Unable to set a printer font

AndyS19 · May 22, 2018

I am trying to print using a small font, but no mater how I try it, the printed font remains unchanged.
I have created a sample script that sets the font to 8.
Here are the functions I use to create, then set the font:

Func _Printer_SetFont($hDC)
    Local $hFont

    If ($a__Printer_Font == 0) Then
        _Printer_MakeFont()
    EndIf

    $hFont = $a__Printer_Font
    _LogMsg("+++: $hDC & " & $hDC & ", $hFont = " & $hFont)

    _WinAPI_SetFont($hDC, $hFont) ; <=====================

EndFunc   ;==>_Printer_SetFont

Func _Printer_MakeFont()
    Local $hFontDC, $err, $errm, $str, $flag, $iHeight

    $flag = $FW_BOLD
    $iHeight = 8

    $hFontDC = _WinAPI_CreateFont( _
            $iHeight, _
            0, _ ; average character width
            0, _ ; angle of escape
            0, _ ; base-line orientation
            $flag, _ ; font weight - $FW_NORMAL, $FW_BOLD, etc.
            False, _ ; italic
            False, _ ; underline
            False, _ ; strikeout
            $DEFAULT_CHARSET, _ ; the character set
            $OUT_DEFAULT_PRECIS, _ ;  the output precision
            $CLIP_DEFAULT_PRECIS, _ ; the clipping precision
            $DEFAULT_QUALITY, _ ; the output quality
            0, _ ; the pitch and family of the font
            "courier new") ;  typeface name

    _LogMsg("+++: $hFontDC = 0x" & Hex($hFontDC))

    If ($hFontDC <= 0) Then
        $str = "_WinAPI_CreateFont() failed." & @CRLF
        $err = _WinAPI_GetLastError()
        $errm = _WinAPI_GetLastErrorMessage()
        _LogMsg("+++: " & $err & ", 0) - '" & $errm & "'" & @CRLF & $str)
        Exit (9)
    EndIf

    $a__Printer_Font = $hFontDC
EndFunc   ;==>_Printer_MakeFont

Here is the complete script:

#AutoIt3Wrapper_UseUpx=n
#AutoIt3Wrapper_Au3Check_Parameters=-d -w 1 -w 2 -w 3 -w 4 -w 5 -w 6

Opt('MustDeclareVars', 1)

#include <APIDlgConstants.au3>
#include <FontConstants.au3>
#include <WinAPI.au3>

; #VARIABLES# ================================================================
Global $i__LastLineNum = -1, $i__NextLineNum = -1, $i__ThisLineNum = -1
Global $i__LeftMargin_X, $i__TopMargin_Y, $i__PageWidth, $i__PageHeight
Global $i__CurrentPos_X, $i__CurrentPos_Y
Global $i__Printer_Char_H = -1, $i__Printer_Char_W = -1
Global $a__Printer_Font = 0
Global $i__x_start, $i__x_end, $i__y_start, $i__y_end
; ============================================================================

; #CONSTANTS# ================================================================
Global $PHYSICALWIDTH = 110, $PHYSICALHEIGHT = 111
Global $PHYSICALOFFSETX = 112, $PHYSICALOFFSETY = 113
Const $VLINESPACE = 20 ; Number of pixels between lines
Global Const $tagPD = "align 1;DWORD lStructSize;" & "HWND hwndOwner;" & "handle hDevMode;" & "handle hDevNames;" & _
        "handle hDC;" & "DWORD Flags;" & _
        "WORD nFromPage;" & "WORD nToPage;" & "WORD nMinPage;" & "WORD nMaxPage;" & "WORD nCopies;" & _
        "handle hInstance;" & "LPARAM lCustData;" & "ptr lpfnPrintHook;" & "ptr lpfnSetupHook;" & _
        "ptr lpPrintTemplateName;" & "ptr lpSetupTemplateName;" & "handle hPrintTemplate;" & "handle hSetupTemplate"

Global Const $tagDOCINFO = "int   Size;" & "ptr   DocName;" & "ptr   Output;" & "ptr   Datatype;" & "dword Type"
; ============================================================================

