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Fix a performance problem with the radeon driver and effects that use

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tranformations when in Xrender mode.

svn path=/trunk/KDE/kdebase/workspace/; revision=1063025
This commit is contained in:
Fredrik Höglund 2009-12-16 18:51:36 +00:00
parent 042af295ee
commit 85d965a78e
1 changed files with 23 additions and 0 deletions
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23
scene_xrender.cpp
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@ -684,6 +684,8 @@ void SceneXrender::Window::performPaint( int mask, QRegion region, WindowPaintDa
{ XDoubleToFixed( 0 ), XDoubleToFixed( 0 ), XDoubleToFixed( 1 ) }
}};
XRenderPictureAttributes attr;
if( mask & PAINT_WINDOW_TRANSFORMED )
{
xscale = data.xScale;
@ -704,6 +706,22 @@ void SceneXrender::Window::performPaint( int mask, QRegion region, WindowPaintDa
if( filter == ImageFilterGood )
XRenderSetPictureFilter( display(), pic, const_cast< char* >( "good" ), NULL, 0 );
// This is needed to avoid hitting a fallback in the radeon driver.
// The Render specification states that sampling pixels outside the
// source picture results in alpha=0 pixels. This can be achieved by
// setting the border color to transparent black, but since the border
// color has the same format as the texture, it only works when the
// texture has an alpha channel. So the driver falls back to software
// when the repeat mode is RepeatNone, the picture has a non-identity
// transformation matrix, and doesn't have an alpha channel.
// Since we only scale the picture, we can work around this by setting
// the repeat mode to RepeatPad.
if (!window()->hasAlpha())
{
attr.repeat = RepeatPad;
XRenderChangePicture( display(), pic, CPRepeat, &attr );
}
// transform the shape for clipping in paintTransformedScreen()
QVector< QRect > rects = transformed_shape.rects();
for( int i = 0;
@ -817,6 +835,11 @@ void SceneXrender::Window::performPaint( int mask, QRegion region, WindowPaintDa
XRenderSetPictureTransform( display(), pic, &identity );
if( filter == ImageFilterGood )
XRenderSetPictureFilter( display(), pic, const_cast< char* >( "fast" ), NULL, 0 );
if (!window()->hasAlpha())
{
attr.repeat = RepeatNone;
XRenderChangePicture( display(), pic, CPRepeat, &attr );
}
}
}