BUG: Driver vs. GDI-Simulated Styled Lines Don't Match (111863)
The information in this article applies to:
- Microsoft Windows Software Development Kit (SDK) 3.1
This article was previously published under Q111863 SYMPTOMS
Lines drawn using the same styled pen may appear slightly different. For
example, when drawing styled lines with the R2_XORPEN raster operation to
draw and remove lines quickly, some pixels may be left behind.
CAUSE
GDI's styled line simulation does not match pixel-for-pixel the display
driver's styled line drawing. Styled lines are drawn either by GDI or by
the display driver depending on the driver's line and clipping
capabilities. Even if a driver supports styled lines, it may not handle
styled lines when clipping is involved. In the situations not handled by
the driver, GDI will simulate the styled line, thus exhibiting differences
in pixels.
STATUS
Microsoft has confirmed this to be a bug in Microsoft Windows version
3.1. We are researching this problem and will post new information here in
the Microsoft Knowledge Base as it becomes available.
| Modification Type: | Major | Last Reviewed: | 11/12/1999 |
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| Keywords: | KB111863 |
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