src/os2/dcmemory.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcmemory.cpp
   3 // Purpose:     wxMemoryDC class
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     10/14/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Webster
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifndef WX_PRECOMP
  16 #include "wx/utils.h"
  17 #endif
  18
  19 #include "wx/os2/private.h"
  20
  21 #include "wx/dcmemory.h"
  22
  23 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)
  24
  25 /////////////////////////////////////////////////////////////////////////////
  26 // Memory DC
  27 /////////////////////////////////////////////////////////////////////////////
  28
  29 wxMemoryDC::wxMemoryDC(void)
  30 {
  31     ERRORID                         vError;
  32     wxString                        sError;
  33     HDC                             hDC;
  34     HPS                             hPS;
  35     DEVOPENSTRUC                    vDOP = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
  36     SIZEL                           vSize = {0, 0};
  37
  38     //
  39     // Create a memory device context
  40     //
  41     hDC = ::DevOpenDC(vHabmain, OD_MEMORY, "*", 5L, (PDEVOPENDATA)&vDOP, NULLHANDLE);
  42     if (hDC != DEV_ERROR)
  43     {
  44         hPS = ::GpiCreatePS(vHabmain, hDC, &vSize, PU_PELS | GPIT_MICRO | GPIA_ASSOC);
  45         if (hPS != GPI_ERROR)
  46         {
  47             m_hPS = hPS;
  48             m_hDC = hDC;
  49             m_ok = TRUE;
  50             m_bOwnsDC = TRUE;
  51             SetBrush(*wxWHITE_BRUSH);
  52             SetPen(*wxBLACK_PEN);
  53             if (!::GpiCreateLogColorTable( m_hPS
  54                                           ,0L
  55                                           ,LCOLF_CONSECRGB
  56                                           ,0L
  57                                           ,(LONG)wxTheColourDatabase->m_nSize
  58                                           ,(PLONG)wxTheColourDatabase->m_palTable
  59                                          ))
  60             {
  61                 vError = ::WinGetLastError(vHabmain);
  62                 sError = wxPMErrorToStr(vError);
  63                 wxLogError("Unable to set current color table. Error: %s\n", sError);
  64             }
  65             //
  66             // Set the color table to RGB mode
  67             //
  68             if (!::GpiCreateLogColorTable( m_hPS
  69                                           ,0L
  70                                           ,LCOLF_RGB
  71                                           ,0L
  72                                           ,0L
  73                                           ,NULL
  74                                          ))
  75             {
  76                 vError = ::WinGetLastError(vHabmain);
  77                 sError = wxPMErrorToStr(vError);
  78                 wxLogError("Unable to set current color table. Error: %s\n", sError);
  79             }
  80         }
  81         else
  82         {
  83             m_hPS = NULLHANDLE;
  84             m_hDC = NULLHANDLE;
  85             m_ok  = FALSE;
  86             m_bOwnsDC = FALSE;
  87         }
  88     }
  89     else
  90     {
  91         m_hPS = NULLHANDLE;
  92         m_hDC = NULLHANDLE;
  93         m_ok  = FALSE;
  94         m_bOwnsDC = FALSE;
  95     }
  96 } // end of wxMemoryDC::wxMemoryDC
  97
  98 wxMemoryDC::wxMemoryDC(
  99   wxDC*                             pOldDC
 100 )
 101 {
 102     HDC                             hDC;
 103     HPS                             hPS;
 104     DEVOPENSTRUC                    vDOP = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
 105     SIZEL                           vSize = {0, 0};
 106
 107     pOldDC->BeginDrawing();
 108
 109     //
 110     // Create a memory device context
 111     //
 112     hDC = ::DevOpenDC(vHabmain, OD_MEMORY, "*", 5L, (PDEVOPENDATA)&vDOP, GetHdcOf(*pOldDC));
 113     if (hDC != DEV_ERROR)
 114     {
 115         hPS = ::GpiCreatePS(vHabmain, hDC, &vSize, PU_PELS | GPIT_MICRO | GPIA_ASSOC);
 116         if (hPS != GPI_ERROR)
 117         {
 118             m_hPS = hPS;
 119             m_hDC = hDC;
 120             m_ok = TRUE;
 121             m_bOwnsDC = TRUE;
 122             pOldDC->EndDrawing();
 123             SetBrush(*wxWHITE_BRUSH);
 124             SetPen(*wxBLACK_PEN);
 125         }
 126         else
 127         {
 128             pOldDC->EndDrawing();
 129             m_hPS = NULLHANDLE;
 130             m_hDC = NULLHANDLE;
 131             m_ok  = FALSE;
 132             m_bOwnsDC = FALSE;
 133         }
 134     }
 135     else
 136     {
 137         pOldDC->EndDrawing();
 138         m_hPS = NULLHANDLE;
 139         m_hDC = NULLHANDLE;
 140         m_ok  = FALSE;
 141         m_bOwnsDC = FALSE;
 142     }
 143 } // end of wxMemoryDC::wxMemoryDC
 144
 145 wxMemoryDC::~wxMemoryDC()
 146 {
 147     if (m_hPS != NULLHANDLE)
 148         ::GpiDestroyPS(m_hPS);
 149     if (m_hDC != NULLHANDLE)
 150         ::DevCloseDC(m_hDC);
 151 } // end of wxMemoryDC::~wxMemoryDC
 152
 153 void wxMemoryDC::SelectObject(
 154   const wxBitmap&                   rBitmap
 155 )
 156 {
 157     //
 158     // Select old bitmap out of the device context
 159     //
 160     if (m_hOldBitmap)
 161     {
 162         ::GpiSetBitmap(m_hPS, NULLHANDLE);
 163         if (m_vSelectedBitmap.Ok())
 164         {
 165             m_vSelectedBitmap.SetSelectedInto(NULL);
 166             m_vSelectedBitmap = wxNullBitmap;
 167         }
 168     }
 169
 170     //
 171     // Check for whether the bitmap is already selected into a device context
 172     //
 173     wxCHECK_RET( !rBitmap.GetSelectedInto() ||
 174                  (rBitmap.GetSelectedInto() == this),
 175                  wxT("Bitmap is selected in another wxMemoryDC, delete the first wxMemoryDC or use SelectObject(NULL)") );
 176
 177     m_vSelectedBitmap = rBitmap;
 178
 179     WXHBITMAP                       hBmp = m_vSelectedBitmap.GetHBITMAP();
 180
 181     if (!hBmp)
 182         return;
 183
 184     m_vSelectedBitmap.SetSelectedInto(this);
 185     hBmp = (WXHBITMAP)::GpiSetBitmap(m_hPS, (HBITMAP)hBmp);
 186
 187     if (hBmp == HBM_ERROR)
 188     {
 189         wxLogLastError(wxT("SelectObject(memDC, bitmap)"));
 190         wxFAIL_MSG(wxT("Couldn't select a bitmap into wxMemoryDC"));
 191     }
 192     else if (!m_hOldBitmap)
 193     {
 194         m_hOldBitmap = hBmp;
 195     }
 196 } // end of wxMemoryDC::SelectObject
 197
 198 void wxMemoryDC::DoGetSize(
 199   int*                              pWidth
 200 , int*                              pHeight
 201 ) const
 202 {
 203     if (!m_vSelectedBitmap.Ok())
 204     {
 205         *pWidth  = 0;
 206         *pHeight = 0;
 207         return;
 208     }
 209     *pWidth = m_vSelectedBitmap.GetWidth();
 210     *pHeight = m_vSelectedBitmap.GetHeight();
 211 } // end of wxMemoryDC::DoGetSize
 212
 213