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39
40#ifndef QOPENGLCONTEXT_P_H
41#define QOPENGLCONTEXT_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtGui/private/qtguiglobal_p.h>
55
56#ifndef QT_NO_OPENGL
57
58#include <qopengl.h>
59#include "qopenglcontext.h"
60#include <private/qobject_p.h>
61#include <qmutex.h>
62
63#include <QtCore/QByteArray>
64#include <QtCore/QHash>
65#include <QtCore/QSet>
66
67QT_BEGIN_NAMESPACE
68
69
70class QOpenGLFunctions;
71class QOpenGLContext;
72class QOpenGLFramebufferObject;
73class QOpenGLMultiGroupSharedResource;
74
75class Q_GUI_EXPORT QOpenGLSharedResource
76{
77public:
78 QOpenGLSharedResource(QOpenGLContextGroup *group);
79 virtual ~QOpenGLSharedResource() = 0;
80
81 QOpenGLContextGroup *group() const { return m_group; }
82
83 // schedule the resource for deletion at an appropriate time
84 void free();
85
86protected:
87 // the resource's share group no longer exists, invalidate the resource
88 virtual void invalidateResource() = 0;
89
90 // a valid context in the group is current, free the resource
91 virtual void freeResource(QOpenGLContext *context) = 0;
92
93private:
94 QOpenGLContextGroup *m_group;
95
96 friend class QOpenGLContextGroup;
97 friend class QOpenGLContextGroupPrivate;
98 friend class QOpenGLMultiGroupSharedResource;
99
100 Q_DISABLE_COPY_MOVE(QOpenGLSharedResource)
101};
102
103class Q_GUI_EXPORT QOpenGLSharedResourceGuard : public QOpenGLSharedResource
104{
105public:
106 typedef void (*FreeResourceFunc)(QOpenGLFunctions *functions, GLuint id);
107 QOpenGLSharedResourceGuard(QOpenGLContext *context, GLuint id, FreeResourceFunc func)
108 : QOpenGLSharedResource(context->shareGroup())
109 , m_id(id)
110 , m_func(func)
111 {
112 }
113
114 GLuint id() const { return m_id; }
115
116protected:
117 void invalidateResource() override
118 {
119 m_id = 0;
120 }
121
122 void freeResource(QOpenGLContext *context) override;
123
124private:
125 GLuint m_id;
126 FreeResourceFunc m_func;
127};
128
129class Q_GUI_EXPORT QOpenGLContextGroupPrivate : public QObjectPrivate
130{
131 Q_DECLARE_PUBLIC(QOpenGLContextGroup)
132public:
133 QOpenGLContextGroupPrivate()
134 : m_context(nullptr)
135 , m_refs(0)
136 {
137 }
138
139 void addContext(QOpenGLContext *ctx);
140 void removeContext(QOpenGLContext *ctx);
141
142 void cleanup();
143
144 void deletePendingResources(QOpenGLContext *ctx);
145
146 QOpenGLContext *m_context;
147
148 QList<QOpenGLContext *> m_shares;
149 QRecursiveMutex m_mutex;
150
151 QHash<QOpenGLMultiGroupSharedResource *, QOpenGLSharedResource *> m_resources;
152 QAtomicInt m_refs;
153
154 QList<QOpenGLSharedResource *> m_sharedResources;
155 QList<QOpenGLSharedResource *> m_pendingDeletion;
156};
157
158class Q_GUI_EXPORT QOpenGLMultiGroupSharedResource
159{
160public:
161 QOpenGLMultiGroupSharedResource();
162 ~QOpenGLMultiGroupSharedResource();
163
164 void insert(QOpenGLContext *context, QOpenGLSharedResource *value);
165 void cleanup(QOpenGLContextGroup *group, QOpenGLSharedResource *value);
166
167 QOpenGLSharedResource *value(QOpenGLContext *context);
168
169 QList<QOpenGLSharedResource *> resources() const;
170
171 template <typename T>
172 T *value(QOpenGLContext *context) {
173 QOpenGLContextGroup *group = context->shareGroup();
174 // Have to use our own mutex here, not the group's, since
175 // m_groups has to be protected too against any concurrent access.
