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.

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).