| 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 | #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) |
| 15 | #pragma interface "dc.h" |
| 16 | #endif |
| 17 | |
| 18 | #include "wx/defs.h" |
| 19 | #include "wx/region.h" |
| 20 | |
| 21 | //----------------------------------------------------------------------------- |
| 22 | // classes |
| 23 | //----------------------------------------------------------------------------- |
| 24 | |
| 25 | class WXDLLEXPORT wxDC; |
| 26 | |
| 27 | //----------------------------------------------------------------------------- |
| 28 | // constants |
| 29 | //----------------------------------------------------------------------------- |
| 30 | |
| 31 | #ifndef MM_TEXT |
| 32 | #define MM_TEXT 0 |
| 33 | #define MM_ISOTROPIC 1 |
| 34 | #define MM_ANISOTROPIC 2 |
| 35 | #define MM_LOMETRIC 3 |
| 36 | #define MM_HIMETRIC 4 |
| 37 | #define MM_TWIPS 5 |
| 38 | #define MM_POINTS 6 |
| 39 | #define MM_METRIC 7 |
| 40 | #endif |
| 41 | |
| 42 | //----------------------------------------------------------------------------- |
| 43 | // wxDC |
| 44 | //----------------------------------------------------------------------------- |
| 45 | |
| 46 | |
| 47 | // MGL fwd declarations: |
| 48 | class MGLDevCtx; |
| 49 | class MGLRegion; |
| 50 | struct font_t; |
| 51 | |
| 52 | class WXDLLEXPORT wxDC : public wxDCBase |
| 53 | { |
| 54 | DECLARE_DYNAMIC_CLASS(wxDC) |
| 55 | |
| 56 | public: |
| 57 | wxDC(); |
| 58 | ~wxDC(); |
| 59 | |
| 60 | // implement base class pure virtuals |
| 61 | // ---------------------------------- |
| 62 | |
| 63 | virtual void Clear(); |
| 64 | |
| 65 | virtual bool StartDoc(const wxString& message); |
| 66 | virtual void EndDoc(); |
| 67 | |
| 68 | virtual void StartPage(); |
| 69 | virtual void EndPage(); |
| 70 | |
| 71 | virtual void SetFont(const wxFont& font); |
| 72 | virtual void SetPen(const wxPen& pen); |
| 73 | virtual void SetBrush(const wxBrush& brush); |
| 74 | virtual void SetBackground(const wxBrush& brush); |
| 75 | virtual void SetBackgroundMode(int mode); |
| 76 | virtual void SetPalette(const wxPalette& palette); |
| 77 | |
| 78 | virtual void DestroyClippingRegion(); |
| 79 | |
| 80 | virtual wxCoord GetCharHeight() const; |
| 81 | virtual wxCoord GetCharWidth() const; |
| 82 | virtual void DoGetTextExtent(const wxString& string, |
| 83 | wxCoord *x, wxCoord *y, |
| 84 | wxCoord *descent = NULL, |
| 85 | wxCoord *externalLeading = NULL, |
| 86 | wxFont *theFont = NULL) const; |
| 87 | |
| 88 | virtual bool CanDrawBitmap() const; |
| 89 | virtual bool CanGetTextExtent() const; |
| 90 | virtual int GetDepth() const; |
| 91 | virtual wxSize GetPPI() const; |
| 92 | |
| 93 | virtual void SetMapMode(int mode); |
| 94 | virtual void SetUserScale(double x, double y); |
| 95 | virtual void SetLogicalScale(double x, double y); |
| 96 | virtual void SetLogicalOrigin(wxCoord x, wxCoord y); |
| 97 | virtual void SetDeviceOrigin(wxCoord x, wxCoord y); |
| 98 | virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp); |
| 99 | virtual void SetLogicalFunction(int function); |
| 100 | |
| 101 | // implementation from now on |
| 102 | // -------------------------- |
| 103 | |
| 104 | virtual void ComputeScaleAndOrigin(); |
| 105 | |
| 106 | wxCoord XDEV2LOG(wxCoord x) const |
