[bug #45122] [base][patch] Pattern phase support

[Josh Freeman]

URL:
  <http://savannah.gnu.org/bugs/?45122>

                 Summary: [base][patch] Pattern phase support
                 Project: GNUstep
            Submitted by: tedge
            Submitted on: Sun 17 May 2015 09:41:52 PM GMT
                Category: Backend
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

  Setup: VirtualBox 4.3 + Ubuntu 14.04 guest, Clang, current SVN trunk

  Patch adds support for the NSGraphicsContext's patternPhase offset when
drawing a pattern. (Patterns are currently always drawn with zero offset,
regardless of the draw context's patternPhase value).

  Pattern phase is useful for scrolling or animating a pattern-filled area, as
well as for tiling a pattern that's pinned to a nonzero origin.

  Patch also corrects a minor issue with getting the pattern size: The size
message is sent to a safer target object - the received parameter,
pattern_image - instead of the instance member, pattern. (Seems like they're
always the same object, but it's safer not to assume this).

  Test program is also attached.



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File Attachments:


-------------------------------------------------------
Date: Sun 17 May 2015 09:41:52 PM GMT  Name: TestPatternPhase.m  Size: 2kB  
By: tedge

<http://savannah.gnu.org/bugs/download.php?file_id=34039>
-------------------------------------------------------
Date: Sun 17 May 2015 09:41:52 PM GMT  Name: back_PatternPhase.patch  Size:
2kB   By: tedge

<http://savannah.gnu.org/bugs/download.php?file_id=34038>

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