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test: Add flag to suspend drawing when occluded

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Add the flag "--suspend-when-occluded" to testgl, testgles2, and testsprite, which, when used, will suspend rendering and throttle the event loop when the occlusion flag is set on the window.
This commit is contained in:
Frank Praznik
2023-06-25 10:18:58 -04:00
parent 44536b7537
commit ef4ce8cec5
3 changed files with 97 additions and 18 deletions
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16
test/testgl.c
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@@ -31,6 +31,7 @@ typedef struct GL_Context
static SDLTest_CommonState *state;
static SDL_GLContext context;
static GL_Context ctx;
static SDL_bool suspend_when_occluded;
static int LoadContext(GL_Context *data)
{
@@ -237,12 +238,15 @@ int main(int argc, char *argv[])
} else if (SDL_strcasecmp(argv[i], "--accel") == 0 && i + 1 < argc) {
accel = SDL_atoi(argv[i + 1]);
consumed = 2;
} else if(SDL_strcasecmp(argv[i], "--suspend-when-occluded") == 0) {
suspend_when_occluded = SDL_TRUE;
consumed = 1;
} else {
consumed = -1;
}
}
if (consumed < 0) {
static const char *options[] = { "[--fsaa n]", "[--accel n]", NULL };
static const char *options[] = { "[--fsaa n]", "[--accel n]", "[--suspend-when-occluded]", NULL };
SDLTest_CommonLogUsage(state, argv[0], options);
quit(1);
}
@@ -386,6 +390,7 @@ int main(int argc, char *argv[])
done = 0;
while (!done) {
SDL_bool update_swap_interval = SDL_FALSE;
int active_windows = 0;
/* Check for events */
++frames;
@@ -408,9 +413,11 @@ int main(int argc, char *argv[])
for (i = 0; i < state->num_windows; ++i) {
int w, h;
if (state->windows[i] == NULL) {
if (state->windows[i] == NULL ||
(suspend_when_occluded && (SDL_GetWindowFlags(state->windows[i]) & SDL_WINDOW_OCCLUDED))) {
continue;
}
++active_windows;
SDL_GL_MakeCurrent(state->windows[i], context);
if (update_swap_interval) {
SDL_GL_SetSwapInterval(swap_interval);
@@ -420,6 +427,11 @@ int main(int argc, char *argv[])
Render();
SDL_GL_SwapWindow(state->windows[i]);
}
/* If all windows are occluded, throttle event polling to 15hz. */
if (!active_windows) {
SDL_DelayNS(SDL_NS_PER_SECOND / 15);
}
}
/* Print out some timing information */