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Optimize logout vignetting and increase its resolution.

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svn path=/trunk/KDE/kdebase/workspace/; revision=1051774
This commit is contained in:
Lucas Murray 2009-11-20 06:09:15 +00:00
parent d5d0e8762a
commit 1b80aec136
1 changed files with 12 additions and 25 deletions
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37
effects/logout/logout.cpp
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@ -236,35 +236,22 @@ void LogoutEffect::paintScreen( int mask, QRegion region, ScreenPaintData& data
// Vignetting (Radial gradient with transparent middle and black edges)
for( int screen = 0; screen < effects->numScreens(); screen++ )
{ // TODO: Cache
{
QRect screenGeom = effects->clientArea( ScreenArea, screen, 0 );
glScissor( screenGeom.x(), displayHeight() - screenGeom.y() - screenGeom.height(),
screenGeom.width(), screenGeom.height() ); // GL coords are flipped
glEnable( GL_SCISSOR_TEST ); // Geom must be set before enable
float ro = float(( screenGeom.width() > screenGeom.height() )
? screenGeom.width() : screenGeom.height() ) * 0.8f; // Outer radius
glBegin( GL_TRIANGLES );
const float a = M_PI / 8.0f; // Angle of increment
for( float i = 0.0f; i < M_PI * 1.99f; i += a )
{
float x, y;
glColor4f( 0.0f, 0.0f, 0.0f, 0.0f );
x = screenGeom.x() + screenGeom.width() / 2;
y = screenGeom.y() + screenGeom.height() / 2;
glVertex3f( x, y, 0 );
glColor4f( 0.0f, 0.0f, 0.0f, progress * 0.9f );
x = ro * cos( i ) + screenGeom.x() + screenGeom.width() / 2;
y = ro * sin( i ) + screenGeom.y() + screenGeom.height() / 2;
glVertex3f( x, y, 0 );
x = ro * cos( i + a ) + screenGeom.x() + screenGeom.width() / 2;
y = ro * sin( i + a ) + screenGeom.y() + screenGeom.height() / 2;
glVertex3f( x, y, 0 );
}
const float cenX = screenGeom.x() + screenGeom.width() / 2;
const float cenY = screenGeom.y() + screenGeom.height() / 2;
const float a = M_PI / 16.0f; // Angle of increment
const float r = float(( screenGeom.width() > screenGeom.height() )
? screenGeom.width() : screenGeom.height() ) * 0.8f; // Radius
glBegin( GL_TRIANGLE_FAN );
glColor4f( 0.0f, 0.0f, 0.0f, 0.0f );
glVertex3f( cenX, cenY, 0.0f );
glColor4f( 0.0f, 0.0f, 0.0f, progress * 0.9f );
for( float i = 0.0f; i <= M_PI * 2.01f; i += a )
glVertex3f( cenX + r * cos( i ), cenY + r * sin( i ), 0.0f );
glEnd();
glDisable( GL_SCISSOR_TEST );
}