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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 vertexAttribIPointer 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 vertexAttribIPointer behaviors in WebGL 2.");
debug("");
debug("Canvas.getContext");
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("canvas", undefined, 2);
if (!gl) {
testFailed("context does not exist");
} else {
testPassed("context exists");
debug("");
debug("Checking gl.vertexAttribIPointer.");
gl.vertexAttribIPointer(0, 3, gl.INT, 0, 0);
wtu.glErrorShouldBe(gl, gl.NO_ERROR,
"vertexAttribIPointer should succeed if no buffer is bound and offset is zero");
gl.vertexAttribIPointer(0, 3, gl.INT, 0, 12);
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
"vertexAttribIPointer should fail if no buffer is bound and offset is non-zero");
var vertexObject = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
gl.bufferData(gl.ARRAY_BUFFER, new Int32Array(0), gl.STATIC_DRAW);
gl.vertexAttribIPointer(0, 1, gl.FLOAT, 0, 0);
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM,
"vertexAttribIPointer should not support FLOAT");
var checkVertexAttribIPointer = function(
gl, err, reason, size, type, stride, offset) {
gl.vertexAttribIPointer(0, size, type, stride, offset);
wtu.glErrorShouldBe(gl, err,
"gl.vertexAttribIPointer(0, " + size +
", gl." + wtu.glEnumToString(gl, type) +
", " + stride +
", " + offset +
") should " + (err == gl.NO_ERROR ? "succeed " : "fail ") + reason);
}
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.INT, bytesPerComponent: 4 },
{ type:gl.UNSIGNED_INT, bytesPerComponent: 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;
}
checkVertexAttribIPointer(
gl, err, reason, size, info.type, stride, offset);
}
var stride = Math.floor(255 / info.bytesPerComponent) * info.bytesPerComponent;
if (offset == 0) {
checkVertexAttribIPointer(
gl, gl.NO_ERROR, "at stride limit",
size, info.type, stride, offset);
checkVertexAttribIPointer(
gl, gl.INVALID_VALUE, "over stride limit",
size, info.type, stride + info.bytesPerComponent, offset);
}
}
}
}
}
debug("");
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
