https://bugs.freedesktop.org/show_bug.cgi?id=77233
Priority: medium
Bug ID: 77233
Assignee: [email protected]
Summary: DrawGradient improvements in OutputDevice
Severity: enhancement
Classification: Unclassified
OS: All
Reporter: [email protected]
Hardware: All
Status: UNCONFIRMED
Version: 4.3.0.0.alpha0+ Master
Component: graphics stack
Product: LibreOffice
DrawGradient has the following issues:
1. There are two functions, one takes a Rectangle parameter, the other a
PolyPolygon parameter. Both functions essentially do the same thing, and the
code is actually so similar that when I slightly reorganized it the only
difference is negligible.
See commit "Starting to bring DrawGradient functions into line with each other"
at
http://cgit.freedesktop.org/libreoffice/core/commit/vcl?id=954d7ad4ea7ec3746b0f0cd3f850a25e82b39c14
2. When you build a gradient, it detects if a metafile is needed. If the
polygon is actually a rectangle, we really should detect this and not bother to
encase the polygon in XGRAD_SEQ_(BEGIN|END) comment headers.
3. ClipAndDrawGradientMetafile has the option of using XOR clipping. This is
not really desirable for a number of reasons. We should probably
deprecate/remove this from the code.
4. We have gradient code in other places. Should we move this to the
OutputDevice code perhaps?
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