1/*
2 * Copyright (C) 2013 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.launcher3;
18
19import android.content.Context;
20import android.graphics.Bitmap;
21import android.graphics.Canvas;
22import android.graphics.Rect;
23import android.graphics.drawable.Drawable;
24
25import com.android.gallery3d.glrenderer.BasicTexture;
26import com.android.gallery3d.glrenderer.BitmapTexture;
27import com.android.photos.views.TiledImageRenderer;
28
29public class DrawableTileSource implements TiledImageRenderer.TileSource {
30    private static final int GL_SIZE_LIMIT = 2048;
31    // This must be no larger than half the size of the GL_SIZE_LIMIT
32    // due to decodePreview being allowed to be up to 2x the size of the target
33    public static final int MAX_PREVIEW_SIZE = GL_SIZE_LIMIT / 2;
34
35    private int mTileSize;
36    private int mPreviewSize;
37    private Drawable mDrawable;
38    private BitmapTexture mPreview;
39
40    public DrawableTileSource(Context context, Drawable d, int previewSize) {
41        mTileSize = TiledImageRenderer.suggestedTileSize(context);
42        mDrawable = d;
43        mPreviewSize = Math.min(previewSize, MAX_PREVIEW_SIZE);
44    }
45
46    @Override
47    public int getTileSize() {
48        return mTileSize;
49    }
50
51    @Override
52    public int getImageWidth() {
53        return mDrawable.getIntrinsicWidth();
54    }
55
56    @Override
57    public int getImageHeight() {
58        return mDrawable.getIntrinsicHeight();
59    }
60
61    @Override
62    public int getRotation() {
63        return 0;
64    }
65
66    @Override
67    public BasicTexture getPreview() {
68        if (mPreviewSize == 0) {
69            return null;
70        }
71        if (mPreview == null){
72            float width = getImageWidth();
73            float height = getImageHeight();
74            while (width > MAX_PREVIEW_SIZE || height > MAX_PREVIEW_SIZE) {
75                width /= 2;
76                height /= 2;
77            }
78            Bitmap b = Bitmap.createBitmap((int) width, (int) height, Bitmap.Config.ARGB_8888);
79            Canvas c = new Canvas(b);
80            mDrawable.setBounds(new Rect(0, 0, (int) width, (int) height));
81            mDrawable.draw(c);
82            c.setBitmap(null);
83            mPreview = new BitmapTexture(b);
84        }
85        return mPreview;
86    }
87
88    @Override
89    public Bitmap getTile(int level, int x, int y, Bitmap bitmap) {
90        int tileSize = getTileSize();
91        if (bitmap == null) {
92            bitmap = Bitmap.createBitmap(tileSize, tileSize, Bitmap.Config.ARGB_8888);
93        }
94        Canvas c = new Canvas(bitmap);
95        Rect bounds = new Rect(0, 0, getImageWidth(), getImageHeight());
96        bounds.offset(-x, -y);
97        mDrawable.setBounds(bounds);
98        mDrawable.draw(c);
99        c.setBitmap(null);
100        return bitmap;
101    }
102}
103