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Test Info:
/* Any copyright is dedicated to the Public Domain.
const RELATIVE_DIR = "toolkit/components/pdfjs/test/";
/**
* Get the number of red pixels in the canvas.
* @param {Object} browser
* @returns {Object}
*/
async function getRedPixels(browser) {
return SpecialPowers.spawn(browser, [], async function () {
const { document } = content;
const canvas = document.querySelector("canvas");
Assert.ok(!!canvas, "We must have a canvas");
const data = canvas
.getContext("2d")
.getImageData(0, 0, canvas.width, canvas.height).data;
let redPixels = 0;
let total = 0;
for (let i = 0, ii = data.length; i < ii; i += 4) {
const R = data[i];
const G = data[i + 1];
const B = data[i + 2];
if (R > 128 && R > 4 * G && R > 4 * B) {
redPixels += 1;
}
total += 1;
}
return [redPixels, total];
});
}
/**
* Test that the pdf has the correct color thanks to the SVG filters.
*/
add_task(async function test() {
let mimeService = Cc["@mozilla.org/mime;1"].getService(Ci.nsIMIMEService);
let handlerInfo = mimeService.getFromTypeAndExtension(
"application/pdf",
"pdf"
);
// Make sure pdf.js is the default handler.
is(
handlerInfo.alwaysAskBeforeHandling,
false,
"pdf handler defaults to always-ask is false"
);
is(
handlerInfo.preferredAction,
Ci.nsIHandlerInfo.handleInternally,
"pdf handler defaults to internal"
);
info("Pref action: " + handlerInfo.preferredAction);
await BrowserTestUtils.withNewTab(
{ gBrowser, url: "about:blank" },
async function (browser) {
// check that PDF is opened with internal viewer
await waitForPdfJSCanvas(
browser,
`${TESTROOT}file_pdfjs_transfer_map.pdf#zoom=100`
);
const [redPixels, total] = await getRedPixels(browser);
Assert.ok(
redPixels / total >= 0.1,
`Not enough red pixels: only ${redPixels} / ${total} red pixels!`
);
await waitForPdfJSClose(browser);
}
);
});