diff --git a/Makefile b/Makefile index 4241b9a..3e08734 100644 --- a/Makefile +++ b/Makefile @@ -6,11 +6,14 @@ all: install install: cd draw2d && make install cd postscript && make install + cd wingui && make install clean: cd draw2d && make clean cd postscript && make clean + cd wingui && make clean nuke: cd draw2d && make nuke cd postscript && make nuke + cd wingui && make nuke diff --git a/cmd/Makefile b/cmd/Makefile index 6c456a3..1d2f034 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -1,7 +1,7 @@ include $(GOROOT)/src/Make.inc -TARG=gettingStarted testdraw2d testX11draw testandroid testgopher testimage testpostscript +TARG=gettingStarted testdraw2d testX11draw testandroid testgopher testimage testpostscript testWalkDraw OFILES=$(TARG:%=%.$O) diff --git a/cmd/testWalkDraw.go b/cmd/testWalkDraw.go new file mode 100644 index 0000000..d809d90 --- /dev/null +++ b/cmd/testWalkDraw.go @@ -0,0 +1,228 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package main + +import ( + "fmt" + "syscall" + "os" + "unsafe" + "image" + "io/ioutil" + "strings" + "draw2d.googlecode.com/hg/draw2d" + "draw2d.googlecode.com/hg/postscript" + "draw2d.googlecode.com/hg/wingui" +) + +// some help functions + +func abortf(format string, a ...interface{}) { + fmt.Fprintf(os.Stdout, format, a...) + os.Exit(1) +} + +func abortErrNo(funcname string, err int) { + abortf("%s failed: %d %s\n", funcname, err, syscall.Errstr(err)) +} + +// global vars + + +func TestDrawCubicCurve(gc draw2d.GraphicContext) { + // draw a cubic curve + x, y := 25.6, 128.0 + x1, y1 := 102.4, 230.4 + x2, y2 := 153.6, 25.6 + x3, y3 := 230.4, 128.0 + + gc.SetFillColor(image.NRGBAColor{0xAA, 0xAA, 0xAA, 0xFF}) + gc.SetLineWidth(10) + gc.MoveTo(x, y) + gc.CubicCurveTo(x1, y1, x2, y2, x3, y3) + gc.Stroke() + + gc.SetStrokeColor(image.NRGBAColor{0xFF, 0x33, 0x33, 0x88}) + + gc.SetLineWidth(6) + // draw segment of curve + gc.MoveTo(x, y) + gc.LineTo(x1, y1) + gc.LineTo(x2, y2) + gc.LineTo(x3, y3) + gc.Stroke() +} + +var ( + mh uint32 + wndBufferHeader uint32 + wndBuffer wingui.BITMAP + hdcWndBuffer uint32 + ppvBits *image.RGBAColor + backBuffer *image.RGBA + postscriptContent string +) + +// WinProc called by windows to notify us of all windows events we might be interested in. +func WndProc(hwnd, msg uint32, wparam, lparam int32) uintptr { + var rc int32 + + switch msg { + case wingui.WM_CREATE: + hdc := wingui.GetDC(hwnd); + wndBufferHeader = wingui.CreateCompatibleBitmap(hdc, 600, 800) + wingui.GetObject(wndBufferHeader, unsafe.Sizeof(wndBuffer), uintptr(unsafe.Pointer(&wndBuffer))) + hdcWndBuffer = wingui.CreateCompatibleDC(hdc) + wingui.SelectObject(hdcWndBuffer, wndBufferHeader) + + var bmp_header wingui.BITMAPINFOHEADER + bmp_header.Size = uint32(unsafe.Sizeof(bmp_header)) + bmp_header.Width = 600 + bmp_header.Height = 800 + bmp_header.SizeImage = 0// the api says this must be 0 for BI_RGB images + bmp_header.Compression = wingui.BI_RGB + bmp_header.BitCount = 32 + bmp_header.Planes = 1 + bmp_header.XPelsPerMeter = 0 + bmp_header.YPelsPerMeter = 0 + bmp_header.ClrUsed = 0 + bmp_header.ClrImportant = 0 + //bitmap info + var bmpinfo wingui.BITMAPINFO + bmpinfo.Colors[0].Blue = 0 + bmpinfo.Colors[0].Green = 0 + bmpinfo.Colors[0].Red = 0 + bmpinfo.Colors[0].Reserved = 0 + bmpinfo.Header = bmp_header + wndBufferHeader = wingui.CreateDIBSection(hdc, &bmpinfo, wingui.DIB_RGB_COLORS, uintptr(unsafe.Pointer(&ppvBits)), 0, 0) + wingui.GetObject(wndBufferHeader, unsafe.Sizeof(wndBufferHeader), uintptr(unsafe.Pointer(&wndBuffer))) + hdcWndBuffer = wingui.CreateCompatibleDC(hdc) + wingui.SelectObject(hdcWndBuffer, wndBufferHeader) + + pixel := (*[600*800]image.RGBAColor)(unsafe.Pointer(ppvBits)) + pixelSlice := pixel[:] + backBuffer = &image.RGBA{pixelSlice, 600, image.Rect(0, 0, 600, 800)} + fmt.Println("Create windows") + rc = wingui.DefWindowProc(hwnd, msg, wparam, lparam) + case wingui.WM_COMMAND: + switch uint32(lparam) { + default: + rc = wingui.DefWindowProc(hwnd, msg, wparam, lparam) + } + case wingui.WM_PAINT: + var ps wingui.PAINTSTRUCT + hdc := wingui.BeginPaint(hwnd, &ps) + gc := draw2d.NewImageGraphicContext(backBuffer) + gc.SetFillColor(image.RGBAColor{0xFF, 0xFF, 0xFF, 0xFF}) + gc.Clear() + gc.Save() + //gc.Translate(0, -380) + interpreter := postscript.NewInterpreter(gc) + reader := strings.NewReader(postscriptContent) + interpreter.Execute(reader) + gc.Restore() + wingui.BitBlt(hdc, 0, 0 , int(wndBuffer.Width), int(wndBuffer.Height), hdcWndBuffer, 0, 0, wingui.SRCCOPY); + wingui.EndPaint(hwnd, &ps) + rc = wingui.DefWindowProc(hwnd, msg, wparam, lparam) + case wingui.WM_CLOSE: + wingui.DestroyWindow(hwnd) + case wingui.WM_DESTROY: + wingui.PostQuitMessage(0) + default: + rc = wingui.DefWindowProc(hwnd, msg, wparam, lparam) + } + return uintptr(rc) +} + +func rungui() int { + var e int + + // GetModuleHandle + mh, e = wingui.GetModuleHandle(nil) + if e != 0 { + abortErrNo("GetModuleHandle", e) + } + + // Get icon we're going to use. + myicon, e := wingui.LoadIcon(0, wingui.IDI_APPLICATION) + if e != 0 { + abortErrNo("LoadIcon", e) + } + + // Get cursor we're going to use. + mycursor, e := wingui.LoadCursor(0, wingui.IDC_ARROW) + if e != 0 { + abortErrNo("LoadCursor", e) + } + + // Create callback + wproc := syscall.NewCallback(WndProc) + + // RegisterClassEx + wcname := syscall.StringToUTF16Ptr("Test Draw2d") + var wc wingui.Wndclassex + wc.Size = uint32(unsafe.Sizeof(wc)) + wc.WndProc = wproc + wc.Instance = mh + wc.Icon = myicon + wc.Cursor = mycursor + wc.Background = wingui.COLOR_BTNFACE + 1 + wc.MenuName = nil + wc.ClassName = wcname + wc.IconSm = myicon + if _, e := wingui.RegisterClassEx(&wc); e != 0 { + abortErrNo("RegisterClassEx", e) + } + + // CreateWindowEx + wh, e := wingui.CreateWindowEx( + wingui.WS_EX_CLIENTEDGE, + wcname, + syscall.StringToUTF16Ptr("My window"), + wingui.WS_OVERLAPPEDWINDOW, + wingui.CW_USEDEFAULT, wingui.CW_USEDEFAULT, 600, 800, + 0, 0, mh, 0) + if e != 0 { + abortErrNo("CreateWindowEx", e) + } + fmt.Printf("main window handle is %x\n", wh) + + // ShowWindow + wingui.ShowWindow(wh, wingui.SW_SHOWDEFAULT) + + // UpdateWindow + if e := wingui.UpdateWindow(wh); e != 0 { + abortErrNo("UpdateWindow", e) + } + + // Process all windows messages until WM_QUIT. + var m wingui.Msg + for { + r, e := wingui.GetMessage(&m, 0, 0, 0) + if e != 0 { + abortErrNo("GetMessage", e) + } + if r == 0 { + // WM_QUIT received -> get out + break + } + wingui.TranslateMessage(&m) + wingui.DispatchMessage(&m) + } + return int(m.Wparam) +} + +func main() { + src, err := os.Open("../resource/postscript/tiger.ps", 0, 0) + if err != nil { + fmt.Println("can't find postscript file.") + return + } + defer src.Close() + bytes, err := ioutil.ReadAll(src) + postscriptContent = string(bytes) + rc := rungui() + os.Exit(rc) +} diff --git a/wingui/Makefile b/wingui/Makefile new file mode 100644 index 0000000..9f58925 --- /dev/null +++ b/wingui/Makefile @@ -0,0 +1,10 @@ +include $(GOROOT)/src/Make.inc + +TARG=draw2d.googlecode.com/hg/wingui +GOFILES=\ + winapi.go\ + wingdi.go\ + zwinapi.go\ + + +include $(GOROOT)/src/Make.pkg diff --git a/wingui/winapi.go b/wingui/winapi.go new file mode 100644 index 0000000..2ae48d3 --- /dev/null +++ b/wingui/winapi.go @@ -0,0 +1,155 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +package wingui + +import ( + "syscall" + "unsafe" + "fmt" + "os" +) + + +func abortf(format string, a ...interface{}) { + fmt.Fprintf(os.Stdout, format, a...) + os.Exit(1) +} + +func loadDll(fname string) uint32 { + h, e := syscall.LoadLibrary(fname) + if e != 0 { + abortf("LoadLibrary(%s) failed with err=%d.\n", fname, e) + } + return h +} + +func getSysProcAddr(m uint32, pname string) uintptr { + p, e := syscall.GetProcAddress(m, pname) + if e != 0 { + abortf("GetProcAddress(%s) failed with err=%d.\n", pname, e) + } + return uintptr(p) +} + +type Wndclassex struct { + Size uint32 + Style uint32 + WndProc uintptr + ClsExtra int32 + WndExtra int32 + Instance uint32 + Icon uint32 + Cursor uint32 + Background uint32 + MenuName *uint16 + ClassName *uint16 + IconSm uint32 +} + +type Point struct { + X int32 + Y int32 +} + +type Msg struct { + Hwnd uint32 + Message uint32 + Wparam int32 + Lparam int32 + Time uint32 + Pt Point +} + +const ( + // Window styles + WS_OVERLAPPED = 0 + WS_POPUP = 0x80000000 + WS_CHILD = 0x40000000 + WS_MINIMIZE = 0x20000000 + WS_VISIBLE = 0x10000000 + WS_DISABLED = 0x8000000 + WS_CLIPSIBLINGS = 0x4000000 + WS_CLIPCHILDREN = 0x2000000 + WS_MAXIMIZE = 0x1000000 + WS_CAPTION = WS_BORDER | WS_DLGFRAME + WS_BORDER = 0x800000 + WS_DLGFRAME = 0x400000 + WS_VSCROLL = 0x200000 + WS_HSCROLL = 0x100000 + WS_SYSMENU = 0x80000 + WS_THICKFRAME = 0x40000 + WS_GROUP = 0x20000 + WS_TABSTOP = 0x10000 + WS_MINIMIZEBOX = 0x20000 + WS_MAXIMIZEBOX = 0x10000 + WS_TILED = WS_OVERLAPPED + WS_ICONIC = WS_MINIMIZE + WS_SIZEBOX = WS_THICKFRAME + // Common Window Styles + WS_OVERLAPPEDWINDOW = WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX + WS_TILEDWINDOW = WS_OVERLAPPEDWINDOW + WS_POPUPWINDOW = WS_POPUP | WS_BORDER | WS_SYSMENU + WS_CHILDWINDOW = WS_CHILD + + WS_EX_CLIENTEDGE = 0x200 + + // Some windows messages + WM_CREATE = 1 + WM_DESTROY = 2 + WM_CLOSE = 16 + WM_COMMAND = 273 + + // Some button control styles + BS_DEFPUSHBUTTON = 1 + + // Some colour constants + COLOR_WINDOW = 5 + COLOR_BTNFACE = 15 + + // Default window position + CW_USEDEFAULT = 0x80000000 - 0x100000000 + + // Show window default style + SW_SHOWDEFAULT = 10 +) + +var ( + // Some globaly known cusrors + IDC_ARROW = MakeIntResource(32512) + IDC_IBEAM = MakeIntResource(32513) + IDC_WAIT = MakeIntResource(32514) + IDC_CROSS = MakeIntResource(32515) + + // Some globaly known icons + IDI_APPLICATION = MakeIntResource(32512) + IDI_HAND = MakeIntResource(32513) + IDI_QUESTION = MakeIntResource(32514) + IDI_EXCLAMATION = MakeIntResource(32515) + IDI_ASTERISK = MakeIntResource(32516) + IDI_WINLOGO = MakeIntResource(32517) + IDI_WARNING = IDI_EXCLAMATION + IDI_ERROR = IDI_HAND + IDI_INFORMATION = IDI_ASTERISK +) + +//sys GetModuleHandle(modname *uint16) (handle uint32, errno int) = GetModuleHandleW +//sys RegisterClassEx(wndclass *Wndclassex) (atom uint16, errno int) = user32.RegisterClassExW +//sys CreateWindowEx(exstyle uint32, classname *uint16, windowname *uint16, style uint32, x int32, y int32, width int32, height int32, wndparent uint32, menu uint32, instance uint32, param uintptr) (hwnd uint32, errno int) = user32.CreateWindowExW +//sys DefWindowProc(hwnd uint32, msg uint32, wparam int32, lparam int32) (lresult int32) = user32.DefWindowProcW +//sys DestroyWindow(hwnd uint32) (errno int) = user32.DestroyWindow +//sys PostQuitMessage(exitcode int32) = user32.PostQuitMessage +//sys ShowWindow(hwnd uint32, cmdshow int32) (wasvisible bool) = user32.ShowWindow +//sys UpdateWindow(hwnd uint32) (errno int) = user32.UpdateWindow +//sys GetMessage(msg *Msg, hwnd uint32, MsgFilterMin uint32, MsgFilterMax uint32) (ret int32, errno int) [failretval==-1] = user32.GetMessageW +//sys TranslateMessage(msg *Msg) (done bool) = user32.TranslateMessage +//sys DispatchMessage(msg *Msg) (ret int32) = user32.DispatchMessageW +//sys LoadIcon(instance uint32, iconname *uint16) (icon uint32, errno int) = user32.LoadIconW +//sys LoadCursor(instance uint32, cursorname *uint16) (cursor uint32, errno int) = user32.LoadCursorW +//sys SetCursor(cursor uint32) (precursor uint32, errno int) = user32.SetCursor +//sys SendMessage(hwnd uint32, msg uint32, wparam int32, lparam int32) (lresult int32) = user32.SendMessageW +//sys PostMessage(hwnd uint32, msg uint32, wparam int32, lparam int32) (errno int) = user32.PostMessageW + +func MakeIntResource(id uint16) *uint16 { + return (*uint16)(unsafe.Pointer(uintptr(id))) +} diff --git a/wingui/wingdi.go b/wingui/wingdi.go new file mode 100644 index 0000000..be55d71 --- /dev/null +++ b/wingui/wingdi.go @@ -0,0 +1,134 @@ +package wingui + +import ( + "syscall" + "unsafe" +) + +const ( + + WM_PAINT = 15 + + BI_RGB = 0 + + DIB_PAL_COLORS = 1 + DIB_RGB_COLORS = 0 + + SRCCOPY = 0xCC0020 +) + +type RECT struct{ + Left int32 + Top int32 + Right int32 + Bottom int32 +} + +type PAINTSTRUCT struct{ + HDC uint32 + Erase int32 // bool + RcPaint RECT + Restore