On Saturday, September 10, 2016 at 5:45:43 AM UTC-7, Matthew Flatt wrote:
> I think that means information about the source stream's alpha channel
> really is not available through the current interface. A pull request
> to add that would be welcome.
I've been looking through bitmap%'s definition
At Sat, 10 Sep 2016 01:10:53 -0700 (PDT), Lehi Toskin wrote:
> On Friday, September 9, 2016 at 7:45:32 PM UTC-7, Matthew Flatt wrote:
> > You could use 'unknown/mask, which should create a mask bitmap only if
> > the source stream has an alpha channel, but at the expense of parsing
> > the file an
On Friday, September 9, 2016 at 7:45:32 PM UTC-7, Matthew Flatt wrote:
> You could use 'unknown/mask, which should create a mask bitmap only if
> the source stream has an alpha channel, but at the expense of parsing
> the file an extra time.
Running `(read-bitmap img 'unknown/mask)` produces a bit
I don't think there's currently a way to make a loaded bitmap have an
alpha channel only if the source stream has one.
You could use 'unknown/mask, which should create a mask bitmap only if
the source stream has an alpha channel, but at the expense of parsing
the file an extra time.
At Fri, 9 Sep
Is there a way to detect if an image has a transparency/alpha channel? I've
been looking around and `(send bmp has-alpha-channel?)` really only works if
`bmp` has been loaded or created specifically with an alpha channel. What I
want to know is if a given path-string has such properties, not if
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