The Tor Browser: content/canvas/test/webgl-conformance/conformance/limits/gl-max-texture-dimensions.html@8bccb770b82d

     1 <!--

     2 Copyright (c) 2011 The Chromium Authors. All rights reserved.

     3 Use of this source code is governed by a BSD-style license that can be

     4 found in the LICENSE file.

     5  -->

     6 <!DOCTYPE html>

     7 <html>

     8 <head>

     9 <meta charset="utf-8">

    10 <title>WebGL the max advertized texture size is supported.</title>

    11 <link rel="stylesheet" href="../../resources/js-test-style.css"/>

    12 <script src="../../resources/js-test-pre.js"></script>

    13 <script src="../resources/webgl-test.js"> </script>

    14 <script src="../resources/webgl-test-utils.js"> </script>

    15 </head>

    16 <body>

    17 <canvas id="example" width="4" height="4" style="width: 40px; height: 30px;"></canvas>

    18 <div id="description"></div>

    19 <div id="console"></div>

    20 <script id="vshader" type="x-shader/x-vertex">

    21 attribute vec4 vPosition;

    22 attribute vec2 texCoord0;

    23 varying vec2 texCoord;

    24 void main()

    25 {

    26     gl_Position = vPosition;

    27     texCoord = texCoord0;

    28 }

    29 </script>

    31 <script id="fshader" type="x-shader/x-fragment">

    32 precision mediump float;

    33 uniform samplerCube tex;

    34 varying vec2 texCoord;

    35 void main()

    36 {

    37     gl_FragColor = textureCube(tex, normalize(vec3(texCoord, 1)));

    38 }

    39 </script>

    40 <script>

    41 description(document.title);

    42 var wtu = WebGLTestUtils;

    43 var gl = wtu.create3DContext("example");

    44 var program = wtu.setupTexturedQuad(gl);

    46 // Note: It seems like a reasonable assuption that a 1xN texture size should

    47 // work. Even 1 by 128k is only 512k

    48 var maxSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);

    49 debug("advertised max size: " + maxSize);

    50 var testSize = Math.min(maxSize, 128 * 1024);

    51 var pixels = new Uint8Array(testSize * 4);

    52 for (var ii = 0; ii < testSize; ++ii) {

    53   var off = ii * 4;

    54   pixels[off + 0] = 0;

    55   pixels[off + 1] = 255;

    56   pixels[off + 2] = 128;

    57   pixels[off + 3] = 255;

    58 }

    59 var tex = gl.createTexture();

    60 gl.bindTexture(gl.TEXTURE_2D, tex);

    62 debug("test " + testSize + "x1");

    63 gl.texImage2D(

    64     gl.TEXTURE_2D, 0, gl.RGBA, testSize, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE,

    65     pixels);

    66 gl.generateMipmap(gl.TEXTURE_2D);

    68 wtu.drawQuad(gl);

    69 wtu.checkCanvas(gl, [0, 255, 128, 255],

    70                 "Should be 0, 255, 128, 255");

    71 debug("test 1x" + testSize);

    72 gl.texImage2D(

    73     gl.TEXTURE_2D, 0, gl.RGBA, 1, testSize, 0, gl.RGBA, gl.UNSIGNED_BYTE,

    74     pixels);

    75 gl.generateMipmap(gl.TEXTURE_2D);

    77 wtu.drawQuad(gl);

    78 wtu.checkCanvas(gl, [0, 255, 128, 255],

    79                 "Should be 0, 255, 128, 255");

    81 var program = wtu.setupProgram(

    82     gl, ['vshader', 'fshader'], ['vPosition', 'texCoord0'], [0, 1]);

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

    86 // NOTE: We can't easily test cube maps because they require width == height

    87 // and we might not have enough memory for maxSize by maxSize texture.

    89 successfullyParsed = true;

    91 </script>

    92 <script>finishTest();</script>

    94 </body>

    95 </html>

The Tor Browser / file revision