mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-25 03:08:54 +01:00
54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
// Copyright 2019 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.
|
|
|
|
package jsutil
|
|
|
|
import (
|
|
"reflect"
|
|
"runtime"
|
|
"syscall/js"
|
|
"unsafe"
|
|
)
|
|
|
|
func copyUint8SliceToTemporaryArrayBuffer(src []uint8) {
|
|
if len(src) == 0 {
|
|
return
|
|
}
|
|
js.CopyBytesToJS(temporaryUint8Array, src)
|
|
}
|
|
|
|
func copyUint16SliceToTemporaryArrayBuffer(src []uint16) {
|
|
if len(src) == 0 {
|
|
return
|
|
}
|
|
h := (*reflect.SliceHeader)(unsafe.Pointer(&src))
|
|
h.Len *= 2
|
|
h.Cap *= 2
|
|
bs := *(*[]byte)(unsafe.Pointer(h))
|
|
runtime.KeepAlive(src)
|
|
js.CopyBytesToJS(temporaryUint8Array, bs)
|
|
}
|
|
|
|
func copyFloat32SliceToTemporaryArrayBuffer(src []float32) {
|
|
if len(src) == 0 {
|
|
return
|
|
}
|
|
h := (*reflect.SliceHeader)(unsafe.Pointer(&src))
|
|
h.Len *= 4
|
|
h.Cap *= 4
|
|
bs := *(*[]byte)(unsafe.Pointer(h))
|
|
runtime.KeepAlive(src)
|
|
js.CopyBytesToJS(temporaryUint8Array, bs)
|
|
}
|