4 ** Copyright (c) 2012 The Khronos Group Inc.
6 ** Permission is hereby granted, free of charge, to any person obtaining a
7 ** copy of this software and/or associated documentation files (the
8 ** "Materials"), to deal in the Materials without restriction, including
9 ** without limitation the rights to use, copy, modify, merge, publish,
10 ** distribute, sublicense, and/or sell copies of the Materials, and to
11 ** permit persons to whom the Materials are furnished to do so, subject to
12 ** the following conditions:
14 ** The above copyright notice and this permission notice shall be included
15 ** in all copies or substantial portions of the Materials.
17 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
21 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
31 <meta charset="utf-8">
32 <title>WebGL Information</title>
33 <style type="text/css">
42 <script src="../conformance/resources/webgl-test-utils.js"> </script>
47 function createCell(txt, isTh) {
48 var str = txt.toString();
49 if (typeof txt != 'string') {
50 if (txt.length !== undefined) {
52 for (var ii = 0; ii < txt.length; ++ii) {
53 str += (ii == 0 ? "" : ", ") + txt[ii];
57 var t = document.createTextNode(str);
58 var d = document.createElement("div");
61 td = document.createElement("th");
63 td = document.createElement("td");
70 function createRow(values) {
71 var tr = document.createElement("tr");
72 for (var i = 0; i < values.length; ++i) {
73 var td = createCell(values[i], i == 0);
80 var wtu = WebGLTestUtils;
82 var canvas = document.getElementById("example");
83 var gl = wtu.create3DContext(canvas);
88 var debugRendererInfoRows = function() {
90 var debugExt = wtu.getExtensionWithKnownPrefixes(gl, 'WEBGL_debug_renderer_info');
93 'UNMASKED_VENDOR_WEBGL',
94 'UNMASKED_RENDERER_WEBGL'
96 for (var ii = 0; ii < extPnames.length; ++ii) {
97 var pname = extPnames[ii];
98 var value = gl.getParameter(debugExt[pname]);
99 rows.push([pname, value]);
105 var precisionRows = function() {
108 var addPrecisionRow = function(shaderType, precision) {
109 var typeStr = shaderType === gl.FRAGMENT_SHADER ? 'fragment' : 'vertex';
110 var precisionStr = 'highp';
111 if (precision == gl.MEDIUM_FLOAT) {
112 precisionStr = 'mediump';
113 } else if (precision == gl.LOW_FLOAT) {
114 precisionStr = 'lowp';
116 rows.push([typeStr + ' shader ' + precisionStr + ' float', gl.getShaderPrecisionFormat(shaderType, precision).precision + ' mantissa bits']);
119 var fSource = 'precision highp float; uniform float r; void main() { gl_FragColor = vec4(r, 0.0, 0.0, 1.0); }'
120 var f = wtu.loadShader(gl, fSource, gl.FRAGMENT_SHADER);
122 rows.push(['fragment shader highp float', 'not supported']);
124 addPrecisionRow(gl.FRAGMENT_SHADER, gl.HIGH_FLOAT);
126 addPrecisionRow(gl.FRAGMENT_SHADER, gl.MEDIUM_FLOAT);
127 addPrecisionRow(gl.FRAGMENT_SHADER, gl.LOW_FLOAT);
128 addPrecisionRow(gl.VERTEX_SHADER, gl.HIGH_FLOAT);
129 addPrecisionRow(gl.VERTEX_SHADER, gl.MEDIUM_FLOAT);
130 addPrecisionRow(gl.VERTEX_SHADER, gl.LOW_FLOAT);
134 var renderTargetRows = function() {
136 var oesTextureFloat = wtu.getExtensionWithKnownPrefixes(gl, 'OES_texture_float');
137 var oesTextureHalfFloat = wtu.getExtensionWithKnownPrefixes(gl, 'OES_texture_half_float');
138 var formatsToTest = [
140 description: 'RGBA UNSIGNED_BYTE',
142 type: gl.UNSIGNED_BYTE
145 description: 'RGB UNSIGNED_BYTE',
147 type: gl.UNSIGNED_BYTE
150 if (oesTextureFloat) {
152 description: 'RGBA FLOAT',
157 description: 'RGB FLOAT',
