function defaultValue(type, size) {
    switch (type) {
        case 'float':
            return 0;
        case 'vec2':
            return new Float32Array(2 * size);
        case 'vec3':
            return new Float32Array(3 * size);
        case 'vec4':
            return new Float32Array(4 * size);
        case 'int':
        case 'uint':
        case 'sampler2D':
        case 'sampler2DArray':
            return 0;
        case 'ivec2':
            return new Int32Array(2 * size);
        case 'ivec3':
            return new Int32Array(3 * size);
        case 'ivec4':
            return new Int32Array(4 * size);
        case 'uvec2':
            return new Uint32Array(2 * size);
        case 'uvec3':
            return new Uint32Array(3 * size);
        case 'uvec4':
            return new Uint32Array(4 * size);
        case 'bool':
            return false;
        case 'bvec2':
            return booleanArray(2 * size);
        case 'bvec3':
            return booleanArray(3 * size);
        case 'bvec4':
            return booleanArray(4 * size);
        case 'mat2':
            return new Float32Array([1, 0,
                0, 1]);
        case 'mat3':
            return new Float32Array([1, 0, 0,
                0, 1, 0,
                0, 0, 1]);
        case 'mat4':
            return new Float32Array([1, 0, 0, 0,
                0, 1, 0, 0,
                0, 0, 1, 0,
                0, 0, 0, 1]);
    }
    return null;
}
@method defaultValue
@memberof PIXI.glCore.shader
@param {string} type - Type of value
@param {number} size
@private