LayoutTests/webgl/2.0.0/resources/webgl_test_files/conformance/limits/gl-max-texture-dimensions.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 the max advertized texture size is supported.</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="4" height="4" style="width: 40px; height: 30px;"></canvas>
 <div id="description"></div>
 <div id="console"></div>
 <script id="vshader" type="x-shader/x-vertex">
 attribute vec4 vPosition;
 attribute vec2 texCoord0;
 varying vec2 texCoord;
 void main()
 {
     gl_Position = vPosition;
     texCoord = texCoord0;
 }
 </script>

 <script id="fshader" type="x-shader/x-fragment">
 precision mediump float;
 uniform samplerCube tex;
 varying vec2 texCoord;
 void main()
 {
     gl_FragColor = textureCube(tex, normalize(vec3(texCoord, 1)));
 }
 </script>
 <script>
 "use strict";
 description(document.title);
 var wtu = WebGLTestUtils;
 var gl = wtu.create3DContext("example");
 var program = wtu.setupTexturedQuad(gl);

 function shouldBePowerOfTwo(n, name) {
     var power = Math.round(Math.log(n) / Math.log(2));
     if (Math.pow(2, power) == n) {
         testPassed(name + ' is a power of two.');
     } else {
         testFailed(name + ' should be a power of two, but was ' + n);
     }
 }

 // Note: It seems like a reasonable assuption that a 1xN texture size should
 // work. Even 1 by 128k is only 512k
 var maxSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);
 debug("advertised max size: " + maxSize);
 debug("verifying max size is power-of-two (implied by GLES 2.0 section 3.7.1)");
 shouldBePowerOfTwo(maxSize, 'Max size');
 var testSize = Math.min(maxSize, 128 * 1024);
 var pixels = new Uint8Array(testSize * 4);
 for (var ii = 0; ii < testSize; ++ii) {
   var off = ii * 4;
   pixels[off + 0] = 0;
   pixels[off + 1] = 255;
   pixels[off + 2] = 128;
   pixels[off + 3] = 255;
 }
 var tex = gl.createTexture();
 gl.bindTexture(gl.TEXTURE_2D, tex);

 debug("test " + testSize + "x1");
 gl.texImage2D(
     gl.TEXTURE_2D, 0, gl.RGBA, testSize, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE,
     pixels);
 gl.generateMipmap(gl.TEXTURE_2D);

 wtu.clearAndDrawUnitQuad(gl);
 wtu.checkCanvas(gl, [0, 255, 128, 255],
                 "Should be 0, 255, 128, 255");
 debug("test 1x" + testSize);
 gl.texImage2D(
     gl.TEXTURE_2D, 0, gl.RGBA, 1, testSize, 0, gl.RGBA, gl.UNSIGNED_BYTE,
     pixels);
 gl.generateMipmap(gl.TEXTURE_2D);

 wtu.clearAndDrawUnitQuad(gl);
 wtu.checkCanvas(gl, [0, 255, 128, 255],
                 "Should be 0, 255, 128, 255");

 var program = wtu.setupProgram(
     gl, ['vshader', 'fshader'], ['vPosition', 'texCoord0'], [0, 1]);

 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors.");

 // NOTE: We can't easily test cube maps because they require width == height
 // and we might not have enough memory for maxSize by maxSize texture.

 var successfullyParsed = true;

 </script>
 <script src="../../js/js-test-post.js"></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 the max advertized texture size is supported.</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="4" height="4" style="width: 40px; height: 30px;"></canvas>
	<div id="description"></div>
	<div id="console"></div>
	<script id="vshader" type="x-shader/x-vertex">
	attribute vec4 vPosition;
	attribute vec2 texCoord0;
	varying vec2 texCoord;
	void main()
	{
	gl_Position = vPosition;
	texCoord = texCoord0;
	}
	</script>

	<script id="fshader" type="x-shader/x-fragment">
	precision mediump float;
	uniform samplerCube tex;
	varying vec2 texCoord;
	void main()
	{
	gl_FragColor = textureCube(tex, normalize(vec3(texCoord, 1)));
	}
	</script>
	<script>
	"use strict";
	description(document.title);
	var wtu = WebGLTestUtils;
	var gl = wtu.create3DContext("example");
	var program = wtu.setupTexturedQuad(gl);

	function shouldBePowerOfTwo(n, name) {
	var power = Math.round(Math.log(n) / Math.log(2));
	if (Math.pow(2, power) == n) {
	testPassed(name + ' is a power of two.');
	} else {
	testFailed(name + ' should be a power of two, but was ' + n);
	}
	}

	// Note: It seems like a reasonable assuption that a 1xN texture size should
	// work. Even 1 by 128k is only 512k
	var maxSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);
	debug("advertised max size: " + maxSize);
	debug("verifying max size is power-of-two (implied by GLES 2.0 section 3.7.1)");
	shouldBePowerOfTwo(maxSize, 'Max size');
	var testSize = Math.min(maxSize, 128 * 1024);
	var pixels = new Uint8Array(testSize * 4);
	for (var ii = 0; ii < testSize; ++ii) {
	var off = ii * 4;
	pixels[off + 0] = 0;
	pixels[off + 1] = 255;
	pixels[off + 2] = 128;
	pixels[off + 3] = 255;
	}
	var tex = gl.createTexture();
	gl.bindTexture(gl.TEXTURE_2D, tex);

	debug("test " + testSize + "x1");
	gl.texImage2D(
	gl.TEXTURE_2D, 0, gl.RGBA, testSize, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE,
	pixels);
	gl.generateMipmap(gl.TEXTURE_2D);

	wtu.clearAndDrawUnitQuad(gl);
	wtu.checkCanvas(gl, [0, 255, 128, 255],
	"Should be 0, 255, 128, 255");
	debug("test 1x" + testSize);
	gl.texImage2D(
	gl.TEXTURE_2D, 0, gl.RGBA, 1, testSize, 0, gl.RGBA, gl.UNSIGNED_BYTE,
	pixels);
	gl.generateMipmap(gl.TEXTURE_2D);

	wtu.clearAndDrawUnitQuad(gl);
	wtu.checkCanvas(gl, [0, 255, 128, 255],
	"Should be 0, 255, 128, 255");

	var program = wtu.setupProgram(
	gl, ['vshader', 'fshader'], ['vPosition', 'texCoord0'], [0, 1]);

	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors.");

	// NOTE: We can't easily test cube maps because they require width == height
	// and we might not have enough memory for maxSize by maxSize texture.

	var successfullyParsed = true;

	</script>
	<script src="../../js/js-test-post.js"></script>

	</body>
	</html>