third_party/WebKit/LayoutTests/fast/canvas/webgl/index-validation.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <meta charset="utf-8">
   5 <script src="../../../resources/js-test.js"></script>
   6 <script src="resources/webgl-test.js"></script>
   7 </head>
   8 <body>
   9 <div id="description"></div>
  10 <div id="console"></div>
  11
  12 <script>
  13 description("Tests that index validation verifies the correct number of indices");
  14
  15 if (window.internals)
  16     window.internals.settings.setWebGLErrorsToConsoleEnabled(false);
  17
  18 function sizeInBytes(type) {
  19   switch (type) {
  20   case gl.BYTE:
  21   case gl.UNSIGNED_BYTE:
  22     return 1;
  23   case gl.SHORT:
  24   case gl.UNSIGNED_SHORT:
  25     return 2;
  26   case gl.INT:
  27   case gl.UNSIGNED_INT:
  28   case gl.FLOAT:
  29     return 4;
  30   default:
  31     throw "unknown type";
  32   }
  33 }
  34
  35 var gl = create3DContext();
  36 var program = loadStandardProgram(gl);
  37
  38 // 3 vertices => 1 triangle, interleaved data
  39 var dataComplete = new Float32Array([0, 0, 0, 1,
  40                                      0, 0, 1,
  41                                      1, 0, 0, 1,
  42                                      0, 0, 1,
  43                                      1, 1, 1, 1,
  44                                      0, 0, 1]);
  45 var dataIncomplete = new Float32Array([0, 0, 0, 1,
  46                                        0, 0, 1,
  47                                        1, 0, 0, 1,
  48                                        0, 0, 1,
  49                                        1, 1, 1, 1]);
  50 var indices = new Uint16Array([0, 1, 2]);
  51
  52 debug("Testing with valid indices");
  53
  54 var bufferComplete = gl.createBuffer();
  55 gl.bindBuffer(gl.ARRAY_BUFFER, bufferComplete);
  56 gl.bufferData(gl.ARRAY_BUFFER, dataComplete, gl.STATIC_DRAW);
  57 var elements = gl.createBuffer();
  58 gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, elements);
  59 gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW);
  60 gl.useProgram(program);
  61 var vertexLoc = gl.getAttribLocation(program, "a_vertex");
  62 var normalLoc = gl.getAttribLocation(program, "a_normal");
  63 gl.vertexAttribPointer(vertexLoc, 4, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), 0);
  64 gl.enableVertexAttribArray(vertexLoc);
  65 gl.vertexAttribPointer(normalLoc, 3, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), 4 * sizeInBytes(gl.FLOAT));
  66 gl.enableVertexAttribArray(normalLoc);
  67 shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
  68 glErrorShouldBe(gl, gl.NO_ERROR);
  69 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
  70 glErrorShouldBe(gl, gl.NO_ERROR);
  71
  72 debug("Testing with out-of-range indices");
  73
  74 var bufferIncomplete = gl.createBuffer();
  75 gl.bindBuffer(gl.ARRAY_BUFFER, bufferIncomplete);
  76 gl.bufferData(gl.ARRAY_BUFFER, dataIncomplete, gl.STATIC_DRAW);
  77 gl.vertexAttribPointer(vertexLoc, 4, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), 0);
  78 gl.enableVertexAttribArray(vertexLoc);
  79 gl.disableVertexAttribArray(normalLoc);
  80 debug("Enable vertices, valid");
  81 glErrorShouldBe(gl, gl.NO_ERROR);
  82 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
  83 glErrorShouldBe(gl, gl.NO_ERROR);
  84 debug("Enable normals, out-of-range");
  85 gl.vertexAttribPointer(normalLoc, 3, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), 4 * sizeInBytes(gl.FLOAT));
  86 gl.enableVertexAttribArray(normalLoc);
  87 glErrorShouldBe(gl, gl.NO_ERROR);
  88 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
  89 glErrorShouldBe(gl, gl.INVALID_OPERATION);
  90
  91 debug("Test with enabled attribute that does not belong to current program");
  92
  93 gl.disableVertexAttribArray(normalLoc);
  94 var extraLoc = Math.max(vertexLoc, normalLoc) + 1;
  95 gl.enableVertexAttribArray(extraLoc);
  96 debug("Enable an extra attribute with null");
  97 glErrorShouldBe(gl, gl.NO_ERROR);
  98 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
  99 glErrorShouldBe(gl, gl.INVALID_OPERATION);
 100 debug("Enable an extra attribute with insufficient data buffer");
 101 gl.vertexAttribPointer(extraLoc, 3, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), 4 * sizeInBytes(gl.FLOAT));
 102 glErrorShouldBe(gl, gl.NO_ERROR);
 103 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
 104 debug("Pass large negative index to vertexAttribPointer");
 105 gl.vertexAttribPointer(normalLoc, 3, gl.FLOAT, false, 7 * sizeInBytes(gl.FLOAT), -2000000000 * sizeInBytes(gl.FLOAT));
 106 glErrorShouldBe(gl, gl.INVALID_VALUE);
 107 shouldBeUndefined('gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)');
 108
 109 successfullyParsed = true;
 110 </script>
 111
 112 </body>
 113 </html>