Re: The Trunk: Graphics-eem.529.mcz

I feel fairly sure that this was a NuScratch innovation and that there was code to do just this.

> On Jun 12, 2026, at 10:15 AM, Christoph Thiede via Squeak-dev <[email protected]> wrote:
> 
> Hi Eliot,
> 
> I'm curious, why does Form>>#pixelValueAt:put: not use this new primitive? :-)
> 
> Best,
> Christoph
> 
> -- 
> Sent from Squeak Inbox Talk
> 
> On 2022-07-26T18:58:30+00:00, [email protected] wrote:
> 
> Eliot Miranda uploaded a new version of Graphics to project The Trunk:
> http://source.squeak.org/trunk/Graphics-eem.529.mcz
> 
> ==================== Summary ====================
> 
> Name: Graphics-eem.529
> Author: eem
> Time: 26 July 2022, 11:58:24.028857 am
> UUID: e9d779b9-578e-4eea-9d2a-b68fffc5c366
> Ancestors: Graphics-mt.528
> 
> Add the new primitivePixelValueAtPut primitive, which is included in 6.x VMs.
> 
> =============== Diff against Graphics-mt.528 ===============
> 
> Item was added:
> + ----- Method: Form>>primPixelValueAtX:y:put: (in category 'pixel access') -----
> + primPixelValueAtX: x y: y put: pixelValue
> +     "Set the raw pixel value at the given point. Answer the previous value of the pixel.
> +      This pixel value depends on the receiver's depth. Typical clients use colorAt: to get a Color. Make sure the colorMap is nil for ColorForms "
> + 
> +     <primitive: 'primitivePixelValueAtPut' module:'BitBltPlugin' error: ec>
> +     | oldValue |
> +     oldValue := self primPixelValueAtX: x y: y.
> +     (BitBlt bitPokerToForm: self) pixelAt: x(a)y put: pixelValue.
> +     ^oldValue!Squeak-dev mailing list -- [email protected]
> To unsubscribe send an email to [email protected]



tim
--
tim Rowledge; [email protected]; http://www.rowledge.org/tim
The colder the X-ray table, the more of your body is required on it.


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