bugGNUstep - Bugs: bug #25216, Cairo backend does not work on...


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bug #25216: Cairo backend does not work on Windows

Submitted by:  Adam Fedor <fedor>
Submitted on:  Wed 31 Dec 2008 04:16:25 AM UTC  
Category:  Backend Severity:  3 - Normal
Item Group:  Bug Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open

Wed 01 Apr 2009 08:02:23 AM UTC, comment #1:

I am not familiar with cairo on Windows, but on the cairo mailing list there recently was a posting that claims that cairo wont support an alpha chanel on Windows directly. You will have to use cairo_win32_surface_create_with_dib() to get full alpha support for your surface.
This could well explain the second issue you are facing.

Fred Kiefer <FredKiefer>
Project Member
Wed 31 Dec 2008 04:16:25 AM UTC, original submission:

The are a number of issues:

1. backend does not default to a known font if the "default" font (Helvetica) is not found (easy workaround is to set the default font to a known font).

2. Images are not displayed.

3. After a window redraw or two, the window turns black and you get the error message "Cairo status 'out of memory' in copy'"

See screenshots for more info.

Adam Fedor <fedor>
Project Administrator


Attached Files
file #17178:  Picture 3.png added by fedor (172KiB - image/png)
file #17179:  Picture 4.png added by fedor (230KiB - image/png)


Depends on the following items: None found

Items that depend on this one: None found


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  • -email is unavailable- added by FredKiefer (Posted a comment)
  • -email is unavailable- added by fedor (Submitted the item)

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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2008-12-31 fedor Attached File- => Added Picture 3.png, #17178
        Attached File- => Added Picture 4.png, #17179

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