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media: Center-cropping media bitmaps to improve quality

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applying ImageView's CenterCrop style of cropping to media bitmap

Change-Id: I219142f5c9addbbfc08bfda0d23c8e3f71139139
Signed-off-by: rmp22 <195054967+rmp22@users.noreply.github.com>
This commit is contained in:
rmp22
2025-11-27 16:46:15 +08:00
committed by Ghosuto
parent 087ee89b80
commit 328c575818
1 changed files with 22 additions and 7 deletions
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29
media/java/android/media/MediaMetadata.java
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@@ -22,6 +22,9 @@ import android.compat.annotation.UnsupportedAppUsage;
import android.content.ContentResolver;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.media.browse.MediaBrowser;
import android.media.session.MediaController;
import android.media.session.MediaSession;
@@ -976,13 +979,25 @@ public final class MediaMetadata implements Parcelable {
}
private Bitmap scaleBitmap(Bitmap bmp, int maxDimension) {
float maxDimensionF = maxDimension;
float widthScale = maxDimensionF / bmp.getWidth();
float heightScale = maxDimensionF / bmp.getHeight();
float scale = Math.min(widthScale, heightScale);
int height = (int) (bmp.getHeight() * scale);
int width = (int) (bmp.getWidth() * scale);
return Bitmap.createScaledBitmap(bmp, width, height, true);
if (bmp == null) return null;
int srcWidth = bmp.getWidth();
int srcHeight = bmp.getHeight();
float scale = Math.max(
(float) maxDimension / srcWidth,
(float) maxDimension / srcHeight
);
float scaledWidth = scale * srcWidth;
float scaledHeight = scale * srcHeight;
float dx = (maxDimension - scaledWidth) / 2f;
float dy = (maxDimension - scaledHeight) / 2f;
Bitmap output = Bitmap.createBitmap(maxDimension, maxDimension, bmp.getConfig());
Canvas canvas = new Canvas(output);
Matrix matrix = new Matrix();
matrix.setScale(scale, scale);
matrix.postTranslate(dx, dy);
Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG);
canvas.drawBitmap(bmp, matrix, paint);
return output;
}
}
}