annotate src/video/wincommon/SDL_wingl.c @ 450:8a43e0cbf02f

Added SDL_GL_STEREO for stereoscopic OpenGL contexts
author Sam Lantinga <slouken@libsdl.org>
date Mon, 19 Aug 2002 17:58:08 +0000
parents c638fde8a824
children a6fa62b1be09
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* WGL implementation of SDL OpenGL support */
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29
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13fc64213765 *** empty log message ***
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30 #include "SDL_opengl.h"
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31 #include "SDL_error.h"
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32 #include "SDL_lowvideo.h"
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33 #include "SDL_wingl_c.h"
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34
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35 #ifdef HAVE_OPENGL
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36 #define DEFAULT_GL_DRIVER_PATH "OPENGL32.DLL"
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37 #endif
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38
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39 /* If setting the HDC fails, we may need to recreate the window (MSDN) */
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40 static int WIN_GL_ResetWindow(_THIS)
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41 {
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42 int status = 0;
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43 int can_reset = 1;
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44
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45 /* If we were passed a window, then we can't create a new one */
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46 if ( SDL_windowid ) {
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47 can_reset = 0;
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48 }
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49 #ifndef _WIN32_WCE /* FIXME WinCE needs the UNICODE version of CreateWindow() */
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50 if ( can_reset ) {
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51 /* Save the existing window attributes */
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52 LONG style;
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53 RECT rect = { 0, 0, 0, 0 };
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54 style = GetWindowLong(SDL_Window, GWL_STYLE);
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55 GetWindowRect(SDL_Window, &rect);
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56 DestroyWindow(SDL_Window);
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57 SDL_Window = CreateWindow(SDL_Appname, SDL_Appname,
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58 style,
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59 rect.left, rect.top,
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60 (rect.right-rect.left)+1,
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61 (rect.top-rect.bottom)+1,
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62 NULL, NULL, SDL_Instance, NULL);
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63 if ( SDL_Window ) {
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64 this->SetCaption(this, this->wm_title, this->wm_icon);
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65 } else {
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66 SDL_SetError("Couldn't create window");
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67 status = -1;
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68 }
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69 } else
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70 #endif /* !_WIN32_WCE */
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71 {
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72 SDL_SetError("Unable to reset window for OpenGL context");
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73 status = -1;
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74 }
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75 return(status);
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76 }
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77
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78 int WIN_GL_SetupWindow(_THIS)
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79 {
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80 int retval;
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81 #ifdef HAVE_OPENGL
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82 int i;
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83 int pixel_format;
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84
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85 /* load the gl driver from a default path */
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86 if ( ! this->gl_config.driver_loaded ) {
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87 /* no driver has been loaded, use default (ourselves) */
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88 if ( WIN_GL_LoadLibrary(this, NULL) < 0 ) {
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89 return(-1);
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90 }
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91 }
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92
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93 for ( i=0; ; ++i ) {
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94 /* Get the window device context for our OpenGL drawing */
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95 GL_hdc = GetDC(SDL_Window);
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96 if ( GL_hdc == NULL ) {
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97 SDL_SetError("Unable to get DC for SDL_Window");
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98 return(-1);
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99 }
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100
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101 /* Set up the pixel format descriptor with our needed format */
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102 memset(&GL_pfd, 0, sizeof(GL_pfd));
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103 GL_pfd.nSize = sizeof(GL_pfd);
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104 GL_pfd.nVersion = 1;
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105 GL_pfd.dwFlags = (PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL);
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106 if ( this->gl_config.double_buffer ) {
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107 GL_pfd.dwFlags |= PFD_DOUBLEBUFFER;
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108 }
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109 if ( this->gl_config.stereo ) {
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110 GL_pfd.dwFlags |= PFD_STEREO;
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111 }
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112 GL_pfd.iPixelType = PFD_TYPE_RGBA;
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113 GL_pfd.cColorBits = this->gl_config.buffer_size;
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114 GL_pfd.cRedBits = this->gl_config.red_size;
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115 GL_pfd.cGreenBits = this->gl_config.green_size;
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116 GL_pfd.cBlueBits = this->gl_config.blue_size;
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117 GL_pfd.cAlphaBits = this->gl_config.alpha_size;
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118 GL_pfd.cAccumRedBits = this->gl_config.accum_red_size;
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119 GL_pfd.cAccumGreenBits = this->gl_config.accum_green_size;
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120 GL_pfd.cAccumBlueBits = this->gl_config.accum_blue_size;
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121 GL_pfd.cAccumAlphaBits = this->gl_config.accum_alpha_size;
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122 GL_pfd.cAccumBits =
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123 (GL_pfd.cAccumRedBits + GL_pfd.cAccumGreenBits +
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124 GL_pfd.cAccumBlueBits + GL_pfd.cAccumAlphaBits);
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125 GL_pfd.cDepthBits = this->gl_config.depth_size;
