OpenGL ES 3.0 and newer on android

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About the multisampling issue I’m facing, just in case anyone can help me with that.

in GLRenderer.setReadDrawBuffers methid, last section

            .......
            } else {
                RenderBuffer rb = fb.getColorBuffer(fb.getTargetIndex());
                // select this draw buffer
                if (context.boundDrawBuf != rb.getSlot()) {
                    if(gl2!=null) {
                        gl2.glDrawBuffer(GLFbo.GL_COLOR_ATTACHMENT0_EXT + rb.getSlot());
                    } else {
                        gles30.glDrawBuffer(GLFbo.GL_COLOR_ATTACHMENT0_EXT + rb.getSlot());
                    }
                    context.boundDrawBuf = rb.getSlot();
                }
            }
            .......

As there’s no glDrawBuffer in GLES but glDrawBuffers exists (glDrawBuffers - OpenGL ES 3 Reference Pages) and does the same work so I’m wrapping it this way:

public void glDrawBuffer(int mode) {
    tmpBuff.clear();
    tmpBuff.put(0, mode);
    tmpBuff.rewind();
    glDrawBuffers(tmpBuff);
}

public void glDrawBuffers(IntBuffer bufs) {
    GLES30.glDrawBuffers(bufs.limit(), bufs);
}

Depending on the framebuffer his call is returning a GL_INVALID_ENUM which according to the documentation linked: " GL_INVALID_ENUM is generated if one of the values in bufs is not an accepted value."

I’ve check that the color attachment is in the valid range ( < MAX_COLOR_ATTACHMENTS ) for all cases but I’ve not found any reason for that.

In adition to that, the call to glBlitFramebuffer (glBlitFramebuffer - OpenGL ES 3 Reference Pages) at GLRenderer.copyFrameBuffer is returning GL_INVALID_OPERATION error and capturing with renderdoc, it finds the error “glblitframebuffer color attachment must have identical formats when resolving” which I also don’t know how to address.

Thanks