Upsample Software

GPU and systems software consulting.

Graphics, GPU, C++ and application development.

Member of the Khronos Vulkan Working Group, representing Valve Co-author of four GPU programming books GDC & SIGGRAPH speaker

Graphics

Contributions to Valve projects, 2013 to present

Counter-Strike 2, Italy map

Counter-Strike 2

Contributed to rendering and performance optimization.

Half-Life: Alyx, City 17

Half-Life: Alyx

Contributed shader development, rendering work and performance optimization.

Dota 2 gameplay

Dota 2

Developed the OpenGL and later the Vulkan render backends for Linux and macOS. Dota 2 was used to bring up the first Vulkan drivers.

Dota Underlords key art

Dota Underlords

Developed the OpenGL ES and Vulkan render backends for Android and the iOS renderer for Valve's first Source 2 mobile game.

SteamVR

SteamVR

Added Vulkan and Direct3D 12 support on Windows. Helped bring SteamVR to Linux, including asynchronous reprojection.

Medical imaging and mobile

Patient positioning software

Mevion Medical Systems

Worked on the image registration application for patient positioning in the Monarch 250 proton therapy system, including integration with X-ray panels, cone beam CT and optical tracking.

Mobius Airo CT scanner

Mobius Imaging now Stryker

Developed the CT viewer and user interface for the hand pendant on the Airo CT scanner.

Cardiac mapping visualization

Rhythmia Medical now Boston Scientific

Developed shaders and OpenGL visualization code for a cardiac mapping application.

Qualcomm Snapdragon

Qualcomm

Ported Adreno SDK samples to Direct3D 11 and created OpenCL samples for Android.

Services

Performance

CPU and GPU profiling and optimization.

Shaders

Shader development and shader pipelines.

Slang · HLSL · GLSL · SPIR-V

Graphics APIs and ports

New platforms and APIs, or fixing existing ones.

Vulkan · Direct3D 12 · OpenGL

GPU compute

Moving compute workloads onto the GPU and making them fast.

CUDA · OpenCL · Vulkan compute

Applications and UI

Cross-platform desktop applications and user interfaces, including medical device software.

Qt · C++ · Windows · Linux · macOS

C++ and systems

Low-level software, architecture and code review.

C · C++ · Windows · Linux · macOS

GPU debugging

Postmortem debugging of GPU crashes, hangs and driver issues.

Background

  • Khronos. Valve's representative in the Vulkan Working Group. Helped bring up the first Vulkan drivers with Dota 2.
  • Shader pipelines. Works on the Source 2 shader pipeline, now built on Slang.
  • Speaking. GDC, SIGGRAPH and Steam Dev Days.
  • Books. OpenGL ES, OpenCL and OpenGL Shading Language programming guides (Addison-Wesley).

Contact

Upsample Software, LLC · Greater Boston area

dginsburg@upsamplesoftware.com