From 84377c6175e566607255002a32827f843270517d Mon Sep 17 00:00:00 2001
From: Camilla Berglund <elmindreda@elmindreda.org>
Date: Mon, 10 Feb 2014 13:45:13 +0100
Subject: [PATCH] Added _GLFW_USE_RETINA.

---
 CMakeLists.txt       | 5 +++++
 README.md            | 2 ++
 docs/compile.dox     | 5 +++++
 src/cocoa_init.m     | 3 +++
 src/cocoa_window.m   | 2 ++
 src/glfw_config.h.in | 2 ++
 6 files changed, 19 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dcc7c59d..60f23022 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,6 +26,7 @@ if (APPLE)
     option(GLFW_BUILD_UNIVERSAL "Build GLFW as a Universal Binary" OFF)
     option(GLFW_USE_CHDIR "Make glfwInit chdir to Contents/Resources" ON)
     option(GLFW_USE_MENUBAR "Populate the menu bar on first window creation" ON)
+    option(GLFW_USE_RETINA "Use the full resolution of Retina displays" ON)
 else()
     option(GLFW_USE_EGL "Use EGL for context creation" OFF)
 endif()
@@ -340,6 +341,10 @@ if (_GLFW_COCOA AND _GLFW_NSGL)
         set(_GLFW_USE_CHDIR 1)
     endif()
 
+    if (GLFW_USE_RETINA)
+        set(_GLFW_USE_RETINA 1)
+    endif()
+
     if (GLFW_BUILD_UNIVERSAL)
         message(STATUS "Building GLFW as Universal Binaries")
         set(CMAKE_OSX_ARCHITECTURES i386;x86_64)
diff --git a/README.md b/README.md
index 5fc1194e..c41e0aec 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,8 @@ The following dependencies are needed by the examples and test programs:
 
  - Added native monitor handle access to native API
  - Added `glfwSetDropCallback` and `GLFWdropfun` for receiving dropped files
+ - [Cocoa] Added `_GLFW_USE_RETINA` to control whether windows will use the full
+           resolution on Retina displays
  - [Cocoa] Bugfix: Using a 1x1 cursor for hidden mode caused some screen
                    recorders to fail
  - [Win32] Bugfix: Failure to load winmm or its functions was not reported to
diff --git a/docs/compile.dox b/docs/compile.dox
index ef6c3b93..dee7bd9c 100644
--- a/docs/compile.dox
+++ b/docs/compile.dox
@@ -165,6 +165,9 @@ directory of bundled applications to the `Contents/Resources` directory.
 `GLFW_USE_MENUBAR` determines whether the first call to
 `glfwCreateWindow` sets up a minimal menu bar.
 
+`GLFW_USE_RETINA` determines whether windows will use the full resolution of
+Retina displays.
+
 `GLFW_BUILD_UNIVERSAL` determines whether to build Universal Binaries.
 
 
@@ -257,5 +260,7 @@ available:
    application bundle during @ref glfwInit (recommended)
  - `_GLFW_USE_MENUBAR` to create and populate the menu bar when the first window
    is created (recommended)
+ - `_GLFW_USE_RETINA` to have windows use the full resolution of Retina displays
+   (recommended)
 
 */
diff --git a/src/cocoa_init.m b/src/cocoa_init.m
index b6050632..afb1a542 100644
--- a/src/cocoa_init.m
+++ b/src/cocoa_init.m
@@ -132,6 +132,9 @@ const char* _glfwPlatformGetVersionString(void)
 #if defined(_GLFW_USE_MENUBAR)
         " menubar"
 #endif
+#if defined(_GLFW_USE_RETINA)
+        " retina"
+#endif
 #if defined(_GLFW_BUILD_DLL)
         " dynamic"
 #endif
diff --git a/src/cocoa_window.m b/src/cocoa_window.m
index 6e24fe78..b0f59e90 100644
--- a/src/cocoa_window.m
+++ b/src/cocoa_window.m
@@ -940,7 +940,9 @@ static GLboolean createWindow(_GLFWwindow* window,
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
     if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_6)
     {
+#if defined(_GLFW_USE_RETINA)
         [window->ns.view setWantsBestResolutionOpenGLSurface:YES];
+#endif
 
         if (wndconfig->resizable)
             [window->ns.object setCollectionBehavior:NSWindowCollectionBehaviorFullScreenPrimary];
diff --git a/src/glfw_config.h.in b/src/glfw_config.h.in
index a7318602..e4953245 100644
--- a/src/glfw_config.h.in
+++ b/src/glfw_config.h.in
@@ -73,6 +73,8 @@
 #cmakedefine _GLFW_USE_CHDIR
 // Define this to 1 if glfwCreateWindow should populate the menu bar
 #cmakedefine _GLFW_USE_MENUBAR
+// Define this to 1 if windows should use full resolution on Retina displays
+#cmakedefine _GLFW_USE_MENUBAR
 
 // Define this to 1 if using OpenGL as the client library
 #cmakedefine _GLFW_USE_OPENGL