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UConvert.p
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UConvert.p
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{Photoshop version 1.0.1, file: UConvert.p
Computer History Museum, www.computerhistory.org
This material is (C)Copyright 1990 Adobe Systems Inc.
It may not be distributed to third parties.
It is licensed for non-commercial use according to
www.computerhistory.org/softwarelicense/photoshop/ }
UNIT UConvert;
INTERFACE
USES
{$LOAD MacIntf.LOAD}
MemTypes, QuickDraw, OSIntf, ToolIntf, PackIntf,
{$LOAD UMacApp.LOAD}
UObject, UList, UMacApp,
{$LOAD UPhotoshop.LOAD}
PaletteMgr, UConstants, UVMemory, UPhotoshop,
{$LOAD}
UDialog, UBWDialog, UCommands, UScreen, USeparation, UProgress;
TYPE
TCvtCommand = OBJECT (TBufferCommand)
fState: ARRAY [BOOLEAN] OF RECORD
fRows : INTEGER;
fCols : INTEGER;
fDepth : INTEGER;
fChannels : INTEGER;
fMode : TDisplayMode;
fStyleInfo: TStyleInfo;
fChannel: INTEGER
END;
PROCEDURE TCvtCommand.ICvtCommand (itsCommand: INTEGER;
view: TImageView);
PROCEDURE TCvtCommand.Free; OVERRIDE;
PROCEDURE TCvtCommand.GetOptions;
PROCEDURE TCvtCommand.DoConversion;
PROCEDURE TCvtCommand.SetState (state: BOOLEAN);
PROCEDURE TCvtCommand.DoIt; OVERRIDE;
PROCEDURE TCvtCommand.UndoIt; OVERRIDE;
PROCEDURE TCvtCommand.RedoIt; OVERRIDE;
END;
TCvtHalftone = OBJECT (TCvtCommand)
fDitherCode: INTEGER;
fInputResolution: Fixed;
fOutputResolution: FixedScaled;
fHalftoneSpec: THalftoneSpec;
PROCEDURE TCvtHalftone.GetOptions; OVERRIDE;
PROCEDURE TCvtHalftone.DoConversion; OVERRIDE;
END;
TCvtMonochrome = OBJECT (TCvtCommand)
fScale: INTEGER;
PROCEDURE TCvtMonochrome.GetOptions1;
PROCEDURE TCvtMonochrome.GetOptions; OVERRIDE;
PROCEDURE TCvtMonochrome.DoConversion; OVERRIDE;
END;
TCvtIndexedColor = OBJECT (TCvtCommand)
fDepth: INTEGER;
fExact: BOOLEAN;
fAdaptive: BOOLEAN;
fDitherCode: INTEGER;
fColorTable: ARRAY [0..255] OF LONGINT;
FUNCTION TCvtIndexedColor.CountColors: INTEGER;
PROCEDURE TCvtIndexedColor.GetOptions1 (colors: INTEGER);
PROCEDURE TCvtIndexedColor.GetOptions; OVERRIDE;
PROCEDURE TCvtIndexedColor.DoExactConversion;
FUNCTION TCvtIndexedColor.BuildInverseTable
(LUT: TRGBLookUpTable): Handle;
PROCEDURE TCvtIndexedColor.DoDiffusion;
FUNCTION TCvtIndexedColor.Find5BitHistogram: Handle;
PROCEDURE TCvtIndexedColor.MedianCut (colors: INTEGER);
FUNCTION TCvtIndexedColor.DoPattern (levels: INTEGER;
output: BOOLEAN): BOOLEAN;
PROCEDURE TCvtIndexedColor.DoApproximateConversion;
PROCEDURE TCvtIndexedColor.DoConversion; OVERRIDE;
END;
TCvtRGBColor = OBJECT (TCvtCommand)
PROCEDURE TCvtRGBColor.DoConversion; OVERRIDE;
END;
TCvtSeparationsCMYK = OBJECT (TCvtCommand)
PROCEDURE TCvtSeparationsCMYK.GetOptions; OVERRIDE;
