Added _windows.go extensions to all the files in preparation for the library writing.

1 files changed, 74 insertions, 0 deletions

diff --git a/stdfont_windows.go b/stdfont_windows.go
new file mode 100644
index 0000000..8dcba9f
--- /dev/null
+++ b/stdfont_windows.go
@@ -0,0 +1,74 @@
+// 10 february 2014
+package main
+
+import (
+//	"syscall"
+	"unsafe"
+)
+
+const (
+	SPI_GETNONCLIENTMETRICS = 0x0029
+	LF_FACESIZE = 32		// from wingdi.h
+)
+
+type LOGFONT struct {
+	lfHeight			int32
+	lfWidth			int32
+	lfEscapement		int32
+	lfOrientation		int32
+	lfWeight			int32
+	lfItalic			byte
+	lfUnderline		byte
+	lfStrikeOut		byte
+	lfCharSet			byte
+	lfOutPrecision		byte
+	lfClipPrecision		byte
+	lfQuality			byte
+	lfPitchAndFamily	byte
+	lfFaceName		[LF_FACESIZE]uint16
+}
+
+type NONCLIENTMETRICS struct {
+	cbSize			uint32
+	iBorderWidth		int
+	iScrollWidth		int
+	iScrollHeight		int
+	iCaptionWidth		int
+	iCaptionHeight		int
+	lfCaptionFont		LOGFONT
+	iSmCaptionWidth	int
+	iSmCaptionHeight	int
+	lfSmCaptionFont	LOGFONT
+	iMenuWidth		int
+	iMenuHeight		int
+	lfMenuFont		LOGFONT
+	lfStatusFont		LOGFONT
+	lfMessageFont		LOGFONT
+}
+
+var (
+	systemParametersInfo = user32.NewProc("SystemParametersInfoW")
+	createFontIndirect = gdi32.NewProc("CreateFontIndirectW")
+)
+
+// TODO adorn errors with which step failed?
+// TODO this specific font doesn't seem like the right one but that's all I could find for what people actually use; also I need to return the other ones and check HWND types to make sure I apply the right font to the right thing...
+func getStandardWindowFont() (hfont HANDLE, err error) {
+	var ncm NONCLIENTMETRICS
+
+	ncm.cbSize = uint32(unsafe.Sizeof(ncm))
+	r1, _, err := systemParametersInfo.Call(
+		uintptr(SPI_GETNONCLIENTMETRICS),
+		uintptr(unsafe.Sizeof(ncm)),
+		uintptr(unsafe.Pointer(&ncm)),
+		0)
+	if r1 == 0 {		// failure
+		return NULL, err
+	}
+	// TODO does this specify an error?
+	r1, _, err = createFontIndirect.Call(uintptr(unsafe.Pointer(&ncm.lfMessageFont)))
+	if r1 == 0 {		// failure
+		return NULL, err
+	}
+	return HANDLE(r1), nil
+}