ref: e12a471f6af23257f4c406feb8745eb12915fa7d
dir: /src/bdf/bdflib.c/
/*
* 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 )
{
FT_FREE( list->field );
FT_ZERO( list );
}
}
static FT_Error
_bdf_list_ensure( _bdf_list_t* list,
int num_items )
{
FT_Error error = BDF_Err_Ok;
if ( num_items > (int)list->size )
{
int oldsize = list->size;
int newsize = oldsize + ( oldsize >> 1 ) + 4;
int bigsize = FT_INT_MAX / sizeof ( char* );
FT_Memory memory = list->memory;
if ( oldsize == bigsize )
{
error = BDF_Err_Out_Of_Memory;
goto Exit;
}
else if ( newsize < oldsize || newsize > bigsize )
newsize = bigsize;
if ( FT_RENEW_ARRAY( list->field, oldsize, newsize ) )
goto Exit;
list->size = newsize;
}
Exit:
return error;
}
static void
_bdf_list_shift( _bdf_list_t* list,
unsigned long n )
{
unsigned long i, u;
if ( list == 0 || list->used == 0 || n == 0 )
return;
if ( n >= list->used )
{
list->used = 0;
return;
}
for ( u = n, i = 0; u < list->used; i++, u++ )
list->field[i] = list->field[u];
list->used -= n;
}
static char *
_bdf_list_join( _bdf_list_t* list,
int c,
unsigned long *alen )
{
unsigned long i, j;
char *fp, *dp;
*alen = 0;
if ( list == 0 || list->used == 0 )
return 0;
dp = list->field[0];
for ( i = j = 0; i < list->used; i++ )
{
fp = list->field[i];
while ( *fp )
dp[j++] = *fp++;
if ( i + 1 < list->used )
dp[j++] = (char)c;
}
dp[j] = 0;
*alen = j;
return dp;
}
/* An empty string for empty fields. */
static const char empty[1] = { 0 }; /* XXX eliminate this */
static FT_Error
_bdf_list_split( _bdf_list_t* list,
char* separators,
char* line,
unsigned long linelen )
{
int mult, final_empty;
char *sp, *ep, *end;
char seps[32];
FT_Error error = BDF_Err_Ok;
/* Initialize the list. */
list->used = 0;
/* If the line is empty, then simply return. */
if ( linelen == 0 || line[0] == 0 )
goto Exit;
/* In the original code, if the `separators' parameter is NULL or */
/* empty, the list is split into individual bytes. We don't need */
/* this, so an error is signaled. */
if ( separators == 0 || *separators == 0 )
{
error = BDF_Err_Invalid_Argument;
goto Exit;
}
/* Prepare the separator bitmap. */
FT_MEM_ZERO( seps, 32 );
/* If the very last character of the separator string is a plus, then */
/* set the `mult' flag to indicate that multiple separators should be */
/* collapsed into one. */
for ( mult = 0, sp = separators; sp && *sp; sp++ )
{
if ( *sp == '+' && *( sp + 1 ) == 0 )
mult = 1;
else
setsbit( seps, *sp );
}
/* Break the line up into fields. */
for ( final_empty = 0, sp = ep = line, end = sp + linelen;
sp < end && *sp; )
{
/* Collect everything that is not a separator. */
for ( ; *ep && !sbitset( seps, *ep ); ep++ )
;
/* Resize the list if necessary. */
if ( list->used == list->size )
{
error = _bdf_list_ensure( list, list->used + 1 );
if ( error )
goto Exit;
}
/* Assign the field appropriately. */
list->field[list->used++] = ( ep > sp ) ? sp : (char*)empty;
sp = ep;
if ( mult )
{
/* If multiple separators should be collapsed, do it now by */
/* setting all the separator characters to 0. */
for ( ; *ep && sbitset( seps, *ep ); ep++ )
*ep = 0;
}
else if ( *ep != 0 )
/* Don't collapse multiple separators by making them 0, so just */
/* make the one encountered 0. */
*ep++ = 0;
final_empty = ( ep > sp && *ep == 0 );
sp = ep;
}
/* Finally, NULL-terminate the list. */
if ( list->used + final_empty >= list->size )
{
error = _bdf_list_ensure( list, list->used + final_empty + 1 );
if ( error )
goto Exit;
}
if ( final_empty )
list->field[list->used++] = (char*)empty;
list->field[list->used] = 0;
Exit:
return error;
}
#define NO_SKIP 256 /* this value cannot be stored in a 'char' */
static FT_Error
_bdf_readstream( FT_Stream stream,
_bdf_line_func_t callback,
void* client_data,
unsigned long *lno )
{
_bdf_line_func_t cb;
unsigned long lineno, buf_size;
int refill, bytes, hold, to_skip;
int start, end, cursor, avail;
char* buf = 0;
FT_Memory memory = stream->memory;
FT_Error error = BDF_Err_Ok;
if ( callback == 0 )
{
error = BDF_Err_Invalid_Argument;
goto Exit;
}
/* initial size and allocation of the input buffer */
buf_size = 1024;
if ( FT_NEW_ARRAY( buf, buf_size ) )
goto Exit;
cb = callback;
lineno = 1;
buf[0] = 0;
start = 0;
end = 0;
avail = 0;
cursor = 0;
refill = 1;
to_skip = NO_SKIP;
bytes = 0; /* make compiler happy */
for (;;)
{
if ( refill )
{
bytes = (int)FT_Stream_TryRead( stream, (FT_Byte*)buf + cursor,
(FT_ULong)(buf_size - cursor) );
avail = cursor + bytes;
cursor = 0;
refill = 0;
}
end = start;
/* should we skip an optional character like \n or \r? */
if ( start < avail && buf[start] == to_skip )
{
start += 1;
to_skip = NO_SKIP;
continue;
}
/* try to find the end of the line */
while ( end < avail && buf[end] != '\n' && buf[end] != '\r' )
end++;
/* if we hit the end of the buffer, try shifting its content */
/* or even resizing it */
if ( end >= avail )
{
if ( bytes == 0 ) /* last line in file doesn't end in \r or \n */
break; /* ignore it then exit */
if ( start == 0 )
{
/* this line is definitely too long; try resizing the input */
/* buffer a bit to handle it. */
FT_ULong new_size;
if ( buf_size >= 65536UL ) /* limit ourselves to 64KByte */