PROCEDURE TCvtSeparationsCMYK.DoConversion; OVERRIDE;
END;
TCvtSeparationsHSL = OBJECT (TCvtCommand)
PROCEDURE TCvtSeparationsHSL.RealConversion (bright: BOOLEAN);
PROCEDURE TCvtSeparationsHSL.DoConversion; OVERRIDE;
END;
TCvtSeparationsHSB = OBJECT (TCvtSeparationsHSL)
PROCEDURE TCvtSeparationsHSB.DoConversion; OVERRIDE;
END;
TCvtMultichannel = OBJECT (TCvtCommand)
PROCEDURE TCvtMultichannel.DoConversion; OVERRIDE;
END;
TDeleteChannelCommand = OBJECT (TCvtCommand)
PROCEDURE TDeleteChannelCommand.DoConversion; OVERRIDE;
END;
PROCEDURE InitCvtOptions;
FUNCTION DeHalftoneDoc (doc: TImageDocument;
scale: INTEGER;
canAbort: BOOLEAN): TVMArray;
FUNCTION DoConvertCommand (view: TImageView; mode: TDisplayMode): TCommand;
FUNCTION DoDeleteChannel (view: TImageView): TCommand;
IMPLEMENTATION
{$I UAssembly.a.inc}
{$I UConvert.a.inc}
{$I UScreen.a.inc}
CONST
kMaxScale = 16;
VAR
gDitherCode : INTEGER;
gScale : INTEGER;
gCDitherCode : INTEGER;
gAdaptive : BOOLEAN;
gOutputRes : FixedScaled;
PROCEDURE qsort (base: Ptr;
nelem: LONGINT;
elSize: LONGINT;
compar: ProcPtr); C; EXTERNAL;
{*****************************************************************************}
{$S AInit}
PROCEDURE InitCvtOptions;
BEGIN
gDitherCode := 2;
gScale := 1;
gCDitherCode := 2;
gAdaptive := TRUE;
gOutputRes.value := 0
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtCommand.ICvtCommand (itsCommand: INTEGER; view: TImageView);
VAR
fi: FailInfo;
PROCEDURE CleanUp (error: INTEGER; message: LONGINT);
BEGIN
Free
END;
BEGIN
IBufferCommand (itsCommand, view);
CatchFailures (fi, CleanUp);
GetOptions;
Success (fi)
END;
{*****************************************************************************}
{$S ADoCommand}
PROCEDURE TCvtCommand.Free; OVERRIDE;
VAR
j: INTEGER;
k: INTEGER;
BEGIN
FOR j := kMaxChannels - 1 DOWNTO 0 DO
IF fBuffer [j] <> NIL THEN
FOR k := fDoc.fChannels - 1 DOWNTO 0 DO
IF fBuffer [j] = fDoc.fData [k] THEN
fBuffer [j] := NIL;
INHERITED Free
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtCommand.GetOptions;
BEGIN
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtCommand.DoConversion;
BEGIN
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtCommand.SetState (state: BOOLEAN);
VAR
save: TVMArray;
resize: BOOLEAN;
channel: INTEGER;
oldMode: TDisplayMode;
PROCEDURE FixUpView (view: TImageView);
BEGIN
IF state THEN
CASE fDoc.fMode OF
HalftoneMode,
MonochromeMode,
IndexedColorMode:
view.fChannel := 0;
RGBColorMode:
IF oldMode = SeparationsCMYK THEN
IF view.fChannel > 3 THEN
view.fChannel := view.fChannel - 1
ELSE
view.fChannel := kRGBChannels
ELSE IF oldMode = RGBColorMode THEN
BEGIN
IF (fDoc.fChannels = 3) AND (view.fChannel = 3) THEN
view.fChannel := kRGBChannels
END
ELSE
IF view.fChannel <= 2 THEN
