* Adjustment: Initial CMake reworking.

Engine/lib/assimp/port/AndroidJNI/AndroidJNIIOSystem.cpp

@@ -0,0 +1,210 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2021, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file Android extension of DefaultIOSystem using the standard C file functions */
+
+
+#include <assimp/config.h>
+#include <android/api-level.h>
+#if __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+
+#include <libgen.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <android/log.h>
+#include <android/asset_manager.h>
+#include <android/asset_manager_jni.h>
+#include <android/native_activity.h>
+#include <assimp/ai_assert.h>
+#include <assimp/port/AndroidJNI/AndroidJNIIOSystem.h>
+#include <assimp/DefaultIOStream.h>
+#include <fstream>
+
+using namespace Assimp;
+
+// ------------------------------------------------------------------------------------------------
+// Constructor.
+AndroidJNIIOSystem::AndroidJNIIOSystem(ANativeActivity* activity)
+{
+	AndroidActivityInit(activity);
+}
+
+AndroidJNIIOSystem::AndroidJNIIOSystem(const char *internalPath, AAssetManager* assetManager) :
+        mApkWorkspacePath(internalPath),
+        mApkAssetManager(assetManager) {
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor.
+AndroidJNIIOSystem::~AndroidJNIIOSystem() {
+    // nothing to do here
+}
+
+// ------------------------------------------------------------------------------------------------
+// Tests for the existence of a file at the given path.
+bool AndroidJNIIOSystem::Exists( const char* pFile) const {
+    AAsset* asset = AAssetManager_open(mApkAssetManager, pFile, AASSET_MODE_UNKNOWN);
+    FILE* file = ::fopen( (mApkWorkspacePath + getOsSeparator() + std::string(pFile)).c_str(), "rb");
+	
+    if (!asset && !file) {
+        __android_log_print(ANDROID_LOG_ERROR, "Assimp", "Asset manager can not find: %s", pFile);
+        return false;
+    }
+
+    __android_log_print(ANDROID_LOG_ERROR, "Assimp", "Asset exists");
+    if (file) {
+        ::fclose( file);
+    }
+    
+    return true;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Inits Android extractor
+void AndroidJNIIOSystem::AndroidActivityInit(ANativeActivity* activity) {
+    if (activity == nullptr) {
+        return;
+    }
+    mApkWorkspacePath = activity->internalDataPath;
+    mApkAssetManager = activity->assetManager;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Create the directory for the extracted resource
+static int mkpath(std::string path, mode_t mode) {
+    if (mkdir(path.c_str(), mode) == -1) {
+        switch(errno) {
+            case ENOENT:
+                if (mkpath(path.substr(0, path.find_last_of('/')), mode) == -1)
+                    return -1;
+                else
+                    return mkdir(path.c_str(), mode);
+            case EEXIST:
+                return 0;
+            default:
+                return -1;
+        }
+    }
+
+    return 0;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Extracts android asset
+bool AndroidJNIIOSystem::AndroidExtractAsset(std::string name) {
+    std::string newPath = mApkWorkspacePath + getOsSeparator() + name;
+
+    DefaultIOSystem io;
+
+    // Do not extract if extracted already
+    if ( io.Exists(newPath.c_str()) ) {
+        __android_log_print(ANDROID_LOG_DEFAULT, "Assimp", "Asset already extracted");
+        return true;
+    }
+	
+    // Open file
+    AAsset* asset = AAssetManager_open(mApkAssetManager, name.c_str(),
+			AASSET_MODE_UNKNOWN);
+    std::vector<char> assetContent;
+
+    if (asset != NULL) {
+        // Find size
+        off_t assetSize = AAsset_getLength(asset);
+
+        // Prepare input buffer
+        assetContent.resize(assetSize);
+
+        // Store input buffer
+        AAsset_read(asset, &assetContent[0], assetSize);
+
+        // Close
+        AAsset_close(asset);
+
+        // Prepare directory for output buffer
+        std::string directoryNewPath = newPath;
+        directoryNewPath = dirname(&directoryNewPath[0]);
+
+        if (mkpath(directoryNewPath, S_IRUSR | S_IWUSR | S_IXUSR) == -1) {
+             __android_log_print(ANDROID_LOG_ERROR, "assimp", "Can not create the directory for the output file");
+        }
+
+        // Prepare output buffer
+        std::ofstream assetExtracted(newPath.c_str(), std::ios::out | std::ios::binary);
+        if (!assetExtracted) {
+            __android_log_print(ANDROID_LOG_ERROR, "assimp", "Can not open output file");
+        }
+
+        // Write output buffer into a file
+        assetExtracted.write(&assetContent[0], assetContent.size());
+        assetExtracted.close();
+
+        __android_log_print(ANDROID_LOG_DEFAULT, "Assimp", "Asset extracted");
+    } else {
+        __android_log_print(ANDROID_LOG_ERROR, "assimp", "Asset not found: %s", name.c_str());
+        return false;
+    }
+	
+    return true;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Open a new file with a given path.
+IOStream* AndroidJNIIOSystem::Open( const char* strFile, const char* strMode) {
+    ai_assert(nullptr != strFile);
+    ai_assert(nullptr != strMode);
+
+    std::string fullPath(mApkWorkspacePath + getOsSeparator() + std::string(strFile));
+    if (Exists(strFile)) {
+	AndroidExtractAsset(std::string(strFile));
+    }
+
+    FILE* file = ::fopen( fullPath.c_str(), strMode);
+    if (nullptr == file) {
+        return nullptr;
+    }
+
+    __android_log_print(ANDROID_LOG_ERROR, "assimp", "AndroidIOSystem: file %s opened", fullPath.c_str());
+    return new DefaultIOStream(file, fullPath);
+}
+
+#undef PATHLIMIT
+#endif // __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)

