OpenGL ES extensions - NDK versus Java

[matt]

When I run glGetString(GL_EXTENSIONS) in my NDK code, I get a list of 38 extensions. If I switch to Java and run GLES32.glGetString(GLES32.GL_EXTENSIONS), I get a list of 74 extensions.

I assume the problem is that my application links to libGLESv3.so, which doesn't provide features beyond OpenGL ES 3.0. It would be nice if the NDK provided libGLESv32.so, but I can't find one.

Is there any way to access those extra extensions in an NDK application?

I've heard I should link to GLESv2 instead of GLESv3, but when I do that, I get a bunch of undefined references (glMapBufferRange, glBindVertexArray, and so on).

[Joshua Zhu]

Try use glGetStringi()

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[matt]

You're right. glGetStringi returns a different set of extensions than glGetString(GL_EXTENSIONS). Thank you! 

On Thursday, January 12, 2017 at 11:17:48 AM UTC-5, Joshua Zhu wrote:

Try use glGetStringi()

2017-01-12 1:45 GMT+08:00 matt <matt...@gmail.com>:

When I run glGetString(GL_EXTENSIONS) in my NDK code, I get a list of 38 extensions. If I switch to Java and run GLES32.glGetString(GLES32.GL_EXTENSIONS), I get a list of 74 extensions.

I assume the problem is that my application links to libGLESv3.so, which doesn't provide features beyond OpenGL ES 3.0. It would be nice if the NDK provided libGLESv32.so, but I can't find one.

Is there any way to access those extra extensions in an NDK application?

I've heard I should link to GLESv2 instead of GLESv3, but when I do that, I get a bunch of undefined references (glMapBufferRange, glBindVertexArray, and so on).

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[Dan Albert]

For anyone else landing here, this was discussed on https://github.com/android-ndk/ndk/issues/279

The reason for the difference in output is that __android_log_print truncates to 1KiB/line.

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[Joshua Zhu]

Thanks, __android_log_print is the root cause.

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