Due to the limited floating point precision, and konva's `scale` properties, it is possible for the relative rect of an object to have non-integer coordinates and dimensions.
When we go to rasterize and otherwise export images, the HTML canvas API truncates these numbers.
So, we can end up with situations where the relative width and height of a layer are very close to the "real" value, but slightly off.
For example, width and height might be 512px, but the relative rect is calculated to be something like 512.000000003 or 511.9999999997.
In the first case, the truncation results in 512x512 for the dimensions - which is correct. But in the second case, it results in 511x511!
One place where this causes issues is the image action `New Canvas from image -> As Raster Layer (resize)`. For certain input image sizes, this results in an incorrectly resized image. For example, a 1496x1946 input image is resized to 511x511 pixels when the bbox is 512x512.
To fix this, we can round both coords and dimensions of rects when rasterizing.
I've thought through the implications and done some testing. I believe this change will not cause any regressions and only fix edge cases. But, it's possible that something was inadvertently relying on the old behavior.
- Ensure the currently-rasterizing adapter is reset to `null` on success or failure of a rasterization operation. In case of failure, this prevents the UI from getting stuck with a disabled Invoke button and tooltip message "Canvas is busy (rasterizing)".
- Log the error if there is one.
A redux selector is used to get the "default" IP Adapter. The selector uses the model list query result to select an IP Adapter model to be preset by default.
The selector is memoized, so if we mutate the returned default IP Adapter state, it mutates the result of the selector for all consumers.
For example, the `image` property of the default IP Adapter selector result is `null`. When we set the `image` property of the selector result while creating an IP Adapter, this does not trigger the selector to recompute its result. We end up setting the image for the selector result directly, and all other consumers now have that same image set.
Solution - we need to clone the selector result everywhere it is used. This was missed in a few spots, causing the issue.
It was easy to misunderstand the empty state for a regional guidance reference image. There was no label, so it seemed like it was the whole region that was empty.
This small change adds the "Reference Image" heading to the empty state, so it's clear that the empty state messaging refers to this reference image, not the whole regional guidance layer.
These helpers consolidate layer validation checks. For example, checking that the layer has content drawn, is compatible with the selected main model, has valid reference images, etc.