Engine/lib/assimp/port/AndroidJNI/BundledAssetIOSystem.cpp

@@ -0,0 +1,80 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2021, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file Android extension of DefaultIOSystem using the standard C file functions */
+
+#include <assimp/ai_assert.h>
+#include <android/asset_manager.h>
+#include <assimp/DefaultIOStream.h>
+
+#if __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+
+#include <assimp/port/AndroidJNI/BundledAssetIOSystem.h>
+
+using namespace Assimp;
+
+/** Tests for the existence of a file at the given path. */
+bool BundledAssetIOSystem::Exists(const char* pFile) const {
+    ai_assert(NULL != mApkAssetManager);
+    AAsset *  asset = AAssetManager_open(mApkAssetManager, pFile, AASSET_MODE_UNKNOWN);
+    if (!asset) { return false; }
+    if (asset) AAsset_close(asset);
+    return true;
+}
+
+// -------------------------------------------------------------------
+/** Open a new file with a given path. */
+Assimp::IOStream* BundledAssetIOSystem::Open(const char* pFile, const char* pMode) {
+    ai_assert(NULL != mApkAssetManager);
+    AAsset *  asset = AAssetManager_open(mApkAssetManager, pFile, AASSET_MODE_UNKNOWN);
+    if (!asset) { return NULL; }
+
+    return new AssetIOStream(asset);
+}
+
+// -------------------------------------------------------------------
+/** Closes the given file and releases all resources associated with it. */
+void BundledAssetIOSystem::Close(Assimp::IOStream* pFile) {
+    delete reinterpret_cast<AssetIOStream *>(pFile);
+}
+
+#endif // __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+

Engine/lib/assimp/port/AndroidJNI/CMakeLists.txt

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.10)
+
+include_directories(./)
+include_directories(./../../)
+add_library( # Defines the name of the library.
+             android_jniiosystem
+
+             # Implements a static library.
+             STATIC
+
+             # relative path to source file(s).
+             AndroidJNIIOSystem.cpp
+             BundledAssetIOSystem.cpp
+)
+TARGET_LINK_LIBRARIES(android_jniiosystem android log)
+INSTALL(TARGETS android_jniiosystem EXPORT "${TARGETS_EXPORT_NAME}")

Engine/lib/assimp/port/AndroidJNI/README.md

@@ -0,0 +1,32 @@
+Build Asset Importer Lib for Android
+====================================
+This module provides a facade for the io-stream-access to files behind the android-asset-management within 
+an Android-native application.
+- It is built as a static library
+- It requires Android NDK with android API > 9 support.
+
+### Building ###
+To use this module please provide following cmake defines:
+```
+-DASSIMP_ANDROID_JNIIOSYSTEM=ON
+-DCMAKE_TOOLCHAIN_FILE=$SOME_PATH/android.toolchain.cmake
+```
+
+"SOME_PATH" is a path to your cmake android toolchain script.
+
+
+The build script for this port is based on [android-cmake](https://github.com/taka-no-me/android-cmake).  
+See its documentation for more Android-specific cmake options (e.g. -DANDROID_ABI for the target ABI).
+Check [Asset-Importer-Docs](https://assimp-docs.readthedocs.io/en/latest/) for more information.
+
+### Code ###
+A small example how to wrap assimp for Android:
+```cpp
+#include <assimp/port/AndroidJNI/AndroidJNIIOSystem.h>
+
+Assimp::Importer* importer = new Assimp::Importer();
+Assimp::AndroidJNIIOSystem *ioSystem = new Assimp::AndroidJNIIOSystem(app->activity);
+if ( nullptr != iosSystem ) {
+  importer->SetIOHandler(ioSystem);
+}  
+```