Android – eglconfig on HTLC desire, which can be configured to suspend the device

I am implementing my own eglconfigchooser and passing it to seteglconfigchooser () to select the best available configuration for the current device according to my application requirements

More specifically, I am querying all available configurations and selecting the configuration with the maximum depth buffer size (and the one I want to have the maximum color depth between those with the same depth buffer size). The code wall is as follows:

 @Override
 public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display)
 {
  //Querying number of configurations
  int[] num_conf = new int[1];
  egl.eglGetConfigs(display, null, 0, num_conf);  //if configuration array is null it still returns the number of configurations
  int configurations = num_conf[0];

  //Querying actual configurations
  EGLConfig[] conf = new EGLConfig[configurations];
  egl.eglGetConfigs(display, conf, configurations, num_conf);

  EGLConfig result = null;

  for(int i = 0; i < configurations; i++)
  {
   Log.v("EGLConfigChooser", "Configuration #" + i );
   print(egl, display, conf[i]);
   result = better(result, conf[i], egl, display);
  }

  Log.v("EGLConfigChooser", "Chosen EGLConfig:");
  print(egl, display, result);

  return result;
 }

 /**
  * Returns the best of the two EGLConfig passed according to depth and colours
  * @param a The first candidate
  * @param b The second candidate
  * @return The chosen candidate
  */
 private EGLConfig better(EGLConfig a, EGLConfig b, EGL10 egl, EGLDisplay display)
 {
  if(a == null) return b;

  EGLConfig result = null;

  int[] value = new int[1];

  egl.eglGetConfigAttrib(display, a, EGL10.EGL_DEPTH_SIZE, value);
  int depthA = value[0];

  egl.eglGetConfigAttrib(display, b, EGL10.EGL_DEPTH_SIZE, value);
  int depthB = value[0];

  if(depthA > depthB)
   result = a;
  else if(depthA < depthB)
   result = b;
  else //if depthA == depthB
  {
   egl.eglGetConfigAttrib(display, a, EGL10.EGL_RED_SIZE, value);
   int redA = value[0];

   egl.eglGetConfigAttrib(display, b, EGL10.EGL_RED_SIZE, value);
   int redB = value[0];

   if(redA > redB)
    result = a;
   else if(redA < redB)
    result = b;
   else //if redA == redB
   {
    //Don't care
    result = a;
   }
  }

  return result;
 }

(the print method outputs the eglconfig value to the logger)

Now that it seems to be working properly, it selects the following configuration:

01-30 18:57:04.424: VERBOSE/EGLConfigChooser(1093): Chosen EGLConfig:
01-30 18:57:04.424: VERBOSE/EGLConfigChooser(1093): EGL_RED_SIZE  = 8
01-30 18:57:04.424: VERBOSE/EGLConfigChooser(1093): EGL_BLUE_SIZE  = 8
01-30 18:57:04.424: VERBOSE/EGLConfigChooser(1093): EGL_GREEN_SIZE  = 8
01-30 18:57:04.424: VERBOSE/EGLConfigChooser(1093): EGL_ALPHA_SIZE  = 8
01-30 18:57:04.424: VERBOSE/EGLConfigChooser(1093): EGL_DEPTH_SIZE  = 24
01-30 18:57:04.424: VERBOSE/EGLConfigChooser(1093): EGL_ALPHA_FORMAT  = 24
01-30 18:57:04.424: VERBOSE/EGLConfigChooser(1093): EGL_ALPHA_MASK_SIZE  = 0
01-30 18:57:04.424: VERBOSE/EGLConfigChooser(1093): EGL_STENCIL_SIZE  = 8

The problem is that when using this configuration, the phone screen will turn green with purple artifacts (the scene should be black with a wooden table). It completely hangs and stops responding to any type of input. All I can do is terminate my process through the debugger. When I do so, the device will restart (?!)

Why does eglgetconfigs return configurations that cause such problems? Have any of you ever experienced something like this, or found a flaw in my code? I checked it carefully, but it looks good http://brandnewreality.com/blog/android-egl-querying-your-gl-driver (inspired by)

Thanks for your help.

resolvent:

Try adding:

getHolder().setFormat(PixelFormat.RGBA_8888);

After setting the GL configuration selector, for the surface constructor. Basically, I encountered a crash when selecting the format 8,8,8,0,0,0 (R8, G8, B8, A0, Z0, stencil0), until I added this line

Steve