Imagination PowerVR SDK Blog

sampler2DShadow supported ?

pvrshaman

#1

Dear team



i am trying to port Blurring Hard-Edged Shadows shader (http://http.developer.nvidia.com/GPUGems2/gpugems2_chapter17.html).

I tried to test sampler2DShadow in PVRSHAMAN as an experience but it fail probably using pfx is not the right approach as well ?

do you know if it is supported and how to activate extension in PVRSHAMAN (GL_EXT_shadow_samplers) by a declarative way ?

the shadow volume demo is not very performant even with low poly objects and the drop in framerate is huge.



any idea ?

kind regards

david



#2

Hi David,



PVRShaman was designed to only support core graphics API functionality. I’ve filed BRN46455 for extension support to be added to the tool.

For now, I would recommend using your games rendering engine to develop and test any extensions you need.



I’ve filed BRN46456 for the performance of the ShadowVolume to be investigated.



Regards,

Joe


#3

thank you very Much Joe


#4

PLEASE MAY YOU remove BRN46456 the shadow volum is in fact super performant as i can see, i made a mistake and was making the wrong call at the wrong place ( i was sleepy i work the nite).



many apologize about this !!! my engine is flying now and it s beautiful!!! woow !!!


#5

Hi David,



Glad to hear you’ve resolved the shadow volume performance issues. I’ve closed BRN46456. Looking forward to seeing the game up and running :slight_smile:



Joe