Output Intents

const doc = new PdfDocument();
const page = doc.newPage();

const lines = [
    "This document contains the following output intents (first one is the default):",
];

let i = 0;
for (const profile of profiles) {
    const iccData = await Util.loadFile(`common/${profile.fileName}`);
    const iccProfile = IccProfile.create(iccData);
    const oi = OutputIntent.createDefaultForPdfA();
    oi.outputCondition = `Output intent testing ${i++}`;
    oi.registryName = "http://www.color.org";
    oi.outputConditionIdentifier = profile.fileName;
    oi.destOutputProfile = iccProfile;
    doc.outputIntents.add(oi);

    lines.push(`\u2022\u2003${profile.fileName}, source: ${profile.url}`);
}

lines.push(
    "Colors processed via the ICC Probe Profile are deliberately distorted, " +
    "so that it is easy to visually confirm that a profile is being used. " +
    "To see the effect in this PDF, you may open it in Adobe Acrobat Reader DC and make sure that " +
    "Edit | Preferences | Page Display | Show Overprint Preview is set to 'Always', " +
    "then the deliberate color distortion will be obvious."
);

const rc = addNote(lines.join("\n"), page);
// Load the image
const imageData = await Util.loadFile("images/roofs.png");
const image = Image.load(imageData);
// Draw the image below the note
page.context.drawImage(
    image,
    rc.x,
    rc.y + rc.height + 24,
    rc.width,
    rc.width,
    { keepAspectRatio: true }
);
const pdfData = await doc.savePdf();
Util.saveFile("OutputIntents.pdf", pdfData);


// Helper function addNote
function addNote(text, page) {
    const g = page.context;
    const resolution = g.resolution; // default 72 pts/inch
    const pad = resolution / 8;      // 1/8 inch padding
    const margin = resolution;       // 1 inch margin

    const boundsX = margin;
    const boundsY = margin;
    const boundsW = g.width - margin * 2;
    const boundsH = g.height - margin * 2;

    const helvetica = Font.getPdfFont(StandardPdfFont.Helvetica);
    const tl = new Layout({
        defaultFormat: new Format({ font: helvetica, fontSize: 12 }),
        maxWidth: boundsW,
        maxHeight: boundsH,
        marginLeft: pad,
        marginRight: pad,
        marginTop: pad,
        marginBottom: pad,
    });
    tl.append({ text });
    tl.performLayout();

    const rectX = boundsX;
    const rectY = boundsY;
    const rectW = tl.contentWidth + pad * 2;
    const rectH = tl.contentHeight + pad * 2;

    g.drawRect(rectX, rectY, rectW, rectH, {
        fillColor: "rgb(213,221,240)",
        lineColor: "rgb(59,92,170)",
        lineWidth: 0.5,
    });
    g.drawLayout(tl, boundsX, boundsY);

    return { x: rectX, y: rectY, width: rectW, height: rectH };
}