📄 bdf.c
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/* bdf.c
FreeType font driver for bdf files
Copyright (C) 2001, 2002 by
Francesco Zappa Nardelli
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#define FT_MAKE_OPTION_SINGLE_OBJECT
#include "ft2build.h"
/*
* Copyright 2000 Computing Research Labs, New Mexico State University
* Copyright 2001, 2002, 2003, 2004, 2005, 2006 Francesco Zappa Nardelli
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COMPUTING RESEARCH LAB OR NEW MEXICO STATE UNIVERSITY BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
* OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
* THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*************************************************************************/
/* */
/* This file is based on bdf.c,v 1.22 2000/03/16 20:08:50 */
/* */
/* taken from Mark Leisher's xmbdfed package */
/* */
/*************************************************************************/
#include "ft2build.h"
#include FT_FREETYPE_H
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H
#include FT_INTERNAL_OBJECTS_H
#include "bdf.h"
#include "bdferror.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_bdflib
/*************************************************************************/
/* */
/* Default BDF font options. */
/* */
/*************************************************************************/
static const bdf_options_t _bdf_opts =
{
1, /* Correct metrics. */
1, /* Preserve unencoded glyphs. */
0, /* Preserve comments. */
BDF_PROPORTIONAL /* Default spacing. */
};
/*************************************************************************/
/* */
/* Builtin BDF font properties. */
/* */
/*************************************************************************/
/* List of most properties that might appear in a font. Doesn't include */
/* the RAW_* and AXIS_* properties in X11R6 polymorphic fonts. */
static const bdf_property_t _bdf_properties[] =
{
{ (char *)"ADD_STYLE_NAME", BDF_ATOM, 1, { 0 } },
{ (char *)"AVERAGE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ (char *)"AVG_CAPITAL_WIDTH", BDF_INTEGER, 1, { 0 } },
{ (char *)"AVG_LOWERCASE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ (char *)"CAP_HEIGHT", BDF_INTEGER, 1, { 0 } },
{ (char *)"CHARSET_COLLECTIONS", BDF_ATOM, 1, { 0 } },
{ (char *)"CHARSET_ENCODING", BDF_ATOM, 1, { 0 } },
{ (char *)"CHARSET_REGISTRY", BDF_ATOM, 1, { 0 } },
{ (char *)"COMMENT", BDF_ATOM, 1, { 0 } },
{ (char *)"COPYRIGHT", BDF_ATOM, 1, { 0 } },
{ (char *)"DEFAULT_CHAR", BDF_CARDINAL, 1, { 0 } },
{ (char *)"DESTINATION", BDF_CARDINAL, 1, { 0 } },
{ (char *)"DEVICE_FONT_NAME", BDF_ATOM, 1, { 0 } },
{ (char *)"END_SPACE", BDF_INTEGER, 1, { 0 } },
{ (char *)"FACE_NAME", BDF_ATOM, 1, { 0 } },
{ (char *)"FAMILY_NAME", BDF_ATOM, 1, { 0 } },
{ (char *)"FIGURE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ (char *)"FONT", BDF_ATOM, 1, { 0 } },
{ (char *)"FONTNAME_REGISTRY", BDF_ATOM, 1, { 0 } },
{ (char *)"FONT_ASCENT", BDF_INTEGER, 1, { 0 } },
{ (char *)"FONT_DESCENT", BDF_INTEGER, 1, { 0 } },
{ (char *)"FOUNDRY", BDF_ATOM, 1, { 0 } },
{ (char *)"FULL_NAME", BDF_ATOM, 1, { 0 } },
{ (char *)"ITALIC_ANGLE", BDF_INTEGER, 1, { 0 } },
{ (char *)"MAX_SPACE", BDF_INTEGER, 1, { 0 } },
{ (char *)"MIN_SPACE", BDF_INTEGER, 1, { 0 } },
{ (char *)"NORM_SPACE", BDF_INTEGER, 1, { 0 } },
{ (char *)"NOTICE", BDF_ATOM, 1, { 0 } },
