(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_SetRenderViewport

Set the drawing area for rendering on the current target.

Header File

Syntax

bool SDL_SetRenderViewport(SDL_Renderer *renderer, const SDL_Rect *rect);

Function Parameters

SDL_Renderer *	renderer	the rendering context.
const SDL_Rect *	rect	the SDL_Rect structure representing the drawing area, or NULL to set the viewport to the entire target.

Return Value

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

Remarks

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.

Thread Safety

You may only call this function from the main thread.

Version

This function is available since SDL 3.1.3.