can't compile gles 30 on nexus 6 (and similar devices)

Question

I am running into an issue that does not make too much sense to me. I am testing some simple GLES30 code on a Nexus 6 device an HTC. I am setting the code to API 23 and OS lollipop 5.0. According to the wiki it uses Adreno 420 which supports full gles 3.1 profile

https://en.wikipedia.org/wiki/Nexus_6

Yet, a simple shader fails the compilation as below:

Shader code:

#version 300 es

layout(location = 4) in vec4 a_position;
layout(location = 5) in vec4 a_color;

uniform mat4    u_mvpMatrix;
out     vec4    v_color;

void main()
{
    v_color = a_color;
    gl_Position = u_mvpMatrix * a_position;
}

Logs:

Vertex shader failed to compile with the following errors:
ERROR: 0:2: error(#308) Profile " " is not available in shader version 1777753240
ERROR: 0:1: error(#132) Syntax error: "es" parse error
ERROR: error(#273) 2 compilation errors.  No code generated

I set my Context to 3.0 as below.

const EGLint context_attribs[] = {EGL_CONTEXT_CLIENT_VERSION,
                            3,  // Request opengl ES3.0
                            EGL_NONE};
context_ = eglCreateContext(display_, config_, NULL, context_attribs);

still did not compile.

Am I missing something?

thx!

Joseph Rosson · Accepted Answer · 2016-08-12T20:13:48.767

Typically this means that your device does not support the GLSL version you are requiring. Try running the following code to confirm that the GLSL version supports GLSL 3.

glGetString(GL_SHADING_LANGUAGE_VERSION);

From here you can determine how to read this format.

The GL_VERSION and GL_SHADING_LANGUAGE_VERSION strings begin with a version number. The version number uses one of these forms: major_number.minor_number major_number.minor_number.release_number Vendor-specific information may follow the version number. Its format depends on the implementation, but a space always separates the version number and the vendor-specific information.

Here is the configuration I currently use.

#define EGL_OPENGL_ES3_BIT_KHR 0x0040
const EGLint attribs[] = {
    EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT_KHR,
    EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
    EGL_BLUE_SIZE, 8,
    EGL_GREEN_SIZE, 8,
    EGL_RED_SIZE, 8,
    EGL_ALPHA_SIZE, 8,
    EGL_DEPTH_SIZE, 8,
    EGL_STENCIL_SIZE, 8,
    EGL_NONE
};
...
eglChooseConfig(display, attribs, &config, 1, &numConfigs);
...
EGLint openGLVersionRequested = 3; 
EGLint contextAttribs[] = {
    EGL_CONTEXT_CLIENT_VERSION,
    openGLVersionRequested,      // selects OpenGL ES 3.0, set to 2 to select OpenGL ES 2.0
    EGL_NONE
};
context = eglCreateContext(display, config, NULL, contextAttribs);
if (eglMakeCurrent(display, surface, surface, context) == EGL_FALSE) {
    LOGW("Unable to eglMakeCurrent");
    return -1;
}

can't compile gles 30 on nexus 6 (and similar devices)

1 Answers1