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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 com.android.gallery3d.R;
     20 
     21 public class ImageFilterSharpen extends ImageFilterRS {
     22 
     23     private static final String LOGTAG = "ImageFilterSharpen";
     24     private ScriptC_convolve3x3 mScript;
     25 
     26     private FilterBasicRepresentation mParameters;
     27 
     28     public ImageFilterSharpen() {
     29         mName = "Sharpen";
     30     }
     31 
     32     public FilterRepresentation getDefaultRepresentation() {
     33         FilterRepresentation representation = new FilterBasicRepresentation("Sharpen", 0, 0, 100);
     34         representation.setShowParameterValue(true);
     35         representation.setFilterClass(ImageFilterSharpen.class);
     36         representation.setTextId(R.string.sharpness);
     37         representation.setButtonId(R.id.sharpenButton);
     38         representation.setOverlayId(R.drawable.filtershow_button_colors_sharpen);
     39         representation.setEditorId(R.id.imageShow);
     40         representation.setSupportsPartialRendering(true);
     41         return representation;
     42     }
     43 
     44     public void useRepresentation(FilterRepresentation representation) {
     45         FilterBasicRepresentation parameters = (FilterBasicRepresentation) representation;
     46         mParameters = parameters;
     47     }
     48 
     49     @Override
     50     protected void resetAllocations() {
     51         // nothing to do
     52     }
     53 
     54     @Override
     55     protected void resetScripts() {
     56         if (mScript != null) {
     57             mScript.destroy();
     58             mScript = null;
     59         }
     60     }
     61 
     62     @Override
     63     protected void createFilter(android.content.res.Resources res, float scaleFactor,
     64             int quality) {
     65         if (mScript == null) {
     66             mScript = new ScriptC_convolve3x3(getRenderScriptContext(), res, R.raw.convolve3x3);
     67         }
     68     }
     69 
     70     private void computeKernel() {
     71         float scaleFactor = getEnvironment().getScaleFactor();
     72         float p1 = mParameters.getValue() * scaleFactor;
     73         float value = p1 / 100.0f;
     74         float f[] = new float[9];
     75         float p = value;
     76         f[0] = -p;
     77         f[1] = -p;
     78         f[2] = -p;
     79         f[3] = -p;
     80         f[4] = 8 * p + 1;
     81         f[5] = -p;
     82         f[6] = -p;
     83         f[7] = -p;
     84         f[8] = -p;
     85         mScript.set_gCoeffs(f);
     86     }
     87 
     88     @Override
     89     protected void bindScriptValues() {
     90         int w = getInPixelsAllocation().getType().getX();
     91         int h = getInPixelsAllocation().getType().getY();
     92         mScript.set_gWidth(w);
     93         mScript.set_gHeight(h);
     94     }
     95 
     96     @Override
     97     protected void runFilter() {
     98         if (mParameters == null) {
     99             return;
    100         }
    101         computeKernel();
    102         mScript.set_gIn(getInPixelsAllocation());
    103         mScript.bind_gPixels(getInPixelsAllocation());
    104         mScript.forEach_root(getInPixelsAllocation(), getOutPixelsAllocation());
    105     }
    106 
    107 }
    108