ref: 4c0db60772af8132d7748e8f269f79eb533958d5
dir: /src/bdf/bdflib.c/
/*
* Copyright 2000 Computing Research Labs, New Mexico State University
* Copyright 2001-2014
* 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 <freetype/freetype.h>
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/ftstream.h>
#include <freetype/internal/ftobjs.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 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[] =
{
{ "ADD_STYLE_NAME", BDF_ATOM, 1, { 0 } },
{ "AVERAGE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ "AVG_CAPITAL_WIDTH", BDF_INTEGER, 1, { 0 } },
{ "AVG_LOWERCASE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ "CAP_HEIGHT", BDF_INTEGER, 1, { 0 } },
{ "CHARSET_COLLECTIONS", BDF_ATOM, 1, { 0 } },
{ "CHARSET_ENCODING", BDF_ATOM, 1, { 0 } },
{ "CHARSET_REGISTRY", BDF_ATOM, 1, { 0 } },
{ "COMMENT", BDF_ATOM, 1, { 0 } },
{ "COPYRIGHT", BDF_ATOM, 1, { 0 } },
{ "DEFAULT_CHAR", BDF_CARDINAL, 1, { 0 } },
{ "DESTINATION", BDF_CARDINAL, 1, { 0 } },
{ "DEVICE_FONT_NAME", BDF_ATOM, 1, { 0 } },
{ "END_SPACE", BDF_INTEGER, 1, { 0 } },
{ "FACE_NAME", BDF_ATOM, 1, { 0 } },
{ "FAMILY_NAME", BDF_ATOM, 1, { 0 } },
{ "FIGURE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ "FONT", BDF_ATOM, 1, { 0 } },
{ "FONTNAME_REGISTRY", BDF_ATOM, 1, { 0 } },
{ "FONT_ASCENT", BDF_INTEGER, 1, { 0 } },
{ "FONT_DESCENT", BDF_INTEGER, 1, { 0 } },
{ "FOUNDRY", BDF_ATOM, 1, { 0 } },
{ "FULL_NAME", BDF_ATOM, 1, { 0 } },
{ "ITALIC_ANGLE", BDF_INTEGER, 1, { 0 } },
{ "MAX_SPACE", BDF_INTEGER, 1, { 0 } },
{ "MIN_SPACE", BDF_INTEGER, 1, { 0 } },
{ "NORM_SPACE", BDF_INTEGER, 1, { 0 } },
{ "NOTICE", BDF_ATOM, 1, { 0 } },
{ "PIXEL_SIZE", BDF_INTEGER, 1, { 0 } },
{ "POINT_SIZE", BDF_INTEGER, 1, { 0 } },
{ "QUAD_WIDTH", BDF_INTEGER, 1, { 0 } },
{ "RAW_ASCENT", BDF_INTEGER, 1, { 0 } },
{ "RAW_AVERAGE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ "RAW_AVG_CAPITAL_WIDTH", BDF_INTEGER, 1, { 0 } },
{ "RAW_AVG_LOWERCASE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ "RAW_CAP_HEIGHT", BDF_INTEGER, 1, { 0 } },
{ "RAW_DESCENT", BDF_INTEGER, 1, { 0 } },
{ "RAW_END_SPACE", BDF_INTEGER, 1, { 0 } },
{ "RAW_FIGURE_WIDTH", BDF_INTEGER, 1, { 0 } },
{ "RAW_MAX_SPACE", BDF_INTEGER, 1, { 0 } },
{ "RAW_MIN_SPACE", BDF_INTEGER, 1, { 0 } },
{ "RAW_NORM_SPACE", BDF_INTEGER, 1, { 0 } },
{ "RAW_PIXEL_SIZE", BDF_INTEGER, 1, { 0 } },
{ "RAW_POINT_SIZE", BDF_INTEGER, 1, { 0 } },
{ "RAW_PIXELSIZE", BDF_INTEGER, 1, { 0 } },
{ "RAW_POINTSIZE", BDF_INTEGER, 1, { 0 } },
{ "RAW_QUAD_WIDTH", BDF_INTEGER, 1, { 0 } },
{ "RAW_SMALL_CAP_SIZE", BDF_INTEGER, 1, { 0 } },
{ "RAW_STRIKEOUT_ASCENT", BDF_INTEGER, 1, { 0 } },
{ "RAW_STRIKEOUT_DESCENT", BDF_INTEGER, 1, { 0 } },
{ "RAW_SUBSCRIPT_SIZE", BDF_INTEGER, 1, { 0 } },
{ "RAW_SUBSCRIPT_X", BDF_INTEGER, 1, { 0 } },
{ "RAW_SUBSCRIPT_Y", BDF_INTEGER, 1, { 0 } },
{ "RAW_SUPERSCRIPT_SIZE", BDF_INTEGER, 1, { 0 } },
{ "RAW_SUPERSCRIPT_X", BDF_INTEGER, 1, { 0 } },
{ "RAW_SUPERSCRIPT_Y", BDF_INTEGER, 1, { 0 } },
{ "RAW_UNDERLINE_POSITION", BDF_INTEGER, 1, { 0 } },
{ "RAW_UNDERLINE_THICKNESS", BDF_INTEGER, 1, { 0 } },
{ "RAW_X_HEIGHT", BDF_INTEGER, 1, { 0 } },
{ "RELATIVE_SETWIDTH", BDF_CARDINAL, 1, { 0 } },
{ "RELATIVE_WEIGHT", BDF_CARDINAL, 1, { 0 } },
{ "RESOLUTION", BDF_INTEGER, 1, { 0 } },
{ "RESOLUTION_X", BDF_CARDINAL, 1, { 0 } },
{ "RESOLUTION_Y", BDF_CARDINAL, 1, { 0 } },
{ "SETWIDTH_NAME", BDF_ATOM, 1, { 0 } },
{ "SLANT", BDF_ATOM, 1, { 0 } },
{ "SMALL_CAP_SIZE", BDF_INTEGER, 1, { 0 } },
{ "SPACING", BDF_ATOM, 1, { 0 } },
{ "STRIKEOUT_ASCENT", BDF_INTEGER, 1, { 0 } },
{ "STRIKEOUT_DESCENT", BDF_INTEGER, 1, { 0 } },
{ "SUBSCRIPT_SIZE", BDF_INTEGER, 1, { 0 } },
{ "SUBSCRIPT_X", BDF_INTEGER, 1, { 0 } },
{ "SUBSCRIPT_Y", BDF_INTEGER, 1, { 0 } },
{ "SUPERSCRIPT_SIZE", BDF_INTEGER, 1, { 0 } },
{ "SUPERSCRIPT_X", BDF_INTEGER, 1, { 0 } },
{ "SUPERSCRIPT_Y", BDF_INTEGER, 1, { 0 } },
{ "UNDERLINE_POSITION", BDF_INTEGER, 1, { 0 } },
{ "UNDERLINE_THICKNESS", BDF_INTEGER, 1, { 0 } },
{ "WEIGHT", BDF_CARDINAL, 1, { 0 } },
{ "WEIGHT_NAME", BDF_ATOM, 1, { 0 } },
{ "X_HEIGHT", BDF_INTEGER, 1, { 0 } },
