Examples: Fix crash/high CPU usage when minimized

examples/DeferredShading/main.cpp

@@ -7,8 +7,10 @@
 #include <NZSL/FieldOffsets.hpp>
 #include <NZSL/Parser.hpp>
 #include <array>
+#include <chrono>
 #include <iostream>
 #include <random>
+#include <thread>
 
 NAZARA_REQUEST_DEDICATED_GPU()
 
@@ -1176,7 +1178,10 @@ int main()
 
 		Nz::RenderFrame frame = window.AcquireFrame();
 		if (!frame)
+		{
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
 			continue;
+		}
 
 		currentFrame = &frame;
 

examples/GraphicsTest/main.cpp

@@ -6,7 +6,9 @@
 #include <NZSL/SpirvPrinter.hpp>
 #include <Nazara/Utility.hpp>
 #include <array>
+#include <chrono>
 #include <iostream>
+#include <thread>
 
 int main()
 {
@@ -215,7 +217,10 @@ int main()
 
 		Nz::RenderFrame frame = window.AcquireFrame();
 		if (!frame)
+		{
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
 			continue;
+		}
 
 		viewerInstance.UpdateViewMatrix(Nz::Matrix4f::TransformInverse(viewerPos, camAngles));
 		viewerInstance.UpdateEyePosition(viewerPos);

examples/Physics2DDemo/main.cpp

@@ -16,8 +16,10 @@
 #include <Nazara/Widgets.hpp>
 #include <entt/entt.hpp>
 #include <array>
+#include <chrono>
 #include <iostream>
 #include <limits>
+#include <thread>
 
 NAZARA_REQUEST_DEDICATED_GPU()
 
@@ -169,7 +171,10 @@ int main()
 
 		Nz::RenderFrame frame = window.AcquireFrame();
 		if (!frame)
+		{
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
 			continue;
+		}
 
 		renderSystem.Render(registry, frame);
 

examples/PhysicsDemo/main.cpp

@@ -15,8 +15,10 @@
 #include <Nazara/Utility/Components.hpp>
 #include <entt/entt.hpp>
 #include <array>
+#include <chrono>
 #include <iostream>
 #include <limits>
+#include <thread>
 
 NAZARA_REQUEST_DEDICATED_GPU()
 
@@ -360,7 +362,10 @@ int main()
 
 		Nz::RenderFrame frame = window.AcquireFrame();
 		if (!frame)
+		{
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
 			continue;
+		}
 
 		renderSystem.Render(registry, frame);
 

examples/RenderTest/main.cpp

@@ -8,7 +8,9 @@
 #include <NZSL/Ast/SanitizeVisitor.hpp>
 #include <Nazara/Utility.hpp>
 #include <array>
+#include <chrono>
 #include <iostream>
+#include <thread>
 
 NAZARA_REQUEST_DEDICATED_GPU()
 
@@ -322,7 +324,10 @@ int main()
 
 		Nz::RenderFrame frame = window.AcquireFrame();
 		if (!frame)
+		{
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
 			continue;
+		}
 
 		ubo.viewMatrix = Nz::Matrix4f::TransformInverse(viewerPos, camAngles);
 

examples/Tut01/main.cpp

@@ -7,7 +7,9 @@
 #include <Nazara/Utility.hpp>
 #include <Nazara/Utility/Components.hpp>
 #include <entt/entt.hpp>
+#include <chrono>
 #include <iostream>
+#include <thread>
 
 int main()
 {
@@ -62,6 +64,12 @@ int main()
 		mainWindow.ProcessEvents();
 
 		Nz::RenderFrame renderFrame = mainWindow.AcquireFrame();
+		if (!renderFrame)
+		{
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
+			continue;
+		}
+
 		renderSystem.Render(registry, renderFrame);
 
 		renderFrame.Present();

examples/Tut02/main.cpp

@@ -7,7 +7,9 @@
 #include <Nazara/Utility.hpp>
 #include <Nazara/Utility/Components.hpp>
 #include <entt/entt.hpp>
+#include <chrono>
 #include <iostream>
+#include <thread>
 
 int main()
 {
@@ -79,6 +81,12 @@ int main()
 		mainWindow.ProcessEvents();
 
 		Nz::RenderFrame renderFrame = mainWindow.AcquireFrame();
+		if (!renderFrame)
+		{
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
+			continue;
+		}
+		
 		renderSystem.Render(registry, renderFrame);
 
 		renderFrame.Present();