Refactoring pipeline concept #2: Got rid of distinguishing between AbstractPipeline and VisualizationPipeline. Every AbstractPipeline is also a VisualizationPipeline. However, AbstractPipeline does not care about evaluating its components - this has to be implemented in its subclasses.
AutoEvaluationPipeline subclasses AbstractPipeline and automatically evaluates the pipeline by listening to the signals of its components and calling the corresponding process() methods.

QtThreadedCanvas used to ignore all repaint events send to it by Qt in
order to avoid problems with threading. As a result, however, it would
become blank when docked/undocked, and display garbage in those of its
regions that some other widgets have moved over.

To fix this, the API of TGT's Painter class had to be slightly modified
and now mirrors that of Canvas with regard to painting-related
operations. The paint method has been made protected; it's supposed to
implement the painting logic and shouldn't be called directly. A public
repaint method has been introduced to let canvases notify their
associated painters that they need to be redrawn. The default
implementation simply calls paint() immediately; threaded painters,
however, override it to schedule render jobs that run in separate
threads.

All existing threaded painters have been updated to reduce the
visibility of their paint methods and provide public repaint functions.
Consequently, QtThreadedCanvas can now properly handle repaint events by
delegating to its associated painter's repaint method.

 * Fixed Issue #38: Made common GLSL header conform to the standards (no samplers in structs)
 * Fixed failing destruction of OpenGL buffers when destructing GeometryData from threads without OpenGL context
 * Fixed wrong pointers in GLContexts due to using this pointer of incompletely constructed class

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@463 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@449 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@338 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@335 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@326 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * added update_legal_header.py script for updating the legal header in all code files of the project
 * ran the file => all TUMVis source files now contain the legal header

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@231 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * introducing TumVisApplication for easy and straight-forward setup of pipelines, contexts, evaluators, etc.
 * VisualizationPipeline must not get its canvas during construction anymore

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@203 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@199 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * QtContextManager uses QtThreadedCanvas
 * cleaned up tgt


git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@198 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * added Runnable interface
 * started letting PipelineEvaluator manage its thread itself
 * documentation

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@196 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

It took quite some time, but this commit introduces thread-safe management and access to multiple OpenGL contexts.
 * added tgt::QtContextManager for managing multiple OpenGL contexts
 * adapted tgt::GLContext and tgt::QtGLContext, tgt::QtThreadedPainter
 * added PipelineEvaluator for evaluating pipelines in separate threads
 * added various lock/sync features to processors, pipelines, and processors

However, there's still plenty of clean-up work to do: some parts of the tgt library are quite messed up and the core library interfaces need some polishing...


git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@195 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * introduced abstract tgt::GLContext for thread-safe management of an OpenGL context
 * introduced Qt-threading based tgt::QtGLContext, tgt::QtThreadedCanvas and tgt::QtThreadedPainter
 * adapted tumvis-core and tumvis-application to new OpenGL context handling

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@194 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * Moved paint() method out of VisualizationPipeline back to TumVisPainter
 * started using signals/slots instead of simple observer implementation

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@193 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@164 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@163 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@161 bb408c1c-ae56-11e1-83d9-df6b3e0c105e