src/gallium/state_trackers/wgl/stw_ext_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.11
   4  *
   5  * Copyright (C) 2011 Morgan Armand <morgan.devel@gmail.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <windows.h>
  27
  28 #define WGL_WGLEXT_PROTOTYPES
  29
  30 #include <GL/gl.h>
  31 #include <GL/wglext.h>
  32
  33 #include "stw_icd.h"
  34 #include "stw_context.h"
  35
  36 HGLRC WINAPI
  37 wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext, const int *attribList)
  38 {
  39    int majorVersion = 1, minorVersion = 0, layerPlane = 0;
  40    int contextFlags = 0x0;
  41    int profileMask = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
  42    int i;
  43    BOOL done = FALSE;
  44
  45    /* parse attrib_list */
  46    if (attribList) {
  47       for (i = 0; !done && attribList[i]; i++) {
  48          switch (attribList[i]) {
  49          case WGL_CONTEXT_MAJOR_VERSION_ARB:
  50             majorVersion = attribList[++i];
  51             break;
  52          case WGL_CONTEXT_MINOR_VERSION_ARB:
  53             minorVersion = attribList[++i];
  54             break;
  55          case WGL_CONTEXT_LAYER_PLANE_ARB:
  56             layerPlane = attribList[++i];
  57             break;
  58          case WGL_CONTEXT_FLAGS_ARB:
  59             contextFlags = attribList[++i];
  60             break;
  61          case WGL_CONTEXT_PROFILE_MASK_ARB:
  62             profileMask = attribList[++i];
  63             break;
  64          case 0:
  65             /* end of list */
  66             done = TRUE;
  67             break;
  68          default:
  69             /* bad attribute */
  70             SetLastError(ERROR_INVALID_PARAMETER);
  71             return NULL;
  72          }
  73       }
  74    }
  75
  76    /* check version (generate ERROR_INVALID_VERSION_ARB if bad) */
  77    switch (majorVersion) {
  78    case 1:
  79       if (minorVersion < 0 || minorVersion > 5) {
  80          SetLastError(ERROR_INVALID_VERSION_ARB);
  81          return NULL;
  82       }
  83       break;
  84    case 2:
  85       if (minorVersion < 0 || minorVersion > 1) {
  86          SetLastError(ERROR_INVALID_VERSION_ARB);
  87          return NULL;
  88       }
  89       break;
  90    case 3:
  91       if (minorVersion < 0 || minorVersion > 3) {
  92          SetLastError(ERROR_INVALID_VERSION_ARB);
  93          return NULL;
  94       }
  95       break;
  96    case 4:
  97       if (minorVersion < 0 || minorVersion > 2) {
  98          SetLastError(ERROR_INVALID_VERSION_ARB);
  99          return NULL;
 100       }
 101       break;
 102    default:
 103       return NULL;
 104    }
 105
 106    if ((contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
 107        majorVersion < 3) {
 108       SetLastError(ERROR_INVALID_VERSION_ARB);
 109       return NULL;
 110    }
 111
 112    /* check profileMask */
 113    if (profileMask != WGL_CONTEXT_CORE_PROFILE_BIT_ARB &&
 114        profileMask != WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) {
 115       SetLastError(ERROR_INVALID_PROFILE_ARB);
 116       return NULL;
 117    }
 118
 119    return (HGLRC) stw_create_context_attribs(hDC, layerPlane,
 120                                              (DHGLRC) (UINT_PTR) hShareContext,
 121                                              majorVersion, minorVersion,
 122                                              contextFlags, profileMask);
 123 }