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From: mab@ecmwf.co.uk (Baudouin Raoult)
Newsgroups: comp.sys.mac.programmer
Subject: Color TPrPort ?
Message-ID: <1991Apr24.090146.15878@ecmwf.co.uk>
Date: 24 Apr 91 09:01:46 GMT
Sender: usenet@ecmwf.co.uk (NEWS deafult user)
Reply-To: mab@ecmwf.co.uk (Baudouin Raoult)
Organization: ECMWF
Lines: 51


  I am writing a printer driver, and I'd like to know
if it is possible to create a Color TPrPort. 
In a printer driver, you allocate a TPrPort, which starts 
with a GrafPort, and give it to the application. 
The application then just draws into this port.
But a GrafPort (b & w) is not a CGrafPort (color) and
QDProcs ( b & w ) are not CQDProcs (color).

	Can you print using color QD ????

-- This is the definition of the TPrPort

TPrPort = RECORD {This is the "PrPeek" record.}
            GPort: GrafPort; {The Printer's graf port.}
            GProcs: QDProcs; {..and its procs}
            lGParam1: LongInt; {16 bytes for private parameter storage.}
            lGParam2: LongInt;
            lGParam3: LongInt;
            lGParam4: LongInt;

            fOurPtr: Boolean; {Whether the PrPort allocation was done by
                                 us.}
            fOurBits: Boolean; {Whether the BitMap allocation was done by
                                  us.}
          END;

--- This is how it must be for color.
 
TPrPort = RECORD {This is the "PrPeek" record.}
            GPort: CGrafPort; {The Printer's COLOR graf port.}
            GProcs: CQDProcs; {..and its COLOR procs}
            lGParam1: LongInt; {16 bytes for private parameter storage.}
            lGParam2: LongInt;
            lGParam3: LongInt;
            lGParam4: LongInt;
            fOurPtr: Boolean; {Whether the PrPort allocation was done by
                                 us.}
            fOurBits: Boolean; {Whether the BitMap allocation was done by
                                  us.}
            END;



-- 

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Baudouin Raoult. 
European Center for Medium Range Weather Forecast
Reading, UK
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