1 files changed, 103 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/ui/BitmapTileProvider.java b/src/com/android/gallery3d/ui/BitmapTileProvider.java
new file mode 100644
index 000000000..e1a8b7644
--- /dev/null
+++ b/src/com/android/gallery3d/ui/BitmapTileProvider.java
@@ -0,0 +1,103 @@
+/*
+ * 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.ui;
+
+import android.graphics.Bitmap;
+import android.graphics.Bitmap.Config;
+import android.graphics.Canvas;
+
+import com.android.gallery3d.common.BitmapUtils;
+import com.android.photos.data.GalleryBitmapPool;
+
+import java.util.ArrayList;
+
+public class BitmapTileProvider implements TileImageView.TileSource {
+    private final ScreenNail mScreenNail;
+    private final Bitmap[] mMipmaps;
+    private final Config mConfig;
+    private final int mImageWidth;
+    private final int mImageHeight;
+
+    private boolean mRecycled = false;
+
+    public BitmapTileProvider(Bitmap bitmap, int maxBackupSize) {
+        mImageWidth = bitmap.getWidth();
+        mImageHeight = bitmap.getHeight();
+        ArrayList<Bitmap> list = new ArrayList<Bitmap>();
+        list.add(bitmap);
+        while (bitmap.getWidth() > maxBackupSize
+                || bitmap.getHeight() > maxBackupSize) {
+            bitmap = BitmapUtils.resizeBitmapByScale(bitmap, 0.5f, false);
+            list.add(bitmap);
+        }
+
+        mScreenNail = new BitmapScreenNail(list.remove(list.size() - 1));
+        mMipmaps = list.toArray(new Bitmap[list.size()]);
+        mConfig = Config.ARGB_8888;
+    }
+
+    @Override
+    public ScreenNail getScreenNail() {
+        return mScreenNail;
+    }
+
+    @Override
+    public int getImageHeight() {
+        return mImageHeight;
+    }
+
+    @Override
+    public int getImageWidth() {
+        return mImageWidth;
+    }
+
+    @Override
+    public int getLevelCount() {
+        return mMipmaps.length;
+    }
+
+    @Override
+    public Bitmap getTile(int level, int x, int y, int tileSize) {
+        x >>= level;
+        y >>= level;
+
+        Bitmap result = GalleryBitmapPool.getInstance().get(tileSize, tileSize);
+        if (result == null) {
+            result = Bitmap.createBitmap(tileSize, tileSize, mConfig);
+        } else {
+            result.eraseColor(0);
+        }
+
+        Bitmap mipmap = mMipmaps[level];
+        Canvas canvas = new Canvas(result);
+        int offsetX = -x;
+        int offsetY = -y;
+        canvas.drawBitmap(mipmap, offsetX, offsetY, null);
+        return result;
+    }
+
+    public void recycle() {
+        if (mRecycled) return;
+        mRecycled = true;
+        for (Bitmap bitmap : mMipmaps) {
+            BitmapUtils.recycleSilently(bitmap);
+        }
+        if (mScreenNail != null) {
+            mScreenNail.recycle();
+        }
+    }
+}