Class: Exiv2::Tag

Inherits:

Object

• Object
• Exiv2::Tag

Defined in:

ext/exif.cpp

Class Method Summary

• .count ⇒ Object

  Count of all available exif tags.

• .each ⇒ Object

  Iterates through all available exif tags, that can be set in the image.

Instance Method Summary

• #desc ⇒ Object

  description of exif tag.

• #ifd ⇒ Object

  IFD of exif tag.

• #name ⇒ Object

  Name of exif tag.

• #section ⇒ Object

  section of exif tag.

• #title ⇒ Object

  title of exif tag.

Class Method Details

.count ⇒ Object

Count of all available exif tags

# File 'ext/exif.cpp', line 274

static VALUE exiv2_tags_count(VALUE self) {
	__BEGIN
	return INT2NUM(
	iterate_tag_collection(Exiv2::ExifTags::ifdTagList(), false) +
	iterate_tag_collection(Exiv2::ExifTags::exifTagList(), false) +
	iterate_tag_collection(Exiv2::ExifTags::iopTagList(), false) +
	iterate_tag_collection(Exiv2::ExifTags::gpsTagList(), false)
	);
	__END
}

.each ⇒ Object

Iterates through all available exif tags, that can be set in the image

# File 'ext/exif.cpp', line 260

static VALUE exiv2_tags_each(VALUE self) {
	__BEGIN
	iterate_tag_collection(Exiv2::ExifTags::ifdTagList());
	iterate_tag_collection(Exiv2::ExifTags::exifTagList());
	iterate_tag_collection(Exiv2::ExifTags::iopTagList());
	iterate_tag_collection(Exiv2::ExifTags::gpsTagList());
	return self;
	__END
}

Instance Method Details

#desc ⇒ Object

description of exif tag

# File 'ext/exif.cpp', line 313

static VALUE exiv2_tag_desc(VALUE self) {
	__BEGIN
	Exiv2::TagInfo* tag;
	Data_Get_Struct(self, Exiv2::TagInfo, tag);
	
	return tag->desc_ ? rb_str_new2(tag->desc_) : Qnil;
	__END
}

#ifd ⇒ Object

IFD of exif tag

# File 'ext/exif.cpp', line 337

static VALUE exiv2_tag_ifd(VALUE self) {
	__BEGIN
	Exiv2::TagInfo* tag;
	Data_Get_Struct(self, Exiv2::TagInfo, tag);
	
	return rb_str_new2(Exiv2::ExifTags::ifdName(tag->ifdId_));
	__END
}

#name ⇒ Object

Name of exif tag

# File 'ext/exif.cpp', line 289

static VALUE exiv2_tag_name(VALUE self) {
	__BEGIN
	Exiv2::TagInfo* tag;
	Data_Get_Struct(self, Exiv2::TagInfo, tag);
	
	return tag->name_ ? rb_str_new2(tag->name_) : Qnil;
	__END
}

#section ⇒ Object

section of exif tag

# File 'ext/exif.cpp', line 325

static VALUE exiv2_tag_section(VALUE self) {
	__BEGIN
	Exiv2::TagInfo* tag;
	Data_Get_Struct(self, Exiv2::TagInfo, tag);
	
	return rb_str_new2(Exiv2::ExifTags::sectionName(tag->sectionId_));
	__END
}

#title ⇒ Object

title of exif tag

# File 'ext/exif.cpp', line 301

static VALUE exiv2_tag_title(VALUE self) {
	__BEGIN
	Exiv2::TagInfo* tag;
	Data_Get_Struct(self, Exiv2::TagInfo, tag);
	
	return tag->title_ ? rb_str_new2(tag->title_) : Qnil;
	__END
}