add CropType(Top, Center, Bottom) for CropTransformation

example/src/main/java/jp/wasabeef/example/glide/MainActivity.java

@@ -22,7 +22,9 @@ public class MainActivity extends ActionBarActivity {
         recyclerView.setLayoutManager(new GridLayoutManager(this, 2));
 
         List<Type> dataSet = new ArrayList<>();
-        dataSet.add(Type.Crop);
+        dataSet.add(Type.CropTop);
+        dataSet.add(Type.CropCenter);
+        dataSet.add(Type.CropBottom);
         dataSet.add(Type.CropSquare);
         dataSet.add(Type.CropCircle);
         dataSet.add(Type.ColorFilter);

example/src/main/java/jp/wasabeef/example/glide/MainAdapter.java

@@ -45,7 +45,9 @@ public class MainAdapter extends RecyclerView.Adapter<MainAdapter.ViewHolder> {
     private BitmapPool mPool;
 
     enum Type {
-        Crop,
+        CropTop,
+        CropCenter,
+        CropBottom,
         CropSquare,
         CropCircle,
         ColorFilter,
@@ -81,9 +83,17 @@ public class MainAdapter extends RecyclerView.Adapter<MainAdapter.ViewHolder> {
     public void onBindViewHolder(MainAdapter.ViewHolder holder, int position) {
         Transformation<Bitmap> transformation = null;
         switch (mDataSet.get(position)) {
-            case Crop:
+            case CropTop:
+                transformation =
+                        new CropTransformation(mPool, 300, 100, CropTransformation.CropType.TOP);
+                break;
+            case CropCenter:
                 transformation = new CropTransformation(mPool, 300, 100);
                 break;
+            case CropBottom:
+                transformation =
+                        new CropTransformation(mPool, 300, 100, CropTransformation.CropType.BOTTOM);
+                break;
             case CropSquare:
                 transformation = new CropSquareTransformation(mPool);
                 break;

transformations/src/main/java/jp/wasabeef/glide/transformations/CropTransformation.java

@@ -31,6 +31,8 @@ public class CropTransformation implements Transformation<Bitmap> {
     private int mWidth;
     private int mHeight;
 
+    private CropType mCropType = CropType.CENTER;
+
     public CropTransformation(BitmapPool pool) {
         mBitmapPool = pool;
     }
@@ -41,6 +43,13 @@ public class CropTransformation implements Transformation<Bitmap> {
         mHeight = height;
     }
 
+    public CropTransformation(BitmapPool pool, int width, int height, CropType cropType) {
+        mBitmapPool = pool;
+        mWidth = width;
+        mHeight = height;
+        mCropType = cropType;
+    }
+
     @Override
     public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
         Bitmap source = resource.get();
@@ -65,7 +74,7 @@ public class CropTransformation implements Transformation<Bitmap> {
         float scaledWidth = scale * source.getWidth();
         float scaledHeight = scale * source.getHeight();
         float left = (mWidth - scaledWidth) / 2;
-        float top = (mHeight - scaledHeight) / 2;
+        float top = getTop(scaledHeight);
         RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
 
         Canvas canvas = new Canvas(bitmap);
@@ -76,6 +85,26 @@ public class CropTransformation implements Transformation<Bitmap> {
 
     @Override
     public String getId() {
-        return "CropTransformation(width=" + mWidth + ", height=" + mHeight + ")";
+        return "CropTransformation(width=" + mWidth + ", height=" + mHeight + ", cropType="
+                + mCropType + ")";
+    }
+
+    private float getTop(float scaledHeight) {
+        switch (mCropType) {
+            case TOP:
+                return 0;
+            case CENTER:
+                return (mHeight - scaledHeight) / 2;
+            case BOTTOM:
+                return mHeight - scaledHeight;
+            default:
+                return 0;
+        }
+    }
+
+    public enum CropType {
+        TOP,
+        CENTER,
+        BOTTOM
     }
 }