Ptex
PtexIO.h
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1 #ifndef PtexIO_h
2 #define PtexIO_h
3 
4 /*
5 PTEX SOFTWARE
6 Copyright 2014 Disney Enterprises, Inc. All rights reserved
7 
8 Redistribution and use in source and binary forms, with or without
9 modification, are permitted provided that the following conditions are
10 met:
11 
12  * Redistributions of source code must retain the above copyright
13  notice, this list of conditions and the following disclaimer.
14 
15  * Redistributions in binary form must reproduce the above copyright
16  notice, this list of conditions and the following disclaimer in
17  the documentation and/or other materials provided with the
18  distribution.
19 
20  * The names "Disney", "Walt Disney Pictures", "Walt Disney Animation
21  Studios" or the names of its contributors may NOT be used to
22  endorse or promote products derived from this software without
23  specific prior written permission from Walt Disney Pictures.
24 
25 Disclaimer: THIS SOFTWARE IS PROVIDED BY WALT DISNEY PICTURES AND
26 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
27 BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
28 FOR A PARTICULAR PURPOSE, NONINFRINGEMENT AND TITLE ARE DISCLAIMED.
29 IN NO EVENT SHALL WALT DISNEY PICTURES, THE COPYRIGHT HOLDER OR
30 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
31 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
32 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
33 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND BASED ON ANY
34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
37 */
38 
39 #include "Ptexture.h"
40 
42 
43 #pragma pack(push, 1)
44 struct Header {
45  uint32_t magic;
46  uint32_t version;
47  uint32_t meshtype;
48  uint32_t datatype;
49  int32_t alphachan;
50  uint16_t nchannels;
51  uint16_t nlevels;
52  uint32_t nfaces;
53  uint32_t extheadersize;
54  uint32_t faceinfosize;
55  uint32_t constdatasize;
56  uint32_t levelinfosize;
57  uint32_t minorversion;
58  uint64_t leveldatasize;
59  uint32_t metadatazipsize;
60  uint32_t metadatamemsize;
61  int pixelSize() const { return DataSize(DataType(datatype)) * nchannels; }
62  bool hasAlpha() const { return alphachan >= 0 && alphachan < nchannels; }
63 };
64 struct ExtHeader {
65  uint16_t ubordermode;
66  uint16_t pad;
67  uint16_t vbordermode;
68  uint16_t edgefiltermode;
69  uint32_t lmdheaderzipsize;
70  uint32_t lmdheadermemsize;
71  uint64_t lmddatasize;
72  uint64_t editdatasize;
73  uint64_t editdatapos;
74 };
75 struct LevelInfo {
76  uint64_t leveldatasize;
77  uint32_t levelheadersize;
78  uint32_t nfaces;
80 };
83  uint32_t data; // bits 0..29 = blocksize, bits 30..31 = encoding
84  uint32_t blocksize() const { return data & 0x3fffffff; }
85  Encoding encoding() const { return Encoding((data >> 30) & 0x3); }
86  uint32_t& val() { return *(uint32_t*) this; }
87  const uint32_t& val() const { return *(const uint32_t*) this; }
88  void set(uint32_t blocksizeArg, Encoding encodingArg)
89  { data = (blocksizeArg & 0x3fffffff) | ((encodingArg & 0x3) << 30); }
90  FaceDataHeader() : data(0) {}
91 };
94  uint32_t faceid;
95  FaceInfo faceinfo;
97 };
99  uint32_t metadatazipsize;
100  uint32_t metadatamemsize;
101 };
102 #pragma pack(pop)
103 
104 const uint32_t Magic = 'P' | ('t'<<8) | ('e'<<16) | ('x'<<24);
105 const int HeaderSize = sizeof(Header);
106 const int ExtHeaderSize = sizeof(ExtHeader);
107 const int LevelInfoSize = sizeof(LevelInfo);
108 const int FaceDataHeaderSize = sizeof(FaceDataHeader);
111 
112 // these constants can be tuned for performance
113 const int IBuffSize = 8192; // default input buffer size
