From a7723fb08098c0c7682b02cf459cafa3792a4ce4 Mon Sep 17 00:00:00 2001
From: Tim Murray <timmurray@google.com>
Date: Thu, 7 Mar 2013 14:00:45 -0800
Subject: Add convertRGBAtoA.

Change-Id: I358bc0517480883c470df51189f46fb238fde101
---
 .../filtershow/filters/ImageFilterRS.java          | 20 ++++++++++++++++++++
 .../android/gallery3d/filtershow/filters/grey.rs   | 22 ++++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 src/com/android/gallery3d/filtershow/filters/grey.rs

diff --git a/src/com/android/gallery3d/filtershow/filters/ImageFilterRS.java b/src/com/android/gallery3d/filtershow/filters/ImageFilterRS.java
index a3467edde..4373c950a 100644
--- a/src/com/android/gallery3d/filtershow/filters/ImageFilterRS.java
+++ b/src/com/android/gallery3d/filtershow/filters/ImageFilterRS.java
@@ -20,6 +20,7 @@ import android.app.Activity;
 import android.graphics.Bitmap;
 import android.support.v8.renderscript.*;
 import android.util.Log;
+import com.android.gallery3d.R;
 
 public abstract class ImageFilterRS extends ImageFilter {
     private final String LOGTAG = "ImageFilterRS";
@@ -118,4 +119,23 @@ public abstract class ImageFilterRS extends ImageFilter {
         sOldBitmap = null;
     }
 
+    public Allocation convertRGBAtoA(Bitmap bitmap) {
+        Type.Builder tb_a8 = new Type.Builder(mRS, Element.U8(mRS));
+        ScriptC_grey greyConvert = new ScriptC_grey(mRS, mResources, R.raw.grey);
+
+        Allocation bitmapTemp = Allocation.createFromBitmap(mRS, bitmap);
+
+        if (bitmapTemp.getType().getElement().isCompatible(Element.U8(mRS))) {
+            return bitmapTemp;
+        }
+
+        tb_a8.setX(bitmapTemp.getType().getX());
+        tb_a8.setY(bitmapTemp.getType().getY());
+        Allocation bitmapAlloc = Allocation.createTyped(mRS, tb_a8.create());
+        greyConvert.forEach_RGBAtoA(bitmapTemp, bitmapAlloc);
+
+        return bitmapAlloc;
+
+    }
+
 }
diff --git a/src/com/android/gallery3d/filtershow/filters/grey.rs b/src/com/android/gallery3d/filtershow/filters/grey.rs
new file mode 100644
index 000000000..e01880360
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/filters/grey.rs
@@ -0,0 +1,22 @@
+  /*
+ * Copyright (C) 2013 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.
+ */
+
+#pragma version(1)
+#pragma rs java_package_name(com.android.gallery3d.filtershow.filters)
+
+uchar __attribute__((kernel)) RGBAtoA(uchar4 in) {
+    return in.r;
+}
-- 
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