847eb6c48e
Fixed issue where alpha not being set correctly in canvas spriteBatch Fixed issue where previous stage events did not get removed correctly
332 lines
12 KiB
HTML
332 lines
12 KiB
HTML
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<h1 class="file-heading">File: src/pixi/renderers/webgl/shaders/PixiFastShader.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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* @author Richard Davey http://www.photonstorm.com @photonstorm
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*/
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/**
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* @class PIXI.PixiFastShader
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* @constructor
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*/
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PIXI.PixiFastShader = function(gl)
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{
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this.gl = gl;
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/**
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* @property {any} program - The WebGL program.
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*/
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this.program = null;
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/**
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* @property {array} fragmentSrc - The fragment shader.
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*/
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this.fragmentSrc = [
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'precision lowp float;',
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'varying vec2 vTextureCoord;',
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'varying float vColor;',
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'uniform sampler2D uSampler;',
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'void main(void) {',
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' gl_FragColor = texture2D(uSampler, vTextureCoord) * vColor ;',
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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 aPositionCoord;',
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'attribute vec2 aScale;',
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'attribute float aRotation;',
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'attribute vec2 aTextureCoord;',
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'attribute float aColor;',
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'uniform vec2 projectionVector;',
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'uniform vec2 offsetVector;',
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'uniform mat3 uMatrix;',
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'varying vec2 vTextureCoord;',
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'varying float vColor;',
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'const vec2 center = vec2(-1.0, 1.0);',
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'void main(void) {',
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' vec2 v;',
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' vec2 sv = aVertexPosition * aScale;',
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' v.x = (sv.x) * cos(aRotation) - (sv.y) * sin(aRotation);',
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' v.y = (sv.x) * sin(aRotation) + (sv.y) * cos(aRotation);',
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' v = ( uMatrix * vec3(v + aPositionCoord , 1.0) ).xy ;',
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' gl_Position = vec4( ( v / projectionVector) + center , 0.0, 1.0);',
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' vTextureCoord = aTextureCoord;',
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// ' vec3 color = mod(vec3(aColor.y/65536.0, aColor.y/256.0, aColor.y), 256.0) / 256.0;',
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' vColor = aColor;',
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'}'
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];
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/**
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* @property {number} textureCount - A local texture counter for multi-texture shaders.
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*/
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this.textureCount = 0;
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this.init();
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};
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/**
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* @method PIXI.PixiFastShader#init
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*/
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PIXI.PixiFastShader.prototype.init = function()
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{
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var gl = this.gl;
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var program = PIXI.compileProgram(gl, this.vertexSrc, this.fragmentSrc);
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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.dimensions = gl.getUniformLocation(program, 'dimensions');
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this.uMatrix = gl.getUniformLocation(program, 'uMatrix');
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// get and store the attributes
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this.aVertexPosition = gl.getAttribLocation(program, 'aVertexPosition');
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this.aPositionCoord = gl.getAttribLocation(program, 'aPositionCoord');
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this.aScale = gl.getAttribLocation(program, 'aScale');
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this.aRotation = gl.getAttribLocation(program, 'aRotation');
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this.aTextureCoord = gl.getAttribLocation(program, 'aTextureCoord');
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this.colorAttribute = gl.getAttribLocation(program, 'aColor');
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// Begin worst hack eva //
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// WHY??? ONLY on my chrome pixel the line above returns -1 when using filters?
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// maybe its somthing to do with the current state of the gl context.
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// Im convinced this is a bug in the chrome browser as there is NO reason why this should be returning -1 especially as it only manifests on my chrome pixel
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// If theres any webGL people that know why could happen please help :)
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if(this.colorAttribute === -1)
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{
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this.colorAttribute = 2;
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}
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this.attributes = [this.aVertexPosition, this.aPositionCoord, this.aScale, this.aRotation, this.aTextureCoord, this.colorAttribute];
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// End worst hack eva //
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this.program = program;
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};
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PIXI.PixiFastShader.prototype.destroy = function()
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{
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this.gl.deleteProgram( this.program );
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this.uniforms = null;
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this.gl = null;
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this.attributes = null;
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};
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</pre>
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