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Re: "Images must be in PNG format"

From: Dirk Schulze <dschulze@adobe.com>
Date: Wed, 18 Apr 2012 13:56:17 -0700
To: fantasai <fantasai.lists@inkedblade.net>
CC: "public-css-testsuite@w3.org" <public-css-testsuite@w3.org>
Message-ID: <147A42DC-9B60-4B1F-B6B9-7E2F5BEF68AC@adobe.com>

On Apr 18, 2012, at 11:57 AM, fantasai wrote:

> On 04/18/2012 10:04 AM, Chris Lilley wrote:
>> On Wednesday, April 18, 2012, 6:54:22 PM, Dirk wrote:
>> 
>> DS>  Hi,
>> 
>> DS>  I just saw that the Wiki for creating ref tests says: "Images
>> DS>  must be in PNG format."[1]. Can we be less strict here and allow
>> DS>  for instance SVG files as images as well?
>> 
>> This is clearly needed, since some tests require a non-raster image whose size etc depends on the computation of viewports.
>> 
>> And there are already tests that use SVG.
> 
> Yes, SVG should be allowed. But only where a vector image is needed, as
> not all CSS implementations support SVG.
This is a vague definition :( For instance what about a test like this: http://hg.csswg.org/test/file/tip/contributors/aryehgregor/submitted/transform-background-005.html/

The test itself has nothing to do with SVG and it uses the flag SVG. Should it use a PNG instead?

Dirk

PS: I am always for using SVG as a replacement for bitmapped images where possible. So don't necessarily take my voice into account. :)

> 
>> I suspect the restriction was to stop people unadvisedly using JPEG for sharp-edged raster images? If so, it should say that explicitly.
> 
> We're not testing image formats here, so we picked one that was widely
> supported and had what we needed (e.g. sharp edges, transparency).
> There are non-browser implementations that use the CSS test suites;
> "there's cross-browser support" and "I feel like it" is not reason enough
> to allow other choices.
> 
> The tools do some image-format munging in the XHTML for Printers output,
> and could do so for other output formats as well if there are markets
> that need a version of the test suite using e.g. GIF.
> 
> ~fantasai
> 
Received on Wednesday, 18 April 2012 20:56:50 GMT

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