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Table of Contents<br />
1 Introduction.................................................................................................................................1<br />
1.1 Acknowledgments................................................................................................................2<br />
1.2 Changes................................................................................................................................2<br />
1.2.1 Summary of Changes from Version 4.10.....................................................................2<br />
1.3 Overview..............................................................................................................................4<br />
1.4 Error Handling......................................................................................................................5<br />
1.5 Typographical Conventions.................................................................................................5<br />
1.6 Deprecation..........................................................................................................................5<br />
2 Overview of OpenGL Shading....................................................................................................6<br />
2.1 Vertex Processor..................................................................................................................6<br />
2.2 Tessellation Control Processor.............................................................................................6<br />
2.3 Tessellation Evaluation Processor........................................................................................7<br />
2.4 Geometry Processor.............................................................................................................7<br />
2.5 Fragment Processor..............................................................................................................7<br />
3 Basics..........................................................................................................................................8<br />
3.1 Character Set........................................................................................................................8<br />
3.2 Source Strings......................................................................................................................8<br />
3.3 Preprocessor.........................................................................................................................9<br />
3.4 Comments..........................................................................................................................14<br />
3.5 Tokens................................................................................................................................15<br />
3.6 Keywords............................................................................................................................15<br />
3.7 Identifiers...........................................................................................................................17<br />
3.8 Definitions..........................................................................................................................17<br />
3.8.1 Static Use....................................................................................................................18<br />
3.8.2 Uniform and Non-Uniform Control Flow..................................................................18<br />
3.8.3 Dynamically Uniform Expressions.............................................................................18<br />
4 Variables and Types..................................................................................................................19<br />
4.1 Basic Types........................................................................................................................19<br />
4.1.1 Void............................................................................................................................23<br />
4.1.2 Booleans.....................................................................................................................23<br />
4.1.3 Integers.......................................................................................................................23<br />
4.1.4 Floats..........................................................................................................................25<br />
4.1.5 Vectors........................................................................................................................26<br />
4.1.6 Matrices......................................................................................................................26<br />
4.1.7 Opaque Types.............................................................................................................26<br />
4.1.7.1 Samplers.............................................................................................................27<br />
4.1.7.2 Images.................................................................................................................27<br />
4.1.7.3 Atomic Counters.................................................................................................27<br />
4.1.8 Structures....................................................................................................................27<br />
4.1.9 Arrays.........................................................................................................................28<br />
3
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