include/wx/mgl/dc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dc.h
   3 // Purpose:     wxDC class
   4 // Author:      Vaclav Slavik
   5 // Created:     2001/03/09
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_DC_H_
  12 #define _WX_DC_H_
  13
  14 #include "wx/defs.h"
  15 #include "wx/region.h"
  16
  17 //-----------------------------------------------------------------------------
  18 // classes
  19 //-----------------------------------------------------------------------------
  20
  21 class WXDLLIMPEXP_FWD_CORE wxDC;
  22
  23 //-----------------------------------------------------------------------------
  24 // constants
  25 //-----------------------------------------------------------------------------
  26
  27 #ifndef MM_TEXT
  28 #define MM_TEXT         0
  29 #define MM_ISOTROPIC    1
  30 #define MM_ANISOTROPIC  2
  31 #define MM_LOMETRIC     3
  32 #define MM_HIMETRIC     4
  33 #define MM_TWIPS        5
  34 #define MM_POINTS       6
  35 #define MM_METRIC       7
  36 #endif
  37
  38 //-----------------------------------------------------------------------------
  39 // wxDC
  40 //-----------------------------------------------------------------------------
  41
  42
  43 // MGL fwd declarations:
  44 class MGLDevCtx;
  45 class MGLRegion;
  46 struct font_t;
  47
  48 class WXDLLIMPEXP_CORE wxDC : public wxDCBase
  49 {
  50     DECLARE_DYNAMIC_CLASS(wxDC)
  51
  52 public:
  53     wxDC();
  54     virtual ~wxDC();
  55
  56     // implement base class pure virtuals
  57     // ----------------------------------
  58
  59     virtual void Clear();
  60
  61     virtual bool StartDoc(const wxString& message);
  62     virtual void EndDoc();
  63
  64     virtual void StartPage();
  65     virtual void EndPage();
  66
  67     virtual void SetFont(const wxFont& font);
  68     virtual void SetPen(const wxPen& pen);
  69     virtual void SetBrush(const wxBrush& brush);
  70     virtual void SetBackground(const wxBrush& brush);
  71     virtual void SetBackgroundMode(int mode);
  72     virtual void SetPalette(const wxPalette& palette);
  73
  74     virtual void DestroyClippingRegion();
  75
  76     virtual wxCoord GetCharHeight() const;
  77     virtual wxCoord GetCharWidth() const;
  78     virtual void DoGetTextExtent(const wxString& string,
  79                                  wxCoord *x, wxCoord *y,
  80                                  wxCoord *descent = NULL,
  81                                  wxCoord *externalLeading = NULL,
  82                                  const wxFont *theFont = NULL) const;
  83
  84     virtual bool CanDrawBitmap() const;
  85     virtual bool CanGetTextExtent() const;
  86     virtual int GetDepth() const;
  87     virtual wxSize GetPPI() const;
  88
  89     virtual void SetLogicalFunction(int function);
  90
  91     // implementation from now on
  92     // --------------------------
  93
  94     virtual void ComputeScaleAndOrigin();
  95
  96     wxCoord XDEV2LOG(wxCoord x) const       { return DeviceToLogicalX(x); }
  97     wxCoord XDEV2LOGREL(wxCoord x) const    { return DeviceToLogicalXRel(x); }
  98     wxCoord YDEV2LOG(wxCoord y) const       { return DeviceToLogicalY(y); }
  99     wxCoord YDEV2LOGREL(wxCoord y) const    { return DeviceToLogicalYRel(y); }
 100     wxCoord XLOG2DEV(wxCoord x) const       { return LogicalToDeviceX(x); }
 101     wxCoord XLOG2DEVREL(wxCoord x) const    { return LogicalToDeviceXRel(x); }
 102     wxCoord YLOG2DEV(wxCoord y) const       { return LogicalToDeviceY(y); }
 103     wxCoord YLOG2DEVREL(wxCoord y) const    { return LogicalToDeviceYRel(y); }
 104
 105     MGLDevCtx *GetMGLDC() const { return m_MGLDC; }
 106     void SetMGLDC(MGLDevCtx *mgldc, bool OwnsMGLDC = false);
 107
 108 protected:
 109     virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
 110                              int style = wxFLOOD_SURFACE);
 111
 112     virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const;
 113
 114     virtual void DoDrawPoint(wxCoord x, wxCoord y);
 115     virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2);
 116
 117     virtual void DoDrawArc(wxCoord x1, wxCoord y1,
 118                            wxCoord x2, wxCoord y2,