{ "_MULE_BASELINE_OFFSET", BDF_INTEGER, 1, { 0 } },
{ "_MULE_RELATIVE_COMPOSE", BDF_INTEGER, 1, { 0 } },
};
static const unsigned long
_num_bdf_properties = sizeof ( _bdf_properties ) /
sizeof ( _bdf_properties[0] );
/* An auxiliary macro to parse properties, to be used in conditionals. */
/* It behaves like `strncmp' but also tests the following character */
/* whether it is a whitespace or null. */
/* `property' is a constant string of length `n' to compare with. */
#define _bdf_strncmp( name, property, n ) \
( ft_strncmp( name, property, n ) || \
!( name[n] == ' ' || \
name[n] == '\0' || \
name[n] == '\n' || \
name[n] == '\r' || \
name[n] == '\t' ) )
/* 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: %d New: %d.\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: %d New: %d.\n"
#define ACMSG7 "Font height != actual height. Old: %d New: %d.\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 ACMSG13 "Glyph %lu extra rows removed.\n"
#define ACMSG14 "Glyph %lu extra columns removed.\n"
#define ACMSG15 "Incorrect glyph count: %ld indicated but %ld found.\n"
#define ACMSG16 "Glyph %lu missing columns padded with zero bits.\n"
#define ACMSG17 "Adjusting number of glyphs to %ld.\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"
#define ERRMSG5 "[line %ld] `%s' value too big.\n"
#define ERRMSG6 "[line %ld] Input line too long.\n"
#define ERRMSG7 "[line %ld] Font name too long.\n"
#define ERRMSG8 "[line %ld] Invalid `%s' value.\n"
#define ERRMSG9 "[line %ld] Invalid keyword.\n"
/* Debug messages. */
#define DBGMSG1 " [%6ld] %s" /* no \n */
#define DBGMSG2 " (0x%lX)\n"
/**************************************************************************
*
* 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;
_bdf_list_t list;
FT_Memory memory;
unsigned long size; /* the stream size */
} _bdf_parse_t;
#define setsbit( m, cc ) \
( m[(FT_Byte)(cc) >> 3] |= (FT_Byte)( 1 << ( (cc) & 7 ) ) )
#define sbitset( m, cc ) \
( m[(FT_Byte)(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,
unsigned long num_items ) /* same as _bdf_list_t.used */
{
FT_Error error = FT_Err_Ok;
if ( num_items > list->size )
{
unsigned long oldsize = list->size; /* same as _bdf_list_t.size */
unsigned long newsize = oldsize + ( oldsize >> 1 ) + 5;
unsigned long bigsize = (unsigned long)( FT_INT_MAX / sizeof ( char* ) );
FT_Memory memory = list->memory;
if ( oldsize == bigsize )
{
error = FT_THROW( Out_Of_Memory );
goto Exit;
}
else if ( newsize < oldsize || newsize > bigsize )
newsize = bigsize;
if ( FT_QRENEW_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 == NULL || 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;
}
/* An empty string for empty fields. */
static const char empty[] = ""; /* XXX eliminate this */
static char *
_bdf_list_join( _bdf_list_t* list,
int c,
unsigned long *alen )
{
unsigned long i, j;
char* dp;
*alen = 0;
if ( list == NULL || list->used == 0 )
return 0;
dp = list->field[0];
for ( i = j = 0; i < list->used; i++ )
{
char* fp = list->field[i];
while ( *fp )
dp[j++] = *fp++;
if ( i + 1 < list->used )
dp[j++] = (char)c;
}
if ( dp != empty )
dp[j] = 0;
*alen = j;
return dp;
}
/* The code below ensures that we have at least 4 + 1 `field' */
/* elements in `list' (which are possibly NULL) so that we */
/* don't have to check the number of fields in most cases. */
static FT_Error
_bdf_list_split( _bdf_list_t* list,
const char* separators,
char* line,
unsigned long linelen )
{
unsigned long final_empty;
int mult;
const char *sp, *end;
char *ep;
char seps[32];
FT_Error error = FT_Err_Ok;
/* Initialize the list. */
list->used = 0;
if ( list->size )
{
list->field[0] = (char*)empty;
list->field[1] = (char*)empty;
list->field[2] = (char*)empty;
list->field[3] = (char*)empty;
list->field[4] = (char*)empty;
}
/* 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 == NULL || *separators == 0 )
{
error = FT_THROW( 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 ) ? (char*)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] = NULL;
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, hold, to_skip;
