Joshua Ashton - Frog Blog

Joshua Ashton

Ribbit. 🐸

Bringing Vulkan Raytracing to older AMD hardware (Vega and below)

Bringing Vulkan Raytracing to older AMD hardware (Vega and below)

As soon as Bas Nieuwenhuizen [https://www.basnieuwenhuizen.nl/] mentioned that he was working on support for Vulkan Raytracing in RADV, my curiosity as to whether this feature could be brought to older generations of AMD hardware was peaked. Yesteryesterday and yesterday I decided to implement some of the missing

Phantom Bugs in Places You Won't Expect

Phantom Bugs in Places You Won't Expect

Recently, I've been dealing with problems when running the latest Mesa [https://gitlab.freedesktop.org/mesa/mesa] from git (the open Linux userspace graphics driver stack). I was getting random crashes on startup in some games unless I enabled logging in DXVK. I spent hours trying to find the problem

D3D12 APITrace - Capture and Replay

D3D12 APITrace - Capture and Replay

The past week, I have been working on an APITrace implementation for Direct3D 12, primarily for use for developing VKD3D-Proton [https://github.com/HansKristian-Work/vkd3d-proton] (a D3D12->Vulkan translation layer.) Joshua-Ashton/apitraceTools for tracing OpenGL, Direct3D, and other graphics APIs - Joshua-Ashton/apitraceGitHubJoshua-Ashton [https://github.com/Joshua-Ashton/apitrace/tree/d3d12]

Get into Source Programming - Getting and Building Enhanced Source (Part 1)

Get into Source Programming - Getting and Building Enhanced Source (Part 1)

What is this guide? This tutorial series will cover how to get started with Enhanced Source, making your first entity (a cute little froggie!) as well as the basics on how to use Git effectively. Enhanced Source is a modified version of the Alien Swarm SDK containing a large amounts

An (unofficial) Vulkan Depth Bias Extension

An (unofficial) Vulkan Depth Bias Extension

Why? D3D9 (Floating Point Depth Bias) D3D9 requires us to use floating point depth bias values -- this is an issue as Vulkan uses lowest representable value for the value (which is format based), however, we can't just multiply our way out of this problem, as this wouldn't work as