Helper allowing 'intelligent' writing of external files (images, shaders, etc.), regarding to a main file (a scene), especially in plugins. More...

Collaboration diagram for osgDB::ExternalFileWriter:

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Classes
struct	ObjectData

Public Types
typedef std::map< const osg::Object *, ObjectData >	ObjectsSet
	Set of written objects, with their absolute writing path. More...

Public Member Functions
	ExternalFileWriter (const std::string &srcDirectory, const std::string &destDirectory, bool keepRelativePaths, unsigned int allowUpDirs=0)
	Builds the helper class with all options. More...

	ExternalFileWriter (const std::string &destDirectory)
	Short constructor used when not relativising objects paths, or when having no initial model file (which is pretty the same here).

bool	write (const osg::Object &obj, const osgDB::Options options, std::string out_absolutePath=NULL, std::string *out_relativePath=NULL)
	Writes the current object if not already done. More...

const ObjectsSet &	getObjects () const
	Returns the written objects.

Protected Types
typedef std::multimap< unsigned int, const osg::Object * >	SearchMap

typedef unsigned int	ObjectIndex
	Integer type used for indices of unnamed objects.

Protected Member Functions
void	generateObjectName (std::string &out_relativePath, std::string &out_absolutePath, int type)
	Generates a unique name for an object to be written on disk. More...

bool	absoluteObjectPathExists (const std::string &path)

Protected Attributes
ObjectsSet	_objects

SearchMap	_searchMap
	Map used to search by absolute file path.

ObjectIndex	_lastGeneratedObjectIndex

const std::string	_srcDirectory

const std::string	_destDirectory

bool	_keepRelativePaths

const unsigned int	_allowUpDirs

Detailed Description

Helper allowing 'intelligent' writing of external files (images, shaders, etc.), regarding to a main file (a scene), especially in plugins.

Goals are:

Enable writing out objects only once (even if referenced multiple times)
Handle duplicates (avoid writing two different objects at the same place, renaming files as needed)
Handle directory creation when paths don't just exist
Generate writing paths which may keep original directory structure (depending on user wishes). Ex: Reading: model.osg and images/img1.jpg Writing with 'keepRelativePaths': /somePath/newmodel.osg and /somePath/images/img1.jpg Writing without 'keepRelativePaths': /somePath/newmodel.osg and /somePath/img1.jpg
Author
Sukender

Todo:
Handling of naming constraints (such as "8.3" names in 3DS)

Member Typedef Documentation

◆ ObjectsSet

typedef std::map<const osg::Object*, ObjectData> osgDB::ExternalFileWriter::ObjectsSet

Set of written objects, with their absolute writing path.

Objects being passed to the write() method but which have failed to be effectively written are also included.

Constructor & Destructor Documentation

◆ ExternalFileWriter()

osgDB::ExternalFileWriter::ExternalFileWriter	(	const std::string &	srcDirectory,
		const std::string &	destDirectory,
		bool	keepRelativePaths,
		unsigned int	allowUpDirs = `0`
	)

Builds the helper class with all options.

Parameters

srcDirectory	Directory of the initial main file (if any), used as a base when relativising objects names. Not used if keepRelativePaths==false.
destDirectory	Directory where to write the main file.
keepRelativePaths	If true, then relative paths of source objects are kept if possible (ex: If an image is initially "imageDir/image.jpg" relatively to the source dir, then we'd like to get "destDir/imageDir/image.jpg"). If false, then only the simple file name is used to write the object file.
allowUpDirs	When relativising objects paths, sets the maximum number of directories the objects can be written "up" the destination directory. Not used if keepRelativePaths==false. Examples: If an image is initially "../image.jpg" relatively to the source dir AND if we allow one dir level up, then we'd like to get "destDirParent/destDir/../image.jpg" (= "destDirParent/image.jpg"). If we DO NOT allow one dir level up, then we'd like to get "destDir/image.jpg".

Member Function Documentation

◆ generateObjectName()

void osgDB::ExternalFileWriter::generateObjectName	(	std::string &	out_relativePath,
		std::string &	out_absolutePath,
		int	type
	)

protected

Generates a unique name for an object to be written on disk.

Side effect: updates _lastGeneratedObjectIndex to the index associated with the returned name.

◆ write()

bool osgDB::ExternalFileWriter::write	(	const osg::Object &	obj,
		const osgDB::Options *	options,
		std::string *	out_absolutePath = `NULL`,
		std::string *	out_relativePath = `NULL`
	)

Writes the current object if not already done.

Parameters

	obj	Object to write, using corresponding osgDB::write method.
	options	Writing options to pass to corresponding osgDB::write method.
[out]	out_absolutePath	Pointer to a string to be filled with absolute writing path, or NULL.
[out]	out_relativePath	Pointer to a string to be filled with write path relative to the destination directory if possible (absolute path if not), or NULL.

Returns: true on success, false otherwise.

The documentation for this class was generated from the following file:

/home/karlu20/private/installs/OpenSceneGraph/include/osgDB/ExternalFileWriter

Classes

Public Types

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes