RedirectedXCompositeWindow::RedirectedXCompositeWindow(const IntSize& size, GLContextNeeded needsContext)
: m_size(size)
, m_window(0)
, m_parentWindow(0)
, m_pixmap(0)
, m_needsContext(needsContext)
, m_surface(0)
, m_needsNewPixmapAfterResize(false)
, m_damage(0)
, m_damageNotifyCallback(0)
, m_damageNotifyData(0)
{
Display* display = GDK_DISPLAY_XDISPLAY(gdk_display_get_default());
Screen* screen = DefaultScreenOfDisplay(display);
// This is based on code from Chromium: src/content/common/gpu/image_transport_surface_linux.cc
XSetWindowAttributes windowAttributes;
windowAttributes.override_redirect = True;
m_parentWindow = XCreateWindow(display,
RootWindowOfScreen(screen),
WidthOfScreen(screen) + 1, 0, 1, 1,
0,
CopyFromParent,
InputOutput,
CopyFromParent,
CWOverrideRedirect,
&windowAttributes);
XMapWindow(display, m_parentWindow);
windowAttributes.event_mask = StructureNotifyMask;
windowAttributes.override_redirect = False;
m_window = XCreateWindow(display,
m_parentWindow,
0, 0, size.width(), size.height(),
0,
CopyFromParent,
InputOutput,
CopyFromParent,
CWEventMask,
&windowAttributes);
XMapWindow(display, m_window);
if (getWindowHashMap().isEmpty())
gdk_window_add_filter(0, reinterpret_cast<GdkFilterFunc>(filterXDamageEvent), 0);
getWindowHashMap().add(m_window, this);
while (1) {
XEvent event;
XWindowEvent(display, m_window, StructureNotifyMask, &event);
if (event.type == MapNotify && event.xmap.window == m_window)
break;
}
XSelectInput(display, m_window, NoEventMask);
XCompositeRedirectWindow(display, m_window, CompositeRedirectManual);
m_damage = XDamageCreate(display, m_window, XDamageReportNonEmpty);
}
RedirectedXCompositeWindow::~RedirectedXCompositeWindow()
{
ASSERT(m_damage);
ASSERT(m_window);
ASSERT(m_parentWindow);
getWindowHashMap().remove(m_window);
if (getWindowHashMap().isEmpty())
gdk_window_remove_filter(0, reinterpret_cast<GdkFilterFunc>(filterXDamageEvent), 0);
Display* display = GLContext::sharedX11Display();
XDamageDestroy(display, m_damage);
XDestroyWindow(display, m_window);
XDestroyWindow(display, m_parentWindow);
cleanupPixmapAndPixmapSurface();
}
static GdkFilterReturn filterXDamageEvent(GdkXEvent* gdkXEvent, GdkEvent* event, void*)
{
XEvent* xEvent = static_cast<XEvent*>(gdkXEvent);
if (xEvent->type != gDamageEventBase + XDamageNotify)
return GDK_FILTER_CONTINUE;
XDamageNotifyEvent* damageEvent = reinterpret_cast<XDamageNotifyEvent*>(xEvent);
WindowHashMap& windowHashMap = getWindowHashMap();
WindowHashMap::iterator i = windowHashMap.find(damageEvent->drawable);
if (i == windowHashMap.end())
return GDK_FILTER_CONTINUE;
i->value->callDamageNotifyCallback();
XDamageSubtract(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()), damageEvent->damage, None, None);
return GDK_FILTER_REMOVE;
}
