On 2010-03-15 21:44-0700 David MacMahon wrote:
> I'm no expert on the PLplot devices, but my understanding is that the xcairo
> device is a cairo "widget" or "surface" drawn in a "regular" X window that
> has its own background. If that's the case, then perhaps we would need to
> create the wi
Hi, Alan,
On Mar 15, 2010, at 17:49 , Alan W. Irwin wrote:
> On 2010-03-15 15:49-0700 David MacMahon wrote:
>
>> Using a very recent ImageMagick (6.6.0), "display" gives me the
>> checkerboard background without the "-immutable" option and a
>> black background with that option when looking a
On 2010-03-15 20:38-0400 Hazen Babcock wrote:
> The problem is that we currently do not allow any choices. The cairo driver
> is explicitly starting with a non-transparent white background. It is not as
> clear to me exactly what the Qt driver is doing when it starts a new page,
> though I don'
On 2010-03-15 15:49-0700 David MacMahon wrote:
>
> On Mar 15, 2010, at 14:32 , Alan W. Irwin wrote:
>
>> Then "display -immutable test_transparent.png"
>>
>> really does show the desktop underneath the plot which indeed is a
>> really cool-looking effect.
>
> Using a very recent ImageMagick (6.6.
David MacMahon wrote:
>
>> (Without that -immutable option, display replaces a transparent
>> background
>> with a checkerboard background which apparently is something of an
>> industry
>> standard to signal you really do have a transparent background.)
>
> I agree that this *can be* a reall
On Mar 15, 2010, at 14:32 , Alan W. Irwin wrote:
> Then "display -immutable test_transparent.png"
>
> really does show the desktop underneath the plot which indeed is a
> really cool-looking effect.
Using a very recent ImageMagick (6.6.0), "display" gives me the
checkerboard background without
On 2010-03-14 11:32-0700 Alan W. Irwin wrote:
> On 2010-03-14 10:50-0500 Hezekiah M. Carty wrote:
>> Revision 10866 should fix this. If the background color has an alpha
>> value < 1.0 then a white surface is drawn before the transparent
>> background color. This produces good looking results fo
