xorg-server-1.4/hw/dmx/glxProxy/glxutil.c

   1 /*
   2 ** License Applicability. Except to the extent portions of this file are
   3 ** made subject to an alternative license as permitted in the SGI Free
   4 ** Software License B, Version 1.1 (the "License"), the contents of this
   5 ** file are subject only to the provisions of the License. You may not use
   6 ** this file except in compliance with the License. You may obtain a copy
   7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
   9 **
  10 ** http://oss.sgi.com/projects/FreeB
  11 **
  12 ** Note that, as provided in the License, the Software is distributed on an
  13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  17 **
  18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  21 ** Copyright in any portions created by third parties is as indicated
  22 ** elsewhere herein. All Rights Reserved.
  23 **
  24 ** Additional Notice Provisions: The application programming interfaces
  25 ** established by SGI in conjunction with the Original Code are The
  26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  31 ** published by SGI, but has not been independently verified as being
  32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  33 **
  34 */
  35
  36 #define NEED_REPLIES
  37 #define FONT_PCF
  38 #include "glxserver.h"
  39 #include <GL/glxtokens.h>
  40 #include <pixmapstr.h>
  41 #include <windowstr.h>
  42 #include "glxutil.h"
  43
  44 /************************************************************************/
  45
  46 void __glXNop(void) {}
  47
  48 /************************************************************************/
  49
  50 /* Memory Allocation for GLX */
  51
  52 void *
  53 __glXMalloc(size_t size)
  54 {
  55     void *addr;
  56
  57     if (size == 0) {
  58         return NULL;
  59     }
  60     addr = (void *) xalloc(size);
  61     if (addr == NULL) {
  62         /* XXX: handle out of memory error */
  63         return NULL;
  64     }
  65     return addr;
  66 }
  67
  68 void *
  69 __glXCalloc(size_t numElements, size_t elementSize)
  70 {
  71     void *addr;
  72     size_t size;
  73
  74     if ((numElements == 0) || (elementSize == 0)) {
  75         return NULL;
  76     }
  77     size = numElements * elementSize;
  78     addr = (void *) xalloc(size);
  79     if (addr == NULL) {
  80         /* XXX: handle out of memory error */
  81         return NULL;
  82     }
  83     memset(addr, 0, size);
  84     return addr;
  85 }
  86
  87 void *
  88 __glXRealloc(void *addr, size_t newSize)
  89 {
  90     void *newAddr;
  91
  92     if (addr) {
  93         if (newSize == 0) {
  94             xfree(addr);
  95             return NULL;
  96         } else {
  97             newAddr = xrealloc(addr, newSize);
  98         }
  99     } else {
 100         if (newSize == 0) {
 101             return NULL;
 102         } else {
 103             newAddr = xalloc(newSize);
 104         }
 105     }
 106     if (newAddr == NULL) {
 107         return NULL;    /* XXX: out of memory */
 108     }
 109
 110     return newAddr;
 111 }
 112
 113 void
 114 __glXFree(void *addr)
 115 {
 116     if (addr) {
 117         xfree(addr);
 118     }
 119 }