PixiJS

Source: dependencies/pixi-gl-core/shader/generateUniformAccessObject.js

dependencies/pixi-gl-core/shader/generateUniformAccessObject.js

  1. /**
  2.  * Extracts the attributes
  3.  * @class
  4.  * @memberof PIXI.glCore.shader
  5.  * @param gl {WebGLRenderingContext} The current WebGL rendering context
  6.  * @param uniforms {Array} @mat ?
  7.  * @return attributes {Object}
  8.  */
  9. var generateUniformAccessObject = function(gl, uniformData)
  10. {
  11.     // this is the object we will be sending back.
  12.     // an object hierachy will be created for structs
  13.     var uniforms = {data:{}};
  15.     uniforms.gl = gl;
  17.     var uniformKeys= Object.keys(uniformData);
  19.     for (var i = 0; i < uniformKeys.length; i++)
  20.     {
  21.         var fullName = uniformKeys[i];
  23.         var nameTokens = fullName.split('.');
  24.         var name = nameTokens[nameTokens.length - 1];
  27.         var uniformGroup = getUniformGroup(nameTokens, uniforms);
  29.         var uniform =  uniformData[fullName];
  30.         uniformGroup.data[name] = uniform;
  32.         uniformGroup.gl = gl;
  34.         Object.defineProperty(uniformGroup, name, {
  35.             get: generateGetter(name),
  36.             set: generateSetter(name, uniform)
  37.         });
  38.     }
  40.     return uniforms;
  41. };
  43. var generateGetter = function(name)
  44. {
  45.     return function() {
  46.         return this.data[name].value;
  47.     };
  48. };
  50. var GLSL_SINGLE_SETTERS = {
  51.     float: function setSingleFloat(gl, location, value) { gl.uniform1f(location, value); },
  52.     vec2: function setSingleVec2(gl, location, value) { gl.uniform2f(location, value[0], value[1]); },
  53.     vec3: function setSingleVec3(gl, location, value) { gl.uniform3f(location, value[0], value[1], value[2]); },
  54.     vec4: function setSingleVec4(gl, location, value) { gl.uniform4f(location, value[0], value[1], value[2], value[3]); },
  56.     int: function setSingleInt(gl, location, value) { gl.uniform1i(location, value); },
  57.     ivec2: function setSingleIvec2(gl, location, value) { gl.uniform2i(location, value[0], value[1]); },
  58.     ivec3: function setSingleIvec3(gl, location, value) { gl.uniform3i(location, value[0], value[1], value[2]); },
  59.     ivec4: function setSingleIvec4(gl, location, value) { gl.uniform4i(location, value[0], value[1], value[2], value[3]); },
  61.     bool: function setSingleBool(gl, location, value) { gl.uniform1i(location, value); },
  62.     bvec2: function setSingleBvec2(gl, location, value) { gl.uniform2i(location, value[0], value[1]); },
  63.     bvec3: function setSingleBvec3(gl, location, value) { gl.uniform3i(location, value[0], value[1], value[2]); },
  64.     bvec4: function setSingleBvec4(gl, location, value) { gl.uniform4i(location, value[0], value[1], value[2], value[3]); },
  66.     mat2: function setSingleMat2(gl, location, value) { gl.uniformMatrix2fv(location, false, value); },
  67.     mat3: function setSingleMat3(gl, location, value) { gl.uniformMatrix3fv(location, false, value); },
  68.     mat4: function setSingleMat4(gl, location, value) { gl.uniformMatrix4fv(location, false, value); },
  70.     sampler2D: function setSingleSampler2D(gl, location, value) { gl.uniform1i(location, value); },
  71. };
  73. var GLSL_ARRAY_SETTERS = {
  74.     float: function setFloatArray(gl, location, value) { gl.uniform1fv(location, value); },
  75.     vec2: function setVec2Array(gl, location, value) { gl.uniform2fv(location, value); },
  76.     vec3: function setVec3Array(gl, location, value) { gl.uniform3fv(location, value); },
  77.     vec4: function setVec4Array(gl, location, value) { gl.uniform4fv(location, value); },
  78.     int: function setIntArray(gl, location, value) { gl.uniform1iv(location, value); },
  79.     ivec2: function setIvec2Array(gl, location, value) { gl.uniform2iv(location, value); },
  80.     ivec3: function setIvec3Array(gl, location, value) { gl.uniform3iv(location, value); },
  81.     ivec4: function setIvec4Array(gl, location, value) { gl.uniform4iv(location, value); },
  82.     bool: function setBoolArray(gl, location, value) { gl.uniform1iv(location, value); },
  83.     bvec2: function setBvec2Array(gl, location, value) { gl.uniform2iv(location, value); },
  84.     bvec3: function setBvec3Array(gl, location, value) { gl.uniform3iv(location, value); },
  85.     bvec4: function setBvec4Array(gl, location, value) { gl.uniform4iv(location, value); },
  86.     sampler2D: function setSampler2DArray(gl, location, value) { gl.uniform1iv(location, value); },
  87. };
  89. function generateSetter(name, uniform)
  90. {
  91.     return function(value) {
  92.         this.data[name].value = value;
  93.         var location = this.data[name].location;
  94.         if (uniform.size === 1)
  95.         {
  96.             GLSL_SINGLE_SETTERS[uniform.type](this.gl, location, value);
  97.         }
  98.         else
  99.         {
  100.             // glslSetArray(gl, location, type, value) {
  101.             GLSL_ARRAY_SETTERS[uniform.type](this.gl, location, value);
  102.         }
  103.     };
  104. }
  106. function getUniformGroup(nameTokens, uniform)
  107. {
  108.     var cur = uniform;
  110.     for (var i = 0; i < nameTokens.length - 1; i++)
  111.     {
  112.         var o = cur[nameTokens[i]] || {data:{}};
  113.         cur[nameTokens[i]] = o;
  114.         cur = o;
  115.     }
  117.     return cur;
  118. }
  121. module.exports = generateUniformAccessObject;