Allow clients to estimate how much extra memory streaming renderer will need to
render a given map context
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Key: GEOT-2514
URL: http://jira.codehaus.org/browse/GEOT-2514
Project: GeoTools
Issue Type: Improvement
Components: core render
Affects Versions: 2.5.5
Reporter: Andrea Aime
Assignee: Andrea Aime
Fix For: 2.5.6
StreamingRenderer uses back buffers (separate rasters) to render multiple
feature type styles against the same feature source in parallel, so that
rendering order is respected while the feature source data is loaded just once.
The back buffer is 32bit since transparency is needed for merging back the
results, meaning a map with many fts against the same layer will have a huge
memory consuption. Usually that is bad SLD design, and there is a way to turn
off optimized fts rendering, yet it might be useful for applications to
determine how much memory is being used by the back buffers and decide to
eventually flip off optimized fts rendering.
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