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 "rsMesh.h"
21 
22 #include "rsStream.h"
23 #include <stdio.h>
24 
25 #define A3D_MAGIC_KEY "Android3D_ff"
26 
27 // ---------------------------------------------------------------------------
28 namespace android {
29     class Asset;
30 
31 namespace renderscript {
32 
33 class FileA3D : public ObjectBase {
34 public:
35     FileA3D(Context *rsc);
36     ~FileA3D();
37 
38     uint32_t mMajorVersion;
39     uint32_t mMinorVersion;
40     uint64_t mIndexOffset;
41     uint64_t mStringTableOffset;
42     bool mUse64BitOffsets;
43 
44     class A3DIndexEntry {
45         const char *mObjectName;
46         RsA3DClassID mType;
47         uint64_t mOffset;
48         uint64_t mLength;
49         ObjectBase *mRsObj;
50     public:
51         friend class FileA3D;
getObjectName()52         const char *getObjectName() const {
53             return mObjectName;
54         }
getType()55         RsA3DClassID getType() const {
56             return mType;
57         }
58 
59         ~A3DIndexEntry();
60     };
61 
62     bool load(FILE *f);
63     bool load(Asset *asset);
64     bool load(const void *data, size_t length);
65 
66     size_t getNumIndexEntries() const;
67     const A3DIndexEntry* getIndexEntry(size_t index) const;
68     ObjectBase *initializeFromEntry(size_t index);
69 
70     void appendToFile(Context *rsc, ObjectBase *obj);
71     bool writeFile(const char *filename);
72 
73     // Currently files do not get serialized,
74     // but we need to inherit from ObjectBase for ref tracking
serialize(Context * rsc,OStream * stream)75     virtual void serialize(Context *rsc, OStream *stream) const {
76     }
getClassId()77     virtual RsA3DClassID getClassId() const {
78         return RS_A3D_CLASS_ID_UNKNOWN;
79     }
80 
81 protected:
82 
83     void parseHeader(IStream *headerStream);
84 
85     const uint8_t * mData;
86     void * mAlloc;
87     uint64_t mDataSize;
88     Asset *mAsset;
89 
90     OStream *mWriteStream;
91     Vector<A3DIndexEntry*> mWriteIndex;
92 
93     IStream *mReadStream;
94     Vector<A3DIndexEntry*> mIndex;
95 };
96 
97 
98 }
99 }
100 #endif //ANDROID_RS_FILE_A3D_H
101 
102 
103