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path: root/src/bitmap/pcfread.c
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/* $Xorg: pcfread.c,v 1.5 2001/02/09 02:04:02 xorgcvs Exp $ */
/*

Copyright 1990, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

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 OPEN GROUP 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.

Except as contained in this notice, the name of The Open Group shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization
from The Open Group.

*/
/* $XFree86: xc/lib/font/bitmap/pcfread.c,v 1.21 2003/11/17 22:20:22 dawes Exp $ */

/*
 * Author:  Keith Packard, MIT X Consortium
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <X11/fonts/fntfilst.h>
#include <X11/fonts/bitmap.h>
#include <X11/fonts/pcf.h>

#ifndef MAX
#define   MAX(a,b)    (((a)>(b)) ? a : b)
#endif

#include <stdarg.h>
#include <stdint.h>

void
pcfError(const char* message, ...)
{
    va_list args;

    va_start(args, message);

    fprintf(stderr, "PCF Error: ");
    vfprintf(stderr, message, args);
    va_end(args);
}
                              
/* Read PCF font files */

static void pcfUnloadFont ( FontPtr pFont );
static int  position;


#define IS_EOF(file) ((file)->eof == BUFFILEEOF)

#define FONT_FILE_GETC_ERR(f)  (tmp = FontFileGetc(f), BAIL_ON_EOF)

static int
pcfGetLSB32(FontFilePtr file)
{
    int         c;

    c = FontFileGetc(file);
    c |= FontFileGetc(file) << 8;
    c |= FontFileGetc(file) << 16;
    c |= FontFileGetc(file) << 24;
    position += 4;
    return c;
}

static int
pcfGetINT32(FontFilePtr file, CARD32 format)
{
    int         c;

    if (PCF_BYTE_ORDER(format) == MSBFirst) {
	c = FontFileGetc(file) << 24;
	c |= FontFileGetc(file) << 16;
	c |= FontFileGetc(file) << 8;
	c |= FontFileGetc(file);
    } else {
	c = FontFileGetc(file);
	c |= FontFileGetc(file) << 8;
	c |= FontFileGetc(file) << 16;
	c |= FontFileGetc(file) << 24;
    }
    position += 4;
    return c;
}

static int
pcfGetINT16(FontFilePtr file, CARD32 format)
{
    int         c;

    if (PCF_BYTE_ORDER(format) == MSBFirst) {
	c = FontFileGetc(file) << 8;
	c |= FontFileGetc(file);
    } else {
	c = FontFileGetc(file);
	c |= FontFileGetc(file) << 8;
    }
    position += 2;
    return c;
}

#define pcfGetINT8(file, format) (position++, FontFileGetc(file))

static      PCFTablePtr
pcfReadTOC(FontFilePtr file, int *countp)
{
    CARD32      version;
    PCFTablePtr tables;
    int         count;
    int         i;

    position = 0;
    version = pcfGetLSB32(file);
    if (version != PCF_FILE_VERSION)
	return (PCFTablePtr) NULL;
    count = pcfGetLSB32(file);
    if (IS_EOF(file)) return (PCFTablePtr) NULL;
    if (count < 0 || count > INT32_MAX / sizeof(PCFTableRec)) {
	pcfError("pcfReadTOC(): invalid file format\n");
	return NULL;
    }
    tables = (PCFTablePtr) xalloc(count * sizeof(PCFTableRec));
    if (!tables) {
      pcfError("pcfReadTOC(): Couldn't allocate tables (%d*%d)\n", count, sizeof(PCFTableRec));
	return (PCFTablePtr) NULL;
    }
    for (i = 0; i < count; i++) {
	tables[i].type = pcfGetLSB32(file);
	tables[i].format = pcfGetLSB32(file);
	tables[i].size = pcfGetLSB32(file);
	tables[i].offset = pcfGetLSB32(file);
	if (IS_EOF(file)) goto Bail;
    }

    *countp = count;
    return tables;

 Bail:
    xfree(tables);
    return (PCFTablePtr) NULL;
}

/*
 * PCF supports two formats for metrics, both the regular
 * jumbo size, and 'lite' metrics, which are useful
 * for most fonts which have even vaguely reasonable
 * metrics
 */

static Bool
pcfGetMetric(FontFilePtr file, CARD32 format, xCharInfo *metric)
{
    metric->leftSideBearing = pcfGetINT16(file, format);
    metric->rightSideBearing = pcfGetINT16(file, format);
    metric->characterWidth = pcfGetINT16(file, format);
    metric->ascent = pcfGetINT16(file, format);
    metric->descent = pcfGetINT16(file, format);
    metric->attributes = pcfGetINT16(file, format);
    if (IS_EOF(file)) return FALSE;