int32 // bool + IncUpdate int32 // bool + rgbReserved [32]byte +} + +type BITMAP struct{ + Type int32 + Width int32 + Height int32 + WidthBytes int32 + Planes uint16 + BitsPixel uint16 + Bits * byte +} + +type BITMAPINFOHEADER struct{ + Size uint32 + Width int32 + Height int32 + Planes uint16 + BitCount uint16 + Compression uint32 + SizeImage uint32 + XPelsPerMeter int32 + YPelsPerMeter int32 + ClrUsed uint32 + ClrImportant uint32 +} + +type BITMAPINFO struct{ + Header BITMAPINFOHEADER + Colors [1]RGBQUAD +} + +type RGBQUAD struct{ + Blue byte + Green byte + Red byte + Reserved byte +} + +var ( + modgdi32 = loadDll("gdi32.dll") + + procGetDC = getSysProcAddr(moduser32, "GetDC") + procCreateCompatibleDC = getSysProcAddr(modgdi32, "CreateCompatibleDC") + procGetObject = getSysProcAddr(modgdi32, "GetObjectW") + procSelectObject = getSysProcAddr(modgdi32, "SelectObject") + procBeginPaint = getSysProcAddr(moduser32, "BeginPaint") + procEndPaint = getSysProcAddr(moduser32, "EndPaint") + procCreateCompatibleBitmap = getSysProcAddr(modgdi32, "CreateCompatibleBitmap") + procCreateDIBSection = getSysProcAddr(modgdi32, "CreateDIBSection") + procBitBlt = getSysProcAddr(modgdi32, "BitBlt") + +) + +func GetDC(hwnd uint32) (hdc uint32) { + r0, _, _ := syscall.Syscall(procGetDC, 1, uintptr(hwnd), 0, 0) + hdc = uint32(r0) + return hdc +} + +func CreateCompatibleDC(hwnd uint32) (hdc uint32) { + r0, _, _ := syscall.Syscall(procCreateCompatibleDC, 1, uintptr(hwnd), 0, 0) + hdc = uint32(r0) + return hdc +} + +func GetObject(hgdiobj uint32, cbBuffer int, object uintptr) (size uint32) { + r0, _, _ := syscall.Syscall(procGetObject, 3, uintptr(hgdiobj), uintptr(cbBuffer), object) + size = uint32(r0) + return size +} + +func SelectObject(hdc uint32, hgdiobj uint32) (uint32) { + r0, _, _ := syscall.Syscall(procSelectObject, 2, uintptr(hdc), uintptr(hgdiobj), 0) + return uint32(r0) +} + +func BeginPaint(hwnd uint32, ps *PAINTSTRUCT) (hdc uint32) { + r0, _, _ := syscall.Syscall(procBeginPaint, 2, uintptr(hwnd), uintptr(unsafe.Pointer(ps)), 0) + hdc = uint32(r0) + return hdc +} + +func EndPaint(hwnd uint32, ps *PAINTSTRUCT) bool { + syscall.Syscall(procEndPaint, 2, uintptr(hwnd), uintptr(unsafe.Pointer(ps)), 0) + return true +} + +func CreateCompatibleBitmap(hdc uint32, width ,height int) ( hbitmap uint32) { + r0, _, _ := syscall.Syscall(procCreateCompatibleBitmap, 3, uintptr(hdc), uintptr(width), uintptr(height)) + return uint32(r0) +} + +func CreateDIBSection(hdc uint32, pbmi *BITMAPINFO , iUsage uint, ppvBits uintptr, hSection uint32, dwOffset uint32) ( hbitmap uint32) { + r0, _, _ := syscall.Syscall6(procCreateDIBSection, 6, uintptr(hdc), uintptr(unsafe.Pointer(pbmi)), uintptr(iUsage), ppvBits, uintptr(hSection), uintptr(dwOffset)) + return uint32(r0) +} + +func BitBlt(hdc uint32, nXDest, nYDest, nWidth, nHeight int, hdcSrc uint32, nXSrc, nYSrc int, dwRop uint32) ( bool) { + r0, _, _ := syscall.Syscall9(procBitBlt, 9, uintptr(hdc), uintptr(nXDest), uintptr(nYDest), uintptr(nWidth), uintptr(nHeight), uintptr(hdcSrc), uintptr(nXSrc), uintptr(nYSrc), uintptr(dwRop)) + return