{
error = BDF_Err_Invalid_Argument;
goto Exit;
}
new_size = buf_size * 2;
if ( FT_RENEW_ARRAY( buf, buf_size, new_size ) )
goto Exit;
cursor = buf_size;
buf_size = new_size;
}
else
{
bytes = avail - start;
FT_MEM_COPY( buf, buf + start, bytes );
cursor = bytes;
avail -= bytes;
start = 0;
}
refill = 1;
continue;
}
/* Temporarily NUL-terminate the line. */
hold = buf[end];
buf[end] = 0;
/* XXX: Use encoding independent value for 0x1a */
if ( buf[start] != '#' && buf[start] != 0x1a && end > start )
{
error = (*cb)( buf + start, end - start, lineno,
(void*)&cb, client_data );
if ( error )
break;
}
lineno += 1;
buf[end] = (char)hold;
start = end + 1;
if ( hold == '\n' )
to_skip = '\r';
else if ( hold == '\r' )
to_skip = '\n';
else
to_skip = NO_SKIP;
}
*lno = lineno;
Exit:
FT_FREE( buf );
return error;
}
/* XXX: make this work with EBCDIC also */
static const unsigned char a2i[128] =
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static const unsigned char odigits[32] =
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static const unsigned char ddigits[32] =
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x03,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static const unsigned char hdigits[32] =
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x03,
0x7e, 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
#define isdigok( m, d ) (m[(d) >> 3] & ( 1 << ( (d) & 7 ) ) )
/* Routine to convert an ASCII string into an unsigned long integer. */
static unsigned long
_bdf_atoul( char* s,
char** end,
int base )
{
unsigned long v;
const unsigned char* dmap;
if ( s == 0 || *s == 0 )
return 0;
/* Make sure the radix is something recognizable. Default to 10. */
switch ( base )
{
case 8:
dmap = odigits;
break;
case 16:
dmap = hdigits;
break;
default:
base = 10;
dmap = ddigits;
break;
}
/* Check for the special hex prefix. */
if ( *s == '0' &&
( *( s + 1 ) == 'x' || *( s + 1 ) == 'X' ) )
{
base = 16;
dmap = hdigits;
s += 2;
}
for ( v = 0; isdigok( dmap, *s ); s++ )
v = v * base + a2i[(int)*s];
if ( end != 0 )
*end = s;
return v;
}
/* Routine to convert an ASCII string into an signed long integer. */
static long
_bdf_atol( char* s,
char** end,
int base )
{
long v, neg;
const unsigned char* dmap;
if ( s == 0 || *s == 0 )
return 0;
/* Make sure the radix is something recognizable. Default to 10. */
switch ( base )
{
case 8:
dmap = odigits;
break;
case 16:
dmap = hdigits;
break;
default:
base = 10;
dmap = ddigits;
break;
}
/* Check for a minus sign. */
neg = 0;
if ( *s == '-' )
{
s++;
neg = 1;
}
/* Check for the special hex prefix. */
if ( *s == '0' &&
( *( s + 1 ) == 'x' || *( s + 1 ) == 'X' ) )
{
base = 16;
dmap = hdigits;
s += 2;
}
for ( v = 0; isdigok( dmap, *s ); s++ )
v = v * base + a2i[(int)*s];
if ( end != 0 )
*end = s;
return ( !neg ) ? v : -v;
}
/* Routine to convert an ASCII string into an signed short integer. */
static short
_bdf_atos( char* s,
char** end,
int base )
{
short v, neg;
const unsigned char* dmap;
if ( s == 0 || *s == 0 )
return 0;
/* Make sure the radix is something recognizable. Default to 10. */
switch ( base )
{
case 8:
dmap = odigits;
break;
case 16:
dmap = hdigits;
break;
default:
base = 10;
dmap = ddigits;
break;
}
/* Check for a minus. */
neg = 0;
if ( *s == '-' )
{
s++;
neg = 1;
}
/* Check for the special hex prefix. */
if ( *s == '0' &&
( *( s + 1 ) == 'x' || *( s + 1 ) == 'X' ) )
{
base = 16;
dmap = hdigits;
s += 2;
}
for ( v = 0; isdigok( dmap, *s ); s++ )
v = (short)( v * base + a2i[(int)*s] );
if ( end != 0 )
*end = s;
return (short)( ( !neg ) ? v : -v );
}
/* Routine to compare two glyphs by encoding so they can be sorted. */
static int
by_encoding( const void* a,
const void* b )
{
bdf_glyph_t *c1, *c2;
c1 = (bdf_glyph_t *)a;
c2 = (bdf_glyph_t *)b;
if ( c1->encoding < c2->encoding )
return -1;
if ( c1->encoding > c2->encoding )
return 1;
return 0;
}
static FT_Error
bdf_create_property( char* name,
int format,
bdf_font_t* font )
{
unsigned long n;
bdf_property_t* p;
FT_Memory memory = font->memory;
FT_Error error = BDF_Err_Ok;
/* First check to see if the property has */
/* already been added or not. If it has, then */
/* simply ignore it. */
if ( hash_lookup( name, &(font->proptbl) ) )
goto Exit;
if ( FT_RENEW_ARRAY( font->user_props,
font->nuser_props,
font->nuser_props + 1 ) )
goto Exit;
p = font->user_props + font->nuser_props;
FT_ZERO( p );
n = (unsigned long)( ft_strlen( name ) + 1 );
if ( FT_NEW_ARRAY( p->name, n ) )
goto Exit;
FT_MEM_COPY( (char *)p->name, name, n );
p->format = format;
p->builtin = 0;
n = _num_bdf_properties + font->nuser_props;
error = hash_insert( p->name, (void *)n, &(font->proptbl), memory );
if ( error )
goto Exit;
font->nuser_props++;
Exit:
return error;
}
FT_LOCAL_DEF( bdf_property_t * )
bdf_get_property( char* name,
bdf_font_t* font )
{
hashnode hn;
unsigned long propid;
if ( name == 0 || *name == 0 )
return 0;
if ( ( hn = hash_lookup( name, &(font->proptbl) ) ) == 0 )
return 0;
propid = (unsigned long)hn->data;
if ( propid >= _num_bdf_properties )
return font->user_props + ( propid - _num_bdf_properties );
