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1 files changed, 46 insertions, 0 deletions

diff --git a/src/win/native/DpiUtil.hpp b/src/win/native/DpiUtil.hpp
new file mode 100644
index 00000000..16ffda25
--- /dev/null
+++ b/src/win/native/DpiUtil.hpp
@@ -0,0 +1,46 @@
+#pragma once
+#include "cru/platform/native/Base.hpp"
+
+// The dpi awareness needs to be implemented in the future. Currently we use 96
+// as default.
+
+namespace cru::platform::native::win {
+inline platform::native::Dpi GetDpi() {
+  return platform::native::Dpi{96.0f, 96.0f};
+}
+
+inline int DipToPixelInternal(const float dip, const float dpi) {
+  return static_cast<int>(dip * dpi / 96.0f);
+}
+
+inline int DipToPixelX(const float dip_x) {
+  return DipToPixelInternal(dip_x, GetDpi().x);
+}
+
+inline int DipToPixelY(const float dip_y) {
+  return DipToPixelInternal(dip_y, GetDpi().y);
+}
+
+inline float DipToPixelInternal(const int pixel, const float dpi) {
+  return static_cast<float>(pixel) * 96.0f / dpi;
+}
+
+inline float PixelToDipX(const int pixel_x) {
+  return DipToPixelInternal(pixel_x, GetDpi().x);
+}
+
+inline float PixelToDipY(const int pixel_y) {
+  return DipToPixelInternal(pixel_y, GetDpi().y);
+}
+
+inline Point PiToDip(const POINT& pi_point) {
+  return Point(PixelToDipX(pi_point.x), PixelToDipY(pi_point.y));
+}
+
+inline POINT DipToPi(const Point& dip_point) {
+  POINT result;
+  result.x = DipToPixelX(dip_point.x);
+  result.y = DipToPixelY(dip_point.y);
+  return result;
+}
+}  // namespace cru::platform::native::win