dom/canvas/test/webgl-conf/checkout/conformance2/samplers/multi-context-sampler-test.html

   1 <!--
   2 Copyright (c) 2019 The Khronos Group Inc.
   3 Use of this source code is governed by an MIT-style license that can be
   4 found in the LICENSE.txt file.
   5 -->
   6
   7 <!DOCTYPE html>
   8 <html>
   9 <head>
  10 <meta charset="utf-8">
  11 <title>WebGL Multi-Context Sampler Test</title>
  12 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  13 <script src="../../js/js-test-pre.js"></script>
  14 <script src="../../js/webgl-test-utils.js"></script>
  15 </head>
  16 <body>
  17 <canvas id="canvas_drawing" width="12" height="12"></canvas>
  18 <div id="description"></div>
  19 <div id="console"></div>
  20 <script>
  21 "use strict";
  22 description("Tests that samplers' state doesn't leak across contexts");
  23 debug("");
  24 debug('Regression test for <a href="http://crbug.com/713127">http://crbug.com/713127</a>');
  25
  26 function runTest() {
  27     var wtu = WebGLTestUtils;
  28     var gl = wtu.create3DContext("canvas_drawing", undefined, 2);
  29     var texture = null;
  30     var color = [0, 255, 0, 255];
  31
  32     if (!gl) {
  33         testFailed("WebGL context does not exist");
  34         return;
  35     }
  36
  37     testPassed("WebGL context exists");
  38
  39     wtu.setupTexturedQuad(gl);
  40     texture = gl.createTexture();
  41     // Create a texture bigger than 1x1 so that it would need mipmaps in
  42     // order to be complete.
  43     wtu.fillTexture(gl, texture, 2, 2, color, 0,
  44                     gl.RGBA, gl.UNSIGNED_BYTE, gl.RGBA8);
  45     // Set texture parameters so that this texture is complete.
  46     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
  47     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
  48
  49     // Set up a secondary context with a sampler bound to texture unit
  50     // 0. This should not interfere with the primary context.
  51     var altGL = wtu.create3DContext(undefined, undefined, 2);
  52     if (!altGL) {
  53         testFailed("Error creating secondary WebGL context");
  54         return;
  55     }
  56
  57     var sampler = altGL.createSampler();
  58     // Note that the sampler's default TEXTURE_MIN_FILTER is
  59     // NEAREST_MIPMAP_LINEAR.
  60     altGL.bindSampler(0, sampler);
  61     altGL.clearColor(1, 0, 0, 1);
  62     altGL.clear(altGL.COLOR_BUFFER_BIT);
  63     wtu.checkCanvasRect(altGL, 0, 0, 1, 1, [ 255, 0, 0, 255 ],
  64                         "should be red");
  65
  66     // Now switch back to the main context and draw the texture.
  67     gl.clearColor(1, 1, 1, 1);
  68     gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
  69     wtu.drawUnitQuad(gl);
  70     // The presence of the sampler on the other context should not
  71     // have interfered with the completeness of the texture.
  72     wtu.checkCanvasRect(gl, 0, 0, 1, 1, color,
  73                         "should be green");
  74
  75     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors");
  76 }
  77
  78 runTest();
  79 var successfullyParsed = true;
  80 </script>
  81 <script src="../../js/js-test-post.js"></script>
  82
  83 </body>
  84 </html>