/**
 * R3.D3.Shader.Fragment
 * @param graphics R3.Runtime.Graphics
 * @param apiFragmentShader
 * @constructor
 */
R3.D3.Shader.Fragment = function(
	graphics,
	apiFragmentShader
) {

    this.graphics = graphics;
    this.graphics.isNotThreeThrow();

    if (R3.Utils.UndefinedOrNull(apiFragmentShader)) {
        apiFragmentShader = {
            shaderType : R3.D3.API.Shader.SHADER_TYPE_FRAGMENT
        };
    }

    R3.D3.API.Shader.Fragment.call(
        this,
        apiFragmentShader
    );

    R3.D3.Shader.call(
        this,
        this.graphics,
        apiFragmentShader
    );

};

R3.D3.Shader.Fragment.prototype = Object.create(R3.D3.Shader.prototype);
R3.D3.Shader.Fragment.prototype.constructor = R3.D3.Shader.Fragment;

/**
 * Creates a shader instance
 * @returns {*}
 */
R3.D3.Shader.Fragment.prototype.createInstance = function() {
    R3.D3.Shader.prototype.createInstance.call(this);
};

/**
 * Updates the instance with the current state
 */
R3.D3.Shader.Fragment.prototype.updateInstance = function(property) {
    R3.D3.Shader.prototype.updateInstance.call(this, property);
};

/**
 * Converts a R3.D3.Shader to a R3.D3.API.Shader
 * @returns {R3.D3.API.Shader}
 */
R3.D3.Shader.Fragment.prototype.toApiObject = function() {
    var apiShader = R3.D3.Shader.prototype.toApiObject.call(this);
    return apiShader;
};