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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 213 insertions, 0 deletions

diff --git a/src/opengl/qwindowsurface_x11gl.cpp b/src/opengl/qwindowsurface_x11gl.cpp
new file mode 100644
index 0000000000..78603f9d11
--- /dev/null
+++ b/src/opengl/qwindowsurface_x11gl.cpp
@@ -0,0 +1,213 @@
+/****************************************************************************
+**
+** 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 QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QTime>
+#include <QDebug>
+
+#include <private/qt_x11_p.h>
+#include <private/qimagepixmapcleanuphooks_p.h>
+
+#include "qwindowsurface_x11gl_p.h"
+#include "qpixmapdata_x11gl_p.h"
+
+QT_BEGIN_NAMESPACE
+
+QX11GLWindowSurface::QX11GLWindowSurface(QWidget* window)
+    : QWindowSurface(window), m_windowGC(0), m_pixmapGC(0), m_window(window)
+{
+}
+
+QX11GLWindowSurface::~QX11GLWindowSurface()
+{
+    if (m_windowGC)
+        XFree(m_windowGC);
+    if (m_pixmapGC)
+        XFree(m_pixmapGC);
+}
+
+QPaintDevice *QX11GLWindowSurface::paintDevice()
+{
+    return &m_backBuffer;
+}
+
+extern void *qt_getClipRects(const QRegion &r, int &num); // in qpaintengine_x11.cpp
+
+void QX11GLWindowSurface::flush(QWidget *widget, const QRegion &widgetRegion, const QPoint &offset)
+{
+    // We don't need to know the widget which initiated the flush. Instead we just use the offset
+    // to translate the widgetRegion:
+    Q_UNUSED(widget);
+
+    if (m_backBuffer.isNull()) {
+        qDebug("QX11GLWindowSurface::flush() - backBuffer is null, not flushing anything");
+        return;
+    }
+
+    Q_ASSERT(window()->size() != m_backBuffer.size());
+
+    // Wait for all GL rendering to the back buffer pixmap to complete before trying to
+    // copy it to the window. We do this by making sure the pixmap's context is current
+    // and then call eglWaitClient. The EGL 1.4 spec says eglWaitClient doesn't have to
+    // block, just that "All rendering calls...are guaranteed to be executed before native
+    // rendering calls". This makes it potentially less expensive than glFinish.
+    QGLContext* ctx = static_cast<QX11GLPixmapData*>(m_backBuffer.data_ptr().data())->context();
+    if (QGLContext::currentContext() != ctx && ctx && ctx->isValid())
+        ctx->makeCurrent();
+    eglWaitClient();
+
+    if (m_windowGC == 0) {
+        XGCValues attribs;
+        attribs.graphics_exposures = False;
+        m_windowGC = XCreateGC(X11->display, m_window->handle(), GCGraphicsExposures, &attribs);
+    }
+
+    int rectCount;
+    XRectangle *rects = (XRectangle *)qt_getClipRects(widgetRegion, rectCount);
+    if (rectCount <= 0)
+        return;
+
+    XSetClipRectangles(X11->display, m_windowGC, 0, 0, rects, rectCount, YXBanded);
+
+    QRect dirtyRect = widgetRegion.boundingRect().translated(-offset);
+    XCopyArea(X11->display, m_backBuffer.handle(), m_window->handle(), m_windowGC,
+              dirtyRect.x(), dirtyRect.y(), dirtyRect.width(), dirtyRect.height(),
+              dirtyRect.x(), dirtyRect.y());
+
+    // Make sure the blit of the update from the back buffer to the window completes
+    // before allowing rendering to start again to the back buffer. Otherwise the GPU
+    // might start rendering to the back buffer again while the blit takes place.
