Add GLFW_CENTER_CURSOR

Adds a hint for controlling whether the cursor is centered over newly
created full screen windows.

Fixes #749.
Closes #842.

README.md

@@ -159,6 +159,7 @@ information on what to include when reporting a bug.
 - [Cocoa] Bugfix: Windows created after the first were not cascaded (#195)
 - [EGL] Added support for `EGL_KHR_get_all_proc_addresses` (#871)
 - [EGL] Bugfix: The test for `EGL_RGB_BUFFER` was invalid
+- Added 'GLFW_CENTER_CURSOR' window hint for controlling cursor centering
 
 
 ## Contact
@@ -307,6 +308,7 @@ skills.
  - Santi Zupancic
  - Jonas Ådahl
  - Lasse Öörni
+ - Liam Middlebrook
  - All the unmentioned and anonymous contributors in the GLFW community, for bug
    reports, patches, feedback, testing and encouragement
 

docs/window.dox

@@ -428,6 +428,7 @@ GLFW_FOCUSED                  | `GLFW_TRUE`                 | `GLFW_TRUE` or `GL
 GLFW_AUTO_ICONIFY             | `GLFW_TRUE`                 | `GLFW_TRUE` or `GLFW_FALSE`
 GLFW_FLOATING                 | `GLFW_FALSE`                | `GLFW_TRUE` or `GLFW_FALSE`
 GLFW_MAXIMIZED                | `GLFW_FALSE`                | `GLFW_TRUE` or `GLFW_FALSE`
+GLFW_CENTER_CURSOR            | `GLFW_TRUE`                 | `GLFW_TRUE` or `GLFW_FALSE`
 GLFW_RED_BITS                 | 8                           | 0 to `INT_MAX` or `GLFW_DONT_CARE`
 GLFW_GREEN_BITS               | 8                           | 0 to `INT_MAX` or `GLFW_DONT_CARE`
 GLFW_BLUE_BITS                | 8                           | 0 to `INT_MAX` or `GLFW_DONT_CARE`
@@ -1041,6 +1042,10 @@ __GLFW_MAXIMIZED__ indicates whether the specified window is maximized.  See
 __GLFW_VISIBLE__ indicates whether the specified window is visible.  See @ref
 window_hide for details.
 
+`GLFW_CENTER_CURSOR` indicates whether the cursor should be moved to the center
+of the full screen window during creation. This is ignored for windowed mode
+windows.
+
 @anchor GLFW_RESIZABLE_attrib
 __GLFW_RESIZABLE__ indicates whether the specified window is resizable _by the
 user_.  This can be set before creation with the

include/GLFW/glfw3.h

@@ -686,6 +686,7 @@ extern "C" {
  *  [window attribute](@ref GLFW_MAXIMIZED_attrib).
  */
 #define GLFW_MAXIMIZED              0x00020008
+#define GLFW_CENTER_CURSOR          0x00020009
 
 /*! @brief Framebuffer bit depth hint.
  *

src/cocoa_window.m

@@ -1096,7 +1096,8 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
         if (!acquireMonitor(window))
             return GLFW_FALSE;
 
-        centerCursor(window);
+    if (wndconfig->centerCursor)
+            centerCursor(window);
     }
 
     return GLFW_TRUE;

src/internal.h

@@ -277,6 +277,7 @@ struct _GLFWwndconfig
     GLFWbool      autoIconify;
     GLFWbool      floating;
     GLFWbool      maximized;
+    GLFWbool      centerCursor;
     struct {
         GLFWbool  retina;
         GLFWbool  frame;

src/win32_window.c

@@ -1037,7 +1037,10 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
         if (!acquireMonitor(window))
             return GLFW_FALSE;
 
-        centerCursor(window);
+        if (wndconfig->centerCursor)
+        {
+            centerCursor(window);
+        }
     }
 
     return GLFW_TRUE;

src/window.c

@@ -345,6 +345,9 @@ GLFWAPI void glfwWindowHint(int hint, int value)
         case GLFW_COCOA_FRAME_AUTOSAVE:
             _glfw.hints.window.ns.frame = value ? GLFW_TRUE : GLFW_FALSE;
             break;
+	case GLFW_CENTER_CURSOR:
+	    _glfw.hints.window.centerCursor = value ? GLFW_TRUE : GLFW_FALSE;
+	    break;
         case GLFW_CLIENT_API:
             _glfw.hints.context.client = value;
             break;

src/x11_window.c

@@ -1597,7 +1597,10 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
         if (!acquireMonitor(window))
             return GLFW_FALSE;
 
-        centerCursor(window);
+        if(wndconfig->centerCursor)
+        {
+            centerCursor(window);
+        }
     }
 
     XFlush(_glfw.x11.display);