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<h1 class="file-heading">File: src\render\shaders\ShaderPair.ts</h1>
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<pre class="code prettyprint linenums">
/**
*
* @module Kiwi
* @submodule Shaders
* @namespace Kiwi.Shaders
*
*/
module Kiwi.Shaders {
/**
* Base class for shader pairs which encapsulate a GLSL vertex and fragment shader
* @class ShaderPair
* @constructor
* @namespace Kiwi.Shaders
* @return {Kiwi.Shaders.ShaderPair}
*/
export class ShaderPair {
constructor() {}
/**
*
* @property RENDERER_ID
* @type string
* @public
* @static
*/
public static RENDERER_ID: string = "ShaderPair";
/**
* Initialise the shader pair.
* @method init
* @param gl {WebGLRenderingCotext}
* @public
*/
public init(gl: WebGLRenderingContext) {
this.vertShader = this.compile(gl, this.vertSource.join("\n"), gl.VERTEX_SHADER);
this.fragShader = this.compile(gl, this.fragSource.join("\n"), gl.FRAGMENT_SHADER);
this.shaderProgram = this.attach(gl, this.vertShader, this.fragShader);
this.loaded = true;
}
/**
* Returns whether the shader pair has been loaded and compiled.
* @property loaded
* @type boolean
* @public
*/
public loaded: boolean = false;
/**
* Vertex shader
* @property vertShader
* @type WebGLShader
* @public
*/
public vertShader: WebGLShader;
/**
* Fragment shader
* @property fragShader
* @type WebGLShader
* @public
*/
public fragShader: WebGLShader;
/**
* The WebGl shader program
* @property shaderProgram
* @type WebGLProgram
* @public
*/
public shaderProgram: WebGLProgram;
/**
* Attaches the shaders to the program and links them
* @method attach
* @param gl {WebGLRenderingContext}
* @param vertShader {WebGLShader}
* @param fragShader {WebGLShader}
* @return {WebGLProgram}
* @public
*/
public attach(gl: WebGLRenderingContext, vertShader: WebGLShader, fragShader: WebGLShader): WebGLProgram {
var shaderProgram: WebGLProgram = gl.createProgram();
gl.attachShader(shaderProgram, fragShader);
gl.attachShader(shaderProgram, vertShader);
gl.linkProgram(shaderProgram);
return shaderProgram;
}
/**
* Compiles the shaders
* @method compile
* @param gl {WebGLRenderingContext}
* @param src {string}
* @param shaderType {number}
* @return {WebGLShader}
* @public
*/
public compile(gl: WebGLRenderingContext, src: string, shaderType: number): WebGLShader {
var shader: WebGLShader = gl.createShader(shaderType);
gl.shaderSource(shader, src);
gl.compileShader(shader);
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
return null;
}
return shader;
}
/**
* Uniform descriptors
* @property uniforms
* @type Array
* @public
*/
public uniforms: any;
/**
* Attribute descriptors
* @property attributes
* @type Array
* @public
*/
public attributes: any;
/**
* Shader frag source (for override)
* @property texture2DFrag
* @type Array
* @public
*/
public fragSource: Array<any>;
/**
* Shader vert source (for override)
* @property texture2DVert
* @type Array
* @public
*/
public vertSource: Array<any>;
/**
* Sets a single uniform value and marks it as dirty.
* @method setParam
* @param uniformName {string}
* @param value {*}
* @public
*/
public setParam(uniformName: string, value: any) {
this.uniforms[uniformName].value = value;
this.uniforms[uniformName].dirty = true;
}
/**
* Applies all uniforms to the uploaded program
* @method applyUniforms
* @param gl {WebGLRenderingCotext}
* @public
*/
public applyUniforms(gl: WebGLRenderingContext) {
for (var u in this.uniforms) {
this.applyUniform(gl, u);
}
}
/**
* Applies a single uniforms to the uploaded program
* @method applyUniform
* @param gl {WebGLRenderingCotext}
* @param name {string}
* @public
*/
public applyUniform(gl: WebGLRenderingContext, name: string) {
var u = this.uniforms[name]
if (this.uniforms[name].dirty) {
gl["uniform" + u.type](u.location, u.value);
this.uniforms[name].dirty = false;
}
}
/**
* Initialises all uniforms
* @method initUniforms
* @param gl {WebGLRenderingCotext}
* @public
*/
public initUniforms(gl: WebGLRenderingContext) {
for (var uniformName in this.uniforms) {
var uniform = this.uniforms[uniformName];
uniform.location = gl.getUniformLocation(this.shaderProgram, uniformName);
uniform.dirty = true;
uniform.value = null;
}
}
}
}
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