Hi Guys,

Just wondering if I could get some guidance on creating dynamic textures (I think that is the term) for something that is in memory.

If I have a pointer to the start of a pure RGBA stream, how could I make this into a texture to display on a sprite?

I have all the framework ready for this and am using a texture from a file, but just wanting to try something different here.

Many thanks in advance

OK, I am close. I am upto the point where I need to copy the data back. I have a locked rect. But not sure how to do this properly.

I have this, bit it is throwing a bunch of compiler errors;

There is a RAW bitmap starting at bmpTmp that I am trying to send to the texture.

mRenderer->textureVideoGet()->LockRect(0,&lockedRect,&rect,0);
 
for(i=0;i<(videoWidth*videoHeight*3);i+=3)
{
	idx=(x*4)+y*lockedRect.Pitch*4;
 
	lockedRect.pBits[idx]=bmpTmp[i]; //b
	lockedRect.pBits[idx+1]=bmpTmp[i+1]; //g
	lockedRect.pBits[idx+2]=bmpTmp[i+2]; //r
	lockedRect.pBits[idx+3]=255; //a
 
	x++;
	if(x>=videoWidth)
	{
		x=0;
		y--;
		if(y<0)
			y=0;
	}
}

mRenderer->textureVideoGet()->UnlockRect(0);

The errors I am getting are these (one set each for each lockedRect.pBits line);

error C2036: 'void *' : unknown size
error C2120: 'void' illegal with all types

Any help would be great!

Thanks in advance

RECT rect={0,640,0,480};
D3DLOCKED_RECT lockedRect={0};

hr=mRenderer->textureVideoGet()->LockRect(0,&lockedRect,&rect,0);
if(FAILED(hr))
{
	std::cout<<"Error: "<<hr<<"\r\n";
	system("PAUSE");
	return 0;
}

unsigned char* bytes=(unsigned char*)lockedRect.pBits;

for(i=0;i<20;i=i+4)
{
	bytes[i]=255;
	bytes[i+1]=0;
	bytes[i+2]=0;
	bytes[i+3]=255;
}

mRenderer->textureVideoGet()->UnlockRect(0);

// render the sprite queue
mRenderer->renderSpriteQueue();

// display framerate data
lps=mRenderer->framerateGetReal();
lps=lps-1;
if(lps<0)
	lps=0;

itoa(lps,szBuffer,10);
strcpy(szBuffer2,"Frame Rate: ");
strcat(szBuffer2,szBuffer);
strcat(szBuffer2," FPS");
mRenderer->renderDebugText(14,14,szBuffer2);

// Sprite renders ok with this texture
if(FAILED(D3DXCreateTextureFromResourceA(d3dDevice,GetModuleHandle(NULL),MAKEINTRESOURCE(IDB_PNG1),&pTexture)))
	MessageBox(0,"Can not find file","Resource not found",0);

// Sprite won't work with this texture
if(FAILED(D3DXCreateTexture(d3dDevice,1024,1024,0,NULL,D3DFMT_A8R8G8B8,D3DPOOL_MANAGED,&pVideoTexture))) 
	MessageBox(0,"Can not create blank video texture","Resource not found",0);

for(i=0;i<20;i=i+4)
{
    bytes[i]=255;
    bytes[i+1]=0;
    bytes[i+2]=0;
    bytes[i+3]=255;
}

Unless I'm missing something, you're only setting 5 pixels. Is that your intent?

if(FAILED(D3DXCreateTexture(d3dDevice,1024,1024,0,D3DUSAGE_DYNAMIC,D3DFMT_A8R8G8B8,D3DPOOL_MANAGED,&pVideoTexture))) 
	MessageBox(0,"Can not create blank video texture","Resource not found",0);

The docs say you can't create a texture in D3DPOOL_MANAGED.

What error are you getting? What does the debug output provide?

Before you try D3DPOOL_DEFAULT, check your devcaps to ensure you can support the texture parameters.