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pixi.js/docs/files/src_pixi_renderers_webgl_shaders_StripShader.js.html
Mat Groves 847eb6c48e Docs updated 
Fixed issue where alpha not being set correctly in canvas spriteBatch
Fixed issue where previous stage events did not get removed correctly
2014-01-28 00:08:50 +00:00

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<h1 class="file-heading">File: src/pixi/renderers/webgl/shaders/StripShader.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
PIXI.StripShader = function()
{
// the webGL program..
this.program = null;
this.fragmentSrc = [
&#x27;precision mediump float;&#x27;,
&#x27;varying vec2 vTextureCoord;&#x27;,
&#x27;varying float vColor;&#x27;,
&#x27;uniform float alpha;&#x27;,
&#x27;uniform sampler2D uSampler;&#x27;,
&#x27;void main(void) {&#x27;,
&#x27; gl_FragColor = texture2D(uSampler, vec2(vTextureCoord.x, vTextureCoord.y));&#x27;,
&#x27; gl_FragColor = gl_FragColor * alpha;&#x27;,
&#x27;}&#x27;
];
this.vertexSrc = [
&#x27;attribute vec2 aVertexPosition;&#x27;,
&#x27;attribute vec2 aTextureCoord;&#x27;,
&#x27;attribute float aColor;&#x27;,
&#x27;uniform mat3 translationMatrix;&#x27;,
&#x27;uniform vec2 projectionVector;&#x27;,
&#x27;varying vec2 vTextureCoord;&#x27;,
&#x27;uniform vec2 offsetVector;&#x27;,
&#x27;varying float vColor;&#x27;,
&#x27;void main(void) {&#x27;,
&#x27; vec3 v = translationMatrix * vec3(aVertexPosition, 1.0);&#x27;,
&#x27; v -= offsetVector.xyx;&#x27;,
&#x27; gl_Position = vec4( v.x / projectionVector.x -1.0, v.y / projectionVector.y + 1.0 , 0.0, 1.0);&#x27;,
&#x27; vTextureCoord = aTextureCoord;&#x27;,
&#x27; vColor = aColor;&#x27;,
&#x27;}&#x27;
];
};
PIXI.StripShader.prototype.init = function()
{
var gl = PIXI.gl;
var program = PIXI.compileProgram(gl, this.vertexSrc, this.fragmentSrc);
gl.useProgram(program);
// get and store the uniforms for the shader
this.uSampler = gl.getUniformLocation(program, &#x27;uSampler&#x27;);
this.projectionVector = gl.getUniformLocation(program, &#x27;projectionVector&#x27;);
this.offsetVector = gl.getUniformLocation(program, &#x27;offsetVector&#x27;);
this.colorAttribute = gl.getAttribLocation(program, &#x27;aColor&#x27;);
//this.dimensions = gl.getUniformLocation(this.program, &#x27;dimensions&#x27;);
// get and store the attributes
this.aVertexPosition = gl.getAttribLocation(program, &#x27;aVertexPosition&#x27;);
this.aTextureCoord = gl.getAttribLocation(program, &#x27;aTextureCoord&#x27;);
this.translationMatrix = gl.getUniformLocation(program, &#x27;translationMatrix&#x27;);
this.alpha = gl.getUniformLocation(program, &#x27;alpha&#x27;);
this.program = program;
};
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