xserver

xserver with xephyr scale patch
git clone https://git.neptards.moe/u3shit/xserver.git
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clientinfo.c (4176B)

      1 /*
      2  * Copyright © 2011 Intel Corporation
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the next
     12  * paragraph) shall be included in all copies or substantial portions of the
     13  * Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     21  * DEALINGS IN THE SOFTWARE.
     22  */
     23 #ifdef HAVE_DIX_CONFIG_H
     24 #include <dix-config.h>
     25 #endif
     26 
     27 #include "glxserver.h"
     28 #include "indirect_dispatch.h"
     29 #include "glxbyteorder.h"
     30 #include "unpack.h"
     31 
     32 static int
     33 set_client_info(__GLXclientState * cl, xGLXSetClientInfoARBReq * req,
     34                 unsigned bytes_per_version)
     35 {
     36     ClientPtr client = cl->client;
     37     char *gl_extensions;
     38     char *glx_extensions;
     39     int size;
     40 
     41     REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq);
     42 
     43     /* Verify that the size of the packet matches the size inferred from the
     44      * sizes specified for the various fields.
     45      */
     46     size = sz_xGLXSetClientInfoARBReq;
     47     size = safe_add(size, safe_mul(req->numVersions, bytes_per_version));
     48     size = safe_add(size, safe_pad(req->numGLExtensionBytes));
     49     size = safe_add(size, safe_pad(req->numGLXExtensionBytes));
     50 
     51     if (size < 0 || req->length != (size / 4))
     52         return BadLength;
     53 
     54     /* Verify that the actual length of the GL extension string matches what's
     55      * encoded in protocol packet.
     56      */
     57     gl_extensions = (char *) (req + 1) + (req->numVersions * bytes_per_version);
     58     if (req->numGLExtensionBytes != 0
     59         && memchr(gl_extensions, 0,
     60                   __GLX_PAD(req->numGLExtensionBytes)) == NULL)
     61         return BadLength;
     62 
     63     /* Verify that the actual length of the GLX extension string matches
     64      * what's encoded in protocol packet.
     65      */
     66     glx_extensions = gl_extensions + __GLX_PAD(req->numGLExtensionBytes);
     67     if (req->numGLXExtensionBytes != 0
     68         && memchr(glx_extensions, 0,
     69                   __GLX_PAD(req->numGLXExtensionBytes)) == NULL)
     70         return BadLength;
     71 
     72     free(cl->GLClientextensions);
     73     cl->GLClientextensions = strdup(gl_extensions);
     74 
     75     return 0;
     76 }
     77 
     78 int
     79 __glXDisp_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
     80 {
     81     return set_client_info(cl, (xGLXSetClientInfoARBReq *) pc, 8);
     82 }
     83 
     84 int
     85 __glXDispSwap_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
     86 {
     87     ClientPtr client = cl->client;
     88     xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc;
     89 
     90     REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq);
     91 
     92     req->length = bswap_16(req->length);
     93     req->numVersions = bswap_32(req->numVersions);
     94     req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes);
     95     req->numGLXExtensionBytes = bswap_32(req->numGLXExtensionBytes);
     96 
     97     return __glXDisp_SetClientInfoARB(cl, pc);
     98 }
     99 
    100 int
    101 __glXDisp_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc)
    102 {
    103     return set_client_info(cl, (xGLXSetClientInfoARBReq *) pc, 12);
    104 }
    105 
    106 int
    107 __glXDispSwap_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc)
    108 {
    109     ClientPtr client = cl->client;
    110     xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc;
    111 
    112     REQUEST_AT_LEAST_SIZE(xGLXSetClientInfoARBReq);
    113 
    114     req->length = bswap_16(req->length);
    115     req->numVersions = bswap_32(req->numVersions);
    116     req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes);
    117     req->numGLXExtensionBytes = bswap_32(req->numGLXExtensionBytes);
    118 
    119     return __glXDisp_SetClientInfo2ARB(cl, pc);
    120 }