = (PS_Driver)module; FT_UInt32 seed; /* set default property values, cf. `ftt1drv.h' */ #ifdef T1_CONFIG_OPTION_OLD_ENGINE driver->hinting_engine = FT_HINTING_FREETYPE; #else driver->hinting_engine = FT_HINTING_ADOBE; #endif driver->no_stem_darkening = TRUE; driver->darken_params[0] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1; driver->darken_params[1] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y1; driver->darken_params[2] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X2; driver->darken_params[3] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y2; driver->darken_params[4] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X3; driver->darken_params[5] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y3; driver->darken_params[6] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X4; driver->darken_params[7] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_Y4; /* compute random seed from some memory addresses */ seed = (FT_UInt32)( (FT_Offset)(char*)&seed ^ (FT_Offset)(char*)&module ^ (FT_Offset)(char*)module->memory ); seed = seed ^ ( seed >> 10 ) ^ ( seed >> 20 ); driver->random_seed = (FT_Int32)seed; if ( driver->random_seed < 0 ) driver->random_seed = -driver->random_seed; else if ( driver->random_seed == 0 ) driver->random_seed = 123456789; return FT_Err_Ok; } /************************************************************************** * * @Function: * T1_Driver_Done * * @Description: * Finalizes a given Type 1 driver. * * @Input: * driver :: * A handle to the target Type 1 driver. */ FT_LOCAL_DEF( void ) T1_Driver_Done( FT_Module driver ) { FT_UNUSED( driver ); } /* END */