mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-14 15:07:26 +01:00
96 lines
2.7 KiB
Go
96 lines
2.7 KiB
Go
// Copyright 2017 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package glfw
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import (
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"fmt"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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const (
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processQueryLimitedInformation = 0x1000
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)
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var (
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kernel32 = windows.NewLazySystemDLL("kernel32.dll")
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user32 = windows.NewLazySystemDLL("user32.dll")
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getCurrentProcessIdProc = kernel32.NewProc("GetCurrentProcessId")
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getConsoleWindowProc = kernel32.NewProc("GetConsoleWindow")
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getWindowThreadProcessIdProc = user32.NewProc("GetWindowThreadProcessId")
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showWindowAsyncProc = user32.NewProc("ShowWindowAsync")
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)
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func getCurrentProcessId() (uint32, error) {
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r, _, e := getCurrentProcessIdProc.Call()
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if e != nil && e.(windows.Errno) != 0 {
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return 0, fmt.Errorf("ui: GetCurrentProcessId failed: %d", e)
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}
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return uint32(r), nil
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}
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func getWindowThreadProcessId(hwnd uintptr) (uint32, error) {
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pid := uint32(0)
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r, _, e := getWindowThreadProcessIdProc.Call(hwnd, uintptr(unsafe.Pointer(&pid)))
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if r == 0 {
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return 0, fmt.Errorf("ui: GetWindowThreadProcessId failed: %d", e)
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}
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return pid, nil
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}
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func getConsoleWindow() (uintptr, error) {
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r, _, e := getConsoleWindowProc.Call()
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if e != nil && e.(windows.Errno) != 0 {
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return 0, fmt.Errorf("ui: GetConsoleWindow failed: %d", e)
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}
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return r, nil
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}
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func showWindowAsync(hwnd uintptr, show int) error {
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if _, _, e := showWindowAsyncProc.Call(hwnd, uintptr(show)); e != nil && e.(windows.Errno) != 0 {
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return fmt.Errorf("ui: ShowWindowAsync failed: %d", e)
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}
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return nil
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}
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// hideConsoleWindowOnWindows will hide the console window that is showing when
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// compiling on Windows without specifying the '-ldflags "-Hwindowsgui"' flag.
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func hideConsoleWindowOnWindows() {
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pid, err := getCurrentProcessId()
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if err != nil {
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// Ignore errors because:
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// 1. It is not critical if the console can't be hid.
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// 2. There is nothing to do when errors happen.
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return
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}
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w, err := getConsoleWindow()
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if err != nil {
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// Ignore errors
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return
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}
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// Get the process ID of the console's creator.
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cpid, err := getWindowThreadProcessId(w)
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if err != nil {
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// Ignore errors
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return
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}
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if pid == cpid {
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// The current process created its own console. Hide this.
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showWindowAsync(w, windows.SW_HIDE)
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}
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}
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