third_party/WebKit/LayoutTests/fast/canvas/webgl/shader-precision-format.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <meta charset="utf-8">
   5 <title>WebGL shader precision format test.</title>
   6 <script src="../../../resources/js-test.js"></script>
   7 <script src="resources/webgl-test.js"> </script>
   8 <script src="resources/webgl-test-utils.js"> </script>
   9 </head>
  10 <body>
  11 <canvas id="canvas" width="2" height="2" style="width: 40px; height: 40px;"></canvas>
  12 <div id="description"></div>
  13 <div id="console"></div>
  14 <script>
  15 if (window.initNonKhronosFramework) {
  16     window.initNonKhronosFramework(true);
  17 }
  18
  19 if (window.internals)
  20     window.internals.settings.setWebGLErrorsToConsoleEnabled(false);
  21
  22 var wtu = WebGLTestUtils;
  23 description(document.title);
  24 debug("Tests that WebGLShaderPrecisionFormat class and getShaderPrecisionFormat work.");
  25 debug("");
  26 var gl = create3DContext(document.getElementById("canvas"));
  27
  28 function verifyShaderPrecisionFormat(shadertype, precisiontype) {
  29     shouldBeTrue('gl.getShaderPrecisionFormat(' + shadertype + ', ' +
  30                  precisiontype + ') instanceof WebGLShaderPrecisionFormat');
  31 }
  32
  33 debug("");
  34 debug("Test that getShaderPrecisionFormat returns a WebGLShaderPrecisionFormat object.");
  35 debug("");
  36
  37 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.LOW_FLOAT');
  38 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.MEDIUM_FLOAT');
  39 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.HIGH_FLOAT');
  40 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.LOW_INT');
  41 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.MEDIUM_INT');
  42 verifyShaderPrecisionFormat('gl.VERTEX_SHADER', 'gl.HIGH_INT');
  43 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.LOW_FLOAT');
  44 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.MEDIUM_FLOAT');
  45 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.HIGH_FLOAT');
  46 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.LOW_INT');
  47 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.MEDIUM_INT');
  48 verifyShaderPrecisionFormat('gl.FRAGMENT_SHADER', 'gl.HIGH_INT');
  49
  50 debug("");
  51 debug("Test that getShaderPrecisionFormat throws an error with invalid parameters.");
  52 debug("");
  53
  54 shouldGenerateGLError(gl, gl.INVALID_ENUM, 'gl.getShaderPrecisionFormat(gl.HIGH_INT, gl.VERTEX_SHADER)');
  55
  56 debug("");
  57 debug("Test that WebGLShaderPrecisionFormat values are sensible.");
  58 debug("");
  59
  60 // The minimum values are from OpenGL ES Shading Language spec, section 4.5.
  61
  62 var shaderPrecisionFormat = gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.LOW_FLOAT);
  63 shouldBeTrue('shaderPrecisionFormat.rangeMin >= 1');
  64 shouldBeTrue('shaderPrecisionFormat.rangeMax >= 1');
  65 shouldBeTrue('shaderPrecisionFormat.precision >= 8');
  66
  67 shaderPrecisionFormat = gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.MEDIUM_FLOAT);
  68 shouldBeTrue('shaderPrecisionFormat.rangeMin >= 14');
  69 shouldBeTrue('shaderPrecisionFormat.rangeMax >= 14');
  70 shouldBeTrue('shaderPrecisionFormat.precision >= 10');
  71
  72 shaderPrecisionFormat = gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.HIGH_FLOAT);
  73 shouldBeTrue('shaderPrecisionFormat.rangeMin >= 62');
  74 shouldBeTrue('shaderPrecisionFormat.rangeMax >= 62');
  75 shouldBeTrue('shaderPrecisionFormat.precision >= 16');
  76
  77 shaderPrecisionFormat = gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.LOW_INT);
  78 shouldBeTrue('shaderPrecisionFormat.rangeMin >= 8');
  79 shouldBeTrue('shaderPrecisionFormat.rangeMax >= 8');
  80 shouldBeTrue('shaderPrecisionFormat.precision == 0');
  81
  82 shaderPrecisionFormat = gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.MEDIUM_INT);
  83 shouldBeTrue('shaderPrecisionFormat.rangeMin >= 10');
  84 shouldBeTrue('shaderPrecisionFormat.rangeMax >= 10');
  85 shouldBeTrue('shaderPrecisionFormat.precision == 0');
  86
  87 shaderPrecisionFormat = gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.HIGH_INT);
  88 shouldBeTrue('shaderPrecisionFormat.rangeMin >= 16');
  89 shouldBeTrue('shaderPrecisionFormat.rangeMax >= 16');
  90 shouldBeTrue('shaderPrecisionFormat.precision == 0');
  91
  92 debug("");
  93 debug("Test that getShaderPrecisionFormat returns the same thing every call.");
  94 debug("");
  95
  96 shaderPrecisionFormat = gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.LOW_FLOAT);
  97 var shaderPrecisionFormat2 = gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.LOW_FLOAT);
  98 shouldBeTrue('shaderPrecisionFormat.rangeMin == shaderPrecisionFormat2.rangeMin');
  99 shouldBeTrue('shaderPrecisionFormat.rangeMax == shaderPrecisionFormat2.rangeMax');
 100 shouldBeTrue('shaderPrecisionFormat.precision == shaderPrecisionFormat2.precision');
 101
 102 finishTest();
 103 </script>
 104
 105 </body>
 106 </html>
 107
 108