pax_global_header00006660000000000000000000000064117406122730014515gustar00rootroot0000000000000052 comment=4c5dde4f812c284fb4278c988c5bc5ad478d0fb0 ruby-exif-0.1.2/000077500000000000000000000000001174061227300134275ustar00rootroot00000000000000ruby-exif-0.1.2/COPYING000066400000000000000000000634761174061227300145020ustar00rootroot00000000000000 GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999 Copyright (C) 1991, 1999 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. [This is the first released version of the Lesser GPL. It also counts as the successor of the GNU Library Public License, version 2, hence the version number 2.1.] Preamble The licenses for most software are designed to take away your freedom to share and change it. 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Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the library `Frob' (a library for tweaking knobs) written by James Random Hacker. , 1 April 1990 Ty Coon, President of Vice That's all there is to it! ruby-exif-0.1.2/ChangeLog000066400000000000000000000006751174061227300152110ustar00rootroot00000000000000Wed Dec 11 20:21:22 2002 Ryuichi Tamura * exif.c (rb_exif_get_tag) : now need not pass hexadecimal number as string object. pass it as it is. * exif.c (rb_exif_get_tag) : search only for tags available in libexif to improve search performance. * Version 0.1.2 Mon Nov 11 22:48:17 2002 Ryuichi Tamura * exif.c (rb_exif_get_tag) : return nil if return value is empty. * Version 0.1.1. ruby-exif-0.1.2/README000066400000000000000000000012651174061227300143130ustar00rootroot00000000000000= ruby-libexif - an interface to libexif library libexif is a library for parsing, editing, and saving EXIF data. You can retrieve useful information from EXIF tags contained in images created by recording equipments(for example, digital camera). For more information, please refer (()) == Requirements * ruby-1.6 or heigher * libexif-0.5.6 (or heigher) == Install $ ruby extconf.rb $ su # make site-install == Author Copyright (C) 2002 Ryuichi Tamura (r-tam@fsinet.or.jp) See 'COPYING' file for license information. == Homepage (()) == Bugs methods to edit the value of EXIF tag is not yet implemented. ruby-exif-0.1.2/exif.c000066400000000000000000000446751174061227300145460ustar00rootroot00000000000000/****************************************************************************** vim:sts=4:ts=4:sw=4 exif.c - ruby interface to libexif library Copyright (C) 2002 Ryuichi Tamura (r-tam@fsinet.or.jp) *******************************************************************************/ #include "ruby.h" #include #include #include #include #include #define Get_Exif(obj, exif) { \ Data_Get_Struct((obj), Exif, (exif)); \ if (!(exif)->ed) \ rb_raise(eExifError, "should set data first"); \ } typedef struct _Exif Exif; struct _Exif { ExifData *ed; int ifd; }; #define IFD_RB_DEFAULT (EXIF_IFD_0 - 1) static VALUE cExif, mExifByteOrder, mExifIfd; static VALUE eExifError, eExifInvalidFormat; static VALUE eExifInvalidIFD, eExifTagNotFound, eExifThumbnailNotFound; static void rb_exif_free(Exif *exif) { if (exif){ exif_data_free(exif->ed); exif->ed = NULL; free(exif); } } static VALUE rb_exif_s_new(int argc, VALUE *argv, VALUE klass) { VALUE obj; Exif *exif; exif = ALLOC(Exif); exif->ed = NULL; exif->ifd = IFD_RB_DEFAULT; obj = Data_Wrap_Struct(klass, 0, rb_exif_free, exif); rb_obj_call_init(obj, argc, argv); return obj; } static ExifData * rb_exif_data_new_from_file(VALUE fpath) { ExifData *data; Check_Type(fpath, T_STRING); data = exif_data_new_from_file(RSTRING(fpath)->ptr); if (!data){ FILE *f; f = fopen(RSTRING(fpath)->ptr,"rb"); if (!f) rb_raise(rb_eArgError, "unable to open file - '%s'", RSTRING(fpath)->ptr); fclose(f); rb_raise(eExifInvalidFormat, "'%s' does not contain EXIF data", RSTRING(fpath)->ptr); } return data; } static VALUE rb_exif_initialize(int argc, VALUE *argv, VALUE obj) { VALUE fpath; Exif *exif; Data_Get_Struct(obj, Exif, exif); if (rb_scan_args(argc, argv, "01", &fpath) == 1) { exif->ed = rb_exif_data_new_from_file(fpath); } else { exif->ed = exif_data_new(); } return Qnil; } static void rb_exif_data_new_from_data(ExifData *ed, VALUE str) { Check_Type(str, T_STRING); if (ed){ exif_data_free(ed); ed = NULL; } ed = exif_data_new_from_data((unsigned char *)RSTRING(str)->ptr, RSTRING(str)->len); } static VALUE rb_exif_set_data(VALUE obj, VALUE str) { Exif *exif; Data_Get_Struct(obj, Exif, exif); rb_exif_data_new_from_data(exif->ed, str); return obj; } static VALUE rb_exif_get_byte_order(VALUE obj) { Exif *exif; Get_Exif(obj, exif); return FIX2INT(exif_data_get_byte_order(exif->ed)); } static VALUE rb_exif_set_byte_order(VALUE obj, VALUE byteorder) { Exif *exif; Get_Exif(obj, exif); exif_data_set_byte_order(exif->ed, FIX2INT(byteorder)); return obj; } static void rb_exif_yield_tag_value(ExifEntry *entry, void *data) { VALUE k, v; char buf[7]; unsigned char *ids = data; memset(buf, 0, sizeof(buf)); sprintf(buf, "0x%04x", entry->tag); k = *ids ? rb_str_new2(buf) : rb_str_new2(exif_tag_get_title(entry->tag)); v = rb_str_new2(exif_entry_get_value(entry)); rb_yield(rb_assoc_new(k, v)); } static void rb_exif_data_foreach_content_func(ExifContent *content, void *data) { exif_content_foreach_entry(content, rb_exif_yield_tag_value, data); } static VALUE rb_exif_each(int argc, VALUE *argv, VALUE obj) { Exif *exif; VALUE use_tag_id; unsigned char ids = 0; if (rb_scan_args(argc, argv, "01", &use_tag_id) == 1){ ids = FIX2UINT(use_tag_id); } Get_Exif(obj, exif); exif_data_foreach_content(exif->ed, rb_exif_data_foreach_content_func, &ids); return obj; } static ExifIfd exif_ifd_from_string (const char *); static VALUE rb_exif_set_ifd(VALUE obj, VALUE ifd) { Exif *exif; int i; Get_Exif(obj, exif); switch(TYPE(ifd)){ case T_FIXNUM: i = FIX2INT(ifd); if (i < IFD_RB_DEFAULT || i > EXIF_IFD_INTEROPERABILITY){ rb_raise(rb_eRuntimeError, "wrong constant"); } break; case T_STRING: i = exif_ifd_from_string(RSTRING(ifd)->ptr); if (i == -1){ rb_raise(rb_eRuntimeError, "unknown IFD: '%s'", RSTRING(ifd)->ptr); } break; default: rb_raise(rb_eTypeError, "wrong type of an argument"); break; } exif->ifd = i; return obj; } static VALUE rb_exif_get_ifd(VALUE obj) { Exif *exif; const char *name; Get_Exif(obj, exif); name = exif_ifd_get_name(exif->ifd); if (!name) return Qnil; return rb_str_new2(name); } static ExifTag exif_tag_from_string (const char *); static ExifTag exif_tag_from_tagid (ExifTag); static VALUE rb_exif_get_tag(VALUE obj, VALUE tagid) { Exif *exif; ExifTag tag; ExifEntry *e; const char *found; int i; Get_Exif(obj, exif); switch (TYPE(tagid)) { case T_STRING: tag = exif_tag_from_string(RSTRING(tagid)->ptr); if (!tag){ rb_raise(eExifError, "invalid tag: '%s'", RSTRING(tagid)->ptr); } break; case T_FIXNUM: tag = exif_tag_from_tagid(FIX2INT(tagid)); if (!tag){ rb_raise(eExifError, "invalid tag: 0x%04x", tagid); } break; default: rb_raise(rb_eTypeError, "wrong type of arguments"); break; } if (exif->ifd >= 0){ e = exif_content_get_entry(exif->ed->ifd[exif->ifd], tag); if (!e){ rb_raise(eExifTagNotFound, "IFD '%s' does not contain tag '%s'(0x%04x)", exif_ifd_get_name(exif->ifd), exif_tag_get_title(tag), tag); } return rb_str_new2(exif_entry_get_value(e)); } for (i = 0; i < EXIF_IFD_COUNT; i++){ e = exif_content_get_entry(exif->ed->ifd[i], tag); if (e) break; } found = exif_entry_get_value(e); return found ? rb_str_new2(found) : Qnil; } static void rb_exif_set_tag_0(ExifData *ed, ExifEntry *e, VALUE val) { ExifByteOrder o; o = exif_data_get_byte_order(ed); /* exif_entry_dump(e, 1); */ } static VALUE rb_exif_set_tag(VALUE obj, VALUE tagid, VALUE val) { Exif *exif; ExifTag tag; ExifEntry *e; rb_raise(rb_eNotImpError, "soryy, not yet implemented"); Check_Type(tagid, T_STRING); Check_Type(val, T_STRING); Get_Exif(obj, exif); tag = exif_tag_from_string(RSTRING(tagid)->ptr); if (!tag || !exif_tag_get_name(tag)){ rb_raise(eExifError, "invalid tag: '%s'", RSTRING(tagid)->ptr); } e = exif_content_get_entry(exif->ed->ifd[exif->ifd], tag); if (!e){ e = exif_entry_new(); exif_content_add_entry(exif->ed->ifd[exif->ifd], e); exif_entry_initialize(e, tag); } rb_exif_set_tag_0(exif->ed, e, val); return obj; } static VALUE rb_exif_list_tags_at_ifd(VALUE obj, VALUE ifd) { Exif *exif; unsigned int tag; int i; const char *name; char buf[7]; VALUE ret = rb_ary_new(); i = FIX2INT(ifd); if (i < EXIF_IFD_0 || i > EXIF_IFD_INTEROPERABILITY){ rb_raise(rb_eRuntimeError, "wrong constant"); } Get_Exif(obj, exif); for (tag = 0; tag < 0xffff; tag++) { name = exif_tag_get_title(tag); if (!name) continue; if (exif_content_get_entry(exif->ed->ifd[i], tag)){ memset(buf, 0, sizeof(buf)); sprintf(buf, "0x%04x", tag); rb_ary_push(ret, rb_assoc_new(rb_str_new2(name), rb_str_new2(buf))); } } return ret; } static VALUE rb_exif_s_get_tag_description(VALUE klass, VALUE tagid) { ExifTag tag; VALUE cdr; char buf[7]; switch (TYPE(tagid)){ case T_FIXNUM: tag = FIX2INT(tagid); if (!exif_tag_get_name(tag)) rb_raise(eExifError, "invalid tag id: 0x%04x(%d)", FIX2INT(tagid), FIX2INT(tagid)); break; case T_STRING: tag = exif_tag_from_string(RSTRING(tagid)->ptr); if (!tag || !exif_tag_get_name(tag)) { rb_raise(eExifError, "invalid tag: '%s'", RSTRING(tagid)->ptr); } break; default: rb_raise(rb_eTypeError, "wrong type of an argument"); break; } memset(buf, 0, sizeof(buf)); sprintf(buf, "0x%04x", tag); cdr = rb_ary_new(); rb_ary_push(cdr, rb_str_new2(exif_tag_get_name(tag))); rb_ary_push(cdr, rb_str_new2(exif_tag_get_description(tag))); rb_ary_push(cdr, rb_str_new2(buf)); return rb_assoc_new(rb_str_new2(exif_tag_get_title(tag)), cdr); } static VALUE rb_exif_extract_thumbnail(VALUE obj, VALUE dest) { Exif *exif; Get_Exif(obj, exif); if (!exif->ed->data) rb_raise(eExifThumbnailNotFound, "thumbnail not found"); rb_funcall(dest, rb_intern("<<"), 1, rb_str_new(exif->ed->data, exif->ed->size)); return obj; } static VALUE rb_exif_set_thumbnail(VALUE obj, VALUE src) { Exif *exif; Get_Exif(obj, exif); if (exif->ed->data){ free(exif->ed->data); exif->ed->data = NULL; exif->ed->size = 0; } Check_Type(src, T_STRING); exif->ed->size = RSTRING(src)->len; exif->ed->data = xmalloc(sizeof(char)*exif->ed->size); MEMMOVE(exif->ed->data, RSTRING(src)->ptr, char, exif->ed->size); return obj; } #define N_(val) val static struct { ExifTag tag; const char *name; const char *title; } ExifTagTable[] = { {EXIF_TAG_INTEROPERABILITY_INDEX, "InteroperabilityIndex", "InteroperabilityIndex"}, {EXIF_TAG_INTEROPERABILITY_VERSION, "InteroperabilityVersion", "InteroperabilityVersion"}, {EXIF_TAG_IMAGE_WIDTH, "ImageWidth", N_("Image