From f28130787c656468f8c5703896db0dd12cfabd4b Mon Sep 17 00:00:00 2001
From: erysdren <contact@erysdren.me>
Date: Sun, 13 Oct 2024 10:22:39 -0500
Subject: [PATCH] sdl3: screenshot functionality

---
 platform/sdl3/main.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/platform/sdl3/main.c b/platform/sdl3/main.c
index 136a6a5..e545066 100644
--- a/platform/sdl3/main.c
+++ b/platform/sdl3/main.c
@@ -24,6 +24,8 @@ static Sint64 now = 0, then = 0;
 
 static int requested_map = -1;
 
+static int screenshot_idx = 0;
+
 static void die(const char *fmt, ...)
 {
 	static char error[1024];
@@ -145,6 +147,19 @@ SDL_AppResult SDL_AppIterate(void *appstate)
 	return SDL_APP_CONTINUE;
 }
 
+static bool file_exists(const char *filename)
+{
+	SDL_IOStream *io = SDL_IOFromFile(filename, "rb");
+
+	if (io)
+	{
+		SDL_CloseIO(io);
+		return true;
+	}
+
+	return false;
+}
+
 SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 {
 	switch (event->type)
@@ -158,6 +173,15 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 				focused = !focused;
 				SDL_SetWindowRelativeMouseMode(window, focused);
 			}
+			else if (event->key.scancode == SDL_SCANCODE_F12)
+			{
+				char filename[256];
+				SDL_snprintf(filename, sizeof(filename), "yeti%03d.bmp", screenshot_idx++);
+				while (file_exists(filename))
+					SDL_snprintf(filename, sizeof(filename), "yeti%03d.bmp", screenshot_idx++);
+				SDL_SaveBMP(back, filename);
+				SDL_Log("Saved screenshot %s", filename);
+			}
 			break;
 
 		case SDL_EVENT_MOUSE_MOTION: