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Code Issues 1 Packages Projects Releases Wiki Activity

ATC_BLE_OEPL: Keep aspect ratio when scaling

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This commit is contained in:
Andreas Shimokawa
2025-07-05 15:13:01 +02:00
parent 443594db8c
commit 165a78f99c
1 changed files with 29 additions and 1 deletions
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app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/atcbleoepl/ATCBLEOEPLDeviceSupport.java
+29 -1
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@@ -22,7 +22,9 @@ import android.bluetooth.BluetoothGattCharacteristic;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.net.Uri;
import android.provider.MediaStore;
@@ -343,10 +345,36 @@ public class ATCBLEOEPLDeviceSupport extends AbstractBTLESingleDeviceSupport {
}
Bitmap bitmap = MediaStore.Images.Media.getBitmap(GBApplication.getContext().getContentResolver(), uri);
int src_width = bitmap.getWidth();
int src_height = bitmap.getHeight();
float src_aspect = (float) src_width / src_height;
float dst_aspect = (float) epaper_width / epaper_height;
int dst_height;
int dst_width;
if (dst_aspect > src_aspect) {
// scale to height
dst_height = epaper_height;
dst_width = (int) (epaper_height * src_aspect);
} else {
// scale to width
dst_width = epaper_width;
dst_height = (int) (epaper_width * src_aspect);
}
final Bitmap bmpResized = Bitmap.createBitmap(epaper_width, epaper_height, Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bmpResized);
final Rect rect = new Rect(0, 0, epaper_width, epaper_height);
// FIXME: make rotation optional
canvas.rotate(180, canvas.getWidth() / 2.0f, canvas.getHeight() / 2.0f);
// Fill background white
Paint paint = new Paint();
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.WHITE);
canvas.drawRect(0, 0, epaper_width, epaper_height, paint);
// Draw centered
final Rect rect = new Rect((epaper_width - dst_width) / 2, (epaper_height - dst_height) / 2, epaper_width - (epaper_width - dst_width) / 2, epaper_height - (epaper_height - dst_height) / 2);
canvas.drawBitmap(bitmap, null, rect, null);
Matrix matrix = new Matrix();
matrix.postRotate(180);