glx/swap_interval.c

   1 /*
   2  * (C) Copyright IBM Corporation 2006
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * THE COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #ifdef HAVE_DIX_CONFIG_H
  26 #include <dix-config.h>
  27 #endif
  28
  29 #include "glxserver.h"
  30 #include "glxutil.h"
  31 #include "glxext.h"
  32 #include "singlesize.h"
  33 #include "unpack.h"
  34 #include "indirect_size_get.h"
  35 #include "indirect_dispatch.h"
  36 #include "glxbyteorder.h"
  37
  38 static int DoSwapInterval(__GLXclientState * cl, GLbyte * pc, int do_swap);
  39
  40 int
  41 DoSwapInterval(__GLXclientState * cl, GLbyte * pc, int do_swap)
  42 {
  43     xGLXVendorPrivateReq *const req = (xGLXVendorPrivateReq *) pc;
  44     ClientPtr client = cl->client;
  45     const GLXContextTag tag = req->contextTag;
  46     __GLXcontext *cx;
  47     GLint interval;
  48
  49     cx = __glXLookupContextByTag(cl, tag);
  50
  51     if ((cx == NULL) || (cx->pGlxScreen == NULL)) {
  52         client->errorValue = tag;
  53         return __glXError(GLXBadContext);
  54     }
  55
  56     if (cx->pGlxScreen->swapInterval == NULL) {
  57         LogMessage(X_ERROR, "AIGLX: cx->pGlxScreen->swapInterval == NULL\n");
  58         client->errorValue = tag;
  59         return __glXError(GLXUnsupportedPrivateRequest);
  60     }
  61
  62     if (cx->drawPriv == NULL) {
  63         client->errorValue = tag;
  64         return BadValue;
  65     }
  66
  67     pc += __GLX_VENDPRIV_HDR_SIZE;
  68     interval = (do_swap)
  69         ? bswap_32(*(int *) (pc + 0))
  70         : *(int *) (pc + 0);
  71
  72     if (interval <= 0)
  73         return BadValue;
  74
  75     (void) (*cx->pGlxScreen->swapInterval) (cx->drawPriv, interval);
  76     return Success;
  77 }
  78
  79 int
  80 __glXDisp_SwapIntervalSGI(__GLXclientState * cl, GLbyte * pc)
  81 {
  82     return DoSwapInterval(cl, pc, 0);
  83 }
  84
  85 int
  86 __glXDispSwap_SwapIntervalSGI(__GLXclientState * cl, GLbyte * pc)
  87 {
  88     return DoSwapInterval(cl, pc, 1);
  89 }