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Only use lanczos if the window size does not exceed the FBO size.

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svn path=/trunk/KDE/kdebase/workspace/; revision=1169481
This commit is contained in:
Martin Gräßlin 2010-08-29 11:27:57 +00:00
parent 75456580e5
commit a16f7f0672
1 changed files with 12 additions and 1 deletions
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13
lanczosfilter.cpp
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@ -182,7 +182,9 @@ void LanczosFilter::performPaint( EffectWindowImpl* w, int mask, QRegion region,
{ {
if (!m_inited) if (!m_inited)
init(); init();
if ( m_shader ) const QRect screenRect = Workspace::self()->clientArea( ScreenArea, w->screen(), w->desktop() );
// window geometry may not be bigger than screen geometry to fit into the FBO
if ( m_shader && w->width() <= screenRect.width() && w->height() <= screenRect.height() )
{ {
double left = 0; double left = 0;
double top = 0; double top = 0;
@ -198,6 +200,15 @@ void LanczosFilter::performPaint( EffectWindowImpl* w, int mask, QRegion region,
} }
double width = right - left; double width = right - left;
double height = bottom - top; double height = bottom - top;
if( width > screenRect.width() || height > screenRect.height() )
{
// window with padding does not fit into the framebuffer
// so cut of the shadow
left = 0;
top = 0;
width = w->width();
height = w->height();
}
int tx = data.xTranslate + w->x() + left*data.xScale; int tx = data.xTranslate + w->x() + left*data.xScale;
int ty = data.yTranslate + w->y() + top*data.yScale; int ty = data.yTranslate + w->y() + top*data.yScale;
int tw = width*data.xScale; int tw = width*data.xScale;