ref: a4367e0819da2b3e3b720c2b316f5b85ccfe4964
dir: /src/type1/t1objs.c/
/***************************************************************************/
/* */
/* 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 <freetype/internal/ftdebug.h>
#include <freetype/internal/ftstream.h>
#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 <type1/t1gload.h>
#include <type1/t1load.h>
#include <type1/t1afm.h>
#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
#include <type1/t1hinter.h>
#endif
#endif /* FT_FLAT_COMPILE */
#include <freetype/internal/psnames.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_t1objs
/*************************************************************************/
/* */
/* SIZE FUNCTIONS */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* T1_Done_Size */
/* */
/* <Description> */
/* The Type 1 size object destructor. Used to discard a given size */
/* object. */
/* */
/* <Input> */
/* 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;
}
}
/*************************************************************************/
/* */
/* <Function> */
/* T1_Init_Size */
/* */
/* <Description> */
/* The size object initializer. */
/* */
/* <Input> */
/* size :: A handle to the target size object. */
/* */
/* <Return> */
/* 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
}
/*************************************************************************/
/* */
/* <Function> */
/* T1_Reset_Size */
/* */
/* <Description> */
/* 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. */
/* */
/* <Input> */
/* size :: The target size object. */
/* */
/* <Output> */
/* 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 */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* T1_Done_Face */
/* */
/* <Description> */
/* The face object destructor. */
/* */
/* <Input> */
/* 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;
}
}
/*************************************************************************/
/* */
/* <Function> */
/* T1_Init_Face */
/* */
/* <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. */
/* */
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;
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;
}
/*************************************************************************/
/* */
/* <Function> */
/* T1_Done_GlyphSlot */
/* */
/* <Description> */
/* The glyph slot object destructor. */
/* */
/* <Input> */
/* 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
}
/*************************************************************************/
/* */
/* <Function> */
/* T1_Init_GlyphSlot */
/* */
/* <Description> */
/* The glyph slot object constructor. */
/* */
/* <Input> */
/* 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 */