correct bug with using uninitialized end variable (unused variable warnings are not...

[wxWidgets.git] / src / os2 / dcmemory.cpp

diff --git a/src/os2/dcmemory.cpp b/src/os2/dcmemory.cpp
index 1ab4a99f27880821dc7bd3a512bbd3def1b7289c..d4d5ec937cb7321b0db4d1a9d577543ea486c539 100644 (file)
--- a/src/os2/dcmemory.cpp
+++ b/src/os2/dcmemory.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        dcmemory.cpp
+// Name:        src/os2/dcmemory.cpp

 // Purpose:     wxMemoryDC class
 // Author:      David Webster
 // Modified by:
 // Purpose:     wxMemoryDC class
 // Author:      David Webster
 // Modified by:


@@ -12,78 +12,201 @@
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 

+#include "wx/dcmemory.h"
+#include "wx/os2/dcmemory.h"
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

-#include "wx/utils.h"
+    #include "wx/utils.h"
+    #include "wx/app.h"
+    #include "wx/log.h"

 #endif
 
 #include "wx/os2/private.h"
 
 #endif
 
 #include "wx/os2/private.h"
 

-#include "wx/dcmemory.h"
+IMPLEMENT_ABSTRACT_CLASS(wxMemoryDCImpl, wxPMDCImpl)

 
 

-IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)
-
-/*
- * Memory DC
- *
- */
+/////////////////////////////////////////////////////////////////////////////
+// Memory DC
+/////////////////////////////////////////////////////////////////////////////

 
 

-wxMemoryDC::wxMemoryDC(void)
+wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner ) 
+        : wxPMDCImpl( owner )

 {
 {

-  // TODO:
-/*
-  m_hDC = (WXHDC) ::CreateCompatibleDC((HDC) NULL);
-  m_ok = (m_hDC != 0);
-  m_bOwnsDC = TRUE;
-
-  SetBrush(*wxWHITE_BRUSH);
-  SetPen(*wxBLACK_PEN);
-
-  // the background mode is only used for text background
-  // and is set in DrawText() to OPAQUE as required, other-
-  // wise always TRANSPARENT, RR
-  ::SetBkMode( GetHdc(), TRANSPARENT );
-*/
+    CreateCompatible(NULL); 
+    Init(); 

 }
 
 }
 

-wxMemoryDC::wxMemoryDC(wxDC *old_dc)
-{
-  // TODO:
-/*
-  old_dc->BeginDrawing();
-
-  m_hDC = (WXHDC) ::CreateCompatibleDC((HDC) old_dc->GetHDC());
-  m_ok = (m_hDC != 0);
-
-  old_dc->EndDrawing();
-
-  SetBrush(*wxWHITE_BRUSH);
-  SetPen(*wxBLACK_PEN);
-
-  // the background mode is only used for text background
-  // and is set in DrawText() to OPAQUE as required, other-
-  // wise always TRANSPARENT, RR
-  ::SetBkMode( GetHdc(), TRANSPARENT );
-*/
+wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxBitmap& bitmap ) 
+        : wxPMDCImpl( owner ) 
+{ 
+    CreateCompatible(NULL); 
+    Init(); 
+    DoSelect(bitmap);

 }
 
 }
 

-wxMemoryDC::~wxMemoryDC(void)
+wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxDC *pOldDC)
+        : wxPMDCImpl( owner ) 

 {
 {

-};
+    wxCHECK_RET( pOldDC, _T("NULL dc in wxMemoryDC ctor") );

 
 

-void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
-{
-   // TODO:
-};
+    CreateCompatible(pOldDC);
+    Init();
+} // end of wxMemoryDC::wxMemoryDC

 
 

-void wxMemoryDC::DoGetSize( int *width, int *height ) const
+void wxMemoryDCImpl::Init()

