From 645875a240db7336e9d10fa756d2ae16b7788bae Mon Sep 17 00:00:00 2001
From: omar <omarcornut@gmail.com>
Date: Sun, 23 Jul 2017 16:13:17 +0800
Subject: [PATCH] Examples: Enable vsync by default in example applications
 (#1213, #1151)

---
 examples/directx10_example/main.cpp | 4 +++-
 examples/directx11_example/main.cpp | 4 +++-
 examples/directx9_example/main.cpp  | 3 ++-
 examples/opengl2_example/main.cpp   | 1 +
 examples/opengl3_example/main.cpp   | 1 +
 5 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/examples/directx10_example/main.cpp b/examples/directx10_example/main.cpp
index fb98cad1..a7b282da 100644
--- a/examples/directx10_example/main.cpp
+++ b/examples/directx10_example/main.cpp
@@ -183,7 +183,9 @@ int main(int, char**)
         // Rendering
         g_pd3dDevice->ClearRenderTargetView(g_mainRenderTargetView, (float*)&clear_col);
         ImGui::Render();
-        g_pSwapChain->Present(0, 0);
+
+        g_pSwapChain->Present(1, 0); // Present with vsync
+        //g_pSwapChain->Present(0, 0); // Present without vsync
     }
 
     ImGui_ImplDX10_Shutdown();
diff --git a/examples/directx11_example/main.cpp b/examples/directx11_example/main.cpp
index e3fe5aa7..9e85d9e7 100644
--- a/examples/directx11_example/main.cpp
+++ b/examples/directx11_example/main.cpp
@@ -186,7 +186,9 @@ int main(int, char**)
         // Rendering
         g_pd3dDeviceContext->ClearRenderTargetView(g_mainRenderTargetView, (float*)&clear_col);
         ImGui::Render();
-        g_pSwapChain->Present(0, 0);
+
+        g_pSwapChain->Present(1, 0); // Present with vsync
+        //g_pSwapChain->Present(0, 0); // Present without vsync
     }
 
     ImGui_ImplDX11_Shutdown();
diff --git a/examples/directx9_example/main.cpp b/examples/directx9_example/main.cpp
index babee5fd..ecc382a7 100644
--- a/examples/directx9_example/main.cpp
+++ b/examples/directx9_example/main.cpp
@@ -63,7 +63,8 @@ int main(int, char**)
     g_d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
     g_d3dpp.EnableAutoDepthStencil = TRUE;
     g_d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
-    g_d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;
+    g_d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_ONE; // Present with vsync
+    //g_d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE; // Present without vsync, maximum unthrottled framerate
 
     // Create the D3DDevice
     if (pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &g_d3dpp, &g_pd3dDevice) < 0)
diff --git a/examples/opengl2_example/main.cpp b/examples/opengl2_example/main.cpp
index b6007149..28cb90ff 100644
--- a/examples/opengl2_example/main.cpp
+++ b/examples/opengl2_example/main.cpp
@@ -19,6 +19,7 @@ int main(int, char**)
         return 1;
     GLFWwindow* window = glfwCreateWindow(1280, 720, "ImGui OpenGL2 example", NULL, NULL);
     glfwMakeContextCurrent(window);
+    glfwSwapInterval(1); // Enable vsync
 
     // Setup ImGui binding
     ImGui_ImplGlfw_Init(window, true);
diff --git a/examples/opengl3_example/main.cpp b/examples/opengl3_example/main.cpp
index 074bab54..a1c45a53 100644
--- a/examples/opengl3_example/main.cpp
+++ b/examples/opengl3_example/main.cpp
@@ -26,6 +26,7 @@ int main(int, char**)
 #endif
     GLFWwindow* window = glfwCreateWindow(1280, 720, "ImGui OpenGL3 example", NULL, NULL);
     glfwMakeContextCurrent(window);
+    glfwSwapInterval(1); // Enable vsync
     gl3wInit();
 
     // Setup ImGui binding