The Tor Browser: content/canvas/test/webgl-mochitest/test_no_arr

content/canvas/test/webgl-mochitest/test_no_arr_points.html@deefc01c0e14 (annotated)

content/canvas/test/webgl-mochitest/test_no_arr_points.html

Thu, 15 Jan 2015 21:03:48 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 15 Jan 2015 21:03:48 +0100
branch: TOR_BUG_9701
changeset 11: deefc01c0e14
permissions: -rw-r--r--

Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)

 <!DOCTYPE HTML>
 <title>WebGL test: Drawing without attrib arrays</title>
 <script src="/tests/SimpleTest/SimpleTest.js"></script>
 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
 <script src="driver-info.js"></script>
 <script src="webgl-util.js"></script>
 <script id="vs-no-attrib" type="x-shader/x-vertex">
 void main(void) {
   gl_PointSize = 64.0;
   gl_Position = vec4(vec3(0.0), 1.0);
 }
 </script>
 <script id="vs-attrib" type="x-shader/x-vertex">
 attribute vec3 aPosition;
 void main(void) {
   gl_PointSize = 64.0;
   gl_Position = vec4(aPosition, 1.0);
 }
 </script>
 <script id="fs" type="x-shader/x-fragment">
 precision mediump float;
 void main(void) {
   gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
 }
 </script>
 <body>
 <canvas id="c" width="64" height="64"></canvas>
 <script>
 // Give ourselves a scope to return early from:
 (function() {
   var gl = WebGLUtil.getWebGL('c');
   if (!gl) {
     todo(false, 'WebGL is unavailable.');
     return;
   }
   function errorFunc(str) {
     ok(false, 'Error: ' + str);
   }
   WebGLUtil.setErrorFunc(errorFunc);
   WebGLUtil.setWarningFunc(errorFunc);
   var attribProg   = WebGLUtil.createProgramByIds(gl, 'vs-attrib',    'fs');
   var noAttribProg = WebGLUtil.createProgramByIds(gl, 'vs-no-attrib', 'fs');
   if (!attribProg || !noAttribProg) {
     ok(false, 'Program linking should succeed.');
     return;
   }
   attribProg.aPosition = gl.getAttribLocation(attribProg, "aPosition");
   ok(attribProg.aPosition >= 0, '`aPosition` should be valid.');
   function isScreenBlack() {
     var pixels = gl.drawingBufferWidth * gl.drawingBufferHeight;
     var data = new Uint8Array(4 * pixels);
     gl.readPixels(0, 0,
                   gl.drawingBufferWidth, gl.drawingBufferHeight,
                   gl.RGBA, gl.UNSIGNED_BYTE,
                   data);
     var accum = 0;
     for (var i = 0; i < pixels; i++) {
       accum += data[4*i + 0];
       accum += data[4*i + 1];
       accum += data[4*i + 2];
     }
     return accum == 0;
   }
   function checkGLError(func, info) {
     var error = gl.getError();
     func(!error, '[' + info + '] gl.getError should be 0, was 0x' + error.toString(16) + '.');
   }
   function testDrawing(info) {
     var cruelNumber = 1024*1024;
     // Really, we should test for INT32_MAX-1 here, but we don't gracefully chunk these calls,
     // and so try to create a VBO of size INT32_MAX-1 to pretend that vert attrib 0 is an array.
     // (INT32_MAX-1 because we check that `first+count` is a valid GLsizei, which is int32_t)
     var UINT16_MAX  = 0xffff;
     var INT32_MAX   = 0x7fffffff;
     var UINT32_MAX  = 0xffffffff;
     // `first` needs room for `first+count` <= sizeof(GLsizei) == INT32_MAX
     var hugeFirst = Math.min(cruelNumber, INT32_MAX-1);
     var hugeIndex = Math.min(cruelNumber, UINT32_MAX);
     var indexType = gl.UNSIGNED_SHORT;
     var indexStride = 2;
     var indexArr = new Uint16Array([0, 1, Math.min(hugeIndex, UINT16_MAX)]);
     if (gl.getExtension('OES_element_index_uint')) {
       indexType = gl.UNSIGNED_INT;
       indexStride = 4;
       indexArr = new Uint32Array([0, 1, hugeIndex]);
     }
     gl.clear(gl.COLOR_BUFFER_BIT);
     gl.drawArrays(gl.POINTS, 0, 1);
     ok(!isScreenBlack(), '[' + info + '] drawArrays should color pixels.');
     gl.clear(gl.COLOR_BUFFER_BIT);
     gl.drawArrays(gl.POINTS, hugeFirst, 1);
     ok(!isScreenBlack(), '[' + info + '] drawArrays[huge first] should color pixels.');
     checkGLError(ok, info);
     var elemTestFunc = todo; // We fail on most implementations.
     var checkGLTestFunc = todo;
     if (DriverInfo.getDriver() == DriverInfo.DRIVER.ANGLE ||
         DriverInfo.getOS() == DriverInfo.OS.ANDROID)
     {
       // ANGLE and Android slaves seem to work fine.
       elemTestFunc = ok;
       checkGLTestFunc = ok;
     }
     if (DriverInfo.getDriver() == DriverInfo.DRIVER.ANDROID_X86_EMULATOR ||
         DriverInfo.getOS() == DriverInfo.OS.B2G)
     {
       // ...but the Android 4.2 x86 emulator environment is different
       elemTestFunc = todo;
       checkGLTestFunc = ok;
     }
     // Now for drawElements:
     gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.createBuffer());
     gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indexArr, gl.STATIC_DRAW);
     gl.clear(gl.COLOR_BUFFER_BIT);
     gl.drawElements(gl.POINTS, 1, indexType, 0);
     elemTestFunc(!isScreenBlack(), '[' + info + '] drawElements[0] should color pixels.');
     gl.clear(gl.COLOR_BUFFER_BIT);
     gl.drawElements(gl.POINTS, 1, indexType, 1*indexStride);
     elemTestFunc(!isScreenBlack(), '[' + info + '] drawElements[1] should color pixels.');
     gl.clear(gl.COLOR_BUFFER_BIT);
     gl.drawElements(gl.POINTS, 1, indexType, 2*indexStride);
     elemTestFunc(!isScreenBlack(), '[' + info + '] drawElements[huge offset] should color pixels.');
     checkGLError(checkGLTestFunc, info);
   }
   // Begin drawing
   gl.clearColor(0.0, 0.0, 0.0, 1.0);
   gl.disable(gl.DEPTH_TEST);
   // No-attrib prog:
   gl.useProgram(noAttribProg);
   testDrawing('no-attrib');
   // One-attrib, no-array prog:
   gl.useProgram(attribProg);
   gl.disableVertexAttribArray(attribProg.aPosition);
   gl.vertexAttrib3fv(attribProg.aPosition, [0.0, 0.0, 0.0]);
   testDrawing('one-attrib, no-array');
 })();
 </script>

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content/canvas/test/webgl-mochitest/test_no_arr_points.html@deefc01c0e14 (annotated)

content/canvas/test/webgl-mochitest/test_no_arr_points.html