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// Copyright 2010-2012 The W32 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 w32
import (
"syscall"
"unsafe"
)
var (
modgdi32 = syscall.NewLazyDLL("gdi32.dll")
procGetDeviceCaps = modgdi32.NewProc("GetDeviceCaps")
procDeleteObject = modgdi32.NewProc("DeleteObject")
procCreateFontIndirect = modgdi32.NewProc("CreateFontIndirectW")
procAbortDoc = modgdi32.NewProc("AbortDoc")
procBitBlt = modgdi32.NewProc("BitBlt")
procCloseEnhMetaFile = modgdi32.NewProc("CloseEnhMetaFile")
procCopyEnhMetaFile = modgdi32.NewProc("CopyEnhMetaFileW")
procCreateBrushIndirect = modgdi32.NewProc("CreateBrushIndirect")
procCreateCompatibleDC = modgdi32.NewProc("CreateCompatibleDC")
procCreateDC = modgdi32.NewProc("CreateDCW")
procCreateDIBSection = modgdi32.NewProc("CreateDIBSection")
procCreateEnhMetaFile = modgdi32.NewProc("CreateEnhMetaFileW")
procCreateIC = modgdi32.NewProc("CreateICW")
procDeleteDC = modgdi32.NewProc("DeleteDC")
procDeleteEnhMetaFile = modgdi32.NewProc("DeleteEnhMetaFile")
procEllipse = modgdi32.NewProc("Ellipse")
procEndDoc = modgdi32.NewProc("EndDoc")
procEndPage = modgdi32.NewProc("EndPage")
procExtCreatePen = modgdi32.NewProc("ExtCreatePen")
procGetEnhMetaFile = modgdi32.NewProc("GetEnhMetaFileW")
procGetEnhMetaFileHeader = modgdi32.NewProc("GetEnhMetaFileHeader")
procGetObject = modgdi32.NewProc("GetObjectW")
procGetStockObject = modgdi32.NewProc("GetStockObject")
procGetTextExtentExPoint = modgdi32.NewProc("GetTextExtentExPointW")
procGetTextExtentPoint32 = modgdi32.NewProc("GetTextExtentPoint32W")
procGetTextMetrics = modgdi32.NewProc("GetTextMetricsW")
procLineTo = modgdi32.NewProc("LineTo")
procMoveToEx = modgdi32.NewProc("MoveToEx")
procPlayEnhMetaFile = modgdi32.NewProc("PlayEnhMetaFile")
procRectangle = modgdi32.NewProc("Rectangle")
procResetDC = modgdi32.NewProc("ResetDCW")
procSelectObject = modgdi32.NewProc("SelectObject")
procSetBkMode = modgdi32.NewProc("SetBkMode")
procSetBrushOrgEx = modgdi32.NewProc("SetBrushOrgEx")
procSetStretchBltMode = modgdi32.NewProc("SetStretchBltMode")
procSetTextColor = modgdi32.NewProc("SetTextColor")
procSetBkColor = modgdi32.NewProc("SetBkColor")
procStartDoc = modgdi32.NewProc("StartDocW")
procStartPage = modgdi32.NewProc("StartPage")
procStretchBlt = modgdi32.NewProc("StretchBlt")
procSetDIBitsToDevice = modgdi32.NewProc("SetDIBitsToDevice")
procChoosePixelFormat = modgdi32.NewProc("ChoosePixelFormat")
procDescribePixelFormat = modgdi32.NewProc("DescribePixelFormat")
procGetEnhMetaFilePixelFormat = modgdi32.NewProc("GetEnhMetaFilePixelFormat")
procGetPixelFormat = modgdi32.NewProc("GetPixelFormat")
procSetPixelFormat = modgdi32.NewProc("SetPixelFormat")
procSwapBuffers = modgdi32.NewProc("SwapBuffers")
)
func GetDeviceCaps(hdc HDC, index int) int {
ret, _, _ := procGetDeviceCaps.Call(
uintptr(hdc),
uintptr(index))
return int(ret)
}
func DeleteObject(hObject HGDIOBJ) bool {
ret, _, _ := procDeleteObject.Call(
uintptr(hObject))
return ret != 0