Width")}, {EXIF_TAG_IMAGE_LENGTH, "ImageLength", N_("Image Length")}, {EXIF_TAG_BITS_PER_SAMPLE, "BitsPerSample", N_("Bits per Sample")}, {EXIF_TAG_COMPRESSION, "Compression", N_("Compression")}, {EXIF_TAG_PHOTOMETRIC_INTERPRETATION, "PhotometricInterpretation", N_("Photometric Interpretation")}, {EXIF_TAG_FILL_ORDER, "FillOrder", N_("Fill Order")}, {EXIF_TAG_DOCUMENT_NAME, "DocumentName", N_("Document Name")}, {EXIF_TAG_IMAGE_DESCRIPTION, "ImageDescription", N_("Image Description")}, {EXIF_TAG_MAKE, "Make", N_("Manufacturer")}, {EXIF_TAG_MODEL, "Model", N_("Model")}, {EXIF_TAG_STRIP_OFFSETS, "StripOffsets", N_("Strip Offsets")}, {EXIF_TAG_ORIENTATION, "Orientation", N_("Orientation")}, {EXIF_TAG_SAMPLES_PER_PIXEL, "SamplesPerPixel", N_("Samples per Pixel")}, {EXIF_TAG_ROWS_PER_STRIP, "RowsPerStrip", N_("Rows per Strip")}, {EXIF_TAG_STRIP_BYTE_COUNTS, "StripByteCounts", N_("Strip Byte Count")}, {EXIF_TAG_X_RESOLUTION, "XResolution", N_("x-Resolution")}, {EXIF_TAG_Y_RESOLUTION, "YResolution", N_("y-Resolution")}, {EXIF_TAG_PLANAR_CONFIGURATION, "PlanarConfiguration", N_("Planar Configuration")}, {EXIF_TAG_RESOLUTION_UNIT, "ResolutionUnit", N_("Resolution Unit")}, {EXIF_TAG_TRANSFER_FUNCTION, "TransferFunction", N_("Transfer Function")}, {EXIF_TAG_SOFTWARE, "Software", N_("Software")}, {EXIF_TAG_DATE_TIME, "DateTime", N_("Date and Time")}, {EXIF_TAG_ARTIST, "Artist", N_("Artist")}, {EXIF_TAG_WHITE_POINT, "WhitePoint", N_("White Point")}, {EXIF_TAG_PRIMARY_CHROMATICITIES, "PrimaryChromaticities", N_("Primary Chromaticities")}, {EXIF_TAG_TRANSFER_RANGE, "TransferRange", N_("Transfer Range")}, {EXIF_TAG_JPEG_PROC, "JPEGProc", "JPEGProc"}, {EXIF_TAG_JPEG_INTERCHANGE_FORMAT, "JPEGInterchangeFormat", N_("JPEG Interchange Format")}, {EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH, "JPEGInterchangeFormatLength", N_("JPEG Interchange Format Length")}, {EXIF_TAG_YCBCR_COEFFICIENTS, "YCbCrCoefficients", N_("YCbCr Coefficients")}, {EXIF_TAG_YCBCR_SUB_SAMPLING, "YCbCrSubSampling", N_("YCbCr Sub-Sampling")}, {EXIF_TAG_YCBCR_POSITIONING, "YCbCrPositioning", N_("YCbCr Positioning")}, {EXIF_TAG_REFERENCE_BLACK_WHITE, "ReferenceBlackWhite", N_("Reference Black/White")}, {EXIF_TAG_RELATED_IMAGE_FILE_FORMAT, "RelatedImageFileFormat", "RelatedImageFileFormat"}, {EXIF_TAG_RELATED_IMAGE_WIDTH, "RelatedImageWidth", "RelatedImageWidth"}, {EXIF_TAG_RELATED_IMAGE_LENGTH, "RelatedImageLength", "RelatedImageLength"}, {EXIF_TAG_CFA_REPEAT_PATTERN_DIM, "CFARepeatPatternDim", "CFARepeatPatternDim"}, {EXIF_TAG_CFA_PATTERN, "CFAPattern", N_("CFA Pattern")}, {EXIF_TAG_BATTERY_LEVEL, "BatteryLevel", N_("Battery Level")}, {EXIF_TAG_COPYRIGHT, "Copyright", N_("Copyright")}, {EXIF_TAG_EXPOSURE_TIME, "ExposureTime", N_("Exposure Time")}, {EXIF_TAG_FNUMBER, "FNumber", "FNumber"}, {EXIF_TAG_IPTC_NAA, "IPTC/NAA", "IPTC/NAA"}, {EXIF_TAG_EXIF_IFD_POINTER, "ExifIFDPointer", "ExifIFDPointer"}, {EXIF_TAG_INTER_COLOR_PROFILE, "InterColorProfile", "InterColorProfile"}, {EXIF_TAG_EXPOSURE_PROGRAM, "ExposureProgram", "ExposureProgram"}, {EXIF_TAG_SPECTRAL_SENSITIVITY, "SpectralSensitivity", N_("Spectral Sensitivity")}, {EXIF_TAG_GPS_INFO_IFD_POINTER, "GPSInfoIFDPointer", "GPSInfoIFDPointer"}, #if 0 /* GPS tags are not supported in this library */ #endif {EXIF_TAG_ISO_SPEED_RATINGS, "ISOSpeedRatings", N_("ISO Speed Ratings")}, {EXIF_TAG_OECF, "OECF", "OECF"}, {EXIF_TAG_EXIF_VERSION, "ExifVersion", N_("Exif Version")}, {EXIF_TAG_DATE_TIME_ORIGINAL, "DateTimeOriginal", N_("Date and Time (original)")}, {EXIF_TAG_DATE_TIME_DIGITIZED, "DateTimeDigitized", N_("Date and Time (digitized)")}, {EXIF_TAG_COMPONENTS_CONFIGURATION, "ComponentsConfiguration", "ComponentsConfiguration"}, {EXIF_TAG_COMPRESSED_BITS_PER_PIXEL, "CompressedBitsPerPixel", N_("Compressed Bits per Pixel")}, {EXIF_TAG_SHUTTER_SPEED_VALUE, "ShutterSpeedValue", N_("Shutter speed")}, {EXIF_TAG_APERTURE_VALUE, "ApertureValue", N_("Aperture")}, {EXIF_TAG_BRIGHTNESS_VALUE, "BrightnessValue", N_("Brightness")}, {EXIF_TAG_EXPOSURE_BIAS_VALUE, "ExposureBiasValue", N_("Exposure Bias")}, {EXIF_TAG_MAX_APERTURE_VALUE, "MaxApertureValue", "MaxApertureValue"}, {EXIF_TAG_SUBJECT_DISTANCE, "SubjectDistance", N_("Subject Distance")}, {EXIF_TAG_METERING_MODE, "MeteringMode", N_("Metering Mode")}, {EXIF_TAG_LIGHT_SOURCE, "LightSource", N_("Light Source")}, {EXIF_TAG_FLASH, "Flash", N_("Flash")}, {EXIF_TAG_FOCAL_LENGTH, "FocalLength", N_("Focal Length")}, {EXIF_TAG_MAKER_NOTE, "MakerNote", N_("Maker Note")}, {EXIF_TAG_USER_COMMENT, "UserComment", N_("User Comment")}, {EXIF_TAG_SUBSEC_TIME, "SubsecTime", "SubsecTime"}, {EXIF_TAG_SUB_SEC_TIME_ORIGINAL, "SubSecTimeOriginal", "SubSecTimeOriginal"}, {EXIF_TAG_SUB_SEC_TIME_DIGITIZED, "SubSecTimeDigitized", "SubSecTimeDigitized"}, {EXIF_TAG_FLASH_PIX_VERSION, "FlashPixVersion", "FlashPixVersion"}, {EXIF_TAG_COLOR_SPACE, "ColorSpace", N_("Color Space")}, {EXIF_TAG_PIXEL_X_DIMENSION, "PixelXDimension", "PixelXDimension"}, {EXIF_TAG_PIXEL_Y_DIMENSION, "PixelYDimension", "PixelYDimension"}, {EXIF_TAG_RELATED_SOUND_FILE, "RelatedSoundFile", "RelatedSoundFile"}, {EXIF_TAG_INTEROPERABILITY_IFD_POINTER, "InteroperabilityIFDPointer", "InteroperabilityIFDPointer"}, {EXIF_TAG_FLASH_ENERGY, "FlashEnergy", N_("Flash Energy")}, {EXIF_TAG_SPATIAL_FREQUENCY_RESPONSE, "SpatialFrequencyResponse", N_("Spatial Frequency Response")}, {EXIF_TAG_FOCAL_PLANE_X_RESOLUTION, "FocalPlaneXResolution", N_("Focal Plane x-Resolution")}, {EXIF_TAG_FOCAL_PLANE_Y_RESOLUTION, "FocalPlaneYResolution", N_("Focal Plane y-Resolution")}, {EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT, "FocalPlaneResolutionUnit", N_("Focal Plane Resolution Unit")}, {EXIF_TAG_SUBJECT_LOCATION, "SubjectLocation", N_("Subject Location")}, {EXIF_TAG_EXPOSURE_INDEX, "ExposureIndex", N_("Exposure index")}, {EXIF_TAG_SENSING_METHOD, "SensingMethod", N_("Sensing Method")}, {EXIF_TAG_FILE_SOURCE, "FileSource", N_("File Source")}, {EXIF_TAG_SCENE_TYPE, "SceneType", N_("Scene Type")}, {EXIF_TAG_NEW_CFA_PATTERN, "CFAPattern", N_("CFA Pattern")}, {EXIF_TAG_SUBJECT_AREA, "SubjectArea", N_("Subject Area")}, {EXIF_TAG_CUSTOM_RENDERED, "CustomRendered", N_("Custom Rendered")}, {EXIF_TAG_EXPOSURE_MODE, "ExposureMode", N_("Exposure Mode")}, {EXIF_TAG_WHITE_BALANCE, "WhiteBalance", N_("White Balance")}, {EXIF_TAG_DIGITAL_ZOOM_RATIO, "DigitalZoomRatio", N_("Digital Zoom Ratio")}, {EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM, "FocalLengthIn35mmFilm", N_("Focal Length In 35mm Film")}, {EXIF_TAG_SCENE_CAPTURE_TYPE, "SceneCaptureType", N_("Scene Capture Type")}, {EXIF_TAG_GAIN_CONTROL, "GainControl", N_("Gain Control")}, {EXIF_TAG_CONTRAST, "Contrast", N_("Contrast")}, {EXIF_TAG_SATURATION, "Saturation", N_("Saturation")}, {EXIF_TAG_SHARPNESS, "Sharpness", N_("Sharpness")}, {EXIF_TAG_DEVICE_SETTING_DESCRIPTION, "DeviceSettingDescription", N_("Device Setting Description")}, {EXIF_TAG_SUBJECT_DISTANCE_RANGE, "SubjectDistanceRange", N_("Subject Distance Range")}, {EXIF_TAG_IMAGE_UNIQUE_ID, "ImageUniqueID", N_("Image Unique ID")}, {0, NULL, NULL} }; static ExifTag