view.fChannel := kRGBChannels;
SeparationsCMYK:
IF oldMode = IndexedColorMode THEN
view.fChannel := 3
ELSE IF oldMode = RGBColorMode THEN
IF view.fChannel = kRGBChannels THEN
view.fChannel := 3
ELSE IF view.fChannel >= 3 THEN
view.fChannel := view.fChannel + 1;
SeparationsHSL,
SeparationsHSB:
IF oldMode = IndexedColorMode THEN
view.fChannel := 2
ELSE IF oldMode = RGBColorMode THEN
IF view.fChannel = kRGBChannels THEN
view.fChannel := 2
END
ELSE
view.fChannel := fState [FALSE] . fChannel;
view.ValidateView;
IF resize THEN
BEGIN
view.AdjustExtent;
SetTopLeft (view, 0, 0)
END;
view.ReDither (TRUE);
view.UpdateWindowTitle
END;
BEGIN
fDoc.DeSelect (FALSE);
WITH fState [state] DO
BEGIN
oldMode := fDoc.fMode;
resize := (fDoc.fRows <> fRows) OR (fDoc.fCols <> fCols);
fDoc.fRows := fRows;
fDoc.fCols := fCols;
fDoc.fDepth := fDepth;
fDoc.fChannels := fChannels;
fDoc.fMode := fMode;
fDoc.fStyleInfo := fStyleInfo
END;
FOR channel := 0 TO kMaxChannels - 1 DO
BEGIN
save := fBuffer [channel];
fBuffer [channel] := fDoc.fData [channel];
fDoc.fData [channel] := save
END;
fDoc.fViewList.Each (FixUpView);
fDoc.UpdateStatus;
fDoc.InvalRulers
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtCommand.DoIt; OVERRIDE;
VAR
fi: FailInfo;
PROCEDURE CleanUp (error: INTEGER; message: LONGINT);
BEGIN
FinishProgress
END;
BEGIN
MoveHands (TRUE);
WITH fState [FALSE] DO
BEGIN
fRows := fDoc.fRows;
fCols := fDoc.fCols;
fDepth := fDoc.fDepth;
fChannels := fDoc.fChannels;
fMode := fDoc.fMode;
fStyleInfo := fDoc.fStyleInfo;
fChannel := fView.fChannel
END;
fState [TRUE] := fState [FALSE];
CommandProgress (fCmdNumber);
CatchFailures (fi, CleanUp);
DoConversion;
Success (fi);
CleanUp (0, 0);
SetState (TRUE)
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtCommand.UndoIt; OVERRIDE;
BEGIN
SetState (FALSE)
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtCommand.RedoIt; OVERRIDE;
BEGIN
SetState (TRUE)
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtHalftone.GetOptions; OVERRIDE;
CONST
kDialogID = 1051;
kHookItem = 3;
kInputItem = 4;
kOutputItem = 6;
kFirstDither = 8;
kLastDither = 12;
VAR
fi: FailInfo;
itemBox: Rect;
hitItem: INTEGER;
itemType: INTEGER;
itemHandle: Handle;
spec: THalftoneSpec;
aBWDialog: TBWDialog;
inputUnit: TUnitSelector;
outputUnit: TUnitSelector;
ditherCluster: TRadioCluster;
PROCEDURE CleanUp (error: INTEGER; message: LONGINT);
BEGIN
aBWDialog.Free
END;
BEGIN
NEW (aBWDialog);
FailNil (aBWDialog);
aBWDialog.IBWDialog (kDialogID, kHookItem, ok);
CatchFailures (fi, CleanUp);
IF gOutputRes.value = 0 THEN
gOutputRes.scale := fDoc.fStyleInfo.fResolution.scale;
inputUnit := aBWDialog.DefineResUnit
(kInputItem, fDoc.fStyleInfo.fResolution.scale, 0);
outputUnit := aBWDialog.DefineResUnit
