Greg Pomerantz
ed52109dba
Root cause of scroll jank: first-present of each Image uploaded pixels
inside the render frame (~11-30 ms per 400px texture, 1.3 visible
hitches/s at 120 Hz; grey-image A/B: 20 -> 1). Slint has no render
thread and no pre-upload API.
Fix: decode worker creates the Rgba8Unorm texture on Slint's own wgpu
device (captured from GraphicsAPI::WGPU30 at RenderingSetup) and submits
the async upload; UI wraps it in Image::try_from(tex). Zero pixel work
in the render frame. CPU from_rgba8 fallback retained.
Measured (Pixel 9 Pro 120 Hz, 400 px, per-frame FR hook):
before: >10ms renders 20 in 15s (max 30 ms), 3 borderline 8-9 ms
after: 0 mid-scroll renders > 4.4 ms (median 1.9, p95 2.9);
only post-idle first-frames expensive (invisible)
Also: FR per-frame logging via set_rendering_notifier; APLY timestamp.
78 lines
3.5 KiB
Bash
Executable File
78 lines
3.5 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Build the gallery Android APK (and optionally install it).
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#
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# ./scripts/build.sh # release x86_64 (emulator) + install
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# ./scripts/build.sh aarch64 # release aarch64 (real device) + install
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# ./scripts/build.sh debug # debug x86_64 + install (faster builds)
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# ./scripts/build.sh <arch> no-install
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#
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# Desktop (Linux): cargo run (needs libfontconfig1 + pkg-config)
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# Desktop (macOS): cargo run (pure Rust, nothing extra)
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set -euo pipefail
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cd "$(dirname "$0")/.."
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export ANDROID_HOME=$HOME/android-sdk
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export ANDROID_NDK_ROOT=$HOME/android-sdk/ndk/27.0.12077973
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# ~/.local/bin: nasm (host build of libjpeg-turbo SIMD; aarch64 needs no nasm).
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export PATH="$HOME/.local/bin:$HOME/.cargo/bin:$ANDROID_HOME/platform-tools:$PATH"
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# turbojpeg (M2): build the vendored libjpeg-turbo with CMake, statically linked
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# into the app (no extra .so in the APK). The NDK CMake toolchain + ANDROID_*
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# vars are picked up by the `cmake` crate; verified 2026-10 (HANDOFF §10).
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if [ -n "$ANDROID_NDK_ROOT" ]; then
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export CMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_ROOT/build/cmake/android.toolchain.cmake
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export ANDROID_PLATFORM=android-26
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export ANDROID_STL=c++_static
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export TURBOJPEG_STATIC=1
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fi
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# SDK platform used to compile the Slint Java helper (target API, matches
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# target_sdk_version in Cargo.toml). Must be an installed platform dir.
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SDK_PLATFORM=android-35
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# Slint's android-activity build reads ANDROID_JAR first; setting it explicitly
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# lets us ALSO export ANDROID_PLATFORM=android-26 below (for the NDK CMake
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# toolchain's native API level) without the two tools fighting over that
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# variable (`android-build` would otherwise look up platforms/android-26).
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export ANDROID_JAR=$ANDROID_HOME/platforms/$SDK_PLATFORM/android.jar
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# C/C++ cross-compilers for bundled native deps (libsqlite3-sys via rusqlite).
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# The `cc` crate picks these up per target triple (min sdk 26).
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NDK_BIN=$ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/linux-x86_64/bin
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# CMake target ABI (x86_64 default; overridden below for aarch64).
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export ANDROID_ABI=x86_64
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export CC_x86_64_linux_android=$NDK_BIN/x86_64-linux-android26-clang
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export CXX_x86_64_linux_android=$NDK_BIN/x86_64-linux-android26-clang++
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export AR_x86_64_linux_android=$NDK_BIN/llvm-ar
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export CC_aarch64_linux_android=$NDK_BIN/aarch64-linux-android26-clang
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export CXX_aarch64_linux_android=$NDK_BIN/aarch64-linux-android26-clang++
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export AR_aarch64_linux_android=$NDK_BIN/llvm-ar
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# Debug-keystore signing is fine for personal use / Play internal testing.
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export CARGO_APK_RELEASE_KEYSTORE=$HOME/.android/debug.keystore
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export CARGO_APK_RELEASE_KEYSTORE_PASSWORD=android
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arg1=${1:-x86_64}
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arg2=${2:-install}
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profile=--release
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case $arg1 in
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debug) target=x86_64-linux-android; profile="" ;;
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debug-aarch64) target=aarch64-linux-android; profile=""; export ANDROID_ABI=arm64-v8a ;;
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x86_64) target=x86_64-linux-android ;;
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aarch64) target=aarch64-linux-android; export ANDROID_ABI=arm64-v8a ;;
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*) echo "unknown arch: $arg1" >&2; exit 1 ;;
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esac
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profile_dir=release; [ -z "$profile" ] && profile_dir=debug
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# Optional: ADB_SERIAL picks the device when several are attached (see AGENTS.md).
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adb=(); [ -n "${ADB_SERIAL:-}" ] && adb=(adb -s "$ADB_SERIAL")
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cargo apk2 build $profile --target "$target" --lib
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apk=target/$profile_dir/apk/gallery.apk
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echo "APK: $apk ($(du -h "$apk" | cut -f1))"
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if [ "$arg2" = install ] && command -v adb >/dev/null; then
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"${adb[@]}" install -r "$apk"
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"${adb[@]}" shell am start -n wow.gmp.gallery/android.app.NativeActivity || true
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fi
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