When is support ALPHA images planned?

Feature requests
1

What do you want to achieve?

Use LV_IMG_CF_ALPHA_1/2/4/8BIT Only stores the Alpha value on 1, 2, 4 or 8 bits.

Do you see alternative options and workaround to achieve it?

Now i can place true color and manualy replace generte dc file

Mention some use cases

many

2

To realize it we need a new image asset editor, but unfortunately it can’t fit into the next release. I will check if we can add it to the one after that.

3

I mean isnt editor issue. Only need file format define , that will be converted to ALPHA. Converter need detect it. Maybe works now if actual converter have somethink prebuild?

4

Maybe show me part of Squareline image exporter code and i add some lines to detect alpha only images and export it right.

5

SLS now support only PNG and unless I miss something PNG doesn’t support alpha only. Could you send an example alpha only PNG image?

6

aonly01
One example count used colors return 1 and filled is only alpha channel.
This ofcourse require analyze full image before export, i write about simple method for example name file A8imagename A4imagename … and your export to c do it.

7

I’ve checked the PNG header here: PNG Header

It says it’s a has palette color type and not Alpha only. With palette the image can have any number of colors.

8

Aghhh kisve Alpha only dont exist, you need detect it by check all pixels RGB is same and ALPHA not. Then i write simpler is i user name file A8blahblah and you converter convert it into A8 only.