update buildscript and docs

CMakeLists.txt

@@ -53,4 +53,7 @@ target_compile_options(lsfg-vk PRIVATE
     -Wno-cast-function-type-strict
 )
 
-install(FILES "${CMAKE_BINARY_DIR}/liblsfg-vk.so" DESTINATION lib)
+install(FILES "${CMAKE_BINARY_DIR}/liblsfg-vk.so"
+    DESTINATION lib)
+install(FILES "${CMAKE_SOURCE_DIR}/VkLayer_LS_frame_generation.json"
+    DESTINATION share/vulkan/explicit_layer.d)

README.md

@@ -1,11 +1,13 @@
 # lsfg-vk
 This project brings [Lossless Scaling's Frame Generation](https://store.steampowered.com/app/993090/Lossless_Scaling/) to Linux!
-
-## How does it work?
-LSFG is primarily written in DirectX 11 compute shaders, which means we can use DXVK to translate it into SPIR-V. The surrounding parts have been rewritten in plain Vulkan code in order to make LSFG run natively on Linux.
-By specifying an `LD_PRELOAD`, lsfg-vk can place itself inbetween your game and Vulkan. That way it can fetch frames from the game and insert its own frames without any problems. (Beware of anticheats please!)
+>[!NOTE]
+> This is a work-in-progress. While frame generation has worked in a few games, there's still a long way to go. Please review the wiki for support (the wiki is not written yet)
 
 ## Building, Installing and Running
+
+>[!CAUTION]
+> The build instructions have recently changed. Please review them.
+
 In order to compile LSFG, make sure you have the following components installed on your system:
 - Traditional build tools (+ sed, git)
 - Clang compiler (this project does NOT compile easily with GCC)
@@ -18,25 +20,26 @@ Compiling lsfg-vk is relatively straight forward, as everything is neatly integr
 ```bash
 $ cmake -B build -G Ninja \
     -DCMAKE_BUILD_TYPE=Release \
-    -DCMAKE_INSTALL_PREFIX=$PWD/release \
+    -DCMAKE_INSTALL_PREFIX=~/.local \
     -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=ON \
     -DCMAKE_CXX_CLANG_TIDY=""
 $ cmake --build build
 $ cmake --install build
 ```
-(Make sure you change `$PWD/release` to the path you'd like to install this project to)
+This will install lsfg-vk to ~/.local/lib and ~/.local/share/vulkan.
 
 Next, you'll need to download Lossless Scaling from Steam. Switch to the `legacy_2.13` branch or download the corresponding depot.
 Copy or note down the path of "Lossless.dll" from the game files.
 
 Finally, let's actually start a program with frame generation enabled. I'm going to be using `vkcube` for this example:
 ```bash
-LD_PRELOAD="/home/pancake/.lsfg-vk/liblsfg-vk.so" LSFG_DLL_PATH="/home/pancake/games/Lossless Scaling/Lossless.dll" LSFG_MULTIPLIER=4 vkcube
+VK_INSTANCE_LAYERS="VK_LAYER_LS_frame_generation" LSFG_DLL_PATH="/home/pancake/games/Lossless Scaling/Lossless.dll" LSFG_MULTIPLIER=4 vkcube
 ```
 Make sure you adjust the paths. Let's examine each one:
-- `LD_PRELOAD`: This is how you let the loader know that you want to load lsfg-vk before anything else. This HAS to be either an ABSOLUTE path, or a path starting with `./` to make it relative. Specify `liblsfg-vk.so` here.
-- `LSFG_DLL_PATH`: Here you specify the Lossless.dll you downloaded from Steam. This is either an absolute path, or a relative path from where you are running the app.
+- `LVK_INSTANCE_LAYERS`: Specify `VK_LAYER_LS_frame_generation` here. This forces any Vulkan app to load the lsfg-vk layer.
+- `LSFG_DLL_PATH`: Here you specify the Lossless.dll you downloaded from Steam. lsfg-vk will extract and translate the shaders from here.
 - `LSFG_MULTIPLIER`: This is the multiplier you should be familiar with. Specify `2` for doubling the framerate, etc.
+- `VK_LAYER_PATH`: If you did not install to `~/.local` or `/usr`, you have to specify the `explicit_layer.d` folder here.
 
 >[!WARNING]
 > Unlike on Windows, LSFG_MULTIPLIER is heavily limited here (at the moment!). If your hardware can create 8 swapchain images, then setting LSFG_MULTIPLIER to 4 occupies 4 of those, leaving only 4 to the game. If the game requested 5 or more, it will crash.

VkLayer_LS_frame_generation.json

@@ -4,7 +4,7 @@
     "name": "VK_LAYER_LS_frame_generation",
     "type": "GLOBAL",
     "api_version": "1.4.313",
-    "library_path": "./build/liblsfg-vk.so",
+    "library_path": "../../../lib/liblsfg-vk.so",
     "implementation_version": "1",
     "description": "Lossless Scaling frame generation layer",
     "functions": {