From a11cbb458f69a5d03c5a51832cab1ca86b3ba7b4 Mon Sep 17 00:00:00 2001
From: Andrew Alderwick <andrew@alderwick.co.uk>
Date: Fri, 11 Jun 2021 09:18:52 +0100
Subject: [PATCH] Added screenshot functionality, contributed by badd10de,
 thank you!

---
 .gitignore   |  3 ++-
 src/uxnemu.c | 16 +++++++++++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index 7f7ecce..04b83fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,5 @@
 /bin
 *io.bit
 *.bak
-/*-test
\ No newline at end of file
+/*-test
+/screenshot.bmp
diff --git a/src/uxnemu.c b/src/uxnemu.c
index d2b8b48..7746ce8 100644
--- a/src/uxnemu.c
+++ b/src/uxnemu.c
@@ -84,6 +84,18 @@ togglezoom(Uxn *u)
 	redraw(u);
 }
 
+void
+save_screenshot(void)
+{
+	const Uint32 format = SDL_PIXELFORMAT_ARGB8888;
+	SDL_Surface *surface = SDL_CreateRGBSurfaceWithFormat(0, (ppu.width + PAD * 2) * zoom, (ppu.height + PAD * 2) * zoom, 32, format);
+	SDL_LockSurface(surface);
+	SDL_RenderReadPixels(gRenderer, NULL, format, surface->pixels, surface->pitch);
+	SDL_UnlockSurface(surface);
+	SDL_SaveBMP(surface, "screenshot.bmp");
+	SDL_FreeSurface(surface);
+}
+
 void
 quit(void)
 {
@@ -178,7 +190,9 @@ doctrl(Uxn *u, SDL_Event *event, int z)
 			toggledebug(u);
 		if(SDL_GetModState() & KMOD_LALT)
 			togglezoom(u);
-	}
+	} else if(z && event->key.keysym.sym == SDLK_s)
+		if(SDL_GetModState() & KMOD_LCTRL)
+			save_screenshot();
 	switch(event->key.keysym.sym) {
 	case SDLK_LCTRL: flag = 0x01; break;
 	case SDLK_LALT: flag = 0x02; break;