dom/canvas/test/webgl-conf/checkout/conformance2/rendering/framebuffer-completeness-draw-framebuffer.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>Test draw framebuffer completeness when an incomplete framebuffer is bound to read framebuffer</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 <script>
  20 // This exposes a bug in Chrome 67: If the read framebuffer is incomplete, then draw can fail even if the draw framebuffer is complete.
  21 // http://anglebug.com/2737
  22
  23 "use strict";
  24 description();
  25
  26 var wtu = WebGLTestUtils;
  27 var gl = wtu.create3DContext(undefined, undefined, 2);
  28 if (!gl) {
  29   testFailed("context does not exist");
  30 } else {
  31   testPassed("context exists");
  32
  33   var incompleteFb = gl.createFramebuffer();
  34   gl.bindFramebuffer(gl.FRAMEBUFFER, incompleteFb);
  35   var incompleteTex = gl.createTexture();
  36   gl.bindTexture(gl.TEXTURE_2D, incompleteTex);
  37   gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, incompleteTex, 0);
  38   shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT');
  39
  40   wtu.setupUnitQuad(gl, 0, 1);
  41
  42   var testProgram = wtu.setupSimpleColorProgram(gl, 0);
  43
  44   // If this is changed to gl.FRAMEBUFFER, the rendering succeeds on Chrome 67.
  45   var drawFbTarget = gl.DRAW_FRAMEBUFFER;
  46
  47   var completeFb = gl.createFramebuffer();
  48   gl.bindFramebuffer(drawFbTarget, completeFb);
  49   var completeTex = gl.createTexture();
  50   gl.bindTexture(gl.TEXTURE_2D, completeTex);
  51   gl.texStorage2D(gl.TEXTURE_2D, 1, gl.RGBA8, 128, 128);
  52   gl.framebufferTexture2D(drawFbTarget, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, completeTex, 0);
  53   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error after setup");
  54
  55   shouldBe('gl.checkFramebufferStatus(gl.READ_FRAMEBUFFER)', 'gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT');
  56   shouldBe('gl.checkFramebufferStatus(gl.DRAW_FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
  57
  58   gl.viewport(0, 0, 128, 128);
  59   gl.uniform4f(gl.getUniformLocation(testProgram, 'u_color'), 0, 1, 0, 1);
  60   wtu.drawUnitQuad(gl);
  61
  62   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error after draw");
  63   gl.bindFramebuffer(gl.READ_FRAMEBUFFER, completeFb);
  64   wtu.checkCanvasRect(gl, 0, 0, 128, 128, [0, 255, 0, 255], 'should be green', 2);
  65 }
  66
  67 debug("");
  68 var successfullyParsed = true;
  69
  70 </script>
  71 <script src="../../js/js-test-post.js"></script>
  72
  73 </body>
  74 </html>