ebiten/internal/ui/ui_windows.go

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// 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 char* getDPI(int* dpi) {
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// HDC dc = GetWindowDC(0);
// *dpi = GetDeviceCaps(dc, LOGPIXELSX);
// if (!ReleaseDC(0, dc)) {
// return "ReleaseDC failed";
// }
// return "";
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// }
import "C"
func deviceScale() float64 {
dpi := C.int(0)
if errmsg := C.GoString(C.getDPI(&dpi)); errmsg != "" {
panic(errmsg)
}
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return float64(dpi) / 96
}
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func glfwScale() float64 {
return deviceScale()
}