Edit
kc3-lang/freetype/src/bdf/bdflib.c
Alexei Podtelezhnikov
- 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 #define BUFSIZE 128 /************************************************************************** * * 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 NULL; 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; if ( FT_STRDUP( p->name, name ) ) goto Exit; 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; } static bdf_property_t* bdf_get_property( const char* name, bdf_font_t* font ) { size_t* propid; if ( name == NULL || *name == 0 ) return NULL; if ( ( propid = ft_hash_str_lookup( name, &(font->proptbl) ) ) == NULL ) return NULL; 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, const 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; sp = ep = line; while ( *ep && *ep != ' ' && *ep != '\t' ) ep++; hold = *ep; *ep = '\0'; p = bdf_get_property( sp, font ); /* If the property exists and is not an atom, just return here. */ if ( p && p->format != BDF_ATOM ) { *ep = (char)hold; /* Undo NUL-termination. */ return 0; } *name = sp; /* 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 < ep ) do sp++; while ( *sp == ' ' || *sp == '\t' ); /* Trim the leading double quote if it exists. */ if ( *sp == '"' ) sp++; *value = sp; /* Trim the trailing whitespace if it exists. */ if ( sp < ep ) do *ep-- = '\0'; while ( *ep == ' ' || *ep == '\t' ); /* Trim the trailing double quote if it exists. */ if ( *ep == '"' ) *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_DUP( p->glyph_name, s, slen + 1 ) ) goto Exit; 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 ); } } /* 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[BUFSIZE]; 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_snprintf( nbuf, BUFSIZE, "%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_snprintf( nbuf, BUFSIZE, "%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_QALLOC( 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_DUP( p->font->name, s, slen + 1 ) ) goto Exit; /* 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[BUFSIZE]; 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_snprintf( nbuf, BUFSIZE, "%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_snprintf( nbuf, BUFSIZE, "%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 */