From 7fe1da4e745e2e9ab38f208229e284982b439ca7 Mon Sep 17 00:00:00 2001
From: Vadim Grigoruk <grigoruk@gmail.com>
Date: Thu, 17 May 2018 21:53:42 +0300
Subject: [PATCH] no message

---
 CMakeLists.txt          | 19 +++++++++++--------
 examples/sdl-renderer.c | 16 +++++++++++++++-
 2 files changed, 26 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 58b5af1..87ddf1d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -131,8 +131,11 @@ target_include_directories(tic80lib PRIVATE 3rd-party/fennel)
 add_dependencies(tic80lib lua lpeg wren giflib)
 target_link_libraries(tic80lib lua lpeg wren giflib)
 
+if(WIN32)
+	set(HAVE_LIBC TRUE)
+endif()
+
 set(SDL_STATIC ON)
-set(HAVE_LIBC TRUE)
 add_subdirectory(3rd-party/SDL2-2.0.7)
 
 set(EXAMPLE_DIR examples)
@@ -141,14 +144,14 @@ set(EXAMPLE_SRC
 )
 
 if(WIN32)
-	add_executable(example WIN32 ${EXAMPLE_SRC})
+	add_executable(sdl-renderer WIN32 ${EXAMPLE_SRC})
 else()
-	add_executable(example ${EXAMPLE_SRC})
+	add_executable(sdl-renderer ${EXAMPLE_SRC})
 endif()
 
-target_include_directories(example PRIVATE 3rd-party/SDL2-2.0.7/include)
-target_include_directories(example PRIVATE include)
-target_include_directories(example PRIVATE src)
+target_include_directories(sdl-renderer PRIVATE 3rd-party/SDL2-2.0.7/include)
+target_include_directories(sdl-renderer PRIVATE include)
+target_include_directories(sdl-renderer PRIVATE src)
 
-add_dependencies(example tic80lib SDL2-static SDL2main)
-target_link_libraries(example tic80lib SDL2-static SDL2main)
+add_dependencies(sdl-renderer tic80lib SDL2-static SDL2main)
+target_link_libraries(sdl-renderer tic80lib SDL2-static SDL2main)
diff --git a/examples/sdl-renderer.c b/examples/sdl-renderer.c
index c4ad533..a0d6562 100644
--- a/examples/sdl-renderer.c
+++ b/examples/sdl-renderer.c
@@ -60,7 +60,7 @@ int main(int argc, char **argv)
 
 			{
 				SDL_Window* window = SDL_CreateWindow("TIC-80 SDL demo", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, TIC80_FULLWIDTH, TIC80_FULLHEIGHT, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE);
-				SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);// TODO: disable vsync
+				SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
 				SDL_Texture* texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STREAMING, TIC80_FULLWIDTH, TIC80_FULLHEIGHT);
 				
 				SDL_AudioDeviceID audioDevice = 0;
@@ -99,6 +99,9 @@ int main(int argc, char **argv)
 				
 				if(tic)
 				{
+					u64 nextTick = SDL_GetPerformanceCounter();
+					const u64 Delta = SDL_GetPerformanceFrequency() / TIC_FRAMERATE;
+
 					while(!state.quit)
 					{
 						SDL_Event event;
@@ -139,6 +142,8 @@ int main(int argc, char **argv)
 							}
 						}
 
+						nextTick += Delta;
+
 						tic80_tick(tic, input);
 
 						if (!audioStarted && audioDevice)
@@ -172,6 +177,15 @@ int main(int argc, char **argv)
 						}
 
 						SDL_RenderPresent(renderer);
+
+						{
+							s64 delay = nextTick - SDL_GetPerformanceCounter();
+
+							if (delay < 0) 
+								nextTick -= delay;
+							else SDL_Delay((u32)(delay * 1000 / SDL_GetPerformanceFrequency()));
+						}
+
 					}
 
 					tic80_delete(tic);