dom/canvas/test/webgl-conf/checkout/conformance2/rendering/blitframebuffer-size-overflow.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 BlitFramebuffer Tests</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="example" width="8" height="8"></canvas>
  18 <div id="description"></div>
  19 <div id="console"></div>
  20 <script>
  21 "use strict";
  22
  23 var wtu = WebGLTestUtils;
  24 description("This test verifies blitFramebuffer won't cause a crash when the computed sizes might overflow.");
  25
  26 var width = 8;
  27 var height = 8;
  28
  29 var gl = wtu.create3DContext("example", undefined, 2);
  30 if (!gl) {
  31     testFailed("WebGL context does not exist");
  32 } else {
  33     testPassed("WebGL context exists");
  34     blit_region_test();
  35 }
  36
  37 function blit_region_test() {
  38
  39     debug("");
  40     debug("Begin to run blitFramebuffer. The computed width/height of src and/or dst region might overflow during blitting.");
  41     var tex0 = gl.createTexture();
  42     gl.bindTexture(gl.TEXTURE_2D, tex0);
  43     gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA8, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
  44     var fb0 = gl.createFramebuffer();
  45     gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fb0);
  46     gl.framebufferTexture2D(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex0, 0);
  47
  48     var tex1 = gl.createTexture();
  49     gl.bindTexture(gl.TEXTURE_2D, tex1);
  50     gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA8, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
  51     var fb1 = gl.createFramebuffer();
  52     gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, fb1);
  53     gl.framebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex1, 0);
  54     if ((gl.checkFramebufferStatus(gl.READ_FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) ||
  55         (gl.checkFramebufferStatus(gl.DRAW_FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE)) {
  56         testFailed("Framebuffer incomplete.");
  57         return;
  58     }
  59
  60     var max = 0x7fffffff;
  61     gl.blitFramebuffer(0, 0, max, max, 0, 0, width, height, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  62     gl.blitFramebuffer(0, 0, width, height, 0, 0, max, max, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  63     gl.blitFramebuffer(0, 0, max, max, 0, 0, max, max, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  64     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Using max 32-bit integer as blitFramebuffer parameter should succeed.");
  65
  66     gl.blitFramebuffer(-1, -1, max - 1, max - 1, 0, 0, width, height, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  67     gl.blitFramebuffer(0, 0, width, height, -1, -1, max - 1, max - 1, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  68     gl.blitFramebuffer(-1, -1, max - 1, max - 1, -1, -1, max - 1, max - 1, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  69     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Using blitFramebuffer parameters where calculated width/height matches max 32-bit integer should succeed.");
  70
  71     gl.blitFramebuffer(-1, -1, max, max, 0, 0, width, height, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  72     wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "Using source width/height greater than max 32-bit integer should fail.");
  73     gl.blitFramebuffer(max, max, -1, -1, 0, 0, width, height, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  74     wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "Using source width/height greater than max 32-bit integer should fail.");
  75     gl.blitFramebuffer(0, 0, width, height, -1, -1, max, max, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  76     wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "Using destination width/height greater than max 32-bit integer should fail.");
  77     gl.blitFramebuffer(0, 0, width, height, max, max, -1, -1, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  78     wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "Using destination width/height greater than max 32-bit integer should fail.");
  79     gl.blitFramebuffer(-1, -1, max, max, -1, -1, max, max, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  80     wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "Using both source and destination width/height greater than max 32-bit integer should fail.");
  81     gl.blitFramebuffer(-max - 1, -max - 1, max, max, -max - 1, -max - 1, max, max, gl.COLOR_BUFFER_BIT, gl.NEAREST);
  82     wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "Using minimum and maximum integers for all boundaries should fail.");
  83
  84     gl.bindTexture(gl.TEXTURE_2D, null)
  85     gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
  86     gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, null);
  87     gl.deleteTexture(tex0);
  88     gl.deleteTexture(tex1);
  89     gl.deleteFramebuffer(fb0);
  90     gl.deleteFramebuffer(fb1);
  91 }
  92
  93 var successfullyParsed = true;
  94 </script>
  95 <script src="../../js/js-test-post.js"></script>
  96
  97 </body>
  98 </html>