VkGHL

Vulkan (Game Halt, Green Hog, ... whatever)? Layer.
Force anisotropy, mip LOD Bias, VSYNC and limit frame rate for Vulkan-driven games.

Settings (environment variables)

• FPS - limit frame time (>0)
• AF - Anisotropy (0 - Off, 1..16 - On)
• MIPLODBIAS - Mip Map LOD Bias (-16..16 (aka sharpen..blurry, -1 is ok in general))
  Consider to disable AA/AF when setting this.
• RETRO - "retro" filter (0 - Off, 1 - On)
• VSYNC
  0 - Off
  1 - Mailbox (uncapped framerate)
  2 - On
  3 - Adaptive

Build

Prepare

1. git clone https://github.com/LunarG/VulkanTools
2. cd VulkanTools
3. [optional] for d in assistant_layer demo_layer starter_layer; do rm -r layer_factory/$d; done
4. git submodule add -- https://github.com/pchome/VkGHL layer_factory/VkGHL

Build

1. mkdir -p build_layer
2. cd build_layer
3. NOTE: full path to Vulkan header files (may fix "vk_loader_platform.h" compile-time errors)

cmake \
-DCMAKE_CXX_FLAGS="-I/usr/include/vulkan" \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_INSTALL_PREFIX=/tmp/VkGHL \
-DBUILD_TESTS=OFF \
-DBUILD_LAYERSVT=OFF \
-DBUILD_VKTRACE=OFF \
-DBUILD_VIA=OFF \
-DBUILD_LAYERMGR=OFF \
-DBUILD_VKTRACE_REPLAY=OFF \
-DVULKAN_HEADERS_INSTALL_DIR=usr/ \
-DVULKAN_LOADER_INSTALL_DIR=usr/ \
-DVULKAN_VALIDATIONLAYERS_INSTALL_DIR=usr/ \
..

4. make
5. Repeat steps 1..4 for 32bit build
   (e.g. use build_layer32 name and -DCMAKE_CXX_FLAGS="-m32 -I/usr/include/vulkan")

Try

cd layers

MIPLODBIAS=-1 \
AF=16 \
RETRO=1 \
VSYNC=0 \
FPS=150.55 \
DXVK_HUD=1 \
VK_LAYER_PATH=. \
VK_INSTANCE_LAYERS="VK_LAYER_LUNARG_VkGHL" \
wine d3d11-triangle.exe

Suitable installation path examples

In such cases you can ommit VK_LAYER_PATH= environment variable. Install *.so files into directory visible via LD_LIBRARY_PATH=.

System

/usr/lib/libVkLayer_VkGHL.so
/usr/lib64/libVkLayer_VkGHL.so
/usr/share/vulkan/explicit_layer.d/VkLayer_VkGHL.json

User (add LD_LIBRARY_PATH="${HOME}/.local/lib64:${HOME}/.local/lib" to your env)

~/.local/lib/libVkLayer_VkGHL.so
~/.local/lib64/libVkLayer_VkGHL.so
~/.local/share/vulkan/explicit_layer.d/VkLayer_VkGHL.json

Useful tools

vkconfig

The Vulkan Configurator is a graphical application that allows a user to specify which layers will be loaded by Vulkan applications at runtime. It provides an alternative to setting layers through environment variables or an application's layer selection. In addition, it allows using layers from non-standard locations, selecting the ordering for implicit layers, and specifying settings for layers that Vulkan Configurator supports.

Note

Currently mimics libstrangle behaviour and env vars (UPPERCASE ones). This may change in future.