Re: [EXTERNAL] Re: Canvas Floating Point Color Values Propoal

Thanks -- those are covered by CSS Color Level 4's definition
<https://www.w3.org/TR/css-color-4/#predefined-sRGB>, which is linked in
the canvas spec. But, I'll add a remark putting together that connection in
the document.

On Thu, Nov 10, 2022 at 6:25 PM Lars Borg <borg@adobe.com> wrote:

> Does that apply? Uint8 would only support the unit range.
> So maybe the floats would get clipped?
>
> Lars
>
> -----Original Message-----
> From: Reiner Fink <reinerf@microsoft.com>
> Date: Thursday, November 10, 2022 at 7:16 AM
> To: Christopher Cameron <ccameron@google.com>, Lars Borg <borg@adobe.com>
> Cc: Ken Russell <kbr@google.com>, "public-colorweb@w3.org" <
> public-colorweb@w3.org>
> Subject: RE: [EXTERNAL] Re: Canvas Floating Point Color Values Propoal
>
> EXTERNAL: Use caution when clicking on links or opening attachments.
>
>
> You might want to mention how to resolve gamma for values >1.0 and <0.0,
> eg something about extending curves and reflecting gamma about y-axis.
>
> -reiner
>
> From: Christopher Cameron <ccameron@google.com>
> Sent: Thursday, November 10, 2022 6:34 AM
> To: Lars Borg <borg@adobe.com>
> Cc: Ken Russell <kbr@google.com>; public-colorweb@w3.org
> Subject: [EXTERNAL] Re: Canvas Floating Point Color Values Propoal
>
> Thanks!
>
> I've created a PR incorporating this feedback, and also fixing a couple of
> inconsistencies at
>
> https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2FColorWeb-CG%2Fpull%2F85&amp;data=05%7C01%7Cborg%40adobe.com%7Ce4f7137b602d447f8fa308dac33f4a5a%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C638036973867549789%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=yoD92G0l59OcIJWW0nd0fN7NsdTPod70KyuzpIOc8Zs%3D&amp;reserved=0
>
> In particular, I was inconsistent about using "unorm8" versus
> "uint8Clamped" for ImageData. I also changed ImageDataSettings to use
> "dataType" instead of "colorType", since we are specifying the type for
> ImageData's data member (BTW, would it better to use the full names of the
> type "Uint8ClampedArray" and "Float32Array", rather than the abbreviated
> "uint8Clamped" and "float32").
>
> Let me know of any further feedback here or on the PR.
>
>
> On Wed, Nov 9, 2022 at 2:54 AM Lars Borg <mailto:borg@adobe.com> wrote:
> Needs statements about conversion between unorm8 and float16
> representations.
> I assume such conversions will be needed.
>
> Also, spell out that the float16 encoding is as per IEEE?
>
> Lars
>
> From: Ken Russell <mailto:kbr@google.com>
> Date: Tuesday, November 8, 2022 at 2:57 PM
> To: Christopher Cameron <mailto:ccameron@google.com>
> Cc: "mailto:public-colorweb@w3.org" <mailto:public-colorweb@w3.org>
> Subject: Re: Canvas Floating Point Color Values Propoal
> Resent-From: <mailto:public-colorweb@w3.org>
> Resent-Date: Tuesday, November 8, 2022 at 2:57 PM
>
> EXTERNAL: Use caution when clicking on links or opening attachments.
>
> Looks great to me!
>
>
> On Tue, Nov 8, 2022 at 5:47 AM Christopher Cameron <mailto:
> ccameron@google.com> wrote:
> As discussed in the previous call, I've separated floating point pixel
> values from HDR canvas capabilities.
>
> The following document is that proposal.
>
> https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fw3c%2FColorWeb-CG%2Fblob%2Fmaster%2Fcanvas_float.md&amp;data=05%7C01%7Cborg%40adobe.com%7Ce4f7137b602d447f8fa308dac33f4a5a%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C638036973867549789%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=Aekkng0xasOSgAC%2FO%2F8rbIfxO7HlzTOqXCU8UOcLXeU%3D&amp;reserved=0
>
> Please provide any feedback you have on the proposal. I will be trying to
> get this landed in the HTML spec first, and then introduce the HDR canvas
> proposal separately.
>
>
>
>
> --
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>
>