Add skeleton code of fgviewer

CMakeLists.txt

@@ -525,11 +525,14 @@ else()
     option(FILAMENT_BUILD_FILAMAT "Build filamat and JNI buildings" OFF)
 endif()
 
-# By default, link in matdbg for Desktop + Debug only since it pulls in filamat and a web server.
+# By default, link in matdbg/fgviewer for Desktop + Debug only since it pulls in filamat and a web server.
 if (CMAKE_BUILD_TYPE STREQUAL "Debug" AND IS_HOST_PLATFORM)
     option(FILAMENT_ENABLE_MATDBG "Enable the material debugger" ON)
+    # TODO: Uncomment below when fgviewer is ready
+    # option(FILAMENT_ENABLE_FGVIEWER "Enable the frame graph viewer" ON)
 else()
     option(FILAMENT_ENABLE_MATDBG "Enable the material debugger" OFF)
+    option(FILAMENT_ENABLE_FGVIEWER "Enable the frame graph viewer" OFF)
 endif()
 
 # Only optimize materials in Release mode (so error message lines match the source code)
@@ -778,6 +781,11 @@ if (FILAMENT_BUILD_FILAMAT OR IS_HOST_PLATFORM)
     if (FILAMENT_ENABLE_MATDBG OR IS_HOST_PLATFORM)
         add_subdirectory(${LIBRARIES}/matdbg)
     endif()
+
+    # TODO: Uncomment below when fgviewer is ready
+    # if (FILAMENT_ENABLE_FGVIEWER OR IS_HOST_PLATFORM)
+    #     add_subdirectory(${LIBRARIES}/fgviewer)
+    # endif()
 endif()
 
 if (FILAMENT_SUPPORTS_VULKAN)

android/build.gradle

@@ -11,6 +11,9 @@
 // com.google.android.filament.exclude-vulkan
 //     When set, support for Vulkan will be excluded.
 //
+// com.google.android.filament.fgviewer
+//     When set, enables fgviewer
+//
 // com.google.android.filament.matdbg
 //     When set, enables matdbg
 //
@@ -61,6 +64,11 @@ buildscript {
             .gradleProperty("com.google.android.filament.exclude-vulkan")
             .isPresent()
 
+    // TODO: Uncomment below when fgviewer is ready
+    // def fgviewer = providers
+    //         .gradleProperty("com.google.android.filament.fgviewer")
+    //         .isPresent()
+
     def matdbg = providers
             .gradleProperty("com.google.android.filament.matdbg")
             .isPresent()
@@ -115,6 +123,8 @@ buildscript {
         "-DANDROID_STL=c++_static",
         "-DFILAMENT_DIST_DIR=${filamentPath}".toString(),
         "-DFILAMENT_SUPPORTS_VULKAN=${excludeVulkan ? 'OFF' : 'ON'}".toString(),
+        // TODO: Uncomment below when fgviewer is ready
+        // "-DFILAMENT_ENABLE_FGVIEWER=${fgviewer ? 'ON' : 'OFF'}".toString(),
         "-DFILAMENT_ENABLE_MATDBG=${matdbg ? 'ON' : 'OFF'}".toString(),
         "-DFILAMENT_DISABLE_MATOPT=${matnopt ? 'ON' : 'OFF'}".toString()
     ]

android/filament-android/CMakeLists.txt

@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION 3.19)
 project(filament-android)
 
 option(FILAMENT_SUPPORTS_VULKAN "Enables Vulkan on Android" OFF)
+# TODO: Uncomment below when fgviewer is ready
+# option(FILAMENT_ENABLE_FGVIEWER "Enables Frame Graph Viewer" OFF)
 option(FILAMENT_ENABLE_MATDBG "Enables Material debugger" OFF)
 option(FILAMENT_DISABLE_MATOPT "Disables material optimizations" OFF)
 
@@ -51,6 +53,13 @@ add_library(smol-v STATIC IMPORTED)
 set_target_properties(smol-v PROPERTIES IMPORTED_LOCATION
         ${FILAMENT_DIR}/lib/${ANDROID_ABI}/libsmol-v.a)
 
+# TODO: Uncomment below when fgviewer is ready
+# if (FILAMENT_ENABLE_FGVIEWER)
+#     add_library(fgviewer STATIC IMPORTED)
+#     set_target_properties(fgviewer PROPERTIES IMPORTED_LOCATION
+#             ${FILAMENT_DIR}/lib/${ANDROID_ABI}/libfgviewer.a)
+# endif()
+
 if (FILAMENT_ENABLE_MATDBG)
     add_library(matdbg STATIC IMPORTED)
     set_target_properties(matdbg PROPERTIES IMPORTED_LOCATION
@@ -117,6 +126,8 @@ target_link_libraries(filament-jni
     # libgeometry is PUBLIC because gltfio uses it.
     PUBLIC geometry
 
