The Tor Browser: content/canvas/test/webgl-conformance/extra/canvas-compositing-test.html@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

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    26 <!DOCTYPE html>

    27 <html>

    28   <head>

    29 <meta charset="utf-8">

    30     <title>Canvas Compositing Test</title>

    31     <link rel="stylesheet" href="../resources/js-test-style.css"/>

    32     <script src="../resources/js-test-pre.js"></script>

    33     <script src="../conformance/resources/webgl-test.js"> </script>

    34 </head>

    35 <body>

    36 Below are 2 50x50 pixel canvas but using CSS to display them at 100x100 pixels. <br/>

    37 They are solid black with a red triangle<br/>

    38 They each have a 10px CSS solid black border around them.<br/>

    39 Depending on how the browser composites the canvas with the page  they will get

    40 a white outline<hr/>

    41 <div>

    42 2d canvas<br/>

    43 <canvas id="example2" width="50" height="50" style="width: 100px; height: 100px; border: 10px solid black;"></canvas>

    44 </div>

    45 <hr/>

    46 3d canvas<br/>

    47 <div>

    48 <canvas id="example" width="50" height="50" style="width: 100px; height: 100px; border: 10px solid black;"></canvas>

    49 </div>

    50 <hr/>

    51 img tag<br/>

    52 <img src="50x50pixel-black-with-red-triangle.png" style="width: 100px; height: 100px; border: 10px solid black;"/>

    53 <div id="description"></div>

    54 <div id="console"></div>

    55     <script id="vshader" type="x-shader/x-vertex">

    56         attribute vec4 vPosition;

    57         void main()

    58         {

    59             gl_Position = vPosition;

    60         }

    61     </script>

    63     <script id="fshader" type="x-shader/x-fragment">

    64         void main()

    65         {

    66             gl_FragColor = vec4(1.0,0.0,0.0,1.0);

    67         }

    68     </script>

    70     <script>

    71         function fail(x,y, buf, shouldBe)

    72         {

    73             var i = (y*50+x) * 4;

    74             var reason = "pixel at ("+x+","+y+") is ("+buf[i]+","+buf[i+1]+","+buf[i+2]+","+buf[i+3]+"), should be "+shouldBe;

    75             testFailed(reason);

    76         }

    78         function pass()

    79         {

    80             testPassed("drawing is correct");

    81         }

    83         function init()

    84         {

    85   var canvas2d = document.getElementById("example2");

    86   var ctx2d = canvas2d.getContext("2d");

    87   ctx2d.fillStyle = "rgba(0, 0, 0, 255)"

    88   ctx2d.fillRect(0, 0, 50, 50);

    89   ctx2d.fillStyle = "rgba(255, 0, 0, 255)"

    90   ctx2d.beginPath();

    91   ctx2d.moveTo(25, 12.5);

    92   ctx2d.lineTo(12.5, 37.5);

    93   ctx2d.lineTo(37.5, 37.5);

    94   ctx2d.lineTo(25, 12.5);

    95   ctx2d.fill();

    98             if (window.initNonKhronosFramework) {

    99                 window.initNonKhronosFramework(false);

   100             }

   102             gl = initWebGL("example", "vshader", "fshader", [ "vPosition"], [ 0, 0, 0, 1 ], 1);

   103             gl.viewport(0, 0, 50, 50);

   105             var vertexObject = gl.createBuffer();

   106             gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);

   107             gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);

   108             gl.enableVertexAttribArray(0);

   109             gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);

   111             gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);

   112             gl.drawArrays(gl.TRIANGLES, 0, 3);

   113        }

   115        init();

   116        successfullyParsed = true;

   117     </script>

   118 </body>

   119 <script>finishTest();</script>

   121 <script>

   122 </script>

   124 </body>

   125 </html>

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