/**************************************************************************** * apps/graphics/tiff/tiff_initialize.c * * Copyright (C) 2011 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include "tiff_internal.h" /**************************************************************************** * Pre-Processor Definitions ****************************************************************************/ /* Bi-level Images * * Offset Description Contents/Notes * Header: 0 Byte Order "II" or "MM" * 2 Magic Number 42 * 4 1st IFD offset 10 * 8 [2 bytes padding] * IFD: 10 Number of Directory Entries 13 * 12 NewSubfileType * 24 ImageWidth Number of columns is a user parameter * 36 ImageLength Number of rows is a user parameter * 48 Compression Hard-coded no compression (for now) * 60 PhotometricInterpretation Value is a user parameter * 72 StripOffsets Offset and count determined as strips added * 84 RowsPerStrip Value is a user parameter * 96 StripByteCounts Offset and count determined as strips added * 108 XResolution Value is a user parameter * 120 YResolution Value is a user parameter * 132 Resolution Unit Hard-coded to "inches" * 144 Software * 156 DateTime * 168 Next IFD offset 0 * 170 [2 bytes padding] * Values: * 172 XResolution Hard-coded to 300/1 * 180 YResolution Hard-coded to 300/1 * 188 "NuttX" Length = 6 (including NUL terminator) * 194 "YYYY:MM:DD HH:MM:SS" Length = 20 (ncluding NUL terminator) * 214 [2 bytes padding] * 216 StripByteCounts Beginning of strip byte counts * xxx StripOffsets Beginning of strip offsets * xxx [Probably padding] * xxx Data for strips Beginning of strip data */ #define TIFF_IFD_OFFSET (SIZEOF_TIFF_HEADER+2) #define TIFF_BILEV_NIFDENTRIES 13 #define TIFF_BILEV_STRIPIFDOFFS 72 #define TIFF_BILEV_STRIPBCIFDOFFS 96 #define TIFF_BILEV_VALOFFSET 172 #define TIFF_BILEV_XRESOFFSET 172 #define TIFF_BILEV_YRESOFFSET 180 #define TIFF_BILEV_SWOFFSET 188 #define TIFF_BILEV_DATEOFFSET 194 #define TIFF_BILEV_STRIPBCOFFSET 216 #define TIFF_SOFTWARE_STRING "NuttX" #define TIFF_SOFTWARE_STRLEN 6 #define TIFF_DATETIME_FORMAT "%Y:%m:%d %H:%M:%S" #define TIFF_DATETIME_STRLEN 20 /* Greyscale Images have one additional IFD entry: BitsPerSample (4 or 8) * * Header: 0 Byte Order "II" or "MM" * 2 Magic Number 42 * 4 1st IFD offset 10 * 8 [2 bytes padding] * IFD: 10 Number of Directory Entries 14 * 12 NewSubfileType * 24 ImageWidth Number of columns is a user parameter * 36 ImageLength Number of rows is a user parameter * 48 BitsPerSample * 60 Compression Hard-coded no compression (for now) * 72 PhotometricInterpretation Value is a user parameter * 84 StripOffsets Offset and count determined as strips added * 96 RowsPerStrip Value is a user parameter * 108 StripByteCounts Offset and count determined as strips added * 120 XResolution Value is a user parameter * 132 YResolution Value is a user parameter * 144 Resolution Unit Hard-coded to "inches" * 156 Software * 168 DateTime * 180 Next IFD offset 0 * 182 [2 bytes padding] * Values: * 184 XResolution Hard-coded to 300/1 * 192 YResolution Hard-coded to 300/1 * 200 "NuttX" Length = 6 (including NUL terminator) * 206 "YYYY:MM:DD HH:MM:SS" Length = 20 (ncluding NUL terminator) * 226 [2 bytes padding] * 228 StripByteCounts Beginning of strip byte counts * xxx