 {
 {

-  if (!m_selectedBitmap.Ok())
-  {
-    *width = 0; *height = 0;
-    return;
-  }
-  *width = m_selectedBitmap.GetWidth();
-  *height = m_selectedBitmap.GetHeight();
-};
-
-
+    if (m_ok)
+    {
+        SetBrush(*wxWHITE_BRUSH);
+        SetPen(*wxBLACK_PEN);
+
+        // the background mode is only used for text background and is set in
+        // DrawText() to OPAQUE as required, otherwise always TRANSPARENT
+        ::GpiSetBackMix( GetHPS(), BM_LEAVEALONE );
+    }
+    memset(&m_vRclPaint, 0, sizeof(m_vRclPaint));
+} // end of wxMemoryDC::Init
+
+bool wxMemoryDCImpl::CreateCompatible( wxDC* WXUNUSED(pDC) )
+{
+    HDC           hDC;
+    HPS           hPS;
+    DEVOPENSTRUC  vDOP = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
+    SIZEL         vSize = {0, 0};
+
+    //
+    // Create a memory device context
+    //
+    hDC = ::DevOpenDC(vHabmain, OD_MEMORY, "*", 5L, (PDEVOPENDATA)&vDOP, NULLHANDLE);
+    if (hDC != DEV_ERROR)
+    {
+        hPS = ::GpiCreatePS(vHabmain, hDC, &vSize, PU_PELS | GPIT_MICRO | GPIA_ASSOC);
+        if (hPS != GPI_ERROR)
+        {
+            m_hPS = hPS;
+            m_hDC = hDC;
+            m_ok = true;
+            m_bOwnsDC = true;
+            //
+            // Set the wxWidgets color table
+            //
+            ::GpiCreateLogColorTable( m_hPS
+                                     ,0L
+                                     ,LCOLF_CONSECRGB
+                                     ,0L
+                                     ,(LONG)wxTheColourDatabase->m_nSize
+                                     ,(PLONG)wxTheColourDatabase->m_palTable
+                                    );
+            ::GpiCreateLogColorTable( m_hPS
+                                     ,0L
+                                     ,LCOLF_RGB
+                                     ,0L
+                                     ,0L
+                                     ,NULL
+                                    );
+        }
+        else
+        {
+            m_hPS = NULLHANDLE;
+            m_hDC = NULLHANDLE;
+            m_ok  = false;
+            m_bOwnsDC = false;
+        }
+    }
+    else
+    {
+        m_hPS = NULLHANDLE;
+        m_hDC = NULLHANDLE;
+        m_ok  = false;
+        m_bOwnsDC = false;
+    }
+
+    //
+    // As we created the DC, we must delete it in the dtor
+    //
+    m_bOwnsDC = true;
+    m_ok = m_hDC != 0;
+    return m_ok;
+} // end of wxMemoryDC::CreateCompatible
+
+void wxMemoryDCImpl::DoSelect(
+  const wxBitmap&                   rBitmap
+)
+{
+    //
+    // Select old bitmap out of the device context
+    //
+    if (m_hOldBitmap)
+    {
+        ::GpiSetBitmap(m_hPS, NULLHANDLE);
+        if (m_vSelectedBitmap.Ok())
+        {
+            m_vSelectedBitmap.SetSelectedInto(NULL);
+            m_vSelectedBitmap = wxNullBitmap;
+        }
+    }
+
+    //
+    // Check for whether the bitmap is already selected into a device context
+    //
+    wxCHECK_RET( !rBitmap.GetSelectedInto() ||
+                 (rBitmap.GetSelectedInto() == GetOwner()),
+                 wxT("Bitmap is selected in another wxMemoryDC, delete the first wxMemoryDC or use SelectObject(NULL)") );
+
+    WXHBITMAP                       hBmp = rBitmap.GetHBITMAP();
+
+    if (!hBmp)
+    {
+        //
+        // Bmps drawn to are upside down, so flip it before committing
+        //
+        POINTL                      vPoint[4] = { {0, m_vSelectedBitmap.GetHeight()}
+                                                 ,{m_vSelectedBitmap.GetWidth(), 0}
+                                                 ,{0, 0}
+                                                 ,{m_vSelectedBitmap.GetWidth(), m_vSelectedBitmap.GetHeight()}
+                                                };
+
+
+        ::GpiBitBlt( m_hPS
+                    ,m_hPS
+                    ,4
+                    ,vPoint
+                    ,ROP_SRCCOPY
+                    ,BBO_IGNORE
+                   );
+        m_vSelectedBitmap.SetSelectedInto(NULL);
+    }
+
+    m_vSelectedBitmap = rBitmap;
+
+
+    if (!hBmp)
+    {
+
+        m_hOldBitmap = (WXHBITMAP)::GpiSetBitmap(m_hPS, NULLHANDLE);
+        return;
+    }
+    m_vSelectedBitmap.SetSelectedInto(GetOwner());
+    m_hOldBitmap = (WXHBITMAP)::GpiSetBitmap(m_hPS, (HBITMAP)hBmp);
+
+    if (m_hOldBitmap == HBM_ERROR)
+    {
+        wxLogLastError(wxT("SelectObject(memDC, bitmap)"));
+        wxFAIL_MSG(wxT("Couldn't select a bitmap into wxMemoryDC"));
+    }
+} // end of wxMemoryDC::SelectObject
+
+void wxMemoryDCImpl::DoGetSize(
+  int*                              pWidth
+, int*                              pHeight
+) const
+{
+    if (!m_vSelectedBitmap.Ok())
+    {
+        *pWidth  = 0;
+        *pHeight = 0;
+        return;
+    }
+    *pWidth = m_vSelectedBitmap.GetWidth();
+    *pHeight = m_vSelectedBitmap.GetHeight();
+} // end of wxMemoryDC::DoGetSize