dom/canvas/test/webgl-conf/checkout/conformance2/rendering/framebuffer-completeness-unaffected.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 drawBuffers, readBuffer, and fbo completeness</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="20" height="20"> </canvas>
  20 <script>
  21 // In MacOSX, if drawBuffers() and readBuffer() both select an attachment with no image attached,
  22 // fbo becomes incomplete. However, drawBuffers() and readBuffer() should not affect fbo completeness.
  23
  24 "use strict";
  25 description("This tests drawBuffers, readBuffer, and fbo completeness");
  26
  27 var setupRenderbuffer = function(attachment) {
  28   var renderbuffer = gl.createRenderbuffer();
  29   gl.bindRenderbuffer(gl.RENDERBUFFER, renderbuffer);
  30   gl.framebufferRenderbuffer(gl.FRAMEBUFFER, attachment, gl.RENDERBUFFER, renderbuffer);
  31   gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA8, canvas.width, canvas.height);
  32   return renderbuffer;
  33 }
  34
  35 var wtu = WebGLTestUtils;
  36 var canvas = document.getElementById("canvas");
  37 var gl = wtu.create3DContext(canvas, undefined, 2);
  38 if (!gl) {
  39   testFailed("context does not exist");
  40 } else {
  41   testPassed("context exists");
  42
  43   var fb = gl.createFramebuffer();
  44   gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
  45
  46   debug("fbo with two color images attached should be complete");
  47   var colorbuffer = setupRenderbuffer(gl.COLOR_ATTACHMENT0);
  48   var colorbuffer1 = setupRenderbuffer(gl.COLOR_ATTACHMENT1);
  49   shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
  50
  51   debug("drawBuffers selects ATTACHMENT1, fbo should be complete");
  52   gl.drawBuffers([gl.NONE, gl.COLOR_ATTACHMENT1]);
  53   shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
  54
  55   debug("remove image attached to ATTACHMENT1, fbo should be complete");
  56   gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT1, gl.RENDERBUFFER, null);
  57   shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
  58
  59   debug("set read buffer to ATTACHMENT1, fbo should be complete");
  60   gl.readBuffer(gl.COLOR_ATTACHMENT1);
  61   shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
  62
  63   debug("drawBuffers selects ATTACHMENT0, fbo should be complete");
  64   gl.drawBuffers([gl.COLOR_ATTACHMENT0]);
  65   shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
  66
  67   debug("drawBuffers selects ATTACHMENT1, fbo should be complete");
  68   gl.drawBuffers([gl.NONE, gl.COLOR_ATTACHMENT1]);
  69   shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
  70
  71   debug("set read buffer to ATTACHMENT0, fbo should be complete");
  72   gl.readBuffer(gl.COLOR_ATTACHMENT0);
  73   shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
  74
  75   gl.deleteFramebuffer(fb);
  76   gl.deleteRenderbuffer(colorbuffer);
  77   gl.deleteRenderbuffer(colorbuffer1);
  78
  79   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no error after setup and clear render buffer");
  80 }
  81
  82 debug("");
  83 var successfullyParsed = true;
  84
  85 </script>
  86 <script src="../../js/js-test-post.js"></script>
  87
  88 </body>
  89 </html>