Ogre 1.9 Android移植

上一篇博客，将1.8.1这个版本移植到了Android平台，无奈着不是官方版本，不太完美。这次尝试为Android平台构建1.9版本（注意这是个不稳定版本，1.9官方没有正式Release）。

依赖库官方已经移植好了，直接下载下来就可以了。

地址 http://sourceforge.net/projects/ogre/files/ogre-dependencies-android/1.9/AndroidDependencies.zip/download

具体的移植步骤，请看这里的官方文档，很详细了。我就说几个移植中需要注意的地方。

Android NDK我选的是官方的android-ndk-r8d，顺利的移植了，其他版本无一幸免都有无法检测编译机器类型的错误，应该是Ogre使用的android-cmake版本的问题，具体我没有细究。

环境变量ANDROID_NDK别忘了，这个是android-cmake脚本要用到的。

编译出来的，SampleOgreBrowserNDK这个安装包的resources.cfg有点小问题，我做了点修改，修改如下：

# Resources required by the sample browser and most samples.
[Essential]
APKZip=/packs/SdkTrays.zip
APKFileSystem=/thumbnails

# Common sample resources needed by many of the samples.
# Rarely used resources should be separately loaded by the
# samples which require them.
[Popular]
APKFileSystem=/fonts
APKFileSystem=/materials/programs
APKFileSystem=/materials/programs/GLSLES
APKFileSystem=/materials/scripts
APKFileSystem=/materials/textures
APKFileSystem=/materials/textures/nvidia
APKFileSystem=/models
APKFileSystem=/particle
APKFileSystem=/RTShaderLib
APKFileSystem=/RTShaderLib/materials
APKFileSystem=/RTShaderLib/GLSLES
APKFileSystem=/materials/scripts/SSAO
APKFileSystem=/materials/textures/SSAO
APKZip=/packs/cubemap.zip
APKZip=/packs/cubemapsJS.zip
APKZip=/packs/dragon.zip
APKZip=/packs/fresneldemo.zip
APKZip=/packs/ogretestmap.zip
APKZip=/packs/ogredance.zip
APKZip=/packs/Sinbad.zip
APKZip=/packs/skybox.zip

[General]
APKFileSystem=/

编译出来的库都是静态链接的，一堆依赖，稍不留神就出问题，可能本人水平不够吧。

写了个测试程序，SampleBrowser这个项目一堆#ifdef，看着真心头疼，自己写了个简单的Android测试程序。

先上代码:

//File: main.cpp

#include <OgrePlatform.h>
#include <OgreRoot.h>
#include <EGL/egl.h>
#include <GLES/gl.h>

#include <android/log.h>
#include <android_native_app_glue.h>

#ifdef OGRE_STATIC_LIB
#include <OgreStaticPluginLoader.h>
#endif

#ifdef USE_RTSHADER_SYSTEM
# include "OgreRTShaderSystem.h"
#endif

#include "Android/OgreAPKFileSystemArchive.h"
#include "Android/OgreAPKZipArchive.h"
#include "ANDROID/OgreAndroidEGLWindow.h"

#define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, "Ogre", __VA_ARGS__))
#define LOGW(...) ((void)__android_log_print(ANDROID_LOG_WARN, "Ogre", __VA_ARGS__))

#ifdef OGRE_STATIC_LIB
Ogre::StaticPluginLoader* gStaticPluginLoader;
#endif

Ogre::Root* gRoot = NULL;
Ogre::RenderWindow* gWnd = NULL;
AAssetManager* gAssetMgr = NULL;
bool bInit = false;

static Ogre::DataStreamPtr openAPKFile(const Ogre::String& fileName)
{
Ogre::DataStreamPtr stream;
AAsset* asset = AAssetManager_open(gAssetMgr, fileName.c_str(), AASSET_MODE_BUFFER);
if(asset) {
off_t length = AAsset_getLength(asset);
void* membuf = OGRE_MALLOC(length, Ogre::MEMCATEGORY_GENERAL);
memcpy(membuf, AAsset_getBuffer(asset), length);
AAsset_close(asset);

stream = Ogre::DataStreamPtr(new Ogre::MemoryDataStream(membuf, length, true, true));
}