(kOutputItem, gOutputRes.scale, 0);
inputUnit.StuffFixed (0, fDoc.fStyleInfo.fResolution.value);
IF gOutputRes.value = 0 THEN
outputUnit.StuffFixed (0, fDoc.fStyleInfo.fResolution.value)
ELSE
outputUnit.StuffFixed (0, gOutputRes.value);
aBWDialog.SetEditSelection (kOutputItem);
IF EmptyRect (gPatternRect) AND (gDitherCode = 4) THEN
gDitherCode := 2;
ditherCluster := aBWDialog.DefineRadioCluster
(kFirstDither, kLastDither, kFirstDither + gDitherCode);
IF EmptyRect (gPatternRect) THEN
BEGIN
GetDItem (aBWDialog.fDialogPtr, kLastDither,
itemType, itemHandle, itemBox);
HiliteControl (ControlHandle (itemHandle), 255)
END;
aBWDialog.TalkToUser (hitItem, StdItemHandling);
IF hitItem <> ok THEN Failure (0, 0);
fInputResolution := inputUnit.GetFixed (0);
fOutputResolution.value := outputUnit.GetFixed (0);
fOutputResolution.scale := outputUnit.fPick;
IF fInputResolution = fOutputResolution.value THEN
gOutputRes.value := 0
ELSE
gOutputRes := fOutputResolution;
fDitherCode := ditherCluster.fChosenItem - kFirstDither;
gDitherCode := fDitherCode;
Success (fi);
CleanUp (0, 0);
IF fDitherCode = 3 THEN
BEGIN
spec := fDoc.fStyleInfo.fHalftoneSpec;
SetHalftoneScreen (spec, FALSE);
fHalftoneSpec := spec
END
END;
{*****************************************************************************}
{$S ADoConvert}
FUNCTION CustomScreen: TVMArray;
VAR
fi: FailInfo;
gray: INTEGER;
this: LONGINT;
left: LONGINT;
count: LONGINT;
hist: THistogram;
map: TLookUpTable;
aVMArray: TVMArray;
PROCEDURE CleanUp (error: INTEGER; message: LONGINT);
BEGIN
FreeObject (aVMArray)
END;
BEGIN
IF EmptyRect (gPatternRect) THEN Failure (errNoPattern, 0);
aVMArray := gPattern [0] . CopyRect (gPatternRect, 1);
CatchFailures (fi, CleanUp);
aVMArray.HistBytes (hist);
count := aVMArray.fLogicalSize * ORD4 (aVMArray.fBlockCount);
left := 0;
FOR gray := 0 TO 255 DO
BEGIN
this := hist [gray];
map [gray] := CHR (Min (254, TRUNC (255 * (left + this / 2) / count)));
left := left + this
END;
aVMArray.MapBytes (map);
Success (fi);
CustomScreen := aVMArray
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtHalftone.DoConversion; OVERRIDE;
VAR
r: Rect;
fi: FailInfo;
limit: INTEGER;
scale: EXTENDED;
screen: TVMArray;
newRows: INTEGER;
newCols: INTEGER;
cellData: Handle;
cellSize: INTEGER;
aVMArray: TVMArray;
spec: THalftoneSpec;
PROCEDURE CleanUp (error: INTEGER; message: LONGINT);
BEGIN
FreeObject (screen)
END;
BEGIN
scale := fOutputResolution.value / fInputResolution;
newRows := Max (1, Min (kMaxCoord, ROUND (fDoc.fRows * scale)));
newCols := Max (1, Min (kMaxCoord, ROUND (fDoc.fCols * scale)));
fState [TRUE] . fMode := HalftoneMode;
fState [TRUE] . fRows := newRows;
fState [TRUE] . fCols := newCols;
fState [TRUE] . fDepth := 1;
