Bitwise operations without operators for glsl.

BitwiseOperations.glsl

// BitwiseOperations.glsl

const int BIT_COUNT = 8;

int modi(int x, int y) {
    return x - y * (x / y);
}

int or(int a, int b) {
    int result = 0;
    int n = 1;

    for(int i = 0; i < BIT_COUNT; i++) {
        if ((modi(a, 2) == 1) || (modi(b, 2) == 1)) {
            result += n;
        }
        a = a / 2;
        b = b / 2;
        n = n * 2;
        if(!(a > 0 || b > 0)) {
            break;
        }
    }
    return result;
}

int and(int a, int b) {
    int result = 0;
    int n = 1;

    for(int i = 0; i < BIT_COUNT; i++) {
        if ((modi(a, 2) == 1) && (modi(b, 2) == 1)) {
            result += n;
        }

        a = a / 2;
        b = b / 2;
        n = n * 2;

        if(!(a > 0 && b > 0)) {
            break;
        }
    }
    return result;
}

int not(int a) {
    int result = 0;
    int n = 1;
    
    for(int i = 0; i < BIT_COUNT; i++) {
        if (modi(a, 2) == 0) {
            result += n;    
        }
        a = a / 2;
        n = n * 2;
    }
    return result;
}