diff options
Diffstat (limited to 'src/opengl/qgl_p.h')
-rw-r--r-- | src/opengl/qgl_p.h | 137 |
1 files changed, 123 insertions, 14 deletions
diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h index acd799a..3be30de 100644 --- a/src/opengl/qgl_p.h +++ b/src/opengl/qgl_p.h @@ -206,7 +206,7 @@ public: #endif }; -class QGLContextResource; +class QGLContextGroupResourceBase; class QGLSharedResourceGuard; // QGLContextPrivate has the responsibility of creating context groups. @@ -234,7 +234,7 @@ private: QGLExtensionFuncs m_extensionFuncs; const QGLContext *m_context; // context group's representative QList<const QGLContext *> m_shares; - QHash<QGLContextResource *, void *> m_resources; + QHash<QGLContextGroupResourceBase *, void *> m_resources; QGLSharedResourceGuard *m_guards; // double-linked list of active guards. QAtomicInt m_refs; @@ -242,7 +242,7 @@ private: friend class QGLContext; friend class QGLContextPrivate; - friend class QGLContextResource; + friend class QGLContextGroupResourceBase; }; // Get the context that resources for "ctx" will transfer to once @@ -307,6 +307,8 @@ class QGLTexture; // all the GL2 engine uses: #define QT_GL_VERTEX_ARRAY_TRACKED_COUNT 3 +class QGLContextResourceBase; + class QGLContextPrivate { Q_DECLARE_PUBLIC(QGLContext) @@ -398,6 +400,7 @@ public: GLuint current_fbo; GLuint default_fbo; QPaintEngine *active_engine; + QHash<QGLContextResourceBase *, void *> m_resources; bool vertexAttributeArraysEnabledState[QT_GL_VERTEX_ARRAY_TRACKED_COUNT]; @@ -606,24 +609,130 @@ inline GLenum qt_gl_preferredTextureTarget() #endif } -// One resource per group of shared contexts. -class Q_OPENGL_EXPORT QGLContextResource +/* + Base for resources that are shared in a context group. +*/ +class QGLContextGroupResourceBase { public: - QGLContextResource(); - virtual ~QGLContextResource(); - // Set resource 'value' for 'key' and all its shared contexts. - void insert(const QGLContext *key, void *value); - // Return resource for 'key' or a shared context. - void *value(const QGLContext *key); - // Cleanup 'value' in response to a context group being destroyed. - void cleanup(const QGLContext *ctx, void *value); + QGLContextGroupResourceBase(); + virtual ~QGLContextGroupResourceBase(); + void insert(const QGLContext *context, void *value); + void *value(const QGLContext *context); + void cleanup(const QGLContext *context, void *value); virtual void freeResource(void *value) = 0; -private: + +protected: QList<QGLContextGroup *> m_groups; + +private: QAtomicInt active; }; +/* + The QGLContextGroupResource template is used to manage a resource + for a group of sharing GL contexts. When the last context in the + group is destroyed, or when the QGLContextGroupResource object + itself is destroyed (implies potential context switches), the + resource will be freed. + + The class used as the template class type needs to have a + constructor with the following signature: + T(const QGLContext *); +*/ +template <class T> +class QGLContextGroupResource : public QGLContextGroupResourceBase +{ +public: + ~QGLContextGroupResource() { + for (int i = 0; i < m_groups.size(); ++i) { + const QGLContext *context = m_groups.at(i)->context(); + T *resource = reinterpret_cast<T *>(QGLContextGroupResourceBase::value(context)); + if (resource) { + QGLShareContextScope scope(context); + delete resource; + } + } + } + + T *value(const QGLContext *context) { + T *resource = reinterpret_cast<T *>(QGLContextGroupResourceBase::value(context)); + if (!resource) { + resource = new T(context); + insert(context, resource); + } + return resource; + } + +protected: + void freeResource(void *resource) { + delete reinterpret_cast<T *>(resource); + } +}; + +/* + Base for resources that are context specific. +*/ +class QGLContextResourceBase +{ +public: + virtual ~QGLContextResourceBase() { + for (int i = 0; i < m_contexts.size(); ++i) + m_contexts.at(i)->d_ptr->m_resources.remove(this); + } + + void insert(const QGLContext *context, void *value) { + context->d_ptr->m_resources.insert(this, value); + } + + void *value(const QGLContext *context) { + return context->d_ptr->m_resources.value(this, 0); + } + virtual void freeResource(void *value) = 0; + +protected: + QList<const QGLContext *> m_contexts; +}; + +/* + The QGLContextResource template is used to manage a resource for a + single GL context. Just before the context is destroyed (while it's + still the current context), or when the QGLContextResource object + itself is destroyed (implies potential context switches), the + resource will be freed. The class used as the template class type + needs to have a constructor with the following signature: T(const + QGLContext *); +*/ +template <class T> +class QGLContextResource : public QGLContextResourceBase +{ +public: + ~QGLContextResource() { + for (int i = 0; i < m_contexts.size(); ++i) { + const QGLContext *context = m_contexts.at(i); + T *resource = reinterpret_cast<T *>(QGLContextResourceBase::value(context)); + if (resource) { + QGLShareContextScope scope(context); + delete resource; + } + } + } + + T *value(const QGLContext *context) { + T *resource = reinterpret_cast<T *>(QGLContextResourceBase::value(context)); + if (!resource) { + resource = new T(context); + insert(context, resource); + } + return resource; + } + +protected: + void freeResource(void *resource) { + delete reinterpret_cast<T *>(resource); + } +}; + // Put a guard around a GL object identifier and its context. // When the context goes away, a shared context will be used // in its place. If there are no more shared contexts, then |