Mercurial > sdl-ios-xcode
annotate src/video/wincommon/SDL_wingl.c @ 721:ab0656314eef
Date: Thu, 18 Sep 2003 14:24:35 -0400
From: Scott Watson
Subject: [SDL] Improper Windows message routine calling
If this hasn't been caught yet, there's an improper method of calling a
user's window message routine in the various SDL_xxevents.c files.
Calling it improperly can cause a crash under at least XP.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 21 Sep 2003 18:40:51 +0000 |
parents | 92a933bf2f0f |
children | ed57c876700d |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
6 modify it under the terms of the GNU Library General Public | |
7 License as published by the Free Software Foundation; either | |
8 version 2 of the License, or (at your option) any later version. | |
9 | |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 Library General Public License for more details. | |
14 | |
15 You should have received a copy of the GNU Library General Public | |
16 License along with this library; if not, write to the Free | |
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
22 | |
23 #ifdef SAVE_RCSID | |
24 static char rcsid = | |
25 "@(#) $Id$"; | |
26 #endif | |
27 | |
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28 #include <string.h> |
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29 |
0 | 30 /* WGL implementation of SDL OpenGL support */ |
31 | |
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32 #ifdef HAVE_OPENGL |
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33 #include "SDL_opengl.h" |
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34 #endif |
0 | 35 #include "SDL_error.h" |
36 #include "SDL_lowvideo.h" | |
37 #include "SDL_wingl_c.h" | |
38 | |
39 #ifdef HAVE_OPENGL | |
40 #define DEFAULT_GL_DRIVER_PATH "OPENGL32.DLL" | |
41 #endif | |
42 | |
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43 /* If setting the HDC fails, we may need to recreate the window (MSDN) */ |
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44 static int WIN_GL_ResetWindow(_THIS) |
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45 { |
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46 int status = 0; |
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47 int can_reset = 1; |
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48 |
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49 /* If we were passed a window, then we can't create a new one */ |
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50 if ( SDL_windowid ) { |
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51 can_reset = 0; |
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52 } |
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53 #ifndef _WIN32_WCE /* FIXME WinCE needs the UNICODE version of CreateWindow() */ |
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54 if ( can_reset ) { |
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55 /* Save the existing window attributes */ |
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56 LONG style; |
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57 RECT rect = { 0, 0, 0, 0 }; |
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58 style = GetWindowLong(SDL_Window, GWL_STYLE); |
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59 GetWindowRect(SDL_Window, &rect); |
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60 DestroyWindow(SDL_Window); |
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61 SDL_Window = CreateWindow(SDL_Appname, SDL_Appname, |
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62 style, |
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63 rect.left, rect.top, |
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64 (rect.right-rect.left)+1, |
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65 (rect.top-rect.bottom)+1, |
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66 NULL, NULL, SDL_Instance, NULL); |
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67 if ( SDL_Window ) { |
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68 this->SetCaption(this, this->wm_title, this->wm_icon); |
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69 } else { |
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70 SDL_SetError("Couldn't create window"); |
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71 status = -1; |
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72 } |
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73 } else |
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74 #endif /* !_WIN32_WCE */ |
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75 { |
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76 SDL_SetError("Unable to reset window for OpenGL context"); |
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77 status = -1; |
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78 } |
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79 return(status); |
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80 } |
0 | 81 |
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82 static void Init_WGL_ARB_extensions(_THIS) |
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83 { |
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84 HWND hwnd; |
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85 HDC hdc; |
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86 HGLRC hglrc; |
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87 int pformat; |
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88 const char * (WINAPI *wglGetExtensionsStringARB)(HDC) = 0; |
