Add support for QPlatformNativeInterface.

Initial bits to enable figuring out the EGL display and context.

Change-Id: I4b578e356dceb40b4456f0590d32c8df1f51fa53
Reviewed-by: Andy Nichols <andy.nichols@nokia.com>

src/plugins/platforms/kms/kms.pro

@@ -18,7 +18,8 @@ SOURCES =   main.cpp \
             qkmscursor.cpp \
             qkmsdevice.cpp \
             qkmsbuffermanager.cpp \
-            qkmsbackingstore.cpp
+            qkmsbackingstore.cpp \
+            qkmsnativeinterface.cpp
 HEADERS =   qkmsintegration.h \
             qkmsscreen.h \
             qkmscontext.h \
@@ -26,7 +27,8 @@ HEADERS =   qkmsintegration.h \
             qkmscursor.h \
             qkmsdevice.h \
             qkmsbuffermanager.h \
-            qkmsbackingstore.h
+            qkmsbackingstore.h \
+            qkmsnativeinterface.h
 
 target.path += $$[QT_INSTALL_PLUGINS]/platforms
 INSTALLS += target

src/plugins/platforms/kms/qkmsintegration.cpp

@@ -45,6 +45,7 @@
 #include "qkmswindow.h"
 #include "qkmsbackingstore.h"
 #include "qkmscontext.h"
+#include "qkmsnativeinterface.h"
 
 #include <QtPlatformSupport/private/qgenericunixprintersupport_p.h>
 #include <QtPlatformSupport/private/qgenericunixeventdispatcher_p.h>
@@ -58,7 +59,8 @@ QT_BEGIN_NAMESPACE
 QKmsIntegration::QKmsIntegration()
     : QPlatformIntegration(),
       m_fontDatabase(new QGenericUnixFontDatabase()),
-      m_eventDispatcher(createUnixEventDispatcher())
+      m_eventDispatcher(createUnixEventDispatcher()),
+      m_nativeInterface(new QKmsNativeInterface)
 {
     QGuiApplicationPrivate::instance()->setEventDispatcher(m_eventDispatcher);
     setenv("EGL_PLATFORM", "drm",1);
@@ -129,4 +131,9 @@ QAbstractEventDispatcher *QKmsIntegration::guiThreadEventDispatcher() const
     return m_eventDispatcher;
 }
 
+QPlatformNativeInterface *QKmsIntegration::nativeInterface() const
+{
+    return m_nativeInterface;
+}
+
 QT_END_NAMESPACE

src/plugins/platforms/kms/qkmsintegration.h

@@ -43,6 +43,7 @@
 #define QPLATFORMINTEGRATION_KMS_H
 
 #include <QtGui/QPlatformIntegration>
+#include <QtGui/QPlatformNativeInterface>
 
 QT_BEGIN_NAMESPACE
 
@@ -66,6 +67,8 @@ public:
 
     void addScreen(QKmsScreen *screen);
 
+    QPlatformNativeInterface *nativeInterface() const;
+
 private:
     QStringList findDrmDevices();
 
@@ -73,6 +76,7 @@ private:
     QList<QKmsDevice *> m_devices;
     QPlatformFontDatabase *m_fontDatabase;
     QAbstractEventDispatcher *m_eventDispatcher;
+    QPlatformNativeInterface *m_nativeInterface;
 };
 
 QT_END_NAMESPACE

src/plugins/platforms/kms/qkmsnativeinterface.cpp

@@ -0,0 +1,105 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <private/qguiapplication_p.h>
+#include "qkmsnativeinterface.h"
+#include "qkmsdevice.h"
+
+#include "qscreen.h"
+
+class QKmsResourceMap : public QMap<QByteArray, QKmsNativeInterface::ResourceType>
+{
+public:
+    QKmsResourceMap()
+        :QMap<QByteArray, QKmsNativeInterface::ResourceType>()
+    {
+        insert("egldisplay", QKmsNativeInterface::EglDisplay);
+        insert("eglcontext", QKmsNativeInterface::EglContext);
+    }
+};
+
+Q_GLOBAL_STATIC(QKmsResourceMap, qKmsResourceMap)
+
+void *QKmsNativeInterface::nativeResourceForWindow(const QByteArray &resourceString, QWindow *window)
+{
+    QByteArray lowerCaseResource = resourceString.toLower();
+    ResourceType resource = qKmsResourceMap()->value(lowerCaseResource);
+    void *result = 0;
+    switch (resource) {
+    case EglDisplay:
+        result = eglDisplayForWindow(window);
+        break;
+    case EglContext:
+        result = eglContextForWindow(window);
+        break;
+    default:
+        result = 0;
+    }
+    return result;
+}
+
+void *QKmsNativeInterface::eglDisplayForWindow(QWindow *window)
+{
+    QKmsScreen *screen = qPlatformScreenForWindow(window);
+    if (!screen)
+        return 0;
+    QKmsDevice *device = screen->device();
+    if (!device)
+        return 0;
+    return device->eglDisplay();
+}
+
+void *QKmsNativeInterface::eglContextForWindow(QWindow *window)
+{
+    QKmsScreen *screen = qPlatformScreenForWindow(window);
+    if (!screen)
+        return 0;
+    QKmsDevice *device = screen->device();
+    if (!device)
+        return 0;
+    return device->eglContext();
+}
+
+QKmsScreen *QKmsNativeInterface::qPlatformScreenForWindow(QWindow *window)
+{
+    QScreen *screen = window ? window->screen() : QGuiApplication::primaryScreen();
+    return static_cast<QKmsScreen *>(screen->handle());
+}

src/plugins/platforms/kms/qkmsnativeinterface.h

@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QKMSNATIVEINTERFACE_H
+#define QKMSNATIVEINTERFACE_H
+
+#include "qkmsscreen.h"
+
+#include <QtGui/QPlatformNativeInterface>
+
+class QKmsNativeInterface : public QPlatformNativeInterface
+{
+public:
+    enum ResourceType {
+        EglDisplay,
+        EglContext
+    };
+
+    void *nativeResourceForWindow(const QByteArray &resourceString, QWindow *window);
+
+    void *eglDisplayForWindow(QWindow *window);
+    void *eglContextForWindow(QWindow *window);
+
+private:
+    static QKmsScreen *qPlatformScreenForWindow(QWindow *window);
+};
+
+
+#endif // QKMSNATIVEINTERFACE_H