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#include "qsgcontext.h"
#include "renderer.h"
#include "node.h"
#include "qmlrenderer.h"
#include "default/default_rectanglenode.h"
#include "default/default_texturenode.h"
#include "default/default_glyphnode.h"
#include "threadedtexturemanager.h"
#include <QApplication>
#ifdef Q_WS_MAC
#include "mactexturemanager.h"
#endif
#ifdef Q_WS_QPA
#include "qsgeglfsthreadedtexturemanager.h"
#endif
#include <private/qobject_p.h>
class QSGContextPrivate : public QObjectPrivate
{
public:
QSGContextPrivate()
: rootNode(0)
, renderer(0)
, gl(0)
{
}
RootNode *rootNode;
Renderer *renderer;
TextureManager *textureManager;
QGLContext *gl;
};
/*!
\brief The QSGContext holds the scene graph entry points for one QML engine.
The context is not ready for use until it has a QGLContext. Once that happens,
the scene graph population can start.
*/
QSGContext::QSGContext(QObject *parent) :
QObject(*(new QSGContextPrivate), parent)
{
}
/*!
Returns the renderer. The renderer instance is created through the adaptation layer.
*/
Renderer *QSGContext::renderer() const
{
Q_D(const QSGContext);
return d->renderer;
}
/*!
Returns the root node. The root node instance is only created once the scene graph
context becomes ready.
*/
RootNode *QSGContext::rootNode() const
{
Q_D(const QSGContext);
return d->rootNode;
}
QGLContext *QSGContext::glContext() const
{
Q_D(const QSGContext);
return d->gl;
}
QSGContext *QSGContext::current;
/*!
Initializes the scene graph context with the GL context \a context. This also
emits the ready() signal so that the QML graph can start building scene graph nodes.
*/
void QSGContext::initialize(QGLContext *context)
{
Q_D(QSGContext);
Q_ASSERT(!d->gl);
d->gl = context;
d->renderer = createRenderer();
d->renderer->setClearColor(Qt::white);
d->rootNode = new RootNode();
d->rootNode->addRenderer(d->renderer);
d->renderer->setRootNode(d->rootNode);
d->textureManager = createTextureManager();
current = this;
emit ready();
}
/*!
Returns the texture manager for this scene graphc context. The
texture manager is constructed through one call to createTextureManager()
during the scene graph context's initialization
*/
TextureManager *QSGContext::textureManager() const
{
Q_D(const QSGContext);
return d->textureManager;
}
/*!
Returns if the scene graph context is ready or not, meaning that it has a valid
GL context.
*/
bool QSGContext::isReady() const
{
Q_D(const QSGContext);
return d->gl;
}
/*!
Factory function for scene graph backends of the Rectangle element.
*/
RectangleNodeInterface *QSGContext::createRectangleNode()
{
return new DefaultRectangleNode(DefaultRectangleNode::PreferTextureMaterial, this);
}
/*!
Factory function for scene graph backends of the Image element.
*/
TextureNodeInterface *QSGContext::createTextureNode()
{
return new DefaultTextureNode;
}
/*!
Factory function for scene graph backends of the Text elements;
*/
GlyphNodeInterface *QSGContext::createGlyphNode()
{
return new DefaultGlyphNode;
}
/*!
Factory function for the scene graph renderers.
The renderers are used for the toplevel renderer and once for every
ShaderEffectSource used in the QML scene.
*/
Renderer *QSGContext::createRenderer()
{
return new QMLRenderer;
}
/*!
Factory function for the texture manager to be used for this scene graph.
*/
TextureManager *QSGContext::createTextureManager()
{
QStringList args = qApp->arguments();
if (args.contains("--basic-texture-manager")) {
return new TextureManager;
} else if (args.contains("--threaded-texture-manager")) {
return new QSGThreadedTextureManager;
}
#if defined (Q_WS_MAC)
return new QSGMacTextureManager;
#elif defined (Q_WS_WIN)
return new QSGThreadedTextureManager;
#elif defined (Q_WS_QPA)
return new QSGEglFSThreadedTextureManager;
#endif
return new TextureManager;
}
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