glUniform1i(int, Bool) vs. glUniform1i(int, int)

Question

I'm trying to port some OpenGLES code from iOS to Android.

In iOS I have this code:

- (void)setColorOn:(BOOL)yes
{
    glUniform1i(colorOnUniform, yes);
}

where the glUniform1i() method takes an Integer as a Uniform location and a Boolean.

In Android, the closest I can get is this:

public void setColorOn() {
        GLES20.glUniform1i(colorOnUniform, 0);
}

where the glUniform1i() method takes an Integer as a Uniform location and another Integer, I think as a texture id...

I've dug around the Kronos documentation, but can't seem to find a proper translation ...

Thoughts ?

Answer 1

Wait what? The glUniform1i takes 2 integers in both cases. Why the developer inserted a boolean value I have no idea. Anyway the iOS boolean value translates as YES(true) = 1 and NO(false) = 0. This value is probably used in shader as if(colorOnUniform == 0)...; else...;

This method should probably be like:

- (void)setColorOn:(BOOL)yes
{
    glUniform1i(colorOnUniform, yes?1:0);
}

Issue resolved...