mab@ecmwf.co.uk (Baudouin Raoult) (04/24/91)
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;
--
---------------------------------------------------
Baudouin Raoult.
European Center for Medium Range Weather Forecast
Reading, UK
---------------------------------------------------kaufman@neon.Stanford.EDU (Marc T. Kaufman) (04/27/91)
In article <1991Apr24.090146.15878@ecmwf.co.uk> mab@ecmwf.co.uk (Baudouin Raoult) writes: > 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). Yes, you can give back the kind of port you want. But since there are more bytes in a TPrPort+CQDProcs than in a TPrPort its probably best to ignore any TPrPort space given to you by the application and just return your own. I only know of one (1) application that even tried to give me port space. > Can you print using color QD ???? Certainly. After all, its YOUR driver... and your bottlenecks. Marc Kaufman (kaufman@Neon.stanford.edu)