/* $XConsortium: bitsource.c,v 1.9 94/04/17 20:16:59 gildea Exp $ */

/*

Copyright (c) 1991  X Consortium

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
X CONSORTIUM 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 X Consortium 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 X Consortium.

*/

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

#include "fntfilst.h"

BitmapSourcesRec	FontFileBitmapSources;

Bool
FontFileRegisterBitmapSource (fpe)
    FontPathElementPtr	fpe;
{
    FontPathElementPtr	*new;
    int			i;
    int			newsize;

    for (i = 0; i < FontFileBitmapSources.count; i++)
	if (FontFileBitmapSources.fpe[i] == fpe)
	    return TRUE;
    if (FontFileBitmapSources.count == FontFileBitmapSources.size)
    {
	newsize = FontFileBitmapSources.size + 4;
	new = (FontPathElementPtr *) xrealloc (FontFileBitmapSources.fpe, newsize * sizeof *new);
	if (!new)
	    return FALSE;
	FontFileBitmapSources.size = newsize;
	FontFileBitmapSources.fpe = new;
    }
    FontFileBitmapSources.fpe[FontFileBitmapSources.count++] = fpe;
    return TRUE;
}

void
FontFileUnregisterBitmapSource (fpe)
    FontPathElementPtr	fpe;
{
    int	    i;

    for (i = 0; i < FontFileBitmapSources.count; i++)
	if (FontFileBitmapSources.fpe[i] == fpe)
	{
	    FontFileBitmapSources.count--;
	    if (FontFileBitmapSources.count == 0)
	    {
		FontFileBitmapSources.size = 0;
		xfree (FontFileBitmapSources.fpe);
		FontFileBitmapSources.fpe = 0;
	    }
	    else
	    {
	    	for (; i < FontFileBitmapSources.count; i++)
		    FontFileBitmapSources.fpe[i] = FontFileBitmapSources.fpe[i+1];
	    }
	    break;
	}
}

/*
 * Our set_path_hook: unregister all bitmap sources.
 * This is necessary because already open fonts will keep their FPEs
 * allocated, but they may not be on the new font path.
 * The bitmap sources in the new path will be registered by the init_func.
 */
void
FontFileEmptyBitmapSource()
{
    if (FontFileBitmapSources.count == 0)
	return;

    FontFileBitmapSources.count = 0;
    FontFileBitmapSources.size = 0;
    xfree (FontFileBitmapSources.fpe);
    FontFileBitmapSources.fpe = 0;
}

FontFileMatchBitmapSource (fpe, pFont, flags, entry, zeroPat, vals, format, fmask, noSpecificSize)
    FontPathElementPtr	fpe;
    FontPtr		*pFont;
    int			flags;
    FontEntryPtr	entry;
    FontNamePtr		zeroPat;
    FontScalablePtr	vals;
    fsBitmapFormat	format;
    fsBitmapFormatMask	fmask;
    Bool		noSpecificSize;
{
    int			source;
    FontEntryPtr	zero;
    FontBitmapEntryPtr	bitmap;
    int			ret;
    FontDirectoryPtr	dir;
    FontScaledPtr	scaled;

    /*
     * Look through all the registered bitmap sources for
     * the same zero name as ours; entries along that one
     * can be scaled as desired.
     */
    ret = BadFontName;
    for (source = 0; source < FontFileBitmapSources.count; source++)
    {
    	if (FontFileBitmapSources.fpe[source] == fpe)
	    continue;
	dir = (FontDirectoryPtr) FontFileBitmapSources.fpe[source]->private;
	zero = FontFileFindNameInDir (&dir->scalable, zeroPat);
	if (!zero)
	    continue;
    	scaled = FontFileFindScaledInstance (zero, vals, noSpecificSize);
    	if (scaled)
    	{
	    if (scaled->pFont)
	    {
		*pFont = scaled->pFont;
		(*pFont)->fpe = FontFileBitmapSources.fpe[source];
		ret = Successful;
	    }
	    else if (scaled->bitmap)
	    {
		entry = scaled->bitmap;
		bitmap = &entry->u.bitmap;
		if (bitmap->pFont)
		{
		    *pFont = bitmap->pFont;
		    (*pFont)->fpe = FontFileBitmapSources.fpe[source];
		    ret = Successful;
		}
		else
		{
		    ret = FontFileOpenBitmap (
				FontFileBitmapSources.fpe[source],
				pFont, flags, entry, format, fmask);
		    if (ret == Successful && *pFont)
			(*pFont)->fpe = FontFileBitmapSources.fpe[source];
		}
	    }
	    else /* "cannot" happen */
	    {
		ret = BadFontName;
	    }
	    break;
    	}
    }
    return ret;
}