ImageFilterBorder.java revision f4486566491c2f6c51817f92ee1000d12db41c1b 
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.BitmapFactory;
22import android.graphics.Canvas;
23import android.graphics.Rect;
24import android.graphics.drawable.BitmapDrawable;
25import android.graphics.drawable.Drawable;
26
27import java.util.HashMap;
28
29public class ImageFilterBorder extends ImageFilter {
30    private static final float NINEPATCH_ICON_SCALING = 10;
31    private static final float BITMAP_ICON_SCALING = 1 / 3.0f;
32    private FilterImageBorderRepresentation mParameters = null;
33    private Resources mResources = null;
34
35    private HashMap<Integer, Drawable> mDrawables = new HashMap<Integer, Drawable>();
36
37    public ImageFilterBorder() {
38        mName = "Border";
39    }
40
41    public void useRepresentation(FilterRepresentation representation) {
42        FilterImageBorderRepresentation parameters = (FilterImageBorderRepresentation) representation;
43        mParameters = parameters;
44    }
45
46    public FilterImageBorderRepresentation getParameters() {
47        return mParameters;
48    }
49
50    public void freeResources() {
51       mDrawables.clear();
52    }
53
54    public Bitmap applyHelper(Bitmap bitmap, float scale1, float scale2 ) {
55        int w = bitmap.getWidth();
56        int h = bitmap.getHeight();
57        Rect bounds = new Rect(0, 0, (int) (w * scale1), (int) (h * scale1));
58        Canvas canvas = new Canvas(bitmap);
59        canvas.scale(scale2, scale2);
60        Drawable drawable = getDrawable(getParameters().getDrawableResource());
61        drawable.setBounds(bounds);
62        drawable.draw(canvas);
63        return bitmap;
64    }
65
66    @Override
67    public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
68        if (getParameters() == null || getParameters().getDrawableResource() == 0) {
69            return bitmap;
70        }
71        float scale2 = scaleFactor * 2.0f;
72        float scale1 = 1 / scale2;
73        return applyHelper(bitmap, scale1, scale2);
74    }
75
76    public void setResources(Resources resources) {
77        if (mResources != resources) {
78            mResources = resources;
79            mDrawables.clear();
80        }
81    }
82
83    public Drawable getDrawable(int rsc) {
84        Drawable drawable = mDrawables.get(rsc);
85        if (drawable == null && mResources != null && rsc != 0) {
86            drawable = new BitmapDrawable(mResources, BitmapFactory.decodeResource(mResources, rsc));
87            mDrawables.put(rsc, drawable);
88        }
89        return drawable;
90    }
91
92}
93