fState [TRUE] . fStyleInfo . fResolution := fOutputResolution;
aVMArray := NewVMArray (newRows, BSL (BSR (newCols + 15, 4), 1), 1);
fBuffer [0] := aVMArray;
CASE fDitherCode OF
0, 1:
BEGIN
spec.frequency.value := $10000;
spec.frequency.scale := 1;
spec.angle := 0;
spec.shape := 0;
spec.spot := NIL;
IF fDitherCode = 0 THEN
limit := 1
ELSE
limit := 8;
MakeScreen (limit, $10000, spec, cellData, cellSize);
screen := ConvertScreen (cellData, cellSize)
END;
2: screen := NIL;
3: BEGIN
spec := fHalftoneSpec;
MakeScreen (kMaxCellSize,
fOutputResolution.value,
spec,
cellData,
cellSize);
screen := ConvertScreen (cellData, cellSize)
END;
4: screen := CustomScreen
END;
CatchFailures (fi, CleanUp);
SetRect (r, 0, 0, fDoc.fCols, fDoc.fRows);
HalftoneArea (fDoc.fData [0],
aVMArray,
r,
newRows,
newCols,
NIL,
screen,
TRUE);
Success (fi);
CleanUp (0, 0)
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtMonochrome.GetOptions1;
CONST
kDialogID = 1052;
kHookItem = 3;
kEditItem = 4;
VAR
fi: FailInfo;
hitItem: INTEGER;
maxScale: INTEGER;
aBWDialog: TBWDialog;
scaleText: TFixedText;
PROCEDURE CleanUp (error: INTEGER; message: LONGINT);
BEGIN
aBWDialog.Free
END;
BEGIN
NEW (aBWDialog);
FailNil (aBWDialog);
aBWDialog.IBWDialog (kDialogID, kHookItem, ok);
CatchFailures (fi, CleanUp);
maxScale := Min (kMaxScale, Min (fDoc.fRows, fDoc.fCols));
scaleText := aBWDialog.DefineFixedText
(kEditItem, 0, FALSE, TRUE, 1, maxScale);
scaleText.StuffValue (Min (maxScale, gScale));
aBWDialog.SetEditSelection (kEditItem);
aBWDialog.TalkToUser (hitItem, StdItemHandling);
IF hitItem <> ok THEN Failure (0, 0);
fScale := scaleText.fValue;
gScale := fScale;
Success (fi);
CleanUp (0, 0)
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtMonochrome.GetOptions; OVERRIDE;
CONST
kDiscardColorQuestion = 907;
kDiscardOtherQuestion = 908;
kDiscardOthersQuestion = 909;
PROCEDURE Confirm (question: INTEGER);
BEGIN
IF BWAlert (question, 0, FALSE) <> ok THEN
Failure (0, 0)
END;
BEGIN
CASE fDoc.fMode OF
HalftoneMode:
GetOptions1;
IndexedColorMode:
IF NOT EqualBytes (@gNullLUT, @fDoc.fIndexedColorTable.R, 256) OR
NOT EqualBytes (@gNullLUT, @fDoc.fIndexedColorTable.G, 256) OR
NOT EqualBytes (@gNullLUT, @fDoc.fIndexedColorTable.B, 256) THEN
Confirm (kDiscardColorQuestion);
OTHERWISE
IF fView.fChannel = kRGBChannels THEN
Confirm (kDiscardColorQuestion)
ELSE IF fDoc.fChannels = 2 THEN
Confirm (kDiscardOtherQuestion)
ELSE
Confirm (kDiscardOthersQuestion)
END
END;
{*****************************************************************************}
{$S ARes3}
FUNCTION DeHalftoneDoc (doc: TImageDocument;
scale: INTEGER;
canAbort: BOOLEAN): TVMArray;
VAR
srcPtr: Ptr;
dstPtr: Ptr;
fi: FailInfo;
row: INTEGER;
gray: INTEGER;
total: INTEGER;
newRows: INTEGER;
