本文整理汇总了C++中QX11Info::depth方法的典型用法代码示例。如果您正苦于以下问题：C++ QX11Info::depth方法的具体用法？C++ QX11Info::depth怎么用？C++ QX11Info::depth使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QX11Info的用法示例。
在下文中一共展示了QX11Info::depth方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: xshmimg
QNativeImage::QNativeImage(int width, int height, QImage::Format format,bool /* isTextBuffer */, QWidget *widget)
: xshmimg(0), xshmpm(0)
{
if (!X11->use_mitshm) {
image = QImage(width, height, format);
// follow good coding practice and set xshminfo attributes, though values not used in this case
xshminfo.readOnly = true;
xshminfo.shmaddr = 0;
xshminfo.shmid = 0;
xshminfo.shmseg = 0;
return;
}
QX11Info info = widget->x11Info();
int dd = info.depth();
Visual *vis = (Visual*) info.visual();
xshmimg = XShmCreateImage(X11->display, vis, dd, ZPixmap, 0, &xshminfo, width, height);
if (!xshmimg) {
qWarning("QNativeImage: Unable to create shared XImage.");
return;
}
bool ok;
xshminfo.shmid = shmget(IPC_PRIVATE, xshmimg->bytes_per_line * xshmimg->height,
IPC_CREAT | 0777);
ok = xshminfo.shmid != -1;
if (ok) {
xshmimg->data = (char*)shmat(xshminfo.shmid, 0, 0);
xshminfo.shmaddr = xshmimg->data;
ok = (xshminfo.shmaddr != (char*)-1);
if (ok)
image = QImage((uchar *)xshmimg->data, width, height, systemFormat());
}
xshminfo.readOnly = false;
if (ok)
ok = XShmAttach(X11->display, &xshminfo);
if (!ok) {
qWarning() << "QNativeImage: Unable to attach to shared memory segment.";
if (xshmimg->data) {
free(xshmimg->data);
xshmimg->data = 0;
}
XDestroyImage(xshmimg);
xshmimg = 0;
if (xshminfo.shmaddr)
shmdt(xshminfo.shmaddr);
if (xshminfo.shmid != -1)
shmctl(xshminfo.shmid, IPC_RMID, 0);
return;
}
xshmpm = XShmCreatePixmap(X11->display, DefaultRootWindow(X11->display), xshmimg->data,
&xshminfo, width, height, dd);
if (!xshmpm) {
qWarning() << "QNativeImage: Unable to create shared Pixmap.";
}
}