On 22 September 2023 19:37:52 UTC, Blady <blady-...@users.sf.net> wrote:
>
>> Le 20 sept. 2023 à 15:12, Jeffrey R. Carter via Gnoga-list
>> <gnoga-list@lists.sourceforge.net> a écrit :
>>
>> If I have a canvas, I can get a context for it with Get_Drawing_Context_2D
>> and do lots of things with that context. But there are operations that
>> change the canvas, such as changing the width or height, that I would think
>> would invalidate an existing context and require getting a new context. Am I
>> correct about this? If so, is there a list of operations that require this?
>
>Hello Jeff,
>
>The underlying behavior is given by Javascript.
>As I'm not a specialist, I look at the documentation:
>https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/getContext
>
>It says:
>The HTMLCanvasElement.getContext() method returns a drawing context on the
>canvas, or null if the context identifier is not supported, or the canvas has
>already been set to a different context mode.
>Later calls to this method on the same canvas element, with the same
>contextTypeargument, will always return the same drawing context instance as
>was returned the first time the method was invoked. It is not possible to get
>a different drawing context object on a given canvas element.
>
>It seems that the context stay valid as it is unique.
>
>Regards, Pascal.
>https://blady.pagesperso-orange.fr
>
>
Interesting. Thanks for that information.
--
Jeff Carter
"Now go away or I shall taunt you a second time."
Monty Python and the Holy Grail
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