Add some region functions + TransparentBlt

Author: lxn

gdi32.go

@@ -731,6 +731,23 @@ const (
 	GRADIENT_FILL_TRIANGLE = 0x02
 )
 
+// Region Combine Modes
+const (
+	RGN_AND  = 1
+	RGN_OR   = 2
+	RGN_XOR  = 3
+	RGN_DIFF = 4
+	RGN_COPY = 5
+)
+
+// Region Types
+const (
+	REGIONERROR   = 0
+	NULLREGION    = 1
+	SIMPLEREGION  = 2
+	COMPLEXREGION = 3
+)
+
 type (
 	COLORREF     uint32
 	HBITMAP      HGDIOBJ
@@ -741,7 +758,7 @@ type (
 	HENHMETAFILE HANDLE
 	HPALETTE     HGDIOBJ
 	HPEN         HGDIOBJ
-	HREGION      HGDIOBJ
+	HRGN         HGDIOBJ
 )
 
 type PIXELFORMATDESCRIPTOR struct {
@@ -1001,6 +1018,7 @@ var (
 	bitBlt                 uintptr
 	choosePixelFormat      uintptr
 	closeEnhMetaFile       uintptr
+	combineRgn             uintptr
 	copyEnhMetaFile        uintptr
 	createBitmap           uintptr
 	createCompatibleBitmap uintptr
@@ -1012,6 +1030,7 @@ var (
 	createEnhMetaFile      uintptr
 	createIC               uintptr
 	createPatternBrush     uintptr
+	createRectRgn          uintptr
 	deleteDC               uintptr
 	deleteEnhMetaFile      uintptr
 	deleteObject           uintptr
@@ -1020,12 +1039,14 @@ var (
 	endPage                uintptr
 	excludeClipRect        uintptr
 	extCreatePen           uintptr
+	fillRgn                uintptr
 	getDeviceCaps          uintptr
 	getDIBits              uintptr
 	getEnhMetaFile         uintptr
 	getEnhMetaFileHeader   uintptr
 	getObject              uintptr
 	getPixel               uintptr
+	getRgnBox              uintptr
 	getStockObject         uintptr
 	getTextExtentExPoint   uintptr
 	getTextExtentPoint32   uintptr
@@ -1055,6 +1076,7 @@ var (
 	stretchBlt             uintptr
 	swapBuffers            uintptr
 	textOut                uintptr
+	transparentBlt         uintptr
 )
 
 func init() {
@@ -1067,6 +1089,7 @@ func init() {
 	bitBlt = MustGetProcAddress(libgdi32, "BitBlt")
 	choosePixelFormat = MustGetProcAddress(libgdi32, "ChoosePixelFormat")
 	closeEnhMetaFile = MustGetProcAddress(libgdi32, "CloseEnhMetaFile")
+	combineRgn = MustGetProcAddress(libgdi32, "CombineRgn")
 	copyEnhMetaFile = MustGetProcAddress(libgdi32, "CopyEnhMetaFileW")
 	createBitmap = MustGetProcAddress(libgdi32, "CreateBitmap")
 	createCompatibleBitmap = MustGetProcAddress(libgdi32, "CreateCompatibleBitmap")
@@ -1078,6 +1101,7 @@ func init() {
 	createFontIndirect = MustGetProcAddress(libgdi32, "CreateFontIndirectW")
 	createIC = MustGetProcAddress(libgdi32, "CreateICW")
 	createPatternBrush = MustGetProcAddress(libgdi32, "CreatePatternBrush")
+	createRectRgn = MustGetProcAddress(libgdi32, "CreateRectRgn")
 	deleteDC = MustGetProcAddress(libgdi32, "DeleteDC")
 	deleteEnhMetaFile = MustGetProcAddress(libgdi32, "DeleteEnhMetaFile")
 	deleteObject = MustGetProcAddress(libgdi32, "DeleteObject")
@@ -1086,12 +1110,14 @@ func init() {
 	endPage = MustGetProcAddress(libgdi32, "EndPage")
 	excludeClipRect = MustGetProcAddress(libgdi32, "ExcludeClipRect")
 	extCreatePen = MustGetProcAddress(libgdi32, "ExtCreatePen")
+	fillRgn = MustGetProcAddress(libgdi32, "FillRgn")
 	getDeviceCaps = MustGetProcAddress(libgdi32, "GetDeviceCaps")
 	getDIBits = MustGetProcAddress(libgdi32, "GetDIBits")
 	getEnhMetaFile = MustGetProcAddress(libgdi32, "GetEnhMetaFileW")
 	getEnhMetaFileHeader = MustGetProcAddress(libgdi32, "GetEnhMetaFileHeader")
 	getObject = MustGetProcAddress(libgdi32, "GetObjectW")
 	getPixel = MustGetProcAddress(libgdi32, "GetPixel")
+	getRgnBox = MustGetProcAddress(libgdi32, "GetRgnBox")
 	getStockObject = MustGetProcAddress(libgdi32, "GetStockObject")
 	getTextExtentExPoint = MustGetProcAddress(libgdi32, "GetTextExtentExPointW")
 	getTextExtentPoint32 = MustGetProcAddress(libgdi32, "GetTextExtentPoint32W")
@@ -1122,6 +1148,7 @@ func init() {
 	textOut = MustGetProcAddress(libgdi32, "TextOutW")
 
