dom/canvas/test/webgl-conf/checkout/conformance2/attribs/gl-vertexattribipointer-offsets.html

   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>vertexAttribIPointer offsets 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 <canvas id="example" width="50" height="50">
  18 There is supposed to be an example drawing here, but it's not important.
  19 </canvas>
  20 <div id="description"></div>
  21 <div id="console"></div>
  22 <script id="vshader" type="x-shader/x-vertex">#version 300 es
  23 layout(location=0) in ivec4 aPosition;
  24 layout(location=1) in vec4 aColor;
  25 out vec4 vColor;
  26 void main()
  27 {
  28     gl_Position = vec4(aPosition);
  29     vColor = aColor;
  30 }
  31 </script>
  32
  33 <script id="vshader_unsigned" type="x-shader/x-vertex">#version 300 es
  34 layout(location=0) in uvec4 aPosition;
  35 layout(location=1) in vec4 aColor;
  36 out vec4 vColor;
  37 void main()
  38 {
  39     gl_Position = vec4(aPosition);
  40     vColor = aColor;
  41 }
  42
  43 </script>
  44 <script id="fshader" type="x-shader/x-fragment">#version 300 es
  45 precision mediump float;
  46 in vec4 vColor;
  47 layout(location=0) out vec4 oColor;
  48 void main()
  49 {
  50     oColor = vColor;
  51 }
  52 </script>
  53
  54 <script>
  55 "use strict";
  56 function init()
  57 {
  58     description("test vertexAttribIPointer offsets work");
  59
  60     var wtu = WebGLTestUtils;
  61     var gl = wtu.create3DContext("example", undefined, 2);
  62     var program = wtu.setupProgram(gl, ["vshader", "fshader"]);
  63     var program_unsigned = wtu.setupProgram(gl, ["vshader_unsigned", "fshader"]);
  64
  65     var tests = [
  66       { data: new Int32Array([ 0, 1, 0, 1, 0, 0, 0, 0, 0 ]),
  67         type: gl.INT,
  68         componentSize: 4,
  69       },
  70       { data: new Uint32Array([ 0, 1, 0, 1, 0, 0, 0, 0, 0 ]),
  71         type: gl.UNSIGNED_INT,
  72         componentSize: 4,
  73       },
  74       { data: new Uint16Array([ 0, 32767, 0, 32767, 0, 0, 0, 0, 0 ]),
  75         type: gl.SHORT,
  76         componentSize: 2,
  77       },
  78       { data: new Uint16Array([ 0, 65535, 0, 65535, 0, 0, 0, 0, 0 ]),
  79         type: gl.UNSIGNED_SHORT,
  80         componentSize: 2,
  81       },
  82       { data: new Uint8Array([ 0, 127, 0, 127, 0, 0, 0, 0, 0 ]),
  83         type: gl.BYTE,
  84         componentSize: 1,
  85       },
  86       { data: new Uint8Array([ 0, 1, 0, 1, 0, 0, 0, 0, 0 ]),
  87         type: gl.UNSIGNED_BYTE,
  88         componentSize: 1,
  89       }
  90     ];
  91
  92     var vertexObject = gl.createBuffer();
  93     gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
  94     gl.bufferData(gl.ARRAY_BUFFER, 1024, gl.STATIC_DRAW);
  95     gl.enableVertexAttribArray(0);
  96
  97     var kNumVerts = 3;
  98     var kNumComponents = 3;
  99
 100     var count = 0;
 101     for (var tt = 0; tt < tests.length; ++tt) {
 102         var test = tests[tt];
 103         for (var oo = 0; oo < 3; ++oo) {
 104             for (var ss = 0; ss < 3; ++ss) {
 105                 var offset = (oo + 1) * test.componentSize;
 106                 var color = (count % 2) ? [1, 0, 0, 1] : [0, 1, 0, 1];
 107                 var stride = test.componentSize * kNumComponents + test.componentSize * ss;
 108                 debug("");
 109                 debug("check with " + wtu.glEnumToString(gl, test.type) + " at offset: " + offset + " with stride:" + stride);
 110                 if (test.type == gl.INT || test.type == gl.SHORT || test.type == gl.BYTE) {
 111                     gl.useProgram(program);
 112                 } else {
 113                     gl.useProgram(program_unsigned);
 114                 }
 115                 gl.vertexAttrib4fv(1, color);
 116                 var data = new Uint8Array(test.componentSize * kNumVerts * kNumComponents + stride * (kNumVerts - 1));
 117                 var view = new Uint8Array(test.data.buffer);
 118                 var size = test.componentSize * kNumComponents;
 119                 for (var jj = 0; jj < kNumVerts; ++jj) {
 120                     var off1 = jj * size;
 121                     var off2 = jj * stride;
 122                     for (var zz = 0; zz < size; ++zz) {
 123                         data[off2 + zz] = view[off1 + zz];
 124                     }
 125                 }
 126                 gl.bufferSubData(gl.ARRAY_BUFFER, offset, data);
 127                 gl.vertexAttribIPointer(0, 3, test.type, stride, offset);
 128                 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
 129                 gl.drawArrays(gl.TRIANGLES, 0, 3);
 130
 131                 var buf = new Uint8Array(50 * 50 * 4);
 132                 gl.readPixels(0, 0, 50, 50, gl.RGBA, gl.UNSIGNED_BYTE, buf);
 133
 134                 var black = [0, 0, 0, 0];
 135                 var other = [color[0] * 255, color[1] * 255, color[2] * 255, color[3] * 255];
 136                 var otherMsg = "should be " + ((count % 2) ? "red" : "green")
 137                 wtu.checkCanvasRect(gl, 0, 0, 1, 1, black, "should be black", 0);
 138                 wtu.checkCanvasRect(gl, 0, 49, 1, 1, black, "should be black", 0);
 139                 wtu.checkCanvasRect(gl, 26, 40, 1, 1, other, otherMsg, 0);
 140                 wtu.checkCanvasRect(gl, 26, 27, 1, 1, other, otherMsg, 0);
 141                 wtu.checkCanvasRect(gl, 40, 27, 1, 1, other, otherMsg, 0);
 142                 ++count;
 143             }
 144         }
 145     }
 146 }
 147
 148 init();
 149 var successfullyParsed = true;
 150 </script>
 151 <script src="../../js/js-test-post.js"></script>
 152
 153 </body>
 154 </html>