[cairo-bugs] [Bug 92044] New: Matrix operations offset draw on widget creation.

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Sep 18 15:56:34 PDT 2015


            Bug ID: 92044
           Summary: Matrix operations offset draw on widget creation.
           Product: cairo
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: general
          Assignee: chris at chris-wilson.co.uk
          Reporter: c_cowles at ieee.org
        QA Contact: cairo-bugs at cairographics.org

Created attachment 118353
  --> https://bugs.freedesktop.org/attachment.cgi?id=118353&action=edit
Source files illustrating cairo matrix offset bug.

When using cairo (version 1.14.3) in creating a widget, matrix use causes image
to be offset within the cairo_t.  This can be illustrated by drawing
with/without an identity matrix. (Matrix is needed for image rotation on
widget.) An example is attached. Define "USE_MATRIX" in the header file to turn
on the error. Environment used: Debian 4.8.4-1, Linux version 3.16.0-4-amd64,
gcc version 4.9.2

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