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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>
<title>Verify copyTexImage2D follows format restictions</title>
<meta charset="utf-8">
<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>
<canvas id="canvas" width="2" height="2"></canvas>
<canvas id="canvasNoAlpha" width="2" height="2"></canvas>
<div id="console"></div>
<script>
"use strict";
function getChannelsFromFormat(format) {
switch (gl[format]) {
case gl.ALPHA:
return 0x0001;
case gl.LUMINANCE:
case gl.RGB:
return 0x1110;
case gl.LUMINANCE_ALPHA:
case gl.RGBA:
return 0x1111;
default:
return 0;
}
}
var formats = [
'ALPHA',
'LUMINANCE',
'LUMINANCE_ALPHA',
'RGB',
'RGBA'
];
var isRenderable = {
'ALPHA': false,
'LUMINANCE': false,
'LUMINANCE_ALPHA': false,
'RGB': true,
'RGBA': true
};
var gl = null;
var wtu = WebGLTestUtils;
description();
var canvas = document.getElementById("canvas");
var canvasNoAlpha = document.getElementById("canvasNoAlpha");
var gl = wtu.create3DContext(canvas, {alpha:true});
var glNoAlpha = wtu.create3DContext(canvasNoAlpha, {alpha:false});
debug("test with an RGBA backbuffer");
var program = wtu.setupTexturedQuad(gl);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "During Initialization");
testFormats('RGBA');
testBackbufferFormats();
debug("test with an RGB backbuffer");
var gl = glNoAlpha;
var program = wtu.setupTexturedQuad(gl);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "During Initialization");
testFormats('RGB');
function testBackbufferFormats() {
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
for (var ii = 0; ii < formats.length; ++ii) {
var backFormat = formats[ii];
var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texImage2D(gl.TEXTURE_2D, 0, gl[backFormat], 2, 2, 0, gl[backFormat], gl.UNSIGNED_BYTE, null);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
var status = gl.checkFramebufferStatus(gl.FRAMEBUFFER);
debug('');
if (status == gl.FRAMEBUFFER_COMPLETE) {
if (!isRenderable[backFormat]) {
testFailed('Creating framebuffer from ' + backFormat + ' texture succeeded even though it is not a renderable format');
} else {
debug('test with ' + backFormat + ' fbo');
testFormats(backFormat);
}
} else {
debug(backFormat + ' not supported as a renderbuffer attachment');
}
}
}
function testFormats(backFormat) {
for (var ii = 0; ii < formats.length; ++ii) {
testCopyTexImage2D(backFormat, formats[ii]);
}
}
function toChannels(value) {
return ((value & 0x1000) ? 'R' : '_') +
((value & 0x0100) ? 'G' : '_') +
((value & 0x0010) ? 'B' : '_') +
((value & 0x0001) ? 'A' : '_');
}
function testCopyTexImage2D(backFormat, texFormat) {
var need = getChannelsFromFormat(texFormat);
var have = getChannelsFromFormat(backFormat);
var shouldPass = (need & have) == need;
//debug("need: " + toChannels(need));
//debug("have: " + toChannels(have));
//debug("both: " + toChannels(have & need));
// clear backbuffer
gl.clearColor(0.25, 1, 0.75, 0.5);
gl.clear(gl.COLOR_BUFFER_BIT);
var texture = gl.createTexture();
// Bind the texture to texture unit 0
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.copyTexImage2D(gl.TEXTURE_2D, 0, gl[texFormat], 0, 0, 2, 2, 0);
if (!shouldPass) {
wtu.glErrorShouldBe(
gl, gl.INVALID_OPERATION,
"should not be able to copyTexImage2D " + texFormat + " from " + backFormat);
return;
}
wtu.glErrorShouldBe(
gl, gl.NO_ERROR,
"should be able to copyTexImage2D " + texFormat + " from " + backFormat);
// Draw
wtu.clearAndDrawUnitQuad(gl);
var expectedColors = {
'ALPHA': [0, 0, 0, 127],
'LUMINANCE': [64, 64, 64, 255],
'LUMINANCE_ALPHA': [64, 64, 64, 127],
'RGB': [64, 255, 191, 255],
'RGBA': [64, 255, 191, 127]
};
var color = expectedColors[texFormat];
wtu.checkCanvas(gl, color, "should be " + color, 16);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
}
var successfullyParsed = true;
</script>
<script src="../../../js/js-test-post.js"></script>
</body>
</html>
|
