Set all the elements in a render target to one value.
void ClearRenderTargetView( ID3D11RenderTargetView *pRenderTargetView, const FLOAT  ColorRGBA );
Pointer to the render target.
Type: const FLOAT
A 4-component array that represents the color to fill the render target with.
Applications that wish to clear a render target to a specific integer value bit pattern should render a screen-aligned quad instead of using this method. The reason for this is because this method accepts as input a floating point value, which may not have the same bit pattern as the original integer.
Differences between Direct3D 9 and Direct3D 11/10:
Unlike Direct3D 9, the full extent of the resource view is always cleared. Viewport and scissor settings are not applied.
When using D3D_FEATURE_LEVEL_9_x, ClearRenderTargetView only clears the first array slice in the render target view. This can impact (for example) cube map rendering scenarios. Applications should create a render target view for each face or array slice, then clear each view individually.