1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
package com.android.gallery3d.filtershow.filters;
import java.nio.ByteBuffer;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
public class ImageFilterStraighten extends ImageFilter {
private Bitmap.Config mConfig = Bitmap.Config.ARGB_8888;
private float mRotation;
private float mZoomFactor;
public ImageFilterStraighten() {
mName = "Straighten";
}
@Override
public ImageFilter clone() throws CloneNotSupportedException {
ImageFilterStraighten filter = (ImageFilterStraighten) super.clone();
filter.mRotation = mRotation;
filter.mZoomFactor = mZoomFactor;
return filter;
}
public ImageFilterStraighten(float rotation, float zoomFactor) {
mRotation = rotation;
mZoomFactor = zoomFactor;
}
public void setRotation(float rotation) {
mRotation = rotation;
}
public void setRotationZoomFactor(float zoomFactor) {
mZoomFactor = zoomFactor;
}
public void apply(Bitmap bitmap) {
// TODO: implement bilinear or bicubic here... for now, just use
// canvas to do a simple implementation...
// TODO: and be more memory efficient! (do it in native?)
Bitmap temp = bitmap.copy(mConfig, true);
Canvas canvas = new Canvas(temp);
canvas.save();
Rect bounds = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
float w = temp.getWidth();
float h = temp.getHeight();
float mw = temp.getWidth() / 2.0f;
float mh = temp.getHeight() / 2.0f;
canvas.scale(mZoomFactor, mZoomFactor, mw, mh);
canvas.rotate(mRotation, mw, mh);
canvas.drawBitmap(bitmap, bounds, bounds, new Paint());
canvas.restore();
int[] pixels = new int[(int) (w * h)];
temp.getPixels(pixels, 0, (int) w, 0, 0, (int) w, (int) h);
bitmap.setPixels(pixels, 0, (int) w, 0, 0, (int) w, (int) h);
temp.recycle();
temp = null;
pixels = null;
}
}
|