return (bdf_property_t*)_bdf_properties + propid;
}
/*************************************************************************/
/* */
/* BDF font file parsing flags and functions. */
/* */
/*************************************************************************/
/* Parse flags. */
#define _BDF_START 0x0001
#define _BDF_FONT_NAME 0x0002
#define _BDF_SIZE 0x0004
#define _BDF_FONT_BBX 0x0008
#define _BDF_PROPS 0x0010
#define _BDF_GLYPHS 0x0020
#define _BDF_GLYPH 0x0040
#define _BDF_ENCODING 0x0080
#define _BDF_SWIDTH 0x0100
#define _BDF_DWIDTH 0x0200
#define _BDF_BBX 0x0400
#define _BDF_BITMAP 0x0800
#define _BDF_SWIDTH_ADJ 0x1000
#define _BDF_GLYPH_BITS ( _BDF_GLYPH | \
_BDF_ENCODING | \
_BDF_SWIDTH | \
_BDF_DWIDTH | \
_BDF_BBX | \
_BDF_BITMAP )
#define _BDF_GLYPH_WIDTH_CHECK 0x40000000UL
#define _BDF_GLYPH_HEIGHT_CHECK 0x80000000UL
/* Auto correction messages. */
#define ACMSG1 "FONT_ASCENT property missing. " \
"Added \"FONT_ASCENT %hd\".\n"
#define ACMSG2 "FONT_DESCENT property missing. " \
"Added \"FONT_DESCENT %hd\".\n"
#define ACMSG3 "Font width != actual width. Old: %hd New: %hd.\n"
#define ACMSG4 "Font left bearing != actual left bearing. " \
"Old: %hd New: %hd.\n"
#define ACMSG5 "Font ascent != actual ascent. Old: %hd New: %hd.\n"
#define ACMSG6 "Font descent != actual descent. Old: %hd New: %hd.\n"
#define ACMSG7 "Font height != actual height. Old: %hd New: %hd.\n"
#define ACMSG8 "Glyph scalable width (SWIDTH) adjustments made.\n"
#define ACMSG9 "SWIDTH field missing at line %ld. Set automatically.\n"
#define ACMSG10 "DWIDTH field missing at line %ld. Set to glyph width.\n"
#define ACMSG11 "SIZE bits per pixel field adjusted to %hd.\n"
#define ACMSG12 "Duplicate encoding %ld (%s) changed to unencoded.\n"
#define ACMSG13 "Glyph %ld extra rows removed.\n"
#define ACMSG14 "Glyph %ld extra columns removed.\n"
#define ACMSG15 "Incorrect glyph count: %ld indicated but %ld found.\n"
/* Error messages. */
#define ERRMSG1 "[line %ld] Missing \"%s\" line.\n"
#define ERRMSG2 "[line %ld] Font header corrupted or missing fields.\n"
#define ERRMSG3 "[line %ld] Font glyphs corrupted or missing fields.\n"
#define ERRMSG4 "[line %ld] BBX too big.\n"
static FT_Error
_bdf_add_comment( bdf_font_t* font,
char* comment,
unsigned long len )
{
char* cp;
FT_Memory memory = font->memory;
FT_Error error = BDF_Err_Ok;
if ( FT_RENEW_ARRAY( font->comments,
font->comments_len,
font->comments_len + len + 1 ) )
goto Exit;
cp = font->comments + font->comments_len;
FT_MEM_COPY( cp, comment, len );
cp[len] = '\n';
font->comments_len += len + 1;
Exit:
return error;
}
/* Set the spacing from the font name if it exists, or set it to the */
/* default specified in the options. */
static FT_Error
_bdf_set_default_spacing( bdf_font_t* font,
bdf_options_t* opts )
{
unsigned long len;
char name[128];
_bdf_list_t list;
FT_Memory memory;
FT_Error error = BDF_Err_Ok;
if ( font == 0 || font->name == 0 || font->name[0] == 0 )
{
error = BDF_Err_Invalid_Argument;
goto Exit;
}
memory = font->memory;
_bdf_list_init( &list, memory );
font->spacing = opts->font_spacing;
len = (unsigned long)( ft_strlen( font->name ) + 1 );
FT_MEM_COPY( name, font->name, len );
error = _bdf_list_split( &list, (char *)"-", name, len );
if ( error )
goto Fail;
if ( list.used == 15 )
{
switch ( list.field[11][0] )
{
case 'C':
case 'c':
font->spacing = BDF_CHARCELL;
break;
case 'M':
case 'm':
font->spacing = BDF_MONOWIDTH;
break;
case 'P':
case 'p':
font->spacing = BDF_PROPORTIONAL;
break;
}
}
Fail:
_bdf_list_done( &list );
Exit:
return error;
}
/* Determine whether the property is an atom or not. If it is, then */
/* clean it up so the double quotes are removed if they exist. */
static int
_bdf_is_atom( char* line,
unsigned long linelen,
char** name,
char** value,
bdf_font_t* font )
{
int hold;
char *sp, *ep;
bdf_property_t* p;
*name = sp = ep = line;
while ( *ep && *ep != ' ' && *ep != '\t' )
ep++;
hold = -1;
if ( *ep )
{
hold = *ep;
*ep = 0;
}
p = bdf_get_property( sp, font );
/* Restore the character that was saved before any return can happen. */
if ( hold != -1 )
*ep = (char)hold;
/* If the property exists and is not an atom, just return here. */
if ( p && p->format != BDF_ATOM )
return 0;
/* The property is an atom. Trim all leading and trailing whitespace */
/* and double quotes for the atom value. */
sp = ep;
ep = line + linelen;
/* Trim the leading whitespace if it exists. */
*sp++ = 0;
while ( *sp &&
( *sp == ' ' || *sp == '\t' ) )
sp++;
/* Trim the leading double quote if it exists. */
if ( *sp == '"' )
sp++;
*value = sp;
/* Trim the trailing whitespace if it exists. */
while ( ep > sp &&
( *( ep - 1 ) == ' ' || *( ep - 1 ) == '\t' ) )
*--ep = 0;
/* Trim the trailing double quote if it exists. */
if ( ep > sp && *( ep - 1 ) == '"' )
*--ep = 0;
return 1;
}
static FT_Error
_bdf_add_property( bdf_font_t* font,
char* name,
char* value )
{
unsigned long propid;
hashnode hn;
int len;
bdf_property_t *prop, *fp;
FT_Memory memory = font->memory;
FT_Error error = BDF_Err_Ok;
/* First, check to see if the property already exists in the font. */
