1 files changed, 37 insertions, 0 deletions
diff --git a/src/libui_sdl/libui/windows/areautil.cpp b/src/libui_sdl/libui/windows/areautil.cpp
new file mode 100644
index 0000000..9dc72fb
--- /dev/null
+++ b/src/libui_sdl/libui/windows/areautil.cpp
@@ -0,0 +1,37 @@
+// 18 december 2015
+#include "uipriv_windows.hpp"
+#include "area.hpp"
+
+void loadAreaSize(uiArea *a, ID2D1RenderTarget *rt, double *width, double *height)
+{
+	D2D1_SIZE_F size;
+
+	*width = 0;
+	*height = 0;
+	if (!a->scrolling) {
+		if (rt == NULL)
+			rt = a->rt;
+		size = realGetSize(rt);
+		*width = size.width;
+		*height = size.height;
+	}
+}
+
+void pixelsToDIP(uiArea *a, double *x, double *y)
+{
+	FLOAT dpix, dpiy;
+
+	a->rt->GetDpi(&dpix, &dpiy);
+	// see https://msdn.microsoft.com/en-us/library/windows/desktop/dd756649%28v=vs.85%29.aspx (and others; search "direct2d mouse")
+	*x = (*x * 96) / dpix;
+	*y = (*y * 96) / dpiy;
+}
+
+void dipToPixels(uiArea *a, double *x, double *y)
+{
+	FLOAT dpix, dpiy;
+
+	a->rt->GetDpi(&dpix, &dpiy);
+	*x = (*x * dpix) / 96;
+	*y = (*y * dpiy) / 96;
+}