Creating a Cropped bitmap without creating a new bitmap

Asked Jun 15 '21 at 19:17

Active Jun 15 '21 at 21:03

Viewed 85 times

I need to figure out a way to get a bitmap cropped without creating another bitmap that is already present.

I have two bitmaps

int width = 50;
int height = 50;

//Bitmap A
bitmapA = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
bitmapA.copyPixelsFromBuffer(buffer);

//Bitmap B
bitmapB = Bitmap.createBitmap(45, 45, Bitmap.Config.ARGB_8888);

bitmapA has an image data, while bitmapB has no image data. I need a cropped image of bitmapA starting from (5, 5) and put it into bitmapB without creating another new Bitmap.

While I can do

bitmapC = Bitmap.createBitmap(bitmapA, 5, 5, 45, 45);

this will create another Bitmap object. I need to copy the data of bitmapA into the already created bitmapB without creating another Bitmap / calling createBitmap

Can this be done by using Rect?

Any ideas? thanks.

edited Jun 15 '21 at 21:03

asked Jun 15 '21 at 19:17

Jack Smother

`bitmapC = ....` change to `bitmapB = ....` – blackapps Jun 15 '21 at 19:27
that is creating another bitmap – Jack Smother Jun 15 '21 at 19:57
No. You had already bitmapB. Otherwise make it `bitmapA = ...` – blackapps Jun 15 '21 at 20:22
1

I think you are talking about variables, I'm talking about new bitmap objects being allocated in the memory. – Jack Smother Jun 15 '21 at 21:05

Creating a Cropped bitmap without creating a new bitmap

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