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| ** Copyright (c) 2012 The Khronos Group Inc. |
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| ** "Materials"), to deal in the Materials without restriction, including |
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| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WebGL Out Of VRAM Test</title> |
| <link rel="stylesheet" href="../resources/js-test-style.css"/> |
| <script src="../js/js-test-pre.js"></script> |
| <script src="../js/webgl-test-utils.js"></script> |
| </head> |
| <body> |
| <div id="description"></div> |
| <div id="console"></div> |
| <canvas id="canvas" width="2" height="2"> </canvas> |
| <script> |
| "use strict"; |
| debug("This tests WebGL running out of vram."); |
| |
| debug(""); |
| debug("Canvas.getContext"); |
| |
| var wtu = WebGLTestUtils; |
| var canvas = document.getElementById("canvas"); |
| try { |
| var gl = wtu.create3DContext(canvas); |
| } catch(e) { |
| } |
| if (!gl) { |
| testFailed("could not create context"); |
| } else { |
| testPassed("context exists"); |
| |
| var args = wtu.getUrlArguments(); |
| |
| canvas.addEventListener('webglcontextlost', contextLost, false); |
| |
| function contextLost(e) { |
| e.preventDefault(); |
| debug("***context lost***"); |
| } |
| |
| function contextRestored(e) { |
| debug("***context restored***"); |
| } |
| |
| var program = wtu.setupTexturedQuad(gl); |
| gl.useProgram(program); |
| |
| debug(""); |
| debug("Allocating textures."); |
| |
| var intervalId; |
| var count = 0; |
| var textureMem = 0; |
| var textures = []; |
| var size = 2048; |
| var limit = (args.limit ? args.limit : 8192) * 1024 * 1024; |
| |
| debug("limit: " + InMB(limit)) |
| |
| function InMB(v) { |
| return "" + Math.floor(v / 1024 / 1024) + "MB"; |
| } |
| |
| function makeTexture() { |
| if (gl.isContextLost()) { |
| stop("out of memory"); |
| return; |
| } |
| ++count; |
| textureMem += size * size * 4; |
| if (textureMem > limit) { |
| stop("reached limit"); |
| return; |
| } |
| debug ("creating texture #" + count + " mem = " + InMB(textureMem)); |
| var texture = gl.createTexture(); |
| textures.push(texture); |
| gl.bindTexture(gl.TEXTURE_2D, texture); |
| gl.texImage2D(gl.TEXTURE_2D, |
| 0, // level |
| gl.RGBA, // internalFormat |
| size, // width |
| size, // height |
| 0, // border |
| gl.RGBA, // format |
| gl.UNSIGNED_BYTE, // type |
| null); // data |
| var err = gl.getError(); |
| if (err != gl.NO_ERROR) { |
| stop("got error: " + wtu.glEnumToString(gl, err)); |
| return; |
| } |
| // use the texture |
| wtu.clearAndDrawUnitQuad(gl); |
| } |
| |
| intervalId = window.setInterval(makeTexture, 1000 / 15); |
| |
| } |
| |
| function stop(msg) { |
| window.clearInterval(intervalId); |
| testPassed(msg); |
| finishTest(); |
| } |
| </script> |
| </body> |
| </html> |
