Bug 13612

Summary:	Size 0 fonts result in error
Product:	cairo	Reporter:	Behdad Esfahbod <freedesktop>
Component:	general	Assignee:	Carl Worth <cworth>
Status:	RESOLVED FIXED	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	normal
Priority:	medium	CC:	lool
Version:	1.2.0
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Behdad Esfahbod 2007-12-11 21:56:53 UTC

Because the font matrix can't be inverted.  Pango report:

  http://bugzilla.gnome.org/show_bug.cgi?id=431990

I wrote about it before here:

  http://lists.freedesktop.org/archives/cairo/2007-June/010737.html

Comment 1 Behdad Esfahbod 2008-01-27 14:53:27 UTC

Fixed now:

commit 5dfe47a3f14ee8597395dc53ff57fd429e9804cd
Author: Behdad Esfahbod <behdad@behdad.org>
Date:   Fri Jan 25 00:35:11 2008 -0500

    [cairo-scaled-font] Unbreak it after my recent commit
    
    Sigh.

commit efd3a965244305a069ec231b7ec28cff8d6c67c8
Author: Behdad Esfahbod <behdad@behdad.org>
Date:   Thu Jan 24 23:35:06 2008 -0500

    [cairo-scaled-font] Don't err on font size 0, really
    
    First, seems like we were rejecting degenerate font matrix right away
    at the constructor.  Don't do that.
    
    Next, PS/PDF were inverting the font scale matrix, assuming that it's
    invertible.  We now keep the inverse too, so they can use it.  For the
    case of a size 0 font, both the scale matrix and its invert are set to
    0,0,0,0.  That's safe, even if slightly inconsistent.

commit 45f269e33020d8d7cf247926712b9c64c1fb8959
Author: Behdad Esfahbod <behdad@behdad.org>
Date:   Thu Jan 24 22:39:28 2008 -0500

    [cairo-scaled-font] Oops, return err if not handling it

commit 6d0dc3e0760e6bc6b0eceab48674410b4e865287
Author: Behdad Esfahbod <behdad@behdad.org>
Date:   Thu Jan 24 22:24:23 2008 -0500

    [cairo-scaled-font] Don't err on font size 0

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