func (wb *WindowBase) dialogBaseUnitsToPixels(dlus Size) (pixels Size) {
// FIXME: Cache dialog base units on font change.
base := wb.dialogBaseUnits()
return Size{
int(win.MulDiv(int32(dlus.Width), int32(base.Width), 4)),
int(win.MulDiv(int32(dlus.Height), int32(base.Height), 8)),
}
}
func newFontFromLOGFONT(lf *win.LOGFONT, dpi int) (*Font, error) {
if lf == nil {
return nil, newError("lf cannot be nil")
}
family := win.UTF16PtrToString(&lf.LfFaceName[0])
pointSize := int(win.MulDiv(lf.LfHeight, 72, int32(dpi)))
if pointSize < 0 {
pointSize = -pointSize
}
var style FontStyle
if lf.LfWeight > win.FW_NORMAL {
style |= FontBold
}
if lf.LfItalic == win.TRUE {
style |= FontItalic
}
if lf.LfUnderline == win.TRUE {
style |= FontUnderline
}
if lf.LfStrikeOut == win.TRUE {
style |= FontStrikeOut
}
return NewFont(family, pointSize, style)
}
func (f *Font) createForDPI(dpi int) win.HFONT {
var lf win.LOGFONT
lf.LfHeight = -win.MulDiv(int32(f.pointSize), int32(dpi), 72)
if f.style&FontBold > 0 {
lf.LfWeight = win.FW_BOLD
} else {
lf.LfWeight = win.FW_NORMAL
}
if f.style&FontItalic > 0 {
lf.LfItalic = 1
}
if f.style&FontUnderline > 0 {
lf.LfUnderline = 1
}
if f.style&FontStrikeOut > 0 {
lf.LfStrikeOut = 1
}
lf.LfCharSet = win.DEFAULT_CHARSET
lf.LfOutPrecision = win.OUT_TT_PRECIS
lf.LfClipPrecision = win.CLIP_DEFAULT_PRECIS
lf.LfQuality = win.CLEARTYPE_QUALITY
lf.LfPitchAndFamily = win.VARIABLE_PITCH | win.FF_SWISS
src := syscall.StringToUTF16(f.family)
dest := lf.LfFaceName[:]
copy(dest, src)
return win.CreateFontIndirect(&lf)
}