ByteScout PDF Suite – Javascript – Add image to pdf from canvas with pdf generator sdk for javascript

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ByteScout PDF Suite – Javascript – Add image to pdf from canvas with pdf generator sdk for javascript

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ByteScout-PDF-Suite-Javascript-Add-image-to-pdf-from-canvas-with-pdf-generator-sdk-for-javascript.pdf

How to add image to pdf from canvas with pdf generator sdk for javascript in Javascript with ByteScout PDF Suite

Learn to add image to pdf from canvas with pdf generator sdk for javascript in Javascript

These source code samples are assembled by their programming language and functions they apply. ByteScout PDF Suite is the bundle that provides six different SDK libraries to work with PDF from generating rich PDF reports to extracting data from PDF documents and converting them to HTML. This bundle includes PDF (Generator) SDK, PDF Renderer SDK, PDF Extractor SDK, PDF to HTML SDK, PDF Viewer SDK and PDF Generator SDK for Javascript. It can add image to pdf from canvas with pdf generator sdk for javascript in Javascript.

This prolific sample source code in Javascript for ByteScout PDF Suite contains various functions and other necessary options you should do calling the API to add image to pdf from canvas with pdf generator sdk for javascript. This Javascript sample code is all you need for your app. Just copy and paste the code, add references (if needs to) and you are all set! If you want to use these Javascript sample examples in one or many applications then they can be used easily.

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checkdatauri.js

      	// checks if we have datauri support in current browser
        // if we have support for datauri support then we can stream generated PDF right into the browser
        // otherwise we should use Downloadify script to allow user to save PDF file
	function CheckDataURISupport(){

	var result = true;
	var checkDataURISupportImage = new Image();

	checkDataURISupportImage.onload = checkDataURISupportImage.onerror = function(){
		if(this.width != 1 || this.height != 1){
			result = false;
		}
	}
	checkDataURISupportImage.src = "data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=";
	// check if we have datauri support in current browser - end

		return result;
	}

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createpdf.js

      // function that creates BytescoutPDF instance (defined in BytescoutPDF.js script which have to be included into the same page)
// then calls API methods and properties to create PDF document
// and returns created BytescoutPDF object instance
// this CreatePDF() function is called from Sample.html
// IsInternetExplorer8OrLower parameter indicates if we use IE8 or lower so we CAN'T use images (as it requires HTML5 Canvas available in IE9 or higher). Other browsers should be working fine

// IMPORTANT ABOUT IMAGES: 
// When using Firefox or IE, pdf generation may fail because images are not accessible when pdf generation works
// the solution for this issue is to preload images in main HTML document before running PDF generation
// to preload images, put them into hidden div block "pdfreportimages" - you can see it in the sample.html right after <body> opening tag


function CreatePDF(IsInternetExplorer8OrLower) {

    // create BytescoutPDF object instance
    var pdf = new BytescoutPDF();

    // set document properties: Title, subject, keywords, author name and creator name
    pdf.propertiesSet("Sample document title", "Sample subject", "keyword1, keyword 2, keyword3", "Document Author Name", "Document Creator Name");

    // set page size
    pdf.pageSetSize(BytescoutPDF.A4);

    // set page orientation (BytescoutPDF.PORTRAIT = portrait, BytescoutPDF.LANDSCAPE = landscape)
    pdf.pageSetOrientation(BytescoutPDF.PORTRAIT);

    // add new page
    pdf.pageAdd();

if (!IsInternetExplorer8OrLower) // images and drawings from canvas are supported on IE version 9 and higher, other modern browsers should work fine
{
    // create temporary canvas (you can also simply get existing canvas)
    var canvas = document.createElement('canvas');
    // set width and height
    canvas.width = 320;
    canvas.height = 240;

    // get context from canvas (to draw on)
    var context = canvas.getContext("2d");

    // set white background color
    context.fillStyle = "#EEEEEE";
    // and fill the background with white color
    context.fillRect(0, 0, 320, 240);

    // draw the yellow circle
    context.strokeStyle = "#000000";
    context.fillStyle = "#FFFF00";
    context.beginPath();
    context.arc(100, 100, 50, 0, Math.PI * 2, true);
    context.closePath();
    context.stroke();
    context.fill();

    // load image from canvas into BytescoutPDF
    pdf.imageLoadFromCanvas(canvas);

    // place this mage at given X, Y coordinates on the page
    pdf.imagePlace(20, 40);

    // place this mage at given coordinates and dimesionson on the page
    pdf.imagePlaceSetSize(20, 170, 0, 80, 60);
}

    // return BytescoutPDF object instance
    return pdf;
}