forked from minhngoc25a/freetype2
543 lines
20 KiB
C
543 lines
20 KiB
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 */
|