[cairo-bugs] [Bug 32068] New: Create Image fallback for A8 format due to missing Qt support

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=32068

           Summary: Create Image fallback for A8 format due to missing Qt
                    support
           Product: cairo
           Version: 1.9.13
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: qt backend
        AssignedTo: cairo-bugs at cairographics.org
        ReportedBy: romaxa at gmail.com


Created an attachment (id=40757)
 View: https://bugs.freedesktop.org/attachment.cgi?id=40757
 Review: https://bugs.freedesktop.org/review?bug=32068&attachment=40757

Create cairo image surface in case of a8 

Qt does not support rendering into A8 format, so cairo-qt in that case just
fail
.............
QPainter::begin: Cannot paint on an image with the QImage::Format_Indexed8
format
Segmentation fault
QImage does not support painting on A8 surface, and not possible create
qpainter.
.............

https://bugzilla.mozilla.org/show_bug.cgi?id=602171


http://doc.qt.nokia.com/4.7/qimage.html#Format-enum
Note: Drawing into a QImage with QImage::Format_Indexed8 is not supported.

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