[vwnc] How to copy a Cairo PNG image to the clipboard
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[vwnc] How to copy a Cairo PNG image to the clipboard
 
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Hi,
There must be a very simple wy to copy a Cairo
image to the clipboard to be able to paste it into other
applications.
Has anyone n idea how to do to this ?
Regards,
@+Maarten,
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You can send #toClipboard to a Pixmap so if you can convert a
Cairo image to a Pixmap then that should work. This is an example that's shown in the #toClipboard method: Image fromUser asRetainedMedium toClipboard From: [hidden email]
[mailto:[hidden email]] On Behalf Of Maarten MOSTERT Hi, There
must be a very simple wy to copy a Cairo image to the clipboard to be able to
paste it into other applications. Has
anyone n idea how to do to this ? Regards, @+Maarten, _______________________________________________ vwnc mailing list [hidden email] http://lists.cs.uiuc.edu/mailman/listinfo/vwnc |
Re: [vwnc] How to copy a Cairo PNG image to the clipboard
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On Jan 4, 2010, at 1:08 AM, Mark Plas wrote: > You can send #toClipboard to a Pixmap so if you can convert a Cairo > image to a Pixmap then that should work. > > This is an example that's shown in the #toClipboard method: > > Image fromUser asRetainedMedium toClipboard > > > > From: [hidden email] [mailto:[hidden email]] On > Behalf Of Maarten MOSTERT > Sent: zaterdag 2 januari 2010 10:14 > To: VWNC > Subject: [vwnc] How to copy a Cairo PNG image to the clipboard > > Hi, > > There must be a very simple wy to copy a Cairo image to the > clipboard to be able to paste it into other applications. > > Has anyone n idea how to do to this ? Primitive 776 is implemented for Windows, not for X11, and not for OSX. It was implemented for old Mac OS, but that's not supported anymore. IOW, if all you want is Windows, the above should work fine. -- Travis Griggs Objologist 10 2 letter words: "If it is to be, it is up to me" _______________________________________________ vwnc mailing list [hidden email] http://lists.cs.uiuc.edu/mailman/listinfo/vwnc |
Re: [vwnc] How to copy a Cairo PNG image to the clipboard
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Oké If I write the Cairo Image to a png file I can read it with Imagereader
and push it to the Clipboard. This is not the most elegant way but really cool ..... @+Maarten, ----- Original Message ----- From: "Travis Griggs" <[hidden email]> To: "VWNC List" <[hidden email]> Sent: Monday, January 04, 2010 4:43 PM Subject: Re: [vwnc] How to copy a Cairo PNG image to the clipboard > > > On Jan 4, 2010, at 1:08 AM, Mark Plas wrote: > >> You can send #toClipboard to a Pixmap so if you can convert a Cairo >> image to a Pixmap then that should work. >> >> This is an example that's shown in the #toClipboard method: >> >> Image fromUser asRetainedMedium toClipboard >> >> >> >> From: [hidden email] [mailto:[hidden email]] On >> Behalf Of Maarten MOSTERT >> Sent: zaterdag 2 januari 2010 10:14 >> To: VWNC >> Subject: [vwnc] How to copy a Cairo PNG image to the clipboard >> >> Hi, >> >> There must be a very simple wy to copy a Cairo image to the >> clipboard to be able to paste it into other applications. >> >> Has anyone n idea how to do to this ? > > Primitive 776 is implemented for Windows, not for X11, and not for > OSX. It was implemented for old Mac OS, but that's not supported > anymore. IOW, if all you want is Windows, the above should work fine. > > -- > Travis Griggs > Objologist > 10 2 letter words: "If it is to be, it is up to me" > > > _______________________________________________ > vwnc mailing list > [hidden email] > http://lists.cs.uiuc.edu/mailman/listinfo/vwnc > > _______________________________________________ vwnc mailing list [hidden email] http://lists.cs.uiuc.edu/mailman/listinfo/vwnc |
Re: [vwnc] How to copy a Cairo PNG image to the clipboard
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In reply to this post by Maarten Mostert-2
Can't you just display the
Cairo image on a Pixmap? Something like this:
myNewPixmap := Pixmap extent:
aCairoPngImage extent.
aCairoPngImage displayOn: myNewPixmap
graphicsContext.
myNewPixmap toClipboard
If that doesn't work, and you
decide to go the PNG route, you may be able to write and read the PNG stream in
memory, rather than using a file: that's what we did when interfacing with GDI+
(although then we were going the other way to you):
winImageFrom: image
"WinGDIPlusInterface and PNGWriter are both in the public store" | ws | ws := (ByteArray new: image bitsInstVar size // 4) writeStream. Refactory.PNG.PNGImageWriter writeImage: image on: ws. ^Graphics.WinGDIPlus.GDIPlusBitmap fromBytes: ws contents Steve From: [hidden email] on behalf of Maarten MOSTERT Sent: Tue 05/01/2010 06:38 To: VWNC List Subject: Re: [vwnc] How to copy a Cairo PNG image to the clipboard Oké If I write the Cairo Image to a png file I can read it with
Imagereader _______________________________________________ vwnc mailing list [hidden email] http://lists.cs.uiuc.edu/mailman/listinfo/vwnc |
Re: [vwnc] How to copy a Cairo PNG image to the clipboard
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Hi Steve,
Well both your tips seem worked:
With a normal Cairo's Image Surface:
myNewPixmap := Pixmap extent: aCairoImage
extent.
aCairoImage displayOn: myNewPixmap
graphicsContext.
myNewPixmap toClipboard
and through the GDI ° interface:
ws := ByteArray new writeStream.
aCairoImage writeToPngStream: ws.
(Graphics.WinGDIPlus.GDIPlusBitmap fromBytes: ws contents)
asRetainedMedium toClipboard.
If I poke around the Cairo documentation I still have the
impression that the Win32 Surface is capable of directly supplying the Dip Win32
Bitmap Windows seems to expect.
It would be cool if Cairo could do this job
directly on all platforms. Obviouly if cincom could file an AR to fix OSX and
Linux that would excellent. This really is basic functionality everyone is using
all the time.
Regards,
@+Maarten,
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