162 if (oesTextureHalfFloat) {
164 description: 'RGBA HALF_FLOAT_OES',
166 type: oesTextureHalfFloat.HALF_FLOAT_OES
169 description: 'RGB HALF_FLOAT_OES',
171 type: oesTextureHalfFloat.HALF_FLOAT_OES
174 for (var ii = 0; ii < formatsToTest.length; ++ii) {
175 var fb = gl.createFramebuffer();
176 gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
177 var format = formatsToTest[ii];
178 var tex = gl.createTexture();
179 gl.bindTexture(gl.TEXTURE_2D, tex);
180 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
181 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
182 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
183 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
184 gl.texImage2D(gl.TEXTURE_2D, 0, format.format, 256, 256, 0, format.format, format.type, null);
185 gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
186 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
187 rows.push([format.description, 'supported']);
189 rows.push([format.description, 'not supported']);
191 gl.deleteFramebuffer(fb);
192 gl.deleteTexture(tex);
205 genRows: debugRendererInfoRows
208 title: 'Textures and Viewport',
211 'MAX_CUBE_MAP_TEXTURE_SIZE',
212 'MAX_RENDERBUFFER_SIZE',
217 title: 'Shader Variables',
219 'MAX_VARYING_VECTORS',
220 'MAX_VERTEX_ATTRIBS',
221 'MAX_VERTEX_UNIFORM_VECTORS',
222 'MAX_FRAGMENT_UNIFORM_VECTORS',
223 'MAX_VERTEX_TEXTURE_IMAGE_UNITS',
224 'MAX_TEXTURE_IMAGE_UNITS',
225 'MAX_COMBINED_TEXTURE_IMAGE_UNITS'
229 title: 'Shader Precision',
230 genRows: precisionRows
233 title: 'Framebuffer Texture Attachment Support',
234 genRows: renderTargetRows
238 // TODO: max anisotropy, framebuffer depth bits, MSAA samples, max multiple render targets buffers, point size, line width
240 for (var jj = 0; jj < info.length; ++jj) {
241 var table = document.createElement("table");
242 var tb = document.createElement("tbody");
243 if (info[jj].pnames) {
244 var pnames = info[jj].pnames;
245 for (var ii = 0; ii < pnames.length; ++ii) {
246 var pname = pnames[ii];
247 var value = gl.getParameter(gl[pname]);
248 tb.appendChild(createRow([pname, value]));
251 if (info[jj].genRows) {
252 var genRows = info[jj].genRows();
253 for (var ii = 0; ii < genRows.length; ++ii) {
254 tb.appendChild(createRow(genRows[ii]));
257 table.appendChild(tb);
258 var header = document.createElement("h2");
259 header.textContent = info[jj].title;
260 document.getElementById("info").appendChild(header);
261 document.getElementById("info").appendChild(table);
263 var extensionList = document.createElement('ul');
264 var exts = gl.getSupportedExtensions();
265 var extsWithPrefixes = [];
266 while (exts.length > 0) {
267 var prefixedNames = wtu.getExtensionPrefixedNames(exts[0]);
268 var supportedPrefixedNames = [];
269 for (var ii = 0; ii < prefixedNames.length; ++ii) {
270 var index = exts.indexOf(prefixedNames[ii]);
272 supportedPrefixedNames.push(exts[index]);
273 exts.splice(index, 1);
276 extsWithPrefixes.push(supportedPrefixedNames.join(" / "));
278 extsWithPrefixes.sort();
279 for (var ii = 0; ii < extsWithPrefixes.length; ++ii) {
280 var li = document.createElement('li');
281 li.appendChild(document.createTextNode(extsWithPrefixes[ii]));
282 extensionList.appendChild(li);
284 document.getElementById('extensions').appendChild(extensionList);
290 <div id="info"></div>
291 <h2>WebGL Extensions</h2>
292 <div id="extensions"></div>
293 <canvas id="example" width="256" height="16" style="width: 256px; height: 48px;"></canvas>