diff --git a/opengl/tests/swapinterval/swapinterval.cpp b/opengl/tests/swapinterval/swapinterval.cpp
index cf908a0..80a6c21 100644
--- a/opengl/tests/swapinterval/swapinterval.cpp
+++ b/opengl/tests/swapinterval/swapinterval.cpp
@@ -1,21 +1,19 @@
 /*
-**
-** Copyright 2006, The Android Open Source Project
-**
-** Licensed under the Apache License, Version 2.0 (the "License"); 
-** you may not use this file except in compliance with the License. 
-** You may obtain a copy of the License at 
-**
-**     http://www.apache.org/licenses/LICENSE-2.0 
-**
-** Unless required by applicable law or agreed to in writing, software 
-** distributed under the License is distributed on an "AS IS" BASIS, 
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
-** See the License for the specific language governing permissions and 
-** limitations under the License.
-*/
-
-#define LOG_TAG "fillrate"
+ **
+ ** Copyright 2006, The Android Open Source Project
+ **
+ ** Licensed under the Apache License, Version 2.0 (the "License"); 
+ ** you may not use this file except in compliance with the License. 
+ ** You may obtain a copy of the License at 
+ **
+ **     http://www.apache.org/licenses/LICENSE-2.0 
+ **
+ ** Unless required by applicable law or agreed to in writing, software 
+ ** distributed under the License is distributed on an "AS IS" BASIS, 
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+ ** See the License for the specific language governing permissions and 
+ ** limitations under the License.
+ */
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -33,72 +31,90 @@
 int main(int argc, char** argv)
 {
     EGLint configAttribs[] = {
-         EGL_DEPTH_SIZE, 0,
-         EGL_NONE
-     };
-     
-     EGLint majorVersion;
-     EGLint minorVersion;
-     EGLContext context;
-     EGLConfig config;
-     EGLSurface surface;
-     EGLint w, h;
-     EGLDisplay dpy;
+            EGL_SURFACE_TYPE,   EGL_WINDOW_BIT,
+            EGL_NONE
+    };
 
-     dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
-     eglInitialize(dpy, &majorVersion, &minorVersion);
-          
-     EGLNativeWindowType window = android_createDisplaySurface();
-     
-     status_t err = EGLUtils::selectConfigForNativeWindow(
-             dpy, configAttribs, window, &config);
-     if (err) {
-         fprintf(stderr, "couldn't find an EGLConfig matching the screen format\n");
-         return 0;
-     }
+    EGLint majorVersion;
+    EGLint minorVersion;
+    EGLContext context;
+    EGLConfig config;
+    EGLint numConfigs=0;
+    EGLSurface surface;
+    EGLint w, h;
+    EGLDisplay dpy;
 
-     surface = eglCreateWindowSurface(dpy, config, window, NULL);
-     context = eglCreateContext(dpy, config, NULL, NULL);
-     eglMakeCurrent(dpy, surface, surface, context);   
-     eglQuerySurface(dpy, surface, EGL_WIDTH, &w);
-     eglQuerySurface(dpy, surface, EGL_HEIGHT, &h);
-     
-     printf("w=%d, h=%d\n", w, h);
-     
-     glDisable(GL_DITHER);
-     glEnable(GL_BLEND);
+    dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    eglInitialize(dpy, 0 ,0) ;//&majorVersion, &minorVersion);
+    eglGetConfigs(dpy, NULL, 0, &numConfigs);
+    printf("# configs = %d\n", numConfigs);
+    
+    EGLNativeWindowType window = android_createDisplaySurface();
 
-     glViewport(0, 0, w, h);
-     glOrthof(0, w, 0, h, 0, 1);
+    status_t err = EGLUtils::selectConfigForNativeWindow(
+            dpy, configAttribs, window, &config);
+    if (err) {
+        fprintf(stderr, "couldn't find an EGLConfig matching the screen format\n");
+        return 0;
+    }
 
-     eglSwapInterval(dpy, 1);
+    EGLint r,g,b,a;
+    eglGetConfigAttrib(dpy, config, EGL_RED_SIZE,   &r);
+    eglGetConfigAttrib(dpy, config, EGL_GREEN_SIZE, &g);
+    eglGetConfigAttrib(dpy, config, EGL_BLUE_SIZE,  &b);
+    eglGetConfigAttrib(dpy, config, EGL_ALPHA_SIZE, &a);
 
-     glClearColor(1,0,0,0);
-     glClear(GL_COLOR_BUFFER_BIT);
-     eglSwapBuffers(dpy, surface);
+    surface = eglCreateWindowSurface(dpy, config, window, NULL);
+    if (surface == EGL_NO_SURFACE) {
+        EGLint err = eglGetError();
+        fprintf(stderr, "%s, config=%p, format = %d-%d-%d-%d\n",
+                EGLUtils::strerror(err), config, r,g,b,a);
+        return 0;
+    } else {
+        printf("config=%p, format = %d-%d-%d-%d\n", config, r,g,b,a);
+    }
+
+    context = eglCreateContext(dpy, config, NULL, NULL);
+    eglMakeCurrent(dpy, surface, surface, context);   
+    eglQuerySurface(dpy, surface, EGL_WIDTH, &w);
+    eglQuerySurface(dpy, surface, EGL_HEIGHT, &h);
+
+    printf("w=%d, h=%d\n", w, h);
+
+    glDisable(GL_DITHER);
+    glEnable(GL_BLEND);
+
+    glViewport(0, 0, w, h);
+    glOrthof(0, w, 0, h, 0, 1);
+
+    eglSwapInterval(dpy, 1);
+
+    glClearColor(1,0,0,0);
+    glClear(GL_COLOR_BUFFER_BIT);
+    eglSwapBuffers(dpy, surface);
 
 
-     int time = 10;
-     printf("screen should flash red/green quickly for %d s...\n", time);
-     
-     int c = 0;
-     nsecs_t start = systemTime();
-     nsecs_t t;
-     do {
-         glClearColor(1,0,0,0);
-         glClear(GL_COLOR_BUFFER_BIT);
-         eglSwapBuffers(dpy, surface);
-         glClearColor(0,1,0,0);
-         glClear(GL_COLOR_BUFFER_BIT);
-         eglSwapBuffers(dpy, surface);
-         t = systemTime() - start;
-         c += 2;
-     } while (int(ns2s(t))<=time);
-     
-     double p =  (double(t) / c) / 1000000000.0;
-     printf("refresh-rate is %f fps (%f ms)\n", 1.0f/p, p*1000.0);
-       
-     eglTerminate(dpy);
-     
-     return 0;
+    int time = 10;
+    printf("screen should flash red/green quickly for %d s...\n", time);
+
+    int c = 0;
+    nsecs_t start = systemTime();
+    nsecs_t t;
+    do {
+        glClearColor(1,0,0,0);
+        glClear(GL_COLOR_BUFFER_BIT);
+        eglSwapBuffers(dpy, surface);
+        glClearColor(0,1,0,0);
+        glClear(GL_COLOR_BUFFER_BIT);
+        eglSwapBuffers(dpy, surface);
+        t = systemTime() - start;
+        c += 2;
+    } while (int(ns2s(t))<=time);
+
+    double p =  (double(t) / c) / 1000000000.0;
+    printf("refresh-rate is %f fps (%f ms)\n", 1.0f/p, p*1000.0);
+
+    eglTerminate(dpy);
+
+    return 0;
 }