}
func CreateFontIndirect(logFont *LOGFONT) HFONT {
ret, _, _ := procCreateFontIndirect.Call(
uintptr(unsafe.Pointer(logFont)))
return HFONT(ret)
}
func AbortDoc(hdc HDC) int {
ret, _, _ := procAbortDoc.Call(
uintptr(hdc))
return int(ret)
}
func BitBlt(hdcDest HDC, nXDest, nYDest, nWidth, nHeight int, hdcSrc HDC, nXSrc, nYSrc int, dwRop uint) {
ret, _, _ := procBitBlt.Call(
uintptr(hdcDest),
uintptr(nXDest),
uintptr(nYDest),
uintptr(nWidth),
uintptr(nHeight),
uintptr(hdcSrc),
uintptr(nXSrc),
uintptr(nYSrc),
uintptr(dwRop))
if ret == 0 {
panic("BitBlt failed")
}
}
func CloseEnhMetaFile(hdc HDC) HENHMETAFILE {
ret, _, _ := procCloseEnhMetaFile.Call(
uintptr(hdc))
return HENHMETAFILE(ret)
}
func CopyEnhMetaFile(hemfSrc HENHMETAFILE, lpszFile *uint16) HENHMETAFILE {
ret, _, _ := procCopyEnhMetaFile.Call(
uintptr(hemfSrc),
uintptr(unsafe.Pointer(lpszFile)))
return HENHMETAFILE(ret)
}
func CreateBrushIndirect(lplb *LOGBRUSH) HBRUSH {
ret, _, _ := procCreateBrushIndirect.Call(
uintptr(unsafe.Pointer(lplb)))
return HBRUSH(ret)
}
func CreateCompatibleDC(hdc HDC) HDC {
ret, _, _ := procCreateCompatibleDC.Call(
uintptr(hdc))
if ret == 0 {
panic("Create compatible DC failed")
}
return HDC(ret)
}
func CreateDC(lpszDriver, lpszDevice, lpszOutput *uint16, lpInitData *DEVMODE) HDC {
ret, _, _ := procCreateDC.Call(
uintptr(unsafe.Pointer(lpszDriver)),
uintptr(unsafe.Pointer(lpszDevice)),
uintptr(unsafe.Pointer(lpszOutput)),
uintptr(unsafe.Pointer(lpInitData)))
return HDC(ret)
}
func CreateDIBSection(hdc HDC, pbmi *BITMAPINFO, iUsage uint, ppvBits *unsafe.Pointer, hSection HANDLE, dwOffset uint) HBITMAP {
ret, _, _ := procCreateDIBSection.Call(
uintptr(hdc),
uintptr(unsafe.Pointer(pbmi)),
uintptr(iUsage),
uintptr(unsafe.Pointer(ppvBits)),
uintptr(hSection),
uintptr(dwOffset))
return HBITMAP(ret)
}
func CreateEnhMetaFile(hdcRef HDC, lpFilename *uint16, lpRect *RECT, lpDescription *uint16) HDC {
ret, _, _ := procCreateEnhMetaFile.Call(
uintptr(hdcRef),
uintptr(unsafe.Pointer(lpFilename)),
uintptr(unsafe.Pointer(lpRect)),
uintptr(unsafe.Pointer(lpDescription)))
return HDC(ret)
}
func CreateIC(lpszDriver, lpszDevice, lpszOutput *uint16, lpdvmInit *DEVMODE) HDC {
ret, _, _ := procCreateIC.Call(
uintptr(unsafe.Pointer(lpszDriver)),
uintptr(unsafe.Pointer(lpszDevice)),
uintptr(unsafe.Pointer(lpszOutput)),
uintptr(unsafe.Pointer(lpdvmInit)))
return HDC(ret)
}
func DeleteDC(hdc HDC) bool {
ret, _, _ := procDeleteDC.Call(
uintptr(hdc))
return ret != 0
}
func DeleteEnhMetaFile(hemf HENHMETAFILE) bool {
ret, _, _ := procDeleteEnhMetaFile.Call(
uintptr(hemf))
return ret != 0
}
func Ellipse(hdc HDC, nLeftRect, nTopRect, nRightRect, nBottomRect int) bool {
ret, _, _ := procEllipse.Call(
uintptr(hdc),
uintptr(nLeftRect),
uintptr(nTopRect),
uintptr(nRightRect),
uintptr(nBottomRect))
return ret != 0
}
func EndDoc(hdc HDC) int {
ret, _, _ := procEndDoc.Call(
uintptr(hdc))
return int(ret)
}
func EndPage(hdc HDC) int {
ret, _, _ := procEndPage.Call(
uintptr(hdc))
return int(ret)
