Bitmap - generating on the fly in nodejs javascript - bitmap 64x32 with 1 till 4 lines with autosize

[yboujraf]

Dear @jhuckaby

I hope you are very well in this moment and my best wishes for 2020, health and $$$$ ;-)

I am back to you regarding your repository. Nice job.

I am controlling some bitmap push button and need to generate on the fly a bitmap array each time a value parameter changed.

Bitmap structure of the push button is :

Size 64x32
Color 1 bit (Black : 0xFF, white : 0x00)
pixels are on top right corner.
And if you see the picture above, I need to reverse the bits.

Use case 1 . generating bitmap array of byte (here 256 bytes) with 1 till 4 lines

• with possible auto size, position (x,y) ,wrap, space between lines, ... and be possible to invert for each line separately the background .

Use case 2 : generating bitmap array from a picture loaded from file bmp, png, jpeg, ... and generate the bitmap array as specified above with resige to 64x32 if possible keeping aspect ratio.

I appreciate if you could help me for this purpose or route me to to the correct way.

My Best Wishses for your family and enjoy live
Youssef

[jhuckaby]

Hello there. I'm very sorry, but what you are asking is entirely beyond the capabilities of this library. CanvasPlus is merely a wrapper around the HTML5 Canvas object, adding some high-level features. What you need, I think, is a low-level image library that gives you access to the raw bytes. Maybe try something like Sharp?

Good luck, and sorry!

[yboujraf]

Dear @jhuckaby

Thanks for the share.

I did it and I cross my fingers.

Best Regards
Youssef