/
WebGLShaderUtils.js
95 lines (82 loc) · 2.12 KB
/
WebGLShaderUtils.js
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/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* @method PIXI.initDefaultShaders
* @static
* @private
*/
PIXI.initDefaultShaders = function ()
{
};
/**
* @method PIXI.CompileVertexShader
* @static
* @param gl {WebGLContext} the current WebGL drawing context
* @param shaderSrc {Array}
* @return {Any}
*/
PIXI.CompileVertexShader = function (gl, shaderSrc)
{
return PIXI._CompileShader(gl, shaderSrc, gl.VERTEX_SHADER);
};
/**
* @method PIXI.CompileFragmentShader
* @static
* @param gl {WebGLContext} the current WebGL drawing context
* @param shaderSrc {Array}
* @return {Any}
*/
PIXI.CompileFragmentShader = function (gl, shaderSrc)
{
return PIXI._CompileShader(gl, shaderSrc, gl.FRAGMENT_SHADER);
};
/**
* @method PIXI._CompileShader
* @static
* @private
* @param gl {WebGLContext} the current WebGL drawing context
* @param shaderSrc {Array}
* @param shaderType {Number}
* @return {Any}
*/
PIXI._CompileShader = function (gl, shaderSrc, shaderType)
{
var src = shaderSrc;
if (Array.isArray(shaderSrc))
{
src = shaderSrc.join('\n');
}
var shader = gl.createShader(shaderType);
gl.shaderSource(shader, src);
gl.compileShader(shader);
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS))
{
window.console.log(gl.getShaderInfoLog(shader));
return null;
}
return shader;
};
/**
* @method PIXI.compileProgram
* @static
* @param gl {WebGLContext} the current WebGL drawing context
* @param vertexSrc {Array}
* @param fragmentSrc {Array}
* @return {Any}
*/
PIXI.compileProgram = function (gl, vertexSrc, fragmentSrc)
{
var fragmentShader = PIXI.CompileFragmentShader(gl, fragmentSrc);
var vertexShader = PIXI.CompileVertexShader(gl, vertexSrc);
var shaderProgram = gl.createProgram();
gl.attachShader(shaderProgram, vertexShader);
gl.attachShader(shaderProgram, fragmentShader);
gl.linkProgram(shaderProgram);
if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS))
{
window.console.log(gl.getProgramInfoLog(shaderProgram));
window.console.log('Could not initialise shaders');
}
return shaderProgram;
};