exif_tag_from_string (const char *str) { int i; if (!str) return 0; /* Is the string a tag's name or title? */ for (i = 0; ExifTagTable[i].name != NULL; i++) { if (!strcmp (str, ExifTagTable[i].name)) return (ExifTagTable[i].tag); if (!strcmp (str, ExifTagTable[i].title)) return (ExifTagTable[i].tag); } return 0; } static ExifTag exif_tag_from_tagid(ExifTag tag) { int i; for (i = 0; ExifTagTable[i].tag != 0; i++) { if (ExifTagTable[i].tag == tag) return tag; } return 0; } static ExifIfd exif_ifd_from_string (const char *string) { unsigned int i; if (!string) return (-1); for (i = 0; i < EXIF_IFD_COUNT; i++) { if (!strcmp (string, exif_ifd_get_name (i))) return (i); } return (-1); } void Init_exif(void) { cExif = rb_define_class("Exif", rb_cObject); eExifError = rb_define_class_under(cExif, "Error", rb_eRuntimeError); eExifInvalidFormat = rb_define_class_under(cExif, "NotExifFormat", eExifError); eExifInvalidIFD = rb_define_class_under(eExifError, "InvalidIFD", eExifError); eExifTagNotFound = rb_define_class_under(eExifError, "TagNotFound", eExifError); eExifThumbnailNotFound = rb_define_class_under(eExifError, "ThumbnailNotFound", eExifError); rb_define_singleton_method(cExif, "new", rb_exif_s_new, -1); rb_define_private_method(cExif, "initialize", rb_exif_initialize, -1); rb_define_method(cExif, "data=", rb_exif_set_data, 1); rb_define_alias(cExif, "<<", "data="); rb_define_method(cExif, "each_entry", rb_exif_each, -1); rb_define_method(cExif, "byte_order", rb_exif_get_byte_order, 0); rb_define_method(cExif, "byte_order=", rb_exif_set_byte_order, 1); rb_define_method(cExif, "ifd=", rb_exif_set_ifd, 1); rb_define_method(cExif, "ifd", rb_exif_get_ifd, 0); rb_define_method(cExif, "[]", rb_exif_get_tag, 1); rb_define_method(cExif, "[]=", rb_exif_set_tag, 2); rb_define_singleton_method(cExif, "[]", rb_exif_s_get_tag_description, 1); rb_define_method(cExif, "list_tags", rb_exif_list_tags_at_ifd, 1); rb_define_method(cExif, "extract_thumbnail", rb_exif_extract_thumbnail, 1); rb_define_alias(cExif, "thumbnail", "extract_thumbnail"); rb_define_method(cExif, "thumbnail=", rb_exif_set_thumbnail, 1); mExifByteOrder = rb_define_module_under(cExif, "ByteOrder"); rb_define_const(mExifByteOrder, "MOTOROLA", INT2FIX(EXIF_BYTE_ORDER_MOTOROLA)); rb_define_const(mExifByteOrder, "INTEL", INT2FIX(EXIF_BYTE_ORDER_INTEL)); mExifIfd = rb_define_module_under(cExif, "IFD"); rb_define_const(mExifIfd, "Zero", INT2FIX(EXIF_IFD_0)); rb_define_const(mExifIfd, "One", INT2FIX(EXIF_IFD_1)); rb_define_const(mExifIfd, "EXIF", INT2FIX(EXIF_IFD_EXIF)); rb_define_const(mExifIfd, "GPS", INT2FIX(EXIF_IFD_GPS)); rb_define_const(mExifIfd, "Interoperability", INT2FIX(EXIF_IFD_INTEROPERABILITY)); rb_define_const(mExifIfd, "Any", INT2FIX(IFD_RB_DEFAULT)); } ruby-exif-0.1.2/exif.rd.en000066400000000000000000000106511174061227300153150ustar00rootroot00000000000000=begin = ruby-libexif - an interface to libexif library (()) is the library for parsing image information contained in EXIF format images. ruby-libexif provides a simple interface to this library. = Usage require 'exif' # # generate Exif object from 'image.jpg' in the current directory. # exif = Exif.new('image.jpg') # # generate an empty Exif object, and load the image data into it. # exif = Exif.new File.open('image.jpg') { |f| exif << f.read } # # To access the value of the tag, use Exif#[]. # The return value are string object. # You can specify a tag by its name or title, or ID. # For example, if you want to know the manufacturer of # the recording