    return TRUE;
}

static Bool
pcfGetCompressedMetric(FontFilePtr file, CARD32 format, xCharInfo *metric)
{
    metric->leftSideBearing = pcfGetINT8(file, format) - 0x80;
    metric->rightSideBearing = pcfGetINT8(file, format) - 0x80;
    metric->characterWidth = pcfGetINT8(file, format) - 0x80;
    metric->ascent = pcfGetINT8(file, format) - 0x80;
    metric->descent = pcfGetINT8(file, format) - 0x80;
    metric->attributes = 0;
    if (IS_EOF(file)) return FALSE;

    return TRUE;
}

/*
 * Position the file to the begining of the specified table
 * in the font file
 */
static Bool
pcfSeekToType(FontFilePtr file, PCFTablePtr tables, int ntables, 
	      CARD32 type, CARD32 *formatp, CARD32 *sizep)
{
    int         i;

    for (i = 0; i < ntables; i++)
	if (tables[i].type == type) {
	    if (position > tables[i].offset)
		return FALSE;
	    if (!FontFileSkip(file, tables[i].offset - position))
		return FALSE;
	    position = tables[i].offset;
	    *sizep = tables[i].size;
	    *formatp = tables[i].format;
	    return TRUE;
	}
    return FALSE;
}

static Bool
pcfHasType (PCFTablePtr tables, int ntables, CARD32 type)
{
    int         i;

    for (i = 0; i < ntables; i++)
	if (tables[i].type == type)
	    return TRUE;
    return FALSE;
}

/*
 * pcfGetProperties 
 *
 * Reads the font properties from the font file, filling in the FontInfo rec
 * supplied.  Used by by both ReadFont and ReadFontInfo routines.
 */

static Bool
pcfGetProperties(FontInfoPtr pFontInfo, FontFilePtr file, 
		 PCFTablePtr tables, int ntables)
{
    FontPropPtr props = 0;
    int         nprops;
    char       *isStringProp = 0;
    CARD32      format;
    int         i;
    CARD32      size;
    int         string_size;
    char       *strings;

    /* font properties */

    if (!pcfSeekToType(file, tables, ntables, PCF_PROPERTIES, &format, &size))
	goto Bail;
    format = pcfGetLSB32(file);
    if (!PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT))
	goto Bail;
    nprops = pcfGetINT32(file, format);
    if (nprops <= 0 || nprops > INT32_MAX / sizeof(FontPropRec)) {
	pcfError("pcfGetProperties(): invalid nprops value (%d)\n", nprops);
	goto Bail;
    }
    if (IS_EOF(file)) goto Bail;
    props = (FontPropPtr) xalloc(nprops * sizeof(FontPropRec));
    if (!props) {
      pcfError("pcfGetProperties(): Couldn't allocate props (%d*%d)\n", nprops, sizeof(FontPropRec));
	goto Bail;
    }
    isStringProp = (char *) xalloc(nprops * sizeof(char));
    if (!isStringProp) {
      pcfError("pcfGetProperties(): Couldn't allocate isStringProp (%d*%d)\n", nprops, sizeof(char));
	goto Bail;
    }
    for (i = 0; i < nprops; i++) {
	props[i].name = pcfGetINT32(file, format);
	isStringProp[i] = pcfGetINT8(file, format);
	props[i].value = pcfGetINT32(file, format);
	if (props[i].name < 0 
	    || (isStringProp[i] != 0 && isStringProp[i] != 1)
	    || (isStringProp[i] && props[i].value < 0)) {
	    pcfError("pcfGetProperties(): invalid file format %d %d %d\n",
		     props[i].name, isStringProp[i], props[i].value);
	    goto Bail;
	}
	if (IS_EOF(file)) goto Bail;
    }
    /* pad the property array */
    /*
     * clever here - nprops is the same as the number of odd-units read, as
     * only isStringProp are odd length
     */
    if (nprops & 3)
    {
	i = 4 - (nprops & 3);
	(void)FontFileSkip(file, i);
	position += i;
    }
    if (IS_EOF(file)) goto Bail;
    string_size = pcfGetINT32(file, format);
    if (string_size < 0) goto Bail;
    if (IS_EOF(file)) goto Bail;
    strings = (char *) xalloc(string_size);
    if (!strings) {
      pcfError("pcfGetProperties(): Couldn't allocate strings (%d)\n", string_size);
	goto Bail;
    }
    FontFileRead(file, strings, string_size);
    if (IS_EOF(file)) goto Bail;
    position += string_size;
    for (i = 0; i < nprops; i++) {
	props[i].name = MakeAtom(strings + props[i].name,
				 strlen(strings + props[i].name), TRUE);
	if (isStringProp[i]) {
	    props[i].value = MakeAtom(strings + props[i].value,
				      strlen(strings + props[i].value), TRUE);
	}
    }
    xfree(strings);
    pFontInfo->isStringProp = isStringProp;
    pFontInfo->props = props;
    pFontInfo->nprops = nprops;
    return TRUE;
Bail:
    xfree(isStringProp);
    xfree(props);
    return FALSE;
}


