/*
* Copyright (C) 2008 Tunsgten Graphics,Inc. All Rights Reserved.
*/
/*
* List OpenGL ES extensions.
* Print ES 1 or ES 2 extensions depending on which library we're
* linked with: libGLESv1_CM.so vs libGLESv2.so
*/
#define GL_GLEXT_PROTOTYPES
#include <assert.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include <EGL/egl.h>
/*
* Print a list of extensions, with word-wrapping.
*/
static void
print_extension_list(const char *ext)
{
const char indentString[] = " ";
const int indent = 4;
const int max = 79;
int width, i, j;
if (!ext || !ext[0])
return;
width = indent;
printf("%s", indentString);
i = j = 0;
while (1) {
if (ext[j] == ' ' || ext[j] == 0) {
/* found end of an extension name */
const int len = j - i;
if (width + len > max) {
/* start a new line */
printf("\n");
width = indent;
printf("%s", indentString);
}
/* print the extension name between ext[i] and ext[j] */
while (i < j) {
printf("%c", ext[i]);
i++;
}
/* either we're all done, or we'll continue with next extension */
width += len + 1;
if (ext[j] == 0) {
break;
}
else {
i++;
j++;
if (ext[j] == 0)
break;
printf(", ");
width += 2;
}
}
j++;
}
printf("\n");
}
static void
info(EGLDisplay egl_dpy)
{
const char *s;
s = eglQueryString(egl_dpy, EGL_VERSION);
printf("EGL_VERSION: %s\n", s);
s = eglQueryString(egl_dpy, EGL_VENDOR);
printf("EGL_VENDOR: %s\n", s);
s = eglQueryString(egl_dpy, EGL_EXTENSIONS);
printf("EGL_EXTENSIONS:\n", s);
print_extension_list((char *) s);
s = eglQueryString(egl_dpy, EGL_CLIENT_APIS);
printf("EGL_CLIENT_APIS: %s\n", s);
const char *glGetString (int name);
#define GL_RENDERER 0x1F01
#define GL_VERSION 0x1F02
#define GL_EXTENSIONS 0x1F03
printf("GL_VERSION: %s\n", (char *) glGetString(GL_VERSION));
printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER));
printf("GL_EXTENSIONS:\n");
print_extension_list((char *) glGetString(GL_EXTENSIONS));
}
/*
* Create an RGB, double-buffered X window.
* Return the window and context handles.
*/
static void
make_x_window(Display *x_dpy, EGLDisplay egl_dpy,
const char *name,
int x, int y, int width, int height, int es_ver,
Window *winRet,
EGLContext *ctxRet,
EGLSurface *surfRet)
{
EGLint attribs[] = {
EGL_RENDERABLE_TYPE, 0x0,
EGL_RED_SIZE, 1,
EGL_GREEN_SIZE, 1,
EGL_BLUE_SIZE, 1,
EGL_NONE
};
EGLint ctx_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 0,
EGL_NONE
};
int scrnum;
XSetWindowAttributes attr;
unsigned long mask;
Window root;
Window win;
XVisualInfo *visInfo, visTemplate;
int num_visuals;
EGLContext ctx;
EGLConfig config;
EGLint num_configs;
EGLint vid;
scrnum = DefaultScreen( x_dpy );
root = RootWindow( x_dpy, scrnum );
if (es_ver == 1)
attribs[1] = EGL_OPENGL_ES_BIT;
else
attribs[1] = EGL_OPENGL_ES2_BIT;
ctx_attribs[1] = es_ver;
if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs)) {
printf("Error: couldn't get an EGL visual config\n");
exit(1);
}
assert(config);
assert(num_configs > 0);
if (!eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) {
printf("Error: eglGetConfigAttrib() failed\n");
exit(1);
}
/* The X window visual must match the EGL config */
visTemplate.visualid = vid;
visInfo = XGetVisualInfo(x_dpy, VisualIDMask, &visTemplate, &num_visuals);
if (!visInfo) {
printf("Error: couldn't get X visual\n");
exit(1);
}
/* window attributes */
attr.background_pixel = 0;
attr.border_pixel = 0;
attr.colormap = XCreateColormap( x_dpy, root, visInfo->visual, AllocNone);
attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
win = XCreateWindow( x_dpy, root, 0, 0, width, height,
0, visInfo->depth, InputOutput,
visInfo->visual, mask, &attr );
/* set hints and properties */
{
XSizeHints sizehints;
sizehints.x = x;
sizehints.y = y;
sizehints.width = width;
sizehints.height = height;
sizehints.flags = USSize | USPosition;
XSetNormalHints(x_dpy, win, &sizehints);
XSetStandardProperties(x_dpy, win, name, name,
None, (char **)NULL, 0, &sizehints);
}
eglBindAPI(EGL_OPENGL_ES_API);
ctx = eglCreateContext(egl_dpy, config, EGL_NO_CONTEXT, ctx_attribs );
if (!ctx) {
printf("Error: eglCreateContext failed\n");
exit(1);
}
*surfRet = eglCreateWindowSurface(egl_dpy, config, win, NULL);
if (!*surfRet) {
printf("Error: eglCreateWindowSurface failed\n");
exit(1);
}
XFree(visInfo);
*winRet = win;
*ctxRet = ctx;
}
static void
usage(void)
{
printf("Usage:\n");
printf(" -display <displayname> set the display to run on\n");
}
int
main(int argc, char *argv[])
{
const int winWidth = 400, winHeight = 300;
Display *x_dpy;
Window win;
EGLSurface egl_surf;
EGLContext egl_ctx;
EGLDisplay egl_dpy;
char *dpyName = NULL;
EGLint egl_major, egl_minor, es_ver;
int i;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-display") == 0) {
dpyName = argv[i+1];
i++;
}
else {
usage();
return -1;
}
}
x_dpy = XOpenDisplay(dpyName);
if (!x_dpy) {
printf("Error: couldn't open display %s\n",
dpyName ? dpyName : getenv("DISPLAY"));
return -1;
}
egl_dpy = eglGetDisplay(x_dpy);
if (!egl_dpy) {
printf("Error: eglGetDisplay() failed\n");
return -1;
}
if (!eglInitialize(egl_dpy, &egl_major, &egl_minor)) {
printf("Error: eglInitialize() failed\n");
return -1;
}
es_ver = 1;
/* decide the version from the executable's name */
if (argc > 0 && argv[0] && strstr(argv[0], "es2"))
es_ver = 2;
make_x_window(x_dpy, egl_dpy,
"ES info", 0, 0, winWidth, winHeight, es_ver,
&win, &egl_ctx, &egl_surf);
/*XMapWindow(x_dpy, win);*/
if (!eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx)) {
printf("Error: eglMakeCurrent() failed\n");
return -1;
}
info(egl_dpy);
eglDestroyContext(egl_dpy, egl_ctx);
eglDestroySurface(egl_dpy, egl_surf);
eglTerminate(egl_dpy);
XDestroyWindow(x_dpy, win);
XCloseDisplay(x_dpy);
return 0;
}