ebiten/internal/devicescale/impl_js.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 js
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package devicescale
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import (
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"github.com/hajimehoshi/gopherwasm/js"
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)
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func impl() float64 {
ratio := js.Global.Get("window").Get("devicePixelRatio").Float()
if ratio == 0 {
ratio = 1
}
return ratio
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}