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c++opengl-esandroid-ndkegl

How do I create an OpenGL ES 2 context in a native activity?

For the life of me, I cannot find any good pure Android NDK examples for OpenGL ES 2. The one included native-activity sample project builds an ES 1 context. Are there any sample programs demonstrating the creation of an ES 2 context in pure C++?

Solution

  • Creating an OpenGL ES 2 context should be about the same than creating an OpenGL ES 1. Based on the "native-activity" sample from the NDK, you just need to add this to the attribute list passed to eglChooseConfig:

    const EGLint attribs[] =
{
    EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
    ...
    EGL_NONE
};

    This should ensure your config is ES2-compatible.

    Then pass this attribute list to eglCreateContext:

    EGLint AttribList[] = 
{
    EGL_CONTEXT_CLIENT_VERSION, 2,
    EGL_NONE
};

    with a call like this:

    context = eglCreateContext(display, config, NULL, AttribList);