ref: b76e8ecc732cb311ceee6fd6c807b7e784d3fe31
dir: /sys/src/ape/X11/lib/Xrender/Trap.c/
/*
*
* 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"
void
XRenderCompositeTrapezoids (Display *dpy,
int op,
Picture src,
Picture dst,
_Xconst XRenderPictFormat *maskFormat,
int xSrc,
int ySrc,
_Xconst XTrapezoid *traps,
int ntrap)
{
XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy);
xRenderTrapezoidsReq *req;
int n;
long len;
unsigned long max_req = dpy->bigreq_size ? dpy->bigreq_size : dpy->max_request_size;
RenderSimpleCheckExtension (dpy, info);
LockDisplay(dpy);
while (ntrap)
{
GetReq(RenderTrapezoids, req);
req->reqType = info->codes->major_opcode;
req->renderReqType = X_RenderTrapezoids;
req->op = (CARD8) op;
req->src = src;
req->dst = dst;
req->maskFormat = maskFormat ? maskFormat->id : 0;
req->xSrc = xSrc;
req->ySrc = ySrc;
n = ntrap;
len = ((long) n) * (SIZEOF (xTrapezoid) >> 2);
if (len > (max_req - req->length)) {
n = (max_req - req->length) / (SIZEOF (xTrapezoid) >> 2);
len = ((long)n) * (SIZEOF (xTrapezoid) >> 2);
}
SetReqLen (req, len, len);
len <<= 2;
DataInt32 (dpy, (int *) traps, len);
ntrap -= n;
traps += n;
}
UnlockDisplay(dpy);
SyncHandle();
}