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author | Hung-ying Tyan <tyanh@google.com> | 2012-10-19 20:50:50 +0800 |
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committer | Hung-ying Tyan <tyanh@google.com> | 2012-10-22 10:50:20 +0800 |
commit | 2c6c9f9d75d03174b446ff218ac66cf81bba5109 (patch) | |
tree | c98d4def4e971fef35f6fd0f44ba77557589e0ae /gallerycommon/src/com/android/gallery3d/exif/IfdData.java | |
parent | 08999d276db9b07c2fdd28d11ea6a20ca05aaa2e (diff) | |
download | android_packages_apps_Snap-2c6c9f9d75d03174b446ff218ac66cf81bba5109.tar.gz android_packages_apps_Snap-2c6c9f9d75d03174b446ff218ac66cf81bba5109.tar.bz2 android_packages_apps_Snap-2c6c9f9d75d03174b446ff218ac66cf81bba5109.zip |
Move new exif lib to gallerycommon.
https://googleplex-android-review.googlesource.com/#/c/242047 depends on this.
Bug: 6667860
Change-Id: Iac937e2eea94f0f5ffde876235b1c2ee748e7570
Diffstat (limited to 'gallerycommon/src/com/android/gallery3d/exif/IfdData.java')
-rw-r--r-- | gallerycommon/src/com/android/gallery3d/exif/IfdData.java | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/gallerycommon/src/com/android/gallery3d/exif/IfdData.java b/gallerycommon/src/com/android/gallery3d/exif/IfdData.java new file mode 100644 index 000000000..78f9173cc --- /dev/null +++ b/gallerycommon/src/com/android/gallery3d/exif/IfdData.java @@ -0,0 +1,122 @@ +/* + * Copyright (C) 2012 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.gallery3d.exif; + +import java.util.HashMap; +import java.util.Map; + +/** + * This class stores all the tags in an IFD. + * + * @see ExifData + * @see ExifTag + */ +class IfdData { + + private final int mIfdId; + private final Map<Short, ExifTag> mExifTags = new HashMap<Short, ExifTag>(); + private int mOffsetToNextIfd = 0; + + /** + * Creates an IfdData with given IFD ID. + * + * @see IfdId#TYPE_IFD_0 + * @see IfdId#TYPE_IFD_1 + * @see IfdId#TYPE_IFD_EXIF + * @see IfdId#TYPE_IFD_GPS + * @see IfdId#TYPE_IFD_INTEROPERABILITY + */ + public IfdData(int ifdId) { + mIfdId = ifdId; + } + + /** + * Get a array the contains all {@link ExifTag} in this IFD. + */ + public ExifTag[] getAllTags() { + return mExifTags.values().toArray(new ExifTag[mExifTags.size()]); + } + + /** + * Gets the ID of this IFD. + * + * @see IfdId#TYPE_IFD_0 + * @see IfdId#TYPE_IFD_1 + * @see IfdId#TYPE_IFD_EXIF + * @see IfdId#TYPE_IFD_GPS + * @see IfdId#TYPE_IFD_INTEROPERABILITY + */ + public int getId() { + return mIfdId; + } + + /** + * Gets the {@link ExifTag} with given tag id. Return null if there is no such tag. + */ + public ExifTag getTag(short tagId) { + return mExifTags.get(tagId); + } + + /** + * Adds or replaces a {@link ExifTag}. + */ + public void setTag(ExifTag tag) { + mExifTags.put(tag.getTagId(), tag); + } + + /** + * Gets the tags count in the IFD. + */ + public int getTagCount() { + return mExifTags.size(); + } + + /** + * Sets the offset of next IFD. + */ + void setOffsetToNextIfd(int offset) { + mOffsetToNextIfd = offset; + } + + /** + * Gets the offset of next IFD. + */ + int getOffsetToNextIfd() { + return mOffsetToNextIfd; + } + + /** + * Returns true if all tags in this two IFDs are equal. Note that tags of IFDs offset or + * thumbnail offset will be ignored. + */ + @Override + public boolean equals(Object obj) { + if (obj instanceof IfdData) { + IfdData data = (IfdData) obj; + if (data.getId() == mIfdId && data.getTagCount() == getTagCount()) { + ExifTag[] tags = data.getAllTags(); + for (ExifTag tag: tags) { + if (ExifTag.isOffsetTag(tag.getTagId())) continue; + ExifTag tag2 = mExifTags.get(tag.getTagId()); + if (!tag.equals(tag2)) return false; + } + return true; + } + } + return false; + } +}
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