Version 1 (modified by 14 years ago) ( diff ) | ,
---|
MapServer Rendering Plugin Status
This page documents the rendering plugin implementation status for MapServer version 6.0.
What Works:
- create image function (into an imageObj)
- notes...
- basic vector API is in place (e.g. draw line, fill polygon, etc...)
- Cairo Graphics is implemented in trunk
- AGG is minimally implemented in a sandbox
- KML SoC work uses this API
- ...
- basic text API is in place
- performance concerns regarding font handling
- per glyph or per string?
- symbols support works for the most part
- exception in PIXMAP symbols
Remaining Tasks:
- implement lazy PIXMAP loading
- write our own image loaders (into an imageObj), this is part of the rendering API
- using libpng, libjpeg and something for GIF
- drivers could choose to implement their own (e.g. GD)
- write our own image writers (from an imageObj), again, this is part of the rendering API
- using libpng, libjpeg and something for GIF
- drivers could choose to implement their own (e.g. GD)
- Thomas has implemented PNG and JPEG writers already, minus color pre-preocessing and some other output optionss
- raster API implementation
- how to deal with potentially different image buffers (e.g. GD vs. everything else)?
- implement color pre-processing
- quantization
- is there still a need for a partial palette?
- existing renderer re-writes
- GD
- vector drivers (PDF/SVG/Flash), may, in some cases, be replaced by Cairo
- symbol API gaps
- use an imageObj instead of a gdImagePtr
- vector API gaps
- polygon fills using a tile
- hatching support
- possibility exists to create a hatch generator (e.g. all the lines) and we'd pass those to the renderer
- GD driver has code to compute the lines, but they aren't clipped
- remove GD dependencies from certain functional areas, specifically scalebar, legend and reference map generation
- embedding may be difficult, however, if the symbolObj changes to use imageObj's for PIXMAP symbols then the current process can probably be retained
Note:
See TracWiki
for help on using the wiki.