Opened 21 years ago
Closed 13 years ago
#305 closed defect (worksforme)
symbol SIZE in CLASS is not exact (one pixel too small)
Reported by: | Owned by: | sdlime | |
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Priority: | high | Milestone: | |
Component: | Renderer API | Version: | 4.0 |
Severity: | normal | Keywords: | |
Cc: | sgillies@… |
Description (last modified by )
When rendering point and polygon symbols (I have not tested lines), I have discovered that the SIZE parameter of a CLASS specifies: "the rendered vertical size of the symbol in pixels" - 1. This applies to both vector and raster symbols. This is unexpected behaviour and not documented(?). It means that people who want to have full control of their symbols appearance will be very confused. What are the reasons for this strange behaviour (apart from indexing in C)? I hope that the semantics of the SIZE parameter can be changed so that it gives the exact vertical size of the symbol in pixels. The problem is, of course with legacy symbol sets and mapfiles, but since the changes that are made in Mapserver 3.7/4 are already significant I hope it will be possible to make the change.
Change History (5)
comment:2 by , 20 years ago
Status: | new → assigned |
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Yes, still unresolved. There are bigger fish to fry since there's such an easy workaround for this one.
comment:3 by , 19 years ago
I agree that this is a minor issue, but for the sake of new users, it would be nice to either fix this or document the (unexpected) behaviour. In http://mapserver.gis.umn.edu/doc/mapfile-reference.html the explanation of size should be changed to mirror the actual behaviour. Under STYLE object: Current eplanation: SIZE [integer] Height, in pixels, of the symbol/pattern to be used. Only useful with scalable symbols. Default is 1. Modified explanation: SIZE [integer] Height, in pixels, of the symbol/pattern to be used. Only useful with scalable symbols. Default is 1. Due to an unresolved bug, the actual size of the rendered vector symbols will be one pixel more than the specified size. In the CLASS object a similar explanation is given for SIZE (perhaps these explanations should be equal?). This should also be modified accordingly.
comment:4 by , 19 years ago
Cc: | added |
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comment:5 by , 13 years ago
Component: | MapServer CGI → Renderer API |
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Description: | modified (diff) |
Resolution: | → worksforme |
Status: | assigned → closed |
closing as the rendering pipeline has changed in 6.0
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