dom/canvas/test/webgl-mochitest/test_tex_pbo.html

   1 <!DOCTYPE HTML>
   2 <html>
   3   <head>
   4     <meta charset='UTF-8'>
   5     <script src='/tests/SimpleTest/SimpleTest.js'></script>
   6     <link rel='stylesheet' href='/tests/SimpleTest/test.css'>
   7   </head>
   8   <body>
   9     <script>
  10
  11 function shouldBe(testStr, refStr) {
  12   ok(testStr == refStr, 'Expected "' + refStr + '", was "' + testStr + '".');
  13 }
  14
  15 function getErrorStr(gl, err) {
  16   if (!err) return "NO_ERROR";
  17   for (const k in gl) {
  18     const v = gl[k];
  19     if (v == err) {
  20       return k;
  21     }
  22   }
  23   return `<${err}>`;
  24 }
  25
  26 function glErrorShouldBe(gl, expected, opt_info) {
  27   if (opt_info) {
  28     opt_info = opt_info + ': '
  29   } else {
  30     opt_info = '';
  31   }
  32
  33   if (!expected.length) {
  34     expected = [expected];
  35   }
  36   expected = expected.map(x => getErrorStr(gl, x));
  37   let was = gl.getError();
  38   was = getErrorStr(gl, was);
  39   console.log(expected);
  40   ok(expected.includes(was),
  41     `${opt_info}Expected gl.getError() in [${expected}], was ${was}.`);
  42 }
  43
  44 (() => {
  45   const gl = document.createElement('canvas').getContext('webgl2');
  46   if (!gl) {
  47     todo(false, 'No webgl2, skipping...');
  48     return;
  49   }
  50   const pbo = gl.createBuffer();
  51   gl.bindBuffer(gl.PIXEL_UNPACK_BUFFER, pbo);
  52
  53   const PBO_DATA = new Uint8Array([
  54     255, 0, 0, 255,
  55     0, 255, 0, 255,
  56   ]);
  57   gl.bufferData(gl.PIXEL_UNPACK_BUFFER, PBO_DATA, gl.STATIC_DRAW);
  58
  59   const tex = gl.createTexture();
  60   gl.bindTexture(gl.TEXTURE_2D, tex);
  61
  62   const fb = gl.createFramebuffer();
  63   gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
  64   gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
  65
  66   const readback = new Uint8Array(4);
  67
  68   const PBO_LIST = [null, pbo];
  69   for (const cur of PBO_LIST) {
  70     gl.bindBuffer(gl.PIXEL_UNPACK_BUFFER, cur);
  71
  72     function tryUpload(arg, expectedReadback) {
  73       let argType = typeof(arg);
  74       if (arg === null) {
  75         argType = 'null';
  76       }
  77       const argForPbo = (argType == 'number');
  78       const pboBound = !!cur;
  79       const expectedErr = (argForPbo == pboBound) ? 0 : gl.INVALID_OPERATION;
  80       gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA8, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE,
  81                     arg);
  82       const with_without = pboBound ? 'with' : 'without';
  83       glErrorShouldBe(gl, expectedErr, `${with_without} pbo, texImage(..., ${argType}("${arg}"))`);
  84
  85       if (expectedErr) return;
  86       gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, readback);
  87       shouldBe(expectedReadback.toString(), readback.toString());
  88     }
  89
  90     const CPU_DATA = new Uint8Array([255, 255, 0, 255]);
  91
  92     tryUpload(null, [0,0,0,0]);
  93     tryUpload(CPU_DATA, CPU_DATA);
  94     tryUpload(0, PBO_DATA.slice(0,4));
  95     tryUpload(4, PBO_DATA.slice(4));
  96   }
  97 })();
  98     </script>
  99   </body>
 100 </html>