gl-vertexattribpointer.html (6056B)
1 <!-- 2 Copyright (c) 2019 The Khronos Group Inc. 3 Use of this source code is governed by an MIT-style license that can be 4 found in the LICENSE.txt file. 5 --> 6 7 <!DOCTYPE html> 8 <html> 9 <head> 10 <meta charset="utf-8"> 11 <title>WebGL vertexAttribPointer Conformance Tests</title> 12 <link rel="stylesheet" href="../../resources/js-test-style.css"/> 13 <script src="../../js/js-test-pre.js"></script> 14 <script src="../../js/webgl-test-utils.js"></script> 15 </head> 16 <body> 17 <div id="description"></div> 18 <div id="console"></div> 19 <canvas id="canvas" width="2" height="2"> </canvas> 20 <script> 21 "use strict"; 22 description("This test checks vertexAttribPointer behaviors in WebGL."); 23 24 debug(""); 25 debug("Canvas.getContext"); 26 27 var wtu = WebGLTestUtils; 28 var gl = wtu.create3DContext("canvas"); 29 if (!gl) { 30 testFailed("context does not exist"); 31 } else { 32 testPassed("context exists"); 33 34 debug(""); 35 debug("Checking gl.vertexAttribPointer."); 36 37 if (!gl.FIXED) { 38 gl.FIXED = 0x140C; 39 } 40 41 var vertexObject = gl.createBuffer(); 42 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); 43 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(0), gl.STATIC_DRAW); 44 45 46 gl.bindBuffer(gl.ARRAY_BUFFER, null); 47 gl.vertexAttribPointer(0, 1, gl.FLOAT, false, 0, 4); 48 wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, 49 "vertexAttribPointer should fail if no buffer is bound and `offset` is non-zero."); 50 51 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); 52 gl.vertexAttribPointer(0, 1, gl.FLOAT, false, 0, 0); 53 wtu.glErrorShouldBe(gl, gl.NO_ERROR); 54 55 gl.bindBuffer(gl.ARRAY_BUFFER, null); 56 gl.vertexAttribPointer(0, 1, gl.FLOAT, false, 0, 0); 57 wtu.glErrorShouldBe(gl, gl.NO_ERROR, 58 "vertexAttribPointer should succeed if no buffer is bound and `offset` is zero."); 59 60 gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject); 61 62 63 if (wtu.getDefault3DContextVersion() < 2) { 64 gl.vertexAttribPointer(0, 1, gl.INT, 0, 0, 0); 65 wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, 66 "vertexAttribPointer should not support INT"); 67 gl.vertexAttribPointer(0, 1, gl.UNSIGNED_INT, 0, 0, 0); 68 wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, 69 "vertexAttribPointer should not support UNSIGNED_INT"); 70 } 71 gl.vertexAttribPointer(0, 1, gl.FIXED, 0, 0, 0); 72 wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, 73 "vertexAttribPointer should not support FIXED"); 74 75 var checkVertexAttribPointer = function( 76 gl, err, reason, size, type, normalize, stride, offset) { 77 gl.vertexAttribPointer(0, size, type, normalize, stride, offset); 78 var succeeded = (err == gl.NO_ERROR); 79 wtu.glErrorShouldBe(gl, err, 80 "gl.vertexAttribPointer(0, " + size + 81 ", gl." + wtu.glEnumToString(gl, type) + 82 ", " + normalize + 83 ", " + stride + 84 ", " + offset + 85 ") should " + (succeeded ? "succeed " : "fail ") + reason); 86 if (succeeded) { 87 shouldBe('gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_SIZE)', size.toString()); 88 shouldBe('gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_TYPE)', 'gl.' + wtu.glEnumToString(gl, type)); 89 shouldBe('gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_NORMALIZED)', normalize.toString()); 90 shouldBe('gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_STRIDE)', stride.toString()); 91 shouldBe('gl.getVertexAttribOffset(0, gl.VERTEX_ATTRIB_ARRAY_POINTER)', offset.toString()); 92 } 93 } 94 95 var types = [ 96 { type:gl.BYTE, bytesPerComponent: 1 }, 97 { type:gl.UNSIGNED_BYTE, bytesPerComponent: 1 }, 98 { type:gl.SHORT, bytesPerComponent: 2 }, 99 { type:gl.UNSIGNED_SHORT, bytesPerComponent: 2 }, 100 { type:gl.FLOAT, bytesPerComponent: 4 }, 101 ]; 102 103 if (wtu.getDefault3DContextVersion() >= 2) { 104 types.push(...[ 105 { type:gl.INT, bytesPerComponent: 4 }, 106 { type:gl.UNSIGNED_INT, bytesPerComponent: 4 }, 107 { type:gl.HALF_FLOAT, bytesPerComponent: 2 }, 108 { type:gl.INT_2_10_10_10_REV, bytesPerComponent: 4, minSize: 4 }, 109 { type:gl.UNSIGNED_INT_2_10_10_10_REV, bytesPerComponent: 4, minSize: 4 }, 110 ]); 111 } 112 113 for (var ii = 0; ii < types.length; ++ii) { 114 var info = types[ii]; 115 debug(""); 116 for (var size = 1; size <= 4; ++size) { 117 debug(""); 118 debug("checking: " + wtu.glEnumToString(gl, info.type) + " with size " + size); 119 var bytesPerElement = size * info.bytesPerComponent; 120 var offsetSet = [ 121 0, 122 1, 123 info.bytesPerComponent - 1, 124 info.bytesPerComponent, 125 info.bytesPerComponent + 1, 126 info.bytesPerComponent * 2]; 127 for (var jj = 0; jj < offsetSet.length; ++jj) { 128 var offset = offsetSet[jj]; 129 for (var kk = 0; kk < offsetSet.length; ++kk) { 130 var stride = offsetSet[kk]; 131 var err = gl.NO_ERROR; 132 var reason = "" 133 if (offset % info.bytesPerComponent != 0) { 134 reason = "because offset is bad"; 135 err = gl.INVALID_OPERATION; 136 } 137 if (stride % info.bytesPerComponent != 0) { 138 reason = "because stride is bad"; 139 err = gl.INVALID_OPERATION; 140 } 141 if (size < info.minSize) { 142 reason = "because size < minSize"; 143 err = gl.INVALID_OPERATION; 144 } 145 checkVertexAttribPointer( 146 gl, err, reason, size, info.type, false, stride, offset); 147 } 148 var stride = Math.floor(255 / info.bytesPerComponent) * info.bytesPerComponent; 149 150 if (offset == 0) { 151 checkVertexAttribPointer( 152 gl, size < info.minSize ? gl.INVALID_OPERATION : gl.NO_ERROR, "at stride limit", 153 size, info.type, false, stride, offset); 154 checkVertexAttribPointer( 155 gl, size < info.minSize ? [gl.INVALID_OPERATION, gl.INVALID_VALUE] : gl.INVALID_VALUE, "over stride limit", 156 size, info.type, false, 157 stride + info.bytesPerComponent, offset); 158 } 159 } 160 } 161 } 162 } 163 164 debug(""); 165 var successfullyParsed = true; 166 167 </script> 168 <script src="../../js/js-test-post.js"></script> 169 170 </body> 171 </html>