IDirect3DDevice9::SetViewport Method

Sets the viewport parameters for the device.

Syntax

HRESULT SetViewport(      

    CONST D3DVIEWPORT9 *pViewport
);

Parameters

pViewport
[in] Pointer to a D3DVIEWPORT9 structure, specifying the viewport parameters to set.

Return Value

If the method succeeds, the return value is D3D_OK.
If the method fails, it will return D3DERR_INVALIDCALL. This will happen if pViewport is invalid, or if pViewport describes a region that cannot exist within the render target surface.

Remarks

Microsoft?Direct3D?sets the following default values for the viewport.
D3DVIEWPORT9 vp;
vp.X      = 0;
vp.Y      = 0;
vp.Width  = RenderTarget.Width;
vp.Height = RenderTarget.Height;
vp.MinZ   = 0.0f;
vp.MaxZ   = 1.0f;
IDirect3DDevice9::SetViewport can be used to draw on part of the screen. Make sure to call it before any geometry is drawn so the viewport settings will take effect.
To draw multiple views within a scene, repeat the IDirect3DDevice9::SetViewport and draw geometry sequence for each view.