ByteScout PDF Suite – Javascript – Rotate image in pdf with pdf generator sdk for javascript

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ByteScout PDF Suite – Javascript – Rotate image in pdf with pdf generator sdk for javascript

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ByteScout-PDF-Suite-Javascript-Rotate-image-in-pdf-with-pdf-generator-sdk-for-javascript.pdf

How to rotate image in pdf with pdf generator sdk for javascript in Javascript and ByteScout PDF Suite

Continuous learning is a crucial part of computer science and this tutorial shows how to rotate image in pdf with pdf generator sdk for javascript in Javascript

The sample source code below will teach you how to rotate image in pdf with pdf generator sdk for javascript in Javascript. 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 be applied to rotate image in pdf with pdf generator sdk for javascript using Javascript.

The SDK samples given below describe how to quickly make your application do rotate image in pdf with pdf generator sdk for javascript in Javascript with the help of ByteScout PDF Suite. 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! Use of ByteScout PDF Suite in Javascript is also described in the documentation included along with the product.

ByteScout provides the free trial version of ByteScout PDF Suite along with the documentation and source code samples.

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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");

    pdf.pageAdd();

// we can use images only if we are on IE9 or higher (or non-IE browser)
 if (!IsInternetExplorer8OrLower)
 {
    // load image from local file
    pdf.imageLoadFromUrl('image1.jpg');
    // place this mage at given X, Y coordinates on the page and rotate -30 degree
    pdf.imagePlace(200, 40, -30);

    // load image from local file
    pdf.imageLoadFromUrl('image2.jpg');
    // placeimage at given X, Y coordinate and rotate 30 degree
    pdf.imagePlace(200, 420, 30);
}

    // return BytescoutPDF object instance
    return pdf;
}