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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtOpenGL module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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
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