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| author | Luboš Luňák <l.lunak@collabora.com> | 2020-04-03 22:50:12 +0200 |
|---|---|---|
| committer | Luboš Luňák <l.lunak@collabora.com> | 2020-04-07 11:53:54 +0200 |
| commit | 2fcfbd73768b69ba58607a054e7f851be2942992 (patch) | |
| tree | ee125144d0328b19994d22ed5072bb505bba7793 /vcl/opengl | |
| parent | 21719933e7632a504bf7c03e97a62b01bb938d6a (diff) | |
no gray conversion needed for VCL alpha hacks
AlphaMask doesn't need any conversion to gray, it's just enough
to make sure the alpha channel bitmap is 8bpp. And the conversion
is needed for the separate-OutputDevice-alpha hacks, where
GetBitmap() gives non-8bpp bitmap for the alpha contents, but there
all the R,G,B channels are the same, so just take red and avoid
pointless conversion.
Change-Id: Ib30fc8fa6d05067d582402ab2c0fcfb49a3742f2
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/91772
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>
Diffstat (limited to 'vcl/opengl')
| -rw-r--r-- | vcl/opengl/salbmp.cxx | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/vcl/opengl/salbmp.cxx b/vcl/opengl/salbmp.cxx index 3b500b0945dc..4c8261858023 100644 --- a/vcl/opengl/salbmp.cxx +++ b/vcl/opengl/salbmp.cxx @@ -768,4 +768,11 @@ bool OpenGLSalBitmap::ConvertToGreyscale() return true; } +// This is needed to just make the bitmap usable as an alpha channel. +// Converting to 8bit grey will do. +bool OpenGLSalBitmap::InterpretAs8Bit() +{ + return ConvertToGreyscale(); +} + /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |