Added sobel filter for edge function.

Change-Id: I4d59a96585f4902cd01d26ff68c777b542041132

2 files changed, 43 insertions, 1 deletions

diff --git a/src/com/android/gallery3d/filtershow/FilterShowActivity.java b/src/com/android/gallery3d/filtershow/FilterShowActivity.java
index 6275ae62d..a3da0c6be 100644
--- a/src/com/android/gallery3d/filtershow/FilterShowActivity.java
+++ b/src/com/android/gallery3d/filtershow/FilterShowActivity.java
@@ -61,6 +61,7 @@ import com.android.gallery3d.filtershow.filters.ImageFilterBorder;
 import com.android.gallery3d.filtershow.filters.ImageFilterBwFilter;
 import com.android.gallery3d.filtershow.filters.ImageFilterContrast;
 import com.android.gallery3d.filtershow.filters.ImageFilterCurves;
+import com.android.gallery3d.filtershow.filters.ImageFilterEdge;
 import com.android.gallery3d.filtershow.filters.ImageFilterExposure;
 import com.android.gallery3d.filtershow.filters.ImageFilterFx;
 import com.android.gallery3d.filtershow.filters.ImageFilterHue;
@@ -309,7 +310,8 @@ public class FilterShowActivity extends Activity implements OnItemClickListener,
                 new ImageFilterHue(),
                 new ImageFilterSaturated(),
                 new ImageFilterBwFilter(),
-                new ImageFilterNegative()
+                new ImageFilterNegative(),
+                new ImageFilterEdge()
         };
 
         for (int i = 0; i < filters.length; i++) {
diff --git a/src/com/android/gallery3d/filtershow/filters/ImageFilterEdge.java b/src/com/android/gallery3d/filtershow/filters/ImageFilterEdge.java
new file mode 100644
index 000000000..e2ce0dacd
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/filters/ImageFilterEdge.java
@@ -0,0 +1,40 @@
+package com.android.gallery3d.filtershow.filters;
+
+import android.graphics.Bitmap;
+
+import com.android.gallery3d.R;
+
+public class ImageFilterEdge extends ImageFilter {
+
+    public ImageFilterEdge() {
+        mName = "Edge";
+        mPreviewParameter = 0;
+    }
+
+    native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, float p);
+
+    @Override
+    public int getButtonId() {
+        return R.id.edgeButton;
+    }
+
+    @Override
+    public int getTextId() {
+        return R.string.edge;
+    }
+
+    @Override
+    public boolean isNil() {
+        return false;
+    }
+
+    @Override
+    public Bitmap apply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
+        int w = bitmap.getWidth();
+        int h = bitmap.getHeight();
+        float p = mParameter + 101;
+        p = (float) p / 100;
+        nativeApplyFilter(bitmap, w, h, p);
+        return bitmap;
+    }
+}