equipment that generated the image, # you can get the information by specifying the tag as follows: # # * exif['Manufacturer'] ; "tag title" # * exif['Make'] ; "tag name" # * exif[0x010f] ; "tag ID" # (Please refer (()) , (()) for more details, and (()) for available tags in the IFD.) # get a value of the specifid tag by its title p exif["Manufacturer"] # -> "FUJIFILM" # get a value of the specified tag by its tag ID (string) p exif[0xa001] # -> "FUJIFILM" # # If the image has thumbnail, you can extract it by # Exif#extract_thumbnail, or Exif#thumbnail # # extract a thumbnail, and save it to a file. File.open('thumb.jpg', 'wb') {|dest| exif.thumbnail(dest)} # set a new thumbnail to Exif object. note that existing # thumbnail, if exists, will be destroyed. File.open('src.jpg', 'rb'){|src| exif.thumbnail = src.read } = Reference == class Exif === class methods --- Exif.new generate a new Exif object with empty data. --- Exif.new(fpath) load the image data from (({fpath})), and generates a new Exif object. If the image is not EXIF-formatted, exception (()) raises. --- Exif.[](tagid) get a description of ((|tagid|)). the returned value is an array object: ['tag title', ['tag name', 'description of the tag', 'tag ID']] === instance methods --- Exif#data=(str) --- Exif#<<(str) set the image data given as String object. The existing data in the object, if exists, will be destroyed. --- Exif#list_tags(ifd) return an array consists of tags defiend in IFD ((|ifd|)). each elements is following array object: ["tag title", "tag ID('0xdddd')"] ((|ifd|)) is one of the constants defined in (()). --- Exif#byte_order --- Exif#ifd return a string that represents current IFD. --- Exif#ifd=(ifd) set IFD of the object to ((|ifd|)). ((|ifd|)) is one of the constants defined in (()), or either one of "0", "1", "GPS", "Interoperability". If invalid IFD is given, exception (()) raises. --- Exif#[](tag) return the value (string) of the (({tag})). If the tag is not supported by current IFD, exception (()) raises. Unless you have set IFD by (()), this method tries to find the tag and its value over available IFDs. --- Exif#each_entry(use_tag_id=false) {|tag, val| ...} executes the block, with the block arguments being tag title ((|tag|)) over the LFDs and its value ((|val|)). If ((|use_tag_id|)) is ((|true|)), ((|tag|)) is set to tag ID (denoted by '0xdddd'). --- Exif#extract_thumbnail(dest) --- Exif#thumbnail(dest) write the thumbnail of the image to ((|dest|)), using (({dest#<<})). If the image does not have thumbnail, exception (()) raises. == modules == Exif::IFD IFDs defined in libexif. --- Exif::IFD::Zero --- Exif::IFD::One --- Exif::IFD::EXIF --- Exif::IFD::GPS --- Exif::IFD::Interoperability --- Exif::IFD::Any This constant should be set in (()) if (()) searches tag over above five IFDs. Exif object is set to this value by default. == Exif::ByteOrder constants that represents byte order of the EXIF image. --- Exif::ByteOrder::INTEL --- Exif::ByteOrder::MOTOROLA == Exception classes RuntimeError --- Exif::Error -+- Exif::Error::NotExifFormat |- Exif::Error::InvalidIFD |- Exif::Error::ThumbnailNotFound `- Exif::Error::TagNotFound --- Exif::Error Runtime errors occurred by using ruby-libexif belong to this class, or following derived classes. --- Exif::Error::NotExifFormat --- Exif::Error::InvalidIFD --- Exif::Error::TagNotFound --- Exif::Error::ThumbnailNotFound =end ruby-exif-0.1.2/exif.rd.ja000066400000000000000000000111161174061227300153020ustar00rootroot00000000000000=begin = ruby-libexif - libexif を ruby から使うためのライブラリ。 