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Test Info:
const PDF_FILE =
getRootDirectory(gTestPath).replace(
) + "file_pdf.pdf";
add_task(async function canvas_placeholder_pdfjs() {
await SpecialPowers.pushPrefEnv({
set: [["privacy.resistFingerprinting", true]],
});
const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, PDF_FILE);
const data = await SpecialPowers.spawn(tab.linkedBrowser, [], async () => {
function extractCanvasData() {
const canvas = document.createElement("canvas");
canvas.width = 10;
canvas.height = 10;
const context = canvas.getContext("2d");
context.fillStyle = "#332211";
context.fillRect(0, 0, 10, 10);
// Add the canvas element to the document
document.body.appendChild(canvas);
return context.getImageData(0, 0, 10, 10).data;
}
return content.eval(`(${extractCanvasData})()`);
});
is(data.length, 10 * 10 * 4, "correct canvas data size");
let failure = false;
for (var i = 0; i < 10 * 10 * 4; i += 4) {
if (
data[i] != 0x33 ||
data[i + 1] != 0x22 ||
data[i + 2] != 0x11 ||
data[i + 3] != 0xff
) {
ok(false, `incorrect data ${data.slice(i, i + 4)} @ ${i}..${i + 3}`);
failure = true;
break;
}
}
ok(!failure, "canvas is correct");
BrowserTestUtils.removeTab(tab);
});