epsstack.h

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// $Id: epsstack.h 1302 2006-06-12 21:02:01Z alex $
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 */

#ifndef INC_EPSSTACK_H
#define INC_EPSSTACK_H

#include "fixst256.h"
#include "list.h"
#include "doccoord.h"
#include "doccolor.h"

class StringBase;

// Special class for floating point values held as fixed point (would be a typedef except
// we then can't overload INT32s and FIXEDPOINTs).
class FIXEDPOINT
{
public:
    INT32 Long;
    void FromAscii(const TCHAR *FltPtString);
    operator INT32() const { return (INT32) Long; }
    FIXEDPOINT& operator= (INT32 Val) { this->Long = Val; return *this; }
};

// The scaling factor used to store fixed point values on the EPSStack.
const INT32 FixedPointScale = 1000;

// EPSType enumerated type - all the kinds of objects that can be pushed onto the stack
typedef enum
{
    EPSTYPE_EMPTY,
    EPSTYPE_NONE,
    EPSTYPE_INT32,
    EPSTYPE_FIXEDPOINT,
    EPSTYPE_DOUBLE,
    EPSTYPE_STRING,
    EPSTYPE_NAME,
    EPSTYPE_COMMAND
} EPSType;

typedef enum
{
    TINT_NONE,
    TINT_ILLUSTRATOR,
    TINT_COREL
} TintType;

// Forward reference for the EPSStack class
class EPSStackItem;
class EPSFilter;

typedef UINT32 EPSCommand;

/********************************************************************************************

>   class EPSStack : public List

    Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
    Created:    13/10/93
    Purpose:    Provides a heterogeneous stack for use when reading PostScript (EPS) files.
                Graeme (30/5/00) - I've replaced the array implementation that Tim originally
                used with a linked list. The array was originally there as a performance
                tweak, but increased CPU power has made this a less perceiveable gain. By
                using a linked list, I've made the implementation a little more error
                tolerant, which means that files containing stranglely placed bitmaps are
                now loaded.
    SeeAlso:    EPSInputFilter; EPSStackItem

********************************************************************************************/

class EPSStack : public List
{
    CC_DECLARE_MEMDUMP(EPSStack)
    
public:
    EPSStack();
    ~EPSStack();
    
    BOOL Push(const INT32);
    BOOL Push(const FIXEDPOINT);
    BOOL Push(const double);
    BOOL Push(const TCHAR*, BOOL IsName = FALSE);
    BOOL Push(const EPSCommand Cmd);
    
    BOOL Pop(INT32 *);
    BOOL Pop(UINT32 *);
    BOOL Pop(FIXEDPOINT *);
    BOOL Pop(double *);
    BOOL Pop(TCHAR*);
    BOOL Pop(StringBase*);

    BOOL PopCmd(EPSCommand*);
    BOOL PopCoord(INT32*);
    BOOL PopCoordPair(DocCoord*);
    BOOL PopColour(PColourCMYK *, 
                   TintType Tint = TINT_NONE, 
                   FIXEDPOINT *TintVal = NULL,
                   String_64 *pName = NULL);
        // (ChrisG 12/12/00) - Added for EPS support of RGB colours
    BOOL PopColourRGB (INT32 * red, INT32 * green, INT32 * blue,
                       TintType Tint = TINT_NONE, 
                       FIXEDPOINT *TintVal = NULL,
                       String_64 *pName = NULL);
    BOOL PopGrayScale(PColourCMYK *);

    BOOL Pop(Matrix *, BOOL);

    BOOL PopArray(INT32*, INT32*);
    
    BOOL Discard(UINT32 NumToDiscard = 1, BOOL EvenCommands = FALSE);
    BOOL DiscardArray();

    void SetCoordScaleFactor(INT32 NewScaleFactor);
    void SetCoordOrigin(DocCoord NewOrigin);
    void TranslateCoordOrigin(MILLIPOINT dx, MILLIPOINT dy);

    void SetXformMatrix(Matrix&);
    void SetNoXformMatrix();
    
    EPSType GetType();
    EPSCommand ReadCmd();
    
    void Dump(EPSFilter *);

    BOOL IsEmpty();
    
private:
    // Member variables.
    INT32 ScaleFactor;
    DocCoord Origin;

    Matrix XformMatrix;
    BOOL UseXformMatrix;
};

#endif

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