ptrdiff_t bytes, start, end, cursor, avail;
char* buf = NULL;
FT_Memory memory = stream->memory;
FT_Error error = FT_Err_Ok;
if ( callback == NULL )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
/* initial size and allocation of the input buffer */
buf_size = 1024;
if ( FT_QALLOC( buf, buf_size ) )
goto Exit;
cb = callback;
lineno = 1;
buf[0] = 0;
start = 0;
avail = 0;
cursor = 0;
refill = 1;
to_skip = NO_SKIP;
bytes = 0; /* make compiler happy */
for (;;)
{
if ( refill )
{
bytes = (ptrdiff_t)FT_Stream_TryRead(
stream, (FT_Byte*)buf + cursor,
buf_size - (unsigned long)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; */
/* ignore it then exit */
if ( lineno == 1 )
error = FT_THROW( Missing_Startfont_Field );
break;
}
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 */
{
if ( lineno == 1 )
error = FT_THROW( Missing_Startfont_Field );
else
{
FT_ERROR(( "_bdf_readstream: " ERRMSG6, lineno ));
error = FT_THROW( Invalid_Argument );
}
goto Exit;
}
new_size = buf_size * 2;
if ( FT_QREALLOC( buf, buf_size, new_size ) )
goto Exit;
cursor = avail;
buf_size = new_size;
}
else
{
bytes = avail - start;
FT_MEM_MOVE( buf, buf + start, bytes );
cursor = 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, (unsigned long)( end - start ), lineno,
(void*)&cb, client_data );
/* Redo if we have encountered CHARS without properties. */
if ( error == -1 )
error = (*cb)( buf + start, (unsigned long)( 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 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,
};
/* Routine to convert a decimal ASCII string to an unsigned long integer. */
static unsigned long
_bdf_atoul( const char* s )
{
unsigned long v;
if ( s == NULL || *s == 0 )
return 0;
for ( v = 0; sbitset( ddigits, *s ); s++ )
{
if ( v < ( FT_ULONG_MAX - 9 ) / 10 )
v = v * 10 + a2i[(int)*s];
else
{
v = FT_ULONG_MAX;
break;
}
}
return v;
}
/* Routine to convert a decimal ASCII string to a signed long integer. */
static long
_bdf_atol( const char* s )
{
long v, neg;
if ( s == NULL || *s == 0 )
return 0;
/* Check for a minus sign. */
neg = 0;
if ( *s == '-' )
{
s++;
neg = 1;
}
for ( v = 0; sbitset( ddigits, *s ); s++ )
{
if ( v < ( FT_LONG_MAX - 9 ) / 10 )
v = v * 10 + a2i[(int)*s];
else
{
v = FT_LONG_MAX;
break;
}
}
return ( !neg ) ? v : -v;
}
/* Routine to convert a decimal ASCII string to an unsigned short integer. */
static unsigned short
_bdf_atous( const char* s )
{
unsigned short v;
if ( s == NULL || *s == 0 )
return 0;
for ( v = 0; sbitset( ddigits, *s ); s++ )
{
if ( v < ( FT_USHORT_MAX - 9 ) / 10 )
v = (unsigned short)( v * 10 + a2i[(int)*s] );
else
{
v = FT_USHORT_MAX;
break;
}
}
return v;
}
/* Routine to convert a decimal ASCII string to a signed short integer. */
static short
_bdf_atos( const char* s )
{
short v, neg;
if ( s == NULL || *s == 0 )
return 0;
/* Check for a minus. */
neg = 0;
if ( *s == '-' )
{
s++;
neg = 1;
}
for ( v = 0; sbitset( ddigits, *s ); s++ )
{
if ( v < ( SHRT_MAX - 9 ) / 10 )
v = (short)( v * 10 + a2i[(int)*s] );
else
{
v = SHRT_MAX;
break;
}
}
return (short)( ( !neg ) ? v : -v );
}
/* Routine to compare two glyphs by encoding so they can be sorted. */
FT_COMPARE_DEF( 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( const char* name,
int format,
bdf_font_t* font )
{
size_t n;
bdf_property_t* p;
FT_Memory memory = font->memory;
FT_Error error = FT_Err_Ok;
/* First check whether the property has */
/* already been added or not. If it has, then */
/* simply ignore it. */
if ( ft_hash_str_lookup( name, &(font->proptbl) ) )
goto Exit;
if ( FT_QRENEW_ARRAY( font->user_props,
font->nuser_props,
font->nuser_props + 1 ) )
goto Exit;
p = font->user_props + font->nuser_props;
n = ft_strlen( name ) + 1;
if ( n > FT_LONG_MAX )
return FT_THROW( Invalid_Argument );
if ( FT_QALLOC( p->name, n ) )
goto Exit;
FT_MEM_COPY( (char *)p->name, name, n );
p->format = format;
p->builtin = 0;
p->value.atom = NULL; /* nothing is ever stored here */
n = _num_bdf_properties + font->nuser_props;
error = ft_hash_str_insert( p->name, 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 )
{
size_t* propid;