return stream;
}

static void handleCmd(struct android_app* app, int32_t cmd)
{
switch(cmd)
{
case APP_CMD_INIT_WINDOW:
if(app->window && gRoot) {
AConfiguration* config = AConfiguration_new();
AConfiguration_fromAssetManager(config, app->activity->assetManager);

if(!gWnd) {
LOGW("APP_CMD_INIT_WINDOW");
Ogre::NameValuePairList opt;
opt["externalWindowHandle"] = Ogre::StringConverter::toString((int)app->window);
opt["androidConfig"] = Ogre::StringConverter::toString((int)config);
gWnd = Ogre::Root::getSingleton().createRenderWindow("OgreWindow", 0, 0, false, &opt);

if(gWnd->isFullScreen()) {
LOGW("Window Is Fullscreen");
}

Ogre::Root::getSingleton().getRenderSystem()->_initRenderTargets();

// Clear event times
Ogre::Root::getSingleton().clearEventTimes();

LOGI("CreateSceneManager Begin");
Ogre::SceneManager* sm = gRoot->createSceneManager(Ogre::ST_GENERIC, "DummyScene");
LOGI("CreateSceneManager End");

Ogre::Camera* cam = sm->createCamera("DummyCamera");
cam->setPosition(Ogre::Vector3(20, 80, 50));
cam->lookAt(Ogre::Vector3(0, 0, 0));
cam->setNearClipDistance(5);

Ogre::Viewport* vp = gWnd->addViewport(cam);
vp->setBackgroundColour(Ogre::ColourValue(0.9, 0.9, 0.9));

Ogre::Real fWidth = vp->getActualWidth();
Ogre::Real fHeight = vp->getActualHeight();
LOGW("fWidth: %f, fHeight: %f", fWidth, fHeight);

cam->setAspectRatio(Ogre::Real(vp->getActualWidth()) / Ogre::Real(vp->getActualHeight()));

Ogre::TextureManager::getSingleton().setDefaultNumMipmaps(5);

sm->setAmbientLight(Ogre::ColourValue(0.9, 0.9, 0.9));
sm->createLight()->setPosition(20, 80, 50);

sm->setSkyBox(true, "Examples/CloudyNoonSkyBox");
Ogre::Entity* head = sm->createEntity("Head", "ogrehead.mesh");
Ogre::Entity* head2 = sm->createEntity("Head2", "r5capsule.mesh");

Ogre::SceneNode* headNode = sm->getRootSceneNode()->createChildSceneNode();
headNode->attachObject(head);
headNode->setPosition(0, 0, 0);

Ogre::SceneNode* headNode2 = sm->getRootSceneNode()->createChildSceneNode();
headNode2->attachObject(head2);
headNode2->setPosition(0, 10, 0);

gWnd->windowMovedOrResized();
bInit = true;
}else
{
static_cast<Ogre::AndroidEGLWindow*>(gWnd)->_createInternalResources(app->window, config);
}

AConfiguration_delete(config);
}
break;
}
}

void android_main(struct android_app* state)
{
app_dummy();

gAssetMgr = state->activity->assetManager;

struct android_pool_source* source;

state->onAppCmd = &handleCmd;
gRoot = new Ogre::Root();

//#ifdef OGRE_STATIC_LIB
LOGI("Load Plugin");
gStaticPluginLoader = new Ogre::StaticPluginLoader();
gStaticPluginLoader->load();
LOGI("Load Plugin End");
//#endif
Ogre::ArchiveManager::getSingleton().addArchiveFactory(new Ogre::APKFileSystemArchiveFactory(gAssetMgr));
Ogre::ArchiveManager::getSingleton().addArchiveFactory(new Ogre::APKZipArchiveFactory(gAssetMgr));

gRoot->setRenderSystem(gRoot->getAvailableRenderers().at(0));
gRoot->initialise(false);

Ogre::ConfigFile cf;
cf.load(openAPKFile("resources.cfg"));

Ogre::ConfigFile::SectionIterator seci = cf.getSectionIterator();
Ogre::String sec, type, arch;

while(seci.hasMoreElements()) {
sec = seci.peekNextKey();
Ogre::ConfigFile::SettingsMultiMap* settings = seci.getNext();
Ogre::ConfigFile::SettingsMultiMap::iterator i;

for(i = settings->begin(); i != settings->end(); i++) {
type = i->first;
arch = i->second;

