On Fri, May 16, 2014 at 3:06 PM, Justin Novosad <ju...@google.com> wrote:

> On Fri, May 16, 2014 at 5:42 PM, Rik Cabanier <caban...@gmail.com> wrote:
>
>>
>> Is the Web page not composited in sRGB? If so, it seems the backing store
>> should be sRGB too.
>>
>>
>
> The web page is not composited in sRGB. It is composited in the output
> device's color space, which is often sRGB or close to sRGB, but not always.
> A notable significant exception is pre Snow Leopard Macs that use a gamma
> 1.8 transfer curve.
> By the way, sniffing the display color profile through getImageData is a
> known fingerprinting technique. This factor alone can be sufficient to
> fingerprint a user who has a calibrated monitor.
>

I'm unable to reproduce what you're describing. So, if I fill with a color
and repeatedly do a getImageData/putImageData, should I see color shifts?

Reply via email to