diff options
| author | Erik Kurzinger <ekurzinger@nvidia.com> | 2019-06-13 08:15:50 -0700 |
|---|---|---|
| committer | Erik Kurzinger <ekurzinger@nvidia.com> | 2019-06-13 08:20:41 -0700 |
| commit | 0c1831178540462da31fd7a4b6d2e446bc84498b (patch) | |
| tree | ca26793758f6f196d6df4fe1d6d6c4f7c19ca22f /src/plugins/platforms/xcb/gl_integrations/xcb_glx | |
| parent | 1640973a826eccbefb8743bba6c5662a7b4e9fe9 (diff) | |
Track swap interval in QXcbWindow
As per GLX_EXT_swap_control, the GLX swap interval is specified on a
per-drawable basis. However, QGLXContext only tracks it per-context
using the m_swapInterval member. If a new drawable is made current to a
context, it is still necessary to call glXSwapIntervalEXT to change the
swap interval, even if it has been previously called for the same
context with a different drawable. However, currently,
QGLXContext::makeCurrent doesn't do this if its m_swapInterval field
matches the new swap interval. This change removes m_swapInterval from
QGLXContext, instead tracking it in QXcbWindow. This still avoids
unnecessary calls to glXSwapIntervalEXT, while ensuring the swap
interval is always set for new window drawables.
Change-Id: Idc34101476c6af618059f6f3d8925dee743994a3
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Diffstat (limited to 'src/plugins/platforms/xcb/gl_integrations/xcb_glx')
| -rw-r--r-- | src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp | 6 | ||||
| -rw-r--r-- | src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.h | 1 |
2 files changed, 3 insertions, 4 deletions
diff --git a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp index 4adf662152..f26f698e76 100644 --- a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp +++ b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.cpp @@ -204,7 +204,6 @@ QGLXContext::QGLXContext(QXcbScreen *screen, const QSurfaceFormat &format, QPlat , m_shareContext(0) , m_format(format) , m_isPBufferCurrent(false) - , m_swapInterval(-1) , m_ownsContext(nativeHandle.isNull()) , m_getGraphicsResetStatus(0) , m_lost(false) @@ -567,9 +566,9 @@ bool QGLXContext::makeCurrent(QPlatformSurface *surface) if (success && surfaceClass == QSurface::Window) { int interval = surface->format().swapInterval(); + QXcbWindow *window = static_cast<QXcbWindow *>(surface); QXcbScreen *screen = screenForPlatformSurface(surface); - if (interval >= 0 && m_swapInterval != interval && screen) { - m_swapInterval = interval; + if (interval >= 0 && interval != window->swapInterval() && screen) { typedef void (*qt_glXSwapIntervalEXT)(Display *, GLXDrawable, int); typedef void (*qt_glXSwapIntervalMESA)(unsigned int); static qt_glXSwapIntervalEXT glXSwapIntervalEXT = 0; @@ -588,6 +587,7 @@ bool QGLXContext::makeCurrent(QPlatformSurface *surface) glXSwapIntervalEXT(m_display, glxDrawable, interval); else if (glXSwapIntervalMESA) glXSwapIntervalMESA(interval); + window->setSwapInterval(interval); } } diff --git a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.h b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.h index be9d3f5dcb..2a88fd6e59 100644 --- a/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.h +++ b/src/plugins/platforms/xcb/gl_integrations/xcb_glx/qglxintegration.h @@ -87,7 +87,6 @@ private: GLXContext m_shareContext; QSurfaceFormat m_format; bool m_isPBufferCurrent; - int m_swapInterval; bool m_ownsContext; GLenum (APIENTRY * m_getGraphicsResetStatus)(); bool m_lost; |