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<!--
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL vertexAttribPointer Conformance Tests</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<canvas id="canvas" width="2" height="2"> </canvas>
<script>
"use strict";
description("This test checks vertexAttribPointer behaviors in WebGL.");
debug("");
debug("Canvas.getContext");
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("canvas");
if (!gl) {
testFailed("context does not exist");
} else {
testPassed("context exists");
debug("");
debug("Checking gl.vertexAttribPointer.");
if (!gl.FIXED) {
gl.FIXED = 0x140C;
}
var vertexObject = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(0), gl.STATIC_DRAW);
gl.bindBuffer(gl.ARRAY_BUFFER, null);
gl.vertexAttribPointer(0, 1, gl.FLOAT, false, 0, 4);
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
"vertexAttribPointer should fail if no buffer is bound and `offset` is non-zero.");
gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
gl.vertexAttribPointer(0, 1, gl.FLOAT, false, 0, 0);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
gl.bindBuffer(gl.ARRAY_BUFFER, null);
gl.vertexAttribPointer(0, 1, gl.FLOAT, false, 0, 0);
wtu.glErrorShouldBe(gl, gl.NO_ERROR,
"vertexAttribPointer should succeed if no buffer is bound and `offset` is zero.");
gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
if (wtu.getDefault3DContextVersion() < 2) {
gl.vertexAttribPointer(0, 1, gl.INT, 0, 0, 0);
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM,
"vertexAttribPointer should not support INT");
gl.vertexAttribPointer(0, 1, gl.UNSIGNED_INT, 0, 0, 0);
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM,
"vertexAttribPointer should not support UNSIGNED_INT");
}
gl.vertexAttribPointer(0, 1, gl.FIXED, 0, 0, 0);
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM,
"vertexAttribPointer should not support FIXED");
var checkVertexAttribPointer = function(
gl, err, reason, size, type, normalize, stride, offset) {
gl.vertexAttribPointer(0, size, type, normalize, stride, offset);
var succeeded = (err == gl.NO_ERROR);
wtu.glErrorShouldBe(gl, err,
"gl.vertexAttribPointer(0, " + size +
", gl." + wtu.glEnumToString(gl, type) +
", " + normalize +
", " + stride +
", " + offset +
") should " + (succeeded ? "succeed " : "fail ") + reason);
if (succeeded) {
shouldBe('gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_SIZE)', size.toString());
shouldBe('gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_TYPE)', 'gl.' + wtu.glEnumToString(gl, type));
shouldBe('gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_NORMALIZED)', normalize.toString());
shouldBe('gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_STRIDE)', stride.toString());
shouldBe('gl.getVertexAttribOffset(0, gl.VERTEX_ATTRIB_ARRAY_POINTER)', offset.toString());
}
}
var types = [
{ type:gl.BYTE, bytesPerComponent: 1 },
{ type:gl.UNSIGNED_BYTE, bytesPerComponent: 1 },
{ type:gl.SHORT, bytesPerComponent: 2 },
{ type:gl.UNSIGNED_SHORT, bytesPerComponent: 2 },
{ type:gl.FLOAT, bytesPerComponent: 4 },
];
if (wtu.getDefault3DContextVersion() >= 2) {
types.push(...[
{ type:gl.INT, bytesPerComponent: 4 },
{ type:gl.UNSIGNED_INT, bytesPerComponent: 4 },
{ type:gl.HALF_FLOAT, bytesPerComponent: 2 },
{ type:gl.INT_2_10_10_10_REV, bytesPerComponent: 4, minSize: 4 },
{ type:gl.UNSIGNED_INT_2_10_10_10_REV, bytesPerComponent: 4, minSize: 4 },
]);
}
for (var ii = 0; ii < types.length; ++ii) {
var info = types[ii];
debug("");
for (var size = 1; size <= 4; ++size) {
debug("");
debug("checking: " + wtu.glEnumToString(gl, info.type) + " with size " + size);
var bytesPerElement = size * info.bytesPerComponent;
var offsetSet = [
0,
1,
info.bytesPerComponent - 1,
info.bytesPerComponent,
info.bytesPerComponent + 1,
info.bytesPerComponent * 2];
for (var jj = 0; jj < offsetSet.length; ++jj) {
var offset = offsetSet[jj];
for (var kk = 0; kk < offsetSet.length; ++kk) {
var stride = offsetSet[kk];
var err = gl.NO_ERROR;
var reason = ""
if (offset % info.bytesPerComponent != 0) {
reason = "because offset is bad";
err = gl.INVALID_OPERATION;
}
if (stride % info.bytesPerComponent != 0) {
reason = "because stride is bad";
err = gl.INVALID_OPERATION;
}
if (size < info.minSize) {
reason = "because size < minSize";
err = gl.INVALID_OPERATION;
}
checkVertexAttribPointer(
gl, err, reason, size, info.type, false, stride, offset);
}
var stride = Math.floor(255 / info.bytesPerComponent) * info.bytesPerComponent;
if (offset == 0) {
checkVertexAttribPointer(
gl, size < info.minSize ? gl.INVALID_OPERATION : gl.NO_ERROR, "at stride limit",
size, info.type, false, stride, offset);
checkVertexAttribPointer(
gl, size < info.minSize ? [gl.INVALID_OPERATION, gl.INVALID_VALUE] : gl.INVALID_VALUE, "over stride limit",
size, info.type, false,
stride + info.bytesPerComponent, offset);
}
}
}
}
}
debug("");
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
