DirectX: Need help with D3DXCreateTextureFromFileEx / D3DX_DEFAULT_NONPOW2

[dxfoo]

I have a player class here that inits the player and its sprite texture for drawing. The sprite map is 399x800, and each tile is 50x50. When I execute the program, the sprite is 64x64 instead of 50x50, so the sprite is cut off to the right and bottom. What can I do to draw this texture as 50x50?

class Common
{ 
public:
	LPDIRECT3DTEXTURE9 spriteTexture;
	LPD3DXSPRITE sprite;
	D3DXVECTOR3 pos; 
	RECT srcRect;
	D3DXVECTOR3 center;
	
	// Common Constructor
	Common(void) 
	{ 
	}

	void Init(int x, int y, char *filepath)
	{
		// Set the sprite position in screen space. 
		pos = D3DXVECTOR3(x, y, 1);
 
		hr = D3DXCreateTextureFromFileEx(pd3dDevice, filepath, D3DX_DEFAULT_NONPOW2, 
			D3DX_DEFAULT_NONPOW2, 0, 0, D3DFMT_X8R8G8B8, D3DPOOL_DEFAULT, D3DX_DEFAULT, D3DX_DEFAULT, 
			D3DCOLOR_XRGB(255, 0, 255), NULL, NULL, &spriteTexture);

		if (FAILED(hr))
			return; 
		
		hr = D3DXCreateSprite(pd3dDevice, &sprite);
		if (FAILED(hr))
			return;

		center = D3DXVECTOR3(0, 0, 0);

		srcRect.left = 0;
		srcRect.top = 0;
		srcRect.right = 50;
		srcRect.bottom = 50;
	} 

	// Common Deconstructor
	~Common()
	{
		D3D_SAFE_RELEASE(spriteTexture);
		D3D_SAFE_RELEASE(sprite);
	}

	void Draw()
	{
		sprite->Begin(0);
		sprite->Draw(spriteTexture, &srcRect, &center, &pos, D3DCOLOR_XRGB(255, 255, 255));
		sprite->End();
	}
};

[VirtualAce]

Video drivers will clamp your texture size to the nearest power of 2. So 65x65 becomes 64x64 and 50x50 becomes 64x64.

Always use a power of 2 instead of those weird dimensions you posted.

I have no idea why you would want to specify to D3D to not use a power of 2.

There is a very good reason hardware uses a power of 2.

It's called multiplying and dividing through bit shifting left and right and it speeds up the operation enormously.

Forcing your hardware to do otherwise is not a good idea, if it even will do that.

[dxfoo]

I see your points and think it's a good idea, but with my pre-made sprite maps wouldn't it blur the detail?

[VirtualAce]

Yes it would. You would have to re-create the sprite images. You may be able to get away with nearest power of 2 resize in photoshop, gimp, or paint shop pro with little loss in your image.

[dxfoo]

Alright, thanks for the help Bubba.

[Magos]

So 65x65 becomes 64x64

Are you sure about this? I was under the impression it would be 128x128...