}
func ExtCreatePen(dwPenStyle, dwWidth uint, lplb *LOGBRUSH, dwStyleCount uint, lpStyle *uint) HPEN {
ret, _, _ := procExtCreatePen.Call(
uintptr(dwPenStyle),
uintptr(dwWidth),
uintptr(unsafe.Pointer(lplb)),
uintptr(dwStyleCount),
uintptr(unsafe.Pointer(lpStyle)))
return HPEN(ret)
}
func GetEnhMetaFile(lpszMetaFile *uint16) HENHMETAFILE {
ret, _, _ := procGetEnhMetaFile.Call(
uintptr(unsafe.Pointer(lpszMetaFile)))
return HENHMETAFILE(ret)
}
func GetEnhMetaFileHeader(hemf HENHMETAFILE, cbBuffer uint, lpemh *ENHMETAHEADER) uint {
ret, _, _ := procGetEnhMetaFileHeader.Call(
uintptr(hemf),
uintptr(cbBuffer),
uintptr(unsafe.Pointer(lpemh)))
return uint(ret)
}
func GetObject(hgdiobj HGDIOBJ, cbBuffer uintptr, lpvObject unsafe.Pointer) int {
ret, _, _ := procGetObject.Call(
uintptr(hgdiobj),
uintptr(cbBuffer),
uintptr(lpvObject))
return int(ret)
}
func GetStockObject(fnObject int) HGDIOBJ {
ret, _, _ := procGetDeviceCaps.Call(
uintptr(fnObject))
return HGDIOBJ(ret)
}
func GetTextExtentExPoint(hdc HDC, lpszStr *uint16, cchString, nMaxExtent int, lpnFit, alpDx *int, lpSize *SIZE) bool {
ret, _, _ := procGetTextExtentExPoint.Call(
uintptr(hdc),
uintptr(unsafe.Pointer(lpszStr)),
uintptr(cchString),
uintptr(nMaxExtent),
uintptr(unsafe.Pointer(lpnFit)),
uintptr(unsafe.Pointer(alpDx)),
uintptr(unsafe.Pointer(lpSize)))
return ret != 0
}
func GetTextExtentPoint32(hdc HDC, lpString *uint16, c int, lpSize *SIZE) bool {
ret, _, _ := procGetTextExtentPoint32.Call(
uintptr(hdc),
uintptr(unsafe.Pointer(lpString)),
uintptr(c),
uintptr(unsafe.Pointer(lpSize)))
return ret != 0
}
func GetTextMetrics(hdc HDC, lptm *TEXTMETRIC) bool {
ret, _, _ := procGetTextMetrics.Call(
uintptr(hdc),
uintptr(unsafe.Pointer(lptm)))
return ret != 0
}
func LineTo(hdc HDC, nXEnd, nYEnd int) bool {
ret, _, _ := procLineTo.Call(
uintptr(hdc),
uintptr(nXEnd),
uintptr(nYEnd))
return ret != 0
}
func MoveToEx(hdc HDC, x, y int, lpPoint *POINT) bool {
ret, _, _ := procMoveToEx.Call(
uintptr(hdc),
uintptr(x),
uintptr(y),
uintptr(unsafe.Pointer(lpPoint)))
return ret != 0
}
func PlayEnhMetaFile(hdc HDC, hemf HENHMETAFILE, lpRect *RECT) bool {
ret, _, _ := procPlayEnhMetaFile.Call(
uintptr(hdc),
uintptr(hemf),
uintptr(unsafe.Pointer(lpRect)))
return ret != 0
}
func Rectangle(hdc HDC, nLeftRect, nTopRect, nRightRect, nBottomRect int) bool {
ret, _, _ := procRectangle.Call(
uintptr(hdc),
uintptr(nLeftRect),
uintptr(nTopRect),
uintptr(nRightRect),
uintptr(nBottomRect))
return ret != 0
}
func ResetDC(hdc HDC, lpInitData *DEVMODE) HDC {
ret, _, _ := procResetDC.Call(
uintptr(hdc),
uintptr(unsafe.Pointer(lpInitData)))
return HDC(ret)
}
func SelectObject(hdc HDC, hgdiobj HGDIOBJ) HGDIOBJ {
ret, _, _ := procSelectObject.Call(
uintptr(hdc),
uintptr(hgdiobj))
if ret == 0 {
panic("SelectObject failed")
}
return HGDIOBJ(ret)
}
func SetBkMode(hdc HDC, iBkMode int) int {
ret, _, _ := procSetBkMode.Call(
uintptr(hdc),
uintptr(iBkMode))
if ret == 0 {
panic("SetBkMode failed")
}
return int(ret)
}