+    # TODO: Uncomment below when fgviewer is ready
+    # $<$<STREQUAL:${FILAMENT_ENABLE_FGVIEWER},ON>:fgviewer>
     $<$<STREQUAL:${FILAMENT_ENABLE_MATDBG},ON>:matdbg>
     $<$<STREQUAL:${FILAMENT_ENABLE_MATDBG},ON>:filamat>
     $<$<STREQUAL:${FILAMENT_SUPPORTS_VULKAN},ON>:bluevk>

build.sh

@@ -172,6 +172,7 @@ VULKAN_ANDROID_GRADLE_OPTION=""
 EGL_ON_LINUX_OPTION="-DFILAMENT_SUPPORTS_EGL_ON_LINUX=OFF"
 
 MATDBG_OPTION="-DFILAMENT_ENABLE_MATDBG=OFF"
+FGVIEWER_OPTION="-DFILAMENT_ENABLE_FGVIEWER=OFF"
 MATDBG_GRADLE_OPTION=""
 
 MATOPT_OPTION=""
@@ -240,6 +241,7 @@ function build_desktop_target {
             -DCMAKE_BUILD_TYPE="$1" \
             -DCMAKE_INSTALL_PREFIX="../${lc_target}/filament" \
             ${EGL_ON_LINUX_OPTION} \
+            ${FGVIEWER_OPTION} \
             ${MATDBG_OPTION} \
             ${MATOPT_OPTION} \
             ${ASAN_UBSAN_OPTION} \
@@ -376,6 +378,7 @@ function build_android_target {
             -DFILAMENT_NDK_VERSION="${FILAMENT_NDK_VERSION}" \
             -DCMAKE_INSTALL_PREFIX="../android-${lc_target}/filament" \
             -DCMAKE_TOOLCHAIN_FILE="../../build/toolchain-${arch}-linux-android.cmake" \
+            ${FGVIEWER_OPTION} \
             ${MATDBG_OPTION} \
             ${MATOPT_OPTION} \
             ${VULKAN_ANDROID_OPTION} \
@@ -613,6 +616,7 @@ function build_ios_target {
             -DPLATFORM_NAME="${platform}" \
             -DIOS=1 \
             -DCMAKE_TOOLCHAIN_FILE=../../third_party/clang/iOS.cmake \
+            ${FGVIEWER_OPTION} \
             ${MATDBG_OPTION} \
             ${MATOPT_OPTION} \
             ${STEREOSCOPIC_OPTION} \
@@ -820,6 +824,8 @@ while getopts ":hacCfgijmp:q:uvslwedk:bx:S:X:" opt; do
             ;;
         d)
             PRINT_MATDBG_HELP=true
+            # TODO: Uncomment below when fgviewer is ready
+            # FGVIEWER_OPTION="-DFILAMENT_ENABLE_FGVIEWER=ON"
             MATDBG_OPTION="-DFILAMENT_ENABLE_MATDBG=ON, -DFILAMENT_BUILD_FILAMAT=ON"
             MATDBG_GRADLE_OPTION="-Pcom.google.android.filament.matdbg"
             ;;

filament/CMakeLists.txt

@@ -561,6 +561,13 @@ target_link_libraries(${TARGET} PUBLIC filaflat)
 target_link_libraries(${TARGET} PUBLIC filabridge)
 target_link_libraries(${TARGET} PUBLIC ibl-lite)
 
+if (FILAMENT_ENABLE_FGVIEWER)
+    target_link_libraries(${TARGET} PUBLIC fgviewer)
+    add_definitions(-DFILAMENT_ENABLE_FGVIEWER=1)
+else()
+    add_definitions(-DFILAMENT_ENABLE_FGVIEWER=0)
+endif()
+
 if (FILAMENT_ENABLE_MATDBG)
     target_link_libraries(${TARGET} PUBLIC matdbg)
     add_definitions(-DFILAMENT_ENABLE_MATDBG=1)