 119                            wxCoord xc, wxCoord yc);
 120     virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 121                                    double sa, double ea);
 122
 123     virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 124     virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
 125                                         wxCoord width, wxCoord height,
 126                                         double radius);
 127     virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 128
 129     virtual void DoCrossHair(wxCoord x, wxCoord y);
 130
 131     virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y);
 132     virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
 133                               bool useMask = false);
 134
 135     virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y);
 136     virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y,
 137                                    double angle);
 138
 139     virtual bool DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 140                         wxDC *source, wxCoord xsrc, wxCoord ysrc,
 141                         int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = -1, wxCoord ysrcMask = -1);
 142
 143     // this is gnarly - we can't even call this function DoSetClippingRegion()
 144     // because of virtual function hiding
 145     virtual void DoSetClippingRegionAsRegion(const wxRegion& region);
 146     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
 147                                      wxCoord width, wxCoord height);
 148
 149     virtual void DoGetSize(int *width, int *height) const;
 150     virtual void DoGetSizeMM(int* width, int* height) const;
 151
 152     virtual void DoDrawLines(int n, wxPoint points[],
 153                              wxCoord xoffset, wxCoord yoffset);
 154     virtual void DoDrawPolygon(int n, wxPoint points[],
 155                                wxCoord xoffset, wxCoord yoffset,
 156                                int fillStyle = wxODDEVEN_RULE);
 157
 158     // implementation from now on:
 159
 160 protected:
 161     // setup newly attached MGLDevCtx for wxDC's use
 162     // (does things like setting RGB blending mode for antialiased texts):
 163     void InitializeMGLDC();
 164
 165     // common part of DoDrawText() and DoDrawRotatedText()
 166     void DrawAnyText(const wxString& text, wxCoord x, wxCoord y);
 167
 168     // MGL uses pens as both wxPens and wxBrushes, so we have to
 169     // switch them as needed:
 170     void SelectPen();
 171     void SelectBrush();
 172     void SelectMGLStipplePen(int style);
 173     void SelectMGLFatPen(int style, int flag);
 174
 175     // Select m_font into m_MGLDC:
 176     bool SelectMGLFont();
 177
 178     // Convert wxWin logical function to MGL rop:
 179     int LogicalFunctionToMGLRop(int logFunc) const;
 180
 181     // Unified implementation of DrawIcon, DrawBitmap and Blit:
 182     void DoDrawSubBitmap(const wxBitmap &bmp,
 183                          wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 184                          wxCoord destx, wxCoord desty, int rop, bool useMask);
 185
 186     // MGL DC class we use:
 187     MGLDevCtx        *m_MGLDC;
 188     bool              m_OwnsMGLDC:1;
 189
 190     // helper variables for SelectXXXX():
 191     bool              m_penSelected;
 192     bool              m_brushSelected;
 193     bool              m_downloadedPatterns[2];
 194
 195     // MGL does not render lines with width>1 with endings centered
 196     // at given coords but with top left corner of the pen at them,
 197     // these offsets are used to correct it. They are computed by
 198     // SelectPen.
 199     int               m_penOfsX, m_penOfsY;
 200
 201     double            m_mm_to_pix_x, m_mm_to_pix_y;
 202
 203     wxPalette         m_oldPalette;
 204
 205     wxRegion          m_currentClippingRegion;
 206     wxRegion          m_globalClippingRegion;
 207
 208     // wxDC::Blit handles memoryDCs as special cases :(
 209     bool              m_isMemDC;
 210
 211     font_t            *m_mglFont;
 212 };
 213
 214 #endif
 215     // _WX_DC_H_