From 8c97cd7a91e99a2665e871efe1bf577e33eaff3a Mon Sep 17 00:00:00 2001 From: Kim Motoyoshi Kalland Date: Mon, 20 Jul 2009 12:41:47 +0200 Subject: Fixed GL2 engine shader manager to work with more than one context. I added a QGLContextResource class which can be used internally in Qt for sharing resources between contexts. The QGLContextResource is a hash map where the context is used as 'key', and the resource is the 'value'. All the sharing contexts point to the same resource, and the resource is automatically deleted when it is not referenced any more. Now, the shader manager uses the QGLContextResource class. I also added a pointer to a struct in the QGLContextPrivate class. The struct is shared between all the sharing contexts and is deleted automatically. Currently, the struct only contains the resolved OpenGL function pointers. The shared context register code has been simplified. Reviewed-by: Tom --- .../gl2paintengineex/qglengineshadermanager.cpp | 22 +++ .../gl2paintengineex/qglengineshadermanager_p.h | 3 + .../gl2paintengineex/qpaintengineex_opengl2.cpp | 11 +- src/opengl/qgl.cpp | 159 ++++++++++++++++++++- src/opengl/qgl.h | 1 + src/opengl/qgl_p.h | 95 ++++++------ 6 files changed, 228 insertions(+), 63 deletions(-) diff --git a/src/opengl/gl2paintengineex/qglengineshadermanager.cpp b/src/opengl/gl2paintengineex/qglengineshadermanager.cpp index 27636f4..d7c91b8 100644 --- a/src/opengl/gl2paintengineex/qglengineshadermanager.cpp +++ b/src/opengl/gl2paintengineex/qglengineshadermanager.cpp @@ -49,6 +49,28 @@ QT_BEGIN_NAMESPACE +static void QGLEngineShaderManager_free(void *ptr) +{ + delete reinterpret_cast(ptr); +} + +Q_GLOBAL_STATIC_WITH_ARGS(QGLContextResource, qt_shader_managers, (QGLEngineShaderManager_free)) + +QGLEngineShaderManager *QGLEngineShaderManager::managerForContext(const QGLContext *context) +{ + QGLEngineShaderManager *p = reinterpret_cast(qt_shader_managers()->value(context)); + if (!p) { + QGLContext *oldContext = const_cast(QGLContext::currentContext()); + if (oldContext != context) + const_cast(context)->makeCurrent(); + p = new QGLEngineShaderManager(const_cast(context)); + qt_shader_managers()->insert(context, p); + if (oldContext && oldContext != context) + oldContext->makeCurrent(); + } + return p; +} + const char* QGLEngineShaderManager::qglEngineShaderSourceCode[] = { 0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0, diff --git a/src/opengl/gl2paintengineex/qglengineshadermanager_p.h b/src/opengl/gl2paintengineex/qglengineshadermanager_p.h index 442edfe..99711bd40 100644 --- a/src/opengl/gl2paintengineex/qglengineshadermanager_p.h +++ b/src/opengl/gl2paintengineex/qglengineshadermanager_p.h @@ -220,6 +220,7 @@ #include #include #include +#include QT_BEGIN_HEADER @@ -314,6 +315,8 @@ public: QGLShaderProgram* simpleProgram(); // Used to draw into e.g. stencil buffers QGLShaderProgram* blitProgram(); // Used to blit a texture into the framebuffer + static QGLEngineShaderManager *managerForContext(const QGLContext *context); + enum ShaderName { MainVertexShader, MainWithTexCoordsVertexShader, diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp index 2bfbf4a..9b0321d 100644 --- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp +++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp @@ -266,10 +266,6 @@ extern QImage qt_imageForBrush(int brushStyle, bool invert); QGL2PaintEngineExPrivate::~QGL2PaintEngineExPrivate() { - if (shaderManager) { - delete shaderManager; - shaderManager = 0; - } } void QGL2PaintEngineExPrivate::updateTextureFilter(GLenum target, GLenum wrapMode, bool smoothPixmapTransform, GLuint id) @@ -1209,11 +1205,8 @@ bool QGL2PaintEngineEx::begin(QPaintDevice *pdev) qt_resolve_version_2_0_functions(d->ctx); #endif - if (d->shaderManager) { - d->shaderManager->setDirty(); - } else { - d->shaderManager = new QGLEngineShaderManager(d->ctx); - } + d->shaderManager = QGLEngineShaderManager::managerForContext(d->ctx); + d->shaderManager->setDirty(); glViewport(0, 0, d->width, d->height); diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp index 0169ea2..f51b271 100644 --- a/src/opengl/qgl.cpp +++ b/src/opengl/qgl.cpp @@ -3363,8 +3363,13 @@ bool QGLWidget::event(QEvent *e) #elif defined(Q_WS_WIN) if (e->type() == QEvent::ParentChange) { QGLContext *newContext = new QGLContext(d->glcx->requestedFormat(), this); - qgl_share_reg()->replaceShare(d->glcx, newContext); + QList shares = qgl_share_reg()->shares(d->glcx); setContext(newContext); + for (int i = 0; i < shares.size(); ++i) { + if (newContext != shares.at(i)) + qgl_share_reg()->addShare(newContext, shares.at(i)); + } + // the overlay needs to be recreated as well delete d->olcx; if (isValid() && context()->format().hasOverlay()) { @@ -4612,4 +4617,156 @@ bool QGLDrawable::autoFillBackground() const return false; } + +bool QGLShareRegister::checkSharing(const QGLContext *context1, const QGLContext *context2) { + bool sharing = (context1 && context2 && context1->d_ptr->groupResources == context2->d_ptr->groupResources); + return sharing; +} + +void QGLShareRegister::addShare(const QGLContext *context, const QGLContext *share) { + Q_ASSERT(context && share); + if (context->d_ptr->groupResources == share->d_ptr->groupResources) + return; + + // Make sure 'context' is not already shared with another group of contexts. + Q_ASSERT(reg.find(context->d_ptr->groupResources) == reg.end()); + Q_ASSERT(context->d_ptr->groupResources->refs == 1); + + // Free 'context' group resources and make it use the same resources as 'share'. + delete context->d_ptr->groupResources; + context->d_ptr->groupResources = share->d_ptr->groupResources; + context->d_ptr->groupResources->refs.ref(); + + // Maintain a list of all the contexts in each group of sharing contexts. + SharingHash::iterator it = reg.find(share->d_ptr->groupResources); + if (it == reg.end()) + it = reg.insert(share->d_ptr->groupResources, ContextList() << share); + it.value() << context; +} + +QList QGLShareRegister::shares(const QGLContext *context) { + SharingHash::const_iterator it = reg.find(context->d_ptr->groupResources); + if (it == reg.end()) + return ContextList(); + return it.value(); +} + +void QGLShareRegister::removeShare(const QGLContext *context) { + SharingHash::iterator it = reg.find(context->d_ptr->groupResources); + if (it == reg.end()) + return; + + int count = it.value().removeAll(context); + Q_ASSERT(count == 1); + + Q_ASSERT(it.value().size() != 0); + if (it.value().size() == 1) + reg.erase(it); +} + +QGLContextResource::QGLContextResource(FreeFunc f, QObject *parent) + : QObject(parent), free(f) +{ + connect(QGLSignalProxy::instance(), SIGNAL(aboutToDestroyContext(const QGLContext *)), this, SLOT(aboutToDestroyContext(const QGLContext *))); +} + +QGLContextResource::~QGLContextResource() +{ + while (!m_resources.empty()) + remove(m_resources.begin().key()); +} + +void QGLContextResource::insert(const QGLContext *key, void *value) +{ + QList shares = qgl_share_reg()->shares(key); + if (shares.size() == 0) + shares.append(key); + void *oldValue = 0; + for (int i = 0; i < shares.size(); ++i) { + ResourceHash::iterator it = m_resources.find(shares.at(i)); + if (it != m_resources.end()) { + Q_ASSERT(oldValue == 0 || oldValue == it.value()); + oldValue = it.value(); + it.value() = value; + } else { + m_resources.insert(shares.at(i), value); + } + } + if (oldValue != 0 && oldValue != value) { + QGLContext *oldContext = const_cast(QGLContext::currentContext()); + if (oldContext != key) + const_cast(key)->makeCurrent(); + free(oldValue); + if (oldContext && oldContext != key) + oldContext->makeCurrent(); + } +} + +void *QGLContextResource::value(const QGLContext *key) +{ + ResourceHash::const_iterator it = m_resources.find(key); + // Check if there is a value associated with 'key'. + if (it != m_resources.end()) + return it.value(); + // Check if there is a value associated with sharing contexts. + QList shares = qgl_share_reg()->shares(key); + for (int i = 0; i < shares.size() && it == m_resources.end(); ++i) + it = m_resources.find(shares.at(i)); + if (it == m_resources.end()) + return 0; // Didn't find anything. + + // Found something! Share this info with all the buddies. + for (int i = 0; i < shares.size(); ++i) + m_resources.insert(shares.at(i), it.value()); + return it.value(); +} + +void QGLContextResource::remove(const QGLContext *key) +{ + QList shares = qgl_share_reg()->shares(key); + if (shares.size() == 0) + shares.append(key); + void *oldValue = 0; + for (int i = 0; i < shares.size(); ++i) { + ResourceHash::iterator it = m_resources.find(shares.at(i)); + if (it != m_resources.end()) { + Q_ASSERT(oldValue == 0 || oldValue == it.value()); + oldValue = it.value(); + m_resources.erase(it); + } + } + if (oldValue != 0) { + QGLContext *oldContext = const_cast(QGLContext::currentContext()); + if (oldContext != key) + const_cast(key)->makeCurrent(); + free(oldValue); + if (oldContext && oldContext != key) + oldContext->makeCurrent(); + } +} + +void QGLContextResource::aboutToDestroyContext(const QGLContext *key) +{ + ResourceHash::iterator it = m_resources.find(key); + if (it == m_resources.end()) + return; + + QList shares = qgl_share_reg()->shares(key); + if (shares.size() > 1) { + Q_ASSERT(key->isSharing()); + // At least one of the shared contexts must stay in the cache. + // Otherwise, the value pointer is lost. + for (int i = 0; i < 2/*shares.size()*/; ++i) + m_resources.insert(shares.at(i), it.value()); + } else { + QGLContext *oldContext = const_cast(QGLContext::currentContext()); + if (oldContext != key) + const_cast(key)->makeCurrent(); + free(it.value()); + if (oldContext && oldContext != key) + oldContext->makeCurrent(); + } + m_resources.erase(it); +} + QT_END_NAMESPACE diff --git a/src/opengl/qgl.h b/src/opengl/qgl.h index 86555da..31b9543 100644 --- a/src/opengl/qgl.h +++ b/src/opengl/qgl.h @@ -364,6 +364,7 @@ private: friend class QGLPixmapData; friend class QGLPixmapFilterBase; friend class QGLTextureGlyphCache; + friend class QGLShareRegister; friend QGLFormat::OpenGLVersionFlags QGLFormat::openGLVersionFlags(); #ifdef Q_WS_MAC public: diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h index ac19d64..fda0257 100644 --- a/src/opengl/qgl_p.h +++ b/src/opengl/qgl_p.h @@ -196,12 +196,19 @@ public: #endif }; +struct QGLContextGroupResources +{ + QGLContextGroupResources() : refs(1) { } + QGLExtensionFuncs extensionFuncs; + QAtomicInt refs; +}; + class QGLContextPrivate { Q_DECLARE_PUBLIC(QGLContext) public: - explicit QGLContextPrivate(QGLContext *context) : internal_context(false), q_ptr(context) {} - ~QGLContextPrivate() {} + explicit QGLContextPrivate(QGLContext *context) : internal_context(false), q_ptr(context) {groupResources = new QGLContextGroupResources;} + ~QGLContextPrivate() {if (!groupResources->refs.deref()) delete groupResources;} GLuint bindTexture(const QImage &image, GLenum target, GLint format, const qint64 key, bool clean = false); GLuint bindTexture(const QPixmap &pixmap, GLenum target, GLint format, bool clean); @@ -257,14 +264,14 @@ public: QGLContext *q_ptr; QGLFormat::OpenGLVersionFlags version_flags; - QGLExtensionFuncs extensionFuncs; + QGLContextGroupResources *groupResources; GLint max_texture_size; GLuint current_fbo; QPaintEngine *active_engine; #ifdef Q_WS_WIN - static inline QGLExtensionFuncs& qt_get_extension_funcs(const QGLContext *ctx) { return ctx->d_ptr->extensionFuncs; } + static inline QGLExtensionFuncs& qt_get_extension_funcs(const QGLContext *ctx) { return ctx->d_ptr->groupResources->extensionFuncs; } #endif #if defined(Q_WS_X11) || defined(Q_WS_MAC) || defined(Q_WS_QWS) @@ -371,62 +378,21 @@ struct QGLThreadContext { }; extern QThreadStorage qgl_context_storage; -typedef QMultiHash QGLSharingHash; class QGLShareRegister { public: QGLShareRegister() {} ~QGLShareRegister() { reg.clear(); } - bool checkSharing(const QGLContext *context1, const QGLContext *context2, const QGLContext * skip=0) { - if (context1 == context2) - return true; - QList shares = reg.values(context1); - for (int k=0; k shares(const QGLContext *context) { - return reg.values(context); - } - + bool checkSharing(const QGLContext *context1, const QGLContext *context2); + void addShare(const QGLContext *context, const QGLContext *share); + QList shares(const QGLContext *context); + void removeShare(const QGLContext *context); private: - QGLSharingHash reg; + // Use a context's 'groupResources' pointer to uniquely identify a group. + typedef QList ContextList; + typedef QHash SharingHash; + SharingHash reg; }; extern Q_OPENGL_EXPORT QGLShareRegister* qgl_share_reg(); @@ -464,6 +430,29 @@ inline GLenum qt_gl_preferredTextureTarget() #endif } +// One resource per group of shared contexts. +class QGLContextResource : public QObject +{ + Q_OBJECT +public: + typedef void (*FreeFunc)(void *); + QGLContextResource(FreeFunc f, QObject *parent = 0); + ~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); + // Free resource for 'key' and all its shared contexts. + void remove(const QGLContext *key); +private slots: + // Remove entry 'key' from cache and delete resource if there are no shared contexts. + void aboutToDestroyContext(const QGLContext *key); +private: + typedef QHash ResourceHash; + ResourceHash m_resources; + FreeFunc free; +}; + QT_END_NAMESPACE #endif // QGL_P_H -- cgit v0.12