Updated Win32 implementation of gamma ramp API.

src/win32/platform.h

@@ -270,7 +270,6 @@ typedef struct _GLFWlibraryWin32
     ATOM      classAtom;       // Window class atom
     HHOOK     keyboardHook;    // Keyboard hook handle
     DWORD     foregroundLockTimeout;
-    HDC       desktopDC;
 
     // Default monitor
     struct {

src/win32/win32_gamma.c

@@ -41,14 +41,9 @@
 // Save the gamma ramp to our internal copy
 //========================================================================
 
-void _glfwPlatformSaveGammaRamp(int ramp)
+void _glfwPlatformGetGammaRamp(GLFWgammaramp* ramp)
 {
-    if (!_glfwLibrary.gammaSize)
-    {
-        return;
-    }
-    _glfw_GetDeviceGammaRamp(_glfwLibrary.Win32.desktopDC,
-                             _glfwLibrary.gammaRamp[ramp]);
+    _glfw_GetDeviceGammaRamp(GetDC(GetDesktopWindow()), (WORD*) ramp);
 }
 
 
@@ -56,12 +51,8 @@ void _glfwPlatformSaveGammaRamp(int ramp)
 // Restore the gamma ramp to our internal copy of the gamma ramp
 //========================================================================
 
-void _glfwPlatformRestoreGammaRamp(int ramp)
+void _glfwPlatformSetGammaRamp(const GLFWgammaramp* ramp)
 {
-    if (!_glfwLibrary.gammaSize)
-    {
-        return;
-    }
-    _glfw_SetDeviceGammaRamp(_glfwLibrary.Win32.desktopDC,
-                             _glfwLibrary.gammaRamp[ramp]);
+    _glfw_SetDeviceGammaRamp(GetDC(GetDesktopWindow()), (WORD*) ramp);
 }
+

src/win32/win32_init.c

@@ -160,18 +160,9 @@ int _glfwPlatformInit(void)
 
     _glfwLibrary.Win32.instance = GetModuleHandle(NULL);
 
-    // Initialise the internal gamma ramp
-    _glfwLibrary.gammaSize = 256;
-    _glfwLibrary.gammaRamp[GLFW_GAMMA_ORIG] =
-        malloc(256 * sizeof(unsigned short) * 3);
-    _glfwLibrary.gammaRamp[GLFW_GAMMA_CURR] =
-        malloc(256 * sizeof(unsigned short) * 3);
-
-    // Get the desktop DC
-    _glfwLibrary.Win32.desktopDC = GetDC(GetDesktopWindow());
-
     // Save the original gamma ramp
-    _glfwPlatformSaveGammaRamp(GLFW_GAMMA_ORIG);
+    _glfwLibrary.originalRampSize = 256;
+    _glfwPlatformGetGammaRamp(&_glfwLibrary.originalRamp);
 
     _glfwInitTimer();
 
@@ -186,11 +177,7 @@ int _glfwPlatformInit(void)
 int _glfwPlatformTerminate(void)
 {
     // Restore the original gamma ramp
-    _glfwPlatformRestoreGammaRamp(GLFW_GAMMA_ORIG);
-
-    // Free the gamma ramps
-    free(_glfwLibrary.gammaRamp[GLFW_GAMMA_ORIG]);
-    free(_glfwLibrary.gammaRamp[GLFW_GAMMA_CURR]);
+    _glfwPlatformSetGammaRamp(&_glfwLibrary.originalRamp);
 
     if (_glfwLibrary.Win32.classAtom)
     {