1 files changed, 36 insertions, 0 deletions
diff --git a/src/win/native/dpi_util.hpp b/src/win/native/dpi_util.hpp
new file mode 100644
index 00000000..d459e8c6
--- /dev/null
+++ b/src/win/native/dpi_util.hpp
@@ -0,0 +1,36 @@
+#pragma once
+
+#include "cru/platform/native/basic_types.hpp"
+
+// The dpi awareness needs to be implemented in the future. Currently we use 96
+// as default.
+
+namespace cru::win::native {
+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);
+}
+}  // namespace cru::win::native