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qplatformopenglcontext.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Contact: https://www.qt.io/licensing/-
5**-
6** This file is part of the QtGui module of the Qt Toolkit.-
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22** ensure the GNU Lesser General Public License version 3 requirements-
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38****************************************************************************/-
39-
40#include "qplatformopenglcontext.h"-
41-
42#include <QOpenGLFunctions>-
43-
44QT_BEGIN_NAMESPACE-
45-
46/*!-
47 \class QPlatformOpenGLContext-
48 \since 4.8-
49 \internal-
50 \preliminary-
51 \ingroup qpa-
52-
53 \brief The QPlatformOpenGLContext class provides an abstraction for native GL contexts.-
54-
55 In QPA the way to support OpenGL or OpenVG or other technologies that requires a native GL-
56 context is through the QPlatformOpenGLContext wrapper.-
57-
58 There is no factory function for QPlatformOpenGLContexts, but rather only one accessor function.-
59 The only place to retrieve a QPlatformOpenGLContext from is through a QPlatformWindow.-
60-
61 The context which is current for a specific thread can be collected by the currentContext()-
62 function. This is how QPlatformOpenGLContext also makes it possible to use the Qt GUI module-
63 withhout using QOpenGLWidget. When using QOpenGLContext::currentContext(), it will ask-
64 QPlatformOpenGLContext for the currentContext. Then a corresponding QOpenGLContext will be returned,-
65 which maps to the QPlatformOpenGLContext.-
66*/-
67-
68/*! \fn void QPlatformOpenGLContext::swapBuffers(QPlatformSurface *surface)-
69 Reimplement in subclass to native swap buffers calls-
70-
71 The implementation must support being called in a thread different than the gui-thread.-
72*/-
73-
74/*! \fn QFunctionPointer QPlatformOpenGLContext::getProcAddress(const char *procName)-
75-
76 Reimplement in subclass to allow dynamic querying of OpenGL symbols. As opposed to e.g. the wglGetProcAddress-
77 function on Windows, Qt expects this methods to be able to return valid function pointers even for standard-
78 OpenGL symbols.-
79*/-
80-
81class QPlatformOpenGLContextPrivate-
82{-
83public:-
84 QPlatformOpenGLContextPrivate() : context(0) {}
never executed: end of block
0
85-
86 QOpenGLContext *context;-
87};-
88-
89QPlatformOpenGLContext::QPlatformOpenGLContext()-
90 : d_ptr(new QPlatformOpenGLContextPrivate)-
91{-
92}
never executed: end of block
0
93-
94QPlatformOpenGLContext::~QPlatformOpenGLContext()-
95{-
96}-
97-
98/*!-
99 Called after a new instance is constructed. The default implementation does nothing.-
100-
101 Subclasses can use this function to perform additional initialization that relies on-
102 virtual functions.-
103 */-
104void QPlatformOpenGLContext::initialize()-
105{-
106}-
107-
108/*!-
109 Reimplement in subclass if your platform uses framebuffer objects for surfaces.-
110-
111 The default implementation returns 0.-
112*/-
113GLuint QPlatformOpenGLContext::defaultFramebufferObject(QPlatformSurface *) const-
114{-
115 return 0;
never executed: return 0;
0
116}-
117-
118QOpenGLContext *QPlatformOpenGLContext::context() const-
119{-
120 Q_D(const QPlatformOpenGLContext);-
121 return d->context;
never executed: return d->context;
0
122}-
123-
124void QPlatformOpenGLContext::setContext(QOpenGLContext *context)-
125{-
126 Q_D(QPlatformOpenGLContext);-
127 d->context = context;-
128}
never executed: end of block
0
129-
130bool QPlatformOpenGLContext::parseOpenGLVersion(const QByteArray &versionString, int &major, int &minor)-
131{-
132 bool majorOk = false;-
133 bool minorOk = false;-
134 QList<QByteArray> parts = versionString.split(' ');-
135 if (versionString.startsWith(QByteArrayLiteral("OpenGL ES"))) {
never executed: return ba;
versionString....turn ba; }()))Description
TRUEnever evaluated
FALSEnever evaluated
0
136 if (parts.size() >= 3) {
parts.size() >= 3Description
TRUEnever evaluated
FALSEnever evaluated
0
137 QList<QByteArray> versionParts = parts.at(2).split('.');-
138 if (versionParts.size() >= 2) {
versionParts.size() >= 2Description
TRUEnever evaluated
FALSEnever evaluated
0
139 major = versionParts.at(0).toInt(&majorOk);-
140 minor = versionParts.at(1).toInt(&minorOk);-
141 // Nexus 6 has "OpenGL ES 3.0V@95.0 (GIT@I86da836d38)"-
142 if (!minorOk)
!minorOkDescription
TRUEnever evaluated
FALSEnever evaluated
0
143 if (int idx = versionParts.at(1).indexOf('V'))
int idx = vers...).indexOf('V')Description
TRUEnever evaluated
FALSEnever evaluated
0
144 minor = versionParts.at(1).left(idx).toInt(&minorOk);
never executed: minor = versionParts.at(1).left(idx).toInt(&minorOk);
0
145 } else {
never executed: end of block
0
146 qWarning("Unrecognized OpenGL ES version");-
147 }
never executed: end of block
0
148 } else {-
149 // If < 3 parts to the name, it is an unrecognised OpenGL ES-
150 qWarning("Unrecognised OpenGL ES version");-
151 }
never executed: end of block
0
152 } else {-
153 // Not OpenGL ES, but regular OpenGL, the version numbers are first in the string-
154 QList<QByteArray> versionParts = parts.at(0).split('.');-
155 if (versionParts.size() >= 2) {
versionParts.size() >= 2Description
TRUEnever evaluated
FALSEnever evaluated
0
156 major = versionParts.at(0).toInt(&majorOk);-
157 minor = versionParts.at(1).toInt(&minorOk);-
158 } else {
never executed: end of block
0
159 qWarning("Unrecognized OpenGL version");-
160 }
never executed: end of block
0
161 }-
162-
163 if (!majorOk || !minorOk)
!majorOkDescription
TRUEnever evaluated
FALSEnever evaluated
!minorOkDescription
TRUEnever evaluated
FALSEnever evaluated
0
164 qWarning("Unrecognized OpenGL version");
never executed: QMessageLogger(__FILE__, 164, __PRETTY_FUNCTION__).warning("Unrecognized OpenGL version");
0
165 return (majorOk && minorOk);
never executed: return (majorOk && minorOk);
0
166}-
167-
168QT_END_NAMESPACE-
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