if ( ( hn = hash_lookup( name, (hashtable *)font->internal ) ) != 0 )
{
/* The property already exists in the font, so simply replace */
/* the value of the property with the current value. */
fp = font->props + (unsigned long)hn->data;
switch ( fp->format )
{
case BDF_ATOM:
/* Delete the current atom if it exists. */
FT_FREE( fp->value.atom );
if ( value == 0 )
len = 1;
else
len = ft_strlen( value ) + 1;
if ( len > 1 )
{
if ( FT_NEW_ARRAY( fp->value.atom, len ) )
goto Exit;
FT_MEM_COPY( fp->value.atom, value, len );
}
else
fp->value.atom = 0;
break;
case BDF_INTEGER:
fp->value.int32 = _bdf_atol( value, 0, 10 );
break;
case BDF_CARDINAL:
fp->value.card32 = _bdf_atoul( value, 0, 10 );
break;
default:
;
}
goto Exit;
}
/* See whether this property type exists yet or not. */
/* If not, create it. */
hn = hash_lookup( name, &(font->proptbl) );
if ( hn == 0 )
{
error = bdf_create_property( name, BDF_ATOM, font );
if ( error )
goto Exit;
hn = hash_lookup( name, &(font->proptbl) );
}
/* Allocate another property if this is overflow. */
if ( font->props_used == font->props_size )
{
if ( font->props_size == 0 )
{
if ( FT_NEW_ARRAY( font->props, 1 ) )
goto Exit;
}
else
{
if ( FT_RENEW_ARRAY( font->props,
font->props_size,
font->props_size + 1 ) )
goto Exit;
}
fp = font->props + font->props_size;
FT_MEM_ZERO( fp, sizeof ( bdf_property_t ) );
font->props_size++;
}
propid = (unsigned long)hn->data;
if ( propid >= _num_bdf_properties )
prop = font->user_props + ( propid - _num_bdf_properties );
else
prop = (bdf_property_t*)_bdf_properties + propid;
fp = font->props + font->props_used;
fp->name = prop->name;
fp->format = prop->format;
fp->builtin = prop->builtin;
switch ( prop->format )
{
case BDF_ATOM:
if ( value == 0 )
len = 1;
else
len = ft_strlen( value ) + 1;
if ( len > 1 )
{
if ( FT_NEW_ARRAY( fp->value.atom, len ) )
goto Exit;
FT_MEM_COPY( fp->value.atom, value, len );
}
else
fp->value.atom = 0;
break;
case BDF_INTEGER:
fp->value.int32 = _bdf_atol( value, 0, 10 );
break;
case BDF_CARDINAL:
fp->value.card32 = _bdf_atoul( value, 0, 10 );
break;
}
/* If the property happens to be a comment, then it doesn't need */
/* to be added to the internal hash table. */
if ( ft_memcmp( name, "COMMENT", 7 ) != 0 ) {
/* Add the property to the font property table. */
error = hash_insert( fp->name,
(void *)font->props_used,
(hashtable *)font->internal,
memory );
if ( error )
goto Exit;
}
font->props_used++;
/* Some special cases need to be handled here. The DEFAULT_CHAR */
/* property needs to be located if it exists in the property list, the */
/* FONT_ASCENT and FONT_DESCENT need to be assigned if they are */
/* present, and the SPACING property should override the default */
/* spacing. */
if ( ft_memcmp( name, "DEFAULT_CHAR", 12 ) == 0 )
font->default_char = fp->value.int32;
else if ( ft_memcmp( name, "FONT_ASCENT", 11 ) == 0 )
font->font_ascent = fp->value.int32;
else if ( ft_memcmp( name, "FONT_DESCENT", 12 ) == 0 )
font->font_descent = fp->value.int32;
else if ( ft_memcmp( name, "SPACING", 7 ) == 0 )
{
if ( fp->value.atom[0] == 'p' || fp->value.atom[0] == 'P' )
font->spacing = BDF_PROPORTIONAL;
else if ( fp->value.atom[0] == 'm' || fp->value.atom[0] == 'M' )
font->spacing = BDF_MONOWIDTH;
else if ( fp->value.atom[0] == 'c' || fp->value.atom[0] == 'C' )
font->spacing = BDF_CHARCELL;
}
Exit:
return error;
}
static const unsigned char nibble_mask[8] =
{
0xFF, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE
};
/* Actually parse the glyph info and bitmaps. */
static FT_Error
_bdf_parse_glyphs( char* line,
unsigned long linelen,
unsigned long lineno,
void* call_data,
void* client_data )
{
int c, mask_index;
char* s;
unsigned char* bp;
unsigned long i, slen, nibbles;
_bdf_parse_t* p;
bdf_glyph_t* glyph;
bdf_font_t* font;
FT_Memory memory;
FT_Error error = BDF_Err_Ok;
FT_UNUSED( call_data );
FT_UNUSED( lineno ); /* only used in debug mode */
p = (_bdf_parse_t *)client_data;
font = p->font;
memory = font->memory;
/* Check for a comment. */
if ( ft_memcmp( line, "COMMENT", 7 ) == 0 )
{
linelen -= 7;
s = line + 7;
if ( *s != 0 )
{
s++;
linelen--;
}
error = _bdf_add_comment( p->font, s, linelen );
goto Exit;
}
/* The very first thing expected is the number of glyphs. */
if ( !( p->flags & _BDF_GLYPHS ) )
{
if ( ft_memcmp( line, "CHARS", 5 ) != 0 )
{
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG1, lineno, "CHARS" ));
error = BDF_Err_Missing_Chars_Field;
goto Exit;
}
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
p->cnt = font->glyphs_size = _bdf_atoul( p->list.field[1], 0, 10 );
/* Make sure the number of glyphs is non-zero. */
if ( p->cnt == 0 )
font->glyphs_size = 64;
if ( FT_NEW_ARRAY( font->glyphs, font->glyphs_size ) )
goto Exit;
p->flags |= _BDF_GLYPHS;
goto Exit;
}
/* Check for the ENDFONT field. */
if ( ft_memcmp( line, "ENDFONT", 7 ) == 0 )
{
/* Sort the glyphs by encoding. */
ft_qsort( (char *)font->glyphs,
font->glyphs_used,
sizeof ( bdf_glyph_t ),
by_encoding );
p->flags &= ~_BDF_START;
goto Exit;
}
/* Check for the ENDCHAR field. */
if ( ft_memcmp( line, "ENDCHAR", 7 ) == 0 )
{
p->glyph_enc = 0;
p->flags &= ~_BDF_GLYPH_BITS;
goto Exit;
}
