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