OpenGLES 3.0 Shader Compile error on Android Device for in and out storage qualifiers

Question

So I am updating my app to use OpenGLES 3.0 to take advantage of transform feedback, but the shader isn't compiling.

error:

06-27 17:29:43.299  18593-18627/com.harmonicprocesses.penelopefree E/MyGLRenderer﹕ Could not compile shader 35633:
06-27 17:29:43.299  18593-18627/com.harmonicprocesses.penelopefree E/MyGLRenderer﹕ ERROR: 0:1: 'in' : Syntax error:  syntax error
INTERNAL ERROR: no main() function!
ERROR: 1 compilation errors.  No code generated.

Here is the vertex shader code:

    private final String vertexShaderSrc =
        "in float inValue;" +
        "out float outValue;" +

        "void main() {" +
        "    outValue = sqrt(inValue);" +
        "}";

Here is the compilation code:

        int vertexShader = MyGLRenderer.loadShader(GLES30.GL_VERTEX_SHADER,
            vertexShaderSrc);

...

    public static int loadShader(int shaderType, String source) {
    int shader = GLES30.glCreateShader(shaderType);
    if (shader != 0) {
        GLES30.glShaderSource(shader, source);
        GLES30.glCompileShader(shader);
        int[] compiled = new int[1];
        GLES30.glGetShaderiv(shader, GLES30.GL_COMPILE_STATUS, compiled, 0);
        if (compiled[0] == 0) {
            Log.e(TAG, "Could not compile shader " + shaderType + ":");
            Log.e(TAG, GLES30.glGetShaderInfoLog(shader));
            GLES30.glDeleteShader(shader);
            shader = 0;
        }
    }
    return shader;
}

Does anyone see anything wrong with this? If I change in and out to attribute varying respectively it doesn't throw an error, but glUseProgram throw gl error 1282 "Invalid Operation".

This is how I set up GL for es version 3.0:

public MyGLSurfaceViewLegacy(Context context) {
    super(context);
    setListenForTouchOnTouchListener();
    NoteSpectrum = DSPEngine.staticCalcNoteBins(AudioConstants.defaultBufferSize*2, 
            AudioConstants.sampleRate);
    // Create an OpenGL ES 2.0 context.
    setEGLContextClientVersion(3);
    // Set the Renderer for drawing on the GLSurfaceView
    mRenderer = new MyGLRenderer(context,this);
    setEGLConfigChooser(8, 8, 8, 8, 16, 0);
    mContextFactory = new MyContextFactory();
    setEGLContextFactory(mContextFactory);
    //mEGLWindowSurfaceFactory = new MyEGLWindowSurfaceFactory();
    //setEGLWindowSurfaceFactory(mEGLWindowSurfaceFactory);
    setRenderer(mRenderer);
    getHolder().setFormat(PixelFormat.TRANSLUCENT);

    // Render the view only when there is a change in the drawing data
    setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);



    mContext = context;


    drawOverlay = PreferenceManager.getDefaultSharedPreferences(mContext)
            .getBoolean("turn_on_visualization_key",true);
}


class MyContextFactory implements EGLContextFactory {
private int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
private EGLContext mEGLContext;
private EGLDisplay mEGLDisplay;
private MyGLSurfaceView mMyGLSurfaceView;
private EGL10 mEGL;

@Override
public EGLContext createContext(EGL10 egl, EGLDisplay display,
        EGLConfig eglConfig) {
    int[] attrib_list = {EGL_CONTEXT_CLIENT_VERSION, 3,
            EGL10.EGL_NONE };
    mEGL = egl;
    mEGLContext = egl.eglGetCurrentContext();
    mEGLDisplay = display;
    mEGLContext = egl.eglCreateContext(display, eglConfig, 
            egl.eglGetCurrentContext(), attrib_list);
    return mEGLContext;
}

samgak · Accepted Answer · 2015-06-28T01:54:11.780

1

Add the OpenGLES 3.0 version specifier to the start of your shader:

#version 300 es

Also make sure you are calling setEGLContextClientVersion(3) in your GLSurfaceView setup code.

edited Jun 28 '15 at 01:54

answered Jun 28 '15 at 01:23

samgak

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Thanks, but it throws an "Invalid #version" error with that header. – HPP Jun 28 '15 at 01:39
I am testing on a Nexus 6 which supports OpenGLES 3.1, and I added my EGL setup case there is something else missing there. – HPP Jun 28 '15 at 01:49
1

oh snap, I was missing the line break after the "#version 300 es" i.e. "#version 300 es\n". Thank you much! – HPP Jun 28 '15 at 02:04

OpenGLES 3.0 Shader Compile error on Android Device for in and out storage qualifiers

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