third_party/WebKit/LayoutTests/fast/canvas/webgl/uniform-location-length-limits.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <meta charset="utf-8">
   5 <title>WebGL uniform location length tests</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="example" width="50" height="50">
  12 There is supposed to be an example drawing here, but it's not important.
  13 </canvas>
  14 <div id="description">Verify limits on the lengths of uniform locations.</div>
  15 <div id="console"></div>
  16 <script id="goodVertexShader1" type="x-shader/x-vertex">
  17 // A vertex shader where the uniform name is long, but well below the limit.
  18 struct Nesting2 {
  19     vec4 identifier62CharactersLong_01234567890123456789012345678901234;
  20 };
  21
  22 struct Nesting1 {
  23     Nesting2 identifier64CharactersLong_0123456789012345678901234567890123456;
  24 };
  25
  26 uniform Nesting1 identifier70CharactersLong_01234567890123456789012345678901234567890;
  27
  28 void main() {
  29     gl_Position = identifier70CharactersLong_01234567890123456789012345678901234567890.identifier64CharactersLong_0123456789012345678901234567890123456.identifier62CharactersLong_01234567890123456789012345678901234;
  30 }
  31 </script>
  32 <script id="goodVertexShader2" type="x-shader/x-vertex">
  33 // A vertex shader where the needed uniform location is exactly 256 characters.
  34 struct Nesting2 {
  35     vec4 identifier62CharactersLong_01234567890123456789012345678901234;
  36 };
  37
  38 struct Nesting1 {
  39     Nesting2 identifier64CharactersLong_0123456789012345678901234567890123456;
  40 };
  41
  42 uniform Nesting1 identifier128CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789;
  43
  44 void main() {
  45     gl_Position = identifier128CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789.identifier64CharactersLong_0123456789012345678901234567890123456.identifier62CharactersLong_01234567890123456789012345678901234;
  46 }
  47 </script>
  48 <script id="badVertexShader" type="x-shader/x-vertex">
  49 // A vertex shader where the needed uniform location is 257 characters.
  50 struct Nesting2 {
  51     vec4 identifier63CharactersLong_012345678901234567890123456789012345;
  52 };
  53
  54 struct Nesting1 {
  55     Nesting2 identifier64CharactersLong_0123456789012345678901234567890123456;
  56 };
  57
  58 uniform Nesting1 identifier128CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789;
  59
  60 void main() {
  61     Nesting2 temp = identifier128CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789.identifier64CharactersLong_0123456789012345678901234567890123456;
  62     gl_Position = temp.identifier63CharactersLong_012345678901234567890123456789012345;
  63 }
  64 </script>
  65 <script id="fragmentShader" type="x-shader/x-fragment">
  66 precision mediump float;
  67
  68 void main() {
  69     gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
  70 }
  71 </script>
  72 <script>
  73 if (window.initNonKhronosFramework) {
  74     window.initNonKhronosFramework(false);
  75 }
  76
  77 if (window.internals)
  78     window.internals.settings.setWebGLErrorsToConsoleEnabled(false);
  79
  80 var wtu = WebGLTestUtils;
  81 var gl = wtu.create3DContext(document.getElementById("example"));
  82
  83 debug("Test uniform location underneath the length limit");
  84 var program = wtu.loadProgramFromScript(gl, "goodVertexShader1", "fragmentShader");
  85 shouldBe('gl.getProgramParameter(program, gl.LINK_STATUS)', 'true');
  86 var uniformLoc = gl.getUniformLocation(program, "identifier70CharactersLong_01234567890123456789012345678901234567890.identifier64CharactersLong_0123456789012345678901234567890123456.identifier62CharactersLong_01234567890123456789012345678901234");
  87 shouldBeNonNull('uniformLoc');
  88 wtu.glErrorShouldBe(gl, gl.NONE);
  89
  90 debug("Test uniform location exactly at the length limit");
  91 var program = wtu.loadProgramFromScript(gl, "goodVertexShader2", "fragmentShader");
  92 shouldBe('gl.getProgramParameter(program, gl.LINK_STATUS)', 'true');
  93 var uniformLoc = gl.getUniformLocation(program, "identifier128CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789.identifier64CharactersLong_0123456789012345678901234567890123456.identifier62CharactersLong_01234567890123456789012345678901234");
  94 shouldBeNonNull('uniformLoc');
  95 wtu.glErrorShouldBe(gl, gl.NONE);
  96
  97 debug("Test uniform location over the length limit");
  98 program = wtu.loadProgramFromScript(gl, "badVertexShader", "fragmentShader");
  99 wtu.glErrorShouldBe(gl, gl.NONE);
 100 shouldBe('gl.getProgramParameter(program, gl.LINK_STATUS)', 'true');
 101 var uniformLoc = gl.getUniformLocation(program, "identifier128CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789.identifier64CharactersLong_0123456789012345678901234567890123456.identifier63CharactersLong_012345678901234567890123456789012345");
 102 wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
 103 shouldBeNull('uniformLoc');
 104
 105 </script>
 106 </body>
 107 </html>