What about mix-blend?

[receiver1]

Hi everyone! I would like to see a "mix-blend" function for Image in Slint. It shouldn't be a difficult task, because it's enough to do the same "colorize", but with a small modification. For example, a "mix-blend: lighten" can be done like this +/-:

return Color {
  red: Math.max(parent.color.r, pixel.red),
  green: Math.max(parent.color.g, pixel.green),
  blue: Math.max(parent.color.b, pixel.blue),
  alpha: pixel.alpha
};

Or use the graphics API directly, most of them provide blend overlay state.

[tronical]

Interesting idea. So this would deprecate colorize and replace it with mix-blend? What would you use as the name of the property to specify the pixel? blend-color?

[receiver1]

No, it’s not replacement of “colorize”. When “colorize” set colour of each pixel in image, “mix-blend” would work like in CSS, to mix current image and background colours. There are many situations when image background colour and application background colour little different, so you need to mix image pixels with background colour. As example I works with GIF with bg color #080808 and app bg color is #090909. I don’t have sources of this GIF, so i can’t edit it background directly, and having “mix-blend” was very helpful in my situation. In CSS I can equals gif bg to page bg with “mix-blend: lighten”.