/*
 * pcfReadAccel
 *
 * Fill in the accelerator information from the font file; used
 * to read both BDF_ACCELERATORS and old style ACCELERATORS
 */

static Bool
pcfGetAccel(FontInfoPtr pFontInfo, FontFilePtr file, 
	    PCFTablePtr tables, int ntables, CARD32 type)
{
    CARD32      format;
    CARD32	size;

    if (!pcfSeekToType(file, tables, ntables, type, &format, &size) ||
	IS_EOF(file))
	goto Bail;
    format = pcfGetLSB32(file);
    if (!PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT) &&
	!PCF_FORMAT_MATCH(format, PCF_ACCEL_W_INKBOUNDS)) 
    {
	goto Bail;
    }
    pFontInfo->noOverlap = pcfGetINT8(file, format);
    pFontInfo->constantMetrics = pcfGetINT8(file, format);
    pFontInfo->terminalFont = pcfGetINT8(file, format);
    pFontInfo->constantWidth = pcfGetINT8(file, format);
    pFontInfo->inkInside = pcfGetINT8(file, format);
    pFontInfo->inkMetrics = pcfGetINT8(file, format);
    pFontInfo->drawDirection = pcfGetINT8(file, format);
    pFontInfo->anamorphic = FALSE;
    pFontInfo->cachable = TRUE;
     /* natural alignment */ pcfGetINT8(file, format);
    pFontInfo->fontAscent = pcfGetINT32(file, format);
    pFontInfo->fontDescent = pcfGetINT32(file, format);
    pFontInfo->maxOverlap = pcfGetINT32(file, format);
    if (IS_EOF(file)) goto Bail;
    if (!pcfGetMetric(file, format, &pFontInfo->minbounds))
	goto Bail;
    if (!pcfGetMetric(file, format, &pFontInfo->maxbounds))
	goto Bail;
    if (PCF_FORMAT_MATCH(format, PCF_ACCEL_W_INKBOUNDS)) {
	if (!pcfGetMetric(file, format, &pFontInfo->ink_minbounds))
	    goto Bail;
	if (!pcfGetMetric(file, format, &pFontInfo->ink_maxbounds))
	    goto Bail;
    } else {
	pFontInfo->ink_minbounds = pFontInfo->minbounds;
	pFontInfo->ink_maxbounds = pFontInfo->maxbounds;
    }
    return TRUE;
Bail:
    return FALSE;
}

int
pcfReadFont(FontPtr pFont, FontFilePtr file, 
	    int bit, int byte, int glyph, int scan)
{
    CARD32      format;
    CARD32      size;
    BitmapFontPtr  bitmapFont = 0;
    int         i;
    PCFTablePtr tables = 0;
    int         ntables;
    int         nmetrics;
    int         nbitmaps;
    int         sizebitmaps;
    int         nink_metrics;
    CharInfoPtr metrics = 0;
    xCharInfo  *ink_metrics = 0;
    char       *bitmaps = 0;
    CharInfoPtr **encoding = 0;
    int         nencoding = 0;
    int         encodingOffset;
    CARD32      bitmapSizes[GLYPHPADOPTIONS];
    CARD32     *offsets = 0;
    Bool	hasBDFAccelerators;

    pFont->info.nprops = 0;
    pFont->info.props = 0;
    if (!(tables = pcfReadTOC(file, &ntables)))
	goto Bail;

    /* properties */

    if (!pcfGetProperties(&pFont->info, file, tables, ntables))
	goto Bail;

    /* Use the old accelerators if no BDF accelerators are in the file */

    hasBDFAccelerators = pcfHasType (tables, ntables, PCF_BDF_ACCELERATORS);
    if (!hasBDFAccelerators)
	if (!pcfGetAccel (&pFont->info, file, tables, ntables, PCF_ACCELERATORS))
	    goto Bail;