if ( name == NULL || *name == 0 )
return 0;
if ( ( propid = ft_hash_str_lookup( name, &(font->proptbl) ) ) == NULL )
return 0;
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_ 0x0001U
#define BDF_FONT_NAME_ 0x0002U
#define BDF_SIZE_ 0x0004U
#define BDF_FONT_BBX_ 0x0008U
#define BDF_PROPS_ 0x0010U
#define BDF_GLYPHS_ 0x0020U
#define BDF_GLYPH_ 0x0040U
#define BDF_ENCODING_ 0x0080U
#define BDF_SWIDTH_ 0x0100U
#define BDF_DWIDTH_ 0x0200U
#define BDF_BBX_ 0x0400U
#define BDF_BITMAP_ 0x0800U
#define BDF_SWIDTH_ADJ_ 0x1000U
#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
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 = FT_Err_Ok;
if ( FT_QRENEW_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] = '\0';
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 lineno )
{
size_t len;
char name[256];
_bdf_list_t list;
FT_Memory memory;
FT_Error error = FT_Err_Ok;
FT_UNUSED( lineno ); /* only used in debug mode */
if ( font == NULL || font->name == NULL || font->name[0] == 0 )
{
error = FT_THROW( Invalid_Argument );
goto Exit;
}
memory = font->memory;
_bdf_list_init( &list, memory );
font->spacing = opts->font_spacing;
len = ft_strlen( font->name ) + 1;
/* Limit ourselves to 256 characters in the font name. */
if ( len >= 256 )
{
FT_ERROR(( "_bdf_set_default_spacing: " ERRMSG7, lineno ));
error = FT_THROW( Invalid_Argument );
goto Exit;
}
FT_MEM_COPY( name, font->name, len );
error = _bdf_list_split( &list, "-", name, (unsigned long)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. */
if ( *sp )
*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,
const char* name,
char* value,
unsigned long lineno )
{
size_t* propid;
bdf_property_t *prop, *fp;
FT_Memory memory = font->memory;
FT_Error error = FT_Err_Ok;
FT_UNUSED( lineno ); /* only used in debug mode */
/* First, check whether the property already exists in the font. */
if ( ( propid = ft_hash_str_lookup( name,
(FT_Hash)font->internal ) ) != NULL )
{
/* The property already exists in the font, so simply replace */
/* the value of the property with the current value. */
fp = font->props + *propid;
switch ( fp->format )
{
case BDF_ATOM:
/* Delete the current atom if it exists. */
FT_FREE( fp->value.atom );
if ( value && value[0] != 0 )
{
if ( FT_STRDUP( fp->value.atom, value ) )
goto Exit;
}
break;
case BDF_INTEGER:
fp->value.l = _bdf_atol( value );
break;
case BDF_CARDINAL:
fp->value.ul = _bdf_atoul( value );
break;
default:
;
}
goto Exit;
}
/* See whether this property type exists yet or not. */
/* If not, create it. */
propid = ft_hash_str_lookup( name, &(font->proptbl) );
if ( !propid )
{
error = bdf_create_property( name, BDF_ATOM, font );
if ( error )
goto Exit;
propid = ft_hash_str_lookup( name, &(font->proptbl) );
}
/* Allocate another property if this is overflowing. */
if ( font->props_used == font->props_size )
{
if ( FT_QRENEW_ARRAY( font->props,
font->props_size,
font->props_size + 1 ) )
goto Exit;
font->props_size++;
}
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:
fp->value.atom = NULL;
if ( value && value[0] )
{
if ( FT_STRDUP( fp->value.atom, value ) )
goto Exit;
}
break;
case BDF_INTEGER:
fp->value.l = _bdf_atol( value );
break;
case BDF_CARDINAL:
fp->value.ul = _bdf_atoul( value );
break;
}
/* If the property happens to be a comment, then it doesn't need */
/* to be added to the internal hash table. */
if ( _bdf_strncmp( name, "COMMENT", 7 ) != 0 )
{
/* Add the property to the font property table. */
error = ft_hash_str_insert( fp->name,
font->props_used,
(FT_Hash)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 ( _bdf_strncmp( name, "DEFAULT_CHAR", 12 ) == 0 )
font->default_char = fp->value.ul;
else if ( _bdf_strncmp( name, "FONT_ASCENT", 11 ) == 0 )
font->font_ascent = fp->value.l;
else if ( _bdf_strncmp( name, "FONT_DESCENT", 12 ) == 0 )
font->font_descent = fp->value.l;
else if ( _bdf_strncmp( name, "SPACING", 7 ) == 0 )
{
if ( !fp->value.atom )
{
FT_ERROR(( "_bdf_add_property: " ERRMSG8, lineno, "SPACING" ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
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
