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Big ole speed improvement :)

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First off, Rikkus was right about double buffering. I really didn't think this
was needed and tried everything to get rid of the flicker but it didn't happen
until I double buffered the title. I was able to optimize this quite a bit
(only recalc on resize, only buffer the active title/color scheme, etc...).

In the meantime, I got rid of a lot of non-optimal painting and now use
NoBackground for the widget. The latter was a obvious move as it avoids a whole
clearing of the widget :P This resulted in a big speed improvement, which helps
offset the time taken in buffering ;-)

svn path=/trunk/kdebase/kwin/; revision=45264
This commit is contained in:
Daniel M. Duley 2000-04-01 01:18:12 +00:00
parent 8e6fb39db3
commit 7ba2cf2d87
2 changed files with 74 additions and 76 deletions
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140
clients/system/systemclient.cpp
View file

@ -43,7 +43,6 @@ static unsigned char sticky_bits[] = {
static unsigned char question_bits[] = {
0x3c, 0x66, 0x60, 0x30, 0x18, 0x00, 0x18, 0x18};
static QPixmap *titlePix=0;
static KPixmap *aUpperGradient=0;
static KPixmap *iUpperGradient=0;
static bool pixmaps_created = false;
@ -54,29 +53,7 @@ static void create_pixmaps()
return;
pixmaps_created = true;
// titlebar
QPainter p;
QPainter maskPainter;
int i, y;
titlePix = new QPixmap(32, 14);
QBitmap mask(32, 14);
mask.fill(Qt::color0);
p.begin(titlePix);
maskPainter.begin(&mask);
maskPainter.setPen(Qt::color1);
for(i=0, y=2; i < 4; ++i, y+=3){
p.setPen(options->color(Options::Groove, true).light(150));
p.drawLine(0, y, 31, y);
maskPainter.drawLine(0, y, 31, y);
p.setPen(options->color(Options::Groove, true).dark(120));
p.drawLine(0, y+1, 31, y+1);
maskPainter.drawLine(0, y+1, 31, y+1);
}
p.end();
maskPainter.end();
titlePix->setMask(mask);
if(QPixmap::defaultDepth() > 8 &&
kapp->palette().normal().brush(QColorGroup::Background).pixmap()==NULL){
aUpperGradient = new KPixmap;
@ -92,6 +69,7 @@ static void create_pixmaps()
options->color(Options::Frame, false).light(130),
bgColor,
KPixmapEffect::VerticalGradient);
}
}
@ -180,13 +158,14 @@ void SystemButton::drawButton(QPainter *p)
void SystemClient::slotReset()
{
delete titlePix;
if(aUpperGradient){
delete aUpperGradient;
delete iUpperGradient;
}
pixmaps_created = false;
create_pixmaps();
titleBuffer.resize(0, 0);
recalcTitleBuffer();
button[0]->reset();
button[1]->reset();
button[2]->reset();
@ -253,13 +232,17 @@ SystemClient::SystemClient( Workspace *ws, WId w, QWidget *parent,
hb->addWidget( button[3]);
hb->addSpacing(3);
setBackgroundMode(NoBackground);
recalcTitleBuffer();
}
void SystemClient::resizeEvent( QResizeEvent* e)
void SystemClient::resizeEvent( QResizeEvent* )
{
Client::resizeEvent( e );
//Client::resizeEvent( e );
recalcTitleBuffer();
doShape();
/*
if ( isVisibleToTLW() && !testWFlags( WNorthWestGravity )) {
QPainter p( this );
QRect t = titlebar->geometry();
@ -268,11 +251,54 @@ void SystemClient::resizeEvent( QResizeEvent* e)
r = r.subtract( t );
p.setClipRegion( r );
p.eraseRect( rect() );
}
}*/
}
void SystemClient::captionChange( const QString& )
void SystemClient::recalcTitleBuffer()
{
if(oldTitle == caption() && width() == titleBuffer.width())
return;
QFontMetrics fm(options->font(true));
titleBuffer.resize(width(), 18);
QPainter p;
p.begin(&titleBuffer);
if(aUpperGradient)
p.drawTiledPixmap(0, 0, width(), 18, *aUpperGradient);
else
p.fillRect(0, 0, width(), 18,
options->colorGroup(Options::Frame, true).
brush(QColorGroup::Button));
