Source code
Revision control
Copy as Markdown
Other Tools
<!--
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 texture size limit conformance test.</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>
<canvas id="example" width="32" height="32" style="width: 40px; height: 40px;"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description("Checks various size limits of textures")
var canvas;
function numLevelsFromSize(size) {
var levels = 0;
while ((size >> levels) > 0) {
++levels;
}
return levels;
}
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("example");
var tests = [
{ format: gl.ALPHA, type: gl.UNSIGNED_BYTE, size: 1, dataType: Uint8Array },
{ format: gl.LUMINANCE, type: gl.UNSIGNED_BYTE, size: 1, dataType: Uint8Array },
{ format: gl.LUMINANCE_ALPHA, type: gl.UNSIGNED_BYTE, size: 2, dataType: Uint8Array },
{ format: gl.RGB, type: gl.UNSIGNED_BYTE, size: 3, dataType: Uint8Array },
{ format: gl.RGB, type: gl.UNSIGNED_SHORT_5_6_5, size: 1, dataType: Uint16Array },
{ format: gl.RGBA, type: gl.UNSIGNED_BYTE, size: 4, dataType: Uint8Array },
{ format: gl.RGBA, type: gl.UNSIGNED_SHORT_4_4_4_4, size: 1, dataType: Uint16Array },
{ format: gl.RGBA, type: gl.UNSIGNED_SHORT_5_5_5_1, size: 1, dataType: Uint16Array }
];
// Note: We expressly only use 2 textures because first a texture will be defined
// using all mip levels of 1 format, then for a moment it will have mixed formats which
// may uncover bugs.
var targets = [
{ target: gl.TEXTURE_2D,
maxSize: gl.getParameter(gl.MAX_TEXTURE_SIZE),
maxLevel: 1000,
targets: [gl.TEXTURE_2D]
},
{ target: gl.TEXTURE_CUBE_MAP,
maxSize: gl.getParameter(gl.MAX_CUBE_MAP_TEXTURE_SIZE),
maxLevel: 5,
targets: [
gl.TEXTURE_CUBE_MAP_POSITIVE_X,
gl.TEXTURE_CUBE_MAP_NEGATIVE_X,
gl.TEXTURE_CUBE_MAP_POSITIVE_Y,
gl.TEXTURE_CUBE_MAP_NEGATIVE_Y,
gl.TEXTURE_CUBE_MAP_POSITIVE_Z,
gl.TEXTURE_CUBE_MAP_NEGATIVE_Z
]
}
];
gl.pixelStorei(gl.UNPACK_ALIGNMENT, 1);
var trg = 0;
var tt = 0;
var tex = null;
runNextTest();
function runNextTest() {
var t = targets[trg];
if (tt == 0) {
gl.deleteTexture(tex);
tex = gl.createTexture();
gl.bindTexture(t.target, tex);
debug("");
debug("max size for " + wtu.glEnumToString(gl, t.target) + ": " + t.maxSize);
var numLevels = numLevelsFromSize(t.maxSize);
debug("num levels " + numLevels);
}
var test = tests[tt];
testFormatType(t, test);
++tt;
if (tt == tests.length) {
tt = 0;
++trg;
if (trg == targets.length) {
finishTest();
return;
}
}
wtu.dispatchPromise(runNextTest);
}
function testFormatType(t, test) {
debug("");
debug("testing: " + wtu.glEnumToString(gl, test.format) + ", " + wtu.glEnumToString(gl, test.type));
for (var j = 0; j < t.targets.length; ++j) {
var target = t.targets[j];
debug("");
debug(wtu.glEnumToString(gl, target));
var numLevels = numLevelsFromSize(t.maxSize);
// out of bounds tests
for (var i = 0; i < numLevels; i++) {
// width and height out of bounds
var size = t.maxSize >> i;
gl.texImage2D(target, i, test.format, size + 1, size + 1, 0, test.format, test.type, null);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "width or height out of bounds: should generate INVALID_VALUE: level is " + i + ", size is "
+ (size + 1) + "x" + (size + 1));
}
// level out of bounds
gl.texImage2D(target, numLevels, test.format, 1, 1, 0, test.format, test.type, null);
wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "level out of bounds: should generate INVALID_VALUE: level is: "
+ numLevels + ", size is 1x1.");
// Probe to discover the max non-OOM level.
// For instance, on some drivers (at least Intel+Mesa) we can create
// a maxLevel L8 texture, but only a maxLevel-1 RGB8 texture.
var maxLevelsForFormat = numLevels;
while (true) {
gl.texImage2D(target, maxLevelsForFormat-1, test.format, 1, 1, 0, test.format, test.type, null);
var err = gl.getError();
if (err == gl.OUT_OF_MEMORY) {
debug("Probe failed for level=" + (maxLevelsForFormat-1) + ", reducing...");
maxLevelsForFormat -= 1;
if (!maxLevelsForFormat) {
testFailed("Failed to allocate any levels for format " + test.format);
return;
}
continue;
}
if (err) {
testFailed("Should not hit non-OOM errors during max level probing.");
return;
}
break;
}
var numTestLevels = Math.min(maxLevelsForFormat, t.maxLevel);
for (var l = 0; l < numTestLevels; ++l) {
// Do bottom levels first;
var size = 1 << l;
var level = maxLevelsForFormat - l - 1;
var otherDimension = t.target == gl.TEXTURE_2D ? 1 : size;
gl.texImage2D(target, level, test.format, size, otherDimension, 0, test.format, test.type, null);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no error for level: " + level + " " + size + "x" + otherDimension);
if (otherDimension != size) {
gl.texImage2D(target, level, test.format, otherDimension, size, 0, test.format, test.type, null);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no error for level: " + level + " " + otherDimension + "x" + size);
}
}
}
}
</script>
</body>
</html>