Verify the surfaceType before activating the GL context

Verify that the surfaceType() of the QPlatformContext is of type
OpenGLSurface before making the context active. Make it possible
to get the QSurface from a QPlatformSurface, make QPlatformWindow
use that to access the QWindow. Remove the setSurfaceType call from
the eglfs plugin as this hiding a problem.

Change-Id: I08906da052e066bb1f1f042030643c6389ab17d7
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
Reviewed-by: Girish Ramakrishnan <girish.1.ramakrishnan@nokia.com>

10 files changed, 25 insertions, 18 deletions

diff --git a/src/gui/kernel/qplatformsurface.h b/src/gui/kernel/qplatformsurface.h
index a10ae6f1e5..b902f9b1f6 100644
--- a/src/gui/kernel/qplatformsurface.h
+++ b/src/gui/kernel/qplatformsurface.h
@@ -66,12 +66,12 @@ public:
     virtual ~QPlatformSurface();
     virtual QSurfaceFormat format() const = 0;
 
-    QSurface::SurfaceClass surfaceClass() const;
+    QSurface *surface() const;
 
 private:
-    explicit QPlatformSurface(QSurface::SurfaceClass type);
+    explicit QPlatformSurface(QSurface *surface);
 
-    QSurface::SurfaceClass m_type;
+    QSurface *m_surface;
 
     friend class QPlatformWindow;
 };
diff --git a/src/gui/kernel/qplatformsurface_qpa.cpp b/src/gui/kernel/qplatformsurface_qpa.cpp
index 50cdd68ab6..464c971b98 100644
--- a/src/gui/kernel/qplatformsurface_qpa.cpp
+++ b/src/gui/kernel/qplatformsurface_qpa.cpp
@@ -57,12 +57,12 @@ QPlatformSurface::~QPlatformSurface()
 
 }
 
-QSurface::SurfaceClass QPlatformSurface::surfaceClass() const
+QSurface *QPlatformSurface::surface() const
 {
-    return m_type;
+    return m_surface;
 }
 
-QPlatformSurface::QPlatformSurface(QSurface::SurfaceClass type) : m_type(type)
+QPlatformSurface::QPlatformSurface(QSurface *surface) : m_surface(surface)
 {
 }
 
diff --git a/src/gui/kernel/qplatformwindow_qpa.cpp b/src/gui/kernel/qplatformwindow_qpa.cpp
index 4e464d7838..01254966f0 100644
--- a/src/gui/kernel/qplatformwindow_qpa.cpp
+++ b/src/gui/kernel/qplatformwindow_qpa.cpp
@@ -49,7 +49,6 @@ QT_BEGIN_NAMESPACE
 
 class QPlatformWindowPrivate
 {
-    QWindow *window;
     QRect rect;
     friend class QPlatformWindow;
 };
@@ -59,11 +58,10 @@ class QPlatformWindowPrivate
 */
 
 QPlatformWindow::QPlatformWindow(QWindow *window)
-    : QPlatformSurface(QSurface::Window)
+    : QPlatformSurface(window)
     , d_ptr(new QPlatformWindowPrivate)
 {
     Q_D(QPlatformWindow);
-    d->window = window;
     d->rect = window->geometry();
 }
 
@@ -79,8 +77,7 @@ QPlatformWindow::~QPlatformWindow()
 */
 QWindow *QPlatformWindow::window() const
 {
-    Q_D(const QPlatformWindow);
-    return d->window;
+    return static_cast<QWindow *>(m_surface);
 }
 
 /*!
@@ -88,8 +85,7 @@ QWindow *QPlatformWindow::window() const
 */
 QPlatformWindow *QPlatformWindow::parent() const
 {
-    Q_D(const QPlatformWindow);
-    return d->window->parent() ? d->window->parent()->handle() : 0;
+    return window()->parent() ? window()->parent()->handle() : 0;
 }
 
 /*!
@@ -97,8 +93,7 @@ QPlatformWindow *QPlatformWindow::parent() const
 */
 QPlatformScreen *QPlatformWindow::screen() const
 {
-    Q_D(const QPlatformWindow);
-    return d->window->screen()->handle();
+    return window()->screen()->handle();
 }
 
 /*!
@@ -170,8 +165,7 @@ Qt::WindowFlags QPlatformWindow::setWindowFlags(Qt::WindowFlags flags)
 
 bool QPlatformWindow::isExposed() const
 {
-    Q_D(const QPlatformWindow);
-    return d->window->isVisible();
+    return window()->isVisible();
 }
 