libs/fgviewer/CMakeLists.txt

@@ -0,0 +1,71 @@
+cmake_minimum_required(VERSION 3.19)
+project(fgviewer C ASM)
+
+set(TARGET fgviewer)
+set(PUBLIC_HDR_DIR include)
+
+if (CMAKE_CROSSCOMPILING)
+    include(${IMPORT_EXECUTABLES})
+endif()
+
+# ==================================================================================================
+# Sources and headers
+# ==================================================================================================
+
+set(PUBLIC_HDRS
+    include/fgviewer/DebugServer.h
+    include/fgviewer/JsonWriter.h
+)
+
+set(SRCS
+    src/ApiHandler.cpp
+    src/ApiHandler.h
+    src/DebugServer.cpp
+)
+
+# ==================================================================================================
+# Include and target definitions
+# ==================================================================================================
+
+include_directories(${PUBLIC_HDR_DIR})
+
+add_library(${TARGET} STATIC ${PUBLIC_HDRS} ${SRCS})
+
+target_link_libraries(${TARGET} PUBLIC
+        civetweb
+        utils
+)
+
+target_include_directories(${TARGET} PRIVATE ${filamat_SOURCE_DIR}/src)
+
+target_include_directories(${TARGET} PUBLIC ${PUBLIC_HDR_DIR})
+set_target_properties(${TARGET} PROPERTIES FOLDER Libs)
+
+# ==================================================================================================
+# Compiler flags
+# ==================================================================================================
+
+if (MSVC)
+else()
+    target_compile_options(${TARGET} PRIVATE -Wno-deprecated-register)
+endif()
+
+# ==================================================================================================
+# Installation
+# ==================================================================================================
+
+# matdbg has dependencies on non-installed libraries. Here we bundle them all together into a single
+# library that gets copied into the installation folder so users are only required to link against
+# matdbg.
+set(FGVIEWER_DEPS
+    fgviewer
+    civetweb
+    )
+
+set(FGVIEWER_COMBINED_OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/libfgviewer_combined.a")
+combine_static_libs(fgviewer "${FGVIEWER_COMBINED_OUTPUT}" "${FGVIEWER_DEPS}")
+
+set(FGVIEWER_LIB_NAME ${CMAKE_STATIC_LIBRARY_PREFIX}fgviewer${CMAKE_STATIC_LIBRARY_SUFFIX})
+install(FILES "${FGVIEWER_COMBINED_OUTPUT}" DESTINATION lib/${DIST_DIR} RENAME ${FGVIEWER_LIB_NAME})
+# We do not need fgviewer headers in the install directory
+# install(DIRECTORY ${PUBLIC_HDR_DIR}/fgviewer DESTINATION include)

libs/fgviewer/include/fgviewer/DebugServer.h

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+#ifndef FGVIEWER_DEBUGSERVER_H
+#define FGVIEWER_DEBUGSERVER_H
+
+#include <utils/CString.h>
+
+#include <tsl/robin_map.h>
+#include <utils/Mutex.h>
+
+class CivetServer;
+
+namespace filament::fgviewer {
+
+using FrameGraphInfoKey = uint32_t;
+
+struct FrameGraphPassInfo {
+    utils::CString pass_name;
+    // TODO: Add struct detail properties
+};
+
+struct FrameGraphInfo {
+    utils::CString view_name;
+    std::vector<FrameGraphPassInfo> passes;
+};
+
+/**
+ * Server-side frame graph debugger.
+ *
+ * This class manages an HTTP server. It receives frame graph packages from the Filament C++ engine or
+ * from a standalone tool such as fginfo.
+ */
+class DebugServer {
+public:
+    static std::string_view const kSuccessHeader;
+    static std::string_view const kErrorHeader;
+
+    DebugServer(int port);
+    ~DebugServer();
+
+    /**
+     * Notifies the debugger that a new view has been added.
+     */
+    void addView(const utils::CString& name, FrameGraphInfo info);
+
+    /**
+     * Notifies the debugger that the given view has been deleted.
+     */
+    void removeView(const utils::CString& name);
+
+    /**
+     * Updates the information for a given view.
+     */
+    void updateView(const utils::CString& name, FrameGraphInfo info);
+
+    bool isReady() const { return mServer; }
+
+private:
+    static FrameGraphInfoKey getKeybyString(const utils::CString &input,
+                                            uint32_t seed);
+
+    CivetServer* mServer;
+
+    tsl::robin_map<FrameGraphInfoKey, FrameGraphInfo> mViews;
+    mutable utils::Mutex mViewsMutex;
+
+    class FileRequestHandler* mFileHandler = nullptr;
+    class ApiHandler* mApiHandler = nullptr;
+
+    friend class FileRequestHandler;
+    friend class ApiHandler;
+};
+
+} // namespace filament::fgviewer
+
+#endif  // FGVIEWER_DEBUGSERVER_H

libs/fgviewer/include/fgviewer/JsonWriter.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+#ifndef FGVIEWER_JSONWRITER_H
+#define FGVIEWER_JSONWRITER_H
+
+#include <utils/CString.h>
+
+namespace filament {
+namespace fgviewer {
+
+struct FrameGraphInfo;
+
+// This class generates portions of JSON messages that are sent to the web client.
+// Note that some portions of these JSON strings are generated by directly in DebugServer,
+// as well as CommonWriter.
+class JsonWriter {
+public:
+
+    // Retrieves the most recently generated string.
+    const char* getJsonString() const;
+    size_t getJsonSize() const;
+
+    // Generates a JSON string describing the given FrameGraphInfo.
+    bool writeFrameGraphInfo(const FrameGraphInfo& frameGraph);
+
+private:
+    utils::CString mJsonString;
+};
+
+} // namespace fgviewer
+} // namespace filament
+
+#endif  // FGVIEWER_JSONWRITER_H