Support for data uri (base64) in @image-url about slint

[hunger]

@akshatvishu Of course you can work on this :-) Feel free to drop by in chat.slint.dev if you have questions! That usually works faster than raising an issue for everything:-)

[ogoffart]

Thanks for your suggestion. I edited the title and description to make it more actionable as an issue in our issue tracker.
To answer the original question: this is not implemented right now.

[ogoffart]

This should be fairly easy to implement.

In the resolving pass, we can detect such URL and store a ImageReference::EmbeddedData instead of ImageReference::AbsolutePath, around here

slint/internal/compiler/passes/resolving.rs

Line 401 in 26c7e08

resource_ref: ImageReference::AbsolutePath(absolute_source_path),

[learncodingforweb]

Image {
  source: @image-url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==");
}

Compiling slint_redis_camera_view v0.1.0
error: failed to run custom build command for slint_redis_camera_view v0.1.0

Caused by:
process didn't exit successfully: target/debug/build/slint_redis_camera_view-ffd86284a8902f59/build-script-build (exit status: 101)
--- stderr
error: Cannot find image file data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==
--> ui/app.slint:24:21
|
24 | source: @image-url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==");
| ^

thread 'main' panicked at build.rs:2:42:
called Result::unwrap() on an Err value: CompileError(["ui/app.slint:24: Cannot find image file data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="])
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
[Finished running. Exit status: 101]

Cargo.toml

[build-dependencies]
slint-build="1.5"


[dependencies]
slint = "1.5"

[ogoffart]

yes of course, this is not yet implemented yet. This is why the issue is tagged as "enhancement" (this is a feature request)

[akshatvishu]

yes of course, this is not yet implemented yet. This is why the issue is tagged as "enhancement" (this is a feature request)

Can i work on this?

[ogoffart]

@akshatvishu , sure, thank you.