DD::Image::GeoWriter::Description Class Reference

Specialised GeoWriter Description. More...

Inherits DD::Image::Description.

List of all members.

Public Member Functions
	Description (const char *n, const char *l, GeoWriter *(*c)(WriteGeo *), License *f=0)
	Description (const char *n, GeoWriter *(*c)(WriteGeo *), License *f=0)
Static Public Member Functions
static const Description *	find (int i)
static const Description *	find (const char *name)
Public Attributes
const char *	names
const char *	label
GeoWriter *(*	constructor )(WriteGeo *)

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Detailed Description

Specialised GeoWriter Description.

Each subclass of GeoWriter should define at least one static instance of this structure. The constructor adds itself to a list that the WriteGeo operator searches to find the correct type of GeoWriter to use to write a given filename.

Sample code for a plugin:

         class MyWriter : public GeoWriter {
         static const Description d;
         ...
         };

         static GeoWriter* build() {return new MyWriter();}

         const GeoWriter::Description MyWriter::d("myf\0", "my file type", build);

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Constructor & Destructor Documentation

DD::Image::GeoWriter::Description::Description	(	const char *	n,
		const char *	l,
		GeoWriter *(*)(WriteGeo *)	c,
		License *	f = 0
	)		[inline]

Constructor that fills all fields and allows a license check.

DD::Image::GeoWriter::Description::Description	(	const char *	n,
		GeoWriter *(*)(WriteGeo *)	c,
		License *	f = 0
	)		[inline]

Simpler constructor that sets names and label to same value.

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Member Function Documentation

const GeoWriter::Description * GeoWriter::Description::find

(

int

i

)

[static]

Return the i'th GeoWriter::Description known about, or return a null pointer for the last one.

Referenced by DD::Image::WriteGeo::set_file_type().

const GeoWriter::Description * GeoWriter::Description::find

(

const char *

name

)

[static]

Search all the defined GeoWriter::Descriptions for one whose name matches the passed string, or return NULL if none. This will also try to plugin_load("xyzWriter") (where xyz is id) in order to find external file writing code.

References names, and DD::Image::plugin_load().

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Member Data Documentation

const char* DD::Image::GeoWriter::Description::names

Null separated list (as in "sgi\0rgb\0") of identifiers for this file type.

If "xyz" in in this list then a filename of "*.xyz" or "xyz:*" is considered to be this type.

Referenced by find().

const char* DD::Image::GeoWriter::Description::label

User-friendly version of the name.

GeoWriter*(* DD::Image::GeoWriter::Description::constructor)(WriteGeo *)

Make an instance of the writer. This cannot fail, instead the method frame(n) on the writer should try to open the output file and produce any error messages.

Referenced by DD::Image::WriteGeo::set_file_type().