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89 |
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90 hwnd = CreateWindow(SDL_Appname, SDL_Appname, WS_POPUP | WS_DISABLED, |
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91 0, 0, 10, 10, |
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92 NULL, NULL, SDL_Instance,NULL); |
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93 hdc = GetDC(hwnd); |
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94 |
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95 pformat = ChoosePixelFormat(hdc, &GL_pfd); |
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96 SetPixelFormat(hdc, pformat, &GL_pfd); |
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97 |
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98 hglrc = this->gl_data->wglCreateContext(hdc); |
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99 if ( hglrc ) { |
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100 this->gl_data->wglMakeCurrent(hdc, hglrc); |
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101 } |
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102 |
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103 wglGetExtensionsStringARB = (const char * (WINAPI *)(HDC)) |
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104 this->gl_data->wglGetProcAddress("wglGetExtensionsStringARB"); |
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105 |
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106 if(wglGetExtensionsStringARB && strstr(wglGetExtensionsStringARB(hdc),"WGL_ARB_pixel_format")) { |
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107 this->gl_data->wglChoosePixelFormatARB = |
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108 (BOOL (WINAPI *)(HDC, const int *, const FLOAT *, UINT, int *, UINT *)) |
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109 this->gl_data->wglGetProcAddress("wglChoosePixelFormatARB"); |
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110 this->gl_data->wglGetPixelFormatAttribivARB = |
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111 (BOOL (WINAPI *)(HDC, int, int, UINT, const int *, int *)) |
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112 this->gl_data->wglGetProcAddress("wglGetPixelFormatAttribivARB"); |
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113 |
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114 if( (this->gl_data->wglChoosePixelFormatARB != NULL) && |
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115 (this->gl_data->wglGetPixelFormatAttribivARB != NULL) ) |
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116 this->gl_data->wgl_arb_pixel_format = 1; |
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117 else |
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118 this->gl_data->wgl_arb_pixel_format = 0; |
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119 } else { |
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120 this->gl_data->wgl_arb_pixel_format = 0; |
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121 } |
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122 |
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123 if ( hglrc ) { |
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124 this->gl_data->wglMakeCurrent(NULL, NULL); |
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125 this->gl_data->wglDeleteContext(hglrc); |
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126 } |
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127 ReleaseDC(hwnd, hdc); |
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128 DestroyWindow(hwnd); |
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129 } |
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130 |
0 | 131 int WIN_GL_SetupWindow(_THIS) |
132 { | |
133 int retval; | |
134 #ifdef HAVE_OPENGL | |
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135 int i; |
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136 unsigned int matching; |
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137 int iAttribs[64]; |
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138 int *iAttr; |
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139 float fAttribs[1] = { 0 }; |
0 | 140 |
141 /* load the gl driver from a default path */ | |
142 if ( ! this->gl_config.driver_loaded ) { | |
143 /* no driver has been loaded, use default (ourselves) */ | |
144 if ( WIN_GL_LoadLibrary(this, NULL) < 0 ) { | |
145 return(-1); | |
146 } | |
147 } | |
148 | |
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149 for ( i=0; ; ++i ) { |
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150 /* Get the window device context for our OpenGL drawing */ |
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151 GL_hdc = GetDC(SDL_Window); |
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152 if ( GL_hdc == NULL ) { |
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153 SDL_SetError("Unable to get DC for SDL_Window"); |
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154 return(-1); |
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155 } |
0 | 156 |
373
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157 /* Set up the pixel format descriptor with our needed format */ |
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158 memset(&GL_pfd, 0, sizeof(GL_pfd)); |
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159 GL_pfd.nSize = sizeof(GL_pfd); |
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160 GL_pfd.nVersion = 1; |
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161 GL_pfd.dwFlags = (PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL); |
