/* $XConsortium: Font.c /main/29 1996/10/22 14:18:35 kaleb $ */
/*

Copyright (c) 1986  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.

*/

#define NEED_REPLIES
#include "Xlibint.h"

static XFontStruct *_XQueryFont();

#if NeedFunctionPrototypes
XFontStruct *XLoadQueryFont(
   register Display *dpy,
   _Xconst char *name)
#else
XFontStruct *XLoadQueryFont(dpy, name)
   register Display *dpy;
   char *name;
#endif
{
    XFontStruct *font_result;
    register long nbytes;
    Font fid;
    xOpenFontReq *req;
    unsigned long seq;

    LockDisplay(dpy);
    GetReq(OpenFont, req);
    seq = dpy->request;
    nbytes = req->nbytes  = name ? strlen(name) : 0;
    req->fid = fid = XAllocID(dpy);
    req->length += (nbytes+3)>>2;
    Data (dpy, name, nbytes);
    font_result = _XQueryFont(dpy, fid, seq);
    UnlockDisplay(dpy);
    SyncHandle();
    return font_result;
}

XFreeFont(dpy, fs)
    register Display *dpy;
    XFontStruct *fs;
{ 
    register xResourceReq *req;
    register _XExtension *ext;

    LockDisplay(dpy);
    /* call out to any extensions interested */
    for (ext = dpy->ext_procs; ext; ext = ext->next)
	if (ext->free_Font) (*ext->free_Font)(dpy, fs, &ext->codes);
    GetResReq (CloseFont, fs->fid, req);
    UnlockDisplay(dpy);
    SyncHandle();
    _XFreeExtData(fs->ext_data);
    if (fs->per_char)
       Xfree ((char *) fs->per_char);
    if (fs->properties)
       Xfree ((char *) fs->properties);
    Xfree ((char *) fs);
    return 1;
}

static XFontStruct *
_XQueryFont (dpy, fid, seq)
    register Display *dpy;
    Font fid;
    unsigned long seq;
{
    register XFontStruct *fs;
    register long nbytes;
    xQueryFontReply reply;
    register xResourceReq *req;
    register _XExtension *ext;
    _XAsyncHandler async;
    _XAsyncErrorState async_state;

    if (seq) {
	async_state.min_sequence_number = seq;
	async_state.max_sequence_number = seq;
	async_state.error_code = BadName;
	async_state.major_opcode = X_OpenFont;
	async_state.minor_opcode = 0;
	async_state.error_count = 0;
	async.next = dpy->async_handlers;
	async.handler = _XAsyncErrorHandler;
	async.data = (XPointer)&async_state;
	dpy->async_handlers = &async;
    }
    GetResReq(QueryFont, fid, req);
    if (!_XReply (dpy, (xReply *) &reply,
       ((SIZEOF(xQueryFontReply) - SIZEOF(xReply)) >> 2), xFalse)) {
	if (seq)
	    DeqAsyncHandler(dpy, &async);
	return (XFontStruct *)NULL;
    }
    if (seq)
	DeqAsyncHandler(dpy, &async);
    if (! (fs = (XFontStruct *) Xmalloc (sizeof (XFontStruct)))) {
	_XEatData(dpy, (unsigned long)(reply.nFontProps * SIZEOF(xFontProp) +
				       reply.nCharInfos * SIZEOF(xCharInfo)));
	return (XFontStruct *)NULL;
    }
    fs->ext_data 		= NULL;
    fs->fid 			= fid;
    fs->direction 		= reply.drawDirection;
    fs->min_char_or_byte2	= reply.minCharOrByte2;
    fs->max_char_or_byte2 	= reply.maxCharOrByte2;
    fs->min_byte1 		= reply.minByte1;
    fs->max_byte1 		= reply.maxByte1;
    fs->default_char 		= reply.defaultChar;
    fs->all_chars_exist 	= reply.allCharsExist;
    fs->ascent 			= cvtINT16toInt (reply.fontAscent);
    fs->descent 		= cvtINT16toInt (reply.fontDescent);
    
#ifdef MUSTCOPY
    {
	xCharInfo *xcip;

	xcip = (xCharInfo *) &reply.minBounds;
	fs->min_bounds.lbearing = cvtINT16toShort(xcip->leftSideBearing);
	fs->min_bounds.rbearing = cvtINT16toShort(xcip->rightSideBearing);
	fs->min_bounds.width = cvtINT16toShort(xcip->characterWidth);
	fs->min_bounds.ascent = cvtINT16toShort(xcip->ascent);
	fs->min_bounds.descent = cvtINT16toShort(xcip->descent);
	fs->min_bounds.attributes = xcip->attributes;

	xcip = (xCharInfo *) &reply.maxBounds;
	fs->max_bounds.lbearing = cvtINT16toShort(xcip->leftSideBearing);
	fs->max_bounds.rbearing =  cvtINT16toShort(xcip->rightSideBearing);
	fs->max_bounds.width =  cvtINT16toShort(xcip->characterWidth);
	fs->max_bounds.ascent =  cvtINT16toShort(xcip->ascent);
	fs->max_bounds.descent =  cvtINT16toShort(xcip->descent);
	fs->max_bounds.attributes = xcip->attributes;
    }
#else
    /* XXX the next two statements won't work if short isn't 16 bits */
    fs->min_bounds = * (XCharStruct *) &reply.minBounds;
    fs->max_bounds = * (XCharStruct *) &reply.maxBounds;
#endif /* MUSTCOPY */

    fs->n_properties = reply.nFontProps;
    /* 
     * if no properties defined for the font, then it is bad
     * font, but shouldn't try to read nothing.
     */
    fs->properties = NULL;
    if (fs->n_properties > 0) {
	    nbytes = reply.nFontProps * sizeof(XFontProp);
	    fs->properties = (XFontProp *) Xmalloc ((unsigned) nbytes);
	    nbytes = reply.nFontProps * SIZEOF(xFontProp);
	    if (! fs->properties) {
		Xfree((char *) fs);
		_XEatData(dpy, (unsigned long)
			  (nbytes + reply.nCharInfos * SIZEOF(xCharInfo)));
		return (XFontStruct *)NULL;
	    }
	    _XRead32 (dpy, (char *)fs->properties, nbytes);
    }
    /*
     * If no characters in font, then it is a bad font, but
     * shouldn't try to read nothing.
     */
    /* have to unpack charinfos on some machines (CRAY) */
    fs->per_char = NULL;
    if (reply.nCharInfos > 0){
	nbytes = reply.nCharInfos * sizeof(XCharStruct);
	if (! (fs->per_char = (XCharStruct *) Xmalloc ((unsigned) nbytes))) {
	    if (fs->properties) Xfree((char *) fs->properties);
	    Xfree((char *) fs);
	    _XEatData(dpy, (unsigned long)
			    (reply.nCharInfos * SIZEOF(xCharInfo)));
	    return (XFontStruct *)NULL;
	}
	    
#ifdef MUSTCOPY
	{
	    register XCharStruct *cs = fs->per_char;
	    register int i;

	    for (i = 0; i < reply.nCharInfos; i++, cs++) {
		xCharInfo xcip;

		_XRead(dpy, (char *)&xcip, SIZEOF(xCharInfo));
		cs->lbearing = cvtINT16toShort(xcip.leftSideBearing);
		cs->rbearing = cvtINT16toShort(xcip.rightSideBearing);
		cs->width =  cvtINT16toShort(xcip.characterWidth);
		cs->ascent =  cvtINT16toShort(xcip.ascent);
		cs->descent =  cvtINT16toShort(xcip.descent);
		cs->attributes = xcip.attributes;
	    }
	}
#else
	nbytes = reply.nCharInfos * SIZEOF(xCharInfo);
	_XRead16 (dpy, (char *)fs->per_char, nbytes);
#endif
    }

    /* call out to any extensions interested */
    for (ext = dpy->ext_procs; ext; ext = ext->next)
	if (ext->create_Font) (*ext->create_Font)(dpy, fs, &ext->codes);
    return fs;
}


XFontStruct *XQueryFont (dpy, fid)
    register Display *dpy;
    Font fid;
{
    XFontStruct *font_result;

    LockDisplay(dpy);
    font_result = _XQueryFont(dpy, fid, 0L);
    UnlockDisplay(dpy);
    SyncHandle();
    return font_result;
}