skia2/site/user/sample/pdf.md

Using Skia's PDF Backend

Here is an example of using Skia's PDF backend in the recommended way: via the SkDocument and SkCanvas APIs.

#include "SkDocument.h"

bool WritePDF(SkWStream* outputStream) {
    SkDocument::PDFMetadata metadata;
    metadata.fCreator  = "creator....";
    metadata.fTitle    = "title...";
    metadata.fAuthor   = "author...";
    metadata.fSubject  = "subject...";
    metadata.fKeywords = "keywords...";
    metadata.fCreator  = "creator...";
    SkTime::DateTime now = get_current_date_and_time();
    metadata.fCreation.fEnabled = true;
    metadata.fCreation.fDateTime = now;
    metadata.fModified.fEnabled = true;
    metadata.fModified.fDateTime = now;
    sk_sp<SkDocument> pdfDocument(SkDocument::MakePDF(
            outputStream, SK_ScalarDefaultRasterDPI, metadata,
            nullptr, true);
    assert(pdfDocument);

    int numberOfPages = ....;
    for (int page = 0; page < numberOfPages; ++page) {
        SkScalar pageWidth = ....;
        SkScalar pageHeight = ....;
        SkCanvas* pageCanvas =
                pdfDocument->beginPage(pageWidth, pageHeight);

        // ....insert canvas draw commands here....

        pdfDocument->endPage();
    }
    return pdfDocument->close();
}