assimp.assimp/include/assimp/port/AndroidJNI/BundledAssetIOSystem.h

/*
Open Asset Import Library (assimp)
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All rights reserved.

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  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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*/

/** @file Android implementation of IOSystem using the standard C file functions.
 * Aimed to ease the access to android assets */

#if __ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
#ifndef AI_BUNDLEDASSETIOSYSTEM_H_INC
#define AI_BUNDLEDASSETIOSYSTEM_H_INC

#include <android/asset_manager_jni.h>

#include <assimp/DefaultIOSystem.h>
#include <assimp/IOStream.hpp>

namespace Assimp {

class BundledAssetIOSystem : public Assimp::DefaultIOSystem {

public:
    AAssetManager* mApkAssetManager;

    BundledAssetIOSystem(JNIEnv* env, jobject assetManager) { mApkAssetManager = AAssetManager_fromJava(env, assetManager); }
    ~BundledAssetIOSystem() {};

    bool Exists( const char* pFile) const;

    Assimp::IOStream* Open( const char* pFile, const char* pMode = "rb");

    void Close( Assimp::IOStream* pFile);

private:

    class AssetIOStream : public Assimp::IOStream {
        AAsset * asset;

    public:
        AssetIOStream(AAsset *asset) { this->asset = asset; };
        ~AssetIOStream() { AAsset_close(asset); }

        size_t Read(void* pvBuffer, size_t pSize, size_t pCount) { return AAsset_read(asset, pvBuffer, pSize * pCount);}
        size_t Write(const void* pvBuffer, size_t pSize, size_t pCount) { return 0; };
        aiReturn Seek(size_t pOffset, aiOrigin pOrigin) { return (AAsset_seek(asset, pOffset, pOrigin) >= 0 ? aiReturn_SUCCESS : aiReturn_FAILURE); }
        size_t Tell() const { return(AAsset_getLength(asset) - AAsset_getRemainingLength(asset)); };
        size_t FileSize() const  { return  AAsset_getLength(asset); }
        void Flush() { }
    };

};


} //!ns Assimp

#endif //AI_BUNDLEDASSETIOSYSTEM_H_INC
#endif //__ANDROID__ and __ANDROID_API__ > 9 and defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)