nuclear@2: #include "opengl.h"
nuclear@2: #include "logger.h"
nuclear@2: 
nuclear@2: extern Display *dpy;
nuclear@2: extern Window root_win;
nuclear@2: extern int screen_num;
nuclear@2: extern int root_width, root_height;
nuclear@2: 
nuclear@2: GLXContext create_gl(Window xwin)
nuclear@2: {
nuclear@2: 	static int glxattr[] = {
nuclear@2: 		GLX_USE_GL, 1,
nuclear@2: 		GLX_RGBA,
nuclear@2: 		GLX_DOUBLEBUFFER,
nuclear@2: 		GLX_RED_SIZE, 8,
nuclear@2: 		GLX_GREEN_SIZE, 8,
nuclear@2: 		GLX_BLUE_SIZE, 8,
nuclear@2: 		GLX_DEPTH_SIZE, 16,
nuclear@2: 		None
nuclear@2: 	};
nuclear@2: 
nuclear@2: 	XVisualInfo *vis_info = glXChooseVisual(dpy, screen_num, glxattr);
nuclear@2: 	if(!vis_info) {
nuclear@2: 		log_error("failed to find suitable GLX visual\n");
nuclear@2: 		return 0;
nuclear@2: 	}
nuclear@2: 
nuclear@2: 	GLXContext ctx = glXCreateContext(dpy, vis_info, 0, True);
nuclear@2: 	if(!ctx) {
nuclear@2: 		log_error("failed to create OpenGL context\n");
nuclear@2: 		XFree(vis_info);
nuclear@2: 		return 0;
nuclear@2: 	}
nuclear@2: 	XFree(vis_info);
nuclear@2: 
nuclear@2: 	if(!glXMakeCurrent(dpy, xwin, ctx)) {
nuclear@2: 		log_error("failed to attach OpenGL context to window\n");
nuclear@2: 		glXDestroyContext(dpy, ctx);
nuclear@2: 		return 0;
nuclear@2: 	}
nuclear@2: 	return ctx;
nuclear@2: }
nuclear@2: 
nuclear@2: void destroy_gl(GLXContext ctx)
nuclear@2: {
nuclear@2: 	glXMakeCurrent(dpy, 0, 0);
nuclear@2: 	glXDestroyContext(dpy, ctx);
nuclear@2: }