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
|
/****************************************************************************
**
** Copyright (C) 2009 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 <qdebug.h>
#include "qglpixelbuffer.h"
#include "qglpixelbuffer_p.h"
#include "qgl_egl_p.h"
#include <qimage.h>
#include <private/qgl_p.h>
#ifdef QT_OPENGL_ES_1_CL
#include "qgl_cl_p.h"
#endif
QT_BEGIN_NAMESPACE
#ifdef EGL_BIND_TO_TEXTURE_RGBA
#define QGL_RENDER_TEXTURE 1
#else
#define QGL_RENDER_TEXTURE 0
#endif
bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
{
// Create the EGL context.
ctx = new QEglContext();
ctx->setApi(QEgl::OpenGL);
// Open the EGL display.
if (!ctx->openDisplay(0)) {
delete ctx;
ctx = 0;
return false;
}
// Find the shared context.
QEglContext *shareContext = 0;
if (shareWidget && shareWidget->d_func()->glcx)
shareContext = shareWidget->d_func()->glcx->d_func()->eglContext;
// Choose an appropriate configuration. We use the best format
// we can find, even if it is greater than the requested format.
// We try for a pbuffer that is capable of texture rendering if possible.
textureFormat = EGL_NONE;
if (shareContext) {
// Use the same configuration as the widget we are sharing with.
ctx->setConfig(shareContext->config());
#if QGL_RENDER_TEXTURE
EGLint value = EGL_FALSE;
if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGBA, &value) && value)
textureFormat = EGL_TEXTURE_RGBA;
else if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGB, &value) && value)
textureFormat = EGL_TEXTURE_RGB;
#endif
} else {
QEglProperties configProps;
qt_egl_set_format(configProps, QInternal::Pbuffer, f);
configProps.setRenderableType(ctx->api());
bool ok = false;
#if QGL_RENDER_TEXTURE
textureFormat = EGL_TEXTURE_RGBA;
configProps.setValue(EGL_BIND_TO_TEXTURE_RGBA, EGL_TRUE);
ok = ctx->chooseConfig(configProps, QEgl::BestPixelFormat);
if (!ok) {
// Try again with RGB texture rendering.
textureFormat = EGL_TEXTURE_RGB;
configProps.removeValue(EGL_BIND_TO_TEXTURE_RGBA);
configProps.setValue(EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE);
ok = ctx->chooseConfig(configProps, QEgl::BestPixelFormat);
if (!ok) {
// One last try for a pbuffer with no texture rendering.
configProps.removeValue(EGL_BIND_TO_TEXTURE_RGB);
textureFormat = EGL_NONE;
}
}
#endif
if (!ok) {
if (!ctx->chooseConfig(configProps, QEgl::BestPixelFormat)) {
delete ctx;
ctx = 0;
return false;
}
}
}
// Retrieve the actual format properties.
qt_egl_update_format(*ctx, format);
// Create the attributes needed for the pbuffer.
QEglProperties attribs;
attribs.setValue(EGL_WIDTH, size.width());
attribs.setValue(EGL_HEIGHT, size.height());
#if QGL_RENDER_TEXTURE
if (textureFormat != EGL_NONE) {
attribs.setValue(EGL_TEXTURE_FORMAT, textureFormat);
attribs.setValue(EGL_TEXTURE_TARGET, EGL_TEXTURE_2D);
}
#endif
// Create the pbuffer surface.
pbuf = eglCreatePbufferSurface(ctx->display(), ctx->config(), attribs.properties());
#if QGL_RENDER_TEXTURE
if (pbuf == EGL_NO_SURFACE && textureFormat != EGL_NONE) {
// Try again with texture rendering disabled.
textureFormat = EGL_NONE;
attribs.removeValue(EGL_TEXTURE_FORMAT);
attribs.removeValue(EGL_TEXTURE_TARGET);
pbuf = eglCreatePbufferSurface(ctx->display(), ctx->config(), attribs.properties());
}
#endif
if (pbuf == EGL_NO_SURFACE) {
qWarning() << "QGLPixelBufferPrivate::init(): Unable to create EGL pbuffer surface:" << QEglContext::errorString(eglGetError());
return false;
}
// Create a new context for the configuration.
if (!ctx->createContext(shareContext)) {
delete ctx;
ctx = 0;
return false;
}
return true;
}
bool QGLPixelBufferPrivate::cleanup()
{
// No need to destroy "pbuf" here - it is done in QGLContext::reset().
return true;
}
bool QGLPixelBuffer::bindToDynamicTexture(GLuint texture_id)
{
#if QGL_RENDER_TEXTURE
Q_D(QGLPixelBuffer);
if (d->invalid || d->textureFormat == EGL_NONE || !d->ctx)
return false;
glBindTexture(GL_TEXTURE_2D, texture_id);
return eglBindTexImage(d->ctx->display(), d->pbuf, EGL_BACK_BUFFER);
#else
Q_UNUSED(texture_id);
return false;
#endif
}
void QGLPixelBuffer::releaseFromDynamicTexture()
{
#if QGL_RENDER_TEXTURE
Q_D(QGLPixelBuffer);
if (d->invalid || d->textureFormat == EGL_NONE || !d->ctx)
return;
eglReleaseTexImage(d->ctx->display(), d->pbuf, EGL_BACK_BUFFER);
#endif
}
GLuint QGLPixelBuffer::generateDynamicTexture() const
{
#if QGL_RENDER_TEXTURE
Q_D(const QGLPixelBuffer);
GLuint texture;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
if (d->textureFormat == EGL_TEXTURE_RGB)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, d->req_size.width(), d->req_size.height(), 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
else
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, d->req_size.width(), d->req_size.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
return texture;
#else
return 0;
#endif
}
bool QGLPixelBuffer::hasOpenGLPbuffers()
{
// See if we have at least 1 configuration that matches the default format.
EGLDisplay dpy = QEglContext::defaultDisplay(0);
if (dpy == EGL_NO_DISPLAY)
return false;
QEglProperties configProps;
qt_egl_set_format(configProps, QInternal::Pbuffer, QGLFormat::defaultFormat());
configProps.setRenderableType(QEgl::OpenGL);
do {
EGLConfig cfg = 0;
EGLint matching = 0;
if (eglChooseConfig(dpy, configProps.properties(),
&cfg, 1, &matching) && matching > 0)
return true;
} while (configProps.reduceConfiguration());
return false;
}
QT_END_NAMESPACE
|