+    eglWaitNative(EGL_CORE_NATIVE_ENGINE);
+}
+
+void QX11GLWindowSurface::setGeometry(const QRect &rect)
+{
+    if (rect.width() > m_backBuffer.size().width() || rect.height() > m_backBuffer.size().height()) {
+        QX11GLPixmapData *pd = new QX11GLPixmapData;
+        QSize newSize = rect.size();
+        pd->resize(newSize.width(), newSize.height());
+        m_backBuffer = QPixmap(pd);
+        if (window()->testAttribute(Qt::WA_TranslucentBackground))
+            m_backBuffer.fill(Qt::transparent);
+        if (m_pixmapGC) {
+            XFreeGC(X11->display, m_pixmapGC);
+            m_pixmapGC = 0;
+        }
+    }
+
+    QWindowSurface::setGeometry(rect);
+}
+
+bool QX11GLWindowSurface::scroll(const QRegion &area, int dx, int dy)
+{
+    if (m_backBuffer.isNull())
+        return false;
+
+    Q_ASSERT(m_backBuffer.data_ptr()->classId() == QPixmapData::X11Class);
+
+    // Make sure all GL rendering is complete before starting the scroll operation:
+    QGLContext* ctx = static_cast<QX11GLPixmapData*>(m_backBuffer.data_ptr().data())->context();
+    if (QGLContext::currentContext() != ctx && ctx && ctx->isValid())
+        ctx->makeCurrent();
+    eglWaitClient();
+
+    if (!m_pixmapGC)
+        m_pixmapGC = XCreateGC(X11->display, m_backBuffer.handle(), 0, 0);
+
+    foreach (const QRect& rect, area.rects()) {
+        XCopyArea(X11->display, m_backBuffer.handle(), m_backBuffer.handle(), m_pixmapGC,
+                  rect.x(), rect.y(), rect.width(), rect.height(),
+                  rect.x()+dx, rect.y()+dy);
+    }
+
+    // Make sure the scroll operation is complete before allowing GL rendering to resume
+    eglWaitNative(EGL_CORE_NATIVE_ENGINE);
+
+    return true;
+}
+
+
+QPixmap QX11GLWindowSurface::grabWidget(const QWidget *widget, const QRect& rect) const
+{
+    if (!widget || m_backBuffer.isNull())
+        return QPixmap();
+
+    QRect srcRect;
+
+    // make sure the rect is inside the widget & clip to widget's rect
+    if (!rect.isEmpty())
+        srcRect = rect & widget->rect();
+    else
+        srcRect = widget->rect();
+
+    if (srcRect.isEmpty())
+        return QPixmap();
+
+    // If it's a child widget we have to translate the coordinates
+    if (widget != window())
+        srcRect.translate(widget->mapTo(window(), QPoint(0, 0)));
+
+    QPixmap::x11SetDefaultScreen(widget->x11Info().screen());
+
+    QX11PixmapData *pmd = new QX11PixmapData(QPixmapData::PixmapType);
+    pmd->resize(srcRect.width(), srcRect.height());
+    QPixmap px(pmd);
+
+    GC tmpGc = XCreateGC(X11->display, m_backBuffer.handle(), 0, 0);
+
+    // Make sure all GL rendering is complete before copying the window
+    QGLContext* ctx = static_cast<QX11GLPixmapData*>(m_backBuffer.pixmapData())->context();
+    if (QGLContext::currentContext() != ctx && ctx && ctx->isValid())
+        ctx->makeCurrent();
+    eglWaitClient();
+
+    // Copy srcRect from the backing store to the new pixmap
+    XSetGraphicsExposures(X11->display, tmpGc, False);
+    XCopyArea(X11->display, m_backBuffer.handle(), px.handle(), tmpGc,
+              srcRect.x(), srcRect.y(), srcRect.width(), srcRect.height(), 0, 0);
+    XFreeGC(X11->display, tmpGc);
+
+    // Wait until the copy has finised before allowing more rendering into the back buffer
+    eglWaitNative(EGL_CORE_NATIVE_ENGINE);
+
+    return px;
+}
+
+QT_END_NAMESPACE