r0 != 0 +} \ No newline at end of file diff --git a/wingui/zwinapi.go b/wingui/zwinapi.go new file mode 100644 index 0000000..9ced49b --- /dev/null +++ b/wingui/zwinapi.go @@ -0,0 +1,209 @@ +package wingui + + +import "unsafe" +import "syscall" + +var ( + modkernel32 = loadDll("kernel32.dll") + moduser32 = loadDll("user32.dll") + + procGetModuleHandleW = getSysProcAddr(modkernel32, "GetModuleHandleW") + procRegisterClassExW = getSysProcAddr(moduser32, "RegisterClassExW") + procCreateWindowExW = getSysProcAddr(moduser32, "CreateWindowExW") + procDefWindowProcW = getSysProcAddr(moduser32, "DefWindowProcW") + procDestroyWindow = getSysProcAddr(moduser32, "DestroyWindow") + procPostQuitMessage = getSysProcAddr(moduser32, "PostQuitMessage") + procShowWindow = getSysProcAddr(moduser32, "ShowWindow") + procUpdateWindow = getSysProcAddr(moduser32, "UpdateWindow") + procGetMessageW = getSysProcAddr(moduser32, "GetMessageW") + procTranslateMessage = getSysProcAddr(moduser32, "TranslateMessage") + procDispatchMessageW = getSysProcAddr(moduser32, "DispatchMessageW") + procLoadIconW = getSysProcAddr(moduser32, "LoadIconW") + procLoadCursorW = getSysProcAddr(moduser32, "LoadCursorW") + procSetCursor = getSysProcAddr(moduser32, "SetCursor") + procSendMessageW = getSysProcAddr(moduser32, "SendMessageW") + procPostMessageW = getSysProcAddr(moduser32, "PostMessageW") +) + +func GetModuleHandle(modname *uint16) (handle uint32, errno int) { + r0, _, e1 := syscall.Syscall(procGetModuleHandleW, 1, uintptr(unsafe.Pointer(modname)), 0, 0) + handle = uint32(r0) + if handle == 0 { + if e1 != 0 { + errno = int(e1) + } else { + errno = syscall.EINVAL + } + } else { + errno = 0 + } + return +} + +func RegisterClassEx(wndclass *Wndclassex) (atom uint16, errno int) { + r0, _, e1 := syscall.Syscall(procRegisterClassExW, 1, uintptr(unsafe.Pointer(wndclass)), 0, 0) + atom = uint16(r0) + if atom == 0 { + if e1 != 0 { + errno = int(e1) + } else { + errno = syscall.EINVAL + } + } else { + errno = 0 + } + return +} + +func CreateWindowEx(exstyle uint32, classname *uint16, windowname *uint16, style uint32, x int32, y int32, width int32, height int32, wndparent uint32, menu uint32, instance uint32, param uintptr) (hwnd uint32, errno int) { + r0, _, e1 := syscall.Syscall12(procCreateWindowExW, 12, uintptr(exstyle), uintptr(unsafe.Pointer(classname)), uintptr(unsafe.Pointer(windowname)), uintptr(style), uintptr(x), uintptr(y), uintptr(width), uintptr(height), uintptr(wndparent), uintptr(menu), uintptr(instance), uintptr(param)) + hwnd = uint32(r0) + if hwnd == 0 { + if e1 != 0 { + errno = int(e1) + } else { + errno = syscall.EINVAL + } + } else { + errno = 0 + } + return +} + +func DefWindowProc(hwnd uint32, msg uint32, wparam int32, lparam int32) (lresult int32) { + r0, _, _ := syscall.Syscall6(procDefWindowProcW, 4, uintptr(hwnd), uintptr(msg), uintptr(wparam), uintptr(lparam), 0, 0) + lresult = int32(r0) + return +} + +func DestroyWindow(hwnd uint32) (errno int) { + r1, _, e1 := syscall.Syscall(procDestroyWindow, 1, uintptr(hwnd), 0, 0) + if int(r1) == 0 { + if e1 != 0 { + errno = int(e1) + } else { + errno = syscall.EINVAL + } + } else { + errno = 0 + } + return +} + +func PostQuitMessage(exitcode int32) { + syscall.Syscall(procPostQuitMessage, 1, uintptr(exitcode), 0, 0) + return +} + +func ShowWindow(hwnd uint32, cmdshow int32) (wasvisible bool) { + r0, _, _ := syscall.Syscall(procShowWindow, 2, uintptr(hwnd), uintptr(cmdshow), 0) + wasvisible = bool(r0 != 0) + return +} + +func UpdateWindow(hwnd uint32) (errno int) { + r1, _, e1 := syscall.Syscall(procUpdateWindow, 1, uintptr(hwnd), 0, 0) + if int(r1) == 0 { + if e1 != 0 { + errno = int(e1) + } else { + errno = syscall.EINVAL + } + } else { + errno = 0 + } + return +} + +func GetMessage(msg *Msg, hwnd uint32, MsgFilterMin uint32, MsgFilterMax uint32) (ret int32, errno int) { + r0, _, e1 := syscall.Syscall6(procGetMessageW, 4, uintptr(unsafe.Pointer(msg)), uintptr(hwnd), uintptr(MsgFilterMin), uintptr(MsgFilterMax), 0, 0) + ret = int32(r0) + if ret == -1 { + if e1 != 0 { + errno = int(e1) + } else { + errno = syscall.EINVAL + } + } else { + errno = 0 + } + return +} + +func TranslateMessage(msg *Msg) (done bool) { + r0, _, _ := syscall.Syscall(procTranslateMessage, 1, uintptr(unsafe.Pointer(msg)), 0, 0) + done = bool(r0 != 0) + return +} + +func DispatchMessage(msg *Msg) (ret int32) { + r0, _, _ := syscall.Syscall(procDispatchMessageW, 1, uintptr(unsafe.Pointer(msg)), 0, 0) + ret = int32(r0) + return +} + +func LoadIcon(instance uint32, iconname *uint16) (icon uint32, errno int) { + r0, _, e1 := syscall.Syscall(procLoadIconW, 2, uintptr(instance), uintptr(unsafe.Pointer(iconname)), 0) + icon = uint32(r0) + if icon == 0 { + if e1 != 0 { + errno = int(e1) + } else { + errno = syscall.EINVAL + } + } else { + errno = 0 + } + return +} + +func LoadCursor(instance uint32, cursorname *uint16) (cursor uint32, errno int) { + r0, _, e1 := syscall.Syscall(procLoadCursorW, 2, uintptr(instance), uintptr(unsafe.Pointer(cursorname)), 0) + cursor = uint32(r0) + if cursor == 0 { + if e1 != 0 { + errno = int(e1) + } else { + errno = syscall.EINVAL + } + } else { + errno = 0 + } + return +} + +func SetCursor(cursor uint32) (precursor uint32, errno int) { + r0, _, e1 := syscall.Syscall(procSetCursor, 1, uintptr(cursor), 0, 0) + precursor = uint32(r0) + if precursor == 0 { + if e1 != 0 { + errno = int(e1) + } else { + errno = syscall.EINVAL + } + } else { + errno = 0 + } + return +} + +func SendMessage(hwnd uint32, msg uint32, wparam int32, lparam int32) (lresult int32) { + r0, _, _ := syscall.Syscall6(procSendMessageW, 4, uintptr(hwnd), uintptr(msg), uintptr(wparam), uintptr(lparam), 0, 0) + lresult = int32(r0) + return +} + +func PostMessage(hwnd uint32, msg uint32, wparam int32, lparam int32) (errno int) { + r1, _, e1 := syscall.Syscall6(procPostMessageW, 4, uintptr(hwnd), uintptr(msg), uintptr(wparam), uintptr(lparam), 0, 0) + if int(r1) == 0 { + if e1 != 0 { + errno = int(e1) + } else { + errno = syscall.EINVAL + } + } else { + errno = 0 + } + return +}