1 files changed, 80 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/widget/WidgetUtils.java b/src/com/android/gallery3d/widget/WidgetUtils.java
new file mode 100644
index 000000000..481bbddbc
--- /dev/null
+++ b/src/com/android/gallery3d/widget/WidgetUtils.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2011 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.widget;
+
+import com.android.gallery3d.R;
+import com.android.gallery3d.data.MediaItem;
+import com.android.gallery3d.util.ThreadPool;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Bitmap.Config;
+import android.util.Log;
+
+public class WidgetUtils {
+
+    private static final String TAG = "WidgetUtils";
+
+    private static int sStackPhotoWidth = 220;
+    private static int sStackPhotoHeight = 170;
+
+    private WidgetUtils() {
+    }
+
+    public static void initialize(Context context) {
+        Resources r = context.getResources();
+        sStackPhotoWidth = r.getDimensionPixelSize(R.dimen.stack_photo_width);
+        sStackPhotoHeight = r.getDimensionPixelSize(R.dimen.stack_photo_height);
+    }
+
+    public static Bitmap createWidgetBitmap(MediaItem image) {
+        Bitmap bitmap = image.requestImage(MediaItem.TYPE_THUMBNAIL)
+               .run(ThreadPool.JOB_CONTEXT_STUB);
+        if (bitmap == null) {
+            Log.w(TAG, "fail to get image of " + image.toString());
+            return null;
+        }
+        return createWidgetBitmap(bitmap, image.getRotation());
+    }
+
+    public static Bitmap createWidgetBitmap(Bitmap bitmap, int rotation) {
+        int w = bitmap.getWidth();
+        int h = bitmap.getHeight();
+
+        float scale;
+        if (((rotation / 90) & 1) == 0) {
+            scale = Math.max((float) sStackPhotoWidth / w,
+                    (float) sStackPhotoHeight / h);
+        } else {
+            scale = Math.max((float) sStackPhotoWidth / h,
+                    (float) sStackPhotoHeight / w);
+        }
+
+        Bitmap target = Bitmap.createBitmap(
+                sStackPhotoWidth, sStackPhotoHeight, Config.ARGB_8888);
+        Canvas canvas = new Canvas(target);
+        canvas.translate(sStackPhotoWidth / 2, sStackPhotoHeight / 2);
+        canvas.rotate(rotation);
+        canvas.scale(scale, scale);
+        Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.DITHER_FLAG);
+        canvas.drawBitmap(bitmap, -w / 2, -h / 2, paint);
+        return target;
+    }
+}