Function SDL_SetRenderViewport 

pub unsafe extern "C" fn SDL_SetRenderViewport(
    renderer: *mut SDL_Renderer,
    rect: *const SDL_Rect,
) -> bool

Set the drawing area for rendering on the current target.

Drawing will clip to this area (separately from any clipping done with SDL_SetRenderClipRect), and the top left of the area will become coordinate (0, 0) for future drawing commands.

The area’s width and height must be >= 0.

Each render target has its own viewport. This function sets the viewport for the current render target.

Parameters

• renderer: the rendering context.
• rect: the SDL_Rect structure representing the drawing area, or NULL to set the viewport to the entire target.

Return value

Returns true on success or false on failure; call SDL_GetError() for more information.

Thread safety

This function should only be called on the main thread.

Availability

This function is available since SDL 3.2.0.

See also

• SDL_GetRenderViewport
• SDL_RenderViewportSet