Hi Team, I’m making the cluster of labels like: - annotationCluster.entities.add({ position: Cesium.Cartesian3.fromDegrees(x, y), label: { text: lbl, font: “14px Helvetica”, fillColor: Cesium.Color.WHITE, outlineColor: Cesium.Color.CYAN, outlineWidth: .5, opacity: 1, style: Cesium.LabelSt…

Hi Shashi, Have you resolved the issue? seems i encountered the same, Thanks & Regards, Martin.

@ipk_app Not yet waiting for the Cesium Team response.

@ipk_app On the other sources i’ve found HTML Standard help but it’s need to change into the cesium.js.

Hi there, Looks like willReadFrequently was officially added to the canvas API earlier this year . Based on discussion around this feature , heuristics for when this feature is helpful are imprecise, which is why this is a console warning. I would suggest investigating whether this does provide a …

I saw the other post too, and was wondering what “readback” operations Cesium performs against WebGL. In the example in the first post, I noticed that the entity collection is called “cluster”, and it occurred to me that clustering uses GL-backed collision detection (?) – maybe this issue only occu…

@Gabby_Getz Thanks for providing the reference i went through that, but in which version it’s added and how we can implement it, in our code using Cesium.js not mentioned properly, and i’ve not found any reference about it in cesium help section pls do update if u have any. Thanks

In our project with Cesium, the console messages start to appear in the initialization phase, before any of our own data is added to the map. So I have to assume that the basic functionality of displaying a map already does a number of Canvas2D reads. Maybe one of the core developers can shine a li…

Do you get the error on every Cesium page? I just opened the default Sandcastle example and I’m not seeing the errors mentioned in the OP. (Chrome 106, Windows) ETA: I was able to get one of these errors in Edge 106, but it’s definitely spurious – it traces back to a feature detection function (R…

@markchagers If your are using online Cesium.js you can’t. If you are using locally or you have your own Cesium.js library you need to change given code .getContext(‘2d’, {willReadFrequently: true}) everywhere in Cesium.js library.

Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true

CesiumJS

markchagers October 11, 2022, 9:06am 5

see this issue too (spoiler: it may not be a good idea to change it):

Topic		Replies	Views
How to eliminate cesium warning Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true CesiumJS	2	5911	October 11, 2022
.js willReadFrequently CesiumJS	2	154	July 4, 2024
What do you want to see from Cesium in 2019? CesiumJS	91	1480	December 22, 2019
What would you like to see in CesiumJS? CesiumJS	35	3001	February 22, 2024
What would you like to see in CesiumJS in 2025? CesiumJS	24	1330	July 22, 2025

Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true

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