    /* metrics */

    if (!pcfSeekToType(file, tables, ntables, PCF_METRICS, &format, &size)) {
	goto Bail;
    }
    format = pcfGetLSB32(file);
    if (!PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT) &&
	    !PCF_FORMAT_MATCH(format, PCF_COMPRESSED_METRICS)) {
	goto Bail;
    }
    if (PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT))
	nmetrics = pcfGetINT32(file, format);
    else
	nmetrics = pcfGetINT16(file, format);
    if (IS_EOF(file)) goto Bail;
    if (nmetrics < 0 || nmetrics > INT32_MAX / sizeof(CharInfoRec)) {
	pcfError("pcfReadFont(): invalid file format\n");
	goto Bail;
    }
    metrics = (CharInfoPtr) xalloc(nmetrics * sizeof(CharInfoRec));
    if (!metrics) {
      pcfError("pcfReadFont(): Couldn't allocate metrics (%d*%d)\n", nmetrics, sizeof(CharInfoRec));
	goto Bail;
    }
    for (i = 0; i < nmetrics; i++)
	if (PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT)) {
	    if (!pcfGetMetric(file, format, &(metrics + i)->metrics))
		goto Bail;
	} else {
	    if (!pcfGetCompressedMetric(file, format, &(metrics + i)->metrics))
		goto Bail;
	}
    
    /* bitmaps */

    if (!pcfSeekToType(file, tables, ntables, PCF_BITMAPS, &format, &size))
	goto Bail;
    format = pcfGetLSB32(file);
    if (!PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT))
	goto Bail;

    nbitmaps = pcfGetINT32(file, format);
    if (nbitmaps != nmetrics || IS_EOF(file))
	goto Bail;
    /* nmetrics is already ok, so nbitmap also is */
    offsets = (CARD32 *) xalloc(nbitmaps * sizeof(CARD32));
    if (!offsets) {
      pcfError("pcfReadFont(): Couldn't allocate offsets (%d*%d)\n", nbitmaps, sizeof(CARD32));
	goto Bail;
    }
    for (i = 0; i < nbitmaps; i++) {
	offsets[i] = pcfGetINT32(file, format);
	if (IS_EOF(file)) goto Bail;
    }

    for (i = 0; i < GLYPHPADOPTIONS; i++) {
	bitmapSizes[i] = pcfGetINT32(file, format);
	if (IS_EOF(file)) goto Bail;
	if (bitmapSizes[i] < 0) goto Bail;
    }
    
    sizebitmaps = bitmapSizes[PCF_GLYPH_PAD_INDEX(format)];
    /* guard against completely empty font */
    bitmaps = xalloc(sizebitmaps ? sizebitmaps : 1);
    if (!bitmaps) {
      pcfError("pcfReadFont(): Couldn't allocate bitmaps (%d)\n", sizebitmaps ? sizebitmaps : 1);
	goto Bail;
    }
    FontFileRead(file, bitmaps, sizebitmaps);
    if (IS_EOF(file)) goto Bail;
    position += sizebitmaps;

    if (PCF_BIT_ORDER(format) != bit)
	BitOrderInvert((unsigned char *)bitmaps, sizebitmaps);
    if ((PCF_BYTE_ORDER(format) == PCF_BIT_ORDER(format)) != (bit == byte)) {
	switch (bit == byte ? PCF_SCAN_UNIT(format) : scan) {
	case 1:
	    break;
	case 2:
	    TwoByteSwap((unsigned char *)bitmaps, sizebitmaps);
	    break;
	case 4:
	    FourByteSwap((unsigned char *)bitmaps, sizebitmaps);
	    break;
	}
    }
    if (PCF_GLYPH_PAD(format) != glyph) {
	char       *padbitmaps;
	int         sizepadbitmaps;
	int         old,
	            new;
	xCharInfo  *metric;

	sizepadbitmaps = bitmapSizes[PCF_SIZE_TO_INDEX(glyph)];
	padbitmaps = (char *) xalloc(sizepadbitmaps);
	if (!padbitmaps) {
          pcfError("pcfReadFont(): Couldn't allocate padbitmaps (%d)\n", sizepadbitmaps);
	    goto Bail;
	}
	new = 0;
	for (i = 0; i < nbitmaps; i++) {
	    old = offsets[i];
	    metric = &metrics[i].metrics;
	    offsets[i] = new;
	    new += RepadBitmap(bitmaps + old, padbitmaps + new,
			       PCF_GLYPH_PAD(format), glyph,
			  metric->rightSideBearing - metric->leftSideBearing,
			       metric->ascent + metric->descent);
	}
	xfree(bitmaps);
	bitmaps = padbitmaps;
    }
    for (i = 0; i < nbitmaps; i++)
	metrics[i].bits = bitmaps + offsets[i];

    xfree(offsets);
    offsets = NULL;

