ebiten/internal/ui/hideconsole_windows.go

80 lines
2.2 KiB
Go

// Copyright 2017 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.
//go:build !ebitencbackend
// +build !ebitencbackend
package ui
import (
"fmt"
"unsafe"
"golang.org/x/sys/windows"
)
const (
processQueryLimitedInformation = 0x1000
)
var (
kernel32 = windows.NewLazySystemDLL("kernel32.dll")
user32 = windows.NewLazySystemDLL("user32.dll")
procFreeConsoleWindow = kernel32.NewProc("FreeConsole")
procGetCurrentProcessId = kernel32.NewProc("GetCurrentProcessId")
procGetConsoleWindow = kernel32.NewProc("GetConsoleWindow")
procGetWindowThreadProcessId = user32.NewProc("GetWindowThreadProcessId")
)
func freeConsole() error {
r, _, e := procFreeConsoleWindow.Call()
if int32(r) == 0 {
if e != nil && e != windows.ERROR_SUCCESS {
return fmt.Errorf("ui: FreeConsole failed: %w", e)
}
return fmt.Errorf("ui: FreeConsole returned 0")
}
return nil
}
func getCurrentProcessId() uint32 {
r, _, _ := procGetCurrentProcessId.Call()
return uint32(r)
}
func getConsoleWindow() windows.HWND {
r, _, _ := procGetConsoleWindow.Call()
return windows.HWND(r)
}
func getWindowThreadProcessId(hwnd windows.HWND) (tid, pid uint32) {
r, _, _ := procGetWindowThreadProcessId.Call(uintptr(hwnd), uintptr(unsafe.Pointer(&pid)))
tid = uint32(r)
return
}
// hideConsoleWindowOnWindows will hide the console window that is showing when
// compiling on Windows without specifying the '-ldflags "-Hwindowsgui"' flag.
func hideConsoleWindowOnWindows() {
pid := getCurrentProcessId()
// Get the process ID of the console's creator.
_, cpid := getWindowThreadProcessId(getConsoleWindow())
if pid == cpid {
// The current process created its own console. Hide this.
// Ignore error.
freeConsole()
}
}