I'm facing a problem with devices using the Adreno 200 or Adreno 205, on Android devices.
When calling glReadPixels on a Pbuffer some devices will just kill the app with no message at all. Others will give me the next trace and then freeze for around 10 seconds before killing the app.
Unable to Find Phys Addr for 0
So far the affected devices where the problem is reproducible are:
Galaxy Y, Galaxy Ace, Galaxy Mini, Galaxy Young
Which all have an Adreno 200 or 205 GPU.
I've also tested the code in the next devices where it works correctly as expected, no problems at all:
Nexy 4, Nexus 7, Nexus Galaxy, SGI, SGII, SGIII, Motorola Mini-Defy, and some others more.
I've put together a quick test function which reproduces the problem. Maybe someone can spot the issue. Please this is only a test method, no reviews about it are necessary as I just put it together to allow testing the bug, if I missed something let me know. Thanks
private static void bugTest()
{
EGL10 egl = (EGL10)EGLContext.getEGL();
EGLDisplay eglDisplay = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
// Initialize
int[] version = new int[2];
egl.eglInitialize(eglDisplay, version);
// Query total number of configurations
int[] totalConfigurations = new int[1];
egl.eglGetConfigs(eglDisplay, null, 0, totalConfigurations);
EGLConfig[] configurationsList = new EGLConfig[totalConfigurations[0]];
int attribs[] = { EGL10.EGL_RENDERABLE_TYPE, 4 /* EGL_OPENGL_ES2_BIT */, EGL10.EGL_RED_SIZE, 1, EGL10.EGL_GREEN_SIZE, 1, EGL10.EGL_BLUE_SIZE, 1, EGL10.EGL_NONE };
if (egl.eglChooseConfig(eglDisplay, attribs, configurationsList, 1, totalConfigurations) == false)
{
Log.e(TAG, "Could not find config for GLES2");
egl.eglTerminate(eglDisplay);
return;
}
// Create the PBuffer
EGLSurface eglSurface = null;
final int surfaceWidth = 512;
final int surfaceHeight = 512;
try
{
int[] attribList = new int[] { EGL10.EGL_WIDTH, surfaceWidth, EGL10.EGL_HEIGHT, surfaceHeight, EGL10.EGL_NONE };
eglSurface = egl.eglCreatePbufferSurface(eglDisplay, configurationsList[0], attribList);
}
catch (Exception ex)
{
Log.e(TAG, "Failed to create surface");
egl.eglTerminate(eglDisplay);
return;
}
// BUG Test for glReadPixels
if (eglSurface != null)
{
// Create context
final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
final int GLES_VERSION = 2;
int[] attribList = { EGL_CONTEXT_CLIENT_VERSION, GLES_VERSION, EGL10.EGL_NONE };
EGLContext eglContext = egl.eglCreateContext(eglDisplay, configurationsList[0], EGL10.EGL_NO_CONTEXT, attribList);
if (eglContext != null)
{
// Attach context to surface
if (egl.eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext) == true)
{
// Perform the actual bug test
GL10 gl = (GL10)eglContext.getGL();
int buffer[] = new int[surfaceWidth * surfaceHeight];
IntBuffer wrappedBuffer = IntBuffer.wrap(buffer);
wrappedBuffer.position(0);
// BUG: Line of failure
gl.glReadPixels(0, 0, surfaceWidth, surfaceHeight, GL10.GL_RGB, GL10.GL_UNSIGNED_BYTE, wrappedBuffer);
// Also fails when using RGBA
//gl.glReadPixels(0, 0, surfaceWidth, surfaceHeight, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, wrappedBuffer);
}
egl.eglDestroyContext(eglDisplay, eglContext);
}
egl.eglDestroySurface(display, eglSurface);
}
egl.eglTerminate(eglDisplay);
}