    /* ink metrics ? */

    ink_metrics = NULL;
    if (pcfSeekToType(file, tables, ntables, PCF_INK_METRICS, &format, &size)) {
	format = pcfGetLSB32(file);
	if (!PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT) &&
		!PCF_FORMAT_MATCH(format, PCF_COMPRESSED_METRICS)) {
	    goto Bail;
	}
	if (PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT))
	    nink_metrics = pcfGetINT32(file, format);
	else
	    nink_metrics = pcfGetINT16(file, format);
	if (IS_EOF(file)) goto Bail;
	if (nink_metrics != nmetrics)
	    goto Bail;
	/* nmetrics already checked */
	ink_metrics = (xCharInfo *) xalloc(nink_metrics * sizeof(xCharInfo));
      if (!ink_metrics) {
          pcfError("pcfReadFont(): Couldn't allocate ink_metrics (%d*%d)\n", nink_metrics, sizeof(xCharInfo));       
	    goto Bail;
      }
	for (i = 0; i < nink_metrics; i++)
	    if (PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT)) {
		if (!pcfGetMetric(file, format, ink_metrics + i))
		    goto Bail;
	    } else {
		if (!pcfGetCompressedMetric(file, format, ink_metrics + i))
		    goto Bail;
	    }
    }

    /* encoding */

    if (!pcfSeekToType(file, tables, ntables, PCF_BDF_ENCODINGS, &format, &size))
	goto Bail;
    format = pcfGetLSB32(file);
    if (!PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT))
	goto Bail;

    pFont->info.firstCol = pcfGetINT16(file, format);
    pFont->info.lastCol = pcfGetINT16(file, format);
    pFont->info.firstRow = pcfGetINT16(file, format);
    pFont->info.lastRow = pcfGetINT16(file, format);
    pFont->info.defaultCh = pcfGetINT16(file, format);
    if (IS_EOF(file)) goto Bail;
    if (pFont->info.firstCol > pFont->info.lastCol ||
       pFont->info.firstRow > pFont->info.lastRow ||
       pFont->info.lastCol-pFont->info.firstCol > 255) goto Bail;

    nencoding = (pFont->info.lastCol - pFont->info.firstCol + 1) *
	(pFont->info.lastRow - pFont->info.firstRow + 1);

    encoding = (CharInfoPtr **) xcalloc(NUM_SEGMENTS(nencoding),
                                       sizeof(CharInfoPtr*));
    if (!encoding) {
      pcfError("pcfReadFont(): Couldn't allocate encoding (%d*%d)\n", nencoding, sizeof(CharInfoPtr));    
	goto Bail;
    }
    
    pFont->info.allExist = TRUE;
    for (i = 0; i < nencoding; i++) {
	encodingOffset = pcfGetINT16(file, format);
	if (IS_EOF(file)) goto Bail;
	if (encodingOffset == 0xFFFF) {
	    pFont->info.allExist = FALSE;
	} else {
            if(!encoding[SEGMENT_MAJOR(i)]) {
                encoding[SEGMENT_MAJOR(i)]=
                    (CharInfoPtr*)xcalloc(BITMAP_FONT_SEGMENT_SIZE,
                                          sizeof(CharInfoPtr));
                if(!encoding[SEGMENT_MAJOR(i)])
                    goto Bail;
            }
	    ACCESSENCODINGL(encoding, i) = metrics + encodingOffset;
        }
    }

    /* BDF style accelerators (i.e. bounds based on encoded glyphs) */

    if (hasBDFAccelerators)
	if (!pcfGetAccel (&pFont->info, file, tables, ntables, PCF_BDF_ACCELERATORS))
	    goto Bail;

    bitmapFont = (BitmapFontPtr) xalloc(sizeof *bitmapFont);
    if (!bitmapFont) {
      pcfError("pcfReadFont(): Couldn't allocate bitmapFont (%d)\n", sizeof *bitmapFont);
	goto Bail;
    }

    bitmapFont->version_num = PCF_FILE_VERSION;
    bitmapFont->num_chars = nmetrics;
    bitmapFont->num_tables = ntables;
    bitmapFont->metrics = metrics;
    bitmapFont->ink_metrics = ink_metrics;
    bitmapFont->bitmaps = bitmaps;
    bitmapFont->encoding = encoding;
    bitmapFont->pDefault = (CharInfoPtr) 0;
    if (pFont->info.defaultCh != (unsigned short) NO_SUCH_CHAR) {
	unsigned int r,
	            c,
	            cols;

