SDL Wiki
(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)

SDL_GL_SwapWindow

Update a window with OpenGL rendering.

Syntax

void SDL_GL_SwapWindow(SDL_Window * window);

Function Parameters

window

the window to change

Remarks

This is used with double-buffered OpenGL contexts, which are the default.

On macOS, make sure you bind 0 to the draw framebuffer before swapping the window, otherwise nothing will happen. If you aren't using glBindFramebuffer(), this is the default and you won't have to do anything extra.

Version

This function is available since SDL 3.0.0.

Code Examples


SDL_Window* window = SDL_CreateWindow("SDL2/OpenGL Demo", 30, 30, 640, 480, SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE);
      
/* Create an OpenGL context associated with the window. */
SDL_GLContext glcontext = SDL_GL_CreateContext(window);

/* This makes our buffer swap syncronized with the monitor's vertical refresh */
SDL_GL_SetSwapInterval(1);

/* Clear context */
glClearColor(0,0,0,1);
glClear(GL_COLOR_BUFFER_BIT);

/* <Extra drawing functions here> */ 

/* Swap our buffer to display the current contents of buffer on screen */ 
SDL_GL_SwapWindow(window);

CategoryAPI, CategoryVideo


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