| 107 | { |
| 108 | wxCoord new_x = x - m_deviceOriginX; |
| 109 | if (new_x > 0) |
| 110 | return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX; |
| 111 | else |
| 112 | return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX; |
| 113 | } |
| 114 | wxCoord XDEV2LOGREL(wxCoord x) const |
| 115 | { |
| 116 | if (x > 0) |
| 117 | return (wxCoord)((double)(x) / m_scaleX + 0.5); |
| 118 | else |
| 119 | return (wxCoord)((double)(x) / m_scaleX - 0.5); |
| 120 | } |
| 121 | wxCoord YDEV2LOG(wxCoord y) const |
| 122 | { |
| 123 | wxCoord new_y = y - m_deviceOriginY; |
| 124 | if (new_y > 0) |
| 125 | return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY; |
| 126 | else |
| 127 | return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY; |
| 128 | } |
| 129 | wxCoord YDEV2LOGREL(wxCoord y) const |
| 130 | { |
| 131 | if (y > 0) |
| 132 | return (wxCoord)((double)(y) / m_scaleY + 0.5); |
| 133 | else |
| 134 | return (wxCoord)((double)(y) / m_scaleY - 0.5); |
| 135 | } |
| 136 | wxCoord XLOG2DEV(wxCoord x) const |
| 137 | { |
| 138 | wxCoord new_x = x - m_logicalOriginX; |
| 139 | if (new_x > 0) |
| 140 | return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX; |
| 141 | else |
| 142 | return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX; |
| 143 | } |
| 144 | wxCoord XLOG2DEVREL(wxCoord x) const |
| 145 | { |
| 146 | if (x > 0) |
| 147 | return (wxCoord)((double)(x) * m_scaleX + 0.5); |
| 148 | else |
| 149 | return (wxCoord)((double)(x) * m_scaleX - 0.5); |
| 150 | } |
| 151 | wxCoord YLOG2DEV(wxCoord y) const |
| 152 | { |
| 153 | wxCoord new_y = y - m_logicalOriginY; |
| 154 | if (new_y > 0) |
| 155 | return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY; |
| 156 | else |
| 157 | return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY; |
| 158 | } |
| 159 | wxCoord YLOG2DEVREL(wxCoord y) const |
| 160 | { |
| 161 | if (y > 0) |
| 162 | return (wxCoord)((double)(y) * m_scaleY + 0.5); |
| 163 | else |
| 164 | return (wxCoord)((double)(y) * m_scaleY - 0.5); |
| 165 | } |
| 166 | |
| 167 | MGLDevCtx *GetMGLDC() const { return m_MGLDC; } |
| 168 | void SetMGLDC(MGLDevCtx *mgldc, bool OwnsMGLDC = false); |
| 169 | |
| 170 | protected: |
| 171 | virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, |
| 172 | int style = wxFLOOD_SURFACE); |
| 173 | |
| 174 | virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const; |
| 175 | |
| 176 | virtual void DoDrawPoint(wxCoord x, wxCoord y); |
| 177 | virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2); |
| 178 | |
| 179 | virtual void DoDrawArc(wxCoord x1, wxCoord y1, |
| 180 | wxCoord x2, wxCoord y2, |
| 181 | wxCoord xc, wxCoord yc); |
| 182 | virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h, |
| 183 | double sa, double ea); |
| 184 | |
| 185 | virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height); |
| 186 | virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y, |
| 187 | wxCoord width, wxCoord height, |
| 188 | double radius); |
| 189 | virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height); |
| 190 | |
| 191 | virtual void DoCrossHair(wxCoord x, wxCoord y); |
| 192 | |
| 193 | virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y); |
| 194 | virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, |
