FGFS-4.1/OpenSceneGraph
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Added osgDB::readShaderFileWithFallback(..) convinience functions to make it easier to set up reading external shader files with a built in fallback.

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git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14636 16af8721-9629-0410-8352-f15c8da7e697
This commit is contained in:
Robert Osfield 2014-12-24 10:13:42 +00:00
parent f984f6032f
commit c57e62e799
1 changed files with 22 additions and 0 deletions
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22
include/osgDB/ReadFile
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@ -195,6 +195,28 @@ inline osg::Shader* readShaderFile(osg::Shader::Type type, const std::string& fi
}
/** Read an osg::Shader from file and set to specified shader type, if a shader isn't loaded fallback to specific shader source.
* Use the Options object to control cache operations and file search paths in osgDB::Registry.
* The osgDB::Registry is used to load the appropriate ReaderWriter plugin
* for the filename extension, and this plugin then handles the request
* to read the specified file.*/
inline osg::Shader* readShaderFileWithFallback(osg::Shader::Type type, const std::string& filename, const Options* options, const char* fallback)
{
osg::Shader* shader = readShaderFile(filename, options);
if (shader && type != osg::Shader::UNDEFINED) shader->setType(type);
if (!shader) shader = new osg::Shader(type, fallback);
return shader;
}
/** Read an osg::Shader from file and set to specified shader type, if a shader isn't loaded fallback to specific shader source.
* The osgDB::Registry is used to load the appropriate ReaderWriter plugin
* for the filename extension, and this plugin then handles the request
* to read the specified file.*/
inline osg::Shader* readShaderFileWithFallback(osg::Shader::Type type, const std::string& filename, const char* fallback)
{
return osgDB::readShaderFileWithFallback(type, filename, Registry::instance()->getOptions(), fallback);
}
/** Read an osg::Script from file.
* Return valid osg::Script on success,
* return NULL on failure.