[haiku-bugs] Re: [Haiku] #7371: [OpenGL] reduce window width
- From: "yourpalal" <trac@xxxxxxxxxxxx>
- Date: Mon, 21 Nov 2011 19:14:43 -0000
#7371: [OpenGL] reduce window width
---------------------------+----------------------------
Reporter: diver | Owner: nobody
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Preferences | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by yourpalal):
Replying to [comment:4 anevilyak]:
> Replying to [comment:3 yourpalal]:
> > I like moving the logo down, and adding the stripe, which seems to be
a theme in the Haiku UI nowadays ;) It's worth noting that the logo.png
file used appears to have a white background (viewing it in Github, at
least), so that will have to be worked around. I'm not sure if BView
supports color-keyed alpha while drawing, but if it does, that would work
nicely.
>
> If I understand your intent correctly, it does, c.f. http://www.haiku-
os.org/legacy-
docs/bebook/TheInterfaceKit_Drawing.html#TheInterfaceKit_Drawing_Drawing_Modes
- specifically with respect to drawing mode B_OP_ALPHA and consequently
the appropriate parameters for SetBlendingMode()
That's not quite what I meant but it'll work. Color-keyed alpha (not sure
if that is exactly the right term) is supported for instance in SDL, where
you can set an alpha-key, and any pixels of that exact value will be
dropped when blitting, achieving a 100% transparency effect for those
pixels.
At any rate, logo.png could be edited to include an alpha-channel, or the
programmer could introduce one, or could achieve a similar effect to
color-key alpha by setting the white pixels to B_TRANSPARENT_MAGIC*.
Anyway, it can certainly be done, and shouldn't be too tricky either.
--
Ticket URL: <http://dev.haiku-os.org/ticket/7371#comment:5>
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