Rendering PDF content in Windows Store apps

Chetan ParulekarPrincipal Development Manager3-175

Introduction to the PDF APIsRendering PDF as imagesCustomizing your PDF renderingBest practicesRendering PDF to a DirectX surface

Agenda

Introduction to the PDF APIs

Introduction to the PDF APIs – a magazine app

Demo

OverviewImplementation derives from the ISO 32000-1 standards

Abstracts away all the format complexity from the developer

Focus is on rendering of PDF content as an image

APIs enable reading scenarios such as magazines

PDF APIs in Windows 8.1 Preview

Rendering PDF as images in your app

Rendering a PDF page in a Windows Store app

Demo

In summaryThe PDF APIs allow you to render individual pages of a PDF document into streams as images

The default rendering occurs with:• 100% page size• White as the page background color• PNG as the image encoding format

Rendering PDF as images in your app

Working with password-protected PDF files

Use the LoadFromFileAsync(file, password) or LoadFromStreamAsync(stream, password) APIs with the password string parameter

Rest of your code remains the same

Rendering PDF as images in your app

Customizing PDF rendering

Rendering PDF content at various zoom levels

Demo

In summaryUse PDFPageRenderingOptions along with the RenderToStreamAsync API

Customization options include:• Output resolution• High contrast• Page region to be rendered• Image encoding format• Background color

Customizing the rendering

Best practices when using PDF APIs

A sample app that demonstrates some best practices when using the PDF APIs

Demo

Best practicesUse techniques such as UI virtualization to render only pages in and around the view

Hold on to rendered pages if one needs to re-render them

Release pages that are no longer needed

Cancel page renderings that are superseded

Render only required portions of the page

Best practices when using PDF APIs

Rendering PDF to a DirectX surface

Rendering PDF content to a DirectX surface using SurfaceImageSource

Demo

ResourcesWindows 8.1 Preview SamplesWindows 8.1 Preview: New APIs and features for developers

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