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October 27, 2018 21:45
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Minimal code to show window in SDL2. Note that you need to call SDL_PollEvent to let the window rendered on screen.
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#include <SDL2/SDL.h> | |
#include <stdio.h> | |
SDL_Window *window = NULL; | |
SDL_Renderer *renderer = NULL; | |
int main(int argc, char* argv[]) | |
{ | |
if (SDL_Init(SDL_INIT_VIDEO) < 0) { | |
SDL_Log("failed to init: %s", SDL_GetError()); | |
return -1; | |
} | |
window = SDL_CreateWindow( | |
"Hello", 0, 0, 640, 480, | |
SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL | |
); | |
if (window == NULL) { | |
SDL_Log("Failed to create window: %s", SDL_GetError()); | |
return -1; | |
} | |
renderer = SDL_CreateRenderer(window, -1, 0); | |
if (renderer == NULL) | |
{ | |
SDL_Log("Failed to create renderer: %s", SDL_GetError()); | |
return -1; | |
} | |
SDL_bool quit = SDL_FALSE; | |
while (!quit) | |
{ | |
SDL_Event e; | |
// we need to call SDL_PollEvent to let window rendered, otherwise | |
// no window will be shown | |
while (SDL_PollEvent(&e) != 0) | |
{ | |
if (e.type == SDL_QUIT) | |
{ | |
quit = SDL_TRUE; | |
} | |
} | |
} | |
// free | |
if (renderer != NULL) | |
{ | |
SDL_DestroyRenderer(renderer); | |
renderer = NULL; | |
} | |
if (window != NULL) | |
{ | |
SDL_DestroyWindow(window); | |
window = NULL; | |
} | |
SDL_Quit(); | |
return 0; | |
} |
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