rendering to texture problem

Graphics and GPU Programming Programming

Started by majak August 04, 2005 04:00 AM

3 comments, last by majak 18 years, 8 months ago

122

Author

August 04, 2005 04:00 AM


	D3DLOCKED_RECT RC;
	Texture->LockRect(0, &RC, 0, 0);	
	int* Pixels = (int*)RC.pBits;		
	int* DPixels = (int*)Pixels;		

	for(int k=0; k<pixelAntal; k++){					

		*DPixels++ = buffer[k];	
		Pixels += RC.Pitch;	
	}//end for
	Texture->UnlockRect(0);

This part of my code I just copied from an tutorial, so I don't really undestand it, could someone explain it? Also I think I'm doing something wrong in this part: int* Pixels = (int*)RC.pBits; int* DPixels = (int*)Pixels; My buffer array is an int array, but instead of drawing my picture on the entire screen, it devides it in eight and draw the picture eight times...

majak

122

Author

August 04, 2005 04:19 AM

I don't know if it means anything, but I have this:

Present_Parameters.AutoDepthStencilFormat = D3DFMT_D16;

should it be something else, since I operate with 24 bit texture?

HRESULT Result = D3DXCreateTexture(D3D_Device, the_width, the_height, 1, 0, D3DFMT_R8G8B8, D3DPOOL_MANAGED, &Texture);

the_width = 512;
the_height = 512;

majak

122

Author

August 04, 2005 05:39 AM

*DPixels++ = buffer[k];
Pixels += RC.Pitch;

the pitch counts the bytes in the texture and since I use ints, it's four times bigger than my width. Anyone who knows how to deal with that?

Also I get like two pictures on top of each other!!
So instead og having one big picture, I have 2*4 small pictures..

majak

122

Author

August 08, 2005 03:04 AM

If I remove this part: Pixels += RC.Pitch;
it does not change the image! What am I doing wrong?

majak

122

Author

August 08, 2005 03:54 AM

int next = 0;	D3DLOCKED_RECT RC;				Texture->LockRect(0, &RC, 0, 0);		unsigned int *bytePointer =(unsigned int*)RC.pBits;	for (DWORD y=0;y<the_height;y++)	{		for (DWORD x=0;x<the_width;x++)		{			DWORD index=(x*4+(y*(RC.Pitch)));			bytePointer[index]= buffer[next];			next++;		}	}	Texture->UnlockRect(0);

I have no idea if I'm the right track, but as far as I can see I need to deal with the Pitch.. This piece og code does not work, please help me undestand what happends here.

Thanks

rendering to texture problem

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rendering to texture problem

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