IABSD.fr/xenocara/lib/libXrender/src/Trap.c

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• Author : matthieu
  Date : 2022-11-06 17:49:17
  Hash : 3b0b5ae7
  Message : Update libXrender to version 0.9.11

• lib/libXrender/src/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);
      unsigned long	    max_req = dpy->bigreq_size ? dpy->bigreq_size : dpy->max_request_size;
  
      RenderSimpleCheckExtension (dpy, info);
      LockDisplay(dpy);
      while (ntrap)
      {
  	xRenderTrapezoidsReq	*req;
  	int			n;
  	unsigned long		len;
  
  	GetReq(RenderTrapezoids, req);
  	req->reqType = (CARD8) info->codes->major_opcode;
  	req->renderReqType = X_RenderTrapezoids;
  	req->op = (CARD8) op;
  	req->src = (CARD32) src;
  	req->dst = (CARD32) dst;
  	req->maskFormat = (CARD32) (maskFormat ? maskFormat->id : 0);
  	req->xSrc = (INT16) xSrc;
  	req->ySrc = (INT16) ySrc;
  	n = ntrap;
  	len = ((unsigned long) n) * (SIZEOF (xTrapezoid) >> 2);
  	if (len > (max_req - req->length)) {
  	    n = (int) ((max_req - req->length) / (SIZEOF (xTrapezoid) >> 2));
  	    len = ((unsigned long) n) * (SIZEOF (xTrapezoid) >> 2);
  	}
  	SetReqLen (req, len, len);
  	len <<= 2;
  	DataInt32 (dpy, (_Xconst int *) traps, len);
  	ntrap -= n;
  	traps += n;
      }
      UnlockDisplay(dpy);
      SyncHandle();
  }