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<h1>Welcome to the AMD FidelityFX™ SDK 1.1.3</h1>

The FidelityFX SDK is a collection of heavily optimized, open source technologies (shader and runtime code) that can be used by developers to improve their DirectX® 12 or Vulkan® applications.

The FidelityFX SDK includes:

FidelityFX SDK Technique	Samples	GPUOpen page	Description
Combined Adaptive Compute Ambient Occlusion (CACAO) 1.4	CACAO sample	FidelityFX Ambient Occlusion	Uses intelligent and adaptive sampling techniques to produce excellent quality ambient occlusion at high performance.
Contrast Adaptive Sharpening (CAS) 1.2	CAS sample	FidelityFX Contrast Adaptive Sharpening	Implements a sharpening kernel that reclaims that high-frequency detail lost during rendering.
Denoiser 1.3	n/a	FidelityFX Denoiser	Provides a set of denoising compute shaders which remove artifacts from reflection and shadow rendering. Useful for both raytraced or rasterized content.
Classifier 1.3	n/a	n/a	Provides a set of tile classification compute shaders which prepare tile metadata to drive indirect workload generation. It's useful for guided and load-balanced ray tracing applications, letting you leverage ray tracing in an efficient manner.
Luminance Preserving Mapper 1.4	LPM sample	FidelityFX HDR Mapper	Offers a tone mapping and gamut mapping solution for HDR and wide gamut content.
Parallel Sort 1.3	Parallel Sort sample	FidelityFX Parallel Sort	Implements GPU-accelerated parallel sorting techniques. The sorts are stable useful for sorting particles or other GPU-side data sets.
Single Pass Downsampler 2.2	SPD sample	FidelityFX Downsampler	Allows you to downsample surfaces - and optionally generate a MIPmap chain - in a single compute dispatch.
Stochastic Screen-Space Reflections 1.5	SSSR sample	FidelityFX Screen Space Reflections	Provides high-fidelity screen-spaced reflections in your scene, without a hefty performance price tag.
Super Resolution (Spatial) 1.2	Super Resolution sample	FidelityFX Super Resolution	Offers a spatial single-frame solution for producing higher resolution frames from lower resolution inputs.
Super Resolution (Temporal) 2.3.2	Super Resolution sample	FidelityFX Super Resolution 2	Offers both spatial single-frame and temporal multi-frame solutions for producing high resolution frames from lower resolution inputs.
Super Resolution 3 3.1.3	Super Resolution sample	FidelityFX Super Resolution 3	Offers generation of interpolated frames in combination with our temporal multi-frame solution for producing high resolution frames from lower resolution inputs.
Super Resolution (Upscaler) 3.1.3	Super Resolution sample	FidelityFX Super Resolution 3	Offers temporal multi-frame solutions for producing high resolution frames from lower resolution inputs.
Frame Interpolation 1.1.2	Super Resolution sample	FidelityFX Super Resolution 3	Offers generation of interpolated frames from multiple real input frames, and multiple sources of motion vector data.
Frame Interpolation SwapChain 1.1.2	Super Resolution sample	FidelityFX Super Resolution 3	A replacement DXGI Swapchain implementation for DX12 which allows for additional frames to be presented along with real game frames, with relevant frame pacing.
Optical Flow 1.1.2	Super Resolution sample	FidelityFX Super Resolution 3	Offers a motion-estimation algorithm which is useful for generating block-based motion vectors from temporal image inputs.
Variable Shading 1.2	Variable Shading sample	FidelityFX Variable Shading	Helps you to drive Variable Rate Shading hardware introduced in RDNA2-based and contemporary GPUs, by analyzing the luminance of pixels in a tile to determine where the shading rate can be lowered to increase performance.
Blur 1.1	Blur sample	FidelityFX Blur	A library of highly optimized functions which perform common blurring operations such as Gaussian blur, radial blurs, and others.
Depth-of-Field 1.1	DoF sample	FidelityFX Depth of Field	Implements a high-quality DOF filter complete with bokeh.
Lens 1.1	Lens sample	FidelityFX Lens	Implements a library of optimized lens effects including chromatic aberration, film grain, and vignetting.
Classifier (Shadows) 1.3 Denoiser (Shadows) 1.2	Hybrid Shadows sample 1.1	FidelityFX Hybrid Shadows	An implementation of an example shadowing technique which shows you how you could combine rasterized shadow maps and hardware ray tracing to deliver high quality soft shadows at a reasonable performance cost.
Classifier (Reflections) 1.3 Denoiser (Reflections) 1.2	Hybrid Reflections sample 1.1	FidelityFX Hybrid Reflections	An implementation of an an example reflections technique which shows you how you could mix FidelityFX SSSR with ray traced reflections, delivering higher quality reflections than SSSR alone at reasonable performance cost.
Breadcrumbs library 1.0	Breadcrumbs sample	FidelityFX Breadcrumbs Library	Library aiding with post-mortem GPU crash analysis.
Brixelizer 1.0	Brixelizer GI sample	FidelityFX Brixelizer GI	A compute-based, highly-optimized sparse distance fields technique.
Brixelizer GI 1.0	Brixelizer GI sample	FidelityFX Brixelizer GI	A compute-based, highly-optimized global illumination technique, built with Brixelizer.

