LayoutTests/webgl/2.0.0/resources/webgl_test_files/extra/lots-of-polys-example.html - WebKit - Git at Google

 <!--

 /*
 ** Copyright (c) 2012 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
 ** "Materials"), to deal in the Materials without restriction, including
 ** without limitation the rights to use, copy, modify, merge, publish,
 ** distribute, sublicense, and/or sell copies of the Materials, and to
 ** permit persons to whom the Materials are furnished to do so, subject to
 ** the following conditions:
 **
 ** The above copyright notice and this permission notice shall be included
 ** in all copies or substantial portions of the Materials.
 **
 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
 */

 -->

 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="utf-8">
 <title>WebGL Lots of polygons example.</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>
 <canvas id="example" width="1024" height="1024" style="width: 40px; height: 40px;">
 </canvas>
 <div id="description"></div>
 <div id="console"></div>
 <script>
 "use strict";
 window.onload = init;
 debug("Tests a WebGL program that draws a bunch of large polygons");

 function init() {
   if (confirm(
       "After clicking OK your machine may become unresponsive or crash.")) {
     main();
   } else {
     debug("cancelled");
   }
 }

 function main() {
   var wtu = WebGLTestUtils;
   var canvas = document.getElementById("example");
   canvas.addEventListener("webglcontextlost", function(e) { e.preventDefault(); }, false);
   canvas.addEventListener("webglcontextrestored", function(e) { }, false);

   var gl = wtu.create3DContext(canvas);
   var program = wtu.setupTexturedQuad(gl);

   assertMsg(gl.getError() == gl.NO_ERROR, "Should be no errors from setup.");

   var tex = gl.createTexture();
   gl.enable(gl.BLEND);
   gl.disable(gl.DEPTH_TEST);

   wtu.fillTexture(gl, tex, 4096, 4096, [0, 192, 128, 255], 0);
   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after creating texture");

   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after setting texture params");

   var loc = gl.getUniformLocation(program, "tex");
   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after getting tex locations");
   gl.uniform1i(loc, 0);
   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after setting tex uniform");

   var numQuads = 100000;
   var indexBuf = new ArrayBuffer(numQuads * 6);
   var indices = new Uint8Array(indexBuf);
   for (var ii = 0; ii < numQuads; ++ii) {
     var offset = ii * 6;
     indices[offset + 0] = 0;
     indices[offset + 1] = 1;
     indices[offset + 2] = 2;
     indices[offset + 3] = 3;
     indices[offset + 4] = 4;
     indices[offset + 5] = 5;
   }
   var indexBuffer = gl.createBuffer();
   gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer);
   gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW);
   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after creating index buffer");
   gl.drawElements(gl.TRIANGLES, numQuads * 6, gl.UNSIGNED_BYTE, 0);
   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after drawing");

   var successfullyParsed = true;
 }
 </script>
 </body>
 </html>
	<!--

	/*
	** Copyright (c) 2012 The Khronos Group Inc.
	**
	** Permission is hereby granted, free of charge, to any person obtaining a
	** copy of this software and/or associated documentation files (the
	** "Materials"), to deal in the Materials without restriction, including
	** without limitation the rights to use, copy, modify, merge, publish,
	** distribute, sublicense, and/or sell copies of the Materials, and to
	** permit persons to whom the Materials are furnished to do so, subject to
	** the following conditions:
	**
	** The above copyright notice and this permission notice shall be included
	** in all copies or substantial portions of the Materials.
	**
	** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
	** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
	** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
	** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
	*/

	-->

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>WebGL Lots of polygons example.</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>
	<canvas id="example" width="1024" height="1024" style="width: 40px; height: 40px;">
	</canvas>
	<div id="description"></div>
	<div id="console"></div>
	<script>
	"use strict";
	window.onload = init;
	debug("Tests a WebGL program that draws a bunch of large polygons");

	function init() {
	if (confirm(
	"After clicking OK your machine may become unresponsive or crash.")) {
	main();
	} else {
	debug("cancelled");
	}
	}

	function main() {
	var wtu = WebGLTestUtils;
	var canvas = document.getElementById("example");
	canvas.addEventListener("webglcontextlost", function(e) { e.preventDefault(); }, false);
	canvas.addEventListener("webglcontextrestored", function(e) { }, false);

	var gl = wtu.create3DContext(canvas);
	var program = wtu.setupTexturedQuad(gl);

	assertMsg(gl.getError() == gl.NO_ERROR, "Should be no errors from setup.");

	var tex = gl.createTexture();
	gl.enable(gl.BLEND);
	gl.disable(gl.DEPTH_TEST);

	wtu.fillTexture(gl, tex, 4096, 4096, [0, 192, 128, 255], 0);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after creating texture");

	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after setting texture params");

	var loc = gl.getUniformLocation(program, "tex");
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after getting tex locations");
	gl.uniform1i(loc, 0);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after setting tex uniform");

	var numQuads = 100000;
	var indexBuf = new ArrayBuffer(numQuads * 6);
	var indices = new Uint8Array(indexBuf);
	for (var ii = 0; ii < numQuads; ++ii) {
	var offset = ii * 6;
	indices[offset + 0] = 0;
	indices[offset + 1] = 1;
	indices[offset + 2] = 2;
	indices[offset + 3] = 3;
	indices[offset + 4] = 4;
	indices[offset + 5] = 5;
	}
	var indexBuffer = gl.createBuffer();
	gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer);
	gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after creating index buffer");
	gl.drawElements(gl.TRIANGLES, numQuads * 6, gl.UNSIGNED_BYTE, 0);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "after drawing");

	var successfullyParsed = true;
	}
	</script>
	</body>
	</html>