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162 if ( this->gl_config.double_buffer ) { |
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163 GL_pfd.dwFlags |= PFD_DOUBLEBUFFER; |
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164 } |
450
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165 if ( this->gl_config.stereo ) { |
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166 GL_pfd.dwFlags |= PFD_STEREO; |
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167 } |
373
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168 GL_pfd.iPixelType = PFD_TYPE_RGBA; |
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169 GL_pfd.cColorBits = this->gl_config.buffer_size; |
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170 GL_pfd.cRedBits = this->gl_config.red_size; |
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171 GL_pfd.cGreenBits = this->gl_config.green_size; |
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172 GL_pfd.cBlueBits = this->gl_config.blue_size; |
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173 GL_pfd.cAlphaBits = this->gl_config.alpha_size; |
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174 GL_pfd.cAccumRedBits = this->gl_config.accum_red_size; |
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175 GL_pfd.cAccumGreenBits = this->gl_config.accum_green_size; |
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176 GL_pfd.cAccumBlueBits = this->gl_config.accum_blue_size; |
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177 GL_pfd.cAccumAlphaBits = this->gl_config.accum_alpha_size; |
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178 GL_pfd.cAccumBits = |
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179 (GL_pfd.cAccumRedBits + GL_pfd.cAccumGreenBits + |
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180 GL_pfd.cAccumBlueBits + GL_pfd.cAccumAlphaBits); |
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181 GL_pfd.cDepthBits = this->gl_config.depth_size; |
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182 GL_pfd.cStencilBits = this->gl_config.stencil_size; |
0 | 183 |
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184 /* initialize WGL_ARB_pixel_format */ |
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185 Init_WGL_ARB_extensions(this); |
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186 |
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187 /* setup WGL_ARB_pixel_format attribs */ |
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188 iAttr = &iAttribs[0]; |
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189 |
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190 *iAttr++ = WGL_DRAW_TO_WINDOW_ARB; |
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191 *iAttr++ = GL_TRUE; |
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192 *iAttr++ = WGL_ACCELERATION_ARB; |
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193 *iAttr++ = WGL_FULL_ACCELERATION_ARB; |
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194 *iAttr++ = WGL_RED_BITS_ARB; |
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195 *iAttr++ = this->gl_config.red_size; |
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196 *iAttr++ = WGL_GREEN_BITS_ARB; |
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197 *iAttr++ = this->gl_config.green_size; |
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198 *iAttr++ = WGL_BLUE_BITS_ARB; |
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199 *iAttr++ = this->gl_config.blue_size; |
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200 |
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201 if ( this->gl_config.alpha_size ) { |
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202 *iAttr++ = WGL_ALPHA_BITS_ARB; |
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203 *iAttr++ = this->gl_config.alpha_size; |
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204 } |
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205 |
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206 if ( this->gl_config.double_buffer ) { |
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207 *iAttr ++ = WGL_DOUBLE_BUFFER_ARB; |
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208 *iAttr ++ = GL_TRUE; |
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209 } |
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210 |
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211 *iAttr++ = WGL_DEPTH_BITS_ARB; |
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212 *iAttr++ = this->gl_config.depth_size; |
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213 |
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214 if ( this->gl_config.stencil_size ) { |
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215 *iAttr++ = WGL_STENCIL_BITS_ARB; |
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216 *iAttr++ = this->gl_config.stencil_size; |
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217 } |
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218 |
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219 if ( this->gl_config.accum_red_size ) { |
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220 *iAttr++ = WGL_ACCUM_RED_BITS_ARB; |
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221 *iAttr++ = this->gl_config.accum_red_size; |
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222 } |
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223 |
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224 if ( this->gl_config.accum_green_size ) { |
