// Rotates the bitmap by the specified degree.
// If a new bitmap is created, the original bitmap is recycled.
public static Bitmap rotateAndCrop(Bitmap b, int degrees, Rect crop) {
if (b == null) return b;
Bitmap b2 = null;
int scale = Util.scalePow2(b.getHeight(), b.getWidth());
if (scale != 1 && crop != null) {
crop.left *= scale;
crop.right *= scale;
crop.bottom *= scale;
crop.top *= scale;
}
try {
if (degrees != 0) {
Matrix m = new Matrix();
m.setRotate(degrees, 0, 0);
RectF r_rot = new RectF(0, 0, b.getWidth(), b.getHeight());
m.mapRect(r_rot);
m.postTranslate(-r_rot.left, -r_rot.top);
// r_rot.set(0,0,b.getWidth(),b.getHeight());
// m.mapRect(r_rot);
// Log.d(TAG, "rotated bitmap = "+r_rot.toString());
if (crop == null) b2 = Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), m, true);
else {
Matrix minv = new Matrix();
m.invert(minv);
// minv.postScale(scale, scale);
RectF r = new RectF();
r.set(crop);
minv.mapRect(r);
Log.d(TAG, "crop = " + crop.toString());
r.round(crop);
Log.d(TAG, "bitmap " + b.getDensity() + " " + b.getWidth() + " x " + b.getHeight());
Log.d(TAG, "inv rotated crop = " + crop.toString());
b2 = Bitmap.createBitmap(b, crop.left, crop.top, crop.width(), crop.height(), m, true);
}
} else {
if (crop != null) {
Log.d(TAG, "crop = " + crop.toString());
Log.d(TAG, "bitmap " + b.getDensity() + " " + b.getWidth() + " x " + b.getHeight());
b2 = Bitmap.createBitmap(b, crop.left, crop.top, crop.width(), crop.height());
// b2 = Bitmap.createBitmap(b, scale*crop.left, scale*crop.top,
// scale*crop.width(), scale*crop.height());
} else b2 = b;
}
} catch (OutOfMemoryError ex) {
// We have no memory to rotate. Return the original bitmap.
b2 = b;
}
Assert.assertNotNull(b2);
if (b == b2) {
return b;
} else {
Log.d(TAG, "b != b2, recycling b");
b.recycle();
return b2;
}
}
/**
* Register a HotSpot that should fire a listener when a touch event occurs that intersects the
* Region defined by the HotSpot.
*
* <p>The HotSpot virtually moves and scales with the TileView.
*
* @param positions (List<double[]>) List of paired doubles that represents the region.
* @return HotSpot the hotspot created with this method.
*/
public HotSpot addHotSpot(List<double[]> positions, HotSpot.HotSpotTapListener listener) {
Path path = mCoordinateTranslater.pathFromPositions(positions, true);
RectF bounds = new RectF();
path.computeBounds(bounds, true);
Rect rect = new Rect();
bounds.round(rect);
Region clip = new Region(rect);
HotSpot hotSpot = new HotSpot();
hotSpot.setPath(path, clip);
hotSpot.setHotSpotTapListener(listener);
return addHotSpot(hotSpot);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
if (angleChanged) {
final RectF layoutRect = tempRectF1;
final RectF layoutRectRotated = tempRectF2;
layoutRect.set(0, 0, r - l, b - t);
rotateMatrix.setRotate(angle, layoutRect.centerX(), layoutRect.centerY());
rotateMatrix.mapRect(layoutRectRotated, layoutRect);
layoutRectRotated.round(viewRectRotated);
angleChanged = false;
}
final View view = getView();
if (view != null) {
view.layout(
viewRectRotated.left, viewRectRotated.top, viewRectRotated.right, viewRectRotated.bottom);
}
}
/** @return the bounds where the image was drawn. */
public Rect getBitmapBounds() {
updateDstRectF();
Rect rect = new Rect();
mDstRectF.round(rect);
return rect;
}