- From: Alan Stearns <stearns@adobe.com>
- Date: Fri, 13 Sep 2013 07:37:58 -0700
- To: Dirk Schulze <dschulze@adobe.com>
- CC: "public-fx@w3.org" <public-fx@w3.org>
On 9/13/13 4:23 PM, "Dirk Schulze" <dschulze@adobe.com> wrote: > >> >> The last paragraph of 5.11.1 needs an "or the luminance..." clause. > >I am unsure what you mean here. The whole section handles the two cases >for mask-source: alpha masking and luminance masking. Alpha masking is >the second paragraph, luminance are the following paragraphs. The last >paragraphs just give a guidance on how to proceed with different kind of >image sources like single channel image, three channel images and so on. >The last paragraph says that the effect of masking is as if you would >multiple the alpha channel of your content with the mask value (luminance >or alpha value dependent on the masking operation you chose). Ah, I was wrong, and the sentence in the spec is correct. I was flipping the two sources in my misreading. > >> >> It may be better to duplicate the appropriate descriptions of values and >> other explanations of the mask-box-image-source property that are >> applicable from the mask-source property. > >The mask-source property just applies to <mask> elements. It had no >relation to any of the other properties. Sorry - I meant the mask-image property. The mask-box-image-source property allows 'none' or <image>. There is no text below that says what the various kinds of <image> mean for the property (though if you're using the oldest reference, you probably just need the one <image> entry). And it has the same stacking context text as mask-image, but what happens in an image loading failure is different. If the value of mask-box-image-source points to an empty image, does the mask still occur? I was thinking it would be best for the mask-image and mask-box-image-source descriptions to be as similar as possible. Thanks, Alan
Received on Friday, 13 September 2013 14:38:25 UTC