1 files changed, 276 insertions, 0 deletions
diff --git a/src/plugins/platforms/bsdfb/qbsdfbscreen.cpp b/src/plugins/platforms/bsdfb/qbsdfbscreen.cpp
new file mode 100644
index 0000000000..ee2dce6867
--- /dev/null
+++ b/src/plugins/platforms/bsdfb/qbsdfbscreen.cpp
@@ -0,0 +1,276 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2015-2016 Oleksandr Tymoshenko <gonzo@bluezbox.com>
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qbsdfbscreen.h"
+#include <QtPlatformSupport/private/qfbcursor_p.h>
+#include <QtPlatformSupport/private/qfbwindow_p.h>
+#include <QtCore/QRegularExpression>
+#include <QtGui/QPainter>
+
+#include <private/qcore_unix_p.h> // overrides QT_OPEN
+#include <qimage.h>
+#include <qdebug.h>
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <limits.h>
+#include <signal.h>
+
+#include <sys/consio.h>
+#include <sys/fbio.h>
+
+QT_BEGIN_NAMESPACE
+
+enum {
+    DefaultDPI = 100
+};
+
+static int openFramebufferDevice(const QString &dev)
+{
+    const QByteArray devPath = QFile::encodeName(dev);
+
+    int fd = QT_OPEN(devPath.constData(), O_RDWR);
+
+    if (fd == -1)
+        fd = QT_OPEN(devPath.constData(), O_RDONLY);
+
+    return fd;
+}
+
+static QRect determineGeometry(const struct fbtype &fb, const QRect &userGeometry)
+{
+    int xoff = 0;
+    int yoff = 0;
+    int w = 0;
+    int h = 0;
+
+    if (userGeometry.isValid()) {
+        w = qMin(userGeometry.width(), fb.fb_width);
+        h = qMin(userGeometry.height(), fb.fb_height);
+
+        int xxoff = userGeometry.x(), yyoff = userGeometry.y();
+        if (xxoff != 0 || yyoff != 0) {
+            if (xxoff < 0 || xxoff + w > fb.fb_width)
+                xxoff = fb.fb_width - w;
+            if (yyoff < 0 || yyoff + h > fb.fb_height)
+                yyoff = fb.fb_height - h;
+            xoff += xxoff;
+            yoff += yyoff;
+        } else {
+            xoff += (fb.fb_width - w)/2;
+            yoff += (fb.fb_height - h)/2;
+        }
+    } else {
+        w = fb.fb_width;
+        h = fb.fb_height;
+    }
+
+    if (w == 0 || h == 0) {
+        qWarning("Unable to find screen geometry, using 320x240");
+        w = 320;
+        h = 240;
+    }
+
+    return QRect(xoff, yoff, w, h);
+}
+
+static QSizeF determinePhysicalSize(const QSize &mmSize, const QSize &res)
+{
+    int mmWidth = mmSize.width();
+    int mmHeight = mmSize.height();
+
+    if (mmWidth <= 0 && mmHeight <= 0) {
+        const int dpi = DefaultDPI;
+        mmWidth = qRound(res.width() * 25.4 / dpi);
+        mmHeight = qRound(res.height() * 25.4 / dpi);
+    } else if (mmWidth > 0 && mmHeight <= 0) {
+        mmHeight = res.height() * mmWidth/res.width();
+    } else if (mmHeight > 0 && mmWidth <= 0) {
+        mmWidth = res.width() * mmHeight/res.height();
+    }
+
+    return QSize(mmWidth, mmHeight);
+}
+
+QBsdFbScreen::QBsdFbScreen(const QStringList &args)
+    : m_arguments(args)
+{
+}
+
+QBsdFbScreen::~QBsdFbScreen()
+{
+    if (m_framebufferFd != -1) {
+        munmap(m_mmap.data - m_mmap.offset, m_mmap.size);
+        qt_safe_close(m_framebufferFd);
+    }
+}
+
+bool QBsdFbScreen::initialize()
+{
+    QRegularExpression fbRx(QLatin1String("fb=(.*)"));
+    QRegularExpression mmSizeRx(QLatin1String("mmsize=(\\d+)x(\\d+)"));
+    QRegularExpression sizeRx(QLatin1String("size=(\\d+)x(\\d+)"));
+    QRegularExpression offsetRx(QLatin1String("offset=(\\d+)x(\\d+)"));
+
+    QString fbDevice;
+    QSize userMmSize;
+    QRect userGeometry;
+
+    // Parse arguments
+    for (const QString &arg : qAsConst(m_arguments)) {
+        QRegularExpressionMatch match;
+        if (arg.contains(mmSizeRx, &match))
+            userMmSize = QSize(match.captured(1).toInt(), match.captured(2).toInt());
