fsconvert.c

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    fsRange *expected_ranges;
{
    register FSFontPtr fsfont;
    register FSFontDataRec *fsd;
    register int i;

    fsfont = (FSFontPtr) pfont->fontPrivate;
    fsd = (FSFontDataRec *) pfont->fpePrivate;
    if (fsfont->encoding)
    {
	fsRange full_range[1];
	if (!num_expected_ranges)
	{
	    full_range[0].min_char_low = pfont->info.firstCol;
	    full_range[0].min_char_high = pfont->info.firstRow;
	    full_range[0].max_char_low = pfont->info.lastCol;
	    full_range[0].max_char_high = pfont->info.lastRow;
	    num_expected_ranges = 1;
	    expected_ranges = full_range;
	}

	for (i = 0; i < num_expected_ranges; i++)
	{
	    int row, col;
	    for (row = expected_ranges[i].min_char_high;
		 row <= expected_ranges[i].max_char_high;
		 row++)
	    {
		register CharInfoPtr encoding = fsfont->encoding +
		    ((row - pfont->info.firstRow) *
		     (pfont->info.lastCol -
		      pfont->info.firstCol + 1) +
		     expected_ranges[i].min_char_low -
		     pfont->info.firstCol);
		for (col = expected_ranges[i].min_char_low;
		     col <= expected_ranges[i].max_char_low;
		     encoding++, col++)
		{
		    if (encoding->bits == &_fs_glyph_requested)
			encoding->bits = &_fs_glyph_undefined;
		}
	    }
	}
    }
}


/*
 * figures out what extents to request
 * this is where lots of extra
 * smarts wants to live
 */
/* ARGSUSED */
int
_fs_check_extents(pfont, flags, nranges, range, blockrec)
    FontPtr     pfont;
    Mask        flags;
    int         nranges;
    fsRange    *range;
    FSBlockDataPtr blockrec;
{
/* XXX -- either fill in the requested info if we have it somewhere
 * and return AccessDone, or else return Successful
 */
    return Successful;
}

/*
 * figures out what glyphs to request
 * this is where lots of extra
 * smarts wants to live
 */
/* ARGSUSED */
int
_fs_check_bitmaps(pfont, format, flags, nranges, range, blockrec)
    FontPtr     pfont;
    fsBitmapFormat format;
    Mask        flags;
    int         nranges;
    fsRange    *range;
    FSBlockDataPtr blockrec;
{
/* XXX -- either fill in the requested info if we have it somewhere
 * and return AccessDone, or else return Successful
 */
    return Successful;
}

int
_fs_get_glyphs(pFont, count, chars, charEncoding, glyphCount, glyphs)
    FontPtr     pFont;
    unsigned long count;
    register unsigned char *chars;
    FontEncoding charEncoding;
    unsigned long *glyphCount;	/* RETURN */
    CharInfoPtr *glyphs;	/* RETURN */
{
    FSFontPtr   fsdata;
    unsigned int firstCol;
    register unsigned int numCols;
    unsigned int firstRow;
    unsigned int numRows;
    CharInfoPtr *glyphsBase;
    register unsigned int c;
    register CharInfoPtr pci;
    unsigned int r;
    CharInfoPtr encoding;
    CharInfoPtr pDefault;
    FSFontDataPtr fsd = (FSFontDataPtr) pFont->fpePrivate;
    int         itemSize;
    int         err = Successful;

    fsdata = (FSFontPtr) pFont->fontPrivate;
    encoding = fsdata->encoding;
    pDefault = fsdata->pDefault;
    firstCol = pFont->info.firstCol;
    numCols = pFont->info.lastCol - firstCol + 1;
    glyphsBase = glyphs;


    if (charEncoding == Linear8Bit || charEncoding == TwoD8Bit)
	itemSize = 1;
    else
	itemSize = 2;

    /* In this age of glyph caching, any glyphs gotten through this
       procedure should already be loaded.  If they are not, we are
       dealing with someone (perhaps a ddx driver optimizing a font)
       that doesn't understand the finer points of glyph caching.  The
       CHECK_ENCODING macro checks for this condition...  if found, it
       calls fs_load_all_glyphs(), which corrects it.  Since the caller
       of this code will not know how to handle a return value of
       Suspended, the fs_load_all_glyphs() procedure will block and
       freeze the server until the load operation is done.  Moral: the
       glyphCachingMode flag really must indicate the capabilities of
       the ddx drivers.  */

#define CHECK_ENCODING(cnum) \
    ( pci = encoding + (cnum), \
      fsd->glyphs_to_get ? \
      ( pci->bits == &_fs_glyph_undefined || pci->bits == &_fs_glyph_requested ? \
	((err = fs_load_all_glyphs(pFont)), pci) : \
	pci ) : \
      pci )

    switch (charEncoding) {

    case Linear8Bit:
    case TwoD8Bit:
	if (pFont->info.firstRow > 0)
	    break;
	if (pFont->info.allExist && pDefault) {
	    while (err == Successful && count--) {
		c = (*chars++) - firstCol;
		if (c < numCols)
		    *glyphs++ = CHECK_ENCODING(c);
		else
		    *glyphs++ = pDefault;
	    }
	} else {
	    while (err == Successful && count--) {
		c = (*chars++) - firstCol;
		if (c < numCols && CHECK_ENCODING(c)->bits)
		    *glyphs++ = pci;
		else if (pDefault)
		    *glyphs++ = pDefault;
	    }
	}
	break;
    case Linear16Bit:
	if (pFont->info.allExist && pDefault) {
	    while (err == Successful && count--) {
		c = *chars++ << 8;
		c = (c | *chars++) - firstCol;
		if (c < numCols)
		    *glyphs++ = CHECK_ENCODING(c);
		else
		    *glyphs++ = pDefault;
	    }
	} else {
	    while (err == Successful && count--) {
		c = *chars++ << 8;
		c = (c | *chars++) - firstCol;
		if (c < numCols && CHECK_ENCODING(c)->bits)
		    *glyphs++ = pci;
		else if (pDefault)
		    *glyphs++ = pDefault;
	    }
	}
	break;