	r = pFont->info.defaultCh >> 8;
	c = pFont->info.defaultCh & 0xFF;
	if (pFont->info.firstRow <= r && r <= pFont->info.lastRow &&
		pFont->info.firstCol <= c && c <= pFont->info.lastCol) {
	    cols = pFont->info.lastCol - pFont->info.firstCol + 1;
	    r = r - pFont->info.firstRow;
	    c = c - pFont->info.firstCol;
	    bitmapFont->pDefault = ACCESSENCODING(encoding, r * cols + c);
	}
    }
    bitmapFont->bitmapExtra = (BitmapExtraPtr) 0;
    pFont->fontPrivate = (pointer) bitmapFont;
    pFont->get_glyphs = bitmapGetGlyphs;
    pFont->get_metrics = bitmapGetMetrics;
    pFont->unload_font = pcfUnloadFont;
    pFont->unload_glyphs = NULL;
    pFont->bit = bit;
    pFont->byte = byte;
    pFont->glyph = glyph;
    pFont->scan = scan;
    xfree(tables);
    return Successful;
Bail:
    xfree(ink_metrics);
    if(encoding) {
        for(i=0; i<NUM_SEGMENTS(nencoding); i++)
            xfree(encoding[i]);
    }
    xfree(encoding);
    xfree(bitmaps);
    xfree(metrics);
    xfree(pFont->info.props);
    pFont->info.nprops = 0;
    pFont->info.props = 0;
    xfree (pFont->info.isStringProp);
    xfree(bitmapFont);
    xfree(tables);
    xfree(offsets);
    return AllocError;
}

int
pcfReadFontInfo(FontInfoPtr pFontInfo, FontFilePtr file)
{
    PCFTablePtr tables;
    int         ntables;
    CARD32      format;
    CARD32      size;
    int         nencoding;
    Bool	hasBDFAccelerators;

    pFontInfo->isStringProp = NULL;
    pFontInfo->props = NULL;
    pFontInfo->nprops = 0;

    if (!(tables = pcfReadTOC(file, &ntables)))
	goto Bail;

    /* properties */

    if (!pcfGetProperties(pFontInfo, file, tables, ntables))
	goto Bail;

    /* Use the old accelerators if no BDF accelerators are in the file */

    hasBDFAccelerators = pcfHasType (tables, ntables, PCF_BDF_ACCELERATORS);
    if (!hasBDFAccelerators)
	if (!pcfGetAccel (pFontInfo, file, tables, ntables, PCF_ACCELERATORS))
	    goto Bail;

    /* encoding */

    if (!pcfSeekToType(file, tables, ntables, PCF_BDF_ENCODINGS, &format, &size))
	goto Bail;
    format = pcfGetLSB32(file);
    if (!PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT))
	goto Bail;

    pFontInfo->firstCol = pcfGetINT16(file, format);
    pFontInfo->lastCol = pcfGetINT16(file, format);
    pFontInfo->firstRow = pcfGetINT16(file, format);
    pFontInfo->lastRow = pcfGetINT16(file, format);
    pFontInfo->defaultCh = pcfGetINT16(file, format);
    if (IS_EOF(file)) goto Bail;
    if (pFontInfo->firstCol > pFontInfo->lastCol ||
       pFontInfo->firstRow > pFontInfo->lastRow ||
       pFontInfo->lastCol-pFontInfo->firstCol > 255) goto Bail;

    nencoding = (pFontInfo->lastCol - pFontInfo->firstCol + 1) *
	(pFontInfo->lastRow - pFontInfo->firstRow + 1);

    pFontInfo->allExist = TRUE;
    while (nencoding--) {
	if (pcfGetINT16(file, format) == 0xFFFF)
	    pFontInfo->allExist = FALSE;
	if (IS_EOF(file)) goto Bail;
    }
    if (IS_EOF(file)) goto Bail;

    /* BDF style accelerators (i.e. bounds based on encoded glyphs) */

    if (hasBDFAccelerators)
	if (!pcfGetAccel (pFontInfo, file, tables, ntables, PCF_BDF_ACCELERATORS))
	    goto Bail;

    xfree(tables);
    return Successful;
Bail:
    pFontInfo->nprops = 0;
    xfree (pFontInfo->props);
    xfree (pFontInfo->isStringProp);
    xfree(tables);
    return AllocError;
}

static void
pcfUnloadFont(FontPtr pFont)
{
    BitmapFontPtr  bitmapFont;
    int i,nencoding;

    bitmapFont = (BitmapFontPtr) pFont->fontPrivate;
    xfree(bitmapFont->ink_metrics);
    if(bitmapFont->encoding) {
        nencoding = (pFont->info.lastCol - pFont->info.firstCol + 1) *
	    (pFont->info.lastRow - pFont->info.firstRow + 1);
        for(i=0; i<NUM_SEGMENTS(nencoding); i++)
            xfree(bitmapFont->encoding[i]);
    }
    xfree(bitmapFont->encoding);
    xfree(bitmapFont->bitmaps);
    xfree(bitmapFont->metrics);
    xfree(pFont->info.isStringProp);
    xfree(pFont->info.props);
    xfree(bitmapFont);
    DestroyFontRec(pFont);
}

