Initial support for Qt using Kernel Mode-setting (KMS)

This platform plugin supports fullscreen OpenGLES2 windows on devices
that support Kernel Mode-setting.

Change-Id: I7d4077319654c13851f0ff7ec0228b7b13936382
Reviewed-on: http://codereview.qt.nokia.com/2516
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Jørgen Lind <jorgen.lind@nokia.com>

1 files changed, 131 insertions, 0 deletions

diff --git a/src/plugins/platforms/kms/qkmscursor.cpp b/src/plugins/platforms/kms/qkmscursor.cpp
new file mode 100644
index 0000000000..91c23b0f1c
--- /dev/null
+++ b/src/plugins/platforms/kms/qkmscursor.cpp
@@ -0,0 +1,131 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** 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 <QDebug>
+#include "qkmscursor.h"
+#include "qkmsscreen.h"
+#include "qkmsdevice.h"
+
+QT_BEGIN_NAMESPACE
+
+QKmsCursor::QKmsCursor(QKmsScreen *screen)
+    : QPlatformCursor(screen), m_screen(screen),
+      m_graphicsBufferManager(screen->device()->gbmDevice())
+{
+    gbm_bo *bo = gbm_bo_create(m_graphicsBufferManager, 64, 64,
+                               GBM_BO_FORMAT_ARGB8888,
+                               GBM_BO_USE_CURSOR_64X64 | GBM_BO_USE_RENDERING);
+
+    m_eglImage = eglCreateImageKHR(m_screen->device()->eglDisplay(), 0, EGL_NATIVE_PIXMAP_KHR,
+                                   bo, 0);
+    gbm_bo_destroy(bo);
+    m_cursorImage = new QPlatformCursorImage(0, 0, 0, 0, 0, 0);
+}
+
+void QKmsCursor::pointerEvent(const QMouseEvent &event)
+{
+    int status = drmModeMoveCursor(m_screen->device()->fd(),
+                                   m_screen->crtcId(),
+                                   event.globalX(),
+                                   event.globalY());
+    if (status) {
+        qWarning("failed to move cursor: %d", status);
+    }
+}
+
+void QKmsCursor::changeCursor(QCursor *widgetCursor, QWindow *window)
+{
+    Q_UNUSED(window)
+
+    if (widgetCursor->shape() != Qt::BitmapCursor) {
+        m_cursorImage->set(widgetCursor->shape());
+    } else {
+        m_cursorImage->set(widgetCursor->pixmap().toImage(),
+                           widgetCursor->hotSpot().x(),
+                           widgetCursor->hotSpot().y());
+    }
+
+    if ((m_cursorImage->image()->width() > 64) || (m_cursorImage->image()->width() > 64)) {
+        qWarning("failed to set hardware cursor: larger than 64x64.");
+        return;
+    }
+
+    QImage cursorImage = m_cursorImage->image()->convertToFormat(QImage::Format_RGB32);
+
+    //Load cursor image into EGLImage
+    GLuint cursorTexture;
+    glGenTextures(1, &cursorTexture);
+    glBindTexture(GL_TEXTURE_2D, cursorTexture);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+
+    //TODO: Format may be wrong here, need a color icon to test.
+    if (m_eglImage != EGL_NO_IMAGE_KHR) {
+        glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, m_eglImage);
+        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, cursorImage.width(),
+                        cursorImage.height(), GL_RGBA,
+                        GL_UNSIGNED_BYTE, cursorImage.constBits());
+    } else {
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, cursorImage.width(),
+                     cursorImage.height(), 0, GL_RGBA,
+                     GL_UNSIGNED_BYTE, cursorImage.constBits());
+    }
+
+    //EGLImage needs to contain sprite before calling this:
+    gbm_bo *bufferObject = gbm_bo_create_from_egl_image(m_graphicsBufferManager,
+                                                        m_screen->device()->eglDisplay(),
+                                                        m_eglImage, 64, 64,
+                                                        GBM_BO_USE_CURSOR_64X64);
+    quint32 handle = gbm_bo_get_handle(bufferObject).u32;
+
+    gbm_bo_destroy(bufferObject);
+
+    int status = drmModeSetCursor(m_screen->device()->fd(),
+                                  m_screen->crtcId(), handle, 64, 64);
+
+    if (status) {
+        qWarning("failed to set cursor: %d", status);
+    }
+}
+
+QT_END_NAMESPACE