LPRO Semi-Transparency (for HWA)

[prester]

About Active object's effect "Alpha-Blending coefficient", Probably basic, but not be able to how to implement on my test extension.


I found an old forum post, unfortunately not for HWA.
https://community.clickteam.com/threads/50441-LPRO-Semi-Transparency


"Sprite display structure" at Cncf.h, "ros.rsFlash" "ros.rsFlags" "rsEffect" "rsEffectParam" etcs..
At first thought it was simple, actually not so easy with try and errors what i realized.
Any sample codes or Documents are there?

P.S. If it is possible, from the extension, i wish to control the shader effect param.



Thanks.

[defisym]

Still experimental.

https://github.com/defisym/OpenFusio...ectUtilities.h

https://github.com/defisym/OpenFusio...ffectUtilities

Note that you need an unreleased SDK with shader class.

[prester]

Thanks for your quick replay! >> defisym
I'll check it soon now.

[Yves]

If you want to retrieve the blend coefficient:

		int nBlendCoef = 0;
		switch(rdPtr->rs.rsEffect & BOP_MASK) {
		case BOP_EFFECTEX:
			{
				CEffectEx* pEffectEx = (CEffectEx*)rdPtr->rs.rsEffectParam;
				if ( pEffectEx != NULL )
					nBlendCoef = 255 - (pEffectEx->GetRGBA() >> 24);
			}
			break;
		case BOP_BLEND: // old semi-transparency coef
			nBlendCoef = 255 - SEMITRANSPTOALPHA(rdPtr->rs.rsEffectParam);
			break;
		default:
			if ( rdPtr->rs.rsEffect & BOP_RGBAFILTER )
				nBlendCoef = 255 - (((DWORD)rdPtr->rs.rsEffectParam) >> 24);
			break;
		}

[prester]

très bien merci! > Yves

Thanks a lot!

[prester]

Still Hard-Coding.. but the result is great.
Fixed Yves code.

void TEST::SetSemiTrans(LPRO myobj, int coef)
{
	// LPRO myobj = (LPRO)CNC_GetParameter(rdPtr);
	int nBlendCoef = 0;
	
	switch (myobj->ros.rsEffect & BOP_MASK) {
	case BOP_EFFECTEX:
	{
		CEffectEx* pEffectEx = (CEffectEx*)myobj->ros.rsEffectParam;// Need #include    "EffectEx.h" from MMF Headers

		if (pEffectEx != NULL)
			nBlendCoef = 255 - (pEffectEx->GetRGBA() >> 24);// pEffectEx->GetRGBA() == default >> -1; >> result calc == 0;
			int a = 939524095;// Hardcode
			pEffectEx->SetRGBA(a);// find at "EffectEx.h"
		
	}
	break;
	case BOP_BLEND: // old semi-transparency coef
		nBlendCoef = 255 - SEMITRANSPTOALPHA(myobj->ros.rsEffectParam);
		break;
	default:
		if (myobj->ros.rsEffect & BOP_RGBAFILTER)
			nBlendCoef = 255 - (((DWORD)myobj->ros.rsEffectParam) >> 24);
		break;
	}
	;
}
;