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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.gallery3d.filtershow.filters;
     18 
     19 import android.app.Activity;
     20 import android.graphics.Bitmap;
     21 import android.graphics.Matrix;
     22 import android.renderscript.Allocation;
     23 import android.widget.Toast;
     24 
     25 import com.android.gallery3d.filtershow.imageshow.GeometryMathUtils;
     26 import com.android.gallery3d.filtershow.imageshow.MasterImage;
     27 import com.android.gallery3d.filtershow.pipeline.FilterEnvironment;
     28 
     29 public abstract class ImageFilter implements Cloneable {
     30     private FilterEnvironment mEnvironment = null;
     31 
     32     protected String mName = "Original";
     33     private final String LOGTAG = "ImageFilter";
     34     protected static final boolean SIMPLE_ICONS = true;
     35     // TODO: Temporary, for dogfood note memory issues with toasts for better
     36     // feedback. Remove this when filters actually work in low memory
     37     // situations.
     38     private static Activity sActivity = null;
     39 
     40     public static void setActivityForMemoryToasts(Activity activity) {
     41         sActivity = activity;
     42     }
     43 
     44     public static void resetStatics() {
     45         sActivity = null;
     46     }
     47 
     48     public void freeResources() {}
     49 
     50     public void displayLowMemoryToast() {
     51         if (sActivity != null) {
     52             sActivity.runOnUiThread(new Runnable() {
     53                 public void run() {
     54                     Toast.makeText(sActivity, "Memory too low for filter " + getName() +
     55                             ", please file a bug report", Toast.LENGTH_SHORT).show();
     56                 }
     57             });
     58         }
     59     }
     60 
     61     public void setName(String name) {
     62         mName = name;
     63     }
     64 
     65     public String getName() {
     66         return mName;
     67     }
     68 
     69     public boolean supportsAllocationInput() { return false; }
     70 
     71     public void apply(Allocation in, Allocation out) {
     72         setGeneralParameters();
     73     }
     74 
     75     public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
     76         // do nothing here, subclasses will implement filtering here
     77         setGeneralParameters();
     78         return bitmap;
     79     }
     80 
     81     public abstract void useRepresentation(FilterRepresentation representation);
     82 
     83     native protected void nativeApplyGradientFilter(Bitmap bitmap, int w, int h,
     84             int[] redGradient, int[] greenGradient, int[] blueGradient);
     85 
     86     public FilterRepresentation getDefaultRepresentation() {
     87         return null;
     88     }
     89 
     90     protected Matrix getOriginalToScreenMatrix(int w, int h) {
     91         return GeometryMathUtils.getImageToScreenMatrix(getEnvironment().getImagePreset()
     92                 .getGeometryFilters(), true, MasterImage.getImage().getOriginalBounds(), w, h);
     93     }
     94 
     95     public void setEnvironment(FilterEnvironment environment) {
     96         mEnvironment = environment;
     97     }
     98 
     99     public FilterEnvironment getEnvironment() {
    100         return mEnvironment;
    101     }
    102 
    103     public void setGeneralParameters() {
    104         // should implement in subclass which like to transport
    105         // some information to other filters. (like the style setting from RetroLux
    106         // and Film to FixedFrame)
    107         mEnvironment.clearGeneralParameters();
    108     }
    109 }
    110