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SDL Wiki

SDL_RenderPresent

Update the screen with any rendering performed since the previous call.

Syntax

void SDL_RenderPresent(SDL_Renderer * renderer);

Function Parameters

renderer

the rendering context

Remarks

SDL's rendering functions operate on a backbuffer; that is, calling a rendering function such as SDL_RenderDrawLine() does not directly put a line on the screen, but rather updates the backbuffer. As such, you compose your entire scene and present the composed backbuffer to the screen as a complete picture.

Therefore, when using SDL's rendering API, one does all drawing intended for the frame, and then calls this function once per frame to present the final drawing to the user.

The backbuffer should be considered invalidated after each present; do not assume that previous contents will exist between frames. You are strongly encouraged to call SDL_RenderClear() to initialize the backbuffer before starting each new frame's drawing, even if you plan to overwrite every pixel.

Version

This function is available since SDL 2.0.0.

Code Examples

<<Include(SDL_RenderClear, , , from="== Code Examples ==", to="== Remarks ==")>>

SDL_RenderClear
SDL_RenderDrawLine
SDL_RenderDrawLines
SDL_RenderDrawPoint
SDL_RenderDrawPoints
SDL_RenderDrawRect
SDL_RenderDrawRects
SDL_RenderFillRect
SDL_RenderFillRects
SDL_SetRenderDrawBlendMode
SDL_SetRenderDrawColor

CategoryAPI, CategoryRender


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