IABSD.fr/xenocara/xserver/glx/indirect_program.c

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• Author : matthieu
  Date : 2019-07-27 07:57:06
  Hash : a77e9959
  Message : Update to xserver 1.20.5. Tested by jsg@

• xserver/glx/indirect_program.c

• /*
   * (C) Copyright IBM Corporation 2005, 2006
   * All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sub license,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
   * THE COPYRIGHT HOLDERS, THE AUTHORS, AND/OR THEIR SUPPLIERS BE LIABLE FOR
   * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
   * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  /**
   * \file indirect_program.c
   * Hand-coded routines needed to support programmable pipeline extensions.
   *
   * \author Ian Romanick <idr@us.ibm.com>
   */
  
  #ifdef HAVE_DIX_CONFIG_H
  #include <dix-config.h>
  #endif
  
  #include "glxserver.h"
  #include "glxbyteorder.h"
  #include "glxext.h"
  #include "singlesize.h"
  #include "unpack.h"
  #include "indirect_size_get.h"
  #include "indirect_dispatch.h"
  
  /**
   * Handle both types of glGetProgramString calls.
   */
  static int
  DoGetProgramString(struct __GLXclientStateRec *cl, GLbyte * pc,
                     PFNGLGETPROGRAMIVARBPROC get_programiv,
                     PFNGLGETPROGRAMSTRINGARBPROC get_program_string,
                     Bool do_swap)
  {
      xGLXVendorPrivateWithReplyReq *const req =
          (xGLXVendorPrivateWithReplyReq *) pc;
      int error;
      __GLXcontext *const cx = __glXForceCurrent(cl, req->contextTag, &error);
      ClientPtr client = cl->client;
  
      REQUEST_FIXED_SIZE(xGLXVendorPrivateWithReplyReq, 8);
  
      pc += __GLX_VENDPRIV_HDR_SIZE;
      if (cx != NULL) {
          GLenum target;
          GLenum pname;
          GLint compsize = 0;
          char *answer = NULL, answerBuffer[200];
          xGLXSingleReply reply = { 0, };
  
          if (do_swap) {
              target = (GLenum) bswap_32(*(int *) (pc + 0));
              pname = (GLenum) bswap_32(*(int *) (pc + 4));
          }
          else {
              target = *(GLenum *) (pc + 0);
              pname = *(GLuint *) (pc + 4);
          }
  
          /* The value of the GL_PROGRAM_LENGTH_ARB and GL_PROGRAM_LENGTH_NV
           * enumerants is the same.
           */
          get_programiv(target, GL_PROGRAM_LENGTH_ARB, &compsize);
  
          if (compsize != 0) {
              __GLX_GET_ANSWER_BUFFER(answer, cl, compsize, 1);
              __glXClearErrorOccured();
  
              get_program_string(target, pname, (GLubyte *) answer);
          }
  
          if (__glXErrorOccured()) {
              __GLX_BEGIN_REPLY(0);
              __GLX_SEND_HEADER();
          }
          else {
              __GLX_BEGIN_REPLY(compsize);
              ((xGLXGetTexImageReply *) &reply)->width = compsize;
              __GLX_SEND_HEADER();
              __GLX_SEND_VOID_ARRAY(compsize);
          }
  
          error = Success;
      }
  
      return error;
  }
  
  int
  __glXDisp_GetProgramStringARB(struct __GLXclientStateRec *cl, GLbyte * pc)
  {
      PFNGLGETPROGRAMIVARBPROC get_program =
          __glGetProcAddress("glGetProgramivARB");
      PFNGLGETPROGRAMSTRINGARBPROC get_program_string =
          __glGetProcAddress("glGetProgramStringARB");
  
      return DoGetProgramString(cl, pc, get_program, get_program_string, FALSE);
  }
  
  int
  __glXDispSwap_GetProgramStringARB(struct __GLXclientStateRec *cl, GLbyte * pc)
  {
      PFNGLGETPROGRAMIVARBPROC get_program =
          __glGetProcAddress("glGetProgramivARB");
      PFNGLGETPROGRAMSTRINGARBPROC get_program_string =
          __glGetProcAddress("glGetProgramStringARB");
  
      return DoGetProgramString(cl, pc, get_program, get_program_string, TRUE);
  }