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Download from Wow! eBook HLSL and Pixel Shaders for XAML Developers Walt Ritscher Beijing • Cambridge • Farnham • Köln • Sebastopol • Tokyo HLSL and Pixel Shaders for XAML Developers by Walt Ritscher Copyright © 2012 Walt Ritscher All rights reserved Printed in the United States of America Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472 O’Reilly books may be purchased for educational, business, or sales promotional use Online editions are also available for most titles (http://my.safaribooksonline.com) For more information, contact our corporate/institutional sales department: 800-998-9938 or corporate@oreilly.com Editor: Rachel Roumeliotis Production Editor: Rachel Steely Proofreader: Rachel Steely Cover Designer: Karen Montgomery Interior Designer: David Futato Illustrators: Robert Romano and Rebecca Demarest Revision History for the First Edition: 2012-07-03 First release See http://oreilly.com/catalog/errata.csp?isbn=9781449319847 for release details Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of O’Reilly Media, Inc HLSL and Pixel Shaders for XAML Developers, the image of an American bittern, and related trade dress are trademarks of O’Reilly Media, Inc Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks Where those designations appear in this book, and O’Reilly Media, Inc., was aware of a trademark claim, the designations have been printed in caps or initial caps While every precaution has been taken in the preparation of this book, the publisher and authors assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein ISBN: 978-1-449-31984-7 [LSI] 1341330024 Table of Contents Preface ix Foreword xv Shader 101 Why Should XAML Developers Learn HLSL? The Tale of the Shader HLSL and DirectX Understanding the Graphics Pipeline XAML and Shaders Summary Getting Started 11 Setting Up Your Development Computer Silverlight Development WPF Development Expression Blend Choosing a Shader Compiler DirectX Compiler WPF Build Task Shazzam Shader Editor Other Tools to Consider FX Composer NShader Visual Studio 2012 A First Shader Project Using Prebuilt Effects Adding Effects Debrief Custom Shader Create a Shader Algorithm 11 11 12 12 12 12 13 13 13 13 14 14 15 16 19 22 22 23 iii Compile the HLSL Code Add to Visual Studio XAML Project Create a NET Wrapper Class Compile the Project Instantiate the Shader Summary 24 24 25 26 27 28 Commonplace Pixel Shaders 29 A Word About Pseudocode Our Sample Image Color Modification Common Techniques Black, White, and Gray Color Replacement Color Enhancement and Correction Distinctive Effects Distortion and Displacement Magnify Embossed Testing Distortion Effects Other Displacement Effects Blurs Motion Blur Zoom Blur Sharpening Generative Effects Multiple Inputs Sampler Transition Texture Map Color Combination Photoshop Blend Modes Darken Modes Lighten Modes Contrast Modes Comparative Modes Other Modes Blend Modes in HLSL Practical Uses for Shader Effects Motion Blur in Moving Parts Blurs to Emphasize UI Focus Desaturate for Emphasis Summary iv | Table of Contents 30 30 30 31 32 34 34 36 37 38 39 40 42 42 43 43 43 43 44 44 46 47 49 49 51 52 52 52 53 53 54 54 55 55 How WPF and Silverlight Use Shaders 57 Framework Effects BlurEffect DropShadowEffect Nested Effects Multiple Effects on One Element Expression Blend Effects Using a Blend Effect Custom Effects Creating a Custom ShaderEffect Working with Samplers Multi-Input Shaders Understanding Sampler Size Creating Parameterized Effects Padding Effect Mapping Summary 57 58 59 59 59 60 61 63 63 65 72 73 75 77 78 83 Using Expression Blend and Visual Studio with Shaders 85 Creating a Project New Project Adding Assets Adding Effects Setting Effect Properties Visual Studio Editor Using Custom Effects in Blend Multi-Input Effects Transition Effects in Blend Create a State Group Add the States Set the Properties Adding a Transition Effect Summary 85 86 87 88 90 90 92 94 98 98 99 99 100 102 Using the Shazzam Shader Editor 103 UI Tour Create a Custom Shader Exploring the HLSL Code Editor Compiling and Testing the Shader Editor Status Bar Exploring the Generated Code Changing Options Working with HLSL Parameters 103 103 105 106 109 109 110 112 Table of Contents | v
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