phantasia

commit 804d1b2c51e6396f7345e0d7991e8886ad94958d
parent b292695f902ff484649298fa947d97398df25c69
Author: beep <beep@wimdupont.com>
Date:   Sat,  4 Apr 2026 16:31:04 +0000

Add SDL render smoke test mode

Diffstat:
M
Makefile
 | 
5
++++-
M
README.adoc
 | 
7
+++++++
M
src/game/main.c
 | 
12
++++++++++--

3 files changed, 21 insertions(+), 3 deletions(-)
diff --git a/Makefile b/Makefile
@@ -23,7 +23,7 @@ else
 CPPFLAGS += -DPH_USE_SDL=0
 endif
 
-.PHONY: all clean smoke
+.PHONY: all clean render-smoke smoke
 
 all: $(BIN)
 
@@ -38,6 +38,9 @@ $(OBJDIR)/%.o: src/%.c
 smoke: $(BIN)
 	$(BIN) --smoke-test
 
+render-smoke: $(BIN)
+	SDL_VIDEODRIVER=dummy $(BIN) --render-smoke-test
+
 clean:
 	rm -rf $(BIN) $(OBJDIR)
 
diff --git a/README.adoc b/README.adoc
@@ -24,6 +24,13 @@ If SDL3 is not installed, this still builds a headless logic binary that can run
 make smoke
 ----
 
+To exercise the SDL renderer in a headless environment:
+
+[source,sh]
+----
+make render-smoke
+----
+
 With SDL3 available, run the game normally:
 
 [source,sh]
diff --git a/src/game/main.c b/src/game/main.c
@@ -236,12 +236,13 @@ ph_read_input(const bool *keys)
 }
 
 static int
-ph_run_game(void)
+ph_run_game(int frame_limit)
 {
 	SDL_Window *window;
 	SDL_Renderer *renderer;
 	PhWorld world = ph_make_world();
 	Uint64 last_ticks;
+	int frame_count = 0;
 	int running = 1;
 
 	if (!SDL_Init(SDL_INIT_VIDEO)) {
@@ -294,6 +295,10 @@ ph_run_game(void)
 		ph_draw_items(renderer, &world);
 		ph_draw_entities(renderer, &world);
 		SDL_RenderPresent(renderer);
+		++frame_count;
+		if (frame_limit > 0 && frame_count >= frame_limit) {
+			running = 0;
+		}
 		SDL_Delay(16);
 	}
 
@@ -312,7 +317,10 @@ main(int argc, char **argv)
 	}
 
 #if PH_USE_SDL
-	return ph_run_game();
+	if (argc > 1 && strcmp(argv[1], "--render-smoke-test") == 0) {
+		return ph_run_game(8);
+	}
+	return ph_run_game(0);
 #else
 	fprintf(stderr, "SDL3 not available in this build; run `%s --smoke-test`\n", argv[0]);
 	return 1;