dom/canvas/test/webgl-conf/checkout/conformance2/rendering/framebuffer-texture-level1.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 framebuffer using texture level 1</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="2" height="2"> </canvas>
  20 <script>
  21 "use strict";
  22 var wtu = WebGLTestUtils;
  23 var gl;
  24
  25 function testFramebufferTextureWithNonZeroBaseLevel(level) {
  26   if (level < 1) {
  27     throw "This test is incorrect if level < 1";
  28   }
  29   var width = 32;
  30   var height = 16;
  31   var texture = gl.createTexture();
  32   gl.bindTexture(gl.TEXTURE_2D, texture);
  33   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
  34   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
  35   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
  36   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
  37   gl.texImage2D(gl.TEXTURE_2D, level, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
  38   var fbo = gl.createFramebuffer();
  39   gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
  40   gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, level);
  41   shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT");
  42   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_BASE_LEVEL, level);
  43   shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
  44   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Setup framebuffer with texture should succeed.");
  45
  46   gl.deleteTexture(texture);
  47   gl.deleteFramebuffer(fbo);
  48 }
  49
  50 description("Test fbo completeness when using non level 0 texture images");
  51
  52 var canvas = document.getElementById("canvas");
  53 shouldBeNonNull("gl = wtu.create3DContext(canvas, undefined, 2)");
  54
  55 testFramebufferTextureWithNonZeroBaseLevel(1);
  56
  57 debug("");
  58 var successfullyParsed = true;
  59
  60 </script>
  61 <script src="../../js/js-test-post.js"></script>
  62
  63 </body>
  64 </html>