Files
questshock/build-image/prepare-android-project.sh
ml d2dc58391b
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Add controller input and a laser-pointer-driven menu quad
- xr_input.c/h: an OpenXR action set (aim pose, trigger/select click, a
  menu-toggle button) plus ray/quad hit-testing, and a visible
  laser-pointer line drawn from the controller toward the hit point.
- xr_menu.c/h + MenuOverlay.java: a second composition-layer quad,
  toggled by a controller button, showing an off-screen, never-attached
  Android View tree (one "Keyboard" button so far) driven by synthetic
  touch events computed from the laser ray's hit UV.
- Migrate gl4es from a prebuilt binary baked into the Docker build-image
  to a vendored source snapshot (android/gl4es-src/) compiled from
  source at APK build time via CMake add_subdirectory(), patched through
  a new android/gl4es-patches/ (mirrors the existing engine-patches/
  pattern). This was needed to track down and fix a bug hit while
  building the menu: gl4es's fixed-pipeline emulation (fpe.c) was
  unconditionally substituting its own shader onto the menu's draw call
  (fpe_ReleventState() always sets alphafunc to a nonzero sentinel, so
  its fpe_IsEmpty() check could never see the state as empty), making
  the menu quad show the game's own rendering instead of its own
  content. Fixed by routing the menu's blit through a real
  glBlitFramebuffer() call instead of a shader-based draw, which gl4es's
  fpe.c has nothing to intercept - documented in README.md's new
  "Debugging notes" section.
- Renumber android/engine-patches/ to close the gap left by removing an
  unrelated diagnostic-only patch, and strip investigation-journal
  comments and dead diagnostic code (temporary tracing, env-var probes)
  left over from finding the bug above.
- Restructure README.md into numbered sections, document every
  engine/gl4es patch, add Android Studio dev/testing-cycle instructions,
  and generalize Quest-specific wording to any OpenXR headset. Update
  NOTICE.txt to match (gl4es is now vendored/patched source, not a
  prebuilt binary; add the OpenXR-SDK loader).
2026-08-02 06:27:49 +02:00

