goxpyriment

Test Stream Images

Demonstrates PresentStreamOfImages: a high-precision RSVP (Rapid Serial Visual Presentation) loop that presents PNG images frame-by-frame, VSYNC-locked, with sub-millisecond timing accuracy.

Timing logs are written to verify that actual onset and offset times match the requested durations.

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Prerequisites

• Go 1.25+
• SDL3 development libraries (sudo apt install libsdl3-dev on Ubuntu/Debian)
• PNG image files in the working directory (or embedded in the binary)

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Running

go run main.go

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Output

Data are saved to goxpy_data/ as a .xpd file (CSV with a metadata header):

Column	Description
image_index	Position in the stream
filename	Image filename
target_on_ms	Requested onset time (ms)
actual_onset_ms	Measured onset time (ms)
actual_offset_ms	Measured offset time (ms)

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Note

This is a technical test for timing verification. It is mainly useful for framework developers.

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