 	gradientFill = MustGetProcAddress(libmsimg32, "GradientFill")
+	transparentBlt = MustGetProcAddress(libmsimg32, "TransparentBlt")
 }
 
 func AbortDoc(hdc HDC) int32 {
@@ -1166,6 +1193,18 @@ func CloseEnhMetaFile(hdc HDC) HENHMETAFILE {
 	return HENHMETAFILE(ret)
 }
 
+func CombineRgn(hrgnDest, hrgnSrc1, hrgnSrc2 HRGN, fnCombineMode int32) int32 {
+	ret, _, _ := syscall.Syscall6(combineRgn, 4,
+		uintptr(hrgnDest),
+		uintptr(hrgnSrc1),
+		uintptr(hrgnSrc2),
+		uintptr(fnCombineMode),
+		0,
+		0)
+
+	return int32(ret)
+}
+
 func CopyEnhMetaFile(hemfSrc HENHMETAFILE, lpszFile *uint16) HENHMETAFILE {
 	ret, _, _ := syscall.Syscall(copyEnhMetaFile, 2,
 		uintptr(hemfSrc),
@@ -1280,6 +1319,18 @@ func CreatePatternBrush(hbmp HBITMAP) HBRUSH {
 	return HBRUSH(ret)
 }
 
+func CreateRectRgn(nLeftRect, nTopRect, nRightRect, nBottomRect int32) HRGN {
+	ret, _, _ := syscall.Syscall6(createRectRgn, 4,
+		uintptr(nLeftRect),
+		uintptr(nTopRect),
+		uintptr(nRightRect),
+		uintptr(nBottomRect),
+		0,
+		0)
+
+	return HRGN(ret)
+}
+
 func DeleteDC(hdc HDC) bool {
 	ret, _, _ := syscall.Syscall(deleteDC, 1,
 		uintptr(hdc),
@@ -1361,6 +1412,15 @@ func ExtCreatePen(dwPenStyle, dwWidth uint32, lplb *LOGBRUSH, dwStyleCount uint3
 	return HPEN(ret)
 }
 
+func FillRgn(hdc HDC, hrgn HRGN, hbr HBRUSH) bool {
+	ret, _, _ := syscall.Syscall(fillRgn, 3,
+		uintptr(hdc),
+		uintptr(hrgn),
+		uintptr(hbr))
+
+	return ret != 0
+}
+
 func GetDeviceCaps(hdc HDC, nIndex int32) int32 {
 	ret, _, _ := syscall.Syscall(getDeviceCaps, 2,
 		uintptr(hdc),
@@ -1420,6 +1480,15 @@ func GetPixel(hdc HDC, nXPos, nYPos int32) COLORREF {
 	return COLORREF(ret)
 }
 
+func GetRgnBox(hrgn HRGN, lprc *RECT) int32 {
+	ret, _, _ := syscall.Syscall(getRgnBox, 2,
+		uintptr(hrgn),
+		uintptr(unsafe.Pointer(lprc)),
+		0)
+
+	return int32(ret)
+}
+
 func GetStockObject(fnObject int32) HGDIOBJ {
 	ret, _, _ := syscall.Syscall(getStockObject, 1,
 		uintptr(fnObject),
@@ -1719,3 +1788,21 @@ func TextOut(hdc HDC, nXStart, nYStart int32, lpString *uint16, cchString int32)
 		0)
 	return ret != 0
 }
+
+func TransparentBlt(hdcDest HDC, xoriginDest, yoriginDest, wDest, hDest int32, hdcSrc HDC, xoriginSrc, yoriginSrc, wSrc, hSrc int32, crTransparent uint32) bool {
+	ret, _, _ := syscall.Syscall12(transparentBlt, 11,
+		uintptr(hdcDest),
+		uintptr(xoriginDest),
+		uintptr(yoriginDest),
+		uintptr(wDest),
+		uintptr(hDest),
+		uintptr(hdcSrc),
+		uintptr(xoriginSrc),
+		uintptr(yoriginSrc),
+		uintptr(wSrc),
+		uintptr(hSrc),
+		uintptr(crTransparent),
+		0)
+
+	return ret != 0
+}