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testgl2: Press 'o' or 'p' to decrease/increase OpenGL swap interval.

This commit is contained in:
Ryan C. Gordon 2018-12-16 01:04:07 -05:00
parent 13869f194c
commit c3e3503ee8
1 changed files with 25 additions and 1 deletions
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26
test/testgl2.c
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@ -218,6 +218,7 @@ main(int argc, char *argv[])
Uint32 then, now, frames; Uint32 then, now, frames;
int status; int status;
int dw, dh; int dw, dh;
int swap_interval = 0;
/* Enable standard application logging */ /* Enable standard application logging */
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
@ -289,11 +290,15 @@ main(int argc, char *argv[])
if (state->render_flags & SDL_RENDERER_PRESENTVSYNC) { if (state->render_flags & SDL_RENDERER_PRESENTVSYNC) {
/* try late-swap-tearing first. If not supported, try normal vsync. */ /* try late-swap-tearing first. If not supported, try normal vsync. */
if (SDL_GL_SetSwapInterval(-1) == -1) { if (SDL_GL_SetSwapInterval(-1) == 0) {
swap_interval = -1;
} else {
SDL_GL_SetSwapInterval(1); SDL_GL_SetSwapInterval(1);
swap_interval = 1;
} }
} else { } else {
SDL_GL_SetSwapInterval(0); /* disable vsync. */ SDL_GL_SetSwapInterval(0); /* disable vsync. */
swap_interval = 0;
} }
SDL_GetCurrentDisplayMode(0, &mode); SDL_GetCurrentDisplayMode(0, &mode);
@ -377,16 +382,35 @@ main(int argc, char *argv[])
then = SDL_GetTicks(); then = SDL_GetTicks();
done = 0; done = 0;
while (!done) { while (!done) {
SDL_bool update_swap_interval = SDL_FALSE;
/* Check for events */ /* Check for events */
++frames; ++frames;
while (SDL_PollEvent(&event)) { while (SDL_PollEvent(&event)) {
SDLTest_CommonEvent(state, &event, &done); SDLTest_CommonEvent(state, &event, &done);
if (event.type == SDL_KEYDOWN) {
if (event.key.keysym.sym == SDLK_o) {
swap_interval--;
update_swap_interval = SDL_TRUE;
} else if (event.key.keysym.sym == SDLK_p) {
swap_interval++;
update_swap_interval = SDL_TRUE;
}
}
} }
if (update_swap_interval) {
SDL_Log("Swap interval to be set to %d\n", swap_interval);
}
for (i = 0; i < state->num_windows; ++i) { for (i = 0; i < state->num_windows; ++i) {
int w, h; int w, h;
if (state->windows[i] == NULL) if (state->windows[i] == NULL)
continue; continue;
SDL_GL_MakeCurrent(state->windows[i], context); SDL_GL_MakeCurrent(state->windows[i], context);
if (update_swap_interval) {
SDL_GL_SetSwapInterval(swap_interval);
}
SDL_GL_GetDrawableSize(state->windows[i], &w, &h); SDL_GL_GetDrawableSize(state->windows[i], &w, &h);
ctx.glViewport(0, 0, w, h); ctx.glViewport(0, 0, w, h);
Render(); Render();