addpkg(main/termux-wsi-layer): 0.0.1

packages/termux-wsi-layer/10_termux.json

@@ -0,0 +1,6 @@
+{
+    "file_format_version": "1.0.0",
+    "ICD": {
+        "library_path": "termux-wsi-layer.so"
+    }
+}

packages/termux-wsi-layer/CMakeLists.txt

@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 3.29)
+project(termux-wsi-layer C)
+
+set(CMAKE_BUILD_TYPE Debug)
+set(CMAKE_C_STANDARD 11)
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(X11 REQUIRED x11 x11-xcb xcb xcb-randr xcb-dri3 xcb-present)
+
+add_library(termux-wsi-layer SHARED egl.c window.c sync.c)
+set_target_properties(termux-wsi-layer PROPERTIES PREFIX "")
+target_include_directories(termux-wsi-layer PRIVATE include)
+target_compile_options(termux-wsi-layer PRIVATE ${X11_CFLAGS})
+target_link_options(termux-wsi-layer PRIVATE -Wl,--no-as-needed -landroid -Wl,--as-needed -ggdb ${X11_LDFLAGS})
+
+add_executable(test test.c)
+target_link_options(test PRIVATE -lEGL -lGLESv2 -lX11 -lm)
+
+install(TARGETS termux-wsi-layer LIBRARY DESTINATION lib ARCHIVE DESTINATION lib)
+install(FILES 10_termux.json DESTINATION ${CMAKE_INSTALL_PREFIX}/share/glvnd/egl_vendor.d)
+add_custom_target(uninstall)
+add_custom_command(TARGET uninstall POST_BUILD COMMAND rm ARGS -v -f
+    ${CMAKE_INSTALL_PREFIX}/share/glvnd/egl_vendor.d/10_termux.json
+    ${CMAKE_INSTALL_PREFIX}/lib/termux-wsi-layer.so
+)

packages/termux-wsi-layer/build.sh

@@ -0,0 +1,15 @@
+TERMUX_PKG_HOMEPAGE=https://termux.dev
+TERMUX_PKG_DESCRIPTION="Termux's ICD/WSI wrapper for using with proprietary Android drivers"
+TERMUX_PKG_LICENSE="GPL-3.0"
+TERMUX_PKG_MAINTAINER="@termux"
+TERMUX_PKG_VERSION="0.0.1"
+TERMUX_PKG_SKIP_SRC_EXTRACT=true
+TERMUX_PKG_BUILD_DEPENDS="libglvnd, libxcb, libx11"
+TERMUX_PKG_NO_STRIP=true
+
+TERMUX_PKG_SRCDIR="$TERMUX_PREFIX/opt/termux-wsi-layer/src"
+
+termux_step_pre_configure() {
+	mkdir -p "$TERMUX_PREFIX/opt/termux-wsi-layer/src"
+	cp -r "${TERMUX_PKG_BUILDER_DIR}/"{include,*.c,*.h,*.json,CMakeLists.txt} "$TERMUX_PREFIX/opt/termux-wsi-layer/src"
+}

packages/termux-wsi-layer/common.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2024 Twaik Yont <[email protected]>
+ *
+ * Licensed under the GNU GENERAL PUBLIC LICENSE, Version 3 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.gnu.org/licenses/gpl-3.0.en.html
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#pragma once
+
+// Workaround for `error: 'AHardwareBuffer_describe' is unavailable: introduced in Android 26`
+// We will explicitly mark these symbols as weak to avoid using `ANDROID_UNAVAILABLE_SYMBOLS_ARE_WEAK`
+// These symbols will equal to NULL in the case if they were not linked and we can check this in __eglMain
+#define AHardwareBuffer_allocate _AHardwareBuffer_allocate
+#define AHardwareBuffer_release _AHardwareBuffer_release
+#define AHardwareBuffer_describe _AHardwareBuffer_describe
+#define AHardwareBuffer_sendHandleToUnixSocket _AHardwareBuffer_sendHandleToUnixSocket
+#include <android/hardware_buffer.h>
+#undef AHardwareBuffer_allocate
+#undef AHardwareBuffer_release
+#undef AHardwareBuffer_describe
+#undef AHardwareBuffer_sendHandleToUnixSocket
+
+#define WEAK __attribute__((weak))
+int AHardwareBuffer_allocate(const AHardwareBuffer_Desc* _Nonnull desc, AHardwareBuffer* _Nullable* _Nonnull outBuffer) WEAK;
+void AHardwareBuffer_release(AHardwareBuffer* _Nonnull buffer) WEAK;
+void AHardwareBuffer_describe(const AHardwareBuffer* _Nonnull buffer, AHardwareBuffer_Desc* _Nonnull outDesc) WEAK;
+int AHardwareBuffer_sendHandleToUnixSocket(const AHardwareBuffer* _Nonnull buffer, int socketFd) WEAK;
+
+// We can not link to these functions directly for two reasons
+// 1. This API is not exposed to NDK.
+// 2. The `libui.so` is explicitly blocklisted for linking.
+// So our solution is to declare these symbols as weak and let linker override them.
+// We use GraphicBuffer_getNativeBuffer only as fallback in the case if AHardwareBuffer_to_ANativeWindowBuffer is unavailable.
+// Both AHardwareBuffer_to_ANativeWindowBuffer and GraphicBuffer_getNativeBuffer are aliases to make code easier to read.
+
+#define AHardwareBuffer_to_ANativeWindowBuffer _ZN7android38AHardwareBuffer_to_ANativeWindowBufferEP15AHardwareBuffer
+#define GraphicBuffer_getNativeBuffer _ZNK7android13GraphicBuffer15getNativeBufferEv
+size_t AHardwareBuffer_to_ANativeWindowBuffer(void* _Nullable) WEAK;
+size_t GraphicBuffer_getNativeBuffer(void* _Nullable) WEAK;