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glx: Fix the swap event filter for DRI3 drivers

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The drawable field is set to the X drawable ID when the swap event is
synthesized by DRI2WireToEvent(), and the GLX drawable ID when the
event is received over the wire. The latter being the case with DRI3.

__glXWireToEvent() fixes this for Xlib clients by changing the field
to the X drawable ID. This doesn't work for xcb clients however,
so we have to expect the field to be set to either the X or the GLX
drawable ID.

BUG: 342582
This commit is contained in:
Fredrik Höglund 2015-01-08 07:12:20 +01:00 committed by David Edmundson
parent 9fe660ac5c
commit 301a996563
2 changed files with 11 additions and 6 deletions
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13
glxbackend.cpp
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@ -41,7 +41,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include <QOpenGLContext>
// system
#include <unistd.h>
#include <xcb/glx.h>
#include <deque>
#include <algorithm>
@ -79,9 +78,10 @@ namespace std {
namespace KWin
{
SwapEventFilter::SwapEventFilter(xcb_drawable_t drawable)
SwapEventFilter::SwapEventFilter(xcb_drawable_t drawable, xcb_glx_drawable_t glxDrawable)
: X11EventFilter(Xcb::Extensions::self()->glxEventBase() + XCB_GLX_BUFFER_SWAP_COMPLETE),
m_drawable(drawable)
m_drawable(drawable),
m_glxDrawable(glxDrawable)
{
}
@ -90,7 +90,10 @@ bool SwapEventFilter::event(xcb_generic_event_t *event)
xcb_glx_buffer_swap_complete_event_t *ev =
reinterpret_cast<xcb_glx_buffer_swap_complete_event_t *>(event);
if (ev->drawable == m_drawable) {
// The drawable field is the X drawable when the event was synthesized
// by a WireToEvent handler, and the GLX drawable when the event was
// received over the wire
if (ev->drawable == m_drawable || ev->drawable == m_glxDrawable) {
Compositor::self()->bufferSwapComplete();
return true;
}
@ -192,7 +195,7 @@ void GlxBackend::init()
}
if (m_haveINTELSwapEvent) {
m_swapEventFilter = std::make_unique<SwapEventFilter>(window);
m_swapEventFilter = std::make_unique<SwapEventFilter>(window, glxWindow);
glXSelectEvent(display(), glxWindow, GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK);
}

4
glxbackend.h
View file

@ -22,6 +22,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "scene_opengl.h"
#include "x11eventfilter.h"
#include <xcb/glx.h>
#include <memory>
namespace KWin
@ -44,11 +45,12 @@ public:
class SwapEventFilter : public X11EventFilter
{
public:
SwapEventFilter(xcb_drawable_t drawable);
SwapEventFilter(xcb_drawable_t drawable, xcb_glx_drawable_t glxDrawable);
bool event(xcb_generic_event_t *event) override;
private:
xcb_drawable_t m_drawable;
xcb_glx_drawable_t m_glxDrawable;
};