ShadowFX

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DirectX 11 and 12 library that provides a scalable and GCN-optimized solution for deferred shadow filtering

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# AMD ShadowFX

![AMD ShadowFX](http://gpuopen-effects.github.io/media/effects/shadowfx_thumbnail.png)

The ShadowFX library provides a scalable and GCN-optimized solution for deferred shadow filtering. Currently the library supports uniform and contact hardening shadow (CHS) kernels.

Version 2.0 of the library now supports both DirectX&reg; 11 and DirectX&reg; 12. The ShadowFX API is unified across D3D11 and D3D12, allowing an easy transition to D3D12. Samples are provided for both D3D11 and D3D12 versions.

The library supports a range of different options:
* Shadow map packing into an atlas or a texture array
* Processing up to 6 shadow maps for a union of lights, cascaded light, or a cube light
* Poisson-distributed and regular sampling patterns

The ShadowFX library can also serve as a sandbox for experiments with other shadow filtering techniques.

### Prerequisites for DirectX 11
* AMD Radeon&trade; GCN-based GPU (HD 7000 series or newer)
  * Or other DirectX&reg; 11 compatible discrete GPU with Shader Model 5 support 
* 64-bit Windows&reg; 7 (SP1 with the [Platform Update](https://msdn.microsoft.com/en-us/library/windows/desktop/jj863687.aspx)), Windows&reg; 8.1, or Windows&reg; 10
* Visual Studio&reg; 2015 or Visual Studio&reg; 2017

### Prerequisites for DirectX 12
* AMD Radeon&trade; GCN-based GPU (HD 7000 series or newer)
  * Or other DirectX&reg; 12 compatible discrete GPU with Shader Model 5 support 
* 64-bit Windows&reg; 10
* Visual Studio&reg; 2015 or Visual Studio&reg; 2017

### Getting started
* For DirectX 11, Visual Studio solutions for VS2015 and VS2017 can be found in the `amd_shadowfx11_sample\build` directory.
* For DirectX 12, Visual Studio solutions for VS2015 and VS2017 can be found in the `amd_shadowfx12_sample\build` directory.
* There are also solutions for just the core library in the `amd_shadowfx\build` directory.
* Documentation is located in the `amd_shadowfx\doc` directory.

### Learn More
* [Related blog posts on GPUOpen](http://gpuopen.com/tag/shadowfx/)

### Premake
The Visual Studio solutions and projects in this repo were generated with Premake. If you need to regenerate the Visual Studio files, double-click on `gpuopen_geometryfx_update_vs_files.bat` in the `premake` directory.

For Visual Studio 2015 and 2017, this version of Premake adds the `WindowsTargetPlatformVersion` element to the project file to specify which version of the Windows SDK will be used. To change `WindowsTargetPlatformVersion` for Visual Studio 2015 and 2017, change the value for `_AMD_WIN_SDK_VERSION` in `premake\amd_premake_util.lua` and regenerate the Visual Studio files.

### Third-Party Software
* DXUT is distributed under the terms of the MIT License. See `framework\d3d11\dxut\MIT.txt`.
* Premake is distributed under the terms of the BSD License. See `premake\LICENSE.txt`.
* The Open Asset Import Library (assimp) is distributed under the terms of the BSD License. See `third_party\assimp\LICENSE`.

DXUT and Assimp are only used by the samples, not the core library. Only first-party software (specifically `amd_shadowfx` and `amd_lib`) is needed to build the ShadowFX library.

### Attribution
* AMD, the AMD Arrow logo, Radeon, Crossfire, and combinations thereof are either registered trademarks or trademarks of Advanced Micro Devices, Inc. in the United States and/or other countries.
* Microsoft, DirectX, Visual Studio, and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

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