1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
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
|