114 const int BlockSize = 16384; // target block size for file I/O
115 const int TileSize = 65536; // target tile size (uncompressed)
116 const int AllocaMax = 16384; // max size for using alloca
117 const int MetaDataThreshold = 1024; // cutoff for large meta data
118 
119 inline bool LittleEndian() {
120  short word = 0x0201;
121  return *(char*)&word == 1;
122 }
123 
125 
126 #endif
const uint32_t Magic
Definition: PtexIO.h:104
const int EditMetaDataHeaderSize
Definition: PtexIO.h:110
const int FaceDataHeaderSize
Definition: PtexIO.h:108
const int ExtHeaderSize
Definition: PtexIO.h:106
const int EditFaceDataHeaderSize
Definition: PtexIO.h:109
const int AllocaMax
Definition: PtexIO.h:116
const int HeaderSize
Definition: PtexIO.h:105
const int IBuffSize
Definition: PtexIO.h:113
const int LevelInfoSize
Definition: PtexIO.h:107
const int BlockSize
Definition: PtexIO.h:114
bool LittleEndian()
Definition: PtexIO.h:119
EditType
Definition: PtexIO.h:92
@ et_editfacedata
Definition: PtexIO.h:92
@ et_editmetadata
Definition: PtexIO.h:92
const int TileSize
Definition: PtexIO.h:115
Encoding
Definition: PtexIO.h:81
@ enc_diffzipped
Definition: PtexIO.h:81
@ enc_zipped
Definition: PtexIO.h:81
@ enc_constant
Definition: PtexIO.h:81
@ enc_tiled
Definition: PtexIO.h:81
const int MetaDataThreshold
Definition: PtexIO.h:117
#define PTEX_NAMESPACE_END
Definition: PtexVersion.h:62
Public API classes for reading, writing, caching, and filtering Ptex files.
int DataSize(DataType dt)
Look up size of given data type (in bytes).
Definition: Ptexture.h:130
DataType
Type of data stored in texture file.
Definition: Ptexture.h:72
uint32_t faceid
Definition: PtexIO.h:94
FaceDataHeader fdh
Definition: PtexIO.h:96
FaceInfo faceinfo
Definition: PtexIO.h:95
uint32_t metadatazipsize
Definition: PtexIO.h:99
uint32_t metadatamemsize
Definition: PtexIO.h:100
uint16_t edgefiltermode
Definition: PtexIO.h:68
uint16_t vbordermode
Definition: PtexIO.h:67
uint16_t ubordermode
Definition: PtexIO.h:65
uint64_t lmddatasize
Definition: PtexIO.h:71
uint64_t editdatapos
Definition: PtexIO.h:73
uint16_t pad
Definition: PtexIO.h:66
uint32_t lmdheadermemsize
Definition: PtexIO.h:70
uint32_t lmdheaderzipsize
Definition: PtexIO.h:69
uint64_t editdatasize
Definition: PtexIO.h:72
void set(uint32_t blocksizeArg, Encoding encodingArg)
Definition: PtexIO.h:88
const uint32_t & val() const
Definition: PtexIO.h:87
Encoding encoding() const
Definition: PtexIO.h:85
uint32_t blocksize() const
Definition: PtexIO.h:84
uint32_t & val()
Definition: PtexIO.h:86
FaceDataHeader()
Definition: PtexIO.h:90
uint32_t data
Definition: PtexIO.h:83
Definition: PtexIO.h:44
uint32_t metadatamemsize
Definition: PtexIO.h:60
uint32_t faceinfosize
Definition: PtexIO.h:54
uint16_t nlevels
Definition: PtexIO.h:51
uint16_t nchannels
Definition: PtexIO.h:50
uint32_t meshtype
Definition: PtexIO.h:47
uint32_t constdatasize
Definition: PtexIO.h:55
uint32_t levelinfosize
Definition: PtexIO.h:56
uint32_t extheadersize
Definition: PtexIO.h:53
uint32_t minorversion
Definition: PtexIO.h:57
uint32_t metadatazipsize
Definition: PtexIO.h:59
uint32_t datatype
Definition: PtexIO.h:48
int pixelSize() const
Definition: PtexIO.h:61
int32_t alphachan
Definition: PtexIO.h:49
uint32_t magic
Definition: PtexIO.h:45
uint32_t nfaces
Definition: PtexIO.h:52
uint64_t leveldatasize
Definition: PtexIO.h:58
uint32_t version
Definition: PtexIO.h:46
bool hasAlpha() const
Definition: PtexIO.h:62
uint32_t levelheadersize
Definition: PtexIO.h:77
LevelInfo()
Definition: PtexIO.h:79
uint64_t leveldatasize
Definition: PtexIO.h:76
uint32_t nfaces
Definition: PtexIO.h:78