ebiten/internal/ui/ui_windows.go

// Copyright 2016 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// +build !js

package ui

// #cgo LDFLAGS: -lgdi32
//
// #include <windows.h>
//
// static int getDPI() {
//   HDC dc = GetWindowDC(0);
//   return GetDeviceCaps(dc, LOGPIXELSX);
// }
import "C"

func deviceScale() float64 {
	dpi := int(C.getDPI())
	return float64(dpi) / 96
}

func glfwScale() float64 {
	return deviceScale()
}