Hello.
I’m using SDL-1.2 on Linux box with Quadro 4 XGL. Quadro has the VESA 3pin
stereo port, and I attached the stereo shutter glasses to the card. Codes
written with GLUT could drive those glasses correctly, but SDL couldn’t even
when SDL_GL_SetAttribute(SDL_GL_STEREO, 1) was called.
With some testing programs, finally I found that OpenGL stereo quadbuffer mode
would be enabled in case that glXMakeCurrent() is called properly after
glXCreateContext(). I know SDL_SetVideoMode() does call X11_GL_MakeCurrent(),
but I don’t know the reason why it doesn’t work.
Quick hack follows. This patch works fine with SDL-1.2.7.
banb
— SDL-1.2.7/src/video/x11/SDL_x11gl.c.ste 2004-02-19 02:22:09.000000000 +0900
+++ SDL-1.2.7/src/video/x11/SDL_x11gl.c 2004-05-31 13:25:04.375053196 +0900
@@ -126,7 +126,6 @@
if( this->gl_config.stereo ) {
attribs[i++] = GLX_STEREO;
-
attribs[i++] = this->gl_config.stereo;}
if( this->gl_config.multisamplebuffers ) {
@@ -212,6 +211,13 @@
return -1;
}
- if ( ! this->gl_data->glXMakeCurrent(GFX_Display,
-
SDL_Window, glx_context) ) { -
SDL_SetError("Unable to make GL context current"); -
return -1; - }
- XSync( GFX_Display, False );+
gl_active = 1;
#else
SDL_SetError(“X11 driver not configured with OpenGL”);