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