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225 *iAttr++ = WGL_ACCUM_GREEN_BITS_ARB; |
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226 *iAttr++ = this->gl_config.accum_green_size; |
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227 } |
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228 |
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229 if ( this->gl_config.accum_blue_size ) { |
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230 *iAttr++ = WGL_ACCUM_BLUE_BITS_ARB; |
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231 *iAttr++ = this->gl_config.accum_blue_size; |
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232 } |
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233 |
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234 if ( this->gl_config.accum_alpha_size ) { |
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235 *iAttr++ = WGL_ACCUM_ALPHA_BITS_ARB; |
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236 *iAttr++ = this->gl_config.accum_alpha_size; |
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237 } |
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238 |
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239 if ( this->gl_config.stereo ) { |
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240 *iAttr++ = WGL_STEREO_ARB; |
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241 *iAttr++ = this->gl_config.stereo; |
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242 } |
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243 |
656
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Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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244 if ( this->gl_config.multisamplebuffers ) { |
655
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245 *iAttr++ = WGL_SAMPLE_BUFFERS_ARB; |
656
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246 *iAttr++ = this->gl_config.multisamplebuffers; |
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247 } |
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248 |
656
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Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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249 if ( this->gl_config.multisamplesamples ) { |
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250 *iAttr++ = WGL_SAMPLES_ARB; |
656
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251 *iAttr++ = this->gl_config.multisamplesamples; |
655
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252 } |
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253 |
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254 *iAttr = 0; |
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255 |
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256 /* Choose and set the closest available pixel format */ |
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257 if ( !this->gl_data->wgl_arb_pixel_format || |
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258 !this->gl_data->wglChoosePixelFormatARB(GL_hdc, iAttribs, fAttribs, 1, &pixel_format, &matching) || |
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259 !matching ) { |
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260 pixel_format = ChoosePixelFormat(GL_hdc, &GL_pfd); |
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261 this->gl_data->wgl_arb_pixel_format = 0; |
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262 } |
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263 if ( !pixel_format ) { |
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264 SDL_SetError("No matching GL pixel format available"); |
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265 return(-1); |
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266 } |
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267 if ( !SetPixelFormat(GL_hdc, pixel_format, &GL_pfd) ) { |
373
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268 if ( i == 0 ) { |
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269 /* First time through, try resetting the window */ |
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270 if ( WIN_GL_ResetWindow(this) < 0 ) { |
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271 return(-1); |
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272 } |
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273 continue; |
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274 } |
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275 SDL_SetError("Unable to set HDC pixel format"); |
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276 return(-1); |
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277 } |
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278 /* We either succeeded or failed by this point */ |
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279 break; |
0 | 280 } |
281 DescribePixelFormat(GL_hdc, pixel_format, sizeof(GL_pfd), &GL_pfd); | |
282 | |
283 GL_hrc = this->gl_data->wglCreateContext(GL_hdc); | |
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284 if ( GL_hrc == NULL ) { |
0 | 285 SDL_SetError("Unable to create GL context"); |
286 return(-1); | |
287 } | |
288 gl_active = 1; | |
289 #else | |
290 SDL_SetError("WIN driver not configured with OpenGL"); | |
291 #endif | |
292 if ( gl_active ) { | |
293 retval = 0; | |
294 } else { | |
295 retval = -1; | |
296 } | |
297 return(retval); | |
298 } | |
299 | |
300 void WIN_GL_ShutDown(_THIS) | |
301 { | |
302 #ifdef HAVE_OPENGL | |
303 /* Clean up OpenGL */ | |
304 if ( GL_hrc ) { | |