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#!/usr/bin/env bash
# Prepares android/ to be built: a scratch, patched copy of engine/ (see
# android/engine-patches/) and of android/gl4es-src/ (see
# android/gl4es-patches/) - neither vendored tree itself is ever modified -
# the Android SDL2/SDL2_mixer/fluidsynth-lite/openxr prebuilts staged into
# jniLibs, bundled assets, and android/engine.properties (engineDir/
# gl4esDir/prebuiltDir, read by android/app/build.gradle). gl4es itself is
# NOT prebuilt here - it's compiled from this scratch copy as a CMake
# subdirectory of the engine's own native build (see
# android/engine-patches/02-android-opengl-es.patch), so gl4es-patches/
# changes only need a normal rebuild, not a build-image rebuild. Always
# run inside this image (via ../run-image.sh, or directly if already
# inside it) - it reads from /opt/prebuilt/android/*, which only exists
# there.
#
# Two modes:
# (no args) - for build-apk.sh's own gradlew, invoked in this same
# container - engine.properties points at this
# container's own paths (e.g. /workspace/build/...).
# --host-paths - for building android/ natively in Android Studio on
# the HOST afterwards, instead of via build-apk.sh.
# Needs HOST_REPO_ROOT (set by run-image.sh) to know
# this container's bind-mounted repo root's path on
# the host, since a plain container-internal path
# like /workspace/... doesn't resolve there. Also
# exports /opt/prebuilt/android (host-invisible,
# image-only) to build/android-prebuilt so a host-side
# CMake configure can actually find it.
set -euo pipefail
HOST_PATHS=0
if [ "${1:-}" = "--host-paths" ]; then
HOST_PATHS=1
fi
REPO_ROOT="$(pwd)"
ANDROID_DIR="$REPO_ROOT/android"
SCRATCH_ENGINE="$REPO_ROOT/build/android-engine"
SCRATCH_GL4ES="$REPO_ROOT/build/android-gl4es"
PREBUILT_EXPORT_DIR="$REPO_ROOT/build/android-prebuilt"
echo "== Preparing a scratch, patched copy of engine/ =="
rm -rf "$SCRATCH_ENGINE"
mkdir -p "$(dirname "$SCRATCH_ENGINE")"
cp -a "$REPO_ROOT/engine" "$SCRATCH_ENGINE"
for p in "$ANDROID_DIR"/engine-patches/*.patch; do
patch -p1 -d "$SCRATCH_ENGINE" < "$p"
done
echo "== Preparing a scratch, patched copy of android/gl4es-src/ =="
rm -rf "$SCRATCH_GL4ES"
cp -a "$ANDROID_DIR/gl4es-src" "$SCRATCH_GL4ES"
for p in "$ANDROID_DIR"/gl4es-patches/*.patch; do
patch -p1 -d "$SCRATCH_GL4ES" < "$p"
done
echo "== Wiring up prebuilt Android SDL2_mixer/fluidsynth-lite (BUNDLED mode, like the desktop build) =="
mkdir -p "$SCRATCH_ENGINE/build_ext/built_sdl_mixer" "$SCRATCH_ENGINE/build_ext/fluidsynth-lite"
cp -a /opt/prebuilt/android/sdl2_mixer/. "$SCRATCH_ENGINE/build_ext/built_sdl_mixer/"
mkdir -p "$SCRATCH_ENGINE/build_ext/fluidsynth-lite/src"
cp -a /opt/prebuilt/android/fluidsynth-lite/lib/. "$SCRATCH_ENGINE/build_ext/fluidsynth-lite/src/"
cp -a /opt/prebuilt/android/fluidsynth-lite/include/. "$SCRATCH_ENGINE/build_ext/fluidsynth-lite/include/"
if [ "$HOST_PATHS" -eq 1 ]; then
: "${HOST_REPO_ROOT:?--host-paths needs HOST_REPO_ROOT set - run via ./run-image.sh, not directly}"
echo "== Exporting prebuilt Android SDL2/SDL2_mixer/fluidsynth-lite/openxr for host-side use =="
rm -rf "$PREBUILT_EXPORT_DIR"
cp -a /opt/prebuilt/android "$PREBUILT_EXPORT_DIR"
ENGINE_DIR_PROP="$HOST_REPO_ROOT/build/android-engine"
GL4ES_DIR_PROP="$HOST_REPO_ROOT/build/android-gl4es"
PREBUILT_DIR_PROP="$HOST_REPO_ROOT/build/android-prebuilt"
else
ENGINE_DIR_PROP="$SCRATCH_ENGINE"
GL4ES_DIR_PROP="$SCRATCH_GL4ES"
PREBUILT_DIR_PROP="/opt/prebuilt/android"
fi
{
echo "engineDir=$ENGINE_DIR_PROP"
echo "gl4esDir=$GL4ES_DIR_PROP"
echo "prebuiltDir=$PREBUILT_DIR_PROP"
} > "$ANDROID_DIR/engine.properties"
echo "== Staging bundled assets (shaders, soundfont, get-assets text) =="
ASSETS_DIR="$ANDROID_DIR/app/src/main/assets"
rm -rf "$ASSETS_DIR"
mkdir -p "$ASSETS_DIR/shaders" "$ASSETS_DIR/res"
# GLES ports of engine/shaders/ (see android/gles-shaders/ and
# android/engine-patches/04-android-opengl-es-render.patch) - not
# engine/shaders/ itself, which is desktop-only GLSL.
cp -a "$ANDROID_DIR/gles-shaders/." "$ASSETS_DIR/shaders/"
cp "/opt/prebuilt/soundfont/default.sf2" "$ASSETS_DIR/res/soundfont.sf2"
cp "$REPO_ROOT/res/assets/GET_ASSETS_QUEST.txt" "$ASSETS_DIR/GET_ASSETS_QUEST.txt"
echo "== Staging prebuilt Android SDL2/SDL2_mixer/fluidsynth-lite/openxr .so's into jniLibs =="
# gl4es is deliberately absent here - it's no longer prebuilt, it's compiled
# from $SCRATCH_GL4ES as part of the engine's own native build (see
# android/engine-patches/02-android-opengl-es.patch); AGP's own native-build
# packaging picks up its compiled libGL.so directly, without needing it
# staged into jniLibs by this script.
JNI_LIBS_DIR="$ANDROID_DIR/app/src/main/jniLibs/arm64-v8a"
rm -rf "$ANDROID_DIR/app/src/main/jniLibs"
mkdir -p "$JNI_LIBS_DIR"
find /opt/prebuilt/android/sdl2/lib /opt/prebuilt/android/sdl2_mixer/lib /opt/prebuilt/android/fluidsynth-lite/lib \
/opt/prebuilt/android/openxr/lib \
-name '*.so' -exec cp -a {} "$JNI_LIBS_DIR/" \;
echo "== Done =="
echo "engineDir=$ENGINE_DIR_PROP"
echo "gl4esDir=$GL4ES_DIR_PROP"
echo "prebuiltDir=$PREBUILT_DIR_PROP"
if [ "$HOST_PATHS" -eq 1 ]; then
echo "android/ is ready to open and build natively in Android Studio on the host."
fi