Scaling and Masking a bitmap

Question

I would like to show a Bitmap in 2 format, "small icons" and  "large icons".

I have to scale and to apply a mask to both formats. How can I do that? Can you help me?

Regards,

Marco

Answer 1

Hi Marco,

there are many options to scale a bitmap. You can use two sets of icons (which requires more memory but results in best performance), you can use bitmaps and apply a warp operation or you can use SVGs...

It depends on the use case. If you provide more information, it might be easier to help you.

Best regards,

Manfred.

Comments

Hi Manfred,

I would like to scale and mask a bitmap at the same time, as FilterImage does, but it does not scale the bitmap.  As an example, the mask might be a filled Circle, a filled rounded rectangle and their negatives.

Regards,

Marco

Answer 2

Hello Marco,

you will need to perform the scale and filter operation one after another with an intermediate bitmap to store the results between the both steps. Since scaling and filtering are both CPU and RAM intensive operations, I would recommend to use prepared bitmap resources with already scaled/filtered contents wherever it is possible.

Best regards

Paul Banach