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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/****************************************************************************
**
** 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 <private/qglpaintdevice_p.h>
#include <private/qgl_p.h>
#include <private/qglpixelbuffer_p.h>
#include <private/qglframebufferobject_p.h>
#ifdef Q_WS_X11
#include <private/qpixmapdata_x11gl_p.h>
#endif
#if !defined(QT_OPENGL_ES_1)
#include <private/qpixmapdata_gl_p.h>
#include <private/qwindowsurface_gl_p.h>
#endif
QT_BEGIN_NAMESPACE
QGLPaintDevice::QGLPaintDevice()
: m_thisFBO(0)
{
}
QGLPaintDevice::~QGLPaintDevice()
{
}
int QGLPaintDevice::metric(QPaintDevice::PaintDeviceMetric metric) const
{
switch(metric) {
case PdmWidth:
return size().width();
case PdmHeight:
return size().height();
case PdmDepth: {
const QGLFormat f = format();
return f.redBufferSize() + f.greenBufferSize() + f.blueBufferSize() + f.alphaBufferSize();
}
default:
qWarning("QGLPaintDevice::metric() - metric %d not known", metric);
return 0;
}
}
void QGLPaintDevice::beginPaint()
{
// Make sure our context is the current one:
QGLContext *ctx = context();
if (ctx != QGLContext::currentContext())
ctx->makeCurrent();
// Record the currently bound FBO so we can restore it again
// in endPaint() and bind this device's FBO
//
// Note: m_thisFBO could be zero if the paint device is not
// backed by an FBO (e.g. window back buffer). But there could
// be a previous FBO bound to the context which we need to
// explicitly unbind. Otherwise the painting will go into
// the previous FBO instead of to the window.
m_previousFBO = ctx->d_func()->current_fbo;
if (m_previousFBO != m_thisFBO) {
ctx->d_ptr->current_fbo = m_thisFBO;
glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_thisFBO);
}
// Set the default fbo for the context to m_thisFBO so that
// if some raw GL code between beginNativePainting() and
// endNativePainting() calls QGLFramebufferObject::release(),
// painting will revert to the window surface's fbo.
ctx->d_ptr->default_fbo = m_thisFBO;
}
void QGLPaintDevice::ensureActiveTarget()
{
QGLContext* ctx = context();
if (ctx != QGLContext::currentContext())
ctx->makeCurrent();
if (ctx->d_ptr->current_fbo != m_thisFBO) {
ctx->d_ptr->current_fbo = m_thisFBO;
glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_thisFBO);
}
ctx->d_ptr->default_fbo = m_thisFBO;
}
void QGLPaintDevice::endPaint()
{
// Make sure the FBO bound at beginPaint is re-bound again here:
QGLContext *ctx = context();
if (m_previousFBO != ctx->d_func()->current_fbo) {
ctx->d_ptr->current_fbo = m_previousFBO;
glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_previousFBO);
}
ctx->d_ptr->default_fbo = 0;
}
QGLFormat QGLPaintDevice::format() const
{
return context()->format();
}
bool QGLPaintDevice::alphaRequested() const
{
return context()->d_func()->reqFormat.alpha();
}
bool QGLPaintDevice::isFlipped() const
{
return false;
}
////////////////// QGLWidgetGLPaintDevice //////////////////
QGLWidgetGLPaintDevice::QGLWidgetGLPaintDevice()
{
}
QPaintEngine* QGLWidgetGLPaintDevice::paintEngine() const
{
return glWidget->paintEngine();
}
void QGLWidgetGLPaintDevice::setWidget(QGLWidget* w)
{
glWidget = w;
}
void QGLWidgetGLPaintDevice::beginPaint()
{
QGLPaintDevice::beginPaint();
if (!glWidget->d_func()->disable_clear_on_painter_begin && glWidget->autoFillBackground()) {
if (glWidget->testAttribute(Qt::WA_TranslucentBackground))
glClearColor(0.0, 0.0, 0.0, 0.0);
else {
const QColor &c = glWidget->palette().brush(glWidget->backgroundRole()).color();
float alpha = c.alphaF();
glClearColor(c.redF() * alpha, c.greenF() * alpha, c.blueF() * alpha, alpha);
}
if (context()->d_func()->workaround_needsFullClearOnEveryFrame)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
else
glClear(GL_COLOR_BUFFER_BIT);
}
}
void QGLWidgetGLPaintDevice::endPaint()
{
if (glWidget->autoBufferSwap())
glWidget->swapBuffers();
QGLPaintDevice::endPaint();
}
QSize QGLWidgetGLPaintDevice::size() const
{
return glWidget->size();
}
QGLContext* QGLWidgetGLPaintDevice::context() const
{
return const_cast<QGLContext*>(glWidget->context());
}
// returns the QGLPaintDevice for the given QPaintDevice
QGLPaintDevice* QGLPaintDevice::getDevice(QPaintDevice* pd)
{
QGLPaintDevice* glpd = 0;
switch(pd->devType()) {
case QInternal::Widget:
// Should not be called on a non-gl widget:
Q_ASSERT(qobject_cast<QGLWidget*>(static_cast<QWidget*>(pd)));
glpd = &(static_cast<QGLWidget*>(pd)->d_func()->glDevice);
break;
case QInternal::Pbuffer:
glpd = &(static_cast<QGLPixelBuffer*>(pd)->d_func()->glDevice);
break;
case QInternal::FramebufferObject:
glpd = &(static_cast<QGLFramebufferObject*>(pd)->d_func()->glDevice);
break;
case QInternal::Pixmap: {
#if !defined(QT_OPENGL_ES_1)
QPixmapData* pmd = static_cast<QPixmap*>(pd)->pixmapData();
if (pmd->classId() == QPixmapData::OpenGLClass)
glpd = static_cast<QGLPixmapData*>(pmd)->glDevice();
#ifdef Q_WS_X11
else if (pmd->classId() == QPixmapData::X11Class)
glpd = static_cast<QX11GLPixmapData*>(pmd);
#endif
else
qWarning("Pixmap type not supported for GL rendering");
#else
qWarning("Pixmap render targets not supported on OpenGL ES 1.x");
#endif
break;
}
default:
qWarning("QGLPaintDevice::getDevice() - Unknown device type %d", pd->devType());
break;
}
return glpd;
}
QT_END_NAMESPACE
|
