The "portable" aspect typically refers to a "drop-in" implementation where the DLL can be placed directly in the game's executable directory (often in a folder like bin/x64 ) to enable or upgrade upscaling without a system-wide installation.

FidelityFX-FSR2/src/ffx-fsr2-api/ffx_fsr2_interface.h at master

(Note: exact function names vary by implementation; follow header shipped with the DLL.)

The file is a critical 64-bit component of AMD’s FidelityFX™ Super Resolution 2 (FSR 2) technology, specifically designed for applications using the Vulkan (VK) API . This Dynamic Link Library (DLL) acts as a bridge between game engines and modern graphics hardware, enabling advanced temporal upscaling to improve frame rates without sacrificing visual quality. Core Purpose and Functionality

HMODULE h = LoadLibraryA("ffx_fsr2_vk_x64.dll"); auto Initialize = (PFN_Initialize)GetProcAddress(h, "ffxFsr2Initialize"); // call Initialize with VkDevice handle and params...