305 this->gl_data->wglMakeCurrent(NULL, NULL); | |
306 this->gl_data->wglDeleteContext(GL_hrc); | |
307 GL_hrc = NULL; | |
308 } | |
309 if ( GL_hdc ) { | |
310 ReleaseDC(SDL_Window, GL_hdc); | |
311 GL_hdc = NULL; | |
312 } | |
313 gl_active = 0; | |
314 | |
315 WIN_GL_UnloadLibrary(this); | |
316 #endif /* HAVE_OPENGL */ | |
317 } | |
318 | |
319 #ifdef HAVE_OPENGL | |
320 | |
321 /* Make the current context active */ | |
322 int WIN_GL_MakeCurrent(_THIS) | |
323 { | |
324 int retval; | |
325 | |
326 retval = 0; | |
327 if ( ! this->gl_data->wglMakeCurrent(GL_hdc, GL_hrc) ) { | |
328 SDL_SetError("Unable to make GL context current"); | |
329 retval = -1; | |
330 } | |
331 return(retval); | |
332 } | |
333 | |
334 /* Get attribute data from glX. */ | |
335 int WIN_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) | |
336 { | |
337 int retval; | |
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338 |
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339 if ( this->gl_data->wgl_arb_pixel_format ) { |
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340 int wgl_attrib; |
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341 |
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342 switch(attrib) { |
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343 case SDL_GL_RED_SIZE: |
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344 wgl_attrib = WGL_RED_BITS_ARB; |
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345 break; |
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346 case SDL_GL_GREEN_SIZE: |
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347 wgl_attrib = WGL_GREEN_BITS_ARB; |
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348 break; |
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349 case SDL_GL_BLUE_SIZE: |
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350 wgl_attrib = WGL_BLUE_BITS_ARB; |
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351 break; |
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352 case SDL_GL_ALPHA_SIZE: |
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353 wgl_attrib = WGL_ALPHA_BITS_ARB; |
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354 break; |
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355 case SDL_GL_DOUBLEBUFFER: |
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356 wgl_attrib = WGL_DOUBLE_BUFFER_ARB; |
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357 break; |
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358 case SDL_GL_BUFFER_SIZE: |
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359 wgl_attrib = WGL_COLOR_BITS_ARB; |
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360 break; |
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361 case SDL_GL_DEPTH_SIZE: |
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362 wgl_attrib = WGL_DEPTH_BITS_ARB; |
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363 break; |
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364 case SDL_GL_STENCIL_SIZE: |
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365 wgl_attrib = WGL_STENCIL_BITS_ARB; |
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366 break; |
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367 case SDL_GL_ACCUM_RED_SIZE: |
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368 wgl_attrib = WGL_ACCUM_RED_BITS_ARB; |
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369 break; |
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370 case SDL_GL_ACCUM_GREEN_SIZE: |
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371 wgl_attrib = WGL_ACCUM_GREEN_BITS_ARB; |
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372 break; |
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373 case SDL_GL_ACCUM_BLUE_SIZE: |
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374 wgl_attrib = WGL_ACCUM_BLUE_BITS_ARB; |
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375 break; |
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376 case SDL_GL_ACCUM_ALPHA_SIZE: |
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377 wgl_attrib = WGL_ACCUM_ALPHA_BITS_ARB; |
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378 break; |
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379 case SDL_GL_STEREO: |
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380 wgl_attrib = WGL_STEREO_ARB; |
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381 break; |
656
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Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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382 case SDL_GL_MULTISAMPLEBUFFERS: |
655
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383 wgl_attrib = WGL_SAMPLE_BUFFERS_ARB; |
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384 break; |
656
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Merged in Ryan's multisample code for MacOS, and changed the constants to match.
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385 case SDL_GL_MULTISAMPLESAMPLES: |
655
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386 wgl_attrib = WGL_SAMPLES_ARB; |
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387 break; |
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388 default: |
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389 return(-1); |
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390 } |
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391 this->gl_data->wglGetPixelFormatAttribivARB(GL_hdc, pixel_format, 0, 1, &wgl_attrib, value); |
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392 |
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393 return 0; |