QRect t = titlebar->geometry();
t.setTop( 2 );
t.setLeft( t.left() + 4 );
t.setRight( t.right() - 2 );
QRegion r(t.x(), 0, t.width(), 18);
r -= QRect(t.x()+((t.width()-fm.width(caption()))/2)-4,
0, fm.width(caption())+8, 18);
p.setClipRegion(r);
int i, ly;
for(i=0, ly=4; i < 4; ++i, ly+=3){
p.setPen(options->color(Options::Groove, true).light(150));
p.drawLine(0, ly, width()-1, ly);
p.setPen(options->color(Options::Groove, true).dark(120));
p.drawLine(0, ly+1, width()-1, ly+1);
}
p.setClipRect(t);
p.setPen(options->color(Options::GrooveText, true));
p.setFont(options->font(true));
p.drawText(t.x()+((t.width()-fm.width(caption()))/2)-4,
0, fm.width(caption())+8, 18, AlignCenter, caption());
p.setClipping(false);
p.end();
oldTitle = caption();
}
void SystemClient::captionChange( const QString &)
{
recalcTitleBuffer();
repaint( titlebar->geometry(), false );
}
@ -287,50 +313,33 @@ void SystemClient::paintEvent( QPaintEvent* )
{
QPainter p( this );
QRect t = titlebar->geometry();
t.setTop( 1 );
QBrush fillBrush(colorGroup().brush(QColorGroup::Background).pixmap() ?
colorGroup().brush(QColorGroup::Background) :
options->colorGroup(Options::Frame, isActive()).
brush(QColorGroup::Button));
p.fillRect(rect(), fillBrush);
if(aUpperGradient){
if(isActive()){
p.drawTiledPixmap(0, 0, width(), 18, *aUpperGradient);
}
else{
p.drawTiledPixmap(0, 0, width(), 18, *iUpperGradient);
}
}
t.setTop( 1 );
if(isActive())
p.drawTiledPixmap(t, *titlePix);
QRegion r = rect();
r = r.subtract( t );
p.setClipRegion( r );
p.setClipping( FALSE );
p.fillRect(1, 18, width()-2, height()-19, fillBrush);
t.setTop( 2 );
t.setLeft( t.left() + 4 );
t.setRight( t.right() - 2 );
if(isActive())
p.drawPixmap(0, 0, titleBuffer);
else{
if(iUpperGradient)
p.drawTiledPixmap(0, 0, width(), 18, *iUpperGradient);
else
p.fillRect(0, 0, width(), 18,
options->colorGroup(Options::Frame, false).
brush(QColorGroup::Button));
p.setPen(options->color(Options::GrooveText, isActive()));
p.setFont(options->font(isActive()));
if(isActive()){
QFontMetrics fm(options->font(true));
if(aUpperGradient)
p.drawTiledPixmap(t.x()+((t.width()-fm.width(caption()))/2)-4,
0, fm.width(caption())+8, 18,
isActive() ? *aUpperGradient :
*iUpperGradient);
else
p.fillRect(t.x()+((t.width()-fm.width(caption()))/2)-4, t.y(),
fm.width(caption())+8, t.height(), fillBrush);
p.drawText(t, AlignCenter, caption() );
}
p.drawText( t, AlignCenter, caption() );
p.setPen(options->colorGroup(Options::Frame, isActive()).light());
p.drawLine(width()-20, height()-7, width()-10, height()-7);
@ -351,21 +360,6 @@ void SystemClient::doShape()
QRegion mask;
kRoundMaskRegion(mask, 0, 0, width(), height());
/*
(QRect(6, 0, width()-12, height()));
mask += QRegion(QRect(5, 1, 1, height()-2)); // left
mask += QRegion(QRect(4, 1, 1, height()-2));
mask += QRegion(QRect(3, 2, 1, height()-4));
mask += QRegion(QRect(2, 3, 1, height()-6));
mask += QRegion(QRect(1, 4, 1, height()-8));
mask += QRegion(QRect(0, 6, 1, height()-12));
int x2 = width()-1;
mask += QRegion(QRect(x2-5, 1, 1, height()-2)); // right
mask += QRegion(QRect(x2-4, 1, 1, height()-2));
mask += QRegion(QRect(x2-3, 2, 1, height()-4));
mask += QRegion(QRect(x2-2, 3, 1, height()-6));
mask += QRegion(QRect(x2-1, 4, 1, height()-8));
mask += QRegion(QRect(x2, 6, 1, height()-12)); */
setMask(mask);
}

4
clients/system/systemclient.h
View file

@ -43,14 +43,18 @@ protected:
void stickyChange(bool on);
void maximizeChange(bool m);
void doShape();
void recalcTitleBuffer();
protected slots:
void slotReset();
private:
SystemButton* button[5];
QSpacerItem* titlebar;
QPixmap titleBuffer;
QString oldTitle;
};
#endif