LOGI("arch: %s, type: %s, sec: %s", arch.c_str(), type.c_str(), sec.c_str());
Ogre::ResourceGroupManager::getSingleton().addResourceLocation(arch, type, sec);
}
}

Ogre::ResourceGroupManager::getSingleton().initialiseAllResourceGroups();

while (1) {

int ident;
int events;
struct android_poll_source* source;

while ((ident=ALooper_pollAll(0, NULL, &events,
(void**)&source)) >= 0) {

// Process this event.
if (source != NULL)
source->process(state, source);

if(state->destroyRequested != 0)
return;

}

if(gWnd != NULL && gWnd->isActive()) {
gWnd->windowMovedOrResized();
gRoot->renderOneFrame();
}
}
}

使用了NativeActivity，所以不用写一行Java代码。(NativeActivity Android NKD中有个例子，代码不明白的话可以参考一下）。接着是Android.mk

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)

LOCAL_MODULE := andogre

LOCAL_SRC_FILES := main.cpp

LOCAL_LDLIBS := -landroid -lc -lm -ldl -llog -lEGL -lGLESv2
LOCAL_LDLIBS += -L$(MY_HOME)/android/ogre-v1-9/lib -L$(MY_HOME)/android/AndroidDependencies/lib/armeabi
LOCAL_LDLIBS += -lPlugin_ParticleFXStatic -lPlugin_OctreeSceneManagerStatic -lRenderSystem_GLES2Static
LOCAL_LDLIBS += -lOgreRTShaderSystemStatic -lOgreOverlayStatic -lOgreMainStatic
LOCAL_LDLIBS += -lzzip -lz -lFreeImage -lfreetype -lOIS $(MY_HOME)/android/systemlibs/armeabi/libsupc++.a $(MY_HOME)/android/systemlibs/armeabi/libstdc++.a D:/workspace/AndOgre/obj/local/armeabi/libcpufeatures.a

LOCAL_STATIC_LIBRARIES := android_native_app_glue cpufeatures

LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES=1 -I$(MY_HOME)/android/ogre-v1-9/include/OGRE
LOCAL_CFLAGS += -I$(MY_HOME)/android/ogre-v1-9/include/OGRE/Android
LOCAL_CFLAGS += -I$(MY_HOME)/android/ogre-v1-9/include/OGRE/Overlay
LOCAL_CFLAGS += -I$(MY_HOME)/android/ogre-v1-9/include/OGRE/Plugins/OctreeSceneManager
LOCAL_CFLAGS += -I$(MY_HOME)/android/ogre-v1-9/include/OGRE/Plugins/ParticleFX
LOCAL_CFLAGS += -I$(MY_HOME)/android/ogre-v1-9/include/OGRE/RenderSystems/GLES2
LOCAL_CFLAGS += -I$(MY_HOME)/android/ogre-v1-9/include/OGRE/RTShaderSystem
LOCAL_CFLAGS += -ID:/android-ndk-r8d/sources/cpufeatures
LOCAL_CFLAGS += -I$(MY_HOME)/android/AndroidDependencies/include
LOCAL_CFLAGS += -I$(MY_HOME)/android/AndroidDependencies/include/OIS
LOCAL_CFLAGS += -fexceptions -frtti -x c++ -D___ANDROID___ -DANDROID -DZZIP_OMIT_CONFIG_H -DUSE_RTSHADER_SYSTEM=1
LOCAL_CFLAGS += -DOGRE_STATIC_GLES2 -DOGRE_STATIC_OctreeSceneManager -DOGRE_STATIC_ParticleFX

include $(BUILD_SHARED_LIBRARY)

$(call import-module, android/native_app_glue)
$(call import-module, android/cpufeatures)

Application.mk文件：

APP_ABI := armeabi
APP_STL := gnustl_static

为了使用NativeActivity，AndroidManifest.xml得改一下，要不然系统不能识别到NativityActivity

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="cloud.example.andogre"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />

<-- 无java代码 -->

<application android:allowBackup="true" android:label="@string/app_name" android:hasCode="false">

<-- 这里，告诉系统Activity是NativeActivity -->
<activity android:name="android.app.NativeActivity"
android:label="@string/app_name"
android:configChanges="orientation|keyboardHidden"
android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" >
<!-- Tell NativeActivity the name of or .so -->
<meta-data android:name="android.app.lib_name"
android:value="andogre" />
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>

以上就是全部内容。欢迎指正