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1 files changed, 32 insertions, 0 deletions

diff --git a/include/cru/platform/dpi_util.hpp b/include/cru/platform/dpi_util.hpp
new file mode 100644
index 00000000..3c0ae6ca
--- /dev/null
+++ b/include/cru/platform/dpi_util.hpp
@@ -0,0 +1,32 @@
+#pragma once
+#include "ui_applicaition.hpp"
+
+namespace cru::platform {
+inline Dpi GetDpi() {
+  return UiApplication::GetInstance()->GetDpi();
+}
+
+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::platform