542 lines
20 KiB
C
542 lines
20 KiB
C
/***************************************************************************/
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/* */
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/* t1objs.c */
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/* */
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/* Type 1 objects manager (body). */
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/* */
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/* Copyright 1996-2000 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#include <freetype/internal/ftdebug.h>
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#include <freetype/internal/ftstream.h>
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#ifdef FT_FLAT_COMPILE
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#include "t1gload.h"
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#include "t1load.h"
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#include "t1afm.h"
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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#include "t1hinter.h"
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#endif
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#else
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#include <type1/t1gload.h>
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#include <type1/t1load.h>
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#include <type1/t1afm.h>
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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#include <type1/t1hinter.h>
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#endif
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#endif
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#include <freetype/internal/psnames.h>
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_t1objs
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/*************************************************************************/
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/* */
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/* SIZE FUNCTIONS */
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/* */
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* <Function> */
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/* T1_Done_Size */
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/* */
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/* <Description> */
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/* The Type 1 size object destructor. Used to discard a given size */
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/* object. */
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/* */
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/* <Input> */
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/* size :: A handle to the target size object. */
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/* */
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LOCAL_FUNC
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void T1_Done_Size( T1_Size size )
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{
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if ( size )
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{
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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T1_Done_Size_Hinter( size );
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#endif
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size->valid = 0;
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}
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* T1_Init_Size */
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/* */
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/* <Description> */
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/* The size object initializer. */
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/* */
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/* <Input> */
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/* size :: A handle to the target size object. */
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/* */
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/* <Return> */
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/* FreeTrue error code. 0 means success. */
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/* */
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LOCAL_DEF
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FT_Error T1_Init_Size( T1_Size size )
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{
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FT_Error error;
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size->valid = 0;
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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error = T1_New_Size_Hinter( size );
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return error;
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#else
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FT_UNUSED( error );
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return T1_Err_Ok;
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#endif
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* T1_Reset_Size */
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/* */
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/* <Description> */
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/* Resets an instance to a new pointsize/transform. This function is */
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/* in charge of resetting the blue zones,a s well as the stem snap */
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/* tables for a given size. */
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/* */
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/* <Input> */
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/* size :: The target size object. */
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/* */
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/* <Output> */
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/* FreeType error code. 0 means success. */
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/* */
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LOCAL_FUNC
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FT_Error T1_Reset_Size( T1_Size size )
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{
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/* recompute ascender, descender, etc. */
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T1_Face face = (T1_Face)size->root.face;
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FT_Size_Metrics* metrics = &size->root.metrics;
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if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 )
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return FT_Err_Invalid_Argument;
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/* Compute root ascender, descender, test height, and max_advance */
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metrics->ascender = ( FT_MulFix( face->root.ascender,
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metrics->y_scale ) + 32 ) & -64;
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metrics->descender = ( FT_MulFix( face->root.descender,
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metrics->y_scale ) + 32 ) & -64;
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metrics->height = ( FT_MulFix( face->root.height,
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metrics->y_scale ) + 32 ) & -64;
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metrics->max_advance = ( FT_MulFix( face->root.max_advance_width,
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metrics->x_scale ) + 32 ) & -64;
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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return T1_Reset_Size_Hinter( size );
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#else
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return 0;
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#endif
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}
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/*************************************************************************/
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/* */
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/* FACE FUNCTIONS */
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/* */
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/* */
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* <Function> */
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/* T1_Done_Face */
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/* */
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/* <Description> */
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/* The face object destructor. */
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/* */
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/* <Input> */
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/* face :: A typeless pointer to the face object to destroy. */
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/* */
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LOCAL_FUNC
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void T1_Done_Face( T1_Face face )
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{
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FT_Memory memory;
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T1_Font* type1 = &face->type1;
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if ( face )
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{
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memory = face->root.memory;
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/* release font info strings */
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{
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T1_FontInfo* info = &type1->font_info;