+        else if (arg.contains(sizeRx, &match))
+            userGeometry.setSize(QSize(match.captured(1).toInt(), match.captured(2).toInt()));
+        else if (arg.contains(offsetRx, &match))
+            userGeometry.setTopLeft(QPoint(match.captured(1).toInt(), match.captured(2).toInt()));
+        else if (arg.contains(fbRx, &match))
+            fbDevice = match.captured(1);
+    }
+
+    if (!fbDevice.isEmpty()) {
+        // Open the device
+        m_framebufferFd = openFramebufferDevice(fbDevice);
+    } else {
+        m_framebufferFd = STDIN_FILENO;
+    }
+
+    if (m_framebufferFd == -1) {
+        qErrnoWarning(errno, "Failed to open framebuffer %s", qPrintable(fbDevice));
+        return false;
+    }
+
+    struct fbtype fb;
+    if (ioctl(m_framebufferFd, FBIOGTYPE, &fb) != 0) {
+        qErrnoWarning(errno, "Error reading framebuffer information");
+        return false;
+    }
+
+    int line_length = 0;
+    if (ioctl(m_framebufferFd, FBIO_GETLINEWIDTH, &line_length) != 0) {
+        qErrnoWarning(errno, "Error reading line length information");
+        return false;
+    }
+
+    mDepth = fb.fb_depth;
+
+    m_bytesPerLine = line_length;
+    const QRect geometry = determineGeometry(fb, userGeometry);
+    mGeometry = QRect(QPoint(0, 0), geometry.size());
+    switch (mDepth) {
+    case 32:
+        mFormat = QImage::Format_RGB32;
+        break;
+    case 24:
+        mFormat = QImage::Format_RGB888;
+        break;
+    case 16:
+        // falling back
+    default:
+        mFormat = QImage::Format_RGB16;
+        break;
+    }
+    mPhysicalSize = determinePhysicalSize(userMmSize, geometry.size());
+
+    // mmap the framebuffer
+    const size_t pagemask = getpagesize() - 1;
+    m_mmap.size = (m_bytesPerLine * fb.fb_height + pagemask) & ~pagemask;
+    uchar *data = static_cast<uchar*>(mmap(nullptr, m_mmap.size, PROT_READ | PROT_WRITE, MAP_SHARED, m_framebufferFd, 0));
+    if (data == MAP_FAILED) {
+        qErrnoWarning(errno, "Failed to mmap framebuffer");
+        return false;
+    }
+
+    m_mmap.offset = geometry.y() * m_bytesPerLine + geometry.x() * mDepth / 8;
+    m_mmap.data = data + m_mmap.offset;
+
+    QFbScreen::initializeCompositor();
+    m_onscreenImage = QImage(m_mmap.data, geometry.width(), geometry.height(), m_bytesPerLine, mFormat);
+
+    mCursor = new QFbCursor(this);
+
+    return true;
+}
+
+QRegion QBsdFbScreen::doRedraw()
+{
+    const QRegion touched = QFbScreen::doRedraw();
+
+    if (touched.isEmpty())
+        return touched;
+
+    if (!m_blitter)
+        m_blitter.reset(new QPainter(&m_onscreenImage));
+
+    const auto rects = touched.rects();
+    for (const QRect &rect : rects)
+        m_blitter->drawImage(rect, *mScreenImage, rect);
+    return touched;
+}
+
+// grabWindow() grabs "from the screen" not from the backingstores.
+QPixmap QBsdFbScreen::grabWindow(WId wid, int x, int y, int width, int height) const
+{
+    if (!wid) {
+        if (width < 0)
+            width = m_onscreenImage.width() - x;
+        if (height < 0)
+            height = m_onscreenImage.height() - y;
+        return QPixmap::fromImage(m_onscreenImage).copy(x, y, width, height);
+    }
+
+    const QFbWindow *window = windowForId(wid);
+    if (window) {
+        const QRect geom = window->geometry();
+        if (width < 0)
+            width = geom.width() - x;
+        if (height < 0)
+            height = geom.height() - y;
+        QRect rect(geom.topLeft() + QPoint(x, y), QSize(width, height));
+        rect &= window->geometry();
+        return QPixmap::fromImage(m_onscreenImage).copy(rect);
+    }
+
+    return QPixmap();
+}
+
+QT_END_NAMESPACE