1 files changed, 72 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/photoeditor/filters/Filter.java b/src/com/android/gallery3d/photoeditor/filters/Filter.java
new file mode 100644
index 000000000..c2d3fe5af
--- /dev/null
+++ b/src/com/android/gallery3d/photoeditor/filters/Filter.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2010 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.photoeditor.filters;
+
+import android.media.effect.Effect;
+import android.media.effect.EffectContext;
+
+import com.android.gallery3d.photoeditor.Photo;
+
+/**
+ * Image filter for photo editing.
+ */
+public abstract class Filter {
+
+    // TODO: This should be set in MFF instead.
+    private static final int DEFAULT_TILE_SIZE = 640;
+
+    private boolean isValid;
+    private EffectContext context;
+    private Effect effect;
+
+    protected void validate() {
+        isValid = true;
+    }
+
+    protected Effect getEffect(EffectContext context, String name) {
+        if (this.context != context) {
+            effect = context.getFactory().createEffect(name);
+            effect.setParameter("tile_size", DEFAULT_TILE_SIZE);
+            this.context = context;
+        }
+        return effect;
+    }
+
+    /**
+     * Some filters, e.g. lighting filters, are initially invalid until set up with parameters while
+     * others, e.g. Sepia or Posterize filters, are initially valid without parameters.
+     */
+    public boolean isValid() {
+        return isValid;
+    }
+
+    public void release() {
+        if (effect != null) {
+            effect.release();
+            effect = null;
+        }
+    }
+
+    /**
+     * Processes the source bitmap and matrix and output the destination bitmap and matrix.
+     *
+     * @param context effect context bound to a GL context to create GL effect.
+     * @param src source photo as the input.
+     * @param dst destination photo having the same dimension as source photo as the output.
+     */
+    public abstract void process(EffectContext context, Photo src, Photo dst);
+}