Initial commit

Display.cpp

@@ -0,0 +1,43 @@
+#include "Display.h"
+#include "Exception.h"
+
+
+Display::Display()
+{
+    _devmode.dmSize = sizeof(DEVMODE);
+
+    BOOL success = EnumDisplaySettingsEx(
+        nullptr,
+        ENUM_CURRENT_SETTINGS,
+        &_devmode,
+        0
+    );
+
+    if (!success)
+        throw SystemException(GetLastError());
+}
+
+
+void Display::rotate(Rotation rot)
+{
+    DWORD& orient = _devmode.dmDisplayOrientation;
+    DWORD& width = _devmode.dmPelsWidth;
+    DWORD& height = _devmode.dmPelsHeight;
+
+    if (orient == DMDO_90 || orient == DMDO_270)
+        std::swap(width, height);
+
+    orient = (DWORD)rot;
+
+    if (orient == DMDO_90 || orient == DMDO_270)
+        std::swap(width, height);
+}
+
+
+void Display::apply()
+{
+    LONG res = ChangeDisplaySettingsEx(nullptr, &_devmode, nullptr, CDS_RESET, nullptr);
+
+    if (res != DISP_CHANGE_SUCCESSFUL)
+        throw DisplayException(res);
+}