ImageFilterVignette.java revision 708753f5a087eb759ef48fe9b41ef2274d2e88a7 
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 android.content.res.Resources;
20import android.graphics.Bitmap;
21import android.graphics.Canvas;
22import android.graphics.Matrix;
23import android.graphics.Rect;
24import com.android.gallery3d.R;
25import com.android.gallery3d.filtershow.imageshow.MasterImage;
26import com.android.gallery3d.filtershow.pipeline.FilterEnvironment;
27import android.support.v8.renderscript.Allocation;
28import android.support.v8.renderscript.Element;
29import android.support.v8.renderscript.RenderScript;
30import android.support.v8.renderscript.Script.LaunchOptions;
31import android.support.v8.renderscript.Type;
32import android.util.Log;
33
34public class ImageFilterVignette extends ImageFilterRS {
35    private static final String LOGTAG = "ImageFilterVignette";
36    private Bitmap mOverlayBitmap;
37    private ScriptC_vignette mScript;
38    FilterVignetteRepresentation mParameters;
39    public static final int MODE_VIGNETTE = FilterVignetteRepresentation.MODE_VIGNETTE;
40    public static final int MODE_EXPOSURE = FilterVignetteRepresentation.MODE_EXPOSURE;
41    public static final int MODE_SATURATION = FilterVignetteRepresentation.MODE_SATURATION;
42    public static final int MODE_CONTRAST = FilterVignetteRepresentation.MODE_CONTRAST;
43    public static final int MODE_FALLOFF = FilterVignetteRepresentation.MODE_FALLOFF;
44
45    public ImageFilterVignette() {
46        mName = "Vignette";
47    }
48
49    @Override
50    public FilterRepresentation getDefaultRepresentation() {
51        FilterVignetteRepresentation representation = new FilterVignetteRepresentation();
52        return representation;
53    }
54
55    @Override
56    public void useRepresentation(FilterRepresentation representation) {
57        mParameters = (FilterVignetteRepresentation) representation;
58    }
59
60    native protected void nativeApplyFilter(
61            Bitmap bitmap, int w, int h, int cx, int cy, float radx, float rady,
62            float strength, float finalValue);
63
64    private float calcRadius(float cx, float cy, int w, int h) {
65        float d = cx;
66        if (d < (w - cx)) {
67            d = w - cx;
68        }
69        if (d < cy) {
70            d = cy;
71        }
72        if (d < (h - cy)) {
73            d = h - cy;
74        }
75        return d * d * 2.0f;
76    }
77
78    @Override
79    protected void createFilter(Resources res, float scaleFactor, int quality) {
80        RenderScript rsCtx = getRenderScriptContext();
81
82        mScript = new ScriptC_vignette(rsCtx, res, R.raw.vignette);
83    }
84
85    @Override
86    protected void runFilter() {
87
88        int w = getInPixelsAllocation().getType().getX();
89        int h = getInPixelsAllocation().getType().getY();
90
91        float cx = w / 2;
92        float cy = h / 2;
93        float r = calcRadius(cx, cy, w, h);
94        float rx = r;
95        float ry = r;
96
97        float[]c = new float[2];
98        if (mParameters.isCenterSet()) {
99            Matrix m = getOriginalToScreenMatrix(w, h);
100            Rect bounds = MasterImage.getImage().getOriginalBounds();
101            c[0] = bounds.right * mParameters.getCenterX();
102            c[1] = bounds.bottom * mParameters.getCenterY();
103            m.mapPoints(c);
104            cx = c[0];
105            cy = c[1];
106            c[0] = bounds.right * mParameters.getRadiusX();
107            c[1] = bounds.bottom * mParameters.getRadiusY();
108            m.mapVectors(c);
109            rx = c[0];
110            ry = c[1];
111        }
112
113        mScript.set_inputWidth(w);
114        mScript.set_inputHeight(h);
115        int v = mParameters.getValue(MODE_VIGNETTE);
116        mScript.set_finalSubtract((v < 0) ? v : 0);
117        mScript.set_finalBright((v > 0) ? -v : 0);
118        mScript.set_finalSaturation(mParameters.getValue(MODE_SATURATION));
119        mScript.set_finalContrast(mParameters.getValue(MODE_CONTRAST));
120        mScript.set_centerx(cx);
121        mScript.set_centery(cy);
122        mScript.set_radiusx(rx);
123        mScript.set_radiusy(ry);
124        mScript.set_strength(mParameters.getValue(MODE_FALLOFF)/10.f);
125        mScript.invoke_setupVignetteParams();
126        mScript.forEach_vignette(getInPixelsAllocation(), getOutPixelsAllocation());
127    }
128
129    @Override
130    public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
131        if (SIMPLE_ICONS && FilterEnvironment.QUALITY_ICON == quality) {
132            if (mOverlayBitmap == null) {
133                Resources res = getEnvironment().getPipeline().getResources();
134                mOverlayBitmap = IconUtilities.getFXBitmap(res,
135                        R.drawable.filtershow_icon_vignette);
136            }
137
138            Canvas c = new Canvas(bitmap);
139            int dim = Math.max(bitmap.getWidth(), bitmap.getHeight());
140            Rect r = new Rect(0, 0, dim, dim);
141            c.drawBitmap(mOverlayBitmap, null, r, null);
142            return bitmap;
143        }
144        Bitmap ret = super.apply(bitmap, scaleFactor, quality);
145        return bitmap;
146    }
147
148
149    @Override
150    protected void resetAllocations() {
151
152    }
153
154    @Override
155    public void resetScripts() {
156
157    }
158
159    @Override
160    protected void bindScriptValues() {
161        int width = getInPixelsAllocation().getType().getX();
162        int height = getInPixelsAllocation().getType().getY();
163        mScript.set_inputWidth(width);
164        mScript.set_inputHeight(height);
165    }
166}
167