Date: Sun, 22 Mar 2009 12:52:29 +0000 From: Luke Benstead Subject: OpenGL 3.0 Context Creation I've attached a patch which implements OpenGL 3.x context creation on the latest SVN. I've added two options to SDL_GL_SetAttribute, these are SDL_GL_CONTEXT_MAJOR_VERSION and SDL_GL_CONTEXT_MINOR_VERSION. These default to 2 and 1 respectively. If the major version is less than 3 then the current context creation method is used, otherwise the appropriate new context creation function is called (depending on the platform). Sample code: if (SDL_Init(SDL_INIT_VIDEO) != 0) { printf("Unable to initialize SDL: %s\n", SDL_GetError()); return 1; } SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3); //Without these 2 lines, SDL will create a GL 2.x context SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0); SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); SDL_Surface* screen = SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL | SDL_FULLSCREEN ); I've implemented context creation on both Win32 and X and run basic tests on both. This patch doesn't provide access to all the options allowed by the new context creation (e.g. shared contexts, forward compatible contexts) but they can be added pretty easily.

--- a/src/video/SDL_video.c	Tue Mar 24 10:33:12 2009 +0000
+++ b/src/video/SDL_video.c	Tue Mar 24 10:43:53 2009 +0000
@@ -257,6 +257,8 @@
     _this->gl_config.multisamplesamples = 0;
     _this->gl_config.retained_backing = 1;
     _this->gl_config.accelerated = -1;  /* not known, don't set */
+    _this->gl_config.major_version = 2;
+    _this->gl_config.minor_version = 1;
 
     /* Initialize the video subsystem */
     if (_this->VideoInit(_this) < 0) {
@@ -2694,6 +2696,12 @@
     case SDL_GL_RETAINED_BACKING:
         _this->gl_config.retained_backing = value;
         break;
+    case SDL_GL_CONTEXT_MAJOR_VERSION:
+        _this->gl_config.major_version = value;
+        break;
+    case SDL_GL_CONTEXT_MINOR_VERSION:
+        _this->gl_config.minor_version = value;
+        break;
     default:
         SDL_SetError("Unknown OpenGL attribute");
         retval = -1;