Creates D3D texture from image in file in format supported by Imaging.

function LoadD3DTextureFromFile(const FileName: string; 
                                Device: IDirect3DDevice9; 
                                var Texture: IDirect3DTexture9; 
                                CreatedWidth: PLongInt = nil; 
                                CreatedHeight: PLongInt = nil): Boolean;

ImagingDirect3D9 (at line 76)

You can use CreatedWidth and Height parameters to query dimensions of created textures (it could differ from dimensions of source image).