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CreateRenderTarget

Started by TheKrust Dec 16, 2007 at 6:26 PM 2 replies 2.2k views

Original Post

Dec 16, 2007 at 6:26 PM

So I do the CreateRenderTarget method, it doesn't return and error and everything peachy. Nice... but how exatly do I get this wonderful new surface into a displayable texture? I typically use D3DUSAGE_RENDERTARGET and the GetSurfaceLevel method, but that doesn't seem to be working . I will admit I didn't do that much with it because I don't want to invest too much time in something that's a waste. So anyway, any idea how I can get this to render to a texture? (please no alternative AA proposals, I already know about those)

Namethatnobodyelsetook

Dec 16, 2007 at 8:20 PM

If you need AA rendering, you make your surface with AA as you're doing, then StretchRect into surface level 0 of a texture.

If you don't need AA, just make a render target texture and render directly into surface level 0.

MJP

Dec 16, 2007 at 8:21 PM

I assume you're doing this resolve a multisampled render target? In that case you use IDirect3DDevice9::StretchRect to copy the data from the multisampled render target to the surface of a texture created with D3DUSAGE_RENDERTARGET. Like this:

//msTarget is the multisampled render targetLPDIRECT3DSURFACE9 rtSurface = NULL;rtTexture->GetSurfaceLevel(0, &rtSurface);d3dDevice->StretchRect(msTarget, NULL, rtSurface, NULL, D3DTEXF_NONE);

TheKrust

Dec 16, 2007 at 10:22 PM

Ah, ok I'll give it a shot. I've always seemed to think StretchRect was a slow operation though. How does it measure to speed against direct rendering on a texture?

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