josm-plugin-opengl

This is a josm plugin that replaces the default, Java2D map view with a version rendered using OpenGL.

Installing

See Releases

Compiling

For this plugin, you need a special version of JOSM and of GLG2D. For the ease of compiling, GLG2D is just added to the plugin by a symbilic link, so you need Linux to compile this.

Check out those repositories in the same directory:

https://github.com/michaelzangl/josm-plugin-opengl
https://github.com/openstreetmap/josm (JOSM with changes for this plugin).
https://github.com/michaelzangl/glg2d (Bug fixes for GLG2D)

Then run:

ant josm/build.xml
ant josm-plugin-opengl/build.xml

Developing

I use eclipse for developing. Simply add josm and josm-plugin-opengl as eclipse projects.

All classes have Javadocs. Those are the most important entry points to get started:

OpenGLViewPlugin is the main entry point for the plugin.
MapPanel is the OpenGL-replacement of the MapView
LayerDrawManager does the layer drawing and replaces MapView#paint()
StyleGenerationManager generates the styles and geometries for the current frame and - in a background thread - for future frames.
StyleGeometryCache stores the geometries generated and handles invalidation.
MergeGroup contains an explonation of the way geometries are stored.
RecordingGraphics2D is our Graphics2D instance that records all draw calls and stores them for later use.
the SimpeBuferPool pools our vertex buffers to avoid many allocate()-calls.

michaelzangl/josm-plugin-opengl

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