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<!DOCTYPE HTML>
<html>
<head>
<meta charset='UTF-8'>
<script src='/tests/SimpleTest/SimpleTest.js'></script>
<link rel='stylesheet' href='/tests/SimpleTest/test.css'>
</head>
<body>
<script>
function shouldBe(testStr, refStr) {
ok(testStr == refStr, 'Expected "' + refStr + '", was "' + testStr + '".');
}
function getErrorStr(gl, err) {
if (!err) return "NO_ERROR";
for (const k in gl) {
const v = gl[k];
if (v == err) {
return k;
}
}
return `<${err}>`;
}
function glErrorShouldBe(gl, expected, opt_info) {
if (opt_info) {
opt_info = opt_info + ': '
} else {
opt_info = '';
}
if (!expected.length) {
expected = [expected];
}
expected = expected.map(x => getErrorStr(gl, x));
let was = gl.getError();
was = getErrorStr(gl, was);
console.log(expected);
ok(expected.includes(was),
`${opt_info}Expected gl.getError() in [${expected}], was ${was}.`);
}
(() => {
const gl = document.createElement('canvas').getContext('webgl2');
if (!gl) {
todo(false, 'No webgl2, skipping...');
return;
}
const pbo = gl.createBuffer();
gl.bindBuffer(gl.PIXEL_UNPACK_BUFFER, pbo);
const PBO_DATA = new Uint8Array([
255, 0, 0, 255,
0, 255, 0, 255,
]);
gl.bufferData(gl.PIXEL_UNPACK_BUFFER, PBO_DATA, gl.STATIC_DRAW);
const tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
const fb = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
const readback = new Uint8Array(4);
const PBO_LIST = [null, pbo];
for (const cur of PBO_LIST) {
gl.bindBuffer(gl.PIXEL_UNPACK_BUFFER, cur);
function tryUpload(arg, expectedReadback) {
let argType = typeof(arg);
if (arg === null) {
argType = 'null';
}
const argForPbo = (argType == 'number');
const pboBound = !!cur;
const expectedErr = (argForPbo == pboBound) ? 0 : gl.INVALID_OPERATION;
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA8, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE,
arg);
const with_without = pboBound ? 'with' : 'without';
glErrorShouldBe(gl, expectedErr, `${with_without} pbo, texImage(..., ${argType}("${arg}"))`);
if (expectedErr) return;
gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, readback);
shouldBe(expectedReadback.toString(), readback.toString());
}
const CPU_DATA = new Uint8Array([255, 255, 0, 255]);
tryUpload(null, [0,0,0,0]);
tryUpload(CPU_DATA, CPU_DATA);
tryUpload(0, PBO_DATA.slice(0,4));
tryUpload(4, PBO_DATA.slice(4));
}
})();
</script>
</body>
</html>