    case TwoD16Bit:
	firstRow = pFont->info.firstRow;
	numRows = pFont->info.lastRow - firstRow + 1;
	while (err == Successful && count--) {
	    r = (*chars++) - firstRow;
	    c = (*chars++) - firstCol;
	    if (r < numRows && c < numCols &&
		    CHECK_ENCODING(r * numCols + c)->bits)
		*glyphs++ = pci;
	    else if (pDefault)
		*glyphs++ = pDefault;
	}
	break;
    }
    *glyphCount = glyphs - glyphsBase;
    return err;
}


static int
_fs_get_metrics(pFont, count, chars, charEncoding, glyphCount, glyphs)
    FontPtr     pFont;
    unsigned long count;
    register unsigned char *chars;
    FontEncoding charEncoding;
    unsigned long *glyphCount;	/* RETURN */
    xCharInfo **glyphs;		/* RETURN */
{
    FSFontPtr   fsdata;
    unsigned int firstCol;
    register unsigned int numCols;
    unsigned int firstRow;
    unsigned int numRows;
    xCharInfo **glyphsBase;
    register unsigned int c;
    unsigned int r;
    CharInfoPtr encoding;
    CharInfoPtr pDefault;
    FSFontDataPtr fsd = (FSFontDataPtr) pFont->fpePrivate;
    int         itemSize;
    int         err = Successful;

    fsdata = (FSFontPtr) pFont->fontPrivate;
    encoding = fsdata->inkMetrics;
    pDefault = fsdata->pDefault;
    firstCol = pFont->info.firstCol;
    numCols = pFont->info.lastCol - firstCol + 1;
    glyphsBase = glyphs;


    /* XXX - this should be much smarter */
    /* make sure the glyphs are there */
    if (charEncoding == Linear8Bit || charEncoding == TwoD8Bit)
	itemSize = 1;
    else
	itemSize = 2;

    switch (charEncoding) {

    case Linear8Bit:
    case TwoD8Bit:
	if (pFont->info.firstRow > 0)
	    break;
	if (pFont->info.allExist && pDefault) {
	    while (count--) {
		c = (*chars++) - firstCol;
		if (c < numCols)
		    *glyphs++ = (xCharInfo *)&encoding[c];
		else
		    *glyphs++ = (xCharInfo *)pDefault;
	    }
	} else {
	    while (count--) {
		c = (*chars++) - firstCol;
		if (c < numCols)
		    *glyphs++ = (xCharInfo *)(encoding + c);
		else if (pDefault)
		    *glyphs++ = (xCharInfo *)pDefault;
	    }
	}
	break;
    case Linear16Bit:
	if (pFont->info.allExist && pDefault) {
	    while (count--) {
		c = *chars++ << 8;
		c = (c | *chars++) - firstCol;
		if (c < numCols)
		    *glyphs++ = (xCharInfo *)(encoding + c);
		else
		    *glyphs++ = (xCharInfo *)pDefault;
	    }
	} else {
	    while (count--) {
		c = *chars++ << 8;
		c = (c | *chars++) - firstCol;
		if (c < numCols)
		    *glyphs++ = (xCharInfo *)(encoding + c);
		else if (pDefault)
		    *glyphs++ = (xCharInfo *)pDefault;
	    }
	}
	break;

    case TwoD16Bit:
	firstRow = pFont->info.firstRow;
	numRows = pFont->info.lastRow - firstRow + 1;
	while (count--) {
	    r = (*chars++) - firstRow;
	    c = (*chars++) - firstCol;
	    if (r < numRows && c < numCols)
		*glyphs++ = (xCharInfo *)(encoding + (r * numCols + c));
	    else if (pDefault)
		*glyphs++ = (xCharInfo *)pDefault;
	}
	break;
    }
    *glyphCount = glyphs - glyphsBase;
    return Successful;
}


void
_fs_unload_font(pfont)
    FontPtr     pfont;
{
    FSFontPtr   fsdata = (FSFontPtr) pfont->fontPrivate;

    if (fsdata->encoding)
    {
	register int i;
	register CharInfoPtr encoding = fsdata->encoding;
	FontInfoPtr pfi = &pfont->info;
	for (i = (pfi->lastCol - pfi->firstCol + 1) *
	         (pfi->lastRow - pfi->firstRow + 1);
	     i > 0;
	     encoding++, i--)
	{
	    if (encoding->bits &&
		encoding->bits != &_fs_glyph_undefined &&
		encoding->bits != &_fs_glyph_requested &&
		encoding->bits != &_fs_glyph_zero_length)
		xfree(encoding->bits);
	}
    }
    xfree(fsdata->encoding);
    xfree(fsdata);

    pfont->fontPrivate = 0;
}

void
_fs_init_font(pfont)
    FontPtr     pfont;
{
    /* set font function pointers */
    pfont->get_glyphs = _fs_get_glyphs;
    pfont->get_metrics = _fs_get_metrics;
    pfont->unload_font = _fs_unload_font;
    pfont->unload_glyphs = (void (*)())0;
}