diff options
Diffstat (limited to 'src/com/android/gallery3d/exif/ExifData.java')
| -rw-r--r-- | src/com/android/gallery3d/exif/ExifData.java | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/exif/ExifData.java b/src/com/android/gallery3d/exif/ExifData.java index 776f77a65..0251c74b1 100644 --- a/src/com/android/gallery3d/exif/ExifData.java +++ b/src/com/android/gallery3d/exif/ExifData.java @@ -142,4 +142,40 @@ public class ExifData { } return false; } + + public void addGpsTags(double latitude, double longitude) { + IfdData gpsIfd = getIfdData(IfdId.TYPE_IFD_GPS); + if (gpsIfd == null) { + gpsIfd = new IfdData(IfdId.TYPE_IFD_GPS); + addIfdData(gpsIfd); + } + ExifTag latTag = new ExifTag(ExifTag.GPS_TAG.TAG_GPS_LATITUDE, ExifTag.TYPE_RATIONAL, + 3, IfdId.TYPE_IFD_GPS); + ExifTag longTag = new ExifTag(ExifTag.GPS_TAG.TAG_GPS_LONGITUDE, ExifTag.TYPE_RATIONAL, + 3, IfdId.TYPE_IFD_GPS); + ExifTag latRefTag = new ExifTag(ExifTag.GPS_TAG.TAG_GPS_LATITUDE_REF, + ExifTag.TYPE_ASCII, 2, IfdId.TYPE_IFD_GPS); + ExifTag longRefTag = new ExifTag(ExifTag.GPS_TAG.TAG_GPS_LONGITUDE_REF, + ExifTag.TYPE_ASCII, 2, IfdId.TYPE_IFD_GPS); + latTag.setValue(toExifLatLong(latitude)); + longTag.setValue(toExifLatLong(longitude)); + latRefTag.setValue(latitude >= 0 ? "N" : "S"); + longRefTag.setValue(longitude >= 0 ? "E" : "W"); + gpsIfd.setTag(latTag); + gpsIfd.setTag(longTag); + gpsIfd.setTag(latRefTag); + gpsIfd.setTag(longRefTag); + } + + private static Rational[] toExifLatLong(double value) { + // convert to the format dd/1 mm/1 ssss/100 + value = Math.abs(value); + int degrees = (int) value; + value = (value - degrees) * 60; + int minutes = (int) value; + value = (value - minutes) * 6000; + int seconds = (int) value; + return new Rational[] { + new Rational(degrees, 1), new Rational(minutes, 1), new Rational(seconds, 100)}; + } }
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