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<h1 class="file-heading">File: src/pixi/renderers/webgl/utils/WebGLShaderManager.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* @class WebGLShaderManager
* @constructor
* @private
*/
PIXI.WebGLShaderManager = function()
{
/**
* @property maxAttibs
* @type Number
*/
this.maxAttibs = 10;
/**
* @property attribState
* @type Array
*/
this.attribState = [];
/**
* @property tempAttribState
* @type Array
*/
this.tempAttribState = [];
for (var i = 0; i < this.maxAttibs; i++)
{
this.attribState[i] = false;
}
/**
* @property stack
* @type Array
*/
this.stack = [];
};
PIXI.WebGLShaderManager.prototype.constructor = PIXI.WebGLShaderManager;
/**
* Initialises the context and the properties.
*
* @method setContext
* @param gl {WebGLContext} the current WebGL drawing context
*/
PIXI.WebGLShaderManager.prototype.setContext = function(gl)
{
this.gl = gl;
// the next one is used for rendering primitives
this.primitiveShader = new PIXI.PrimitiveShader(gl);
// the next one is used for rendering triangle strips
this.complexPrimitiveShader = new PIXI.ComplexPrimitiveShader(gl);
// this shader is used for the default sprite rendering
this.defaultShader = new PIXI.PixiShader(gl);
// this shader is used for the fast sprite rendering
this.fastShader = new PIXI.PixiFastShader(gl);
// the next one is used for rendering triangle strips
this.stripShader = new PIXI.StripShader(gl);
this.setShader(this.defaultShader);
};
/**
* Takes the attributes given in parameters.
*
* @method setAttribs
* @param attribs {Array} attribs
*/
PIXI.WebGLShaderManager.prototype.setAttribs = function(attribs)
{
// reset temp state
var i;
for (i = 0; i < this.tempAttribState.length; i++)
{
this.tempAttribState[i] = false;
}
// set the new attribs
for (i = 0; i < attribs.length; i++)
{
var attribId = attribs[i];
this.tempAttribState[attribId] = true;
}
var gl = this.gl;
for (i = 0; i < this.attribState.length; i++)
{
if(this.attribState[i] !== this.tempAttribState[i])
{
this.attribState[i] = this.tempAttribState[i];
if(this.tempAttribState[i])
{
gl.enableVertexAttribArray(i);
}
else
{
gl.disableVertexAttribArray(i);
}
}
}
};
/**
* Sets the current shader.
*
* @method setShader
* @param shader {Any}
*/
PIXI.WebGLShaderManager.prototype.setShader = function(shader)
{
if(this._currentId === shader._UID)return false;
this._currentId = shader._UID;
this.currentShader = shader;
this.gl.useProgram(shader.program);
this.setAttribs(shader.attributes);
return true;
};
/**
* Destroys this object.
*
* @method destroy
*/
PIXI.WebGLShaderManager.prototype.destroy = function()
{
this.attribState = null;
this.tempAttribState = null;
this.primitiveShader.destroy();
this.complexPrimitiveShader.destroy();
this.defaultShader.destroy();
this.fastShader.destroy();
this.stripShader.destroy();
this.gl = null;
};
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