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/*
*
* Copyright © 2002 Keith Packard
*
* 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 "Xrenderint.h"
#include <limits.h>
XFilters *
XRenderQueryFilters (Display *dpy, Drawable drawable)
{
XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy);
XRenderInfo *xri;
xRenderQueryFiltersReq *req;
xRenderQueryFiltersReply rep;
XFilters *filters;
char *name;
char len;
unsigned int i;
unsigned long nbytesName, reply_left;
if (!RenderHasExtension (info))
return NULL;
if (!XRenderQueryFormats (dpy))
return NULL;
xri = info->info;
if (xri->minor_version < 6)
return NULL;
LockDisplay (dpy);
GetReq (RenderQueryFilters, req);
req->reqType = (CARD8) info->codes->major_opcode;
req->renderReqType = X_RenderQueryFilters;
req->drawable = (CARD32) drawable;
if (!_XReply (dpy, (xReply *) &rep, 0, xFalse))
{
UnlockDisplay (dpy);
SyncHandle ();
return NULL;
}
/*
* Limit each component of combined size to 1/4 the max, which is far
* more than they should ever possibly need.
*/
if ((rep.length < (INT_MAX >> 2)) &&
(rep.numFilters < ((INT_MAX / 4) / sizeof (char *))) &&
(rep.numAliases < ((INT_MAX / 4) / sizeof (short)))) {
unsigned long nbytes, nbytesAlias;
/*
* Compute total number of bytes for filter names
*/
nbytes = (unsigned long)rep.length << 2;
nbytesAlias = rep.numAliases * 2;
if (rep.numAliases & 1)
nbytesAlias += 2;
nbytesName = nbytes - nbytesAlias;
/*
* Allocate one giant block for the whole data structure
*/
filters = Xmalloc (sizeof (XFilters) +
(rep.numFilters * sizeof (char *)) +
(rep.numAliases * sizeof (short)) +
nbytesName);
} else
filters = NULL;
if (!filters)
{
_XEatDataWords(dpy, rep.length);
UnlockDisplay (dpy);
SyncHandle ();
return NULL;
}
/*
* Layout:
* XFilters
* numFilters char * pointers to filter names
* numAliases short alias values
* nbytesName char strings
*/
filters->nfilter = (int) rep.numFilters;
filters->nalias = (int) rep.numAliases;
filters->filter = (char **) (filters + 1);
filters->alias = (short *) (filters->filter + rep.numFilters);
name = (char *) (filters->alias + rep.numAliases);
/*
* Read the filter aliases
*/
_XRead16Pad (dpy, filters->alias, 2 * rep.numAliases);
reply_left = 8 + rep.length - 2 * rep.numAliases;;
/*
* Read the filter names
*/
for (i = 0; i < rep.numFilters; i++)
{
int l;
_XRead (dpy, &len, 1);
reply_left--;
l = len & 0xff;
if ((unsigned long)l + 1 > nbytesName) {
_XEatDataWords(dpy, reply_left);
Xfree(filters);
UnlockDisplay (dpy);
SyncHandle ();
return NULL;
}
nbytesName -= (unsigned long) (l + 1);
filters->filter[i] = name;
_XRead (dpy, name, l);
reply_left -= (unsigned long) l;
name[l] = '\0';
name += l + 1;
}
i = (unsigned) (name - (char *) (filters->alias + rep.numAliases));
if (i & 3)
_XEatData (dpy, 4 - (i & 3));
UnlockDisplay (dpy);
SyncHandle ();
return filters;
}
void
XRenderSetPictureFilter (Display *dpy,
Picture picture,
const char *filter,
XFixed *params,
int nparams)
{
XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy);
xRenderSetPictureFilterReq *req;
int nbytes = (int) strlen (filter);
RenderSimpleCheckExtension (dpy, info);
LockDisplay(dpy);
GetReq(RenderSetPictureFilter, req);
req->reqType = (CARD8) info->codes->major_opcode;
req->renderReqType = X_RenderSetPictureFilter;
req->picture = (CARD32) picture;
req->nbytes = (CARD16) nbytes;
req->length = (CARD16) (req->length + (((nbytes + 3) >> 2) + nparams));
Data (dpy, filter, nbytes);
Data (dpy, (_Xconst char *)params, (nparams << 2));
UnlockDisplay(dpy);
SyncHandle();
}
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