mirror of
https://github.com/hajimehoshi/ebiten.git
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99 lines
2.6 KiB
Go
99 lines
2.6 KiB
Go
// Copyright 2022 The Ebitengine 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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//go:build !nintendosdk
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package ui
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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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_SM_CYCAPTION = 4
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_MONITOR_DEFAULTTONEAREST = 2
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)
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type _RECT struct {
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left int32
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top int32
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right int32
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bottom int32
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}
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type _MONITORINFO struct {
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cbSize uint32
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rcMonitor _RECT
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rcWork _RECT
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dwFlags uint32
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}
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type _POINT struct {
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x int32
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y int32
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}
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var (
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user32 = windows.NewLazySystemDLL("user32.dll")
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procGetSystemMetrics = user32.NewProc("GetSystemMetrics")
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procMonitorFromWindow = user32.NewProc("MonitorFromWindow")
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procGetMonitorInfoW = user32.NewProc("GetMonitorInfoW")
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procGetCursorPos = user32.NewProc("GetCursorPos")
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)
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func _GetSystemMetrics(nIndex int) (int32, error) {
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r, _, _ := procGetSystemMetrics.Call(uintptr(nIndex))
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if int32(r) == 0 {
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// GetLastError doesn't provide an extended information.
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// See https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getsystemmetrics
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return 0, fmt.Errorf("ui: GetSystemMetrics returned 0")
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}
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return int32(r), nil
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}
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func _MonitorFromWindow(hwnd windows.HWND, dwFlags uint32) uintptr {
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r, _, _ := procMonitorFromWindow.Call(uintptr(hwnd), uintptr(dwFlags))
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return r
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}
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func _GetMonitorInfoW(hMonitor uintptr) (_MONITORINFO, error) {
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mi := _MONITORINFO{}
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mi.cbSize = uint32(unsafe.Sizeof(mi))
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r, _, e := procGetMonitorInfoW.Call(hMonitor, uintptr(unsafe.Pointer(&mi)))
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if int32(r) == 0 {
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if e != nil && e != windows.ERROR_SUCCESS {
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return _MONITORINFO{}, fmt.Errorf("ui: GetMonitorInfoW failed: error code: %w", e)
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}
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return _MONITORINFO{}, fmt.Errorf("ui: GetMonitorInfoW failed: returned 0")
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}
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return mi, nil
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}
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func _GetCursorPos() (int32, int32, error) {
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var pt _POINT
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r, _, e := procGetCursorPos.Call(uintptr(unsafe.Pointer(&pt)))
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if int32(r) == 0 {
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if e != nil && e != windows.ERROR_SUCCESS {
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return 0, 0, fmt.Errorf("ui: GetCursorPos failed: error code: %w", e)
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}
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return 0, 0, fmt.Errorf("ui: GetCursorPos failed: returned 0")
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}
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return pt.x, pt.y, nil
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}
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