Auto redraw window possible in SDL-2? - c++

Question

Here is a minimal SDL-1.2 text output example (stripped from the lazyfoo tutorial for ttf):
#include <SDL.h>
#include <SDL_ttf.h>
#include <string>
SDL_Surface *message = NULL;
SDL_Surface *screen = NULL;
SDL_Event event;
TTF_Font *font = NULL;
SDL_Color color = { 255, 255, 255 };
int main( int argc, char* args[] )
{
SDL_Init( SDL_INIT_EVERYTHING );
screen = SDL_SetVideoMode( 640, 480, 32, SDL_SWSURFACE );
TTF_Init();
SDL_WM_SetCaption( "Test message", NULL );
font = TTF_OpenFont( "anyttffont.ttf", 20 );
message = TTF_RenderText_Solid(
font, "My test message", color );
SDL_Rect offset;
offset.x = 0;
offset.y = 150;
SDL_BlitSurface( message, NULL, screen, &offset );
SDL_Flip( screen );
bool quit = false;
while( quit == false )
while( SDL_PollEvent( &event ) )
if( event.type == SDL_QUIT )
quit = true;
SDL_FreeSurface( message );
TTF_CloseFont( font );
TTF_Quit();
SDL_Quit();
return 0;
}
The resulting executable redraws the window automatically after re-exposing it (after minimizing or obscuring).
Is it possible to do something like this in SDL-2?
I tried the equivalent tutorial from lazyfoo for SDL-2, but this has code to constantly re-render the text in the event loop. It stops re-drawing when the render code is moved in front of the loop. I also tried rewriting it using the window surface directly and then using SDL_UpdateWindowSurface(gWindow);, but this behaves the same way.