func SetBrushOrgEx(hdc HDC, nXOrg, nYOrg int, lppt *POINT) bool {
ret, _, _ := procSetBrushOrgEx.Call(
uintptr(hdc),
uintptr(nXOrg),
uintptr(nYOrg),
uintptr(unsafe.Pointer(lppt)))
return ret != 0
}
func SetStretchBltMode(hdc HDC, iStretchMode int) int {
ret, _, _ := procSetStretchBltMode.Call(
uintptr(hdc),
uintptr(iStretchMode))
return int(ret)
}
func SetTextColor(hdc HDC, crColor COLORREF) COLORREF {
ret, _, _ := procSetTextColor.Call(
uintptr(hdc),
uintptr(crColor))
if ret == CLR_INVALID {
panic("SetTextColor failed")
}
return COLORREF(ret)
}
func SetBkColor(hdc HDC, crColor COLORREF) COLORREF {
ret, _, _ := procSetBkColor.Call(
uintptr(hdc),
uintptr(crColor))
if ret == CLR_INVALID {
panic("SetBkColor failed")
}
return COLORREF(ret)
}
func StartDoc(hdc HDC, lpdi *DOCINFO) int {
ret, _, _ := procStartDoc.Call(
uintptr(hdc),
uintptr(unsafe.Pointer(lpdi)))
return int(ret)
}
func StartPage(hdc HDC) int {
ret, _, _ := procStartPage.Call(
uintptr(hdc))
return int(ret)
}
func StretchBlt(hdcDest HDC, nXOriginDest, nYOriginDest, nWidthDest, nHeightDest int, hdcSrc HDC, nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc int, dwRop uint) {
ret, _, _ := procStretchBlt.Call(
uintptr(hdcDest),
uintptr(nXOriginDest),
uintptr(nYOriginDest),
uintptr(nWidthDest),
uintptr(nHeightDest),
uintptr(hdcSrc),
uintptr(nXOriginSrc),
uintptr(nYOriginSrc),
uintptr(nWidthSrc),
uintptr(nHeightSrc),
uintptr(dwRop))
if ret == 0 {
panic("StretchBlt failed")
}
}
func SetDIBitsToDevice(hdc HDC, xDest, yDest, dwWidth, dwHeight, xSrc, ySrc int, uStartScan, cScanLines uint, lpvBits []byte, lpbmi *BITMAPINFO, fuColorUse uint) int {
ret, _, _ := procSetDIBitsToDevice.Call(
uintptr(hdc),
uintptr(xDest),
uintptr(yDest),
uintptr(dwWidth),
uintptr(dwHeight),
uintptr(xSrc),
uintptr(ySrc),
uintptr(uStartScan),
uintptr(cScanLines),
uintptr(unsafe.Pointer(&lpvBits[0])),
uintptr(unsafe.Pointer(lpbmi)),
uintptr(fuColorUse))
return int(ret)
}
func ChoosePixelFormat(hdc HDC, pfd *PIXELFORMATDESCRIPTOR) int {
ret, _, _ := procChoosePixelFormat.Call(
uintptr(hdc),
uintptr(unsafe.Pointer(pfd)),
)
return int(ret)
}
func DescribePixelFormat(hdc HDC, iPixelFormat int, nBytes uint, pfd *PIXELFORMATDESCRIPTOR) int {
ret, _, _ := procDescribePixelFormat.Call(
uintptr(hdc),
uintptr(iPixelFormat),
uintptr(nBytes),
uintptr(unsafe.Pointer(pfd)),
)
return int(ret)
}
func GetEnhMetaFilePixelFormat(hemf HENHMETAFILE, cbBuffer uint32, pfd *PIXELFORMATDESCRIPTOR) uint {
ret, _, _ := procGetEnhMetaFilePixelFormat.Call(
uintptr(hemf),
uintptr(cbBuffer),
uintptr(unsafe.Pointer(pfd)),
)
return uint(ret)
}
func GetPixelFormat(hdc HDC) int {
ret, _, _ := procGetPixelFormat.Call(
uintptr(hdc),
)
return int(ret)
}
func SetPixelFormat(hdc HDC, iPixelFormat int, pfd *PIXELFORMATDESCRIPTOR) bool {
ret, _, _ := procSetPixelFormat.Call(
uintptr(hdc),
uintptr(iPixelFormat),
uintptr(unsafe.Pointer(pfd)),
)
return ret == TRUE
}
func SwapBuffers(hdc HDC) bool {
ret, _, _ := procSwapBuffers.Call(uintptr(hdc))
return ret == TRUE
}