int
pmfReadFont(FontPtr pFont, FontFilePtr file, 
	    int bit, int byte, int glyph, int scan)
{
    CARD32      format;
    CARD32      size;
    BitmapFontPtr  bitmapFont = 0;
    int         i;
    PCFTablePtr tables = 0;
    int         ntables;
    int         nmetrics;
    int         sizebitmaps;
    int         nink_metrics;
    CharInfoPtr metrics = 0;
    xCharInfo  *ink_metrics = 0;
    char       *bitmaps = 0;
    CharInfoPtr **encoding = 0;
    int         nencoding = 0;
    int         encodingOffset;
    Bool	hasBDFAccelerators;
    CharInfoPtr pci;

    pFont->info.nprops = 0;
    pFont->info.props = 0;

    if (!(tables = pcfReadTOC(file, &ntables)))
	goto Bail;

    /* properties */

    if (!pcfGetProperties(&pFont->info, file, tables, ntables))
	goto Bail;

    /* Use the old accelerators if no BDF accelerators are in the file */

    hasBDFAccelerators = pcfHasType (tables, ntables, PCF_BDF_ACCELERATORS);
    if (!hasBDFAccelerators)
	if (!pcfGetAccel (&pFont->info, file, tables, ntables, PCF_ACCELERATORS))
	    goto Bail;

    /* metrics */

    if (!pcfSeekToType(file, tables, ntables, PCF_METRICS, &format, &size)) {
	goto Bail;
    }
    format = pcfGetLSB32(file);
    if (!PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT) &&
	    !PCF_FORMAT_MATCH(format, PCF_COMPRESSED_METRICS)) {
	goto Bail;
    }
    if (PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT))
	nmetrics = pcfGetINT32(file, format);
    else
	nmetrics = pcfGetINT16(file, format);
    if (IS_EOF(file)) goto Bail;
    if (nmetrics < 0 || nmetrics > INT32_MAX / sizeof(CharInfoRec)) {
	pcfError("pmfReadFont(): invalid file format\n");
	goto Bail;
    }
    metrics = (CharInfoPtr) xalloc(nmetrics * sizeof(CharInfoRec));
    if (!metrics) {
      pcfError("pmfReadFont(): Couldn't allocate metrics (%d*%d)\n", nmetrics, sizeof(CharInfoRec));
	goto Bail;
    }
    for (i = 0; i < nmetrics; i++)
	if (PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT)) {
	    if (!pcfGetMetric(file, format, &(metrics + i)->metrics))
		goto Bail;
	} else {
	    if (!pcfGetCompressedMetric(file, format, &(metrics + i)->metrics))
		goto Bail;
	}
    
    /* Set the bitmaps to all point to the same zero filled array 
     * that is the size of the largest bitmap.
     */

    pci = metrics;
    sizebitmaps = 0;
    for (i = 0; i < nmetrics; i++)
    {
	sizebitmaps = MAX(sizebitmaps,BYTES_FOR_GLYPH(pci, glyph));
	pci++;
    }

    sizebitmaps = BUFSIZ;

    /* guard against completely empty font */
    bitmaps = (char *) xalloc(sizebitmaps);
    if (!bitmaps) {
      pcfError("pmfReadFont(): Couldn't allocate bitmaps (%d)\n", sizebitmaps);
	goto Bail;
    }

    memset(bitmaps,0,sizebitmaps);
    for (i = 0; i < nmetrics; i++)
	metrics[i].bits = bitmaps;

    /* ink metrics ? */

    ink_metrics = NULL;
    if (pcfSeekToType(file, tables, ntables, PCF_INK_METRICS, &format, &size)) {
	format = pcfGetLSB32(file);
	if (!PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT) &&
		!PCF_FORMAT_MATCH(format, PCF_COMPRESSED_METRICS)) {
	    goto Bail;
	}
	if (PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT))
	    nink_metrics = pcfGetINT32(file, format);
	else
	    nink_metrics = pcfGetINT16(file, format);
	if (nink_metrics != nmetrics)
	    goto Bail;
	if (IS_EOF(file)) goto Bail;
	ink_metrics = (xCharInfo *) xalloc(nink_metrics * sizeof(xCharInfo));
      if (!ink_metrics) {
          pcfError("pmfReadFont(): Couldn't allocate ink_metrics (%d*%d)\n", nink_metrics, sizeof(xCharInfo));
	    goto Bail;
      }
	for (i = 0; i < nink_metrics; i++)
	    if (PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT)) {
		if (!pcfGetMetric(file, format, ink_metrics + i))
		    goto Bail;
	    } else {
		if (!pcfGetCompressedMetric(file, format, ink_metrics + i))
		    goto Bail;
	    }
    }

