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kwin: Align decoration texture sizes to 128 pixels

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This reduces the number of texture reallocations while
resizing windows.
This commit is contained in:
Fredrik Höglund 2013-03-17 00:53:11 +01:00
parent ac5f1317e9
commit d0703292fc
1 changed files with 9 additions and 4 deletions
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13
paintredirector.cpp
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@ -72,6 +72,11 @@ void PaintRedirector::reparent(Deleted *d)
m_client = NULL;
}
static int align(int value, int align)
{
return (value + align - 1) & ~(align - 1);
}
void PaintRedirector::performPendingPaint()
{
if (!widget) {
@ -81,8 +86,8 @@ void PaintRedirector::performPendingPaint()
const QSize size = pending.boundingRect().size();
QPaintDevice *scratch = this->scratch();
if (scratch->width() < size.width() || scratch->height() < size.height()) {
int w = (size.width() + 128) & ~128;
int h = (size.height() + 128) & ~128;
int w = align(size.width(), 128);
int h = align(size.height(), 128);
scratch = recreateScratch(QSize(qMax(scratch->width(), w), qMax(scratch->height(), h)));
}
fillScratch(Qt::transparent);
@ -325,8 +330,8 @@ void OpenGLPaintRedirector::resizePixmaps(const QRect *rects)
{
QSize size[2];
size[LeftRight] = QSize(rects[LeftPixmap].width() + rects[RightPixmap].width(),
qMax(rects[LeftPixmap].height(), rects[RightPixmap].height()));
size[TopBottom] = QSize(qMax(rects[TopPixmap].width(), rects[BottomPixmap].width()),
align(qMax(rects[LeftPixmap].height(), rects[RightPixmap].height()), 128));
size[TopBottom] = QSize(align(qMax(rects[TopPixmap].width(), rects[BottomPixmap].width()), 128),
rects[TopPixmap].height() + rects[BottomPixmap].height());
for (int i = 0; i < 2; i++) {