};
static FT_Error
_bdf_parse_end( char* line,
unsigned long linelen,
unsigned long lineno,
void* call_data,
void* client_data )
{
/* a no-op; we ignore everything after `ENDFONT' */
FT_UNUSED( line );
FT_UNUSED( linelen );
FT_UNUSED( lineno );
FT_UNUSED( call_data );
FT_UNUSED( client_data );
return FT_Err_Ok;
}
/* 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_line_func_t* next;
_bdf_parse_t* p;
bdf_glyph_t* glyph;
bdf_font_t* font;
FT_Memory memory;
FT_Error error = FT_Err_Ok;
FT_UNUSED( lineno ); /* only used in debug mode */
next = (_bdf_line_func_t *)call_data;
p = (_bdf_parse_t *) client_data;
font = p->font;
memory = font->memory;
/* Check for a comment. */
if ( _bdf_strncmp( line, "COMMENT", 7 ) == 0 )
{
if ( p->opts->keep_comments )
{
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 ( _bdf_strncmp( line, "CHARS", 5 ) != 0 )
{
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG1, lineno, "CHARS" ));
error = FT_THROW( Missing_Chars_Field );
goto Exit;
}
error = _bdf_list_split( &p->list, " +", line, linelen );
if ( error )
goto Exit;
p->cnt = font->glyphs_size = _bdf_atoul( p->list.field[1] );
/* We need at least 20 bytes per glyph. */
if ( p->cnt > p->size / 20 )
{
p->cnt = font->glyphs_size = p->size / 20;
FT_TRACE2(( "_bdf_parse_glyphs: " ACMSG17, p->cnt ));
}
/* Make sure the number of glyphs is non-zero. */
if ( p->cnt == 0 )
font->glyphs_size = 64;
/* Limit ourselves to 1,114,112 glyphs in the font (this is the */
/* number of code points available in Unicode). */
if ( p->cnt >= 0x110000UL )
{
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG5, lineno, "CHARS" ));
error = FT_THROW( Invalid_Argument );
goto Exit;
}
if ( FT_NEW_ARRAY( font->glyphs, font->glyphs_size ) )
goto Exit;
p->flags |= BDF_GLYPHS_;
goto Exit;
}
/* Check for the ENDFONT field. */
if ( _bdf_strncmp( line, "ENDFONT", 7 ) == 0 )
{
if ( p->flags & BDF_GLYPH_BITS_ )
{
/* Missing ENDCHAR field. */
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG1, lineno, "ENDCHAR" ));
error = FT_THROW( Corrupted_Font_Glyphs );
goto Exit;
}
/* Sort the glyphs by encoding. */
ft_qsort( (char *)font->glyphs,
font->glyphs_used,
sizeof ( bdf_glyph_t ),
by_encoding );
p->flags &= ~BDF_START_;
*next = _bdf_parse_end;
goto Exit;
}
/* Check for the ENDCHAR field. */
if ( _bdf_strncmp( line, "ENDCHAR", 7 ) == 0 )
{
p->glyph_enc = 0;
p->flags &= ~BDF_GLYPH_BITS_;
goto Exit;
}
/* Check 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 ( _bdf_strncmp( line, "STARTCHAR", 9 ) == 0 )
{
if ( p->flags & BDF_GLYPH_BITS_ )
{
/* Missing ENDCHAR field. */
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG1, lineno, "ENDCHAR" ));
error = FT_THROW( Missing_Startchar_Field );
goto Exit;
}
/* 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, " +", line, linelen );
if ( error )
goto Exit;
_bdf_list_shift( &p->list, 1 );
s = _bdf_list_join( &p->list, ' ', &slen );
if ( !s )
{
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG8, lineno, "STARTCHAR" ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
if ( FT_QALLOC( p->glyph_name, slen + 1 ) )
goto Exit;
FT_MEM_COPY( p->glyph_name, s, slen + 1 );
p->flags |= BDF_GLYPH_;
FT_TRACE4(( DBGMSG1, lineno, s ));
goto Exit;
}
/* Check for the ENCODING field. */
if ( _bdf_strncmp( line, "ENCODING", 8 ) == 0 )
{
if ( !( p->flags & BDF_GLYPH_ ) )
{
/* Missing STARTCHAR field. */
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG1, lineno, "STARTCHAR" ));
error = FT_THROW( Missing_Startchar_Field );
goto Exit;
}
error = _bdf_list_split( &p->list, " +", line, linelen );
if ( error )
goto Exit;
p->glyph_enc = _bdf_atol( p->list.field[1] );
/* Normalize negative encoding values. The specification only */
/* allows -1, but we can be more generous here. */
if ( p->glyph_enc < -1 )
p->glyph_enc = -1;
/* Check for alternative encoding format. */
if ( p->glyph_enc == -1 && p->list.used > 2 )
p->glyph_enc = _bdf_atol( p->list.field[2] );
if ( p->glyph_enc < -1 || p->glyph_enc >= 0x110000L )
p->glyph_enc = -1;
FT_TRACE4(( DBGMSG2, 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 = (unsigned long)p->glyph_enc;