StripOffsets Beginning of strip offsets * xxx [Probably padding] * xxx Data for strips Beginning of strip data */ #define TIFF_GREY_NIFDENTRIES 14 #define TIFF_GREY_STRIPIFDOFFS 84 #define TIFF_GREY_STRIPBCIFDOFFS 108 #define TIFF_GREY_VALOFFSET 184 #define TIFF_GREY_XRESOFFSET 184 #define TIFF_GREY_YRESOFFSET 192 #define TIFF_GREY_SWOFFSET 200 #define TIFF_GREY_DATEOFFSET 206 #define TIFF_GREY_STRIPBCOFFSET 228 /* RGB Images have two additional IFD entries: BitsPerSample (8,8,8) and * SamplesPerPixel (3): * * Header: 0 Byte Order "II" or "MM" * 2 Magic Number 42 * 4 1st IFD offset 10 * 8 [2 bytes padding] * IFD: 10 Number of Directory Entries 15 * 12 NewSubfileType * 24 ImageWidth Number of columns is a user parameter * 36 ImageLength Number of rows is a user parameter * 48 BitsPerSample 8, 8, 8 * 60 Compression Hard-coded no compression (for now) * 72 PhotometricInterpretation Value is a user parameter * 84 StripOffsets Offset and count determined as strips added * 96 SamplesPerPixel Hard-coded to 3 * 108 RowsPerStrip Value is a user parameter * 120 StripByteCounts Offset and count determined as strips added * 132 XResolution Value is a user parameter * 144 YResolution Value is a user parameter * 156 Resolution Unit Hard-coded to "inches" * 168 Software * 180 DateTime * 192 Next IFD offset 0 * 194 [2 bytes padding] * Values: * 196 XResolution Hard-coded to 300/1 * 204 YResolution Hard-coded to 300/1 * 212 BitsPerSample 8, 8, 8 * 218 [2 bytes padding] * 220 "NuttX" Length = 6 (including NUL terminator) * 226 "YYYY:MM:DD HH:MM:SS" Length = 20 (ncluding NUL terminator) * 246 [2 bytes padding] * 248 StripByteCounts Beginning of strip byte counts * xxx StripOffsets Beginning of strip offsets * xxx [Probably padding] * xxx Data for strips Beginning of strip data */ #define TIFF_RGB_NIFDENTRIES 15 #define TIFF_RGB_STRIPIFDOFFS 84 #define TIFF_RGB_STRIPBCIFDOFFS 120 #define TIFF_RGB_VALOFFSET 196 #define TIFF_RGB_XRESOFFSET 196 #define TIFF_RGB_YRESOFFSET 204 #define TIFF_RGB_BPSOFFSET 212 #define TIFF_RGB_SWOFFSET 220 #define TIFF_RGB_DATEOFFSET 226 #define TIFF_RGB_STRIPBCOFFSET 248 /* Debug *******************************************************************/ /* CONFIG_DEBUG_TIFFOFFSETS may be defined (along with CONFIG_DEBUG and * CONFIG_DEBUG_GRAPHICS) in order to verify the pre-determined TIFF file * offsets. */ #if !defined(CONFIG_DEBUG) || !defined(CONFIG_DEBUG_GRAPHICS) # undef CONFIG_DEBUG_TIFFOFFSETS #endif #ifdef CONFIG_DEBUG_TIFFOFFSETS # define tiff_offset(o,l) (o) += (l) # define tiff_checkoffs(o,x) ASSERT((o) == (x)) #else # define tiff_offset(o,l) # define tiff_checkoffs(o,x) #endif /**************************************************************************** * Private Types ****************************************************************************/ /**************************************************************************** * Private Data ****************************************************************************/ static const struct tiff_filefmt_s g_bilevinfo = { TIFF_BILEV_NIFDENTRIES, /* nifdentries, Number of IFD entries */ TIFF_BILEV_STRIPIFDOFFS, /* soifdoffset, Offset to StripOffset IFD entry */ TIFF_BILEV_STRIPBCIFDOFFS, /* sbcifdoffset, Offset to StripByteCount IFD entry */ TIFF_BILEV_VALOFFSET, /* valoffset, Offset to first values */ TIFF_BILEV_XRESOFFSET, /* xresoffset, Offset to XResolution values */ TIFF_BILEV_YRESOFFSET, /* yresoffset, Offset to yResolution values */ TIFF_BILEV_SWOFFSET, /* swoffset, Offset to Software string */ TIFF_BILEV_DATEOFFSET, /* dateoffset, Offset to DateTime string */ TIFF_BILEV_STRIPBCOFFSET /* sbcoffset, Offset to StripByteCount values */ }; static const struct tiff_filefmt_s g_greyinfo = { TIFF_GREY_NIFDENTRIES, /* nifdentries, Number of IFD entries */ TIFF_GREY_STRIPIFDOFFS, /* soifdoffset, Offset to StripOffset IFD entry */ TIFF_GREY_STRIPBCIFDOFFS, /* sbcifdoffset, Offset to StripByteCount IFD entry */ TIFF_GREY_VALOFFSET, /* valoffset, Offset to first values */ TIFF_GREY_XRESOFFSET, /* xresoffset, Offset to XResolution values */ TIFF_GREY_YRESOFFSET, /* yresoffset, Offset to yResolution values */ TIFF_GREY_SWOFFSET, /* swoffset, Offset to Software string */ TIFF_GREY_DATEOFFSET, /* dateoffset, Offset to DateTime string */ TIFF_GREY_STRIPBCOFFSET /* sbcoffset, Offset to StripByteCount values */ }; static const struct tiff_filefmt_s g_rgbinfo = { TIFF_RGB_NIFDENTRIES, /* nifdentries, Number of IFD entries */ TIFF_RGB_STRIPIFDOFFS, /* soifdoffset, Offset to StripOffset IFD entry */ TIFF_RGB_STRIPBCIFDOFFS, /* sbcifdoffset, Offset to StripByteCount IFD entry */ TIFF_RGB_VALOFFSET, /* valoffset, Offset to first values */ TIFF_RGB_XRESOFFSET, /* xresoffset, Offset to XResolution values */ TIFF_RGB_YRESOFFSET, /* yresoffset, Offset to yResolution values */ TIFF_RGB_SWOFFSET, /* swoffset, Offset to Software string */ TIFF_RGB_DATEOFFSET, /* dateoffset, Offset to DateTime string */ TIFF_RGB_STRIPBCOFFSET /* sbcoffset, Offset to StripByteCount values */ }; /**************************************************************************** * Public Data ****************************************************************************/ /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: tiff_putheader * * Description: * Setup to create a new TIFF file. * * Input Parameters: * info - A pointer to the caller allocated parameter passing/TIFF state * instance. * * Returned Value: * Zero (OK) on success. A negated errno value on failure. * ****************************************************************************/ static inline int tiff_putheader(FAR struct tiff_info_s *info) { struct tiff_header_s hdr; int ret; /* 0-1: Byte order */ #ifdef CONFIG_ENDIAN_BIG hdr.order[0] = 'M'; /* "MM"=big endian */ hdr.order[1] = 'M'; #else hdr.order[0] = 'I'; /* "II"=little endian */ hdr.order[1] = 'I'; #endif /* 2-3: 42 in appropriate byte order */ tiff_put16(hdr.magic, 42); /* 4-7: Offset to the first IFD */ tiff_put32(hdr.offset, TIFF_IFD_OFFSET); /* Write the header to the output file */ ret = tiff_write(info->outfd, &hdr, SIZEOF_TIFF_HEADER); if (ret != OK) { return ret; } /* Two pad bytes following the header */ ret = tiff_putint16(info->outfd, 0); return ret; } /**************************************************************************** * Name: tiff_putifdentry * * Description: * Write an IFD entry to outfile * * Input Parameters: * info - A pointer to the caller allocated parameter passing/TIFF state * instance. * tag - The value for the IFD tag field * type - The value for the IFD type field * count - The value for the IFD count field * offset - The value for the IFD offset field * * Returned Value: * Zero (OK) on success. A negated errno value on failure. * ****************************************************************************/ static int tiff_putifdentry(FAR struct tiff_info_s *info, uint16_t tag, uint16_t type, uint32_t count, uint32_t offset) { struct tiff_ifdentry_s ifd; tiff_put16(ifd.tag, tag); tiff_put16(ifd.type, type); tiff_put32(ifd.count, count); tiff_put32(ifd.offset, offset); return tiff_write(info->outfd, &ifd, SIZEOF_IFD_ENTRY); } /**************************************************************************** * Name: tiff_putifdentry * * Description: * Write an IFD with a 16-bit immediate value * * Input Parameters: * info - A pointer to the caller allocated parameter passing/TIFF state * instance. * tag - The value for the IFD tag field * type - The value for the IFD type field * count - The value for the IFD count field * value - The 16-bit immediate value * * Returned Value: * Zero (OK) on success. A negated errno value on failure. * ****************************************************************************/ static int tiff_putifdentry16(FAR struct tiff_info_s *info, uint16_t tag, uint16_t type, uint32_t count, uint16_t value) { union { uint8_t b[4]; uint32_t w; } u; u.w = 0; tiff_put16(u.b, value); return tiff_putifdentry(info, tag, type, count, u.w); } /**************************************************************************** * Name: tiff_datetime * * Description: * Get the DateTime string * * Input Parameters: * * * Returned Value: * Zero (OK) on success. A negated errno value on failure. * ****************************************************************************/ static int tiff_datetime(FAR char *timbuf, unsigned int buflen) { struct timespec ts; struct tm tm; int ret; /* Get the current time */ ret = clock_gettime(CLOCK_REALTIME, &ts); if (ret < 0) { gdbg("clock_gettime failed: %d\n", errno); return ERROR; } /* Break the current time up into the format needed by strftime */ (void)gmtime_r((FAR const time_t*)&ts.tv_sec, &tm); /* Comvert the current time in the TIFF format */ (void)strftime(timbuf, buflen, TIFF_DATETIME_FORMAT, &tm); return OK; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: tiff_initialize * * Description: * Setup to create a new TIFF file. * * Input Parameters: * info - A pointer to the caller allocated parameter passing/TIFF state instance. * * Returned Value: * Zero (OK) on success. A negated errno value on failure. * ****************************************************************************/ int tiff_initialize(FAR struct tiff_info_s *info) { uint16_t val16; #ifdef CONFIG_DEBUG_TIFFOFFSETS off_t offset = 0; #endif char timbuf[TIFF_DATETIME_STRLEN + 8]; int ret = -EINVAL; DEBUGASSERT(info && info->outfile && info->tmpfile1 && info->tmpfile2); /* Open all output files */ info->outfd = open(info->outfile, O_RDWR|O_CREAT|O_TRUNC, 0666); if (info->outfd < 0) { gdbg("Failed to open %s for reading/writing: %d\n", info->outfile, errno); goto errout; } info->tmp1fd = open(info->tmpfile1, O_RDWR|O_CREAT|O_TRUNC, 0666); if (info->tmp1fd < 0) { gdbg("Failed to open %s for reading/writing: %d\n", info->tmpfile1, errno); goto errout; } info->tmp2fd = open(info->tmpfile2, O_RDWR|O_CREAT|O_TRUNC, 0666); if (info->tmp2fd < 0) { gdbg("Failed to open %s for reading/writing: %d\n", info->tmpfile2, errno); goto errout; } /* Make some decisions using the color format. Only the following are * supported: */ info->pps = info->imgwidth * info->rps; /* Pixels per strip */ switch (info->colorfmt) { case FB_FMT_Y1: /* BPP=1, monochrome, 0=black */ info->filefmt = &g_bilevinfo; /* Bi-level file image file info */ info->imgflags = IMGFLAGS_FMT_Y1; /* Bit encoded image characteristics */ info->bps = (info->pps + 7) >> 3; /* Bytes per strip */ break; case FB_FMT_Y4: /* BPP=4, 4-bit greyscale, 0=black */ info->filefmt = &g_greyinfo; /* Greyscale file image file info */ info->imgflags = IMGFLAGS_FMT_Y4; /* Bit encoded image characteristics */ info->bps = (info->pps + 1) >> 1; /* Bytes per strip */ break; case FB_FMT_Y8: /* BPP=8, 8-bit greyscale, 0=black */ info->filefmt = &g_greyinfo; /* Greyscale file image file info */ info->imgflags = IMGFLAGS_FMT_Y8; /* Bit encoded image characteristics */ info->bps = info->pps; /* Bytes per strip */ break; case FB_FMT_RGB16_565: /* BPP=16 R=6, G=6, B=5 */ info->filefmt = &g_rgbinfo; /* RGB file image file info */ info->imgflags = IMGFLAGS_FMT_RGB16_565; /* Bit encoded image characteristics */ info->bps = 3 * info->pps; /* Bytes per strip */ break; case FB_FMT_RGB24: /* BPP=24 R=8, G=8, B=8 */ info->filefmt = &g_rgbinfo; /* RGB file image file info */ info->imgflags = IMGFLAGS_FMT_RGB24; /* Bit encoded image characteristics */ info->bps = 3 *info->pps; /* Bytes per strip */ break; default: gdbg("Unsupported color format: %d\n", info->colorfmt); return -EINVAL; } /* Write the TIFF header data to the outfile: * * Header: 0 Byte Order "II" or "MM" * 2 Magic Number 42 * 4 1st IFD offset 10 * 8 [2 bytes padding] */ ret = tiff_putheader(info); if (ret < 0) { goto errout; } tiff_offset(offset, TIFF_IFD_OFFSET); /* Write the Number of directory entries * * All formats: Offset 10 Number of Directory Entries 12 */ ret = tiff_putint16(info->outfd, info->filefmt->nifdentries); if (ret < 0) { goto errout; } tiff_offset(offset, 2); /* Write the NewSubfileType IFD entry * * All formats: Offset 12 NewSubfileType */ ret = tiff_putifdentry16(info, IFD_TAG_NEWSUBFILETYPE, IFD_FIELD_LONG, 1, 0); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); /* Write ImageWidth and ImageLength * * All formats: Offset 24 ImageWidth Number of columns is a user parameter * 36 ImageLength Number of rows is a user parameter */ ret = tiff_putifdentry16(info, IFD_TAG_IMAGEWIDTH, IFD_FIELD_SHORT, 1, info->imgwidth); if (ret == OK) { ret= tiff_putifdentry16(info, IFD_TAG_IMAGELENGTH, IFD_FIELD_SHORT, 1, info->imgheight); } if (ret < 0) { goto errout; } tiff_offset(offset, 2*SIZEOF_IFD_ENTRY); /* Write BitsPerSample * * Bi-level Images: None * Greyscale: Offset 48 BitsPerSample (4 or 8) * RGB: Offset 48 BitsPerSample (8,8,8) */ tiff_checkoffs(offset, 48); if (IMGFLAGS_ISGREY(info->imgflags)) { if (IMGFLAGS_ISGREY8(info->imgflags)) { val16 = 8; } else { val16 = 4; } ret = tiff_putifdentry16(info, IFD_TAG_BITSPERSAMPLE, IFD_FIELD_SHORT, 1, val16); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); } else if (IMGFLAGS_ISRGB(info->imgflags)) { ret = tiff_putifdentry(info, IFD_TAG_BITSPERSAMPLE, IFD_FIELD_SHORT, 3, TIFF_RGB_BPSOFFSET); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); } /* Write Compression: * * Bi-level Images: Offset 48 Hard-coded no compression (for now) * Greyscale: Offset 60 " " " " "" " " " " " " * RGB: Offset 60 " " " " "" " " " " " " */ ret = tiff_putifdentry16(info, IFD_TAG_COMPRESSION, IFD_FIELD_SHORT, 1, TAG_COMP_NONE); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); /* Write PhotometricInterpretation: * * Bi-level Images: Offset 48 Hard-coded BlackIsZero * Greyscale: Offset 72 Hard-coded BlackIsZero * RGB: Offset 72 Hard-coded RGB */ if (IMGFLAGS_ISRGB(info->imgflags)) { val16 = TAG_PMI_RGB; } else { val16 = TAG_PMI_BLACK; } ret = tiff_putifdentry16(info, IFD_TAG_PMI, IFD_FIELD_SHORT, 1, val16); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); /* Write StripOffsets: * * Bi-level Images: Offset 72 Value determined by switch statement above * Greyscale: Offset 84 Value determined by switch statement above * RGB: Offset 84 Value determined by switch statement above */ tiff_checkoffs(offset, info->filefmt->soifdoffset); ret = tiff_putifdentry(info, IFD_TAG_STRIPOFFSETS, IFD_FIELD_LONG, 0, 0); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); /* Write SamplesPerPixel * * Bi-level Images: N/A * Greyscale: N/A * RGB: Offset 96 Hard-coded to 3 */ if (IMGFLAGS_ISRGB(info->imgflags)) { ret = tiff_putifdentry16(info, IFD_TAG_SAMPLESPERPIXEL, IFD_FIELD_SHORT, 1, 3); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); } /* Write RowsPerStrip: * * Bi-level Images: Offset 84 Value is a user parameter * Greyscale: Offset 96 Value is a user parameter * RGB: Offset 108 Value is a user parameter */ ret = tiff_putifdentry16(info, IFD_TAG_ROWSPERSTRIP, IFD_FIELD_SHORT, 1, info->rps); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); /* Write StripByteCounts: * * Bi-level Images: Offset 96 Count determined as strips added, Value offset = 216 * Greyscale: Offset 108 Count determined as strips added, Value offset = 228 * RGB: Offset 120 Count determined as strips added, Value offset = 248 */ tiff_checkoffs(offset, info->filefmt->sbcifdoffset); ret = tiff_putifdentry(info, IFD_TAG_STRIPCOUNTS, IFD_FIELD_LONG, 0, info->filefmt->sbcoffset); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); /* Write XResolution and YResolution: * * Bi-level Images: Offset 108 and 120, Values are a user parameters * Greyscale: Offset 120 and 132, Values are a user parameters * RGB: Offset 132 and 144, Values are a user parameters */ ret = tiff_putifdentry(info, IFD_TAG_XRESOLUTION, IFD_FIELD_RATIONAL, 1, info->filefmt->xresoffset); if (ret == OK) { ret = tiff_putifdentry(info, IFD_TAG_YRESOLUTION, IFD_FIELD_RATIONAL, 1, info->filefmt->yresoffset); } if (ret < 0) { goto errout; } tiff_offset(offset, 2*SIZEOF_IFD_ENTRY); /* Write ResolutionUnit: * * Bi-level Images: Offset 132, Hard-coded to "inches" * Greyscale: Offset 144, Hard-coded to "inches" * RGB: Offset 156, Hard-coded to "inches" */ ret = tiff_putifdentry16(info, IFD_TAG_RESUNIT, IFD_FIELD_SHORT, 1, TAG_RESUNIT_INCH); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); /* Write Software: * * Bi-level Images: Offset 144 Count, Hard-coded "NuttX" * Greyscale: Offset 156 Count, Hard-coded "NuttX" * RGB: Offset 