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
17package com.android.gallery3d.filtershow.filters;
18
19import com.android.gallery3d.R;
20import com.android.gallery3d.filtershow.editors.BasicEditor;
21
22public class ImageFilterSharpen extends ImageFilterRS {
23    private static final String SERIALIZATION_NAME = "SHARPEN";
24    private static final String LOGTAG = "ImageFilterSharpen";
25    private ScriptC_convolve3x3 mScript;
26
27    private FilterBasicRepresentation mParameters;
28
29    public ImageFilterSharpen() {
30        mName = "Sharpen";
31    }
32
33    public FilterRepresentation getDefaultRepresentation() {
34        FilterRepresentation representation = new FilterBasicRepresentation("Sharpen", 0, 0, 100);
35        representation.setSerializationName(SERIALIZATION_NAME);
36        representation.setShowParameterValue(true);
37        representation.setFilterClass(ImageFilterSharpen.class);
38        representation.setTextId(R.string.sharpness);
39        representation.setOverlayId(R.drawable.filtershow_button_colors_sharpen);
40        representation.setEditorId(BasicEditor.ID);
41        representation.setSupportsPartialRendering(true);
42        return representation;
43    }
44
45    public void useRepresentation(FilterRepresentation representation) {
46        FilterBasicRepresentation parameters = (FilterBasicRepresentation) representation;
47        mParameters = parameters;
48    }
49
50    @Override
51    protected void resetAllocations() {
52        // nothing to do
53    }
54
55    @Override
56    public void resetScripts() {
57        if (mScript != null) {
58            mScript.destroy();
59            mScript = null;
60        }
61    }
62
63    @Override
64    protected void createFilter(android.content.res.Resources res, float scaleFactor,
65            int quality) {
66        if (mScript == null) {
67            mScript = new ScriptC_convolve3x3(getRenderScriptContext());
68        }
69    }
70
71    private void computeKernel() {
72        float scaleFactor = getEnvironment().getScaleFactor();
73        float p1 = mParameters.getValue() * scaleFactor;
74        float value = p1 / 100.0f;
75        float f[] = new float[9];
76        float p = value;
77        f[0] = -p;
78        f[1] = -p;
79        f[2] = -p;
80        f[3] = -p;
81        f[4] = 8 * p + 1;
82        f[5] = -p;
83        f[6] = -p;
84        f[7] = -p;
85        f[8] = -p;
86        mScript.set_gCoeffs(f);
87    }
88
89    @Override
90    protected void bindScriptValues() {
91        int w = getInPixelsAllocation().getType().getX();
92        int h = getInPixelsAllocation().getType().getY();
93        mScript.set_gWidth(w);
94        mScript.set_gHeight(h);
95    }
96
97    @Override
98    protected void runFilter() {
99        if (mParameters == null) {
100            return;
101        }
102        computeKernel();
103        mScript.set_gIn(getInPixelsAllocation());
104        mScript.bind_gPixels(getInPixelsAllocation());
105        mScript.forEach_root(getInPixelsAllocation(), getOutPixelsAllocation());
106    }
107
108}
109