_Main()

Func _Main()
    Local $hDC, $str, $str2 = "", $linenum

    $hDC = _Printer_Open(0, Default, "DOCNAME: ++++")
    _LogMsg("+++: $hPrintDc = 0x" & Hex($hDC))
    If (Not $hDC) Then Exit (1)

    _Printer_SetFont($hDC)

    For $y = 1 To 10
        $str2 &= "123456789."
    Next

    $linenum = 30 ; Start in the middle of the page
    For $x = 1 To 15
        $str = "[" & $x & " " & $str2
        _LogMsg("+++: $str ==>" & $str & "<==")
        _Printer_PrintTextLine($hDC, $str, $linenum)
        $linenum += 1
    Next

    _Printer_Close($hDC)

EndFunc   ;==>_Main

Func _Printer_SetFont($hDC)
    Local $hFont

    If ($a__Printer_Font == 0) Then
        _Printer_MakeFont()
    EndIf

    $hFont = $a__Printer_Font
    _LogMsg("+++: $hDC & " & $hDC & ", $hFont = " & $hFont)

    _WinAPI_SetFont($hDC, $hFont) ; <=====================

EndFunc   ;==>_Printer_SetFont

Func _Printer_MakeFont()
    Local $hFontDC, $err, $errm, $str, $flag, $iHeight

    $flag = $FW_BOLD
    $iHeight = 8

    $hFontDC = _WinAPI_CreateFont( _
            $iHeight, _
            0, _ ; average character width
            0, _ ; angle of escape
            0, _ ; base-line orientation
            $flag, _ ; font weight - $FW_NORMAL, $FW_BOLD, etc.
            False, _ ; italic
            False, _ ; underline
            False, _ ; strikeout
            $DEFAULT_CHARSET, _ ; the character set
            $OUT_DEFAULT_PRECIS, _ ;  the output precision
            $CLIP_DEFAULT_PRECIS, _ ; the clipping precision
            $DEFAULT_QUALITY, _ ; the output quality
            0, _ ; the pitch and family of the font
            "courier new") ;  typeface name

    _LogMsg("+++: $hFontDC = 0x" & Hex($hFontDC))

    If ($hFontDC <= 0) Then
        $str = "_WinAPI_CreateFont() failed." & @CRLF
        $err = _WinAPI_GetLastError()
        $errm = _WinAPI_GetLastErrorMessage()
        _LogMsg("+++: " & $err & ", 0) - '" & $errm & "'" & @CRLF & $str)
        Exit (9)
    EndIf

    $a__Printer_Font = $hFontDC
EndFunc   ;==>_Printer_MakeFont

Func _Printer_Open($hGUI = 0, $iFlags = Default, $sDocName = "")
    Local $hDC, $tPD, $err

    If $iFlags = Default Then
        $iFlags = 0
        $iFlags = BitOR($iFlags, $PD_RETURNDC)
        $iFlags = BitOR($iFlags, $PD_USEDEVMODECOPIESANDCOLLATE)
    EndIf

    $tPD = DllStructCreate($tagPD)
    DllStructSetData($tPD, "lStructSize", DllStructGetSize($tPD))
    DllStructSetData($tPD, "hwndOwner", $hGUI) ;

    If $hGUI <> 0 Then
        DllStructGetData($tPD, "hInstance", _WinAPI_GetModuleHandle(""))
    EndIf

    DllStructSetData($tPD, "Flags", $iFlags)
    DllStructSetData($tPD, "nCopies", 2)
    Local $bRet = DllCall("Comdlg32.dll", "int", "PrintDlgW", "ptr", DllStructGetPtr($tPD))
    $err = @error

    If $err Then
        $err = _WinAPI_GetLastError()
        Local $errm = _WinAPI_GetLastErrorMessage()
        _LogMsg("+++: _Printer_Open() returns:  (1, " & $err & ", 0) - '" & $errm & "'")
        $tPD = 0
        Return SetError(1, $err, 0)
    EndIf

