void QWSSharedMemSurface::setGeometry(const QRect &rect)
{
const QSize size = rect.size();
if (img.size() != size) {
if (size.isEmpty()) {
mem.detach();
img = QImage();
} else {
mem.detach();
QWidget *win = window();
const QImage::Format format = preferredImageFormat(win);
const int bpl = nextMulOf4(bytesPerPixel(format) * size.width());
#ifdef QT_QWS_CLIENTBLIT
const int imagesize = bpl * size.height() + sizeof(uint);
#else
const int imagesize = bpl * size.height();
#endif
if (!mem.create(imagesize)) {
perror("QWSSharedMemSurface::setGeometry allocating shared memory");
qFatal("Error creating shared memory of size %d", imagesize);
}
#ifdef QT_QWS_CLIENTBLIT
*((uint *)mem.address()) = 0;
uchar *base = static_cast<uchar*>(mem.address()) + sizeof(uint);
#else
uchar *base = static_cast<uchar*>(mem.address());
#endif
img = QImage(base, size.width(), size.height(), bpl, format);
setImageMetrics(img, win);
}
}
QWSWindowSurface::setGeometry(rect);
}
bool QWSMemorySurface::isValid() const
{
if (img.isNull())
return true;
const QWidget *win = window();
if (preferredImageFormat(win) != img.format())
return false;
if (isOpaque() != isWidgetOpaque(win)) // XXX: use QWidgetPrivate::isOpaque()
return false;
return true;
}
void QWSLocalMemSurface::setGeometry(const QRect &rect)
{
QSize size = rect.size();
QWidget *win = window();
if (win && !win->mask().isEmpty()) {
const QRegion region = win->mask()
& rect.translated(-win->geometry().topLeft());
size = region.boundingRect().size();
}
uchar *deleteLater = 0;
if (img.size() != size) {
if (size.isEmpty()) {
if (memsize) {
// In case of a Hide event we need to delete the memory after sending the
// event to the server in order to let the server animate the event.
deleteLater = mem;
memsize = 0;
}
mem = 0;
img = QImage();
} else {
const QImage::Format format = preferredImageFormat(win);
const int bpl = nextMulOf4(bytesPerPixel(format) * size.width());
const int imagesize = bpl * size.height();
if (memsize < imagesize) {
delete[] mem;
memsize = imagesize;
mem = new uchar[memsize];
}
img = QImage(mem, size.width(), size.height(), bpl, format);
setImageMetrics(img, win);
}
}
QWSWindowSurface::setGeometry(rect);
delete[] deleteLater;
}
