DirectX: Need help with D3DXCreateTextureFromFileEx / D3DX_DEFAULT_NONPOW2

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?

Code:

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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();
        }
};

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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.

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

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.

Alright, thanks for the help Bubba.

Quote:

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So 65x65 becomes 64x64

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