dom/canvas/test/webgl-conf/checkout/conformance/rendering/clear-after-copyTexImage2D.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 clear after copyTexImage2D with a non-pure color</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 <div id="description"></div>
  18 <div id="console"></div>
  19 <canvas id="canvas" width="128" height="128"> </canvas>
  20 <script>
  21 "use strict";
  22 // This test verifies a Intel D3D driver bug.
  23 var wtu = WebGLTestUtils;
  24 var gl = wtu.create3DContext("canvas", {"antialias" : "true"});
  25
  26 function testClearAfterCopyTexImage2DWithoutPureOneOrZero(clearColor, expectedColor)
  27 {
  28   gl.bindFramebuffer(gl.FRAMEBUFFER, null);
  29   gl.clearColor(0, 0, 0, 1);
  30   gl.clear(gl.COLOR_BUFFER_BIT);
  31
  32   var width = 16;
  33   var height = 16;
  34   var texture = gl.createTexture();
  35   gl.bindTexture(gl.TEXTURE_2D, texture);
  36   gl.copyTexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 0, 0, width, height, 0);
  37   gl.clearColor(clearColor[0], clearColor[1], clearColor[2], clearColor[3]);
  38   gl.clear(gl.COLOR_BUFFER_BIT);
  39
  40   wtu.checkCanvasRect(gl, 0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight, expectedColor);
  41
  42   gl.bindTexture(gl.TEXTURE_2D, null);
  43   gl.deleteTexture(texture);
  44 }
  45
  46 description("Test that if clear with a color that has non-0/1 RGB components after copyTexImage2D, the final render color should be consistent with the clear color.");
  47
  48 for(var index = 0; index < 3; index++)
  49 {
  50   var clearColor = [0, 0, 0, 1];
  51   var expectedColor = [0, 0, 0, 255];
  52   clearColor[index] = 0.8;
  53   expectedColor[index] = 255 * clearColor[index];
  54   testClearAfterCopyTexImage2DWithoutPureOneOrZero(clearColor, expectedColor);
  55 }
  56
  57 debug("");
  58 var successfullyParsed = true;
  59
  60 </script>
  61 <script src="../../js/js-test-post.js"></script>
  62
  63 </body>
  64 </html>