| 195 | bool useMask = false); |
| 196 | |
| 197 | virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y); |
| 198 | virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y, |
| 199 | double angle); |
| 200 | |
| 201 | virtual bool DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height, |
| 202 | wxDC *source, wxCoord xsrc, wxCoord ysrc, |
| 203 | int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = -1, wxCoord ysrcMask = -1); |
| 204 | |
| 205 | // this is gnarly - we can't even call this function DoSetClippingRegion() |
| 206 | // because of virtual function hiding |
| 207 | virtual void DoSetClippingRegionAsRegion(const wxRegion& region); |
| 208 | virtual void DoSetClippingRegion(wxCoord x, wxCoord y, |
| 209 | wxCoord width, wxCoord height); |
| 210 | |
| 211 | virtual void DoGetSize(int *width, int *height) const; |
| 212 | virtual void DoGetSizeMM(int* width, int* height) const; |
| 213 | |
| 214 | virtual void DoDrawLines(int n, wxPoint points[], |
| 215 | wxCoord xoffset, wxCoord yoffset); |
| 216 | virtual void DoDrawPolygon(int n, wxPoint points[], |
| 217 | wxCoord xoffset, wxCoord yoffset, |
| 218 | int fillStyle = wxODDEVEN_RULE); |
| 219 | |
| 220 | // implementation from now on: |
| 221 | |
| 222 | protected: |
| 223 | // setup newly attached MGLDevCtx for wxDC's use |
| 224 | // (does things like setting RGB blending mode for antialiased texts): |
| 225 | void InitializeMGLDC(); |
| 226 | |
| 227 | // common part of DoDrawText() and DoDrawRotatedText() |
| 228 | void DrawAnyText(const wxString& text, wxCoord x, wxCoord y); |
| 229 | |
| 230 | // MGL uses pens as both wxPens and wxBrushes, so we have to |
| 231 | // switch them as needed: |
| 232 | void SelectPen(); |
| 233 | void SelectBrush(); |
| 234 | void SelectMGLStipplePen(int style); |
| 235 | void SelectMGLFatPen(int style, int flag); |
| 236 | |
| 237 | // Select m_font into m_MGLDC: |
| 238 | bool SelectMGLFont(); |
| 239 | |
| 240 | // Convert wxWin logical function to MGL rop: |
| 241 | int LogicalFunctionToMGLRop(int logFunc) const; |
| 242 | |
| 243 | // Unified implementation of DrawIcon, DrawBitmap and Blit: |
| 244 | void DoDrawSubBitmap(const wxBitmap &bmp, |
| 245 | wxCoord x, wxCoord y, wxCoord w, wxCoord h, |
| 246 | wxCoord destx, wxCoord desty, int rop, bool useMask); |
| 247 | |
| 248 | // MGL DC class we use: |
| 249 | MGLDevCtx *m_MGLDC; |
| 250 | bool m_OwnsMGLDC:1; |
| 251 | |
| 252 | // helper variables for SelectXXXX(): |
| 253 | bool m_penSelected; |
| 254 | bool m_brushSelected; |
| 255 | bool m_downloadedPatterns[2]; |
| 256 | |
| 257 | // MGL does not render lines with width>1 with endings centered |
| 258 | // at given coords but with top left corner of the pen at them, |
| 259 | // these offsets are used to correct it. They are computed by |
| 260 | // SelectPen. |
| 261 | int m_penOfsX, m_penOfsY; |
| 262 | |
| 263 | double m_mm_to_pix_x, m_mm_to_pix_y; |
| 264 | |
| 265 | wxPalette m_oldPalette; |
| 266 | |
| 267 | wxRegion m_currentClippingRegion; |
| 268 | wxRegion m_globalClippingRegion; |
| 269 | |
| 270 | // wxDC::Blit handles memoryDCs as special cases :( |
| 271 | bool m_isMemDC; |
| 272 | |
| 273 | font_t *m_mglFont; |
| 274 | }; |
| 275 | |
| 276 | #endif |
| 277 | // _WX_DC_H_ |