Question

I want to paint a Bitmap scaled in a canvas (based on the Bitmap and the View size). The problem is that if I scale the canvas before painting the bitmap:

 canvas.scale(1.5f,1.5f);
 canvas.drawBitmap(mBitmap, 0, 0, paint);

This is the result:

But if instead of scaling the canvas I scale the bitmap:

Bitmap scaled = Bitmap.createScaledBitmap(
        mBitmap, bitmapWidth, bitmapHeight,
        true);
canvas.drawBitmap(scaledBitmap, 0, 0, paint);

The result is much better:

The problem is that the Bitmap is pretty big and having in memory both the original and the scaled bitmap may be problematic.

Is there any way to obtain the second result without creating a scaled Bitmap every time the Bitmap or the View bounds changes?

Answer 1

The solution to my problem was that the Paint hasn’t enabled the FILTER_BITMAP_FLAG flag.