/* Reset the initial glyph info. */
p->glyph_name = NULL;
}
else
{
/* Unencoded glyph. Check whether it should */
/* be added or not. */
if ( p->opts->keep_unencoded )
{
/* 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++;
/* Reset the initial glyph info. */
p->glyph_name = NULL;
}
else
{
/* Free up the glyph name if the unencoded shouldn't be */
/* kept. */
FT_FREE( p->glyph_name );
}
p->glyph_name = NULL;
}
/* 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;
}
if ( !( p->flags & BDF_ENCODING_ ) )
goto Missing_Encoding;
/* 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 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_;
}
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];
if ( !sbitset( hdigits, c ) )
break;
*bp = (FT_Byte)( ( *bp << 4 ) + a2i[c] );
if ( i + 1 < nibbles && ( i & 1 ) )
*++bp = 0;
}
/* If any line has not enough columns, */
/* indicate they have been padded with zero bits. */
if ( i < nibbles &&
!( p->flags & BDF_GLYPH_WIDTH_CHECK_ ) )
{
FT_TRACE2(( "_bdf_parse_glyphs: " ACMSG16, glyph->encoding ));
p->flags |= BDF_GLYPH_WIDTH_CHECK_;
}
/* 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 ( i == nibbles &&
sbitset( hdigits, line[nibbles] ) &&
!( p->flags & BDF_GLYPH_WIDTH_CHECK_ ) )
{
FT_TRACE2(( "_bdf_parse_glyphs: " ACMSG14, glyph->encoding ));
p->flags |= BDF_GLYPH_WIDTH_CHECK_;
}
p->row++;
goto Exit;
}
/* Expect the SWIDTH (scalable width) field next. */
if ( _bdf_strncmp( line, "SWIDTH", 6 ) == 0 )
{
error = _bdf_list_split( &p->list, " +", line, linelen );
if ( error )
goto Exit;
glyph->swidth = _bdf_atous( p->list.field[1] );
p->flags |= BDF_SWIDTH_;
goto Exit;
}
/* Expect the DWIDTH (device width) field next. */
if ( _bdf_strncmp( line, "DWIDTH", 6 ) == 0 )
{
error = _bdf_list_split( &p->list, " +", line, linelen );
if ( error )
goto Exit;
glyph->dwidth = _bdf_atous( p->list.field[1] );
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 ( _bdf_strncmp( line, "BBX", 3 ) == 0 )
{
error = _bdf_list_split( &p->list, " +", line, linelen );
if ( error )
goto Exit;
glyph->bbx.width = _bdf_atous( p->list.field[1] );
glyph->bbx.height = _bdf_atous( p->list.field[2] );
glyph->bbx.x_offset = _bdf_atos( p->list.field[3] );
glyph->bbx.y_offset = _bdf_atos( p->list.field[4] );
/* 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 )
{
/* 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;
p->flags |= BDF_SWIDTH_ADJ_;
}
}
p->flags |= BDF_BBX_;
goto Exit;
}
/* And finally, gather up the bitmap. */
if ( _bdf_strncmp( 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 = FT_THROW( 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 ( glyph->bpr > 0xFFFFU || bitmap_size > 0xFFFFU )
{
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG4, lineno ));
error = FT_THROW( Bbx_Too_Big );
goto Exit;
}
else
glyph->bytes = (unsigned short)bitmap_size;
if ( FT_ALLOC( glyph->bitmap, glyph->bytes ) )
goto Exit;
p->row = 0;
p->flags |= BDF_BITMAP_;
goto Exit;
}
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG9, lineno ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
Missing_Encoding:
/* Missing ENCODING field. */
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG1, lineno, "ENCODING" ));
error = FT_THROW( Missing_Encoding_Field );
Exit:
if ( error && ( p->flags & BDF_GLYPH_ ) )
FT_FREE( p->glyph_name );
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 = FT_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 ( _bdf_strncmp( 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, "FONT_ASCENT",
nbuf, lineno );
if ( error )
goto Exit;
FT_TRACE2(( "_bdf_parse_properties: " ACMSG1, p->font->bbx.ascent ));
}
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, "FONT_DESCENT",
nbuf, lineno );
if ( error )
goto Exit;
FT_TRACE2(( "_bdf_parse_properties: " ACMSG2, p->font->bbx.descent ));
}
p->flags &= ~BDF_PROPS_;
*next = _bdf_parse_glyphs;
goto Exit;
}
/* Ignore the _XFREE86_GLYPH_RANGES properties. */
if ( _bdf_strncmp( line, "_XFREE86_GLYPH_RANGES", 21 ) == 0 )
goto Exit;
/* Handle COMMENT fields and properties in a special way to preserve */
