Engine: native presets K and M in the D3D12 shim, wider game coverage

A standalone Vulkan inference engine (engine/) for DLSS presets K and M that
runs from weights extracted from the user's own nvngx_dlss.dll, with d4r's
own input, network and reconstruction shaders or the native HIP network
layers, recorded into the game's command list by the shim. Opt-in
([Engine] Enabled / D4R_ENGINE=1); anything uncovered falls back to the
CUDA/ZLUDA path with the reason logged.

Byte-identical to NGX's CUDA backend under the phase-capable reference
(1706x960 -> 2560x1440, native HIP network, eleven frames, RX 9070 XT):
- K render- and display-resolution motion vectors, HDR and LDR
- K game-supplied exposure and automatic exposure with any pre-exposure
  and exposure scale (one residual: effective exposure exactly 2 or 4)
- K and M with the DLSS indicator's inverted-axis parameters
- M with any exposure settings (NGX ignores them for M)
K packages need the current compile_k.py (marker D4RO0003).

Also: HIP shared buffers are pooled across feature recreation (ROCm leaks
destroyed imports), hipnet.bin must match the preset, M-only games do not
load the K model, install_d4r_runtime.sh stages k, k-ldr, m, m-ldr with
hip/, the activation table has a generator (gen_activation_m.py), and
package_release.sh can bundle the engine's shaders (never its weights).

Signed-off-by: woutermans <[email protected]>

engine/build.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+OUT="${1:-$ROOT/build/native-engine}"
+CXX="${CXX:-g++}"
+mkdir -p "$OUT"
+# The native HIP network (hip_net.h) is shared by both runners when ROCm is installed; without it they fall back
+# to the engine's own Vulkan network. The library itself never links HIP.
+ROCM="${D4R_ROCM_DIR:-/opt/rocm}"
+HIP=()
+if [[ -f "$ROCM/include/hip/hip_runtime_api.h" ]]; then
+    HIP=(-DD4R_ENGINE_HIP "$ROOT/engine/hip_net.cpp" -I"$ROCM/include" -L"$ROCM/lib" -lamdhip64 "-Wl,-rpath,$ROCM/lib")
+fi
+"$CXX" -std=c++17 -O3 -Wall -Wextra -Wno-missing-field-initializers -fPIC -shared \
+    "$ROOT/engine/runtime.cpp" "$ROOT/engine/game.cpp" "$ROOT/engine/game_m.cpp" -lvulkan -o "$OUT/libd4r_engine.so"
+"$CXX" -std=c++17 -O3 -Wall -Wextra -Wno-missing-field-initializers \
+    "$ROOT/engine/replay.cpp" "${HIP[@]}" -L"$OUT" -ld4r_engine -lvulkan '-Wl,-rpath,$ORIGIN' -o "$OUT/d4r-k"
+"$CXX" -std=c++17 -O3 -Wall -Wextra -Wno-missing-field-initializers \
+    "$ROOT/engine/replay_m.cpp" "${HIP[@]}" -L"$OUT" -ld4r_engine -lvulkan '-Wl,-rpath,$ORIGIN' -o "$OUT/d4r-m"
+printf 'Built %s and %s\n' "$OUT/d4r-k" "$OUT/d4r-m"