src/os2/dcmemory.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/os2/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 #include "wx/dcmemory.h"
  16 #include "wx/os2/dcmemory.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/utils.h"
  20     #include "wx/app.h"
  21     #include "wx/log.h"
  22 #endif
  23
  24 #include "wx/os2/private.h"
  25
  26 IMPLEMENT_ABSTRACT_CLASS(wxMemoryDCImpl, wxPMDCImpl)
  27
  28 /////////////////////////////////////////////////////////////////////////////
  29 // Memory DC
  30 /////////////////////////////////////////////////////////////////////////////
  31
  32 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner )
  33         : wxPMDCImpl( owner )
  34 {
  35     CreateCompatible(NULL);
  36     Init();
  37 }
  38
  39 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxBitmap& bitmap )
  40         : wxPMDCImpl( owner )
  41 {
  42     CreateCompatible(NULL);
  43     Init();
  44     DoSelect(bitmap);
  45 }
  46
  47 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxDC *pOldDC)
  48         : wxPMDCImpl( owner )
  49 {
  50     wxCHECK_RET( pOldDC, _T("NULL dc in wxMemoryDC ctor") );
  51
  52     CreateCompatible(pOldDC);
  53     Init();
  54 } // end of wxMemoryDC::wxMemoryDC
  55
  56 void wxMemoryDCImpl::Init()
  57 {
  58     if (m_ok)
  59     {
  60         SetBrush(*wxWHITE_BRUSH);
  61         SetPen(*wxBLACK_PEN);
  62
  63         // the background mode is only used for text background and is set in
  64         // DrawText() to OPAQUE as required, otherwise always TRANSPARENT
  65         ::GpiSetBackMix( GetHPS(), BM_LEAVEALONE );
  66     }
  67     memset(&m_vRclPaint, 0, sizeof(m_vRclPaint));
  68 } // end of wxMemoryDC::Init
  69
  70 bool wxMemoryDCImpl::CreateCompatible( wxDC* WXUNUSED(pDC) )
  71 {
  72     HDC           hDC;
  73     HPS           hPS;
  74     DEVOPENSTRUC  vDOP = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
  75     SIZEL         vSize = {0, 0};
  76
  77     //
  78     // Create a memory device context
  79     //
  80     hDC = ::DevOpenDC(vHabmain, OD_MEMORY, "*", 5L, (PDEVOPENDATA)&vDOP, NULLHANDLE);
  81     if (hDC != DEV_ERROR)
  82     {
  83         hPS = ::GpiCreatePS(vHabmain, hDC, &vSize, PU_PELS | GPIT_MICRO | GPIA_ASSOC);
  84         if (hPS != GPI_ERROR)
  85         {
  86             m_hPS = hPS;
  87             m_hDC = hDC;
  88             m_ok = true;
  89             m_bOwnsDC = true;
  90             //
  91             // Set the wxWidgets color table
  92             //
  93             ::GpiCreateLogColorTable( m_hPS
  94                                      ,0L
  95                                      ,LCOLF_CONSECRGB
  96                                      ,0L
  97                                      ,(LONG)wxTheColourDatabase->m_nSize
  98                                      ,(PLONG)wxTheColourDatabase->m_palTable
  99                                     );
 100             ::GpiCreateLogColorTable( m_hPS
 101                                      ,0L
 102                                      ,LCOLF_RGB
 103                                      ,0L
 104                                      ,0L
 105                                      ,NULL
 106                                     );
 107         }
 108         else
 109         {
 110             m_hPS = NULLHANDLE;
 111             m_hDC = NULLHANDLE;
 112             m_ok  = false;
 113             m_bOwnsDC = false;
 114         }
 115     }
 116     else
 117     {
 118         m_hPS = NULLHANDLE;
 119         m_hDC = NULLHANDLE;
 120         m_ok  = false;
 121         m_bOwnsDC = false;
 122     }
 123
 124     //
 125     // As we created the DC, we must delete it in the dtor
 126     //
 127     m_bOwnsDC = true;
 128     m_ok = m_hDC != 0;
 129     return m_ok;
 130 } // end of wxMemoryDC::CreateCompatible
 131
 132 void wxMemoryDCImpl::DoSelect(
 133   const wxBitmap&                   rBitmap
 134 )
 135 {
 136     //
 137     // Select old bitmap out of the device context
 138     //
 139     if (m_hOldBitmap)
 140     {
 141         ::GpiSetBitmap(m_hPS, NULLHANDLE);
 142         if (m_vSelectedBitmap.Ok())
 143         {
 144             m_vSelectedBitmap.SetSelectedInto(NULL);
 145             m_vSelectedBitmap = wxNullBitmap;
 146         }
 147     }
 148
 149     //
 150     // Check for whether the bitmap is already selected into a device context
 151     //
 152     wxCHECK_RET( !rBitmap.GetSelectedInto() ||
 153                  (rBitmap.GetSelectedInto() == GetOwner()),
 154                  wxT("Bitmap is selected in another wxMemoryDC, delete the first wxMemoryDC or use SelectObject(NULL)") );
 155
 156     WXHBITMAP                       hBmp = rBitmap.GetHBITMAP();
 157
 158     if (!hBmp)
 159     {
 160         //
 161         // Bmps drawn to are upside down, so flip it before committing
 162         //
 163         POINTL                      vPoint[4] = { {0, m_vSelectedBitmap.GetHeight()}
 164                                                  ,{m_vSelectedBitmap.GetWidth(), 0}
 165                                                  ,{0, 0}
 166                                                  ,{m_vSelectedBitmap.GetWidth(), m_vSelectedBitmap.GetHeight()}
 167                                                 };
 168
 169
 170         ::GpiBitBlt( m_hPS
 171                     ,m_hPS
 172                     ,4
 173                     ,vPoint
 174                     ,ROP_SRCCOPY
 175                     ,BBO_IGNORE
 176                    );
 177         m_vSelectedBitmap.SetSelectedInto(NULL);
 178     }
 179
 180     m_vSelectedBitmap = rBitmap;
 181
 182
 183     if (!hBmp)
 184     {
 185
 186         m_hOldBitmap = (WXHBITMAP)::GpiSetBitmap(m_hPS, NULLHANDLE);
 187         return;
 188     }
 189     m_vSelectedBitmap.SetSelectedInto(GetOwner());
 190     m_hOldBitmap = (WXHBITMAP)::GpiSetBitmap(m_hPS, (HBITMAP)hBmp);
 191
 192     if (m_hOldBitmap == HBM_ERROR)
 193     {
 194         wxLogLastError(wxT("SelectObject(memDC, bitmap)"));
 195         wxFAIL_MSG(wxT("Couldn't select a bitmap into wxMemoryDC"));
 196     }
 197 } // end of wxMemoryDC::SelectObject
 198
 199 void wxMemoryDCImpl::DoGetSize(
 200   int*                              pWidth
 201 , int*                              pHeight
 202 ) const
 203 {
 204     if (!m_vSelectedBitmap.Ok())
 205     {
 206         *pWidth  = 0;
 207         *pHeight = 0;
 208         return;
 209     }
 210     *pWidth = m_vSelectedBitmap.GetWidth();
 211     *pHeight = m_vSelectedBitmap.GetHeight();
 212 } // end of wxMemoryDC::DoGetSize