Initial code for Gallery2.

fix: 5176434

Change-Id: I041e282b9c7b34ceb1db8b033be2b853bb3a992c

1 files changed, 89 insertions, 0 deletions

diff --git a/src/com/android/gallery3d/data/ImageCacheRequest.java b/src/com/android/gallery3d/data/ImageCacheRequest.java
new file mode 100644
index 000000000..104ff4839
--- /dev/null
+++ b/src/com/android/gallery3d/data/ImageCacheRequest.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2010 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.data;
+
+import com.android.gallery3d.app.GalleryApp;
+import com.android.gallery3d.common.BitmapUtils;
+import com.android.gallery3d.data.ImageCacheService.ImageData;
+import com.android.gallery3d.util.ThreadPool.Job;
+import com.android.gallery3d.util.ThreadPool.JobContext;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+
+abstract class ImageCacheRequest implements Job<Bitmap> {
+    private static final String TAG = "ImageCacheRequest";
+
+    protected GalleryApp mApplication;
+    private Path mPath;
+    private int mType;
+    private int mTargetSize;
+
+    public ImageCacheRequest(GalleryApp application,
+            Path path, int type, int targetSize) {
+        mApplication = application;
+        mPath = path;
+        mType = type;
+        mTargetSize = targetSize;
+    }
+
+    public Bitmap run(JobContext jc) {
+        String debugTag = mPath + "," +
+                 ((mType == MediaItem.TYPE_THUMBNAIL) ? "THUMB" :
+                 (mType == MediaItem.TYPE_MICROTHUMBNAIL) ? "MICROTHUMB" : "?");
+        ImageCacheService cacheService = mApplication.getImageCacheService();
+
+        ImageData data = cacheService.getImageData(mPath, mType);
+        if (jc.isCancelled()) return null;
+
+        if (data != null) {
+            BitmapFactory.Options options = new BitmapFactory.Options();
+            options.inPreferredConfig = Bitmap.Config.ARGB_8888;
+            Bitmap bitmap = DecodeUtils.requestDecode(jc, data.mData,
+                    data.mOffset, data.mData.length - data.mOffset, options);
+            if (bitmap == null && !jc.isCancelled()) {
+                Log.w(TAG, "decode cached failed " + debugTag);
+            }
+            return bitmap;
+        } else {
+            Bitmap bitmap = onDecodeOriginal(jc, mType);
+            if (jc.isCancelled()) return null;
+
+            if (bitmap == null) {
+                Log.w(TAG, "decode orig failed " + debugTag);
+                return null;
+            }
+
+            if (mType == MediaItem.TYPE_MICROTHUMBNAIL) {
+                bitmap = BitmapUtils.resizeDownAndCropCenter(bitmap,
+                        mTargetSize, true);
+            } else {
+                bitmap = BitmapUtils.resizeDownBySideLength(bitmap,
+                        mTargetSize, true);
+            }
+            if (jc.isCancelled()) return null;
+
+            byte[] array = BitmapUtils.compressBitmap(bitmap);
+            if (jc.isCancelled()) return null;
+
+            cacheService.putImageData(mPath, mType, array);
+            return bitmap;
+        }
+    }
+
+    public abstract Bitmap onDecodeOriginal(JobContext jc, int targetSize);
+}