    If $bRet[0] = True Then
        $hDC = DllStructGetData($tPD, "hDC")
    Else
        Return SetError(2, $err, 0)
    EndIf

    $tPD = 0

    __Printer_SetupCharWH($hDC)
    _Printer_GetMetrics($hDC)

    _Printer_Startup($hDC, $sDocName)

    Return (SetError(0, 0, $hDC))
EndFunc   ;==>_Printer_Open

Func _Printer_Startup($hDC, $sDocName)
    Local $oDocNameStruct, $DOCINFO, $printJobID, $errstr

    __Printer_SetupCharWH($hDC) ; Get the height and width of a printer character

    $oDocNameStruct = DllStructCreate("char DocName[" & StringLen($sDocName & Chr(0)) & "]")
    DllStructSetData($oDocNameStruct, "DocName", $sDocName & Chr(0)) ; Size of DOCINFO structure
    $DOCINFO = DllStructCreate($tagDOCINFO) ; Structure for Print Document info
    DllStructSetData($DOCINFO, "Size", 20) ; Size of DOCINFO structure
    DllStructSetData($DOCINFO, "DocName", DllStructGetPtr($oDocNameStruct)) ; Set name of print job (Optional)

    _Printer_GetMetrics($hDC)

    $printJobID = _Printer_StartDoc($hDC, $DOCINFO) ; start new print doc

    If ($printJobID <= 0) Then
        $errstr = "_Printer_StartDoc() failed"
        _LogMsg("+++: _Printer_Startup() returns: @error = 1 - " & $errstr)
        Return (SetError(1, 0, $errstr))
    EndIf

    Return (SetError(0, 0, $printJobID)) ; print job ID
EndFunc   ;==>_Printer_Startup

Func _Printer_Close($hDC)
    _Printer_EndPage($hDC) ; End the currend page
    _Printer_EndDoc($hDC) ; End the print job
    _WinAPI_DeleteDC($hDC) ; Delete the printer device context
EndFunc   ;==>_Printer_Close

Func _Printer_EndPage($hDC)
    Local $aResult

    If ($i__ThisLineNum > 1) Then
        $aResult = DllCall("GDI32.dll", "long", "EndPage", "hwnd", $hDC)
    EndIf

    _Printer_SetInitial_XY()

    $i__ThisLineNum = -1

    Return ($aResult[0])
EndFunc   ;==>_Printer_EndPage

Func _Printer_EndDoc($hDC)
    Local $aResult

    $aResult = DllCall("GDI32.dll", "long", "EndDoc", "hwnd", $hDC)

    Return ($aResult[0])
EndFunc   ;==>_Printer_EndDoc

Func _Printer_TextOut($hDC, $iXStart, $iYStart, $sString)
    Local $aResult

    $aResult = DllCall("GDI32.dll", _
            "long", "TextOut", _
            "hwnd", $hDC, _
            "long", $iXStart, _
            "long", $iYStart, _
            "str", $sString, _
            "long", StringLen($sString))

    Return $aResult[0] ; 0 = fail, 1 = OK
EndFunc   ;==>_Printer_TextOut

Func _Printer_PrintTextLine($hDC, $sText, $iLineNumber = -1)
    Local $ret, $lines, $ndx

    If ($iLineNumber <= 0) Then
        $iLineNumber = $i__ThisLineNum
    EndIf

    $sText = StringStripWS($sText, 2) ; Clear trailing whitespace

    ; Break text into an array of lines, based on any of the
    ; usual line endings (@CR, @LF, etc.) found in the string.
    $sText = StringRegExpReplace($sText, "[\\][n]", @CR)

    $sText = StringReplace($sText, @CRLF, @LF)
    $sText = StringReplace($sText, @CR, @LF)
    While (StringRight($sText, 1) == @LF)
        StringTrimRight($sText, 1) ; remove trailing LF's
    WEnd
    $lines = StringSplit($sText, @LF, 2)

    ; Now print each line in the array of lines, advancing the
    ; printer line position each time
    For $ndx = 0 To UBound($lines) - 1
        $i__CurrentPos_X = $i__x_start ;  $i__LeftMargin_X
        $i__CurrentPos_Y = (($i__Printer_Char_H + $VLINESPACE) * $iLineNumber) + $i__y_start

