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

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• Author : matthieu
  Date : 2006-11-26 18:13:41
  Hash : 889b8606
  Message : Importing xserver from X.Org 7.2RC2

• xserver/GL/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>
   */
  
  #define NEED_REPLIES
  #ifdef HAVE_DIX_CONFIG_H
  #include <dix-config.h>
  #endif
  
  #include "glxserver.h"
  #include "glxext.h"
  #include "singlesize.h"
  #include "unpack.h"
  #include "indirect_size_get.h"
  #include "indirect_dispatch.h"
  #include "glapitable.h"
  #include "glapi.h"
  #include "glthread.h"
  #include "dispatch.h"
  #include "glapioffsets.h"
  
  #ifdef __linux__
  #include <byteswap.h>
  #elif defined(__OpenBSD__)
  #include <sys/endian.h>
  #define bswap_16 __swap16
  #define bswap_32 __swap32
  #define bswap_64 __swap64
  #else
  #include <sys/endian.h>
  #define bswap_16 bswap16
  #define bswap_32 bswap32
  #define bswap_64 bswap64
  #endif
  
  static int DoGetProgramString(struct __GLXclientStateRec *cl, GLbyte *pc,
      unsigned get_programiv_offset, unsigned get_program_string_offset,
      Bool do_swap);
  
  /**
   * Handle both types of glGetProgramString calls.
   *
   * This single function handles both \c glGetProgramStringARB and
   * \c glGetProgramStringNV.  The dispatch offsets for the functions to use
   * for \c glGetProgramivARB and \c glGetProgramStringARB are passed in by the
   * caller.  These can be the offsets of either the ARB versions or the NV
   * versions.
   */
  int DoGetProgramString(struct __GLXclientStateRec *cl, GLbyte *pc,
  		       unsigned get_programiv_offset,
  		       unsigned get_program_string_offset,
  		       Bool do_swap)
  {
      xGLXVendorPrivateWithReplyReq * const req = 
        (xGLXVendorPrivateWithReplyReq *) pc;
      int error;
      __GLXcontext * const cx = __glXForceCurrent(cl, req->contextTag, & error);
      ClientPtr client = cl->client;
  
  
      pc += __GLX_VENDPRIV_HDR_SIZE;
      if (cx != NULL) {
  	GLenum target;
  	GLenum pname;
  	GLint compsize = 0;
  	char *answer = NULL, answerBuffer[200];
  
  	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.
  	 */
  	CALL_by_offset(GET_DISPATCH(),
  		       (void (GLAPIENTRYP)(GLuint, GLenum, GLint *)), 
  		       get_programiv_offset,
  		       (target, GL_PROGRAM_LENGTH_ARB, &compsize));
  
  	if (compsize != 0) {
  	    __GLX_GET_ANSWER_BUFFER(answer,cl,compsize,1);
  	    __glXClearErrorOccured();
  
  	    CALL_by_offset(GET_DISPATCH(), 
  			   (void (GLAPIENTRYP)(GLuint, GLenum, GLubyte *)),
  			   get_program_string_offset,
  			   (target, pname, answer));
  	}
  
  	if (__glXErrorOccured()) {
  	    __GLX_BEGIN_REPLY(0);
  	    __GLX_SEND_HEADER();
  	} else {
  	    __GLX_BEGIN_REPLY(compsize);
  	    ((xGLXGetTexImageReply *)&__glXReply)->width = compsize;
  	    __GLX_SEND_HEADER();
  	    __GLX_SEND_VOID_ARRAY(compsize);
  	}
  
  	error = Success;
      }
  
      return error;
  }
  
  int __glXDisp_GetProgramStringARB(struct __GLXclientStateRec *cl, GLbyte *pc)
  {
      return DoGetProgramString(cl, pc, _gloffset_GetProgramivARB,
  			      _gloffset_GetProgramStringARB, False);
  }
  
  
  int __glXDispSwap_GetProgramStringARB(struct __GLXclientStateRec *cl, GLbyte *pc)
  {
      return DoGetProgramString(cl, pc, _gloffset_GetProgramivARB,
  			      _gloffset_GetProgramStringARB, True);
  }
  
  
  int __glXDisp_GetProgramStringNV(struct __GLXclientStateRec *cl, GLbyte *pc)
  {
      return DoGetProgramString(cl, pc, _gloffset_GetProgramivNV,
  			      _gloffset_GetProgramStringNV, False);
  }
  
  
  int __glXDispSwap_GetProgramStringNV(struct __GLXclientStateRec *cl, GLbyte *pc)
  {
      return DoGetProgramString(cl, pc, _gloffset_GetProgramivNV,
  			      _gloffset_GetProgramStringNV, True);
  }