    /* encoding */

    if (!pcfSeekToType(file, tables, ntables, PCF_BDF_ENCODINGS, &format, &size))
	goto Bail;
    format = pcfGetLSB32(file);
    if (!PCF_FORMAT_MATCH(format, PCF_DEFAULT_FORMAT))
	goto Bail;

    pFont->info.firstCol = pcfGetINT16(file, format);
    pFont->info.lastCol = pcfGetINT16(file, format);
    pFont->info.firstRow = pcfGetINT16(file, format);
    pFont->info.lastRow = pcfGetINT16(file, format);
    pFont->info.defaultCh = pcfGetINT16(file, format);
    if (IS_EOF(file)) goto Bail;

    nencoding = (pFont->info.lastCol - pFont->info.firstCol + 1) *
	(pFont->info.lastRow - pFont->info.firstRow + 1);

    encoding = (CharInfoPtr **) xcalloc(NUM_SEGMENTS(nencoding),
                                       sizeof(CharInfoPtr*));
    if (!encoding) {
      pcfError("pmfReadFont(): Couldn't allocate encoding (%d*%d)\n", nencoding, sizeof(CharInfoPtr));
	goto Bail;
    }
    pFont->info.allExist = TRUE;
    for (i = 0; i < nencoding; i++) {
	encodingOffset = pcfGetINT16(file, format);
	if (IS_EOF(file)) goto Bail;
	if (encodingOffset == 0xFFFF) {
	    pFont->info.allExist = FALSE;
	} else {
            if(!encoding[SEGMENT_MAJOR(i)]) {
                encoding[SEGMENT_MAJOR(i)]=
                    (CharInfoPtr*)xcalloc(BITMAP_FONT_SEGMENT_SIZE,
                                          sizeof(CharInfoPtr));
                if(!encoding[SEGMENT_MAJOR(i)])
                    goto Bail;
            }
	    ACCESSENCODINGL(encoding, i) = metrics + encodingOffset;
	}
    }
    if (IS_EOF(file)) goto Bail;

    /* BDF style accelerators (i.e. bounds based on encoded glyphs) */

    if (hasBDFAccelerators)
	if (!pcfGetAccel (&pFont->info, file, tables, ntables, PCF_BDF_ACCELERATORS))
	    goto Bail;

    bitmapFont = (BitmapFontPtr) xalloc(sizeof *bitmapFont);
    if (!bitmapFont) {
      pcfError("pmfReadFont(): Couldn't allocate bitmapFont (%d)\n", sizeof *bitmapFont);
	goto Bail;
    }
    
    bitmapFont->version_num = PCF_FILE_VERSION;
    bitmapFont->num_chars = nmetrics;
    bitmapFont->num_tables = ntables;
    bitmapFont->metrics = metrics;
    bitmapFont->ink_metrics = ink_metrics;
    bitmapFont->bitmaps = bitmaps;
    bitmapFont->encoding = encoding;
    bitmapFont->pDefault = (CharInfoPtr) 0;
    if (pFont->info.defaultCh != (unsigned short) NO_SUCH_CHAR) {
	unsigned int r,
	            c,
	            cols;

	r = pFont->info.defaultCh >> 8;
	c = pFont->info.defaultCh & 0xFF;
	if (pFont->info.firstRow <= r && r <= pFont->info.lastRow &&
		pFont->info.firstCol <= c && c <= pFont->info.lastCol) {
	    cols = pFont->info.lastCol - pFont->info.firstCol + 1;
	    r = r - pFont->info.firstRow;
	    c = c - pFont->info.firstCol;
	    bitmapFont->pDefault = ACCESSENCODING(encoding, r * cols + c);
	}
    }
    bitmapFont->bitmapExtra = (BitmapExtraPtr) 0;
    pFont->fontPrivate = (pointer) bitmapFont;
    pFont->get_glyphs = bitmapGetGlyphs;
    pFont->get_metrics = bitmapGetMetrics;
    pFont->unload_font = pcfUnloadFont;
    pFont->unload_glyphs = NULL;
    pFont->bit = bit;
    pFont->byte = byte;
    pFont->glyph = glyph;
    pFont->scan = scan;
    xfree(tables);
    return Successful;
Bail:
    xfree(ink_metrics);
    if(encoding) {
        for(i=0; i<NUM_SEGMENTS(nencoding); i++)
            xfree(encoding[i]);
    }
    xfree(encoding);
    xfree(bitmaps);
    xfree(metrics);
    xfree(pFont->info.props);
    pFont->info.nprops = 0;
    pFont->info.props = 0;
    xfree (pFont->info.isStringProp);
    xfree(bitmapFont);
    xfree(tables);
    return AllocError;
}