 /*!
diff --git a/src/platformsupport/eglconvenience/qeglplatformcontext.cpp b/src/platformsupport/eglconvenience/qeglplatformcontext.cpp
index d8ee996215..2e7baa0e1d 100644
--- a/src/platformsupport/eglconvenience/qeglplatformcontext.cpp
+++ b/src/platformsupport/eglconvenience/qeglplatformcontext.cpp
@@ -71,6 +71,8 @@ QEGLPlatformContext::QEGLPlatformContext(const QSurfaceFormat &format, QPlatform
 
 bool QEGLPlatformContext::makeCurrent(QPlatformSurface *surface)
 {
+    Q_ASSERT(surface->surface()->surfaceType() == QSurface::OpenGLSurface);
+
 #ifdef QEGL_EXTRA_DEBUG
     qWarning("QEglContext::makeCurrent: %p\n",this);
 #endif
diff --git a/src/plugins/platforms/cocoa/qcocoaglcontext.mm b/src/plugins/platforms/cocoa/qcocoaglcontext.mm
index 637678c19e..0292e02ff1 100644
--- a/src/plugins/platforms/cocoa/qcocoaglcontext.mm
+++ b/src/plugins/platforms/cocoa/qcocoaglcontext.mm
@@ -86,6 +86,8 @@ void QCocoaGLContext::swapBuffers(QPlatformSurface *surface)
 
 bool QCocoaGLContext::makeCurrent(QPlatformSurface *surface)
 {
+    Q_ASSERT(surface->surface()->surfaceType() == QSurface::OpenGLSurface);
+
     QCocoaAutoReleasePool pool;
 
     QWindow *window = static_cast<QCocoaWindow *>(surface)->window();
diff --git a/src/plugins/platforms/kms/qkmscontext.cpp b/src/plugins/platforms/kms/qkmscontext.cpp
index e5fd10af64..85e0edeed7 100644
--- a/src/plugins/platforms/kms/qkmscontext.cpp
+++ b/src/plugins/platforms/kms/qkmscontext.cpp
@@ -80,6 +80,8 @@ bool QKmsContext::isValid() const
 
 bool QKmsContext::makeCurrent(QPlatformSurface *surface)
 {
+    Q_ASSERT(surface->surface()->surfaceType() == QSurface::OpenGLSurface);
+
     EGLDisplay display = m_device->eglDisplay();
 
     QPlatformWindow *window = static_cast<QPlatformWindow *>(surface);
diff --git a/src/plugins/platforms/openwfd/qopenwfdglcontext.cpp b/src/plugins/platforms/openwfd/qopenwfdglcontext.cpp
index 1304b9aad8..a7a6b11f2c 100644
--- a/src/plugins/platforms/openwfd/qopenwfdglcontext.cpp
+++ b/src/plugins/platforms/openwfd/qopenwfdglcontext.cpp
@@ -57,6 +57,8 @@ QSurfaceFormat QOpenWFDGLContext::format() const
 
 bool QOpenWFDGLContext::makeCurrent(QPlatformSurface *surface)
 {
+    Q_ASSERT(surface->surface()->surfaceType() == QSurface::OpenGLSurface);
+
     EGLDisplay display = mWfdDevice->eglDisplay();
     EGLContext context = mWfdDevice->eglContext();
     if (!eglMakeCurrent(display,EGL_NO_SURFACE,EGL_NO_SURFACE,context)) {
diff --git a/src/plugins/platforms/qnx/qqnxglcontext.cpp b/src/plugins/platforms/qnx/qqnxglcontext.cpp
index 593180019d..0b030bd5fe 100644
--- a/src/plugins/platforms/qnx/qqnxglcontext.cpp
+++ b/src/plugins/platforms/qnx/qqnxglcontext.cpp
@@ -205,6 +205,8 @@ bool QQnxGLContext::makeCurrent(QPlatformSurface *surface)
 {
     qGLContextDebug() << Q_FUNC_INFO;
 
+    Q_ASSERT(surface->surface()->surfaceType() == QSurface::OpenGLSurface);
+
     // Set current rendering API
     EGLBoolean eglResult = eglBindAPI(EGL_OPENGL_ES_API);
     if (eglResult != EGL_TRUE) {
diff --git a/src/plugins/platforms/windows/qwindowsglcontext.cpp b/src/plugins/platforms/windows/qwindowsglcontext.cpp
index 2528ad949f..cabc5974eb 100644
--- a/src/plugins/platforms/windows/qwindowsglcontext.cpp
+++ b/src/plugins/platforms/windows/qwindowsglcontext.cpp
@@ -1042,6 +1042,9 @@ bool QWindowsGLContext::makeCurrent(QPlatformSurface *surface)
     if (QWindowsContext::verboseGL > 1)
         qDebug("%s context=%p contexts=%d", __FUNCTION__, this, m_windowContexts.size());
 #endif // DEBUG_GL
+
+    Q_ASSERT(surface->surface()->surfaceType() == QSurface::OpenGLSurface);
+
     // Do we already have a DC entry for that window?
     QWindowsWindow *window = static_cast<QWindowsWindow *>(surface);
     const HWND hwnd = window->handle();
diff --git a/src/plugins/platforms/xcb/qglxintegration.cpp b/src/plugins/platforms/xcb/qglxintegration.cpp
index 0144caae3d..cac7018e47 100644
--- a/src/plugins/platforms/xcb/qglxintegration.cpp
+++ b/src/plugins/platforms/xcb/qglxintegration.cpp
@@ -103,7 +103,7 @@ QGLXContext::~QGLXContext()
 
 bool QGLXContext::makeCurrent(QPlatformSurface *surface)
 {
-    Q_ASSERT(surface);
+    Q_ASSERT(surface->surface()->surfaceType() == QSurface::OpenGLSurface);
 
     GLXDrawable glxDrawable = static_cast<QXcbWindow *>(surface)->xcb_window();