New gamma ramp API.

src/internal.h

@@ -250,7 +250,7 @@ struct _GLFWmonitor
     int             modeCount;
 
     GLFWgammaramp   originalRamp;
-    GLboolean       rampChanged;
+    GLFWgammaramp   currentRamp;
 
     // This is defined in the window API's platform.h
     _GLFW_PLATFORM_MONITOR_STATE;
@@ -716,6 +716,14 @@ GLboolean _glfwIsValidContextConfig(_GLFWwndconfig* wndconfig);
  */
 GLboolean _glfwIsValidContext(_GLFWwndconfig* wndconfig);
 
+/*! @ingroup utility
+ */
+void _glfwAllocGammaRamp(GLFWgammaramp* ramp, unsigned int size);
+
+/*! @ingroup utility
+ */
+void _glfwFreeGammaRamp(GLFWgammaramp* ramp);
+
 /*! @ingroup utility
  */
 _GLFWmonitor* _glfwCreateMonitor(const char* name, int widthMM, int heightMM);