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From Ralf Habacker, "The appended patch fixes this issue by adding a virtual method named supportedFeatures() to the class ReaderWriter, which could be overriden by a specific plugin to adjust the set of features.

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Single features are implemented as bits asother enums in ReaderWriter class already does, so that combinations are possible and fast comparison operations are possible

By default all features are enabled.

I have added this virtual method to the dot plugin to get an idea how to use these features.

With this patch osgconv --formats shows an additional line 'features' for each plugin"
This commit is contained in:
Robert Osfield
2009-03-10 15:00:39 +00:00
parent 0669107287
commit 287ff37b34
4 changed files with 82 additions and 1 deletions
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1
include/osgDB/PluginQuery
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@@ -39,6 +39,7 @@ class ReaderWriterInfo : public osg::Referenced
ReaderWriter::FormatDescriptionMap protocols;
ReaderWriter::FormatDescriptionMap extensions;
ReaderWriter::FormatDescriptionMap options;
ReaderWriter::Features features;
protected:

32
include/osgDB/ReaderWriter
View File

@@ -48,6 +48,7 @@ class OSGDB_EXPORT ReaderWriter : public osg::Object
META_Object(osgDB,ReaderWriter);
typedef std::map<std::string, std::string> FormatDescriptionMap;
typedef std::list<std::string> FeatureList;
/** return which protocols are supported by ReaderWriter. */
virtual const FormatDescriptionMap& supportedProtocols() const { return _supportedProtocols; }
@@ -61,6 +62,37 @@ class OSGDB_EXPORT ReaderWriter : public osg::Object
/** return true if ReaderWriter accepts specified file extension.*/
virtual bool acceptsExtension(const std::string& /*extension*/) const;
/// bit mask for setting up which feature types are available for read and/or write
enum Features
{
FEATURE_NONE = 0,
FEATURE_READ_OBJECT = 1<<0,
FEATURE_READ_IMAGE = 1<<1,
FEATURE_READ_HEIGHT_FIELD = 1<<2,
FEATURE_READ_NODE = 1<<3,
FEATURE_READ_SHADER = 1<<4,
FEATURE_WRITE_OBJECT = 1<<5,
FEATURE_WRITE_IMAGE = 1<<6,
FEATURE_WRITE_HEIGHT_FIELD = 1<<7,
FEATURE_WRITE_NODE = 1<<8,
FEATURE_WRITE_SHADER = 1<<9,
FEATURE_ALL = FEATURE_READ_OBJECT |
FEATURE_READ_IMAGE |
FEATURE_READ_HEIGHT_FIELD |
FEATURE_READ_NODE |
FEATURE_READ_SHADER |
FEATURE_WRITE_OBJECT |
FEATURE_WRITE_IMAGE |
FEATURE_WRITE_HEIGHT_FIELD |
FEATURE_WRITE_NODE |
FEATURE_WRITE_SHADER
};
/** return available features*/
virtual Features supportedFeatures() const;
/** return feature as string */
static FeatureList featureAsString(Features feature);
/** Options base class used for passing options into plugins to control their operation.*/
class Options : public osg::Object
{