Metal Shading Language Specification
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- 2 Data Types 11 ................................................................................................
- Page of 2 174
- 3 Operators 46 .................................................................................................
- 4 Function and Variable Declarations 52 ............................................................
- Page of 3 174
| Metal Shading Language Specification Version 2.0 Developer 1 Introduction 8 ............................................................................................... 1.1 Audience 8 ............................................................................................................................ 1.2 Organization of this Specification 8 ...................................................................................... 1.3 References 8 ......................................................................................................................... 1.4 Metal and C++14 9 ............................................................................................................... 1.4.1 Overloading 9 .................................................................................................................. 1.4.2 Templates 9 ..................................................................................................................... 1.4.3 Preprocessing Directives 9 ............................................................................................. 1.4.4 Restrictions 9 .................................................................................................................. 1.5 Metal Pixel Coordinate System 10 ......................................................................................... 2 Data Types 11 ................................................................................................ 2.1 Scalar Data Types 11 ............................................................................................................. 2.2 Vector Data Types 12 ............................................................................................................ 2.2.1 Accessing Vector Components 14 .................................................................................. 2.2.2 Vector Constructors 16 ................................................................................................... 2.2.3 Packed Vector Types 18 .................................................................................................. 2.3 Matrix Data Types 19 ............................................................................................................. 2.3.1 Accessing Matrix Components 20 .................................................................................. 2.3.2 Matrix Constructors 21 .................................................................................................... 2.4 Alignment of Data Types 22 .................................................................................................. 2.5 Atomic Data Types 22 ........................................................................................................... 2.6 Pixel Data Types 23 ............................................................................................................... 2.7 Buffers 24 ............................................................................................................................. 2.8 Textures 25 ........................................................................................................................... 2.9 Samplers 27 .......................................................................................................................... 2.10 Imageblocks 30 ..................................................................................................................... 2.10.1 Imageblocks in Fragment Functions 32 ......................................................................... 2.10.1.1 Implicit Imageblock Layout for Fragment Functions 32 ................................................. 2.10.1.2 Explicit Imageblock Layout for Fragment Functions 32 ................................................. 2.10.2 Imageblocks in Kernel Functions 34 .............................................................................. 2.11 Aggregate Types 35 ............................................................................................................. 2.11.1 Arrays of Textures and Samplers 35 ............................................................................... 2.11.1.1 Element Access 36 ......................................................................................................... 2017-9-12 | Copyright © 2017 Apple Inc. All Rights Reserved. Page of 2 174 2.11.1.2 Capacity 36 ..................................................................................................................... 2.11.1.3 Constructors for Templated Arrays 37 ............................................................................ 2.12 Argument Buffers 38 ............................................................................................................. 2.12.1 Tier 2 Hardware Support for Argument Buffers 40 ......................................................... 2.13 Uniform Type 41 .................................................................................................................... 2.13.1 The Need for a Uniform Type 41 ..................................................................................... 2.13.2 Behavior of the Uniform Type 43 .................................................................................... 2.13.3 Uniform Control Flow 44 ....................................................................................................... 2.14 Type Conversions and Re-interpreting Data 44 .................................................................... 2.15 Implicit Type Conversions 45 ................................................................................................ 3 Operators 46 ................................................................................................. 3.1 Scalar and Vector Operators 46 ............................................................................................ 3.2 Matrix Operators 49 .............................................................................................................. 4 Function and Variable Declarations 52 ............................................................ 4.1 Function Specifiers 52 .......................................................................................................... 4.1.1 Post-Tessellation Vertex Functions 52 ............................................................................ 4.1.1.1 Patch Type and Number of Control Points Per-Patch 53 ................................................ 4.1.2 Tile Functions 53 ............................................................................................................. 4.1.3 Fragment Function Specifier 54 ...................................................................................... 4.2 Address Space Attributes for Variables and Arguments 54 .................................................. 4.2.1 device Address Space 55 ............................................................................................... 4.2.2 threadgroup Address Space 56 ...................................................................................... 4.2.2.1 SIMD-groups and Quad-groups 56 ............................................................................... 4.2.3 threadgroup_imageblock Address Space 57 ................................................................. 4.2.4 constant Address Space 57 ............................................................................................ 4.2.5 thread Address Space 58 ................................................................................................ 4.3 Function Arguments and Variables 58 .................................................................................. 4.3.1 Attributes to Locate Buffers, Textures and Samplers 59 ................................................ 4.3.1.1 Vertex Function Example with Resources and Outputs to Device Memory 61 ............... 4.3.1.2 Raster Order Groups 62 .................................................................................................. 4.3.2 Struct of Buffers and Textures 63 .................................................................................. 4.3.3 Attributes to Locate Per-Vertex Inputs 64 ...................................................................... 4.3.4 Attributes for Built-in Variables 67 .................................................................................. 2017-9-12 | Copyright © 2017 Apple Inc. 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