/* the spacing. */
if ( _bdf_strncmp( line, "COMMENT", 7 ) == 0 )
{
name = value = line;
value += 7;
if ( *value )
*value++ = 0;
error = _bdf_add_property( p->font, name, value, lineno );
if ( error )
goto Exit;
}
else if ( _bdf_is_atom( line, linelen, &name, &value, p->font ) )
{
error = _bdf_add_property( p->font, name, value, lineno );
if ( error )
goto Exit;
}
else
{
error = _bdf_list_split( &p->list, " +", 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, lineno );
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 = FT_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 ( _bdf_strncmp( line, "COMMENT", 7 ) == 0 )
{
if ( p->opts->keep_comments && p->font )
{
linelen -= 7;
s = line + 7;
if ( *s != 0 )
{
s++;
linelen--;
}
error = _bdf_add_comment( p->font, s, linelen );
}
goto Exit;
}
if ( !( p->flags & BDF_START_ ) )
{
memory = p->memory;
if ( _bdf_strncmp( line, "STARTFONT", 9 ) != 0 )
{
/* we don't emit an error message since this code gets */
/* explicitly caught one level higher */
error = FT_THROW( Missing_Startfont_Field );
goto Exit;
}
p->flags = BDF_START_;
font = p->font = NULL;
if ( FT_NEW( font ) )
goto Exit;
p->font = font;
font->memory = p->memory;
{ /* setup */
size_t i;
bdf_property_t* prop;
error = ft_hash_str_init( &(font->proptbl), memory );
if ( error )
goto Exit;
for ( i = 0, prop = (bdf_property_t*)_bdf_properties;
i < _num_bdf_properties; i++, prop++ )
{
error = ft_hash_str_insert( prop->name, i,
&(font->proptbl), memory );
if ( error )
goto Exit;
}
}
if ( FT_ALLOC( p->font->internal, sizeof ( FT_HashRec ) ) )
goto Exit;
error = ft_hash_str_init( (FT_Hash)p->font->internal, memory );
if ( error )
goto Exit;
p->font->spacing = p->opts->font_spacing;
p->font->default_char = ~0UL;
goto Exit;
}
/* Check for the start of the properties. */
if ( _bdf_strncmp( line, "STARTPROPERTIES", 15 ) == 0 )
{
if ( !( p->flags & BDF_FONT_BBX_ ) )
{
/* Missing the FONTBOUNDINGBOX field. */
FT_ERROR(( "_bdf_parse_start: " ERRMSG1, lineno, "FONTBOUNDINGBOX" ));
error = FT_THROW( Missing_Fontboundingbox_Field );
goto Exit;
}
error = _bdf_list_split( &p->list, " +", line, linelen );
if ( error )
goto Exit;
/* at this point, `p->font' can't be NULL */
p->cnt = p->font->props_size = _bdf_atoul( p->list.field[1] );
/* We need at least 4 bytes per property. */
if ( p->cnt > p->size / 4 )
{
p->font->props_size = 0;
FT_ERROR(( "_bdf_parse_glyphs: " ERRMSG5, lineno, "STARTPROPERTIES" ));
error = FT_THROW( Invalid_Argument );
goto Exit;
}
if ( FT_NEW_ARRAY( p->font->props, p->cnt ) )
{
p->font->props_size = 0;
goto Exit;
}
p->flags |= BDF_PROPS_;
*next = _bdf_parse_properties;
goto Exit;
}
/* Check for the FONTBOUNDINGBOX field. */
if ( _bdf_strncmp( line, "FONTBOUNDINGBOX", 15 ) == 0 )
{
if ( !( p->flags & BDF_SIZE_ ) )
{
/* Missing the SIZE field. */
FT_ERROR(( "_bdf_parse_start: " ERRMSG1, lineno, "SIZE" ));
error = FT_THROW( Missing_Size_Field );
goto Exit;
}
error = _bdf_list_split( &p->list, " +", line, linelen );
if ( error )
goto Exit;
p->font->bbx.width = _bdf_atous( p->list.field[1] );
p->font->bbx.height = _bdf_atous( p->list.field[2] );
p->font->bbx.x_offset = _bdf_atos( p->list.field[3] );
p->font->bbx.y_offset = _bdf_atos( p->list.field[4] );
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 ( _bdf_strncmp( line, "FONT", 4 ) == 0 )
{
error = _bdf_list_split( &p->list, " +", line, linelen );
if ( error )
goto Exit;
_bdf_list_shift( &p->list, 1 );
s = _bdf_list_join( &p->list, ' ', &slen );
if ( !s )
{
FT_ERROR(( "_bdf_parse_start: " ERRMSG8, lineno, "FONT" ));
error = FT_THROW( Invalid_File_Format );
goto Exit;
}
/* Allowing multiple `FONT' lines (which is invalid) doesn't hurt... */
FT_FREE( p->font->name );
if ( FT_QALLOC( 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, lineno );
if ( error )
goto Exit;
p->flags |= BDF_FONT_NAME_;
goto Exit;
}
/* Check for the SIZE field. */
if ( _bdf_strncmp( line, "SIZE", 4 ) == 0 )
{
if ( !( p->flags & BDF_FONT_NAME_ ) )
{
/* Missing the FONT field. */
FT_ERROR(( "_bdf_parse_start: " ERRMSG1, lineno, "FONT" ));
error = FT_THROW( Missing_Font_Field );
