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feat(vk): load NVIDIA Streamline's interposer as the Vulkan loader on request

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vk_sl_prefer(1) before Vk.open() makes the Windows loader try sl.interposer.dll
beside the executable and fall back to vulkan-1.dll. Thunks for the sl* exports
and for calling feature functions from slGetFeatureFunction; macOS stubs.
Verified on an RTX 3070 Ti: slInit eOk, DLSS, DLSS-RR, Reflex and PCL supported,
DLSS-G reports no supported adapter (needs RTX 40).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-15 19:05:27 +03:00
parent fd750f3588
commit ad8f44b78a
3 changed files with 362 additions and 0 deletions
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24
runtime/native/vk.ludic
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@ -19,3 +19,27 @@
# ============================================================================
import "vk_api.ludic"
# Streamline (NVIDIA DLSS, Ray Reconstruction, Frame Generation, Reflex), Windows only: Vk.sl_prefer(1)
# before Vk.open() loads sl.interposer.dll as the Vulkan loader when it is beside the program, and
# Vk.sl_active() says whether it was. Each Vk.sl_* is the sl* export of the same name and returns
# its sl::Result (0 is eOk); -1 means there is no Streamline (macOS, or the DLL missing). The
# structs are plain memory, laid out as the SDK headers (include/sl_*.h, SDK 2.14.1) declare them.
extern function vk_sl_prefer(on: int) = "lvk_sl_prefer"
extern function vk_sl_active() -> int = "lvk_sl_active"
extern function vk_sl_init(pref: pointer, sdk_version: long) -> int = "lsl_slInit"
extern function vk_sl_shutdown() -> int = "lsl_slShutdown"
extern function vk_sl_is_feature_supported(feature: int, adapter_info: pointer) -> int = "lsl_slIsFeatureSupported"
extern function vk_sl_is_feature_loaded(feature: int, loaded: pointer) -> int = "lsl_slIsFeatureLoaded"
extern function vk_sl_get_feature_requirements(feature: int, requirements: pointer) -> int = "lsl_slGetFeatureRequirements"
extern function vk_sl_get_feature_function(feature: int, name: pointer, function_out: pointer) -> int = "lsl_slGetFeatureFunction"
extern function vk_sl_get_new_frame_token(token_out: pointer, frame_index: pointer) -> int = "lsl_slGetNewFrameToken"
extern function vk_sl_set_tag_for_frame(frame: pointer, viewport: pointer, tags: pointer, num_tags: int, cmd_buffer: pointer) -> int = "lsl_slSetTagForFrame"
extern function vk_sl_set_constants(constants: pointer, frame: pointer, viewport: pointer) -> int = "lsl_slSetConstants"
extern function vk_sl_evaluate_feature(feature: int, frame: pointer, inputs: pointer, num_inputs: int, cmd_buffer: pointer) -> int = "lsl_slEvaluateFeature"
extern function vk_sl_free_resources(feature: int, viewport: pointer) -> int = "lsl_slFreeResources"
# a feature function obtained with Vk.sl_get_feature_function, called with its arguments
extern function vk_sl_call_p(fn: pointer, a: pointer) -> int = "lsl_call_p"
extern function vk_sl_call_pp(fn: pointer, a: pointer, b: pointer) -> int = "lsl_call_pp"
extern function vk_sl_call_ppp(fn: pointer, a: pointer, b: pointer, c: pointer) -> int = "lsl_call_ppp"
extern function vk_sl_call_ip(fn: pointer, a: int, b: pointer) -> int = "lsl_call_ip"