rfm2.vp.pxr_light.Vp2ShaderCache Class Reference

Inheritance diagram for rfm2.vp.pxr_light.Vp2ShaderCache:

Collaboration diagram for rfm2.vp.pxr_light.Vp2ShaderCache:

Public Member Functions
def	__init__
def	shader_param_list
def	__del__
def	get
def	ref_count_incr
def	ref_count_decr
def	stats

Public Attributes
	cache
	shader_desc

Detailed Description

Because VP2 is consolidating render items with matching VB and shader
instance, we implement a simple shader instance cache.
This class will maintain a dict of shader instance with their ref count.
The key is the input parameters.
If a shader instance for a given color already exists, it will return it.
Otherwise, a new shader instance with that color will be created, cached
and returned.

Constructor & Destructor Documentation

def rfm2.vp.pxr_light.Vp2ShaderCache.__init__

(

self

)

Create the cache. We also cache parameter lists per shaders to be
able to safely set their values.

def rfm2.vp.pxr_light.Vp2ShaderCache.__del__

(

self

)

Release all shader instances when the cache is destroyed.

Member Function Documentation

def rfm2.vp.pxr_light.Vp2ShaderCache.get	(		self,
			old_key,
			kw
	)

Return a shader instance using the requested color. We create new
instances on demand and cache them for re-use.
The instances are reference-counted and will be deleted when needed.

Here is the call graph for this function:

def rfm2.vp.pxr_light.Vp2ShaderCache.ref_count_decr	(		self,
			key
	)

Decrement the ref count for the shader with this key.
If the ref count drops below 1, we release the MShaderInstance and
delete the cache entry.

Here is the call graph for this function:

Here is the caller graph for this function:

def rfm2.vp.pxr_light.Vp2ShaderCache.ref_count_incr	(		self,
			key
	)

Increment the ref count for the shader with this key.

Here is the caller graph for this function:

def rfm2.vp.pxr_light.Vp2ShaderCache.shader_param_list	(		self,
			shader_name
	)

Return the shader parameter list and lazily fill the cached shader
param list on cache miss.

Here is the caller graph for this function:

def rfm2.vp.pxr_light.Vp2ShaderCache.stats

(

self

)

Print cache contents for debugging.

Member Data Documentation

rfm2.vp.pxr_light.Vp2ShaderCache.cache

rfm2.vp.pxr_light.Vp2ShaderCache.shader_desc

---

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

• /data/wlw/renderman_root/rat/apps/rfm/scripts/rfm2/vp/pxr_light.py