Removed the GDI+ dependency on Windows since we no longer use it.

area_windows.go

@@ -184,7 +184,7 @@ func paintArea(s *sysData) {
 
 	// now we have to do TWO MORE things before we can finally do alpha blending
 	// first, we need to load the bitmap memory, because Windows makes it for us
-	// the pixels are arranged in RGBA order, but GDI+ requires BGRA
+	// the pixels are arranged in RGBA order, but GDI requires BGRA
 	// this turns out to be just ARGB in little endian; let's convert into this memory
 	// the bitmap Windows gives us has a stride == width
 	toARGB(i, ppvBits, i.Rect.Dx() * 4)

common_windows.go

@@ -12,7 +12,6 @@ var (
 	kernel32 = syscall.NewLazyDLL("kernel32.dll")
 	gdi32 = syscall.NewLazyDLL("gdi32.dll")
 	comctl32 *syscall.LazyDLL		// comctl32 not defined here; see comctl_windows.go
-	gdiplus = syscall.NewLazyDLL("gdiplus.dll")
 	msimg32 = syscall.NewLazyDLL("msimg32.dll")
 )
 

init_windows.go

@@ -11,7 +11,6 @@ import (
 var (
 	hInstance		_HANDLE
 	nCmdShow	int
-	gdiplusToken	uintptr
 )
 
 // TODO is this trick documented in MSDN?
@@ -57,26 +56,6 @@ func getWinMainnCmdShow() {
 	}
 }
 
-func initGDIPlus() (err error) {
-	var gdiplusInit struct {
-		GdiplusVersion				uint32
-		DebugEventCallback			uintptr
-		SuppressBackgroundThread	int32		// originally BOOL
-		SuppressExternalCodecs		int32		// originally BOOL
-	}
-
-	gdiplusInit.GdiplusVersion = 1		// required
-	// TODO suppress external codecs?
-	r1, _, err := gdiplus.NewProc("GdiplusStartup").Call(
-		uintptr(unsafe.Pointer(&gdiplusToken)),
-		uintptr(unsafe.Pointer(&gdiplusInit)),
-		uintptr(0))		// we use the GDI+ thread so no need for output info
-	if r1 != 0 {			// failure
-		return fmt.Errorf("error initializing GDI+ (GDI+ error code %d; windows last error %v)", r1, err)
-	}
-	return nil
-}
-
 func doWindowsInit() (err error) {
 	err = getWinMainhInstance()
 	if err != nil {
@@ -95,14 +74,6 @@ func doWindowsInit() (err error) {
 	if err != nil {
 		return fmt.Errorf("error initializing Common Controls (comctl32.dll): %v", err)
 	}
-	err = initGDIPlus()
-	if err != nil {
-		return fmt.Errorf("error initializing GDI+ (gdiplus.dll): %v", err)
-	}
 	// TODO others
 	return nil		// all ready to go
 }
-
-func doWindowsQuitStuff() {
-	gdiplus.NewProc("GdiplusShutdown").Call(gdiplusToken)		// returns void according to MSDN
-}

uitask_windows.go

@@ -87,8 +87,6 @@ func ui(main func()) error {
 	}()
 
 	msgloop()
-
-	doWindowsQuitStuff()
 	return nil
 }