1 files changed, 83 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/filters/ImageFilterDownsample.java b/src/com/android/gallery3d/filtershow/filters/ImageFilterDownsample.java
new file mode 100644
index 000000000..efb9cde71
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/filters/ImageFilterDownsample.java
@@ -0,0 +1,83 @@
+/*
+ * 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.filtershow.filters;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Rect;
+
+import com.android.gallery3d.R;
+import com.android.gallery3d.filtershow.cache.ImageLoader;
+import com.android.gallery3d.filtershow.imageshow.MasterImage;
+
+public class ImageFilterDownsample extends SimpleImageFilter {
+    private static final String SERIALIZATION_NAME = "DOWNSAMPLE";
+    private static final int ICON_DOWNSAMPLE_FRACTION = 8;
+    private ImageLoader mImageLoader;
+
+    public ImageFilterDownsample(ImageLoader loader) {
+        mName = "Downsample";
+        mImageLoader = loader;
+    }
+
+    public FilterRepresentation getDefaultRepresentation() {
+        FilterBasicRepresentation representation = (FilterBasicRepresentation) super.getDefaultRepresentation();
+        representation.setName("Downsample");
+        representation.setSerializationName(SERIALIZATION_NAME);
+
+        representation.setFilterClass(ImageFilterDownsample.class);
+        representation.setMaximum(100);
+        representation.setMinimum(1);
+        representation.setValue(50);
+        representation.setDefaultValue(50);
+        representation.setPreviewValue(3);
+        representation.setTextId(R.string.downsample);
+        return representation;
+    }
+
+    @Override
+    public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
+        if (getParameters() == null) {
+            return bitmap;
+        }
+        int w = bitmap.getWidth();
+        int h = bitmap.getHeight();
+        int p = getParameters().getValue();
+
+        // size of original precached image
+        Rect size = MasterImage.getImage().getOriginalBounds();
+        int orig_w = size.width();
+        int orig_h = size.height();
+
+        if (p > 0 && p < 100) {
+            // scale preview to same size as the resulting bitmap from a "save"
+            int newWidth = orig_w * p / 100;
+            int newHeight = orig_h * p / 100;
+
+            // only scale preview if preview isn't already scaled enough
+            if (newWidth <= 0 || newHeight <= 0 || newWidth >= w || newHeight >= h) {
+                return bitmap;
+            }
+            Bitmap ret = Bitmap.createScaledBitmap(bitmap, newWidth, newHeight, true);
+            if (ret != bitmap) {
+                bitmap.recycle();
+            }
+            return ret;
+        }
+        return bitmap;
+    }
+}