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126 GL_pfd.cStencilBits = this->gl_config.stencil_size;
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127
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128 /* Choose and set the closest available pixel format */
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129 pixel_format = ChoosePixelFormat(GL_hdc, &GL_pfd);
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130 if ( !pixel_format ) {
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131 SDL_SetError("No matching GL pixel format available");
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132 return(-1);
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133 }
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134 if( !SetPixelFormat(GL_hdc, pixel_format, &GL_pfd) ) {
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135 if ( i == 0 ) {
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136 /* First time through, try resetting the window */
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137 if ( WIN_GL_ResetWindow(this) < 0 ) {
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138 return(-1);
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139 }
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140 continue;
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141 }
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142 SDL_SetError("Unable to set HDC pixel format");
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143 return(-1);
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144 }
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145 /* We either succeeded or failed by this point */
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146 break;
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147 }
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148 DescribePixelFormat(GL_hdc, pixel_format, sizeof(GL_pfd), &GL_pfd);
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parents:
diff changeset
149
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parents:
diff changeset
150 GL_hrc = this->gl_data->wglCreateContext(GL_hdc);
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parents:
diff changeset
151 if( GL_hrc == NULL ) {
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parents:
diff changeset
152 SDL_SetError("Unable to create GL context");
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parents:
diff changeset
153 return(-1);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
154 }
74212992fb08 Initial revision
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parents:
diff changeset
155 gl_active = 1;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
156 #else
74212992fb08 Initial revision
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parents:
diff changeset
157 SDL_SetError("WIN driver not configured with OpenGL");
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parents:
diff changeset
158 #endif
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parents:
diff changeset
159 if ( gl_active ) {
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parents:
diff changeset
160 retval = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
161 } else {
74212992fb08 Initial revision
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parents:
diff changeset
162 retval = -1;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
163 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
164 return(retval);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
165 }
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parents:
diff changeset
166
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parents:
diff changeset
167 void WIN_GL_ShutDown(_THIS)
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parents:
diff changeset
168 {
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parents:
diff changeset
169 #ifdef HAVE_OPENGL
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parents:
diff changeset
170 /* Clean up OpenGL */
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parents:
diff changeset
171 if ( GL_hrc ) {
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parents:
diff changeset
172 this->gl_data->wglMakeCurrent(NULL, NULL);
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parents:
diff changeset
173 this->gl_data->wglDeleteContext(GL_hrc);
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parents:
diff changeset
174 GL_hrc = NULL;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
175 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
176 if ( GL_hdc ) {
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parents:
diff changeset
177 ReleaseDC(SDL_Window, GL_hdc);
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parents:
diff changeset
178 GL_hdc = NULL;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
179 }
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parents:
diff changeset
180 gl_active = 0;
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parents:
diff changeset
181
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parents:
diff changeset
182 WIN_GL_UnloadLibrary(this);
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parents:
diff changeset
183 #endif /* HAVE_OPENGL */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
184 }
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parents:
diff changeset
185
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parents:
diff changeset
186 #ifdef HAVE_OPENGL
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parents:
diff changeset
187
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parents:
diff changeset
188 /* Make the current context active */
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parents:
diff changeset
189 int WIN_GL_MakeCurrent(_THIS)
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parents:
diff changeset
190 {
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parents:
diff changeset
191 int retval;
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parents:
diff changeset
192
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parents:
diff changeset
193 retval = 0;
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parents:
diff changeset
194 if ( ! this->gl_data->wglMakeCurrent(GL_hdc, GL_hrc) ) {
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parents:
diff changeset
195 SDL_SetError("Unable to make GL context current");
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parents:
diff changeset
196 retval = -1;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
197 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
198 return(retval);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
199 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
200
74212992fb08 Initial revision
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parents:
diff changeset
201 /* Get attribute data from glX. */
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parents:
diff changeset
202 int WIN_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203 {
74212992fb08 Initial revision
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parents:
diff changeset
204 int retval;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
206 retval = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 switch( attrib ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
208 case SDL_GL_RED_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
209 *value = GL_pfd.cRedBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211 case SDL_GL_GREEN_SIZE:
74212992fb08 Initial revision
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parents:
diff changeset
212 *value = GL_pfd.cGreenBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
214 case SDL_GL_BLUE_SIZE:
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parents:
diff changeset
215 *value = GL_pfd.cBlueBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
216 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
217 case SDL_GL_ALPHA_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218 *value = GL_pfd.cAlphaBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
219 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
220 case SDL_GL_DOUBLEBUFFER:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
221 if ( GL_pfd.dwFlags & PFD_DOUBLEBUFFER ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222 *value = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
