Fixed print screen key input for all platforms.

README.md

@@ -471,6 +471,7 @@ skills.
  * Riku Salminen
  * Sebastian Schuberth
  * Matt Sealey
+ * SephiRok
  * Steve Sexton
  * Dmitri Shuralyov
  * Daniel Skorupski

src/cocoa_window.m

@@ -257,7 +257,7 @@ static int convertMacKeyCode(unsigned int macKeyCode)
         /* 66 */ -1,
         /* 67 */ GLFW_KEY_F11,
         /* 68 */ -1,
-        /* 69 */ GLFW_KEY_F13,
+        /* 69 */ GLFW_KEY_PRINT_SCREEN,
         /* 6a */ GLFW_KEY_F16,
         /* 6b */ GLFW_KEY_F14,
         /* 6c */ -1,

src/win32_window.c

@@ -214,6 +214,7 @@ static int translateKey(WPARAM wParam, LPARAM lParam)
         case VK_F24:           return GLFW_KEY_F24;
         case VK_NUMLOCK:       return GLFW_KEY_NUM_LOCK;
         case VK_CAPITAL:       return GLFW_KEY_CAPS_LOCK;
+        case VK_SNAPSHOT:      return GLFW_KEY_PRINT_SCREEN;
         case VK_SCROLL:        return GLFW_KEY_SCROLL_LOCK;
         case VK_PAUSE:         return GLFW_KEY_PAUSE;
         case VK_LWIN:          return GLFW_KEY_LEFT_SUPER;
@@ -413,12 +414,18 @@ static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg,
         case WM_KEYUP:
         case WM_SYSKEYUP:
         {
-            // Special trick: release both shift keys on SHIFT up event
             if (wParam == VK_SHIFT)
             {
+                // Special trick: release both shift keys on SHIFT up event
                 _glfwInputKey(window, GLFW_KEY_LEFT_SHIFT, GLFW_RELEASE);
                 _glfwInputKey(window, GLFW_KEY_RIGHT_SHIFT, GLFW_RELEASE);
             }
+            else if (wParam == VK_SNAPSHOT)
+            {
+                // Key down is not reported for the print screen key
+                _glfwInputKey(window, GLFW_KEY_PRINT_SCREEN, GLFW_PRESS);
+                _glfwInputKey(window, GLFW_KEY_PRINT_SCREEN, GLFW_RELEASE);
+            }
             else
                 _glfwInputKey(window, translateKey(wParam, lParam), GLFW_RELEASE);
 

src/x11_init.c

@@ -92,6 +92,7 @@ static int keyCodeToGLFWKeyCode(int keyCode)
         case XK_Menu:           return GLFW_KEY_MENU;
         case XK_Num_Lock:       return GLFW_KEY_NUM_LOCK;
         case XK_Caps_Lock:      return GLFW_KEY_CAPS_LOCK;
+        case XK_Print:          return GLFW_KEY_PRINT_SCREEN;
         case XK_Scroll_Lock:    return GLFW_KEY_SCROLL_LOCK;
         case XK_Pause:          return GLFW_KEY_PAUSE;
         case XK_Delete:         return GLFW_KEY_DELETE;

tests/events.c

@@ -163,6 +163,7 @@ static const char* get_key_name(int key)
         case GLFW_KEY_KP_DECIMAL:   return "KEYPAD DECIMAL";
         case GLFW_KEY_KP_EQUAL:     return "KEYPAD EQUAL";
         case GLFW_KEY_KP_ENTER:     return "KEYPAD ENTER";
+        case GLFW_KEY_PRINT_SCREEN: return "PRINT SCREEN";
         case GLFW_KEY_NUM_LOCK:     return "NUM LOCK";
         case GLFW_KEY_CAPS_LOCK:    return "CAPS LOCK";
         case GLFW_KEY_SCROLL_LOCK:  return "SCROLL LOCK";