/* Check to see whether a glyph is being scanned but should be */
/* ignored because it is an unencoded glyph. */
if ( ( p->flags & _BDF_GLYPH ) &&
p->glyph_enc == -1 &&
p->opts->keep_unencoded == 0 )
goto Exit;
/* Check for the STARTCHAR field. */
if ( ft_memcmp( line, "STARTCHAR", 9 ) == 0 )
{
/* Set the character name in the parse info first until the */
/* encoding can be checked for an unencoded character. */
FT_FREE( p->glyph_name );
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
_bdf_list_shift( &p->list, 1 );
s = _bdf_list_join( &p->list, ' ', &slen );
if ( FT_NEW_ARRAY( p->glyph_name, slen + 1 ) )
goto Exit;
FT_MEM_COPY( p->glyph_name, s, slen + 1 );
p->flags |= _BDF_GLYPH;
goto Exit;
}
/* Check for the ENCODING field. */
if ( ft_memcmp( line, "ENCODING", 8 ) == 0 )
{
if ( !( p->flags & _BDF_GLYPH ) )
{
/* Missing STARTCHAR field. */
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG1, lineno, "STARTCHAR" ));
error = BDF_Err_Missing_Startchar_Field;
goto Exit;
}
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
p->glyph_enc = _bdf_atol( p->list.field[1], 0, 10 );
/* Check that the encoding is in the range [0,65536] because */
/* otherwise p->have (a bitmap with static size) overflows. */
if ( (size_t)p->glyph_enc >= sizeof ( p->have ) * 8 )
{
error = BDF_Err_Invalid_File_Format;
goto Exit;
}
/* Check to see whether this encoding has already been encountered. */
/* If it has then change it to unencoded so it gets added if */
/* indicated. */
if ( p->glyph_enc >= 0 )
{
if ( _bdf_glyph_modified( p->have, p->glyph_enc ) )
{
/* Emit a message saying a glyph has been moved to the */
/* unencoded area. */
FT_TRACE2(( "_bdf_parse_glyphs: " ACMSG12,
p->glyph_enc, p->glyph_name ));
p->glyph_enc = -1;
font->modified = 1;
}
else
_bdf_set_glyph_modified( p->have, p->glyph_enc );
}
if ( p->glyph_enc >= 0 )
{
/* Make sure there are enough glyphs allocated in case the */
/* number of characters happen to be wrong. */
if ( font->glyphs_used == font->glyphs_size )
{
if ( FT_RENEW_ARRAY( font->glyphs,
font->glyphs_size,
font->glyphs_size + 64 ) )
goto Exit;
font->glyphs_size += 64;
}
glyph = font->glyphs + font->glyphs_used++;
glyph->name = p->glyph_name;
glyph->encoding = p->glyph_enc;
/* Reset the initial glyph info. */
p->glyph_name = 0;
}
else
{
/* Unencoded glyph. Check to see whether it should */
/* be added or not. */
if ( p->opts->keep_unencoded != 0 )
{
/* Allocate the next unencoded glyph. */
if ( font->unencoded_used == font->unencoded_size )
{
if ( FT_RENEW_ARRAY( font->unencoded ,
font->unencoded_size,
font->unencoded_size + 4 ) )
goto Exit;
font->unencoded_size += 4;
}
glyph = font->unencoded + font->unencoded_used;
glyph->name = p->glyph_name;
glyph->encoding = font->unencoded_used++;
}
else
/* Free up the glyph name if the unencoded shouldn't be */
/* kept. */
FT_FREE( p->glyph_name );
p->glyph_name = 0;
}
/* Clear the flags that might be added when width and height are */
/* checked for consistency. */
p->flags &= ~( _BDF_GLYPH_WIDTH_CHECK | _BDF_GLYPH_HEIGHT_CHECK );
p->flags |= _BDF_ENCODING;
goto Exit;
}
/* Point at the glyph being constructed. */
if ( p->glyph_enc == -1 )
glyph = font->unencoded + ( font->unencoded_used - 1 );
else
glyph = font->glyphs + ( font->glyphs_used - 1 );
/* Check to see whether a bitmap is being constructed. */
if ( p->flags & _BDF_BITMAP )
{
/* If there are more rows than are specified in the glyph metrics, */
/* ignore the remaining lines. */
if ( p->row >= (unsigned long)glyph->bbx.height )
{
if ( !( p->flags & _BDF_GLYPH_HEIGHT_CHECK ) )
{
FT_TRACE2(( "_bdf_parse_glyphs: " ACMSG13, glyph->encoding ));
p->flags |= _BDF_GLYPH_HEIGHT_CHECK;
font->modified = 1;
}
goto Exit;
}
/* Only collect the number of nibbles indicated by the glyph */
/* metrics. If there are more columns, they are simply ignored. */
nibbles = glyph->bpr << 1;
bp = glyph->bitmap + p->row * glyph->bpr;
for ( i = 0; i < nibbles; i++ )
{
c = line[i];
*bp = (FT_Byte)( ( *bp << 4 ) + a2i[c] );
if ( i + 1 < nibbles && ( i & 1 ) )
*++bp = 0;
}
/* Remove possible garbage at the right. */
mask_index = ( glyph->bbx.width * p->font->bpp ) & 7;
if ( glyph->bbx.width )
*bp &= nibble_mask[mask_index];
/* If any line has extra columns, indicate they have been removed. */
if ( ( line[nibbles] == '0' || a2i[(int)line[nibbles]] != 0 ) &&
!( p->flags & _BDF_GLYPH_WIDTH_CHECK ) )
{
FT_TRACE2(( "_bdf_parse_glyphs: " ACMSG14, glyph->encoding ));
p->flags |= _BDF_GLYPH_WIDTH_CHECK;
font->modified = 1;
}
p->row++;
goto Exit;
}
/* Expect the SWIDTH (scalable width) field next. */
if ( ft_memcmp( line, "SWIDTH", 6 ) == 0 )
{
if ( !( p->flags & _BDF_ENCODING ) )
{
/* Missing ENCODING field. */
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG1, lineno, "ENCODING" ));
error = BDF_Err_Missing_Encoding_Field;
goto Exit;
}
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
glyph->swidth = (unsigned short)_bdf_atoul( p->list.field[1], 0, 10 );
p->flags |= _BDF_SWIDTH;
goto Exit;
}
/* Expect the DWIDTH (scalable width) field next. */
if ( ft_memcmp( line, "DWIDTH", 6 ) == 0 )
{
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