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394 } |
0 | 395 |
396 retval = 0; | |
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397 switch ( attrib ) { |
0 | 398 case SDL_GL_RED_SIZE: |
399 *value = GL_pfd.cRedBits; | |
400 break; | |
401 case SDL_GL_GREEN_SIZE: | |
402 *value = GL_pfd.cGreenBits; | |
403 break; | |
404 case SDL_GL_BLUE_SIZE: | |
405 *value = GL_pfd.cBlueBits; | |
406 break; | |
407 case SDL_GL_ALPHA_SIZE: | |
408 *value = GL_pfd.cAlphaBits; | |
409 break; | |
410 case SDL_GL_DOUBLEBUFFER: | |
411 if ( GL_pfd.dwFlags & PFD_DOUBLEBUFFER ) { | |
412 *value = 1; | |
413 } else { | |
414 *value = 0; | |
415 } | |
416 break; | |
417 case SDL_GL_BUFFER_SIZE: | |
418 *value = GL_pfd.cColorBits; | |
419 break; | |
420 case SDL_GL_DEPTH_SIZE: | |
421 *value = GL_pfd.cDepthBits; | |
422 break; | |
423 case SDL_GL_STENCIL_SIZE: | |
424 *value = GL_pfd.cStencilBits; | |
425 break; | |
426 case SDL_GL_ACCUM_RED_SIZE: | |
427 *value = GL_pfd.cAccumRedBits; | |
428 break; | |
429 case SDL_GL_ACCUM_GREEN_SIZE: | |
430 *value = GL_pfd.cAccumGreenBits; | |
431 break; | |
432 case SDL_GL_ACCUM_BLUE_SIZE: | |
433 *value = GL_pfd.cAccumBlueBits; | |
434 break; | |
435 case SDL_GL_ACCUM_ALPHA_SIZE: | |
436 *value = GL_pfd.cAccumAlphaBits; | |
437 break; | |
450
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Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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438 case SDL_GL_STEREO: |
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439 if ( GL_pfd.dwFlags & PFD_STEREO ) { |
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Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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440 *value = 1; |
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Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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441 } else { |
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Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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442 *value = 0; |
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Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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443 } |
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Added SDL_GL_STEREO for stereoscopic OpenGL contexts
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444 break; |
0 | 445 default: |
446 retval = -1; | |
447 break; | |
448 } | |
449 return retval; | |
450 } | |
451 | |
452 void WIN_GL_SwapBuffers(_THIS) | |
453 { | |
454 SwapBuffers(GL_hdc); | |
455 } | |
456 | |
457 void WIN_GL_UnloadLibrary(_THIS) | |
458 { | |
459 if ( this->gl_config.driver_loaded ) { | |
460 FreeLibrary((HMODULE)this->gl_config.dll_handle); | |
461 | |
462 this->gl_data->wglGetProcAddress = NULL; | |
463 this->gl_data->wglCreateContext = NULL; | |
464 this->gl_data->wglDeleteContext = NULL; | |
465 this->gl_data->wglMakeCurrent = NULL; | |
655
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466 this->gl_data->wglChoosePixelFormatARB = NULL; |
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467 this->gl_data->wglGetPixelFormatAttribivARB = NULL; |
0 | 468 |
469 this->gl_config.dll_handle = NULL; | |
470 this->gl_config.driver_loaded = 0; | |
471 } | |
472 } | |
473 | |
474 /* Passing a NULL path means load pointers from the application */ | |
475 int WIN_GL_LoadLibrary(_THIS, const char* path) | |
476 { | |
477 HMODULE handle; | |
478 | |
479 if ( gl_active ) { | |
480 SDL_SetError("OpenGL context already created"); | |
481 return -1; | |
482 } | |
483 | |
484 if ( path == NULL ) { | |
485 path = DEFAULT_GL_DRIVER_PATH; | |
486 } | |
487 handle = LoadLibrary(path); | |
488 if ( handle == NULL ) { | |
489 SDL_SetError("Could not load OpenGL library"); | |
490 return -1; | |
491 } | |
492 | |
493 /* Unload the old driver and reset the pointers */ | |
494 WIN_GL_UnloadLibrary(this); | |
495 | |
496 /* Load new function pointers */ | |
655
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497 memset(this->gl_data, 0, sizeof(*this->gl_data)); |
0 | 498 this->gl_data->wglGetProcAddress = (void * (WINAPI *)(const char *)) |
499 GetProcAddress(handle, "wglGetProcAddress"); | |
500 this->gl_data->wglCreateContext = (HGLRC (WINAPI *)(HDC)) | |
501 GetProcAddress(handle, "wglCreateContext"); | |
502 this->gl_data->wglDeleteContext = (BOOL (WINAPI *)(HGLRC)) | |
503 GetProcAddress(handle, "wglDeleteContext"); | |
504 this->gl_data->wglMakeCurrent = (BOOL (WINAPI *)(HDC, HGLRC)) | |
505 GetProcAddress(handle, "wglMakeCurrent"); | |
506 | |
507 if ( (this->gl_data->wglGetProcAddress == NULL) || | |
508 (this->gl_data->wglCreateContext == NULL) || | |
509 (this->gl_data->wglDeleteContext == NULL) || | |
510 (this->gl_data->wglMakeCurrent == NULL) ) { | |
511 SDL_SetError("Could not retrieve OpenGL functions"); | |
512 FreeLibrary(handle); | |
513 return -1; | |
514 } | |
515 | |
516 this->gl_config.dll_handle = handle; | |
517 strcpy(this->gl_config.driver_path, path); | |
518 this->gl_config.driver_loaded = 1; | |
519 return 0; | |
520 } | |
521 | |
522 void *WIN_GL_GetProcAddress(_THIS, const char* proc) | |
523 { | |
524 void *func; | |
525 | |
526 /* This is to pick up extensions */ | |
527 func = this->gl_data->wglGetProcAddress(proc); | |
528 if ( ! func ) { | |
529 /* This is probably a normal GL function */ | |
530 func = GetProcAddress(this->gl_config.dll_handle, proc); | |
531 } | |
532 return func; | |
533 } | |
534 | |
535 #endif /* HAVE_OPENGL */ |