XSetWindowAttributes attr;
unsigned long mask;
Window root;
- GLXContext ctx;
+ GLXContext ctx = NULL;
XVisualInfo *visinfo;
int width = 100, height = 100;
root = RootWindow(dpy, scrnum);
visinfo = glXChooseVisual(dpy, scrnum, attribSingle);
- if (!visinfo) {
+ if (!visinfo)
visinfo = glXChooseVisual(dpy, scrnum, attribDouble);
- if (!visinfo) {
- fprintf(stderr, "Error: couldn't find RGB GLX visual\n");
- return;
+
+ if (visinfo)
+ ctx = glXCreateContext( dpy, visinfo, NULL, allowDirect );
+
+#ifdef GLX_VERSION_1_3
+ {
+ int fbAttribSingle[] = {
+ GLX_RENDER_TYPE, GLX_RGBA_BIT,
+ GLX_RED_SIZE, 1,
+ GLX_GREEN_SIZE, 1,
+ GLX_BLUE_SIZE, 1,
+ GLX_DOUBLEBUFFER, GL_TRUE,
+ None };
+ int fbAttribDouble[] = {
+ GLX_RENDER_TYPE, GLX_RGBA_BIT,
+ GLX_RED_SIZE, 1,
+ GLX_GREEN_SIZE, 1,
+ GLX_BLUE_SIZE, 1,
+ None };
+ GLXFBConfig *configs = NULL;
+ int nConfigs;
+
+ if (!visinfo)
+ configs = glXChooseFBConfig(dpy, scrnum, fbAttribSingle, &nConfigs);
+ if (!visinfo)
+ configs = glXChooseFBConfig(dpy, scrnum, fbAttribDouble, &nConfigs);
+
+ if (configs) {
+ visinfo = glXGetVisualFromFBConfig(dpy, configs[0]);
+ ctx = glXCreateNewContext(dpy, configs[0], GLX_RGBA_TYPE, NULL, allowDirect);
+ XFree(configs);
}
}
+#endif
+
+ if (!visinfo) {
+ fprintf(stderr, "Error: couldn't find RGB GLX visual or fbconfig\n");
+ return;
+ }
+
+ if (!ctx) {
+ fprintf(stderr, "Error: glXCreateContext failed\n");
+ XFree(visinfo);
+ return;
+ }
attr.background_pixel = 0;
attr.border_pixel = 0;
0, visinfo->depth, InputOutput,
visinfo->visual, mask, &attr);
- ctx = glXCreateContext( dpy, visinfo, NULL, allowDirect );
- if (!ctx) {
- fprintf(stderr, "Error: glXCreateContext failed\n");
- XFree(visinfo);
- XDestroyWindow(dpy, win);
- return;
- }
-
if (glXMakeCurrent(dpy, win, ctx)) {
const char *serverVendor = glXQueryServerString(dpy, scrnum, GLX_VENDOR);
const char *serverVersion = glXQueryServerString(dpy, scrnum, GLX_VERSION);
printf("OpenGL vendor string: %s\n", glVendor);
printf("OpenGL renderer string: %s\n", glRenderer);
printf("OpenGL version string: %s\n", glVersion);
+#ifdef GL_VERSION_2_0
+ if (glVersion[0] >= '2' && glVersion[1] == '.') {
+ char *v = (char *) glGetString(GL_SHADING_LANGUAGE_VERSION);
+ printf("OpenGL shading language version string: %s\n", v);
+ }
+#endif
+
printf("OpenGL extensions:\n");
print_extension_list(glExtensions);
if (limits)
/* multisample attribs */
#ifdef GLX_ARB_multisample
- if (ext && strstr(ext, "GLX_ARB_multisample") == 0) {
+ if (ext && strstr(ext, "GLX_ARB_multisample")) {
glXGetConfig(dpy, vInfo, GLX_SAMPLE_BUFFERS_ARB, &attribs->numMultisample);
glXGetConfig(dpy, vInfo, GLX_SAMPLES_ARB, &attribs->numSamples);
}