| Geant4 Cross Reference |
1 #ifndef tools_fpng
2 #define tools_fpng
3
4 // G.Barrand: pure header version of fpng foun
5 // The original namespace fpng had
6 // clashes with potential other usa
7
8 // fpng.h - unlicense (see end of fpng.cpp)
9
10 #include <stdlib.h>
11 #include <stdint.h>
12 #include <vector>
13
14 namespace tools {
15 namespace fpng
16 {
17 // Fast CRC-32 SSE4.1+pclmul or a scalar fal
18 const uint32_t FPNG_CRC32_INIT = 0;
19 uint32_t fpng_crc32(const void* pData, size_
20
21 // Fast Adler32 SSE4.1 Adler-32 with a scala
22 const uint32_t FPNG_ADLER32_INIT = 1;
23 uint32_t fpng_adler32(const void* pData, siz
24
25 // ---- Compression
26 enum
27 {
28 // Enables computing custom Huffman tables
29 // Results in roughly 6% smaller files on
30 FPNG_ENCODE_SLOWER = 1,
31
32 // Only use raw Deflate blocks (no compres
33 FPNG_FORCE_UNCOMPRESSED = 2,
34 };
35
36 // Fast PNG encoding. The resulting file can
37 // pImage: pointer to RGB or RGBA image pixe
38 // w/h - image dimensions. Image's row pitch
39 // num_chans must be 3 or 4.
40 bool fpng_encode_image_to_memory(const void*
41
42 // Fast PNG encoding to the specified file.
43 bool fpng_encode_image_to_file(const char* p
44
45 // ---- Decompression
46
47 enum
48 {
49 FPNG_DECODE_SUCCESS = 0, // file is
50
51 FPNG_DECODE_NOT_FPNG, // file is a
52
53 FPNG_DECODE_INVALID_ARG, // invalid
54
55 FPNG_DECODE_FAILED_NOT_PNG, // file
56 FPNG_DECODE_FAILED_HEADER_CRC32, // a c
57 FPNG_DECODE_FAILED_INVALID_DIMENSIONS, //
58 FPNG_DECODE_FAILED_DIMENSIONS_TOO_LARGE, /
59 FPNG_DECODE_FAILED_CHUNK_PARSING, // fai
60 FPNG_DECODE_FAILED_INVALID_IDAT, // IDA
61
62 // fpng_decode_file() specific errors
63 FPNG_DECODE_FILE_OPEN_FAILED,
64 FPNG_DECODE_FILE_TOO_LARGE,
65 FPNG_DECODE_FILE_READ_FAILED,
66 FPNG_DECODE_FILE_SEEK_FAILED
67 };
68
69 // Fast PNG decoding of files ONLY created b
70 // If fpng_get_info() or fpng_decode_memory(
71 //
72 // fpng_get_info() parses the PNG header and
73 //
74 // pImage, image_size: Pointer to PNG image
75 // width, height: output image's dimensions
76 // channels_in_file: will be 3 or 4
77 //
78 // Returns FPNG_DECODE_SUCCESS on success, o
79 // If FPNG_DECODE_NOT_FPNG is returned, you
80 // If another error occurs, the file is like
81 int fpng_get_info(const void* pImage, uint32
82
83 // fpng_decode_memory() decompresses 24/32bp
84 // If the image was written by FPNG, it will
85 //
86 // pImage, image_size: Pointer to PNG image
87 // out: Output 24/32bpp image buffer
88 // width, height: output image's dimensions
89 // channels_in_file: will be 3 or 4
90 // desired_channels: must be 3 or 4
91 //
92 // If the image is 24bpp and 32bpp is reques
93 // If the image is 32bpp and 24bpp is reques
94 //
95 // Returns FPNG_DECODE_SUCCESS on success, o
96 // If FPNG_DECODE_NOT_FPNG is returned, you
97 // If another error occurs, the file is like
98 int fpng_decode_memory(const void* pImage, u
99
100 int fpng_decode_file(const char* pFilename,
101
102 } // namespace fpng
103 } // namespace tools
104
105 //G.Barrand specific:
106 #include "fpng.icc"
107
108 #include "sout"
109
110 #include <ostream>
111
112 namespace tools {
113 namespace fpng {
114
115 inline bool write(std::ostream& a_out,
116 const std::string& a_file,
117 unsigned char* a_buffer,
118 unsigned int a_width,
119 unsigned int a_height,
120 unsigned int a_bpp) {
121 if((a_bpp!=3)&&(a_bpp!=4)) {
122 a_out << "tools::fpng::write : bpp " << a_
123 return false;
124 }
125 if(!fpng_encode_image_to_file(a_file.c_str()
126 a_out << "tools::fpng::write : encode() fa
127 return false;
128 }
129 return true;
130 }
131
132 }}
133
134 #endif //tools_fpng