glyph->dwidth = (unsigned short)_bdf_atoul( p->list.field[1], 0, 10 );
if ( !( p->flags & _BDF_SWIDTH ) )
{
/* Missing SWIDTH field. Emit an auto correction message and set */
/* the scalable width from the device width. */
FT_TRACE2(( "_bdf_parse_glyphs: " ACMSG9, lineno ));
glyph->swidth = (unsigned short)FT_MulDiv(
glyph->dwidth, 72000L,
(FT_Long)( font->point_size *
font->resolution_x ) );
}
p->flags |= _BDF_DWIDTH;
goto Exit;
}
/* Expect the BBX field next. */
if ( ft_memcmp( line, "BBX", 3 ) == 0 )
{
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
glyph->bbx.width = _bdf_atos( p->list.field[1], 0, 10 );
glyph->bbx.height = _bdf_atos( p->list.field[2], 0, 10 );
glyph->bbx.x_offset = _bdf_atos( p->list.field[3], 0, 10 );
glyph->bbx.y_offset = _bdf_atos( p->list.field[4], 0, 10 );
/* Generate the ascent and descent of the character. */
glyph->bbx.ascent = (short)( glyph->bbx.height + glyph->bbx.y_offset );
glyph->bbx.descent = (short)( -glyph->bbx.y_offset );
/* Determine the overall font bounding box as the characters are */
/* loaded so corrections can be done later if indicated. */
p->maxas = (short)FT_MAX( glyph->bbx.ascent, p->maxas );
p->maxds = (short)FT_MAX( glyph->bbx.descent, p->maxds );
p->rbearing = (short)( glyph->bbx.width + glyph->bbx.x_offset );
p->maxrb = (short)FT_MAX( p->rbearing, p->maxrb );
p->minlb = (short)FT_MIN( glyph->bbx.x_offset, p->minlb );
p->maxlb = (short)FT_MAX( glyph->bbx.x_offset, p->maxlb );
if ( !( p->flags & _BDF_DWIDTH ) )
{
/* Missing DWIDTH field. Emit an auto correction message and set */
/* the device width to the glyph width. */
FT_TRACE2(( "_bdf_parse_glyphs: " ACMSG10, lineno ));
glyph->dwidth = glyph->bbx.width;
}
/* If the BDF_CORRECT_METRICS flag is set, then adjust the SWIDTH */
/* value if necessary. */
if ( p->opts->correct_metrics != 0 )
{
/* Determine the point size of the glyph. */
unsigned short sw = (unsigned short)FT_MulDiv(
glyph->dwidth, 72000L,
(FT_Long)( font->point_size *
font->resolution_x ) );
if ( sw != glyph->swidth )
{
glyph->swidth = sw;
if ( p->glyph_enc == -1 )
_bdf_set_glyph_modified( font->umod,
font->unencoded_used - 1 );
else
_bdf_set_glyph_modified( font->nmod, glyph->encoding );
p->flags |= _BDF_SWIDTH_ADJ;
font->modified = 1;
}
}
p->flags |= _BDF_BBX;
goto Exit;
}
/* And finally, gather up the bitmap. */
if ( ft_memcmp( line, "BITMAP", 6 ) == 0 )
{
unsigned long bitmap_size;
if ( !( p->flags & _BDF_BBX ) )
{
/* Missing BBX field. */
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG1, lineno, "BBX" ));
error = BDF_Err_Missing_Bbx_Field;
goto Exit;
}
/* Allocate enough space for the bitmap. */
glyph->bpr = ( glyph->bbx.width * p->font->bpp + 7 ) >> 3;
bitmap_size = glyph->bpr * glyph->bbx.height;
if ( bitmap_size > 0xFFFFU )
{
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG4, lineno ));
error = BDF_Err_Bbx_Too_Big;
goto Exit;
}
else
glyph->bytes = (unsigned short)bitmap_size;
if ( FT_NEW_ARRAY( glyph->bitmap, glyph->bytes ) )
goto Exit;
p->row = 0;
p->flags |= _BDF_BITMAP;
goto Exit;
}
error = BDF_Err_Invalid_File_Format;
Exit:
return error;
}
/* Load the font properties. */
static FT_Error
_bdf_parse_properties( char* line,
unsigned long linelen,
unsigned long lineno,
void* call_data,
void* client_data )
{
unsigned long vlen;
_bdf_line_func_t* next;
_bdf_parse_t* p;
char* name;
char* value;
char nbuf[128];
FT_Error error = BDF_Err_Ok;
FT_UNUSED( lineno );
next = (_bdf_line_func_t *)call_data;
p = (_bdf_parse_t *) client_data;
/* Check for the end of the properties. */
if ( ft_memcmp( line, "ENDPROPERTIES", 13 ) == 0 )
{
/* If the FONT_ASCENT or FONT_DESCENT properties have not been */
/* encountered yet, then make sure they are added as properties and */
/* make sure they are set from the font bounding box info. */
/* */
/* This is *always* done regardless of the options, because X11 */
/* requires these two fields to compile fonts. */
if ( bdf_get_font_property( p->font, "FONT_ASCENT" ) == 0 )
{
p->font->font_ascent = p->font->bbx.ascent;
ft_sprintf( nbuf, "%hd", p->font->bbx.ascent );
error = _bdf_add_property( p->font, (char *)"FONT_ASCENT", nbuf );
if ( error )
goto Exit;
FT_TRACE2(( "_bdf_parse_properties: " ACMSG1, p->font->bbx.ascent ));
p->font->modified = 1;
}
if ( bdf_get_font_property( p->font, "FONT_DESCENT" ) == 0 )
{
p->font->font_descent = p->font->bbx.descent;
ft_sprintf( nbuf, "%hd", p->font->bbx.descent );
error = _bdf_add_property( p->font, (char *)"FONT_DESCENT", nbuf );
if ( error )
goto Exit;
FT_TRACE2(( "_bdf_parse_properties: " ACMSG2, p->font->bbx.descent ));
p->font->modified = 1;
}
p->flags &= ~_BDF_PROPS;
*next = _bdf_parse_glyphs;
goto Exit;
}
/* Ignore the _XFREE86_GLYPH_RANGES properties. */
if ( ft_memcmp( line, "_XFREE86_GLYPH_RANGES", 21 ) == 0 )
goto Exit;
/* Handle COMMENT fields and properties in a special way to preserve */
/* the spacing. */
if ( ft_memcmp( line, "COMMENT", 7 ) == 0 )
{
name = value = line;
value += 7;
if ( *value )
*value++ = 0;
error = _bdf_add_property( p->font, name, value );
if ( error )
goto Exit;
}
else if ( _bdf_is_atom( line, linelen, &name, &value, p->font ) )
