SDL_SetRenderViewport - Man Page

#include <SDL3/SDL_render.h>

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

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.

renderer

the rendering context.

rect

the SDL_Rect structure representing the drawing area, or NULL to set the viewport to the entire target.

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

This function should only be called on the main thread.

This function is available since SDL 3.2.0.

SDL_GetRenderViewport(3), SDL_RenderViewportSet(3)

SDL_GetRenderViewport(3), SDL_RenderCoordinatesToWindow(3), SDL_RenderViewportSet(3).