narayana/conversations-classic
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only look at inner 70% to calculate overlay

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This commit is contained in:
Daniel Gultsch 2018-07-01 12:06:09 +02:00
parent c07a019433
commit 49d5c1eb52
1 changed files with 6 additions and 2 deletions
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8
src/main/java/eu/siacs/conversations/persistance/FileBackend.java
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@ -71,6 +71,8 @@ public class FileBackend {
private XmppConnectionService mXmppConnectionService;
private static final float IGNORE_PADDING = 0.15f;
public FileBackend(XmppConnectionService service) {
this.mXmppConnectionService = service;
}
@ -710,9 +712,11 @@ public class FileBackend {
* https://stackoverflow.com/a/3943023/210897
*/
private boolean paintOverlayBlack(final Bitmap bitmap) {
final int h = bitmap.getHeight();
final int w = bitmap.getWidth();
int record = 0;
for (int y = 0; y < bitmap.getHeight(); ++y) {
for (int x = 0; x < bitmap.getWidth(); ++x) {
for (int y = Math.round(h * IGNORE_PADDING); y < h - Math.round(h * IGNORE_PADDING); ++y) {
for (int x = Math.round(w * IGNORE_PADDING); x < w - Math.round(w * IGNORE_PADDING); ++x) {
int pixel = bitmap.getPixel(x, y);
if ((Color.red(pixel) * 0.299 + Color.green(pixel) * 0.587 + Color.blue(pixel) * 0.114) > 186) {
--record;