goto Exit;
}
error = _bdf_list_split( &p->list, " +", line, linelen );
if ( error )
goto Exit;
p->font->point_size = _bdf_atoul( p->list.field[1] );
p->font->resolution_x = _bdf_atoul( p->list.field[2] );
p->font->resolution_y = _bdf_atoul( p->list.field[3] );
/* Check for the bits per pixel field. */
if ( p->list.used == 5 )
{
unsigned short bpp;
bpp = _bdf_atous( p->list.field[4] );
/* Only values 1, 2, 4, 8 are allowed for greymap fonts. */
if ( bpp > 4 )
p->font->bpp = 8;
else if ( bpp > 2 )
p->font->bpp = 4;
else if ( bpp > 1 )
p->font->bpp = 2;
else
p->font->bpp = 1;
if ( p->font->bpp != bpp )
FT_TRACE2(( "_bdf_parse_start: " ACMSG11, p->font->bpp ));
}
else
p->font->bpp = 1;
p->flags |= BDF_SIZE_;
goto Exit;
}
/* Check for the CHARS field -- font properties are optional */
if ( _bdf_strncmp( line, "CHARS", 5 ) == 0 )
{
char nbuf[128];
if ( !( p->flags & BDF_FONT_BBX_ ) )
{
/* Missing the FONTBOUNDINGBOX field. */
FT_ERROR(( "_bdf_parse_start: " ERRMSG1, lineno, "FONTBOUNDINGBOX" ));
error = FT_THROW( Missing_Fontboundingbox_Field );
goto Exit;
}
/* Add the two standard X11 properties which are required */
/* for compiling fonts. */
p->font->font_ascent = p->font->bbx.ascent;
ft_sprintf( nbuf, "%hd", p->font->bbx.ascent );
error = _bdf_add_property( p->font, "FONT_ASCENT",
nbuf, lineno );
if ( error )
goto Exit;
FT_TRACE2(( "_bdf_parse_properties: " ACMSG1, p->font->bbx.ascent ));
p->font->font_descent = p->font->bbx.descent;
ft_sprintf( nbuf, "%hd", p->font->bbx.descent );
error = _bdf_add_property( p->font, "FONT_DESCENT",
nbuf, lineno );
if ( error )
goto Exit;
FT_TRACE2(( "_bdf_parse_properties: " ACMSG2, p->font->bbx.descent ));
*next = _bdf_parse_glyphs;
/* A special return value. */
error = -1;
goto Exit;
}
FT_ERROR(( "_bdf_parse_start: " ERRMSG9, lineno ));
error = FT_THROW( Invalid_File_Format );
Exit:
return error;
}
/**************************************************************************
*
* API.
*
*/
FT_LOCAL_DEF( FT_Error )
bdf_load_font( FT_Stream stream,
FT_Memory memory,
bdf_options_t* opts,
bdf_font_t* *font )
{
unsigned long lineno = 0; /* make compiler happy */
_bdf_parse_t *p = NULL;
FT_Error error = FT_Err_Ok;
if ( FT_NEW( p ) )
goto Exit;
p->opts = (bdf_options_t*)( opts ? opts : &_bdf_opts );
p->minlb = 32767;
p->size = stream->size;
p->memory = memory; /* only during font creation */
_bdf_list_init( &p->list, memory );
error = _bdf_readstream( stream, _bdf_parse_start,
(void *)p, &lineno );
if ( error )
goto Fail;
if ( p->font )
{
/* If the font is not proportional, set the font's monowidth */
/* field to the width of the font bounding box. */
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 ));
}
/* 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 );
}
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;
}
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;
}
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 );
}
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 ));
error = FT_THROW( Corrupted_Font_Header );
goto Fail;
}
else
{
/* Error happened when parsing glyphs. */
FT_ERROR(( "bdf_load_font: " ERRMSG3, lineno ));
error = FT_THROW( Corrupted_Font_Glyphs );
goto Fail;
}
}
if ( !p->font && !error )
error = FT_THROW( Invalid_File_Format );
*font = p->font;
Exit:
if ( p )
{
_bdf_list_done( &p->list );
FT_FREE( p->glyph_name );
FT_FREE( p );
}
return error;
Fail:
bdf_free_font( p->font );
FT_FREE( p->font );
goto Exit;
}
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 == NULL )
return;
memory = font->memory;
FT_FREE( font->name );
/* Free up the internal hash table of property names. */
if ( font->internal )
{
ft_hash_str_free( (FT_Hash)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 );
/* bdf_cleanup */
ft_hash_str_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 );
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 )
{
size_t* propid;
if ( font == NULL || font->props_size == 0 || name == NULL || *name == 0 )
return 0;
propid = ft_hash_str_lookup( name, (FT_Hash)font->internal );
return propid ? ( font->props + *propid ) : 0;
}
/* END */