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eglChooseConfig on Samsung Galaxy S5 running ARM Mali T628 MP6

Pavel Krajcevski

Hi, I'm trying to run a benchmarking tool on the Samsung Galaxy S5 to test some optimizations and perhaps start experimenting with the use of ASTC. It seems like the GL driver is failing to create a context without an associated window to render into. As you may know, opening a window on Android is a fairly involved process, so ideally I'd like to avoid it. I've attached the code that should be initializing the context and the results below:

EGLint error = EGL_SUCCESS;
if (EGL_SUCCESS != (error = eglGetError())) {
    Debugf("Prior EGL error: %s\n", getEGLErrorStr(error));
    return NULL;            
}

fDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (fDisplay == EGL_NO_DISPLAY || EGL_SUCCESS != (error = eglGetError())) {
    Debugf("eglGetDisplay failed -- error: %s\n", getEGLErrorStr(error));
    return NULL;
}

EGLint majorVersion;
EGLint minorVersion;
if (EGL_TRUE != eglInitialize(fDisplay, &majorVersion, &minorVersion)) {
    if (EGL_SUCCESS != (error = eglGetError())) {
        Debugf("eglInitialize failed -- error: %s\n", getEGLErrorStr(error));
        return NULL;            
    }
}

Debugf("Major: %d, minor: %d\n", majorVersion, minorVersion);
Debugf("VENDOR: %s\n", eglQueryString(fDisplay, EGL_VENDOR));
Debugf("APIS: %s\n", eglQueryString(fDisplay, EGL_CLIENT_APIS));
Debugf("VERSION: %s\n", eglQueryString(fDisplay, EGL_VERSION));
Debugf("EXTENSIONS %s\n", eglQueryString(fDisplay, EGL_EXTENSIONS));

if (!eglBindAPI(EGL_OPENGL_ES_API)) {
    return NULL;
}

if (EGL_SUCCESS != (error = eglGetError())) {
    Debugf("eglBindAPI failed -- error: %s\n", getEGLErrorStr(error));
    return NULL;            
}

EGLint numConfigs;
const EGLint configAttribs[] = {
    EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
    EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
    EGL_RED_SIZE, 8,
    EGL_GREEN_SIZE, 8,
    EGL_BLUE_SIZE, 8,
    EGL_ALPHA_SIZE, EGL_DONT_CARE,
    EGL_DEPTH_SIZE, EGL_DONT_CARE,
    EGL_STENCIL_SIZE, EGL_DONT_CARE,
    EGL_NONE
};

EGLConfig surfaceConfig;
if (!eglChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs)) {
    Debugf("eglChooseConfig failed. EGL Error: 0x%08x\n", eglGetError());
    return NULL;
}

The output:


Major: 1, minor: 4

VENDOR: Android

APIS: OpenGL_ES

VERSION: 1.4 Android META-EGL

EXTENSIONS EGL_KHR_get_all_proc_addresses EGL_ANDROID_presentation_time

eglChooseConfig failed. EGL Error: 0x00003001

I'm hesitant to say that this is a bug in the driver, but I'm not totally sure what I'm doing wrong in my initialization code. Any help would be appreciated . Also, if this isn't an appropriate forum for a question like this, I'd be glad to direct it to the right place.

Parents
  • 0

    Small update. The OpenGL ES Extensions supported on the device list


    OES_surfaceless_context

    This extension allows for the creation of surfaceless contexts (i.e. contexts without a window to render into), however, it seems like the accompanying EGL extension:

    EGL_KHR_surfaceless_context

    does not show up in the list of EGL extensions. The GLES extension is kind of useless without the accompanying EGL extension, but it does seem like there is some support and motivation for creating a context without an associated window. That being said, following the procedures in those extensions to create a context without a default framebuffer has largely resulted in the same errors as my OP.

Reply
  • 0

    Small update. The OpenGL ES Extensions supported on the device list


    OES_surfaceless_context

    This extension allows for the creation of surfaceless contexts (i.e. contexts without a window to render into), however, it seems like the accompanying EGL extension:

    EGL_KHR_surfaceless_context

    does not show up in the list of EGL extensions. The GLES extension is kind of useless without the accompanying EGL extension, but it does seem like there is some support and motivation for creating a context without an associated window. That being said, following the procedures in those extensions to create a context without a default framebuffer has largely resulted in the same errors as my OP.

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