This provides a significant performance improvement especially for Present Windows.
Whenever a lanczos resampling is done the resulted texture is cached, till the
window is damaged or a texture of different size is required. This means that
for a taskbar thumbnail the resampling only occurs once unless the window is damaged
and for present windows it only occurs when the windows are resized and then only
after the windows have already been moved. Highlighting windows does not cause
a resampling any more.
See review request http://svn.reviewboard.kde.org/r/5708/
svn path=/trunk/KDE/kdebase/workspace/; revision=1191874
This makes it possible for the GLSL compiler to unroll it, which also
avoids the need to use relative addressing. With this change the shader
should hopefully work with the R300G driver.
The unused kernel weights are set to zero so they don't contribute
to the end result.
Thanks to Tom Stellard and Marek Olšák for their suggestions on how
to solve this problem.
CCBUG: 243191
svn path=/trunk/KDE/kdebase/workspace/; revision=1175021
It uses a new config group Blacklist in kwinrc with two subgroups for Lanczos and Blur.
The key of each entry in the group referrences the vendor either using GL_VENDOR or GL_RENDERER, e.g. "Intel" in renderer for Intel based chips.
The value of the entries is a stringlist containing exactly the renderer information. This way it is possible to blacklist several mesa driver versions which are buggy.
The blacklist is currently empty and will be filled with a kconf update script (which could also be done by distributions). So all users who experience problems and are subscribed to the bugs receiving this message, please upload your glxinfo.
An example for a blacklist:
[Blacklist][Lanczos]
NVIDIA=GeForce 9400M/PCI/SSE2
CCBUG: 243181
CCBUG: 242985
svn path=/trunk/KDE/kdebase/workspace/; revision=1146195
