A Portable Floating-Point-Based Image Format: pfi.h Source File

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00001 /*
00002  * Interface of the PFI library, a portable format to store 
00003  * images with a double representation for every pixel of the same 
00004  * color...
00005  *
00006  * Compatibility: ANSI 
00007  *
00008  * $Date$
00009  * $Revision$
00010  *
00011  */
00012 
00013 #ifndef PFI_H__
00014 #define PFI_H__
00015 
00016 #ifdef __cplusplus
00017 extern "C" {
00018 #endif /* __cplusplus */
00019 
00020 #include <stdio.h>
00021 #if defined (__GNUC__) && !defined (__USE_GNU)
00022 #define __USE_GNU
00023 #endif
00024 #include <limits.h>
00025 
00026 #define PFI_VERSION "1.2"
00027 
00028 #define PFI_EPSILON (3 * DBL_EPSILON)
00029 
00030 /*
00031  * Have this thing ignored on non-Windows platforms:
00032  */
00033 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined __WATCOMC__
00034 # define DLL_EXPORT __declspec(dllexport) 
00035 #else
00036 # define DLL_EXPORT
00037 #endif
00038 
00039 #if defined (__GNUC__) && defined (__i386__) && (__GNUC__ >= 2) 
00040 
00041 typedef unsigned short pfiu16;
00042 typedef unsigned long pfiu32;
00043 #define PFIU16_MAX USHRT_MAX
00044 #define PFIU32_MAX ULONG_MAX
00045 
00046 #define PFI_BYTE_SWAP 1
00047 
00048 #elif defined (__WATCOMC__) 
00049 
00050 typedef unsigned short pfiu16;
00051 typedef unsigned long pfiu32;
00052 #define PFIU16_MAX USHRT_MAX
00053 #define PFIU32_MAX ULONG_MAX
00054 
00055 #define PFI_BYTE_SWAP 1
00056 
00057 #elif defined (__INTEL_COMPILER) && (__INTEL_COMPILER >= 60)
00058 
00059 typedef unsigned short pfiu16;
00060 typedef unsigned long pfiu32;
00061 #define PFIU16_MAX USHRT_MAX
00062 #define PFIU32_MAX ULONG_MAX
00063 
00064 #define PFI_BYTE_SWAP 1
00065 
00066 #elif defined (__GNUC__) && defined (__sparc__) && (__GNUC__ >= 2) \
00067   && !(defined (__sparcv9) || defined (__sparc_v9__)) 
00068 
00069 typedef unsigned short pfiu16;
00070 typedef unsigned long pfiu32;
00071 #define PFIU16_MAX USHRT_MAX
00072 #define PFIU32_MAX ULONG_MAX
00073 
00074 #define PFI_BYTE_SWAP 0
00075 
00076 #elif defined (__sgi) && defined (__host_mips) && defined (_MIPSEB) \
00077   && defined (_MIPS_SZLONG) && _MIPS_SZLONG == 32
00078 
00079 typedef unsigned short pfiu16;
00080 typedef unsigned long pfiu32;
00081 #define PFIU16_MAX USHRT_MAX
00082 #define PFIU32_MAX ULONG_MAX
00083 
00084 #define PFI_BYTE_SWAP 0
00085 
00086 #elif defined (__LCLINT__)
00087 
00088 typedef unsigned short pfiu16;
00089 typedef unsigned long pfiu32;
00090 #define PFIU16_MAX USHRT_MAX
00091 #define PFIU32_MAX ULONG_MAX
00092 
00093 #elif defined (_MSC_VER) 
00094 #ifdef DPRINTF
00095 #undef DPRINTF
00096 #endif
00097 #define snprintf _snprintf
00098 typedef unsigned short pfiu16;
00099 typedef unsigned long pfiu32;
00100 #define PFIU16_MAX USHRT_MAX
00101 #define PFIU32_MAX ULONG_MAX
00102 
00103 #define PFI_BYTE_SWAP 1
00104 
00105 #else
00106 #error "I don't know your system, configure me!"
00107 #endif
00108 
00109 #if PFI_BYTE_SWAP
00110 
00111 #define PFI_BSWAP16(x) ((pfiu16) (                      \
00112         (((pfiu16)(x) & (pfiu16) 0x00ffU) << 8) |       \
00113         (((pfiu16)(x) & (pfiu16) 0xff00U) >> 8) ))  
00114  
00115 #define PFI_BSWAP32(x) ((pfiu32)(                       \
00116         (((pfiu32)(x) & (pfiu32)0x000000ffUL) << 24) |  \
00117         (((pfiu32)(x) & (pfiu32)0x0000ff00UL) <<  8) |  \
00118         (((pfiu32)(x) & (pfiu32)0x00ff0000UL) >>  8) |  \
00119         (((pfiu32)(x) & (pfiu32)0xff000000UL) >> 24) ))
00120 
00121 #define pfi_htof32(x)  PFI_BSWAP32 (x)
00122 #define pfi_ftoh32(x)  PFI_BSWAP32 (x)
00123 #define pfi_htof16(x)  PFI_BSWAP16 (x)
00124 #define pfi_ftoh16(x)  PFI_BSWAP16 (x)
00125 
00126 #else
00127 
00128 #define pfi_htof32(x)  (x)
00129 #define pfi_ftoh32(x)  (x)
00130 #define pfi_htof16(x)  (x)
00131 #define pfi_ftoh16(x)  (x)
00132 
00133 #endif /* PFI_BYTE_SWAP */
00134   
00136 enum { pfi_grey = 0, pfi_rgb, pfi_yuv, pfi_unknown };
00137   
00138 
00139 /*@-exportlocal@*/
00140 int pfi_getv (FILE *stream, /*@exposed@*//*@out@*/double *valp);
00141 int pfi_putv (FILE *stream, double val);
00142 int pfi_properties (FILE *stream, int *rows, int *cols, 
00143                     int *colors, int *colormodel);
00144 /*@null@*//*@only@*/double *pfi_read (FILE *stream, int *rows, int *cols,
00145                                       int *colors, int *colormodel);
00146 int pfi_write (FILE *stream, double *buf, int rows, int cols,
00147                int colors, int colormodel, char *fname);
00148 
00149 DLL_EXPORT int pfi_read_name (char *name, int rows, int cols, int colors, 
00150                               double *result);
00151 /*@=exportlocal@*/
00152   
00153 
00154 DLL_EXPORT int pfi_write_name (char *name, double *buf, int rows, 
00155                                int cols, int colors, int colormodel);
00156 DLL_EXPORT int pfi_properties_name (char *name, int *rows, int *cols, 
00157                                     int *colors, int *colormodel);
00158 #ifdef __cplusplus
00159 }
00160 #endif /* __cplusplus */
00161 #endif /* PFI_H__ */