test_texsubimage_float.html

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<title>WebGL test: bug 1003607</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>

<body>

<canvas id="c"></canvas>

<script>

// Give ourselves a scope to return early from:

(function() {

  var gl = c.getContext('webgl');

  if (!gl) {

    todo(false, 'WebGL is unavailable.');

    return;

  function checkGLError(func, info, reference) {

    var error = gl.getError();

    var prefix = info ? ('[' + info + '] ') : '';

    var text = 'gl.getError should be 0x' + reference.toString(16) +

               ', was 0x' + error.toString(16) + '.';

    func(error == reference, prefix + text);

  // Begin test:

  if (!gl.getExtension('OES_texture_float')) {

    todo(false, 'Not having this extension is fine.');

    return;

  var tex = gl.createTexture();

  gl.bindTexture(gl.TEXTURE_2D, tex);

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);

  checkGLError(ok, 'texture parameter setup should succeed', gl.NO_ERROR);

  // Generate data

  var width = 2;

  var height = 2;

  var numChannels = 4;

  var data = new Float32Array(width * height * numChannels);

  for (var ii = 0; ii < data.length; ++ii) {

    data[ii] = 10000;

  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.FLOAT, data);

  checkGLError(ok, 'floating-point texture allocation should succeed', gl.NO_ERROR);

  // Try respecifying data

  gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width, height, gl.RGBA, gl.FLOAT, data);

  checkGLError(ok, 'floating-point texture sub image should succeed', gl.NO_ERROR);

})();

</script>