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FREE( info->version );
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FREE( info->notice );
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FREE( info->full_name );
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FREE( info->family_name );
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FREE( info->weight );
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}
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/* release top dictionary */
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FREE( type1->charstrings_len );
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FREE( type1->charstrings );
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FREE( type1->glyph_names );
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FREE( type1->subrs );
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FREE( type1->subrs_len );
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FREE( type1->subrs_block );
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FREE( type1->charstrings_block );
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FREE( type1->glyph_names_block );
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FREE( type1->encoding.char_index );
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FREE( type1->font_name );
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#ifndef T1_CONFIG_OPTION_NO_AFM
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/* release afm data if present */
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if ( face->afm_data )
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T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
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#endif
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/* release unicode map, if any */
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FREE( face->unicode_map.maps );
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face->unicode_map.num_maps = 0;
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face->root.family_name = 0;
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face->root.style_name = 0;
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}
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}
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/*************************************************************************/
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/* */
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/* <Function> T1_Init_Face */
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/* */
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/* <Description> */
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/* The face object constructor. */
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/* */
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/* <Input> */
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/* stream :: input stream where to load font data. */
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/* */
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/* face_index :: The index of the font face in the resource. */
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/* */
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/* num_params :: Number of additional generic parameters. Ignored. */
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/* */
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/* params :: Additional generic parameters. Ignored. */
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/* */
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/* <InOut> */
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/* face :: The face record to build. */
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/* */
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/* <Return> */
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/* FreeType error code. 0 means success. */
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/* */
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LOCAL_FUNC
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FT_Error T1_Init_Face( FT_Stream stream,
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T1_Face face,
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FT_Int face_index,
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FT_Int num_params,
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FT_Parameter* params )
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{
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T1_Tokenizer tokenizer;
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FT_Error error;
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PSNames_Interface* psnames;
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FT_UNUSED( num_params );
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FT_UNUSED( params );
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FT_UNUSED( face_index );
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FT_UNUSED( face );
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face->root.num_faces = 1;
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psnames = (PSNames_Interface*)face->psnames;
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if ( !psnames )
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{
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psnames = (PSNames_Interface*)
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FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
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"psnames" );
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face->psnames = psnames;
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}
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/* open the tokenizer, this will also check the font format */
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error = New_Tokenizer( stream, &tokenizer );
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if ( error )
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goto Fail;
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/* if we just wanted to check the format, leave successfully now */
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if ( face_index < 0 )
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goto Leave;
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/* check the face index */
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if ( face_index != 0 )
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{
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FT_ERROR(( "T1_Init_Face: invalid face index\n" ));
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error = T1_Err_Invalid_Argument;
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goto Leave;
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}
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/* Now, load the font program into the face object */
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{
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T1_Parser parser;
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Init_T1_Parser( &parser, face, tokenizer );
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error = Parse_T1_FontProgram( &parser );
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if ( error )
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goto Leave;
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/* Init the face object fields */
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/* Now set up root face fields */
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{
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FT_Face root = (FT_Face)&face->root;
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T1_Font* type1 = &face->type1;
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root->num_glyphs = type1->num_glyphs;
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root->num_charmaps = 1;
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root->face_index = face_index;
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root->face_flags = FT_FACE_FLAG_SCALABLE;
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root->face_flags |= FT_FACE_FLAG_HORIZONTAL;
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if ( type1->font_info.is_fixed_pitch )
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root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
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/* XXX: TODO -- add kerning with .afm support */
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/* get style name - be careful, some broken fonts only */
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/* have a `/FontName' dictionary entry! */
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root->family_name = type1->font_info.family_name;
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if ( root->family_name )
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{
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char* full = type1->font_info.full_name;
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char* family = root->family_name;
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while ( *family && *full == *family )
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{
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family++;
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full++;
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}
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root->style_name = ( *full == ' ' ? full + 1
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: (char *)"Regular" );
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}
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else
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{
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/* do we have a `/FontName'? */
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if (type1->font_name)
