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Use PaintClipper to restrict reflections to the current screen. By that we can make the reflection plane so huge that it will definatelly be on the screen.

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svn path=/trunk/KDE/kdebase/workspace/; revision=892204
This commit is contained in:
Martin Gräßlin 2008-12-03 19:48:06 +00:00
parent 3150cb2631
commit 77381aadb3
1 changed files with 8 additions and 19 deletions
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27
effects/coverswitch.cpp
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@ -224,6 +224,8 @@ void CoverSwitchEffect::paintScreen( int mask, QRegion region, ScreenPaintData&
if( reflection )
{
// restrict painting the reflections to the current screen
PaintClipper::push( QRegion( area ));
// no reflections during start and stop animation
if( !start && !stop )
paintScene( frontWindow, &leftWindows, &rightWindows, true );
@ -232,17 +234,14 @@ void CoverSwitchEffect::paintScreen( int mask, QRegion region, ScreenPaintData&
glPolygonMode( GL_FRONT, GL_FILL );
glPushMatrix();
QRect fullRect = effects->clientArea( FullArea, activeScreen, effects->currentDesktop() );
float reflectionScaleFactor = 6150 * tan( 60.0 * M_PI / 360.0f )/area.width();
// we can use a huge scale factor (needed to calculate the rearground vertices)
// as we restrict with a PaintClipper painting on the current screen
float reflectionScaleFactor = 100000 * tan( 60.0 * M_PI / 360.0f )/area.width();
if( effects->numScreens() > 1 && area.x() != fullRect.x() )
{
// have to change the reflection area in horizontal layout and right screen
glTranslatef( -area.x(), 0.0, 0.0 );
}
if( displayWidth()-area.width() != 0 )
{
if( area.width() < displayWidth() * 0.5f )
reflectionScaleFactor *= (float)area.width()/(float)(displayWidth()-area.width());
}
glTranslatef( area.x() + area.width()*0.5f, 0.0, 0.0 );
float vertices[] = {
-area.width()*0.5f, area.height(), 0.0,
@ -257,29 +256,19 @@ void CoverSwitchEffect::paintScreen( int mask, QRegion region, ScreenPaintData&
alpha = 1.0 - timeLine.value();
glColor4f( 0.0, 0.0, 0.0, alpha );
// HACK: Use a scissor to only display the reflection area on the correct screen.
// All the above code should be converted to use a scissor from the beginning or
// get the correct coords and use those instead.
QRect screenRect = effects->clientArea( ScreenArea, activeScreen, effects->currentDesktop() );
glScissor( screenRect.x(), screenRect.y(), screenRect.width(), screenRect.height() );
glEnable( GL_SCISSOR_TEST );
glBegin( GL_POLYGON );
glVertex3f( vertices[0], vertices[1], vertices[2] );
glVertex3f( vertices[3], vertices[4], vertices[5] );
// rearground
alpha = -1.0;
glColor4f( 0.0, 0.0, 0.0, alpha );
//glVertex3f( vertices[6], vertices[7], vertices[8] );
//glVertex3f( vertices[9], vertices[10], vertices[11] );
glVertex3f( vertices[6]*2, vertices[7], vertices[8] ); // } Scissor HACK
glVertex3f( vertices[9]*2, vertices[10], vertices[11] ); //
glVertex3f( vertices[6], vertices[7], vertices[8] );
glVertex3f( vertices[9], vertices[10], vertices[11] );
glEnd();
glDisable( GL_SCISSOR_TEST ); // Scissor HACK
glPopMatrix();
glDisable( GL_BLEND );
PaintClipper::pop( QRegion( area ));
}
paintScene( frontWindow, &leftWindows, &rightWindows );