{ (char *)"PIXEL_SIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"POINT_SIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"QUAD_WIDTH", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_ASCENT", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_AVERAGE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_AVG_CAPITAL_WIDTH", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_AVG_LOWERCASE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_CAP_HEIGHT", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_DESCENT", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_END_SPACE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_FIGURE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_MAX_SPACE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_MIN_SPACE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_NORM_SPACE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_PIXEL_SIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_POINT_SIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_PIXELSIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_POINTSIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_QUAD_WIDTH", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_SMALL_CAP_SIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_STRIKEOUT_ASCENT", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_STRIKEOUT_DESCENT", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_SUBSCRIPT_SIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_SUBSCRIPT_X", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_SUBSCRIPT_Y", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_SUPERSCRIPT_SIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_SUPERSCRIPT_X", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_SUPERSCRIPT_Y", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_UNDERLINE_POSITION", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_UNDERLINE_THICKNESS", BDF_INTEGER, 1, { 0 } },
{ (char *)"RAW_X_HEIGHT", BDF_INTEGER, 1, { 0 } },
{ (char *)"RELATIVE_SETWIDTH", BDF_CARDINAL, 1, { 0 } },
{ (char *)"RELATIVE_WEIGHT", BDF_CARDINAL, 1, { 0 } },
{ (char *)"RESOLUTION", BDF_INTEGER, 1, { 0 } },
{ (char *)"RESOLUTION_X", BDF_CARDINAL, 1, { 0 } },
{ (char *)"RESOLUTION_Y", BDF_CARDINAL, 1, { 0 } },
{ (char *)"SETWIDTH_NAME", BDF_ATOM, 1, { 0 } },
{ (char *)"SLANT", BDF_ATOM, 1, { 0 } },
{ (char *)"SMALL_CAP_SIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"SPACING", BDF_ATOM, 1, { 0 } },
{ (char *)"STRIKEOUT_ASCENT", BDF_INTEGER, 1, { 0 } },
{ (char *)"STRIKEOUT_DESCENT", BDF_INTEGER, 1, { 0 } },
{ (char *)"SUBSCRIPT_SIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"SUBSCRIPT_X", BDF_INTEGER, 1, { 0 } },
{ (char *)"SUBSCRIPT_Y", BDF_INTEGER, 1, { 0 } },
{ (char *)"SUPERSCRIPT_SIZE", BDF_INTEGER, 1, { 0 } },
{ (char *)"SUPERSCRIPT_X", BDF_INTEGER, 1, { 0 } },
{ (char *)"SUPERSCRIPT_Y", BDF_INTEGER, 1, { 0 } },
{ (char *)"UNDERLINE_POSITION", BDF_INTEGER, 1, { 0 } },
{ (char *)"UNDERLINE_THICKNESS", BDF_INTEGER, 1, { 0 } },
{ (char *)"WEIGHT", BDF_CARDINAL, 1, { 0 } },
{ (char *)"WEIGHT_NAME", BDF_ATOM, 1, { 0 } },
{ (char *)"X_HEIGHT", BDF_INTEGER, 1, { 0 } },
{ (char *)"_MULE_BASELINE_OFFSET", BDF_INTEGER, 1, { 0 } },
{ (char *)"_MULE_RELATIVE_COMPOSE", BDF_INTEGER, 1, { 0 } },
};
static const unsigned long
_num_bdf_properties = sizeof ( _bdf_properties ) /
sizeof ( _bdf_properties[0] );