{
error = _bdf_add_property( p->font, name, value );
if ( error )
goto Exit;
}
else
{
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
name = p->list.field[0];
_bdf_list_shift( &p->list, 1 );
value = _bdf_list_join( &p->list, ' ', &vlen );
error = _bdf_add_property( p->font, name, value );
if ( error )
goto Exit;
}
Exit:
return error;
}
/* Load the font header. */
static FT_Error
_bdf_parse_start( char* line,
unsigned long linelen,
unsigned long lineno,
void* call_data,
void* client_data )
{
unsigned long slen;
_bdf_line_func_t* next;
_bdf_parse_t* p;
bdf_font_t* font;
char *s;
FT_Memory memory = NULL;
FT_Error error = BDF_Err_Ok;
FT_UNUSED( lineno ); /* only used in debug mode */
next = (_bdf_line_func_t *)call_data;
p = (_bdf_parse_t *) client_data;
if ( p->font )
memory = p->font->memory;
/* Check for a comment. This is done to handle those fonts that have */
/* comments before the STARTFONT line for some reason. */
if ( ft_memcmp( line, "COMMENT", 7 ) == 0 )
{
if ( p->opts->keep_comments != 0 && p->font != 0 )
{
linelen -= 7;
s = line + 7;
if ( *s != 0 )
{
s++;
linelen--;
}
error = _bdf_add_comment( p->font, s, linelen );
if ( error )
goto Exit;
/* here font is not defined! */
}
goto Exit;
}
if ( !( p->flags & _BDF_START ) )
{
memory = p->memory;
if ( ft_memcmp( line, "STARTFONT", 9 ) != 0 )
{
/* No STARTFONT field is a good indication of a problem. */
error = BDF_Err_Missing_Startfont_Field;
goto Exit;
}
p->flags = _BDF_START;
font = p->font = 0;
if ( FT_NEW( font ) )
goto Exit;
p->font = font;
font->memory = p->memory;
p->memory = 0;
{ /* setup */
unsigned long i;
bdf_property_t* prop;
error = hash_init( &(font->proptbl), memory );
if ( error )
goto Exit;
for ( i = 0, prop = (bdf_property_t*)_bdf_properties;
i < _num_bdf_properties; i++, prop++ )
{
error = hash_insert( prop->name, (void *)i,
&(font->proptbl), memory );
if ( error )
goto Exit;
}
}
if ( FT_ALLOC( p->font->internal, sizeof ( hashtable ) ) )
goto Exit;
error = hash_init( (hashtable *)p->font->internal,memory );
if ( error )
goto Exit;
p->font->spacing = p->opts->font_spacing;
p->font->default_char = -1;
goto Exit;
}
/* Check for the start of the properties. */
if ( ft_memcmp( line, "STARTPROPERTIES", 15 ) == 0 )
{
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
p->cnt = p->font->props_size = _bdf_atoul( p->list.field[1], 0, 10 );
if ( FT_NEW_ARRAY( p->font->props, p->cnt ) )
goto Exit;
p->flags |= _BDF_PROPS;
*next = _bdf_parse_properties;
goto Exit;
}
/* Check for the FONTBOUNDINGBOX field. */
if ( ft_memcmp( line, "FONTBOUNDINGBOX", 15 ) == 0 )
{
if ( !(p->flags & _BDF_SIZE ) )
{
/* Missing the SIZE field. */
FT_ERROR(( "_bdf_parse_start: " ERRMSG1, lineno, "SIZE" ));
error = BDF_Err_Missing_Size_Field;
goto Exit;
}
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
p->font->bbx.width = _bdf_atos( p->list.field[1], 0, 10 );
p->font->bbx.height = _bdf_atos( p->list.field[2], 0, 10 );
p->font->bbx.x_offset = _bdf_atos( p->list.field[3], 0, 10 );
p->font->bbx.y_offset = _bdf_atos( p->list.field[4], 0, 10 );
p->font->bbx.ascent = (short)( p->font->bbx.height +
p->font->bbx.y_offset );
p->font->bbx.descent = (short)( -p->font->bbx.y_offset );
p->flags |= _BDF_FONT_BBX;
goto Exit;
}
/* The next thing to check for is the FONT field. */
if ( ft_memcmp( line, "FONT", 4 ) == 0 )
{
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
_bdf_list_shift( &p->list, 1 );
s = _bdf_list_join( &p->list, ' ', &slen );
if ( FT_NEW_ARRAY( p->font->name, slen + 1 ) )
goto Exit;
FT_MEM_COPY( p->font->name, s, slen + 1 );
/* If the font name is an XLFD name, set the spacing to the one in */
/* the font name. If there is no spacing fall back on the default. */
error = _bdf_set_default_spacing( p->font, p->opts );
if ( error )
goto Exit;
p->flags |= _BDF_FONT_NAME;
goto Exit;
}
/* Check for the SIZE field. */
if ( ft_memcmp( line, "SIZE", 4 ) == 0 )
{
if ( !( p->flags & _BDF_FONT_NAME ) )
{
/* Missing the FONT field. */
FT_ERROR(( "_bdf_parse_start: " ERRMSG1, lineno, "FONT" ));
error = BDF_Err_Missing_Font_Field;
goto Exit;
}
error = _bdf_list_split( &p->list, (char *)" +", line, linelen );
if ( error )
goto Exit;
p->font->point_size = _bdf_atoul( p->list.field[1], 0, 10 );
p->font->resolution_x = _bdf_atoul( p->list.field[2], 0, 10 );
p->font->resolution_y = _bdf_atoul( p->list.field[3], 0, 10 );
/* Check for the bits per pixel field. */
if ( p->list.used == 5 )
{
unsigned short bitcount, i, shift;
p->font->bpp = (unsigned short)_bdf_atos( p->list.field[4], 0, 10 );
/* Only values 1, 2, 4, 8 are allowed. */
shift = p->font->bpp;
bitcount = 0;
for ( i = 0; shift > 0; i++ )
{
if ( shift & 1 )
bitcount = i;
shift >>= 1;
}
shift = (short)( ( bitcount > 3 ) ? 8 : ( 1 << bitcount ) );
if ( p->font->bpp > shift || p->font->bpp != shift )
{
/* select next higher value */
p->font->bpp = (unsigned short)( shift << 1 );
FT_TRACE2(( "_bdf_parse_start: " ACMSG11, p->font->bpp ));
}
}
else
p->font->bpp = 1;
p->flags |= _BDF_SIZE;
goto Exit;
}
error = BDF_Err_Invalid_File_Format;
Exit:
return error;
}
/*************************************************************************/