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{
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root->family_name = type1->font_name;
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root->style_name = "Regular";
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}
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}
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/* no embedded bitmap support */
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root->num_fixed_sizes = 0;
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root->available_sizes = 0;
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root->bbox = type1->font_bbox;
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root->units_per_EM = 1000;
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root->ascender = (FT_Short)type1->font_bbox.yMax;
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root->descender = -(FT_Short)type1->font_bbox.yMin;
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root->height = ( ( root->ascender + root->descender) * 12 )
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/ 10;
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/* now compute the maximum advance width */
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root->max_advance_width = type1->private_dict.standard_width[0];
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/* compute max advance width for proportional fonts */
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if ( !type1->font_info.is_fixed_pitch )
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{
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FT_Int max_advance;
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error = T1_Compute_Max_Advance( face, &max_advance );
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/* in case of error, keep the standard width */
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if ( !error )
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root->max_advance_width = max_advance;
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else
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error = 0; /* clear error */
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}
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root->max_advance_height = root->height;
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root->underline_position = type1->font_info.underline_position;
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root->underline_thickness = type1->font_info.underline_thickness;
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root->max_points = 0;
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root->max_contours = 0;
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}
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}
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/* charmap support - synthetize unicode charmap when possible */
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{
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FT_Face root = &face->root;
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FT_CharMap charmap = face->charmaprecs;
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/* synthesize a Unicode charmap if there is support in the `PSNames' */
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/* module.. */
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if ( face->psnames )
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{
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PSNames_Interface* psnames = (PSNames_Interface*)face->psnames;
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if ( psnames->unicode_value )
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{
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error = psnames->build_unicodes(
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root->memory,
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face->type1.num_glyphs,
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(const char**)face->type1.glyph_names,
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&face->unicode_map );
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if ( !error )
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{
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root->charmap = charmap;
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charmap->face = (FT_Face)face;
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charmap->encoding = ft_encoding_unicode;
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charmap->platform_id = 3;
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charmap->encoding_id = 1;
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charmap++;
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}
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/* simply clear the error in case of failure (which really) */
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/* means that out of memory or no unicode glyph names */
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error = 0;
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}
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}
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/* now, support either the standard, expert, or custom encodings */
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charmap->face = (FT_Face)face;
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charmap->platform_id = 7; /* a new platform id for Adobe fonts ?? */
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switch ( face->type1.encoding_type )
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{
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case t1_encoding_standard:
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charmap->encoding = ft_encoding_adobe_standard;
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charmap->encoding_id = 0;
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break;
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case t1_encoding_expert:
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charmap->encoding = ft_encoding_adobe_expert;
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charmap->encoding_id = 1;
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break;
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default:
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charmap->encoding = ft_encoding_adobe_custom;
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charmap->encoding_id = 2;
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break;
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}
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root->charmaps = face->charmaps;
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root->num_charmaps = charmap - face->charmaprecs + 1;
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face->charmaps[0] = &face->charmaprecs[0];
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face->charmaps[1] = &face->charmaprecs[1];
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}
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Leave:
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Done_Tokenizer( tokenizer );
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Fail:
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return error;
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* T1_Done_GlyphSlot */
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/* */
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/* <Description> */
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/* The glyph slot object destructor. */
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/* */
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/* <Input> */
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/* glyph :: The glyph slot handle to destroy. */
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/* */
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LOCAL_FUNC
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void T1_Done_GlyphSlot( T1_GlyphSlot glyph )
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{
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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T1_Done_Glyph_Hinter( glyph );
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#else
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FT_UNUSED( glyph );
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#endif
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* T1_Init_GlyphSlot */
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/* */
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/* <Description> */
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/* The glyph slot object constructor. */
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/* */
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/* <Input> */
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/* glyph :: The glyph slot handle to initialize. */
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/* */
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LOCAL_FUNC
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FT_Error T1_Init_GlyphSlot( T1_GlyphSlot glyph )
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{
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FT_Error error = FT_Err_Ok;
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#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
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error = T1_New_Glyph_Hinter( glyph );
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#else
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FT_UNUSED( glyph );
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#endif
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return error;
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}
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/* END */
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