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

   1 <!DOCTYPE HTML>
   2 <title>WebGL test: bug 1003607</title>
   3 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   4 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
   5 <script src="driver-info.js"></script>
   6 <script src="webgl-util.js"></script>
   7 <body>
   8 <canvas id="c"></canvas>
   9 <script>
  10
  11 // Give ourselves a scope to return early from:
  12 (function() {
  13   var gl = c.getContext('webgl');
  14   if (!gl) {
  15     todo(false, 'WebGL is unavailable.');
  16     return;
  17   }
  18
  19   function checkGLError(func, info, reference) {
  20     var error = gl.getError();
  21     var prefix = info ? ('[' + info + '] ') : '';
  22     var text = 'gl.getError should be 0x' + reference.toString(16) +
  23                ', was 0x' + error.toString(16) + '.';
  24     func(error == reference, prefix + text);
  25   }
  26
  27   // Begin test:
  28   if (!gl.getExtension('OES_texture_float')) {
  29     todo(false, 'Not having this extension is fine.');
  30     return;
  31   }
  32   var tex = gl.createTexture();
  33   gl.bindTexture(gl.TEXTURE_2D, tex);
  34   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
  35   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
  36   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
  37   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
  38   checkGLError(ok, 'texture parameter setup should succeed', gl.NO_ERROR);
  39
  40   // Generate data
  41   var width = 2;
  42   var height = 2;
  43   var numChannels = 4;
  44   var data = new Float32Array(width * height * numChannels);
  45   for (var ii = 0; ii < data.length; ++ii) {
  46     data[ii] = 10000;
  47   }
  48   gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.FLOAT, data);
  49   checkGLError(ok, 'floating-point texture allocation should succeed', gl.NO_ERROR);
  50
  51   // Try respecifying data
  52   gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width, height, gl.RGBA, gl.FLOAT, data);
  53   checkGLError(ok, 'floating-point texture sub image should succeed', gl.NO_ERROR);
  54 })();
  55
  56 </script>