newCols: INTEGER;
aVMArray: TVMArray;
thresTable: TThresTable;
PROCEDURE CleanUp (error: INTEGER; message: LONGINT);
BEGIN
FreeObject (aVMArray);
doc.fData [0] . Flush
END;
BEGIN
newRows := doc.fRows DIV scale;
newCols := doc.fCols DIV scale;
aVMArray := NewVMArray (newRows, newCols, 1);
CatchFailures (fi, CleanUp);
total := SQR (scale);
FOR gray := 0 TO total DO
thresTable [gray] := CHR (255 - (255 * ORD4 (gray) +
total DIV 2) DIV total);
FOR row := 0 TO newRows - 1 DO
BEGIN
MoveHands (canAbort);
UpdateProgress (row, newRows);
dstPtr := aVMArray.NeedPtr (row, row, TRUE);
srcPtr := doc.fData [0] . NeedPtr (row * scale,
row * scale + scale - 1,
FALSE);
DeHalftoneRow (srcPtr,
dstPtr,
doc.fData [0] . fPhysicalSize,
newCols,
scale,
thresTable);
doc.fData [0] . DoneWithPtr;
aVMArray.DoneWithPtr
END;
UpdateProgress (1, 1);
Success (fi);
doc.fData [0] . Flush;
aVMArray.Flush;
DeHalftoneDoc := aVMArray
END;
{*****************************************************************************}
{$S ADoConvert}
PROCEDURE TCvtMonochrome.DoConversion; OVERRIDE;
VAR
gray: INTEGER;
map: TLookUpTable;
aVMArray: TVMArray;
BEGIN
fState [TRUE] . fMode := MonochromeMode;
fState [TRUE] . fChannels := 1;
CASE fDoc.fMode OF
HalftoneMode:
BEGIN
aVMArray := DeHalftoneDoc (fDoc, fScale, TRUE);
fBuffer [0] := aVMArray;
fState [TRUE] . fRows := aVMArray.fBlockCount;
fState [TRUE] . fCols := aVMArray.fLogicalSize;
fState [TRUE] . fDepth := 8;
fState [TRUE] . fStyleInfo.fResolution.value :=
Max (1, fDoc.fStyleInfo.fResolution.value DIV fScale)
END;
IndexedColorMode:
BEGIN
aVMArray := fDoc.fData [0] . CopyArray (1);
fBuffer [0] := aVMArray;
FOR gray := 0 TO 255 DO
map [gray] := ConvertToGray
(fDoc.fIndexedColorTable.R [gray],
fDoc.fIndexedColorTable.G [gray],
fDoc.fIndexedColorTable.B [gray]);
aVMArray . MapBytes (map)
END;
OTHERWISE
IF fView.fChannel = kRGBChannels THEN
BEGIN
aVMArray := MakeMonochromeArray (fDoc.fData [0],
fDoc.fData [1],
fDoc.fData [2]);
fBuffer [0] := aVMArray
END
ELSE
fBuffer [0] := fDoc.fData [fView.fChannel]
END
END;
{*****************************************************************************}
{$S ADoConvert}
FUNCTION TCvtIndexedColor.CountColors: INTEGER;
VAR
rPtr: Ptr;
gPtr: Ptr;
bPtr: Ptr;
fi: FailInfo;
row: INTEGER;
index: INTEGER;
colors: INTEGER;
PROCEDURE CleanUp (error: INTEGER; message: LONGINT);
BEGIN
IF rPtr <> NIL THEN fDoc.fData [0] . DoneWithPtr;
IF gPtr <> NIL THEN fDoc.fData [1] . DoneWithPtr;
IF bPtr <> NIL THEN fDoc.fData [2] . DoneWithPtr;
fDoc.fData [0] . Flush;
fDoc.fData [1] . Flush;
fDoc.fData [2] . Flush;
HUnlock (Handle (SELF))
END;
BEGIN
rPtr := NIL;
gPtr := NIL;
bPtr := NIL;
HLock (Handle (SELF));
CatchFailures (fi, CleanUp);
DoSetBytes (@fColorTable, 1024, 0);