Do not render anything when window is minimized

Author: ryuukk

engine/system/win/sys_local.h

@@ -60,6 +60,7 @@ class sys_main_c: public sys_IMain {
 	class core_IMain* core = nullptr;
 
 	bool	initialised = false;
+	bool	minimized = false;
 	volatile bool	exitFlag = false;
 	volatile bool	restartFlag = false;
 	char*	exitMsg = nullptr;

engine/system/win/sys_main.cpp

@@ -804,8 +804,8 @@ bool sys_main_c::Run(int argc, char** argv)
 				Exit();
 				break;
 			}
-
-			core->Frame();
+			if (minimized == false)
+				core->Frame();
 
 			if (threadError) {
 				Error(threadError);

engine/system/win/sys_video.cpp

@@ -426,6 +426,10 @@ int sys_video_c::Apply(sys_vidSet_s* set)
 			auto sys = (sys_main_c*)glfwGetWindowUserPointer(wnd);
 			glfwSetWindowShouldClose(wnd, sys->initialised && sys->core->CanExit());
 			});
+		glfwSetWindowIconifyCallback(wnd, [](GLFWwindow* wnd, int value) {
+			auto sys = (sys_main_c*)glfwGetWindowUserPointer(wnd);
+			sys->minimized = value == 1 ? true : false;
+			});
 		glfwSetFramebufferSizeCallback(wnd, [](GLFWwindow* wnd, int width, int height) {
 			auto sys = (sys_main_c*)glfwGetWindowUserPointer(wnd);
 			sys->video->FramebufferSizeChanged(width, height);