/* */
/* API. */
/* */
/*************************************************************************/
FT_LOCAL_DEF( FT_Error )
bdf_load_font( FT_Stream stream,
FT_Memory extmemory,
bdf_options_t* opts,
bdf_font_t* *font )
{
unsigned long lineno;
_bdf_parse_t *p;
FT_Memory memory = extmemory;
FT_Error error = BDF_Err_Ok;
if ( FT_NEW( p ) )
goto Exit;
memory = NULL;
p->opts = (bdf_options_t*)( ( opts != 0 ) ? opts : &_bdf_opts );
p->minlb = 32767;
p->memory = extmemory; /* only during font creation */
_bdf_list_init( &p->list, extmemory );
error = _bdf_readstream( stream, _bdf_parse_start,
(void *)p, &lineno );
if ( error )
goto Exit;
if ( p->font != 0 )
{
/* If the font is not proportional, set the font's monowidth */
/* field to the width of the font bounding box. */
memory = p->font->memory;
if ( p->font->spacing != BDF_PROPORTIONAL )
p->font->monowidth = p->font->bbx.width;
/* If the number of glyphs loaded is not that of the original count, */
/* indicate the difference. */
if ( p->cnt != p->font->glyphs_used + p->font->unencoded_used )
{
FT_TRACE2(( "bdf_load_font: " ACMSG15, p->cnt,
p->font->glyphs_used + p->font->unencoded_used ));
p->font->modified = 1;
}
/* Once the font has been loaded, adjust the overall font metrics if */
/* necessary. */
if ( p->opts->correct_metrics != 0 &&
( p->font->glyphs_used > 0 || p->font->unencoded_used > 0 ) )
{
if ( p->maxrb - p->minlb != p->font->bbx.width )
{
FT_TRACE2(( "bdf_load_font: " ACMSG3,
p->font->bbx.width, p->maxrb - p->minlb ));
p->font->bbx.width = (unsigned short)( p->maxrb - p->minlb );
p->font->modified = 1;
}
if ( p->font->bbx.x_offset != p->minlb )
{
FT_TRACE2(( "bdf_load_font: " ACMSG4,
p->font->bbx.x_offset, p->minlb ));
p->font->bbx.x_offset = p->minlb;
p->font->modified = 1;
}
if ( p->font->bbx.ascent != p->maxas )
{
FT_TRACE2(( "bdf_load_font: " ACMSG5,
p->font->bbx.ascent, p->maxas ));
p->font->bbx.ascent = p->maxas;
p->font->modified = 1;
}
if ( p->font->bbx.descent != p->maxds )
{
FT_TRACE2(( "bdf_load_font: " ACMSG6,
p->font->bbx.descent, p->maxds ));
p->font->bbx.descent = p->maxds;
p->font->bbx.y_offset = (short)( -p->maxds );
p->font->modified = 1;
}
if ( p->maxas + p->maxds != p->font->bbx.height )
{
FT_TRACE2(( "bdf_load_font: " ACMSG7,
p->font->bbx.height, p->maxas + p->maxds ));
p->font->bbx.height = (unsigned short)( p->maxas + p->maxds );
}
if ( p->flags & _BDF_SWIDTH_ADJ )
FT_TRACE2(( "bdf_load_font: " ACMSG8 ));
}
}
if ( p->flags & _BDF_START )
{
{
/* The ENDFONT field was never reached or did not exist. */
if ( !( p->flags & _BDF_GLYPHS ) )
/* Error happened while parsing header. */
FT_ERROR(( "bdf_load_font: " ERRMSG2, lineno ));
else
/* Error happened when parsing glyphs. */
FT_ERROR(( "bdf_load_font: " ERRMSG3, lineno ));
}
}
if ( p->font != 0 )
{
/* Make sure the comments are NULL terminated if they exist. */
memory = p->font->memory;
if ( p->font->comments_len > 0 ) {
if ( FT_RENEW_ARRAY( p->font->comments,
p->font->comments_len,
p->font->comments_len + 1 ) )
goto Exit;
p->font->comments[p->font->comments_len] = 0;
}
}
else if ( error == BDF_Err_Ok )
error = BDF_Err_Invalid_File_Format;
*font = p->font;
Exit:
if ( p )
{
_bdf_list_done( &p->list );
memory = extmemory;
FT_FREE( p );
}
return error;
}
FT_LOCAL_DEF( void )
bdf_free_font( bdf_font_t* font )
{
bdf_property_t* prop;
unsigned long i;
bdf_glyph_t* glyphs;
FT_Memory memory;
if ( font == 0 )
return;
memory = font->memory;
FT_FREE( font->name );
/* Free up the internal hash table of property names. */
if ( font->internal )
{
hash_free( (hashtable *)font->internal, memory );
FT_FREE( font->internal );
}
/* Free up the comment info. */
FT_FREE( font->comments );
/* Free up the properties. */
for ( i = 0; i < font->props_size; i++ )
{
if ( font->props[i].format == BDF_ATOM )
FT_FREE( font->props[i].value.atom );
}
FT_FREE( font->props );
/* Free up the character info. */
for ( i = 0, glyphs = font->glyphs;
i < font->glyphs_used; i++, glyphs++ )
{
FT_FREE( glyphs->name );
FT_FREE( glyphs->bitmap );
}
for ( i = 0, glyphs = font->unencoded; i < font->unencoded_used;
i++, glyphs++ )
{
FT_FREE( glyphs->name );
FT_FREE( glyphs->bitmap );
}
FT_FREE( font->glyphs );
FT_FREE( font->unencoded );
/* Free up the overflow storage if it was used. */
for ( i = 0, glyphs = font->overflow.glyphs;
i < font->overflow.glyphs_used; i++, glyphs++ )
{
FT_FREE( glyphs->name );
FT_FREE( glyphs->bitmap );
}
FT_FREE( font->overflow.glyphs );
/* bdf_cleanup */
hash_free( &(font->proptbl), memory );
/* Free up the user defined properties. */
for (prop = font->user_props, i = 0;
i < font->nuser_props; i++, prop++ )
{
FT_FREE( prop->name );
if ( prop->format == BDF_ATOM )
FT_FREE( prop->value.atom );
}
FT_FREE( font->user_props );
/* FREE( font ); */ /* XXX Fixme */
}
FT_LOCAL_DEF( bdf_property_t * )
bdf_get_font_property( bdf_font_t* font,
const char* name )
{
hashnode hn;
if ( font == 0 || font->props_size == 0 || name == 0 || *name == 0 )
return 0;
hn = hash_lookup( name, (hashtable *)font->internal );
return hn ? ( font->props + (unsigned long)hn->data ) : 0;
}
/* END */