libexifはEXIFフォーマットのイメージからタグ情報を抽出するためのCライブラリです。本ライブラリは(({exif(1)}))と同等の機能をrubyから手軽に扱うことを目的としています。 libexif, exifについては、(())を参照して下さい。 = 使い方 require 'exif' # カレントディレクトリのimage.jpgからExifオブジェクトを生成する。 exif = Exif.new('image.jpg') # Exifオブジェクトを生成し、データを与える。 exif = Exif.new File.open('image.jpg') { |f| exif << f.read } # タグのタイトルを用いて値を得る。 p exif["Manufacturer"] # -> "FUJIFILM" # タグのIDを用いて値を得る。 p exif['0xa001'] # -> "FUJIFILM" # # 現在のところ、返り値は文字列オブジェクトで統一されています。 # また、タグとして、次の3つの表現を与えることができます。 # exif["Manufacturer"] ; タグのタイトル # exif["Make"] ; タグのEXIF-2.1で規定された名前 # exif[0xa001] ; タグのIDを16進表記した文字列 # IFDによって規定されているタグの種類は異なりますが、 # (({Exif#ifd=}))によって明示的にIFDを指定しない限り、全てのIFDを対象にして # タグを探し出し、対応する値を返そうとします。明示的にIFDを指定した後、 # そのような動作に戻したいときは、(({Exif#ifd=}))の引数に # (({Exif::IFD::Any}))(暫定的に用意したモジュール定数)を指定して下さい。 # # タグの詳細については、(({Exif.[]}))を用いて調べることができます。 # また、あるIFDにおいて利用可能なタグについては(({Exif#list_tags}))を # 用いて調べることができます。) # サムネイルを抽出し、ファイルに保存する。 File.open('thumb.jpg', 'wb') {|dest| exif.thumbnail(dest)} # サムネイルを設定する。既に存在するサムネイルは破棄される。 File.open('src.jpg', 'rb'){|src| exif.thumbnail = src.read } = リファレンス == class Exif === クラスメソッド --- Exif.new イメージデータが空のExifオブジェクトを生成します。 --- Exif.new(fpath) (({fpath}))で指定されるイメージを読み、Exifオブジェクトを生成します。イメージがEXIFフォーマットではない場合、例外(())が発生します。 --- Exif.[](tagid) 文字列か数値で指定される((|tagid|))に関する説明を得ます。返り値は ['タグのタイトル', ['タグの名前', 'タグの説明', 'タグID(数値)']] です。 === メソッド --- Exif#load(fpath) --- Exif#data=(str) --- Exif#<<(str) rubyのStringオブジェクトで与えられたデータを新たにセットします。すでにデータがセットされていた場合には、それは破棄されます。 --- Exif#list_tags(ifd) IFD ((|ifd|)) で定義されているタグのリストを配列で返します。各要素は ["タグのタイトル", "タグID('0xdddd')"] という配列です。((|ifd|))には(())以下で定義される定数を用いて下さい。 --- Exif#byte_order イメージのバイトオーダーを返します。返り値は(())で定義される定数の値です。 --- Exif#ifd 現在のIFD(Image File Directory)を文字列で返します。 --- Exif#ifd=(ifd) IFD(Image File Directory)を設定します。((|ifd|))は(())以下で定義される定数を用いて下さい。 --- Exif#[](tag) 全てのIFDに渡って与えられたタグ(({tag}))を調べ、これに対応する値を文字列で返します。ただし、(())で明示的にIFDを指定した後は、そのIFDにおいてタグが定義されていれば、対応する値を返します。定義されていない場合には、例外(())が発生します。初期動作に戻したい場合は、(())に(())を指定して下さい。 --- Exif#each_entry(use_tag_id=false) {|tag, value| ...} イメージに含まれるタグのタイトルを(({tag}))、値を(({tag}))として、ブロックを実行します。((|use_tag_id|))が(({true}))のときは(({tag}))にはタグのID('0xdddd'表記)が代入されます。 --- Exif#extract_thumbnail(dest) --- Exif#thumbnail(dest) イメージに含まれるサムネイルを((|dest|))に(({dest#<<}))を用いて書きこみます。 == モジュール == Exif::IFD IFDの種類を表す定数 --- Exif::IFD::Zero --- Exif::IFD::One --- Exif::IFD::EXIF --- Exif::IFD::GPS --- Exif::IFD::Interoperability --- Exif::IFD::Any == Exif::ByteOrder EXIFイメージのバイトオーダーを表す定数 --- Exif::ByteOrder::INTEL --- Exif::ByteOrder::MOTOROLA == 例外クラス RuntimeError --- Exif::Error -+- Exif::Error::NotExifFormat |- Exif::Error::InvalidIFD `- Exif::Error::TagNotFound --- Exif::Error ruby-libexif起源の例外は全てこの例外か、または以下のサブクラスの例外に属します。 --- Exif::Error::ExifFormat 与えられたイメージがEXIFフォーマットに適合していない場合、この例外が発生します。 --- Exif::Error::InvalidIFD (())で、不正なIFDを指定した場合に、この例外が発生します。 --- Exif::Error::TagNotFound (())で、Tagが現在のIFDで見つからなかった場合に、この例外が発生します。 --- Exif::Error::ThumbnailNotFound (())で、イメージにサムネイルが含まれない場合に、この例外が発生します。 =end ruby-exif-0.1.2/extconf.rb000066400000000000000000000006011174061227300154170ustar00rootroot00000000000000require 'mkmf' dir_config("exif", "/usr/local/include", "/usr/local/lib") def have_libexif_header have_header('libexif/exif-ifd.h') and have_header('libexif/exif-data.h') and have_header('libexif/exif-note.h') and have_header('libexif/exif-utils.h') and have_header('libexif/exif-tag.h') end if have_libexif_header and have_library("exif") create_makefile("exif") end