ebiten/internal/devicescale/impl_mac.go

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// Copyright 2018 The Ebiten Authors
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//
// 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.
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// +build darwin
// +build !js
// +build !ios
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package devicescale
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// #cgo CFLAGS: -x objective-c
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// #cgo LDFLAGS: -framework AppKit
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//
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// #import <AppKit/AppKit.h>
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//
// static float scaleAt(int x, int y) {
// // On macOS, the direction of Y axis is inverted from GLFW monitors (#807).
// y = -y;
//
// NSArray<NSScreen*>* screens = [NSScreen screens];
// for (NSScreen* screen in screens) {
// if (NSPointInRect(NSMakePoint(x, y), [screen frame])) {
// return [screen backingScaleFactor];
// }
// }
// return 0;
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// }
import "C"
func impl(x, y int) float64 {
return float64(C.scaleAt(C.int(x), C.int(y)))
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}