Anyone here worked on converting a Canvas to ImageBitmap and saving it in a Compose Multiplatform pr...

# multiplatform

[Javokhir Savriev]

Anyone here worked on converting a Canvas to ImageBitmap and saving it in a Compose Multiplatform project? Tips or code snippets would be a lifesaver! Thanks!

[Behzod]

Hey, @Javokhir Savriev

If I understand correctly, you can achieve this simply by using Canvas(imgBitmap).

On the other hand, if you want to convert a Painter drawn on a Canvas to an ImageBitmap, you can write it as follows:

fun Painter.toImageBitmap(width: Int, height: Int): ImageBitmap {
    val imgBitmap = ImageBitmap(width, height)

    Canvas(imgBitmap).apply {
        CanvasDrawScope().draw(
            density = Density(1f, 1f),
            layoutDirection = LayoutDirection.Ltr,
            canvas = imgBitmap,
            size = Size(width.toFloat(), height.toFloat())
        )
    }

    return imgBitmap
}

For saving, you can check the implementation of Coil or Kamel libraries.

[Javokhir Savriev]

I have a Canvas in my Compose project that allows users to draw lines using drawLine. Now, I’m looking for a way to capture and save the content of this Canvas. Any tips or examples on how to efficiently capture the drawn lines and possibly save them as an image? Your insights would be really helpful!
Thanks!

[Javokhir Savriev]

Screenshot 2024-01-26 at 21.20.50.png

[Javokhir Savriev]

2024-01-26 21.25.42.jpg

[Muhammad hosein Merati]

hi,
did you get your answer?

[Javokhir Savriev]

No

[Muhammad hosein Merati]

i have same problem, i want just use a icon in DrawImage of Canvas and i can't,
icons are ImageVectoer and DrawImage wants ImageBitmap, i don't know what should i do