From 6e28a88be3da4510ac64c6f55757c592c2838cf3 Mon Sep 17 00:00:00 2001
From: wasabeef <dadadada.chop@gmail.com>
Date: Mon, 12 Jan 2015 17:46:09 +0900
Subject: [PATCH] add ContrastFilter

---
 .../gpu/ContrastFilterTransformation.java     | 71 +++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 transformations/src/main/java/jp/wasabeef/glide/transformations/gpu/ContrastFilterTransformation.java

diff --git a/transformations/src/main/java/jp/wasabeef/glide/transformations/gpu/ContrastFilterTransformation.java b/transformations/src/main/java/jp/wasabeef/glide/transformations/gpu/ContrastFilterTransformation.java
new file mode 100644
index 0000000..ec7cd67
--- /dev/null
+++ b/transformations/src/main/java/jp/wasabeef/glide/transformations/gpu/ContrastFilterTransformation.java
@@ -0,0 +1,71 @@
+package jp.wasabeef.glide.transformations.gpu;
+
+/**
+ * Copyright (C) 2015 Wasabeef
+ *
+ * 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.
+ */
+
+import com.bumptech.glide.load.Transformation;
+import com.bumptech.glide.load.engine.Resource;
+import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
+import com.bumptech.glide.load.resource.bitmap.BitmapResource;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+
+import jp.co.cyberagent.android.gpuimage.GPUImage;
+import jp.co.cyberagent.android.gpuimage.GPUImageContrastFilter;
+
+public class ContrastFilterTransformation implements Transformation<Bitmap> {
+
+    private Context mContext;
+    private BitmapPool mBitmapPool;
+
+    private float mContrast;
+
+    public ContrastFilterTransformation(Context context, BitmapPool pool) {
+        mContext = context;
+        mBitmapPool = pool;
+    }
+
+    public ContrastFilterTransformation(Context context, BitmapPool pool, float contrast) {
+        mContext = context;
+        mBitmapPool = pool;
+        mContrast = contrast;
+    }
+
+    @Override
+    public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
+        Bitmap source = resource.get();
+
+        GPUImage gpuImage = new GPUImage(mContext);
+        gpuImage.setImage(source);
+        GPUImageContrastFilter filter = new GPUImageContrastFilter();
+        if (mContrast != 0) {
+            filter.setContrast(mContrast);
+        }
+
+        gpuImage.setFilter(filter);
+        Bitmap bitmap = gpuImage.getBitmapWithFilterApplied();
+
+        source.recycle();
+
+        return BitmapResource.obtain(bitmap, mBitmapPool);
+    }
+
+    @Override
+    public String getId() {
+        return "ContrastFilterTransformation(contrast=" + mContrast + ")";
+    }
+}