Error evaluating 'bitmapRepresentation.CGImage' after Sketch 86 update

Dara3

After Sketch update to v86, our plugin broke. The log says:

TypeError: null is not an object (evaluating 'bitmapRepresentation.CGImage')

Is it related to NSColorSpace? If so, I have NSColorSpace.sRGBColorSpace() in the project. What would be the replacement for:

let exporter = MSExporter.exporterForRequest_colorSpace(exportRequest, NSColorSpace.sRGBColorSpace())
const colorSpace = this.context.document.colorSpace()

kevgski

Aye, hope this helps:

As part of ongoing refactoring, we’re replacing usage of NSColorSpace with CGColorSpaceRef in our exporter code.

Changes

We’ve recently merged changes to the following internal methods to make them use the Core Graphics type:

-[MSExporter initWithRequest:colorSpace:rasterizeShadows:]
+[MSExporter exporterForRequest:colorSpace:rasterizeShadows:]
+[MSExporter exporterForRequest:colorSpace:]
+[MSExporter exporterForRequest:colorSpace:driver:]

Suggested Change
If you’ve been using these methods with an NSColorSpace parameter in the past, we suggest simply retrieving the associated CGColorSpaceRef from the NSColorSpace instance using its .CGColorSpace property:

https://developer.apple.com/documentation/appkit/nscolorspace/1412073-cgcolorspace?language=objc

Dara3

I tried but that reply didn't give a clear example so I did NSColorSpace.CGColorSpace and that resulted in Sketch crashing. There is no code completion at all so that doesn't help.

kevgski

Sorry, I don't have an updated copy of Sketch to test things out but if I were to guess the crash wasn't necessarily from accessing the CGColorSpace property but rather some method later on in your code.

There is no code completion at all so that doesn't help.

Yes unfortunately, that is the downside to trying to access Private Sketch Methods. It might be easier for you to use the documented JS API's Export methods: https://developer.sketch.com/reference/api/#export

Best of luck!

kevgski

One thing that I like doing is searching GitHub for example code.

https://github.com/search?o=desc&q=MSExporter&s=indexed&type=Code

You can see MSExporter being used here https://github.com/sketch-hq/SketchAPI/blob/7de5a6d77144ceb6bd4d9afd8cd16bace7451bc6/Source/dom/export.js#L139

kevgski

Looking at the JS API commits looks like the change is pretty straightforward though so I imagine something else is crashing your code

https://github.com/sketch-hq/SketchAPI/commit/7de5a6d77144ceb6bd4d9afd8cd16bace7451bc6#diff-40c4fdfe548f0b0f4fc46cc15d86d6b0ca0ee8e302c4106ae22f3b63c6d2b7ddR138