Merge branch '4.6'

Conflicts:
	src/corelib/io/qfsfileengine.cpp
	src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
	src/opengl/opengl.pro

1 files changed, 112 insertions, 6 deletions

diff --git a/src/opengl/qgl_x11egl.cpp b/src/opengl/qgl_x11egl.cpp
index 19026b3..d6281f7 100644
--- a/src/opengl/qgl_x11egl.cpp
+++ b/src/opengl/qgl_x11egl.cpp
@@ -52,6 +52,116 @@
 
 QT_BEGIN_NAMESPACE
 
+
+bool qt_egl_setup_x11_visual(XVisualInfo &vi, EGLDisplay display, EGLConfig config,
+                             const QX11Info &x11Info, bool useArgbVisual);
+//
+// QGLTempContext is a class for creating a temporary GL context
+// (which is needed during QGLWidget initialization to retrieve GL
+// extension info).  Faster to construct than a full QGLWidget.
+//
+class QGLTempContext
+{
+public:
+    QGLTempContext(int screen = 0) :
+        initialized(false),
+        window(0),
+        context(0),
+        surface(0)
+    {
+        display = eglGetDisplay(EGLNativeDisplayType(X11->display));
+
+        if (!eglInitialize(display, NULL, NULL)) {
+            qWarning("QGLTempContext: Unable to initialize EGL display.");
+            return;
+        }
+
+        EGLConfig config;
+        int numConfigs = 0;
+        EGLint attribs[] = {
+            EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+#ifdef QT_OPENGL_ES_2
+            EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+#endif
+            EGL_NONE
+        };
+
+        eglChooseConfig(display, attribs, &config, 1, &numConfigs);
+        if (!numConfigs) {
+            qWarning("QGLTempContext: No EGL configurations available.");
+            return;
+        }
+
+        XVisualInfo visualInfo;
+        XVisualInfo *vi;
+        int numVisuals;
+        EGLint id = 0;
+
+        eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &id);
+        if (id == 0) {
+            // EGL_NATIVE_VISUAL_ID is optional and might not be supported
+            // on some implementations - we'll have to do it the hard way
+            QX11Info xinfo;
+            qt_egl_setup_x11_visual(visualInfo, display, config, xinfo, false);
+        } else {
+            visualInfo.visualid = id;
+        }
+        vi = XGetVisualInfo(X11->display, VisualIDMask, &visualInfo, &numVisuals);
+        if (!vi || numVisuals < 1) {
+            qWarning("QGLTempContext: Unable to get X11 visual info id.");
+            return;
+        }
+
+        window = XCreateWindow(X11->display, RootWindow(X11->display, screen),
+                               0, 0, 1, 1, 0,
+                               vi->depth, InputOutput, vi->visual,
+                               0, 0);
+
+        surface = eglCreateWindowSurface(display, config, (EGLNativeWindowType) window, NULL);
+
+        if (surface == EGL_NO_SURFACE) {
+            qWarning("QGLTempContext: Error creating EGL surface.");
+            XFree(vi);
+            XDestroyWindow(X11->display, window);
+            return;
+        }
+
+        EGLint contextAttribs[] = {
+#ifdef QT_OPENGL_ES_2
+            EGL_CONTEXT_CLIENT_VERSION, 2,
+#endif
+            EGL_NONE
+        };
+        context = eglCreateContext(display, config, 0, contextAttribs);
+        if (context != EGL_NO_CONTEXT
+            && eglMakeCurrent(display, surface, surface, context))
+        {
+            initialized = true;
+        } else {
+            qWarning("QGLTempContext: Error creating EGL context.");
+            eglDestroySurface(display, surface);
+            XDestroyWindow(X11->display, window);
+        }
+        XFree(vi);
+    }
+
+    ~QGLTempContext() {
+        if (initialized) {
+            eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+            eglDestroyContext(display, context);
+            eglDestroySurface(display, surface);
+            XDestroyWindow(X11->display, window);
+        }
+    }
+
+private:
+    bool initialized;
+    Window window;
+    EGLContext context;
+    EGLSurface surface;
+    EGLDisplay display;
+};
+
 bool QGLFormat::hasOpenGLOverlays()
 {
     return false;
@@ -239,7 +349,7 @@ bool qt_egl_setup_x11_visual(XVisualInfo &vi, EGLDisplay display, EGLConfig conf
 
     // If EGL does not know the visual ID, so try to select an appropriate one ourselves, first
     // using XRender if we're supposed to have an alpha, then falling back to XGetVisualInfo
-          
+
 #if !defined(QT_NO_XRENDER)
     if (vi.visualid == 0 && useArgbVisual) {
         // Try to use XRender to find an ARGB visual we can use
@@ -446,12 +556,8 @@ void QGLExtensions::init()
     init_done = true;
 
     // We need a context current to initialize the extensions.
-    QGLWidget tmpWidget;
-    tmpWidget.makeCurrent();
-
+    QGLTempContext context;
     init_extensions();
-
-    tmpWidget.doneCurrent();
 }
 
 // Re-creates the EGL surface if the window ID has changed or if force is true