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| |
| #include "fbitem.h" |
| #include <QtGui/QOpenGLFramebufferObject> |
| #include <QtGui/QOpenGLContext> |
| #include <QtGui/QOpenGLFunctions> |
| #include <QtCore/QDebug> |
| |
| #if QT_CONFIG(opengl) |
| class FbRenderer : public QQuickFramebufferObject::Renderer |
| { |
| public: |
| FbRenderer() { } |
| |
| // The lifetime of the FBO and this class depends on how QQuickWidget |
| // manages the scenegraph and context when it comes to showing and hiding |
| // the widget. The actual behavior is proven by the debug prints. |
| ~FbRenderer() override { |
| qDebug("FbRenderer destroyed"); |
| } |
| |
| void render() override { |
| QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions(); |
| f->glClearColor(c, 0, 0, 1); |
| f->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); |
| c += 0.01f * dir; |
| if (c >= 1.0f || c <= 0.0f) |
| dir *= -1; |
| update(); |
| } |
| |
| QOpenGLFramebufferObject *createFramebufferObject(const QSize &size) override { |
| qDebug() << "Creating FBO" << size; |
| QOpenGLFramebufferObjectFormat format; |
| format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil); |
| return new QOpenGLFramebufferObject(size, format); |
| } |
| |
| private: |
| float c = 0; |
| int dir = 1; |
| }; |
| #endif |
| |
| QQuickFramebufferObject::Renderer *FbItem::createRenderer() const |
| { |
| #if QT_CONFIG(opengl) |
| return new FbRenderer; |
| #else |
| return nullptr; |
| #endif |
| } |