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<h1 class="file-heading">File: src/pixi/renderers/webgl/shaders/ComplexPrimitiveShader.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* @class ComplexPrimitiveShader
* @constructor
* @param gl {WebGLContext} the current WebGL drawing context
*/
PIXI.ComplexPrimitiveShader = function(gl)
{
/**
* @property _UID
* @type Number
* @private
*/
this._UID = PIXI._UID++;
/**
* @property gl
* @type WebGLContext
*/
this.gl = gl;
/**
* The WebGL program.
* @property program
* @type {Any}
*/
this.program = null;
/**
* The fragment shader.
* @property fragmentSrc
* @type Array
*/
this.fragmentSrc = [
'precision mediump float;',
'varying vec4 vColor;',
'void main(void) {',
' gl_FragColor = vColor;',
'}'
];
/**
* The vertex shader.
* @property vertexSrc
* @type Array
*/
this.vertexSrc = [
'attribute vec2 aVertexPosition;',
//'attribute vec4 aColor;',
'uniform mat3 translationMatrix;',
'uniform vec2 projectionVector;',
'uniform vec2 offsetVector;',
'uniform vec3 tint;',
'uniform float alpha;',
'uniform vec3 color;',
'varying vec4 vColor;',
'void main(void) {',
' vec3 v = translationMatrix * vec3(aVertexPosition , 1.0);',
' v -= offsetVector.xyx;',
' gl_Position = vec4( v.x / projectionVector.x -1.0, v.y / -projectionVector.y + 1.0 , 0.0, 1.0);',
' vColor = vec4(color * alpha * tint, alpha);',//" * vec4(tint * alpha, alpha);',
'}'
];
this.init();
};
PIXI.ComplexPrimitiveShader.prototype.constructor = PIXI.ComplexPrimitiveShader;
/**
* Initialises the shader.
*
* @method init
*/
PIXI.ComplexPrimitiveShader.prototype.init = function()
{
var gl = this.gl;
var program = PIXI.compileProgram(gl, this.vertexSrc, this.fragmentSrc);
gl.useProgram(program);
// get and store the uniforms for the shader
this.projectionVector = gl.getUniformLocation(program, 'projectionVector');
this.offsetVector = gl.getUniformLocation(program, 'offsetVector');
this.tintColor = gl.getUniformLocation(program, 'tint');
this.color = gl.getUniformLocation(program, 'color');
// get and store the attributes
this.aVertexPosition = gl.getAttribLocation(program, 'aVertexPosition');
// this.colorAttribute = gl.getAttribLocation(program, 'aColor');
this.attributes = [this.aVertexPosition, this.colorAttribute];
this.translationMatrix = gl.getUniformLocation(program, 'translationMatrix');
this.alpha = gl.getUniformLocation(program, 'alpha');
this.program = program;
};
/**
* Destroys the shader.
*
* @method destroy
*/
PIXI.ComplexPrimitiveShader.prototype.destroy = function()
{
this.gl.deleteProgram( this.program );
this.uniforms = null;
this.gl = null;
this.attribute = null;
};
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