mirror of
https://git.sr.ht/~rabbits/macintosh_cookbook
synced 2024-12-28 01:29:49 +00:00
67 lines
2.1 KiB
ObjectPascal
67 lines
2.1 KiB
ObjectPascal
|
program readPICT;
|
||
|
|
{the following variable must be at the top level}
|
||
|
|
|
||
|
|
var
|
||
|
|
globalRef: INTEGER; {refNum of the file to read from}
|
||
|
|
err: OSErr;
|
||
|
|
|
||
|
|
{the following procedure must be at the top level}
|
||
|
|
|
||
|
|
procedure GetPICTData (dataPtr: Ptr; byteCount: INTEGER);
|
||
|
|
var
|
||
|
|
err: OSErr;
|
||
|
|
longCount: LONGINT;
|
||
|
|
begin
|
||
|
|
longCount := byteCount;
|
||
|
|
err := FSRead(globalRef, longCount, dataPtr);
|
||
|
|
{can't check for an error because we don't know how to handle it}
|
||
|
|
end;
|
||
|
|
|
||
|
|
const
|
||
|
|
abortPICT = 128; {error code if DrawPicture aborted}
|
||
|
|
|
||
|
|
procedure GetDrawPICTFile; {read in a PICT FILE selected by the user}
|
||
|
|
var
|
||
|
|
wher: Point; {where to display dialog}
|
||
|
|
reply: SFReply; {reply record}
|
||
|
|
myFileTypes: SFTypeList; {more Standard FILE goodies}
|
||
|
|
numFileTypes: INTEGER;
|
||
|
|
savedProcs: QDProcsPtr;
|
||
|
|
myProcs: QDProcs; {use CQDProcs for a color window}
|
||
|
|
myPicture: PicHandle; {we need a picture handle for DrawPicture}
|
||
|
|
longCount: LONGINT;
|
||
|
|
myEOF: LONGINT;
|
||
|
|
myFilePos: longint;
|
||
|
|
begin
|
||
|
|
myFilePos := 0;
|
||
|
|
wher.h := 20;
|
||
|
|
wher.v := 20;
|
||
|
|
numFileTypes := 1; {display PICT files}
|
||
|
|
myFileTypes[0] := 'PICT';
|
||
|
|
SFGetFile(wher, '', nil, numFileTypes, nil, nil, reply);
|
||
|
|
if reply.good then
|
||
|
|
begin
|
||
|
|
SetStdProcs(myProcs); {use SetStdCProcs for a CGrafPort}
|
||
|
|
myProcs.getPicProc := @GetPICTData;
|
||
|
|
savedProcs := thePort^.grafProcs; {set the grafProcs to ours}
|
||
|
|
thePort^.grafProcs := @myProcs;
|
||
|
|
myPicture := PicHandle(NewHandle(SizeOf(myPicture)));
|
||
|
|
err := FSOpen(reply.fname, reply.vRefNum, globalRef);
|
||
|
|
err := GetEOF(globalRef, myEOF); {get EOF for later check}
|
||
|
|
err := SetFPos(globalRef, fsFromStart, 512); {skip header}
|
||
|
|
longCount := SizeOf(myPicture);
|
||
|
|
err := FSRead(globalRef, longCount, Ptr(myPicture^));
|
||
|
|
DrawPicture(myPicture, myPicture^^.picFrame); {draw the picture}
|
||
|
|
err := GetFPos(globalRef, myFilePos); {get position for check}
|
||
|
|
err := FSClose(globalRef);
|
||
|
|
DisposHandle(Handle(myPicture));
|
||
|
|
thePort^.grafProcs := savedProcs; {restore the procs}
|
||
|
|
if myFilePos <> myEOF then
|
||
|
|
err := abortPICT;
|
||
|
|
end;
|
||
|
|
end;
|
||
|
|
|
||
|
|
begin
|
||
|
|
|
||
|
|
|
||
|
|
end.
|