diff options
Diffstat (limited to 'src/gui/kernel/qopenglcontext.cpp')
| -rw-r--r-- | src/gui/kernel/qopenglcontext.cpp | 142 |
1 files changed, 120 insertions, 22 deletions
diff --git a/src/gui/kernel/qopenglcontext.cpp b/src/gui/kernel/qopenglcontext.cpp index 7257663799..fb7d15c160 100644 --- a/src/gui/kernel/qopenglcontext.cpp +++ b/src/gui/kernel/qopenglcontext.cpp @@ -52,6 +52,7 @@ #include <QtGui/private/qopengl_p.h> #include <QtGui/private/qwindow_p.h> #include <QtGui/QScreen> +#include <qpa/qplatformnativeinterface.h> #include <private/qopenglextensions_p.h> #include <private/qopenglversionfunctionsfactory_p.h> @@ -162,7 +163,7 @@ void QOpenGLVersionProfile::setVersion(int majorVersion, int minorVersion) } /*! - Returns the OpenGL profile. Only make sense if profiles are supported by this version. + Returns the OpenGL profile. Only makes sense if profiles are supported by this version. \sa setProfile(), supportsProfiles() */ @@ -172,7 +173,8 @@ QSurfaceFormat::OpenGLContextProfile QOpenGLVersionProfile::profile() const } /*! - Sets the profile. Only make sense if profiles are supported by this version. + Sets the OpenGL profile \a profile. Only makes sense if profiles are supported by + this version. \sa profile(), supportsProfiles() */ @@ -204,7 +206,7 @@ bool QOpenGLVersionProfile::isLegacyVersion() const /*! Returns \c true if the version number is valid. Note that for a default constructed - QOpenGLVersionProfile object this function will return false. + QOpenGLVersionProfile object this function will return \c false. \sa setVersion(), version() */ @@ -256,12 +258,10 @@ QMutex QOpenGLContextPrivate::makeCurrentTrackerMutex; rendering a new frame, after calling swapBuffers(). If the context is temporarily not needed, such as when the application is - not rendering, it can be useful to call destroy() to free resources. - However, if you do so you will need to call create() again before the - context can be used, and you might need to recreate any OpenGL resources - and reinitialize the OpenGL state. You can connect to the - aboutToBeDestroyed() signal to clean up any resources that have been - allocated with different ownership from the QOpenGLContext itself. + not rendering, it can be useful to delete it in order to free resources. + You can connect to the aboutToBeDestroyed() signal to clean up any + resources that have been allocated with different ownership from the + QOpenGLContext itself. Once a QOpenGLContext has been made current, you can render to it in a platform independent way by using Qt's OpenGL enablers such as @@ -335,16 +335,18 @@ int QOpenGLContextPrivate::maxTextureSize() if (max_texture_size != -1) return max_texture_size; - glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size); + Q_Q(QOpenGLContext); + QOpenGLFunctions *funcs = q->functions(); + funcs->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size); #ifndef QT_OPENGL_ES - if (!QOpenGLFunctions::isES()) { + if (!q->isES()) { GLenum proxy = GL_PROXY_TEXTURE_2D; GLint size; GLint next = 64; - glTexImage2D(proxy, 0, GL_RGBA, next, next, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); - glGetTexLevelParameteriv(proxy, 0, GL_TEXTURE_WIDTH, &size); + funcs->glTexImage2D(proxy, 0, GL_RGBA, next, next, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); + funcs->glGetTexLevelParameteriv(proxy, 0, GL_TEXTURE_WIDTH, &size); if (size == 0) { return max_texture_size; } @@ -354,8 +356,8 @@ int QOpenGLContextPrivate::maxTextureSize() if (next > max_texture_size) break; - glTexImage2D(proxy, 0, GL_RGBA, next, next, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); - glGetTexLevelParameteriv(proxy, 0, GL_TEXTURE_WIDTH, &next); + funcs->glTexImage2D(proxy, 0, GL_RGBA, next, next, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); + funcs->glGetTexLevelParameteriv(proxy, 0, GL_TEXTURE_WIDTH, &next); } while (next > size); max_texture_size = size; @@ -633,9 +635,9 @@ QOpenGLFunctions *QOpenGLContext::functions() const */ /*! - Returns a pointer to an object that provides access to all functions for - the version of the current context. Before using any of the functions - they must be initialized by calling QAbstractOpenGLFunctions::initializeOpenGLFunctions(). + Returns a pointer to an object that provides access to all functions for the + \a versionProfile of the current context. Before using any of the functions they must + be initialized by calling QAbstractOpenGLFunctions::initializeOpenGLFunctions(). Usually one would use the template version of this function to automatically have the result cast to the correct type. @@ -643,8 +645,8 @@ QOpenGLFunctions *QOpenGLContext::functions() const QAbstractOpenGLFunctions *QOpenGLContext::versionFunctions(const QOpenGLVersionProfile &versionProfile) const { #ifndef QT_OPENGL_ES_2 - if (QOpenGLFunctions::isES()) { - qWarning("versionFunctions: Not supported on dynamic GL ES"); + if (isES()) { + qWarning("versionFunctions: Not supported on OpenGL ES"); return 0; } #endif // QT_OPENGL_ES_2 @@ -703,7 +705,7 @@ QSet<QByteArray> QOpenGLContext::extensions() const /*! Returns \c true if this OpenGL context supports the specified OpenGL - \a extension, false otherwise. + \a extension, \c false otherwise. The context or a sharing context must be current. @@ -864,7 +866,7 @@ void QOpenGLContext::swapBuffers(QSurface *surface) qWarning() << "QOpenGLContext::swapBuffers() called without corresponding makeCurrent()"; #endif if (surface->format().swapBehavior() == QSurfaceFormat::SingleBuffer) - glFlush(); + functions()->glFlush(); d->platformGLContext->swapBuffers(surfaceHandle); } @@ -885,6 +887,20 @@ QFunctionPointer QOpenGLContext::getProcAddress(const QByteArray &procName) cons Returns the format of the underlying platform context, if create() has been called. Otherwise, returns the requested format. + + The requested and the actual format may differ. Requesting a given OpenGL version does + not mean the resulting context will target exactly the requested version. It is only + guaranteed that the version/profile/options combination for the created context is + compatible with the request, as long as the driver is able to provide such a context. + + For example, requesting an OpenGL version 3.x core profile context may result in an + OpenGL 4.x core profile context. Similarly, a request for OpenGL 2.1 may result in an + OpenGL 3.0 context with deprecated functions enabled. Finally, depending on the + driver, unsupported versions may result in either a context creation failure or in a + context for the highest supported version. + + Similar differences are possible in the buffer sizes, for example, the resulting + context may have a larger depth buffer than requested. This is perfectly normal. */ QSurfaceFormat QOpenGLContext::format() const { @@ -960,6 +976,88 @@ void QOpenGLContext::deleteQGLContext() } /*! + Returns the platform-specific handle for the OpenGL implementation that + is currently in use. (for example, a HMODULE on Windows) + + On platforms that do not use dynamic GL switch the return value is null. + + The library might be GL-only, meaning that windowing system interface + functions (for example EGL) may live in another, separate library. + + \note This function requires that the QGuiApplication instance is already created. + + \sa openGLModuleType() + + \since 5.3 + */ +void *QOpenGLContext::openGLModuleHandle() +{ +#ifdef QT_OPENGL_DYNAMIC + QGuiApplication *app = qGuiApp; + Q_ASSERT(app); + return app->platformNativeInterface()->nativeResourceForIntegration(QByteArrayLiteral("glhandle")); +#else + return 0; +#endif +} + +/*! + \enum QOpenGLContext::OpenGLModuleType + This enum defines the type of the underlying OpenGL implementation. + + \value DesktopGL Desktop OpenGL + \value GLES2 OpenGL ES 2.0 or higher + \value GLES1 OpenGL ES 1.x + + \since 5.3 +*/ + +/*! + Returns the underlying OpenGL implementation type. + + On platforms where the OpenGL implementation is not dynamically + loaded, the return value is determined during compile time and never + changes. + + \note A desktop OpenGL implementation may be capable of creating + ES-compatible contexts too. Therefore in most cases it is more + appropriate to check QSurfaceFormat::renderableType() or using the + the convenience function isES(). + + \note This function requires that the QGuiApplication instance is already created. + + \since 5.3 + */ +QOpenGLContext::OpenGLModuleType QOpenGLContext::openGLModuleType() +{ +#if defined(QT_OPENGL_DYNAMIC) + Q_ASSERT(qGuiApp); + return QGuiApplicationPrivate::instance()->platformIntegration()->openGLModuleType(); +#elif defined(QT_OPENGL_ES_2) + return GLES2; +#elif defined(QT_OPENGL_ES) + return GLES1; +#else + return DesktopGL; +#endif +} + +/*! + Returns true if the context is an OpenGL ES context. + + If the context has not yet been created, the result is based on the + requested format set via setFormat(). + + \sa create(), format(), setFormat() + + \since 5.3 + */ +bool QOpenGLContext::isES() const +{ + return format().renderableType() == QSurfaceFormat::OpenGLES; +} + +/*! \internal */ QOpenGLVersionFunctionsBackend *QOpenGLContext::functionsBackend(const QOpenGLVersionStatus &v) const |