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Do not choke on zero-sized windows.

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Configure requests with zero width or height will always
fail with BadValue and have to be avoided. Same goes for
shm segments of size 0.
This commit is contained in:
Laszlo Agocs 2011-06-01 10:37:30 +02:00
parent 38745b341c
commit 646fcc1bd3
2 changed files with 18 additions and 5 deletions
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5
src/plugins/platforms/xcb/qxcbwindow.cpp
View File

@ -285,7 +285,10 @@ void QXcbWindow::setGeometry(const QRect &rect)
QPlatformWindow::setGeometry(rect);
const quint32 mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
const quint32 values[] = { rect.x(), rect.y(), rect.width(), rect.height() };
const quint32 values[] = { rect.x(),
rect.y(),
qBound(1, rect.width(), XCOORD_MAX),
qBound(1, rect.height(), XCOORD_MAX) };
Q_XCB_CALL(xcb_configure_window(xcb_connection(), m_window, mask, values));
}

12
src/plugins/platforms/xcb/qxcbwindowsurface.cpp
View File

@ -98,7 +98,10 @@ QXcbShmImage::QXcbShmImage(QXcbScreen *screen, const QSize &size, uint depth, QI
~0,
0);
int segmentSize = m_xcb_image->stride * m_xcb_image->height;
const int segmentSize = m_xcb_image->stride * m_xcb_image->height;
if (!segmentSize)
return;
int id = shmget(IPC_PRIVATE, segmentSize, IPC_CREAT | 0777);
if (id == -1)
qWarning("QXcbShmImage: shmget() failed (%d) for size %d (%dx%d)",
@ -122,10 +125,17 @@ QXcbShmImage::QXcbShmImage(QXcbScreen *screen, const QSize &size, uint depth, QI
void QXcbShmImage::destroy()
{
const int segmentSize = m_xcb_image ? (m_xcb_image->stride * m_xcb_image->height) : 0;
if (segmentSize)
Q_XCB_CALL(xcb_shm_detach(xcb_connection(), m_shm_info.shmseg));
xcb_image_destroy(m_xcb_image);
if (segmentSize) {
shmdt(m_shm_info.shmaddr);
shmctl(m_shm_info.shmid, IPC_RMID, 0);
}
if (m_gc)
Q_XCB_CALL(xcb_free_gc(xcb_connection(), m_gc));
}