Windows: Initial/minimum window size vs. UI scale factor

1 files changed, 17 insertions, 0 deletions

diff --git a/src/win32.c b/src/win32.c
index 36043b53..5eb2a0d5 100644
--- a/src/win32.c
+++ b/src/win32.c
@@ -25,11 +25,28 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
 

 #define WIN32_LEAN_AND_MEAN

 #include <Windows.h>

+#include <d2d1.h>

 

 void setDPIAware_Win32(void) {

     SetProcessDPIAware();

 }

 

+float desktopDPI_Win32(void) {

+    /* Query Direct2D for the desktop DPI (not aware of which monitor, though). */

+    float ratio = 1.0f;

+    ID2D1Factory *d2dFactory = NULL;

+    HRESULT hr = D2D1CreateFactory(

+        D2D1_FACTORY_TYPE_SINGLE_THREADED, &IID_ID2D1Factory, NULL, (void **) &d2dFactory);

+    if (SUCCEEDED(hr)) {

+        FLOAT dpiX = 96;

+        FLOAT dpiY = 96;

+        ID2D1Factory_GetDesktopDpi(d2dFactory, &dpiX, &dpiY);

+        ratio = (float) (dpiX / 96.0);

+        ID2D1Factory_Release(d2dFactory);

+    }

+    return ratio;

+}

+

 void useExecutableIconResource_SDLWindow(SDL_Window *win) {

     HINSTANCE handle = GetModuleHandle(NULL);

     HICON icon = LoadIcon(handle, "IDI_ICON1");