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https://github.com/daniel-lynch/ovrplugin-openxr-shim.git
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Daniel LynchandClaude Opus 4.8
a72a79ad29
An independent reimplementation of Meta's libOVRPlugin ABI on top of OpenXR, so VrApi-era Meta Quest VR titles can run on non-Meta OpenXR runtimes (Monado, Steam Frame) instead of being locked to Meta hardware. Original code only — no Meta/Epic/Capcom binaries, headers, or assets. Includes a desktop harness that drives the shim against Monado headless. Scope/legal: interoperability; entitlement handling is out of scope. See README for the legal/scope section and docs/ for the research trail and design notes. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01D6sFYGXZPsq3v7xtcDES6g
32 lines
1.5 KiB
C
32 lines
1.5 KiB
C
/* xrexts.c — list the OpenXR instance extensions the active runtime advertises.
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* Recon for the foveation bring-up: tells us which foveation / FDM / eye-tracking
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* extensions THIS runtime (Monado/Lepton) exposes, so we know what to wire into the
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* shim's apply_foveation() extension point. No Vulkan, no session — just enumerate.
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* cc xrexts.c -lopenxr_loader -o xrexts && XR_RUNTIME_JSON=.../openxr_monado.json ./xrexts */
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openxr/openxr.h>
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int main(void) {
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uint32_t n = 0;
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if (xrEnumerateInstanceExtensionProperties(NULL, 0, &n, NULL) != XR_SUCCESS || !n) {
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fprintf(stderr, "xrEnumerateInstanceExtensionProperties failed (runtime selected? service up?)\n");
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return 1;
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}
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XrExtensionProperties *p = calloc(n, sizeof *p);
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for (uint32_t i = 0; i < n; i++) p[i].type = XR_TYPE_EXTENSION_PROPERTIES;
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if (xrEnumerateInstanceExtensionProperties(NULL, n, &n, p) != XR_SUCCESS) return 1;
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printf("runtime advertises %u instance extensions:\n", n);
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for (uint32_t i = 0; i < n; i++) {
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const char *e = p[i].extensionName;
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int hot = strcasestr(e, "fov") || strcasestr(e, "foveat") || strcasestr(e, "density")
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|| strcasestr(e, "fdm") || strcasestr(e, "eye") || strcasestr(e, "gaze")
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|| strcasestr(e, "vrs") || strcasestr(e, "shading_rate") || strcasestr(e, "quad");
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printf(" %s %s (v%u)\n", hot ? "**" : " ", e, p[i].extensionVersion);
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}
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return 0;
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}
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