223 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
224 *value = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
225 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
226 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
227 case SDL_GL_BUFFER_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
228 *value = GL_pfd.cColorBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
229 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
230 case SDL_GL_DEPTH_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
231 *value = GL_pfd.cDepthBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
233 case SDL_GL_STENCIL_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
234 *value = GL_pfd.cStencilBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
235 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
236 case SDL_GL_ACCUM_RED_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
237 *value = GL_pfd.cAccumRedBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239 case SDL_GL_ACCUM_GREEN_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
240 *value = GL_pfd.cAccumGreenBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
241 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
242 case SDL_GL_ACCUM_BLUE_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
243 *value = GL_pfd.cAccumBlueBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
244 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 case SDL_GL_ACCUM_ALPHA_SIZE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
246 *value = GL_pfd.cAccumAlphaBits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
247 break;
450
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
248 case SDL_GL_STEREO:
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
249 if ( GL_pfd.dwFlags & PFD_STEREO ) {
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
250 *value = 1;
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
251 } else {
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
252 *value = 0;
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
253 }
8a43e0cbf02f Added SDL_GL_STEREO for stereoscopic OpenGL contexts
Sam Lantinga <slouken@libsdl.org>
parents: 373
diff changeset
254 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
255 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 retval = -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
257 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
259 return retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
261
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
262 void WIN_GL_SwapBuffers(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
263 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
264 SwapBuffers(GL_hdc);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
265 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
266
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
267 #endif /* HAVE_OPENGL */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 #ifdef HAVE_OPENGL
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
270
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271 void WIN_GL_UnloadLibrary(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
272 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
273 if ( this->gl_config.driver_loaded ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
274 FreeLibrary((HMODULE)this->gl_config.dll_handle);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
275
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
276 this->gl_data->wglGetProcAddress = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
277 this->gl_data->wglCreateContext = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
278 this->gl_data->wglDeleteContext = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279 this->gl_data->wglMakeCurrent = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 this->gl_config.dll_handle = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282 this->gl_config.driver_loaded = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 /* Passing a NULL path means load pointers from the application */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 int WIN_GL_LoadLibrary(_THIS, const char* path)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 HMODULE handle;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 if ( gl_active ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 SDL_SetError("OpenGL context already created");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293 return -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296 if ( path == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 path = DEFAULT_GL_DRIVER_PATH;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299 handle = LoadLibrary(path);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 if ( handle == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 SDL_SetError("Could not load OpenGL library");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 return -1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305 /* Unload the old driver and reset the pointers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 WIN_GL_UnloadLibrary(this);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 /* Load new function pointers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 this->gl_data->wglGetProcAddress = (void * (WINAPI *)(const char *))
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310 GetProcAddress(handle, "wglGetProcAddress");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 this->gl_data->wglCreateContext = (HGLRC (WINAPI *)(HDC))
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312 GetProcAddress(handle, "wglCreateContext");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313 this->gl_data->wglDeleteContext = (BOOL (WINAPI *)(HGLRC))
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314 GetProcAddress(handle, "wglDeleteContext");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315 this->gl_data->wglMakeCurrent = (BOOL (WINAPI *)(HDC, HGLRC))
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 GetProcAddress(handle, "wglMakeCurrent");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 if ( (this->gl_data->wglGetProcAddress == NULL) ||
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
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319 (this->gl_data->wglCreateContext == NULL) ||
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320 (this->gl_data->wglDeleteContext == NULL) ||
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321 (this->gl_data->wglMakeCurrent == NULL) ) {
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322 SDL_SetError("Could not retrieve OpenGL functions");
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323 FreeLibrary(handle);
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324 return -1;
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325 }
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326
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327 this->gl_config.dll_handle = handle;
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328 strcpy(this->gl_config.driver_path, path);
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329 this->gl_config.driver_loaded = 1;
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330 return 0;
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331 }
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332
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333 void *WIN_GL_GetProcAddress(_THIS, const char* proc)
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334 {
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335 void *func;
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336
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337 /* This is to pick up extensions */
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338 func = this->gl_data->wglGetProcAddress(proc);
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339 if ( ! func ) {
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340 /* This is probably a normal GL function */
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341 func = GetProcAddress(this->gl_config.dll_handle, proc);
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342 }
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343 return func;
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344 }
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345
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346 #endif /* HAVE_OPENGL */