# GraphicsStateGuardianBase

from pandac.PandaModules import GraphicsStateGuardianBase

Class : GraphicsStateGuardianBase
Description : This is a base class for the GraphicsStateGuardian class, which is itself a base class for the various GSG's for different platforms. This class contains all the function prototypes to support the double-dispatch of GSG to geoms, transitions, etc. It lives in a separate class in its own package so we can avoid circular build dependency problems.
GraphicsStateGuardians are not actually writable to bam files, of course, but they may be passed as event parameters, so they inherit from TypedWritableReferenceCount instead of TypedReferenceCount for that convenience.

## Inheritance:

GraphicsStateGuardianBase: TypedWritableReferenceCount
TypedWritableReferenceCount: TypedWritable ReferenceCount
TypedWritable: TypedObject
TypedObject: MemoryBase
MemoryBase:
ReferenceCount: MemoryBase

## Methods of GraphicsStateGuardianBase:

getClassType
getDefaultGsg
getMaxVerticesPerArray
getMaxVerticesPerPrimitive
getSupportedGeomRendering
getSupportsMultisample
getSupportsOcclusionQuery
prefersTriangleStrips
setDefaultGsg

## Methods of TypedWritableReferenceCount:

getClassType

## Methods of TypedWritable:

getClassType

## Methods of TypedObject:

getClassType
getType
getTypeIndex
isExactType
isOfType

## Methods of ReferenceCount:

getClassType
getRefCount
ref
testRefCountIntegrity
testRefCountNonzero
unref

getClassType static TypeHandle GraphicsStateGuardianBase::get_class_type(void); Undocumented function.

getDefaultGsg static GraphicsStateGuardianBase *GraphicsStateGuardianBase::get_default_gsg(void); Description: Returns a pointer to the "default" GSG. This is typically the first GSG created in an application; in a single-window application, it will be the only GSG. This GSG is used to determine default optimization choices for loaded geometry. The return value may be NULL if a GSG has not been created.

getMaxVerticesPerArray virtual int GraphicsStateGuardianBase::get_max_vertices_per_array(void) const = 0; Undocumented function.

getMaxVerticesPerPrimitive virtual int GraphicsStateGuardianBase::get_max_vertices_per_primitive(void) const = 0; Undocumented function.

getSupportedGeomRendering virtual int GraphicsStateGuardianBase::get_supported_geom_rendering(void) const = 0; Undocumented function.

getSupportsMultisample virtual bool GraphicsStateGuardianBase::get_supports_multisample(void) const = 0; Undocumented function.

getSupportsOcclusionQuery virtual bool GraphicsStateGuardianBase::get_supports_occlusion_query(void) const = 0; Undocumented function.

prefersTriangleStrips virtual bool GraphicsStateGuardianBase::prefers_triangle_strips(void) const = 0; Undocumented function.

setDefaultGsg static void GraphicsStateGuardianBase::set_default_gsg(GraphicsStateGuardianBase *default_gsg); Description: Specifies a particular GSG to use as the "default" GSG. See get_default_gsg().

getClassType static TypeHandle TypedWritableReferenceCount::get_class_type(void); Undocumented function.

getClassType static TypeHandle TypedWritable::get_class_type(void); Undocumented function.

getClassType static TypeHandle TypedObject::get_class_type(void); Undocumented function.

getType virtual TypeHandle TypedObject::get_type(void) const = 0; Derived classes should override this function to return get_class_type().

getTypeIndex int TypedObject::get_type_index(void) const; Description: Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. This is equivalent to get_type().get_index().

isExactType bool TypedObject::is_exact_type(TypeHandle handle) const; Description: Returns true if the current object is the indicated type exactly.

isOfType bool TypedObject::is_of_type(TypeHandle handle) const; Description: Returns true if the current object is or derives from the indicated type.

getClassType static TypeHandle ReferenceCount::get_class_type(void); Undocumented function.

getRefCount int ReferenceCount::get_ref_count(void) const; Description: Returns the current reference count.

ref void ReferenceCount::ref(void) const; Description: Explicitly increments the reference count. User code should avoid using ref() and unref() directly, which can result in missed reference counts. Instead, let a PointerTo object manage the reference counting automatically. This function is const, even though it changes the object, because generally fiddling with an object's reference count isn't considered part of fiddling with the object. An object might be const in other ways, but we still need to accurately count the number of references to it.

testRefCountIntegrity bool ReferenceCount::test_ref_count_integrity(void) const; Description: Does some easy checks to make sure that the reference count isn't completely bogus. Returns true if ok, false otherwise.

testRefCountNonzero bool ReferenceCount::test_ref_count_nonzero(void) const; Description: Does some easy checks to make sure that the reference count isn't zero, or completely bogus. Returns true if ok, false otherwise.

unref bool ReferenceCount::unref(void) const; Description: Explicitly decrements the reference count. Note that the object will not be implicitly deleted by unref() simply because the reference count drops to zero. (Having a member function delete itself is problematic; plus, we don't have a virtual destructor anyway.) However, see the helper function unref_delete(). User code should avoid using ref() and unref() directly, which can result in missed reference counts. Instead, let a PointerTo object manage the reference counting automatically. This function is const, even though it changes the object, because generally fiddling with an object's reference count isn't considered part of fiddling with the object. An object might be const in other ways, but we still need to accurately count the number of references to it. The return value is true if the new reference count is nonzero, false if it is zero.