        $ret = _Printer_TextOut($hDC, $i__CurrentPos_X, $i__CurrentPos_Y, $lines[$ndx])

        $iLineNumber += 1
        $i__ThisLineNum += 1

        If ($ret == 0) Then ExitLoop

        If ($iLineNumber > $i__LastLineNum) Then
            _Printer_EndPage($hDC)
            $iLineNumber = 1
            $i__ThisLineNum = 1
        EndIf
    Next

    ; Calculate next x/y position
    $i__CurrentPos_Y = (($i__Printer_Char_H + $VLINESPACE) * $iLineNumber)

    Return (SetError(0, 0, $iLineNumber))

EndFunc   ;==>_Printer_PrintTextLine

Func _Printer_StartDoc($hDC, $tDocInfo)
    Local $aResult

    $aResult = DllCall("GDI32.dll", "long", "StartDoc", "hwnd", $hDC, "ptr", DllStructGetPtr($tDocInfo))

    _Printer_SetInitial_XY()

    Return ($aResult[0]) ; >0 = OK, <=0 = Fail
EndFunc   ;==>_Printer_StartDoc

Func _Printer_GetMetrics($hDC)

    $i__LeftMargin_X = _WinAPI_GetDeviceCaps($hDC, $PHYSICALOFFSETX)
    $i__TopMargin_Y = _WinAPI_GetDeviceCaps($hDC, $PHYSICALOFFSETY)
    $i__PageWidth = _WinAPI_GetDeviceCaps($hDC, $PHYSICALWIDTH)
    $i__PageHeight = _WinAPI_GetDeviceCaps($hDC, $PHYSICALHEIGHT)

#Tidy_Off
    _LogMsg("+++:" & @CRLF _
             & "$PHYSICALOFFSETX [" & $PHYSICALOFFSETX & "] $i__LeftMargin_X = " & $i__LeftMargin_X & @CRLF _
             & "$PHYSICALOFFSETY [" & $PHYSICALOFFSETY & "] $i__TopMargin_Y  = " & $i__TopMargin_Y & @CRLF _
             & "$PHYSICALWIDTH   [" & $PHYSICALWIDTH   & "] $i__PageWidth    = " & $i__PageWidth & @CRLF _
             & "$PHYSICALHEIGHT  [" & $PHYSICALHEIGHT  & "] $i__PageHeight   = " & $i__PageHeight & @CRLF _
            )
#Tidy_On

    $i__x_start = $i__LeftMargin_X - 75
    $i__y_start = $i__TopMargin_Y - 75
    $i__x_end = $i__PageWidth - 250
    $i__y_end = $i__PageHeight - 200

    _Printer_SetInitial_XY()

    $i__LastLineNum = _Printer_GetLastLineNum()
EndFunc   ;==>_Printer_GetMetrics

Func _Printer_SetInitial_XY()

    $i__CurrentPos_X = $i__LeftMargin_X
    $i__CurrentPos_Y = $i__TopMargin_Y * 22
EndFunc   ;==>_Printer_SetInitial_XY

Func _Printer_GetLastLineNum()
    Local $x1, $y, $linenumber

    $linenumber = -1

    If ($i__Printer_Char_H > 0) Then
        For $x1 = 1 To 999
            $y = (($i__Printer_Char_H + $VLINESPACE) * ($x1 + 1))
            If ($y >= $i__y_end) Then
                $linenumber = $x1
                ExitLoop
            EndIf
        Next
    EndIf

    If ($linenumber == -1) Then
        MsgBox(0, "Internal Error", "ERROR: Could not calculate the last line number")
        Exit (1)
    EndIf

    $linenumber -= 1

    Return ($linenumber)
EndFunc   ;==>_Printer_GetLastLineNum

Func __Printer_SetupCharWH($hDC)
    Local $vExtents

    $vExtents = _WinAPI_GetTextExtentPoint32($hDC, "x")
    $i__Printer_Char_W = DllStructGetData($vExtents, "X") ; Get the width of a character
    $i__Printer_Char_H = DllStructGetData($vExtents, "Y") ; Get the height of a character