168 Count, Hard-coded "NuttX" */ ret = tiff_putifdentry(info, IFD_TAG_SOFTWARE, IFD_FIELD_ASCII, TIFF_SOFTWARE_STRLEN, info->filefmt->swoffset); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); /* Write DateTime: * * Bi-level Images: Offset 156 Count, Format "YYYY:MM:DD HH:MM:SS" * Greyscale: Offset 168 Count, Format "YYYY:MM:DD HH:MM:SS" * RGB: Offset 180 Count, Format "YYYY:MM:DD HH:MM:SS" */ ret = tiff_putifdentry(info, IFD_TAG_DATETIME, IFD_FIELD_ASCII, TIFF_DATETIME_STRLEN, info->filefmt->dateoffset); if (ret < 0) { goto errout; } tiff_offset(offset, SIZEOF_IFD_ENTRY); /* Write Next IFD Offset and 2 bytes of padding: * * Bi-level Images: Offset 168, Next IFD offset * Offset 170, [2 bytes padding] * Greyscale: Offset 180, Next IFD offset * Offset 182, [2 bytes padding] * RGB: Offset 192, Next IFD offset * Offset 194, [2 bytes padding] */ ret = tiff_putint32(info->outfd, 0); if (ret < 0) { goto errout; } tiff_offset(offset, 4); /* Now we begin the value section of the file */ tiff_checkoffs(offset, info->filefmt->valoffset); /* Write the XResolution and YResolution data: * * Bi-level Images: Offset 172 Count, Hard-coded to 300/1 * Offset 180 Count, Hard-coded to 300/1 * Greyscale: Offset 184 Count, Hard-coded to 300/1 * Offset 192 Count, Hard-coded to 300/1 * RGB: Offset 196 Count, Hard-coded to 300/1 * Offset 204 Count, Hard-coded to 300/1 */ tiff_checkoffs(offset, info->filefmt->xresoffset); ret = tiff_putint32(info->outfd, 300); if (ret == OK) { ret = tiff_putint32(info->outfd, 1); } if (ret < 0) { goto errout; } tiff_offset(offset, 8); tiff_checkoffs(offset, info->filefmt->yresoffset); ret = tiff_putint32(info->outfd, 300); if (ret == OK) { ret = tiff_putint32(info->outfd, 1); } if (ret < 0) { goto errout; } tiff_offset(offset, 8); /* Write RGB BitsPerSample Data: * * Bi-level Images: N/A * Greyscale: N/A * RGB: Offset 212 BitsPerSample (8,8,8) * Offset 218 [2 bytes padding] */ if (IMGFLAGS_ISRGB(info->imgflags)) { tiff_checkoffs(offset, TIFF_RGB_BPSOFFSET); tiff_putint16(info->outfd, 8); tiff_putint16(info->outfd, 8); tiff_putint16(info->outfd, 8); tiff_putint16(info->outfd, 0); tiff_offset(offset, 8); } /* Write the Software string: * * * Bi-level Images: Offset 188, Hard-coded "NuttX" * Greyscale: Offset 200, Hard-coded "NuttX" * RGB: Offset 220, Hard-coded "NuttX" */ tiff_checkoffs(offset, info->filefmt->swoffset); ret = tiff_putstring(info->outfd, TIFF_SOFTWARE_STRING, TIFF_SOFTWARE_STRLEN); if (ret < 0) { goto errout; } tiff_offset(offset, TIFF_SOFTWARE_STRLEN); /* Write the DateTime string: * * * Bi-level Images: Offset 188, Format "YYYY:MM:DD HH:MM:SSS" * Greyscale: Offset 200, Hard-coded "NuttX" * RGB: Offset 220, Hard-coded "NuttX" */ tiff_checkoffs(offset, info->filefmt->dateoffset); ret = tiff_datetime(timbuf, TIFF_DATETIME_STRLEN + 8); if (ret < 0) { goto errout; } ret = tiff_putstring(info->outfd, timbuf, TIFF_DATETIME_STRLEN); if (ret < 0) { goto errout; } tiff_offset(offset, TIFF_DATETIME_STRLEN); /* Add two bytes of padding */ ret = tiff_putint16(info->outfd, 0); if (ret < 0) { goto errout; } tiff_offset(offset, 2); /* And that should do it! */ tiff_checkoffs(offset, info->filefmt->sbcoffset); info->outsize = info->filefmt->sbcoffset; return OK; errout: tiff_abort(info); return ret; }