Kiyo

What is Kiyo?

A lightweight compute shader engine using ash.

Kiyo provides a simple configuration interface to run compute shaders. The following features are implemented:

• Multiple subsequent compute passes
• Shared storage images between them
• GLSL compile logging
• Shader hot-reloading

For any feedback or requests you are very welcome to create issues or contact me directly!

You can find examples in ./examples/ and in my toy project repository.

Shader environment variables

These variables are accessible in the shader and provided by Kiyo itself, do not overwrite these as bugs will be introduced.

• NUM_IMAGES - The amount of accessible storage images.
• WORKGROUP_SIZE - The workgroup size at which the shaders should run.

Building & running

Make sure you have the Vulkan SDK installed.
Then build and run kiyo:

git clone https://github.com/angelocarly/kiyo.git
cd kiyo
cargo run --example simple-render

GPU debugging

Windows & Linux

Renderdoc!

Mac

Mac only has XCode's Metal debugger. In order to use it you need to provide the following environment variables:

VULKAN_SDK=$HOME/VulkanSDK/<version>/macOS
DYLD_FALLBACK_LIBRARY_PATH=$VULKAN_SDK/lib
VK_ICD_FILENAMES=$VULKAN_SDK/share/vulkan/icd.d/MoltenVK_icd.json
VK_LAYER_PATH=$VULKAN_SDK/share/vulkan/explicit_layer.d

Then you should be able to launch your kiyo application and capture a frame.
This video does a nice job explaining the process.

References

• sound-shader - Cpal wrapper code and shader audio inspiration

Libraries

• cen - Window management and Vulkan wrappers
• ash - Vulkan bindings