/*************************************************************************/
/* */
/* Hash table utilities for the properties. */
/* */
/*************************************************************************/
/* XXX: Replace this with FreeType's hash functions */
#define INITIAL_HT_SIZE 241
typedef void
(*hash_free_func)( hashnode node );
static hashnode*
hash_bucket( const char* key,
hashtable* ht )
{
const char* kp = key;
unsigned long res = 0;
hashnode* bp = ht->table, *ndp;
/* Mocklisp hash function. */
while ( *kp )
res = ( res << 5 ) - res + *kp++;
ndp = bp + ( res % ht->size );
while ( *ndp )
{
kp = (*ndp)->key;
if ( kp[0] == key[0] && ft_strcmp( kp, key ) == 0 )
break;
ndp--;
if ( ndp < bp )
ndp = bp + ( ht->size - 1 );
}
return ndp;
}
static FT_Error
hash_rehash( hashtable* ht,
FT_Memory memory )
{
hashnode* obp = ht->table, *bp, *nbp;
int i, sz = ht->size;
FT_Error error = BDF_Err_Ok;
ht->size <<= 1;
ht->limit = ht->size / 3;
if ( FT_NEW_ARRAY( ht->table, ht->size ) )
goto Exit;
for ( i = 0, bp = obp; i < sz; i++, bp++ )
{
if ( *bp )
{
nbp = hash_bucket( (*bp)->key, ht );
*nbp = *bp;
}
}
FT_FREE( obp );
Exit:
return error;
}
static FT_Error
hash_init( hashtable* ht,
FT_Memory memory )
{
int sz = INITIAL_HT_SIZE;
FT_Error error = BDF_Err_Ok;
ht->size = sz;
ht->limit = sz / 3;
ht->used = 0;
if ( FT_NEW_ARRAY( ht->table, sz ) )
goto Exit;
Exit:
return error;
}
static void
hash_free( hashtable* ht,
FT_Memory memory )
{
if ( ht != 0 )
{
int i, sz = ht->size;
hashnode* bp = ht->table;
for ( i = 0; i < sz; i++, bp++ )
FT_FREE( *bp );
FT_FREE( ht->table );
}
}
static FT_Error
hash_insert( char* key,
void* data,
hashtable* ht,
FT_Memory memory )
{
hashnode nn, *bp = hash_bucket( key, ht );
FT_Error error = BDF_Err_Ok;
nn = *bp;
if ( !nn )
{
if ( FT_NEW( nn ) )
goto Exit;
*bp = nn;
nn->key = key;
nn->data = data;
if ( ht->used >= ht->limit )
{
error = hash_rehash( ht, memory );
if ( error )
goto Exit;
}
ht->used++;
}
else
nn->data = data;
Exit:
return error;
}
static hashnode
hash_lookup( const char* key,
hashtable* ht )
{
hashnode *np = hash_bucket( key, ht );
return *np;
}
/*************************************************************************/
/* */
/* Utility types and functions. */
/* */
/*************************************************************************/
/* Function type for parsing lines of a BDF font. */
typedef FT_Error
(*_bdf_line_func_t)( char* line,
unsigned long linelen,
unsigned long lineno,
void* call_data,
void* client_data );
/* List structure for splitting lines into fields. */
typedef struct _bdf_list_t_
{
char** field;
unsigned long size;
unsigned long used;
FT_Memory memory;
} _bdf_list_t;
/* Structure used while loading BDF fonts. */
typedef struct _bdf_parse_t_
{
unsigned long flags;
unsigned long cnt;
unsigned long row;
short minlb;
short maxlb;
short maxrb;
short maxas;
short maxds;
short rbearing;
char* glyph_name;
long glyph_enc;
bdf_font_t* font;
bdf_options_t* opts;
unsigned long have[2048];
_bdf_list_t list;
FT_Memory memory;
} _bdf_parse_t;
#define setsbit( m, cc ) ( m[(cc) >> 3] |= (FT_Byte)( 1 << ( (cc) & 7 ) ) )
#define sbitset( m, cc ) ( m[(cc) >> 3] & ( 1 << ( (cc) & 7 ) ) )
static void
_bdf_list_init( _bdf_list_t* list,
FT_Memory memory )
{
FT_ZERO( list );
list->memory = memory;
}
static void
_bdf_list_done( _bdf_list_t* list )
{
FT_Memory memory = list->memory;
if ( memory )
{
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