176 QMutexLocker locker(&m_mutex);
177 T *resource = static_cast<T *>(group->d_func()->m_resources.value(key: this, defaultValue: 0));
178 if (!resource) {
179 resource = new T(context);
180 insert(context, value: resource);
181 }
182 return resource;
183 }
184
185private:
186 QAtomicInt active;
187 QList<QOpenGLContextGroup *> m_groups;
188 QRecursiveMutex m_mutex;
189};
190
191class QPaintEngineEx;
192class QOpenGLFunctions;
193class QOpenGLTextureHelper;
194
195class Q_GUI_EXPORT QOpenGLContextPrivate : public QObjectPrivate
196{
197 Q_DECLARE_PUBLIC(QOpenGLContext)
198public:
199 QOpenGLContextPrivate()
200 : qGLContextHandle(nullptr)
201 , qGLContextDeleteFunction(nullptr)
202 , platformGLContext(nullptr)
203 , shareContext(nullptr)
204 , shareGroup(nullptr)
205 , screen(nullptr)
206 , surface(nullptr)
207 , functions(nullptr)
208 , textureFunctions(nullptr)
209 , max_texture_size(-1)
210 , workaround_brokenFBOReadBack(false)
211 , workaround_brokenTexSubImage(false)
212 , workaround_missingPrecisionQualifiers(false)
213 , active_engine(nullptr)
214 , qgl_current_fbo_invalid(false)
215 , qgl_current_fbo(nullptr)
216 , defaultFboRedirect(0)
217 {
218 requestedFormat = QSurfaceFormat::defaultFormat();
219 }
220
221 ~QOpenGLContextPrivate()
222 {
223 //do not delete the QOpenGLContext handle here as it is deleted in
224 //QWidgetPrivate::deleteTLSysExtra()
225 }
226
227 mutable QHash<QOpenGLVersionProfile, QAbstractOpenGLFunctions *> versionFunctions;
228 mutable QOpenGLVersionFunctionsStorage versionFunctionsStorage;
229 mutable QSet<QAbstractOpenGLFunctions *> externalVersionFunctions;
230
231 void *qGLContextHandle;
232 void (*qGLContextDeleteFunction)(void *handle);
233
234 QSurfaceFormat requestedFormat;
235 QPlatformOpenGLContext *platformGLContext;
236 QOpenGLContext *shareContext;
237 QOpenGLContextGroup *shareGroup;
238 QScreen *screen;
239 QSurface *surface;
240 QOpenGLFunctions *functions;
241 mutable QSet<QByteArray> extensionNames;
242 QOpenGLTextureHelper* textureFunctions;
243
244 GLint max_texture_size;
245
246 bool workaround_brokenFBOReadBack;
247 bool workaround_brokenTexSubImage;
248 bool workaround_missingPrecisionQualifiers;
249
250 QPaintEngineEx *active_engine;
251
252 bool qgl_current_fbo_invalid;
253
254 // Set and unset in QOpenGLFramebufferObject::bind()/unbind().
255 // (Only meaningful for QOGLFBO since an FBO might be bound by other means)
256 // Saves us from querying the driver for the current FBO in most paths.
257 QOpenGLFramebufferObject *qgl_current_fbo;
258
259 QVariant nativeHandle;
260 GLuint defaultFboRedirect;
261
262 static QOpenGLContext *setCurrentContext(QOpenGLContext *context);
263
264 int maxTextureSize();
265
266 static QOpenGLContextPrivate *get(QOpenGLContext *context)
267 {
268 return context ? context->d_func() : nullptr;
269 }
270
271#if !defined(QT_NO_DEBUG)
272 static bool toggleMakeCurrentTracker(QOpenGLContext *context, bool value)
273 {
274 QMutexLocker locker(&makeCurrentTrackerMutex);
275 bool old = makeCurrentTracker.value(akey: context, adefaultValue: false);
276 makeCurrentTracker.insert(akey: context, avalue: value);
277 return old;
278 }
279 static void cleanMakeCurrentTracker(QOpenGLContext *context)
280 {
281 QMutexLocker locker(&makeCurrentTrackerMutex);
282 makeCurrentTracker.remove(akey: context);
283 }
284 static QHash<QOpenGLContext *, bool> makeCurrentTracker;
285 static QMutex makeCurrentTrackerMutex;
286#endif
287
288 void _q_screenDestroyed(QObject *object);
289};
290
291Q_GUI_EXPORT void qt_gl_set_global_share_context(QOpenGLContext *context);
292Q_GUI_EXPORT QOpenGLContext *qt_gl_global_share_context();
293
294QT_END_NAMESPACE
295
296#endif // QT_NO_OPENGL
297#endif // QOPENGLCONTEXT_P_H
298

source code of qtbase/src/gui/kernel/qopenglcontext_p.h