psdc.h

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// $Id: psdc.h 1354 2006-06-23 20:23:25Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
       Copyright on certain contributions may be held in joint with their
              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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Franklin St, Fifth Floor, Boston, MA  02110-1301 USA


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-----------------

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=================================XARAHEADEREND============================
 */

// Device context used for printing to PostScript devices.

#ifndef INC_PSDC
#define INC_PSDC

#include "kerneldc.h"
//#include "wincoord.h" - in camtypes.h [AUTOMATICALLY REMOVED]

// Size of buffer used to xfer PostScript data to device.
#define MAX_PSBUF (512)

class PrintPSRenderRegion;

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

>   class PassThruBuffer

    Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
    Created:    04/24/95
    Purpose:    A simple structure for passing data to PostScript devices under Windows.
                It holds the number of bytes in the buffer followed by the data.
                (See SDK/MFC docs for Escape() function)
    SeeAlso:    PSPrintDC

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

class PassThruBuffer
{
public:
    INT32 nCount;
    TCHAR  Data[MAX_PSBUF + 1];
    char   CharData[MAX_PSBUF+1];
};

// Used for rendering text via GDI
// (It is a simple cache system).
class PSDCFontInfo
{
public:
    PSDCFontInfo();

public:
    WORD Typeface;
    BOOL Bold;
    BOOL Italic;
    MILLIPOINT Width;
    MILLIPOINT Height;
    ANGLE Rotation;
    wxFont * pRenderFont;
    wxFont * pOldFont;
};

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

>   class PSPrintDC : public KernelDC

    Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/03/94
    Purpose:    Provide a device context for printing to a PostScript printer.
    SeeAlso:    KernelDC; PSPrintRenderRegion

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

class PSPrintDC : public KernelDC
{
    CC_DECLARE_DYNAMIC(PSPrintDC)
public:
    PSPrintDC(CNativeDC *pDC);
    ~PSPrintDC();

    // Functions to do the actual output to the PostScript printer.
    virtual BOOL OutputNewLine();
    virtual BOOL OutputToken(TCHAR*);
    virtual BOOL OutputDirect(BYTE *, INT32);

    // Handles the change of co-ordinate system that GDI introduces to PS devices.
    virtual BOOL OutputCoord(DocCoord&, EPSAccuracy Accuracy = ACCURACY_NORMAL);
    virtual BOOL OutputUserSpaceValue(MILLIPOINT, EPSAccuracy Accuracy = ACCURACY_NORMAL);

    void SetDCTransforms(Matrix RenderMatrix, View *pView);
    WinCoord TransformCoord(const DocCoord&);

    void AttachRenderRegion(PrintPSRenderRegion *pRegion)
        {   pPSRegion = pRegion;   }
    void DetachRenderRegion() { pPSRegion = NULL; }

    // Function to call when using OS functions to render.
    BOOL StartOSOutput();
    BOOL EndOSOutput();

    // Function to call when printing is finished
    BOOL FlushDC();

    // Flushes pending PostScript output to device.
    BOOL FlushPSBuffer();

    BOOL SelectNewFont(WORD Typeface, BOOL Bold, BOOL Italic, 
                       MILLIPOINT Width, MILLIPOINT Height, ANGLE Rotation);

    // Functions to setup the use of a Postscript clipping rectangle
    BOOL SetClipping(BOOL NewState);
    BOOL OutputPSClipping();

protected:

    BOOL MakeRoomInBuffer(INT32);
    void WritePSchar(char * pBuf, INT32 nBytes);
    void WritePSTCHAR(TCHAR * pBuf, INT32 nBytes);
    
    // Used for pending output.
    PassThruBuffer Buffer;

    // The transforms to use when outputting user space values.
    // The matrix is used for co-ordinates; the FIXED16 is used to convert distances
    // (e.g. linewidths).
    Matrix RenderMatrix;
    MILLIPOINT PixelSize;
    View *pView;

    // If zero, then it is not safe to do GDI output; if non-zero then it is.
    INT32 SafeToUseGDI;

    // Initialised to true on contruction of this DC. It will be set to FALSE as
    // soon as we attempt to output a token. We can use this to control once only
    // startofpage output data such as DSC comments.
    BOOL StartOfPage;

    // If TRUE, then the current PS context is the one set up by GDI, otherwise it is the
    // context used by Camelot.
    BOOL GDIContextIsCurrent;

    // Specifies whether to output the current clipping region to Postscript in order to
    // clip our PostScript graphics output. This defaults to TRUE.
    BOOL UsePSLevelClipping;

    // Used to cache GDI fonts.
    PSDCFontInfo FontInfo;

    // Used for outputing postscript header.
    PrintPSRenderRegion *pPSRegion;
};



#endif  // INC_PSDC

---