Vulkan Frame Streaming with Shader Processing

Goggles captures Vulkan application frames and streams them across processes using Linux DMA-BUF with DRM format modifiers, with support for RetroArch shader processing (CRT effects, scanlines, etc.).

Architecture

Target Application (Vulkan)
  └─ Capture Layer (vk_capture)
       └─ Export DMA-BUF via Unix Socket (SCM_RIGHTS)
            └─ Goggles Viewer
                 └─ RetroArch Shader Pipeline (Slang)
                      └─ Display / Stream

Key Features

• Zero-copy frame capture — DMA-BUF sharing avoids GPU-to-CPU readback
• Vulkan layer injection — hooks vkQueuePresentKHR transparently
• RetroArch shader support — apply CRT-Royale, zfast-crt, and other classic shaders
• Cross-process streaming — Unix domain sockets with SCM_RIGHTS for fd passing

Links

• GitHub Repository