<h2>Further information</h2>

<h2>Known issues</h2>

AMD FidelityFX SDK Sample	API / Configuration	Problem Description
FidelityFX CAS / FidelityFX SSSR	DX12 / Release configuration	When unchecking vsync option and losing window focus, some flickering can be observed on some GPUs.
FidelityFX CACAO	VK / Release configuration	"Unable to create swapchain" message can occur on select GPU manufacturers.
FidelityFX FSR API	VK / Release configuration	UI flickering/disappearing may occur on some Intel Arc GPUs. Occasional hangs may also occur (change and regain Window focus to continue)
FidelityFX Lens	Vulkan / All configurations	Enabling FP16 version on select Arc GPUs will cause device loss.
FidelityFX LPM	Vulkan / All configurations	When rapidly pressing alt-enter to go to full screen mode and back, the HDR display handle can occasionally become lost leading to a dim screen until another full screen toggle is applied again.
FidelityFX Hybrid Shadows / FidelityFX FSR	Vulkan / All configurations	Due to resource view handling in the native Vulkan backend, the ability to change the number of cascades on a directional light in Vulkan samples has been disabled to prevent sample instability.
FidelityFX DOF	All APIs / All Configs	Some artifacts may occur on some Intel Arc GPUs.
All FidelityFX SDK Samples	All APIs / All Configs	There is a resource leak in the UploadContext used to load glTF content.
All FidelityFX SDK Samples	All APIs / All Configs	Windows path length restrictions may cause compile issues. It is recommended to place the SDK close to the root of a drive or use subst or a mklink to shorten the path.
All FidelityFX SDK Samples	All APIs / All Configs	There is a build error when using CMake 3.31 or newer

<h2>Open source</h2>

AMD FidelityFX SDK is open source, and available under the MIT license.

For more information on the license terms please refer to license.

<h2>Disclaimer</h2>

The information contained herein is for informational purposes only, and is subject to change without notice. While every precaution has been taken in the preparation of this document, it may contain technical inaccuracies, omissions and typographical errors, and AMD is under no obligation to update or otherwise correct this information. Advanced Micro Devices, Inc. makes no representations or warranties with respect to the accuracy or completeness of the contents of this document, and assumes no liability of any kind, including the implied warranties of noninfringement, merchantability or fitness for particular purposes, with respect to the operation or use of AMD hardware, software or other products described herein. No license, including implied or arising by estoppel, to any intellectual property rights is granted by this document. Terms and limitations applicable to the purchase or use of AMD’s products are as set forth in a signed agreement between the parties or in AMD's Standard Terms and Conditions or use of AMD’s products are as set forth in a signed agreement between the parties or in AMD's Standard Terms and Conditions of Sale.

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