From 78c767b69352c8103738adac7159914bad666d31 Mon Sep 17 00:00:00 2001
From: Madhav Kanbur <abcdjdj@gmail.com>
Date: Wed, 21 Nov 2018 11:11:02 +0530
Subject: [PATCH] Add option to limit framerate from UI

Signed-off-by: Madhav Kanbur <abcdjdj@gmail.com>
---
 src/Config.cpp         |  4 ++++
 src/Config.h           |  2 ++
 src/libui_sdl/main.cpp | 13 +++++++++++--
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/Config.cpp b/src/Config.cpp
index fea92e9a..9b8f148b 100644
--- a/src/Config.cpp
+++ b/src/Config.cpp
@@ -47,6 +47,8 @@ int ScreenLayout;
 int ScreenSizing;
 int ScreenFilter;
 
+int LimitFPS;
+
 int DirectBoot;
 
 int Threaded3D;
@@ -103,6 +105,8 @@ ConfigEntry ConfigFile[] =
     {"ScreenSizing",   0, &ScreenSizing,   0, NULL, 0},
     {"ScreenFilter",   0, &ScreenFilter,   1, NULL, 0},
 
+    {"LimitFPS", 0, &LimitFPS, 1, NULL, 0},
+
     {"DirectBoot", 0, &DirectBoot, 1, NULL, 0},
 
     {"Threaded3D", 0, &Threaded3D, 1, NULL, 0},
diff --git a/src/Config.h b/src/Config.h
index d7b0858c..cea051f7 100644
--- a/src/Config.h
+++ b/src/Config.h
@@ -40,6 +40,8 @@ extern int ScreenLayout;
 extern int ScreenSizing;
 extern int ScreenFilter;
 
+extern int LimitFPS;
+
 extern int DirectBoot;
 
 extern int Threaded3D;
diff --git a/src/libui_sdl/main.cpp b/src/libui_sdl/main.cpp
index 9ca829ec..880ffa38 100644
--- a/src/libui_sdl/main.cpp
+++ b/src/libui_sdl/main.cpp
@@ -216,7 +216,6 @@ int EmuThreadFunc(void* burp)
     u32 lasttick = starttick;
     u32 lastmeasuretick = lasttick;
     u32 fpslimitcount = 0;
-    bool limitfps = true;
     char melontitle[100];
 
     while (EmuRunning != 0)
@@ -306,7 +305,7 @@ int EmuThreadFunc(void* burp)
             lasttick = curtick;
 
             u32 wantedtick = starttick + (u32)((float)fpslimitcount * framerate);
-            if (curtick < wantedtick && limitfps)
+            if (curtick < wantedtick && Config::LimitFPS)
             {
                 SDL_Delay(wantedtick - curtick);
             }
@@ -1299,6 +1298,12 @@ void OnSetScreenFiltering(uiMenuItem* item, uiWindow* window, void* blarg)
     else          Config::ScreenFilter = 0;
 }
 
+void OnSetLimitFPS(uiMenuItem* item, uiWindow* window, void* blarg)
+{
+    int chk = uiMenuItemChecked(item);
+    if (chk != 0) Config::LimitFPS = true;
+    else          Config::LimitFPS = false;
+}
 
 void ApplyNewSettings()
 {
@@ -1509,6 +1514,10 @@ int main(int argc, char** argv)
     uiMenuItemOnClicked(menuitem, OnSetScreenFiltering, NULL);
     uiMenuItemSetChecked(menuitem, Config::ScreenFilter==1);
 
+    menuitem = uiMenuAppendCheckItem(menu, "Limit framerate");
+    uiMenuItemOnClicked(menuitem, OnSetLimitFPS, NULL);
+    uiMenuItemSetChecked(menuitem, Config::LimitFPS==1);
+
 
     int w = Config::WindowWidth;
     int h = Config::WindowHeight;