Merge remote-tracking branch 'origin/stable' into dev

For the conflicts in msvc_nmake.cpp the ifdefs are extended since we
need to support windows phone in the target branch while it is not there
in the current stable branch (as of Qt 5.2).

Conflicts:
	configure
	qmake/generators/win32/msvc_nmake.cpp
	src/3rdparty/angle/src/libEGL/Surface.cpp
	src/angle/src/common/common.pri
	src/corelib/global/qglobal.h
	src/corelib/io/qstandardpaths.cpp
	src/plugins/platforms/qnx/qqnxintegration.cpp
	src/plugins/platforms/qnx/qqnxscreeneventhandler.h
	src/plugins/platforms/xcb/qglxintegration.h
	src/widgets/kernel/win.pri
	tests/auto/corelib/thread/qreadwritelock/tst_qreadwritelock.cpp
	tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp
	tests/auto/gui/text/qtextdocument/tst_qtextdocument.cpp
	tools/configure/configureapp.cpp

Change-Id: I00b579eefebaf61d26ab9b00046d2b5bd5958812

1 files changed, 80 insertions, 0 deletions

diff --git a/src/plugins/platforms/xcb/qglxintegration.cpp b/src/plugins/platforms/xcb/qglxintegration.cpp
index 5fc5b4ba97..3f1c53b122 100644
--- a/src/plugins/platforms/xcb/qglxintegration.cpp
+++ b/src/plugins/platforms/xcb/qglxintegration.cpp
@@ -440,6 +440,86 @@ bool QGLXContext::isValid() const
     return m_context != 0;
 }
 
+bool QGLXContext::m_queriedDummyContext = false;
+bool QGLXContext::m_supportsThreading = true;
+
+
+// If this list grows to any significant size, change it a
+// proper string table and make the implementation below use
+// binary search.
+static const char *qglx_threadedgl_blacklist_renderer[] = {
+    "Chromium",                             // QTBUG-32225 (initialization fails)
+    "Mesa DRI Intel(R) Sandybridge Mobile", // QTBUG-34492 (flickering in fullscreen)
+    0
+};
+
+static const char *qglx_threadedgl_blacklist_vendor[] = {
+    "nouveau",                             // QTCREATORBUG-10875 (crash in creator)
+    0
+};
+
+void QGLXContext::queryDummyContext()
+{
+    if (m_queriedDummyContext)
+        return;
+    m_queriedDummyContext = true;
+
+    static bool skip = qEnvironmentVariableIsSet("QT_OPENGL_NO_SANITY_CHECK");
+    if (skip)
+        return;
+
+    QOpenGLContext *oldContext = QOpenGLContext::currentContext();
+    QSurface *oldSurface = 0;
+    if (oldContext)
+        oldSurface = oldContext->surface();
+
+    QScopedPointer<QSurface> surface;
+    const char *glxvendor = glXGetClientString(glXGetCurrentDisplay(), GLX_VENDOR);
+    if (glxvendor && !strcmp(glxvendor, "ATI")) {
+        QWindow *window = new QWindow;
+        window->resize(64, 64);
+        window->setSurfaceType(QSurface::OpenGLSurface);
+        window->create();
+        surface.reset(window);
+    } else {
+        QOffscreenSurface *offSurface = new QOffscreenSurface;
+        offSurface->create();
+        surface.reset(offSurface);
+    }
+
+    QOpenGLContext context;
+    context.create();
+    context.makeCurrent(surface.data());
+
+    m_supportsThreading = true;
+
+    const char *renderer = (const char *) glGetString(GL_RENDERER);
+    for (int i = 0; qglx_threadedgl_blacklist_renderer[i]; ++i) {
+        if (strstr(renderer, qglx_threadedgl_blacklist_renderer[i]) != 0) {
+            m_supportsThreading = false;
+            break;
+        }
+    }
+
+    const char *vendor = (const char *) glGetString(GL_VENDOR);
+    for (int i = 0; qglx_threadedgl_blacklist_vendor[i]; ++i) {
+        if (strstr(vendor, qglx_threadedgl_blacklist_vendor[i]) != 0) {
+            m_supportsThreading = false;
+            break;
+        }
+    }
+
+    context.doneCurrent();
+    if (oldContext && oldSurface)
+        oldContext->makeCurrent(oldSurface);
+}
+
+bool QGLXContext::supportsThreading()
+{
+    if (!m_queriedDummyContext)
+        queryDummyContext();
+    return m_supportsThreading;
+}
 
 QGLXPbuffer::QGLXPbuffer(QOffscreenSurface *offscreenSurface)
     : QPlatformOffscreenSurface(offscreenSurface)