This method creates a texture resource.
HRESULT CreateTexture( UINT Width, UINT Height, UINT Levels, DWORD Usage, D3DMFORMAT Format, D3DMPOOL Pool, IDirect3DMobileTexture** ppTexture );
[in] Width of the top-level of the texture, in pixels. The pixel dimensions of subsequent levels will be the truncated value of half of the previous level's pixel dimension (independently). Each dimension clamps at a size of 1 pixel. Thus, if the division by 2 results in 0 (zero), 1 will be taken instead.
[in] Height of the top-level of the texture, in pixels. The pixel dimensions of subsequent levels will be the truncated value of half of the previous level's pixel dimension (independently). Each dimension clamps at a size of 1 pixel. Thus, if the division by 2 results in 0 (zero), 1 will be taken instead.
[in] The number of levels in the texture. If this is zero, Microsoft® Direct3D Mobile® will generate all texture sublevels down to 1×1 pixels for hardware that supports MIP mapped textures. Otherwise, it will create one level. Call IDirect3DMobileBaseTexture::GetLevelCount to see the number of levels generated.
[in] Set this to the flag D3DMUSAGE_RENDERTARGET (see D3DMUSAGE Values) to indicate that the surface is to be used as a render target. The resource can be passed to the pRenderTarget parameter of IDirect3DMobileDevice::SetRenderTarget. You can check that the device supports this operation by calling IDirect3DMobile::CheckDeviceFormat.
[in] Member of the D3DMFORMAT enumerated type that describes the format of all levels in the texture.
[in] Member of the D3DMPOOL enumerated type that describes the memory class into which the texture should be placed.
[out] Address of a pointer to an IDirect3DMobileTexture interface that represents the created texture resource.
If the values for Height and Width requested are greater than the maximum allowed texture dimensions, as defined by the D3DMCAPS structure members MaxTextureWidth and MaxTextureHeight, then the method returns D3DMERR_DRIVERUNSUPPORTED.
If the range specified is within the texture dimension maximums and there is insufficient memory to allocate the texture then D3DMERR_MEMORYPOOLEMPTY (see D3DMERR Values) is returned.
This method can also return D3DMERR_INVALIDCALL and E_OUTOFMEMORY.
To call IDirect3DMobileDevice::SetRenderTarget with a texture, you must select a level using IDirect3DMobileTexture::GetSurfaceLevel and pass the resulting surface to IDirect3DMobileDevice::SetRenderTarget.