Cursor.c

/*
 * $XFree86: xc/lib/Xfixes/Cursor.c,v 1.1 2002/11/30 06:21:44 keithp Exp $
 *
 * Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc.
 *
 * 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, and that the name of Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

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

void
XFixesSelectCursorInput (Display	*dpy,
			 Window		win,
			 unsigned long	eventMask)
{
    XFixesExtDisplayInfo	    *info = XFixesFindDisplay (dpy);
    xXFixesSelectCursorInputReq	    *req;

    XFixesSimpleCheckExtension (dpy, info);

    LockDisplay (dpy);
    GetReq (XFixesSelectCursorInput, req);
    req->reqType = info->codes->major_opcode;
    req->xfixesReqType = X_XFixesSelectCursorInput;
    req->window = win;
    req->eventMask = eventMask;
    UnlockDisplay (dpy);
    SyncHandle ();
}

XFixesCursorImage *
XFixesGetCursorImage (Display *dpy)
{
    XFixesExtDisplayInfo		*info = XFixesFindDisplay (dpy);
    xXFixesGetCursorImageAndNameReq	*req;
    xXFixesGetCursorImageAndNameReply	rep;
    int					npixels;
    int					nbytes_name;
    int					nbytes, nread, rlength;
    XFixesCursorImage			*image;
    char				*name;

    XFixesCheckExtension (dpy, info, 0);
    LockDisplay (dpy);
    GetReq (XFixesGetCursorImageAndName, req);
    req->reqType = info->codes->major_opcode;
    if (info->major_version >= 2)
	req->xfixesReqType = X_XFixesGetCursorImageAndName;
    else
	req->xfixesReqType = X_XFixesGetCursorImage;
    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse))
    {
	UnlockDisplay (dpy);
	SyncHandle ();
	return 0;
    }
    if (info->major_version < 2)
    {
	rep.cursorName = None;
	rep.nbytes = 0;
    }
    npixels = rep.width * rep.height;
    nbytes_name = rep.nbytes;
    /* reply data length */
    nbytes = (long) rep.length << 2;
    /* bytes of actual data in the reply */
    nread = (npixels << 2) + nbytes_name;
    /* size of data returned to application */
    rlength = (sizeof (XFixesCursorImage) + 
	       npixels * sizeof (unsigned long) +
	       nbytes_name + 1);

    image = (XFixesCursorImage *) Xmalloc (rlength);
    if (!image)
    {
	_XEatData (dpy, nbytes);
	UnlockDisplay (dpy);
	SyncHandle ();
	return 0;
    }
    image->x = rep.x;
    image->y = rep.y;
    image->width = rep.width;
    image->height = rep.height;
    image->xhot = rep.xhot;
    image->yhot = rep.yhot;
    image->cursor_serial = rep.cursorSerial;
    image->pixels = (unsigned long *) (image + 1);
    image->atom = rep.cursorName;
    name = (char *) (image->pixels + npixels);
    image->name = name;
    _XRead32 (dpy, image->pixels, npixels << 2);
    _XRead (dpy, name, nbytes_name);
    name[nbytes_name] = '\0';	/* null-terminate */
    /* skip any padding */
    if(nbytes > nread)
    {
	_XEatData (dpy, (unsigned long) (nbytes - nread));
    }
    UnlockDisplay (dpy);
    SyncHandle ();
    return image;
}

void
XFixesSetCursorName (Display *dpy, Cursor cursor, const char *name)
{
    XFixesExtDisplayInfo	*info = XFixesFindDisplay (dpy);
    xXFixesSetCursorNameReq	*req;
    int				nbytes = strlen (name);

    XFixesSimpleCheckExtension (dpy, info);
    if (info->major_version < 2)
	return;
    LockDisplay (dpy);
    GetReq (XFixesSetCursorName, req);
    req->reqType = info->codes->major_opcode;
    req->xfixesReqType = X_XFixesSetCursorName;
    req->cursor = cursor;
    req->nbytes = nbytes;
    req->length += (nbytes + 3) >> 2;
    Data (dpy, name, nbytes);
    UnlockDisplay (dpy);
    SyncHandle ();
}

const char *
XFixesGetCursorName (Display *dpy, Cursor cursor, Atom *atom)
{
    XFixesExtDisplayInfo	*info = XFixesFindDisplay (dpy);
    xXFixesGetCursorNameReq	*req;
    xXFixesGetCursorNameReply	rep;
    char			*name;

    XFixesCheckExtension (dpy, info, 0);
    if (info->major_version < 2)
	return 0;
    LockDisplay (dpy);
    GetReq (XFixesGetCursorName, req);
    req->reqType = info->codes->major_opcode;
    req->xfixesReqType = X_XFixesGetCursorName;
    req->cursor = cursor;
    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse))
    {
	UnlockDisplay (dpy);
	SyncHandle ();
	return 0;
    }
    *atom = rep.atom;
    if ((name = (char *) Xmalloc(rep.nbytes+1))) {
	_XReadPad(dpy, name, (long)rep.nbytes);
	name[rep.nbytes] = '\0';
    } else {
	_XEatData(dpy, (unsigned long) (rep.nbytes + 3) & ~3);
	name = (char *) NULL;
    }
    UnlockDisplay(dpy);
    SyncHandle();
    return(name);
}

void
XFixesChangeCursor (Display *dpy, Cursor source, Cursor destination)
{
    XFixesExtDisplayInfo	*info = XFixesFindDisplay (dpy);
    xXFixesChangeCursorReq	*req;

    XFixesSimpleCheckExtension (dpy, info);
    if (info->major_version < 2)
	return;
    LockDisplay (dpy);
    GetReq (XFixesChangeCursor, req);
    req->reqType = info->codes->major_opcode;
    req->xfixesReqType = X_XFixesChangeCursor;
    req->source = source;
    req->destination = destination;
    UnlockDisplay(dpy);
    SyncHandle();
}

void
XFixesChangeCursorByName (Display *dpy, Cursor source, const char *name)
{
    XFixesExtDisplayInfo	    *info = XFixesFindDisplay (dpy);
    xXFixesChangeCursorByNameReq    *req;
    int				    nbytes = strlen (name);

    XFixesSimpleCheckExtension (dpy, info);
    if (info->major_version < 2)
	return;
    LockDisplay (dpy);
    GetReq (XFixesChangeCursorByName, req);
    req->reqType = info->codes->major_opcode;
    req->xfixesReqType = X_XFixesChangeCursorByName;
    req->source = source;
    req->nbytes = nbytes;
    req->length += (nbytes + 3) >> 2;
    Data (dpy, name, nbytes);
    UnlockDisplay(dpy);
    SyncHandle();
}