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