src/js/widgets/components/webgl.js

   1 //>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);\r
   2 //>>description: Tizen WebGL component for gallery3d\r
   3 //>>label: WebGL\r
   4 //>>group: Tizen:Widgets:Lib\r
   5 \r
   6 define( [ ], function ( ) {\r
   7 //>>excludeEnd("jqmBuildExclude");\r
   8 \r
   9 /* ***************************************************************************\r
  10  * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.\r
  11  *\r
  12  * Permission is hereby granted, free of charge, to any person obtaining a\r
  13  * copy of this software and associated documentation files (the "Software"),\r
  14  * to deal in the Software without restriction, including without limitation\r
  15  * the rights to use, copy, modify, merge, publish, distribute, sublicense,\r
  16  * and/or sell copies of the Software, and to permit persons to whom the\r
  17  * Software is furnished to do so, subject to the following conditions:\r
  18  *\r
  19  * The above copyright notice and this permission notice shall be included in\r
  20  * all copies or substantial portions of the Software.\r
  21  *\r
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
  23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\r
  25  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\r
  26  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\r
  27  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\r
  28  * DEALINGS IN THE SOFTWARE.\r
  29  * ***************************************************************************\r
  30  *\r
  31  * Authors: Hyunsook Park <hyunsook.park@samsung.com>\r
  32  *                      Wonseop Kim <wonseop.kim@samsung.com>\r
  33 */\r
  34 \r
  35 ( function ( $, undefined ) {\r
  36         $.webgl = {};\r
  37 \r
  38         $.webgl.shader = {\r
  39                 _vertexShader: null,\r
  40                 _fragmentShader: null,\r
  41 \r
  42                 deleteShaders: function ( gl ) {\r
  43                         gl.deleteShader( this._vertexShader );\r
  44                         gl.deleteShader( this._fragmentShader );\r
  45                 },\r
  46 \r
  47                 addShaderProgram : function ( gl, vs, fs, isFile ) {\r
  48                         var shaderProgram,\r
  49                                 vertexShaderSource = {},\r
  50                                 fragmentShaderSource = {};\r
  51 \r
  52                         if ( isFile ) {\r
  53                                 vertexShaderSource = this.loadShaderFile( vs );\r
  54                                 fragmentShaderSource = this.loadShaderFile( fs );\r
  55                         } else {\r
  56                                 vertexShaderSource.source = vs;\r
  57                                 fragmentShaderSource.source = fs;\r
  58                         }\r
  59 \r
  60                         this._vertexShader = this.getShader( gl, gl.VERTEX_SHADER, vertexShaderSource );\r
  61                         this._fragmentShader = this.getShader( gl, gl.FRAGMENT_SHADER, fragmentShaderSource );\r
  62 \r
  63                         shaderProgram = gl.createProgram();\r
  64                         gl.attachShader( shaderProgram, this._vertexShader);\r
  65                         gl.attachShader( shaderProgram, this._fragmentShader);\r
  66                         gl.linkProgram( shaderProgram );\r
  67 \r
  68                         if ( !gl.getProgramParameter( shaderProgram, gl.LINK_STATUS ) ) {\r
  69                                 window.alert( "Could not initialize Shaders!" );\r
  70                         }\r
  71                         return shaderProgram;\r
  72                 },\r
  73 \r
  74                 loadShaderFile : function ( path ) {\r
  75                         var cache = null;\r
  76                         $.ajax({\r
  77                                 async : false,\r
  78                                 url : path,\r
  79                                 success : function ( result ) {\r
  80                                         cache = {\r
  81                                                 source: result\r
  82                                         };\r
  83                                 }\r
  84                         });\r
  85                         return cache;\r
  86                 },\r
  87 \r
  88                 getShader: function ( gl, type, script ) {\r
  89                         var shader;\r
  90 \r
  91                         if ( !gl || !type || !script ) {\r
  92                                 return null;\r
  93                         }\r
  94 \r
  95                         shader = gl.createShader( type );\r
  96 \r
  97                         gl.shaderSource( shader, script.source );\r
  98                         gl.compileShader( shader );\r
  99 \r
 100                         if ( !gl.getShaderParameter( shader, gl.COMPILE_STATUS ) ) {\r
 101                                 window.alert( gl.getShaderInfoLog( shader ) );\r
 102                                 gl.deleteShader( shader );\r
 103                                 return null;\r
 104                         }\r
 105                         return shader;\r
 106                 }\r
 107         };\r
 108 \r
 109         $.webgl.buffer = {\r
 110                 attribBufferData: function ( gl, attribArray ) {\r
 111                         var attribBuffer = gl.createBuffer();\r
 112 \r
 113                         gl.bindBuffer( gl.ARRAY_BUFFER, attribBuffer );\r
 114                         gl.bufferData( gl.ARRAY_BUFFER, attribArray, gl.STATIC_DRAW );\r
 115                         gl.bindBuffer( gl.ARRAY_BUFFER, null );\r
 116 \r
 117                         return attribBuffer;\r
 118                 }\r
 119         };\r
 120 \r
 121 } ( jQuery ) );\r
 122 \r
 123 //>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);\r
 124 } );\r
 125 //>>excludeEnd("jqmBuildExclude");\r