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| import log from 'electron-log'
const ffi = require('ffi-napi')
const ref = require('ref-napi') // 对接C++指针
const refStruct = require('ref-struct-napi') // 对接C++结构体
const refArray = require('ref-array-napi') // 对接C++数组
// 屏幕的四种模式
export const sdcApplay = 0x80 // 屏幕设置辅助参数
export enum DisplayMode {
internal = 1, // 仅电脑屏
clone = 2, // 复制
extend = 4, // 扩展
external = 8, // 仅第二屏幕
}
// 这两个结构体的内容太复杂，而且实际项目用不到，所以直接算一下结构体的大小填充个无用数据
const DISPLAYCONFIG_PATH_INFO = refStruct({
unuse: refArray(ref.types.int, 72 / 4),
})
const DISPLAYCONFIG_MODE_INFO = refStruct({
unuse: refArray(ref.types.int, 64 / 4),
})
const PathArrayType = refArray(ref.refType(DISPLAYCONFIG_PATH_INFO))
const ModeArrayType = refArray(ref.refType(DISPLAYCONFIG_MODE_INFO))
const libm = ffi.Library('user32', {
SetDisplayConfig: ['long', ['int', 'pointer', 'int', 'pointer', 'int']],
GetDisplayConfigBufferSizes: [
'long',
['int', ref.refType(ref.types.int), ref.refType(ref.types.int)],
],
QueryDisplayConfig: [
'long',
[
'int',
ref.refType(ref.types.int),
PathArrayType,
ref.refType(ref.types.int),
ModeArrayType,
ref.refType(ref.types.int),
],
],
})
export default {
setDisplayMode: (mode: DisplayMode) => {
log.info(
'=====================================================================setDisplayMode',
mode,
)
// eslint-disable-next-line no-bitwise
const re = libm.SetDisplayConfig(0, null, 0, null, sdcApplay | mode)
return re
},
getDisplayMode: () => {
const requiredPaths = ref.alloc(ref.types.int)
const requiredModes = ref.alloc(ref.types.int)
// 获取QueryDisplayConfig的2-5参数，不用动
const result2 = libm.GetDisplayConfigBufferSizes(
2,
requiredPaths,
requiredModes,
)
log.info(result2, requiredPaths.deref(), requiredModes.deref())
const PathArray = refArray(DISPLAYCONFIG_PATH_INFO, requiredPaths.deref())
const ModeAyyay = refArray(DISPLAYCONFIG_MODE_INFO, requiredModes.deref())
const paths = new PathArray()
const modes = new ModeAyyay()
// 查询结果存储在flags
log.info('new flags')
const flags1 = ref.alloc(ref.types.int)
// 2到5参数没有用到，参数1是常量
log.info('start get')
libm.QueryDisplayConfig(
4,
requiredPaths,
paths.ref(),
requiredModes,
modes.ref(),
flags1,
)
// log.info('save re')
// const re = flags1.deref()
log.info(
'=====================================================================getDisplayMode',
flags1.deref(),
)
return flags1.deref()
},
}
|