EndFunc   ;==>__Printer_SetupCharWH

Func _LogMsg($msg, $lnum = @ScriptLineNumber)
    If (StringLeft($msg, 4) = "+++:") Then $msg = StringTrimLeft($msg, 5)
    $msg = StringStripWS($msg, 3)
    ConsoleWrite("+++:" & $lnum & "] " & $msg & @CRLF)
EndFunc   ;==>_LogMsg

Func _Printer_SetFont($hDC)
    Local $hFont

    If ($a__Printer_Font == 0) Then
        _Printer_MakeFont()
    EndIf

    $hFont = $a__Printer_Font
    _LogMsg("+++: $hDC & " & $hDC & ", $hFont = " & $hFont)

    _WinAPI_SetFont($hDC, $hFont) ; <=====================

EndFunc   ;==>_Printer_SetFont

Func _Printer_MakeFont()
    Local $hFontDC, $err, $errm, $str, $flag, $iHeight

    $flag = $FW_BOLD
    $iHeight = 8

    $hFontDC = _WinAPI_CreateFont( _
            $iHeight, _
            0, _ ; average character width
            0, _ ; angle of escape
            0, _ ; base-line orientation
            $flag, _ ; font weight - $FW_NORMAL, $FW_BOLD, etc.
            False, _ ; italic
            False, _ ; underline
            False, _ ; strikeout
            $DEFAULT_CHARSET, _ ; the character set
            $OUT_DEFAULT_PRECIS, _ ;  the output precision
            $CLIP_DEFAULT_PRECIS, _ ; the clipping precision
            $DEFAULT_QUALITY, _ ; the output quality
            0, _ ; the pitch and family of the font
            "courier new") ;  typeface name

    _LogMsg("+++: $hFontDC = 0x" & Hex($hFontDC))

    If ($hFontDC <= 0) Then
        $str = "_WinAPI_CreateFont() failed." & @CRLF
        $err = _WinAPI_GetLastError()
        $errm = _WinAPI_GetLastErrorMessage()
        _LogMsg("+++: " & $err & ", 0) - '" & $errm & "'" & @CRLF & $str)
        Exit (9)
    EndIf

    $a__Printer_Font = $hFontDC
EndFunc   ;==>_Printer_MakeFont

Here is the full script. Run it to see the problem:

funkey · May 22, 2018

You need to use _WinAPI_SelectObject($hDC, $hFont) instead of _WinAPI_SetFont($hDC, $hFont)

AndyS19 · May 23, 2018

I tried this and it printed my text in ''really tiny' font. Could you try running my script (with your changes)?

funkey · May 23, 2018

48 minutes ago, AndyS19 said:

I tried this and it printed my text in ''really tiny' font. Could you try running my script (with your changes)?

Then change font size in _Printer_MakeFont() from 8 to 100 or whatever.

AndyS19 · May 23, 2018

On 5/23/2018 at 1:34 PM, funkey said:

Then change font size in _Printer_MakeFont() from 8 to 100 or whatever.

Setting it to 50 made the print big enough, but not actually a font size of 8. I used this formula to calculate the font height, based on a font size:
$iHeight = $iFontSize * $i__LogPixelsY / 72

And in the actual code:

$i__LogPixelsY = _WinAPI_GetDeviceCaps($hDC, $LOGPIXELSY) ; $LOGPIXELSY = 90

    $ar = DllCall("kernel32.dll", "long", "MulDiv", "long", $iFontSize, "long", $i__LogPixelsY, "long", 72)

    $iHeight = Abs($ar[0])

Edited May 30, 2018 by AndyS19

funkey · May 23, 2018

Why use Abs()? Value should be negative...

AndyS19 · May 30, 2018

Actually, it should always be positive. All of the values in the equation are positive: $LOGPIXELSY = 90, $iFontSize = 10, so 90 * 10 / 72 = 12.5

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