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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_RS_FILE_A3D_H
     18 #define ANDROID_RS_FILE_A3D_H
     19 
     20 #include "RenderScript.h"
     21 #include "rsFileA3DDecls.h"
     22 #include "rsMesh.h"
     23 
     24 #include <utils/String8.h>
     25 #include <stdio.h>
     26 
     27 // ---------------------------------------------------------------------------
     28 namespace android {
     29 namespace renderscript {
     30 
     31 class FileA3D
     32 {
     33 public:
     34     FileA3D();
     35     ~FileA3D();
     36 
     37     uint32_t mMajorVersion;
     38     uint32_t mMinorVersion;
     39     uint64_t mIndexOffset;
     40     uint64_t mStringTableOffset;
     41     bool mUse64BitOffsets;
     42 
     43     struct A3DIndexEntry {
     44         String8 mID;
     45         A3DChunkType mType;
     46         uint64_t mOffset;
     47         void * mRsObj;
     48     };
     49 
     50     bool load(Context *rsc, FILE *f);
     51 
     52 protected:
     53     class IO
     54     {
     55     public:
     56         IO(const uint8_t *, bool use64);
     57 
     58         float loadF() {
     59             mPos = (mPos + 3) & (~3);
     60             float tmp = reinterpret_cast<const float *>(&mData[mPos])[0];
     61             mPos += sizeof(float);
     62             return tmp;
     63         }
     64         int32_t loadI32() {
     65             mPos = (mPos + 3) & (~3);
     66             int32_t tmp = reinterpret_cast<const int32_t *>(&mData[mPos])[0];
     67             mPos += sizeof(int32_t);
     68             return tmp;
     69         }
     70         uint32_t loadU32() {
     71             mPos = (mPos + 3) & (~3);
     72             uint32_t tmp = reinterpret_cast<const uint32_t *>(&mData[mPos])[0];
     73             mPos += sizeof(uint32_t);
     74             return tmp;
     75         }
     76         uint16_t loadU16() {
     77             mPos = (mPos + 1) & (~1);
     78             uint16_t tmp = reinterpret_cast<const uint16_t *>(&mData[mPos])[0];
     79             mPos += sizeof(uint16_t);
     80             return tmp;
     81         }
     82         uint8_t loadU8() {
     83             uint8_t tmp = reinterpret_cast<const uint8_t *>(&mData[mPos])[0];
     84             mPos += sizeof(uint8_t);
     85             return tmp;
     86         }
     87         uint64_t loadOffset();
     88         void loadString(String8 *s);
     89         uint64_t getPos() const {return mPos;}
     90         const uint8_t * getPtr() const;
     91     protected:
     92         const uint8_t * mData;
     93         uint64_t mPos;
     94         bool mUse64;
     95     };
     96 
     97 
     98     bool process(Context *rsc);
     99     bool processIndex(Context *rsc, A3DIndexEntry *);
    100     void processChunk_Mesh(Context *rsc, IO *io, A3DIndexEntry *ie);
    101     void processChunk_Primitive(Context *rsc, IO *io, A3DIndexEntry *ie);
    102     void processChunk_Verticies(Context *rsc, IO *io, A3DIndexEntry *ie);
    103     void processChunk_Element(Context *rsc, IO *io, A3DIndexEntry *ie);
    104     void processChunk_ElementSource(Context *rsc, IO *io, A3DIndexEntry *ie);
    105 
    106     const uint8_t * mData;
    107     void * mAlloc;
    108     uint64_t mDataSize;
    109     Context * mRsc;
    110 
    111     Vector<A3DIndexEntry> mIndex;
    112     Vector<String8> mStrings;
    113     Vector<uint32_t> mStringIndexValues;
    114 
    115 };
    116 
    117 
    118 }
    119 }
    120 #endif //ANDROID_RS_FILE_A3D_H
    121 
    122 
    123