Remove widgets dependency from eglfs

eglfs uses the (old) OpenGL paint engine for paint operations. This drags in a
QWidget dependency and hence everything bar the kitchen sink. This change
gets eglfs buildable without widget support although anything which relies
on a QPaintDevice will end up rendering nothing to the screen. (Similar
to the QWS simplegl driver)

Change-Id: If7fcdb79038ef7568e771402fd1667bc0318ff5f
Reviewed-by: Jørgen Lind <jorgen.lind@nokia.com>
Reviewed-by: Girish Ramakrishnan <girish.1.ramakrishnan@nokia.com>

3 files changed, 21 insertions, 8 deletions

diff --git a/src/plugins/platforms/eglfs/eglfs.pro b/src/plugins/platforms/eglfs/eglfs.pro
index 8675dc164e..291e09d6ed 100644
--- a/src/plugins/platforms/eglfs/eglfs.pro
+++ b/src/plugins/platforms/eglfs/eglfs.pro
@@ -2,7 +2,11 @@ TARGET = qeglfs
 TEMPLATE = lib
 CONFIG += plugin
 
-QT += opengl core-private gui-private opengl-private platformsupport-private widgets-private
+QT += core-private gui-private platformsupport-private
+
+!contains(QT_CONFIG, no-widgets) {
+    QT += opengl opengl-private widgets-private
+}
 
 DESTDIR = $$QT.gui.plugins/platforms
 
diff --git a/src/plugins/platforms/eglfs/qeglfsbackingstore.cpp b/src/plugins/platforms/eglfs/qeglfsbackingstore.cpp
index 331b768a93..d2e4a47e56 100644
--- a/src/plugins/platforms/eglfs/qeglfsbackingstore.cpp
+++ b/src/plugins/platforms/eglfs/qeglfsbackingstore.cpp
@@ -39,17 +39,19 @@
 **
 ****************************************************************************/
 
-#include <QtOpenGL/private/qgl_p.h>
-
 #include "qeglfsbackingstore.h"
 
+#ifndef QT_NO_WIDGETS
+#include <QtOpenGL/private/qgl_p.h>
+#include <QtOpenGL/private/qglpaintdevice_p.h>
+#endif //QT_NO_WIDGETS
+
 #include <QtGui/QPlatformOpenGLContext>
 #include <QtGui/QScreen>
 
-#include <QtOpenGL/private/qglpaintdevice_p.h>
-
 QT_BEGIN_NAMESPACE
 
+#ifndef QT_NO_WIDGETS
 class QEglFSPaintDevice : public QGLPaintDevice
 {
 public:
@@ -73,15 +75,20 @@ private:
     QEglFSScreen *m_screen;
     QGLContext *m_context;
 };
-
+#endif //QT_NO_WIDGETS
 
 QEglFSBackingStore::QEglFSBackingStore(QWindow *window)
-    : QPlatformBackingStore(window)
+    : QPlatformBackingStore(window),
+      m_paintDevice(0)
 {
 #ifdef QEGL_EXTRA_DEBUG
     qWarning("QEglBackingStore %p, %p", window, window->screen());
 #endif
+#ifdef QT_NO_WIDGETS
+    m_paintDevice = new QImage(0,0);
+#else
     m_paintDevice = new QEglFSPaintDevice(static_cast<QEglFSScreen *>(window->screen()->handle()));
+#endif //QT_NO_WIDGETS
 }
 
 void QEglFSBackingStore::flush(QWindow *window, const QRegion &region, const QPoint &offset)
@@ -92,7 +99,9 @@ void QEglFSBackingStore::flush(QWindow *window, const QRegion &region, const QPo
 #ifdef QEGL_EXTRA_DEBUG
     qWarning("QEglBackingStore::flush %p", window);
 #endif
+#ifndef QT_NO_WIDGETS
     static_cast<QEglFSPaintDevice *>(m_paintDevice)->context()->swapBuffers();
+#endif //QT_NO_WIDGETS
 }
 
 void QEglFSBackingStore::resize(const QSize &size, const QRegion &staticContents)
diff --git a/src/plugins/platforms/eglfs/qeglfsbackingstore.h b/src/plugins/platforms/eglfs/qeglfsbackingstore.h
index 5623a96004..1ae3ecdc61 100644
--- a/src/plugins/platforms/eglfs/qeglfsbackingstore.h
+++ b/src/plugins/platforms/eglfs/qeglfsbackingstore.h
@@ -53,7 +53,7 @@ class QEglFSBackingStore : public QPlatformBackingStore
 {
 public:
     QEglFSBackingStore(QWindow *window);
-    ~QEglFSBackingStore() {}
+    ~QEglFSBackingStore() { delete m_paintDevice; }
 
     QPaintDevice *paintDevice() { return m_paintDevice; }
     void flush(QWindow *window, const QRegion &region, const QPoint &offset);