ebiten/math.go
2016-10-25 01:56:59 +09:00

46 lines
1.1 KiB
Go

// Copyright 2016 The Ebiten Authors
//
// 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 ebiten
import (
"unsafe"
"github.com/hajimehoshi/ebiten/internal/endian"
)
func floatBytes(xs ...float64) []uint8 {
bits := make([]uint8, 0, len(xs)*4)
for _, x := range xs {
x32 := float32(x)
n := *(*uint32)(unsafe.Pointer(&x32))
if endian.IsLittle() {
bits = append(bits,
uint8(n),
uint8(n>>8),
uint8(n>>16),
uint8(n>>24))
} else {
bits = append(bits,
uint8(n>>24),
uint8(n>>16),
uint8(n>>8),
uint8(n))
}
}
return bits
}