webgl-info.html (8105B)
1 <!-- 2 Copyright (c) 2019 The Khronos Group Inc. 3 Use of this source code is governed by an MIT-style license that can be 4 found in the LICENSE.txt file. 5 --> 6 7 <!DOCTYPE html> 8 <html> 9 <head> 10 <meta charset="utf-8"> 11 <title>WebGL Information</title> 12 <style type="text/css"> 13 th, td { 14 padding: 4pt; 15 } 16 th { 17 text-align: right; 18 min-width: 22em; 19 } 20 </style> 21 <script src="../js/webgl-test-utils.js"> </script> 22 <script> 23 "use strict"; 24 window.onload = main; 25 26 function createCell(txt, isTh) { 27 var str = txt.toString(); 28 if (typeof txt != 'string') { 29 if (txt.length !== undefined) { 30 str = ""; 31 for (var ii = 0; ii < txt.length; ++ii) { 32 str += (ii == 0 ? "" : ", ") + txt[ii]; 33 } 34 } 35 } 36 var t = document.createTextNode(str); 37 var d = document.createElement("div"); 38 var td; 39 if (isTh) { 40 td = document.createElement("th"); 41 } else { 42 td = document.createElement("td"); 43 } 44 d.appendChild(t); 45 td.appendChild(d); 46 return td; 47 } 48 49 function createRow(values) { 50 var tr = document.createElement("tr"); 51 for (var i = 0; i < values.length; ++i) { 52 var td = createCell(values[i], i == 0); 53 tr.appendChild(td); 54 } 55 return tr; 56 } 57 58 function main() { 59 var wtu = WebGLTestUtils; 60 61 var canvas = document.getElementById("example"); 62 var gl = wtu.create3DContext(canvas); 63 if (!gl) { 64 return; 65 } 66 67 var debugRendererInfoRows = function() { 68 var rows = []; 69 var debugExt = wtu.getExtensionWithKnownPrefixes(gl, 'WEBGL_debug_renderer_info'); 70 if (debugExt) { 71 var extPnames = [ 72 'UNMASKED_VENDOR_WEBGL', 73 'UNMASKED_RENDERER_WEBGL' 74 ]; 75 for (var ii = 0; ii < extPnames.length; ++ii) { 76 var pname = extPnames[ii]; 77 var value = gl.getParameter(debugExt[pname]); 78 rows.push([pname, value]); 79 } 80 } 81 return rows; 82 }; 83 84 var precisionRows = function() { 85 var rows = []; 86 87 var addPrecisionRow = function(shaderType, precision) { 88 var typeStr = shaderType === gl.FRAGMENT_SHADER ? 'fragment' : 'vertex'; 89 var precisionStr = 'highp'; 90 if (precision == gl.MEDIUM_FLOAT) { 91 precisionStr = 'mediump'; 92 } else if (precision == gl.LOW_FLOAT) { 93 precisionStr = 'lowp'; 94 } 95 rows.push([typeStr + ' shader ' + precisionStr + ' float', gl.getShaderPrecisionFormat(shaderType, precision).precision + ' mantissa bits']); 96 }; 97 98 var fSource = 'precision highp float; uniform float r; void main() { gl_FragColor = vec4(r, 0.0, 0.0, 1.0); }' 99 var f = wtu.loadShader(gl, fSource, gl.FRAGMENT_SHADER); 100 if (!f) { 101 rows.push(['fragment shader highp float', 'not supported']); 102 } else { 103 addPrecisionRow(gl.FRAGMENT_SHADER, gl.HIGH_FLOAT); 104 } 105 addPrecisionRow(gl.FRAGMENT_SHADER, gl.MEDIUM_FLOAT); 106 addPrecisionRow(gl.FRAGMENT_SHADER, gl.LOW_FLOAT); 107 addPrecisionRow(gl.VERTEX_SHADER, gl.HIGH_FLOAT); 108 addPrecisionRow(gl.VERTEX_SHADER, gl.MEDIUM_FLOAT); 109 addPrecisionRow(gl.VERTEX_SHADER, gl.LOW_FLOAT); 110 return rows; 111 }; 112 113 var renderTargetRows = function() { 114 var rows = []; 115 var oesTextureFloat = wtu.getExtensionWithKnownPrefixes(gl, 'OES_texture_float'); 116 var oesTextureHalfFloat = wtu.getExtensionWithKnownPrefixes(gl, 'OES_texture_half_float'); 117 var formatsToTest = [ 118 { 119 description: 'RGBA UNSIGNED_BYTE', 120 format: gl.RGBA, 121 type: gl.UNSIGNED_BYTE 122 }, 123 { 124 description: 'RGB UNSIGNED_BYTE', 125 format: gl.RGB, 126 type: gl.UNSIGNED_BYTE 127 } 128 ]; 129 if (oesTextureFloat) { 130 formatsToTest.push({ 131 description: 'RGBA FLOAT', 132 format: gl.RGBA, 133 type: gl.FLOAT 134 }); 135 formatsToTest.push({ 136 description: 'RGB FLOAT (deprecated)', 137 format: gl.RGB, 138 type: gl.FLOAT 139 }); 140 } 141 if (oesTextureHalfFloat) { 142 formatsToTest.push({ 143 description: 'RGBA HALF_FLOAT_OES', 144 format: gl.RGBA, 145 type: oesTextureHalfFloat.HALF_FLOAT_OES 146 }); 147 formatsToTest.push({ 148 description: 'RGB HALF_FLOAT_OES', 149 format: gl.RGB, 150 type: oesTextureHalfFloat.HALF_FLOAT_OES 151 }); 152 } 153 for (var ii = 0; ii < formatsToTest.length; ++ii) { 154 var fb = gl.createFramebuffer(); 155 gl.bindFramebuffer(gl.FRAMEBUFFER, fb); 156 var format = formatsToTest[ii]; 157 var tex = gl.createTexture(); 158 gl.bindTexture(gl.TEXTURE_2D, tex); 159 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); 160 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); 161 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); 162 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); 163 gl.texImage2D(gl.TEXTURE_2D, 0, format.format, 256, 256, 0, format.format, format.type, null); 164 gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0); 165 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) { 166 rows.push([format.description, 'supported']); 167 } else { 168 rows.push([format.description, 'not supported']); 169 } 170 gl.deleteFramebuffer(fb); 171 gl.deleteTexture(tex); 172 } 173 return rows; 174 }; 175 176 var info = [ 177 { 178 title: 'Renderer', 179 pnames: [ 180 'VERSION', 181 'VENDOR', 182 'RENDERER' 183 ], 184 genRows: debugRendererInfoRows 185 }, 186 { 187 title: 'Textures and Viewport', 188 pnames: [ 189 'MAX_TEXTURE_SIZE', 190 'MAX_CUBE_MAP_TEXTURE_SIZE', 191 'MAX_RENDERBUFFER_SIZE', 192 'MAX_VIEWPORT_DIMS' 193 ] 194 }, 195 { 196 title: 'Shader Variables', 197 pnames: [ 198 'MAX_VARYING_VECTORS', 199 'MAX_VERTEX_ATTRIBS', 200 'MAX_VERTEX_UNIFORM_VECTORS', 201 'MAX_FRAGMENT_UNIFORM_VECTORS', 202 'MAX_VERTEX_TEXTURE_IMAGE_UNITS', 203 'MAX_TEXTURE_IMAGE_UNITS', 204 'MAX_COMBINED_TEXTURE_IMAGE_UNITS' 205 ] 206 }, 207 { 208 title: 'Shader Precision', 209 genRows: precisionRows 210 }, 211 { 212 title: 'Framebuffer Texture Attachment Support', 213 genRows: renderTargetRows 214 } 215 ]; 216 217 // TODO: max anisotropy, framebuffer depth bits, MSAA samples, max multiple render targets buffers, point size, line width 218 219 for (var jj = 0; jj < info.length; ++jj) { 220 var table = document.createElement("table"); 221 var tb = document.createElement("tbody"); 222 if (info[jj].pnames) { 223 var pnames = info[jj].pnames; 224 for (var ii = 0; ii < pnames.length; ++ii) { 225 var pname = pnames[ii]; 226 var value = gl.getParameter(gl[pname]); 227 tb.appendChild(createRow([pname, value])); 228 } 229 } 230 if (info[jj].genRows) { 231 var genRows = info[jj].genRows(); 232 for (var ii = 0; ii < genRows.length; ++ii) { 233 tb.appendChild(createRow(genRows[ii])); 234 } 235 } 236 table.appendChild(tb); 237 var header = document.createElement("h2"); 238 header.textContent = info[jj].title; 239 document.getElementById("info").appendChild(header); 240 document.getElementById("info").appendChild(table); 241 } 242 var extensionList = document.createElement('ul'); 243 var exts = gl.getSupportedExtensions(); 244 var extsWithPrefixes = []; 245 while (exts.length > 0) { 246 var prefixedNames = wtu.getExtensionPrefixedNames(exts[0]); 247 var supportedPrefixedNames = []; 248 for (var ii = 0; ii < prefixedNames.length; ++ii) { 249 var index = exts.indexOf(prefixedNames[ii]); 250 if (index >= 0) { 251 supportedPrefixedNames.push(exts[index]); 252 exts.splice(index, 1); 253 } 254 } 255 extsWithPrefixes.push(supportedPrefixedNames.join(" / ")); 256 } 257 extsWithPrefixes.sort(); 258 for (var ii = 0; ii < extsWithPrefixes.length; ++ii) { 259 var li = document.createElement('li'); 260 li.appendChild(document.createTextNode(extsWithPrefixes[ii])); 261 extensionList.appendChild(li); 262 } 263 document.getElementById('extensions').appendChild(extensionList); 264 } 265 </script> 266 </head> 267 <body> 268 <h1>WebGL Info</h1> 269 <div id="info"></div> 270 <h2>WebGL Extensions</h2> 271 <div id="extensions"></div> 272 <canvas id="example" width="256" height="16" style="width: 256px; height: 48px;"></canvas> 273 </body> 274 </html>