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Removed the SaveBG hack. The real incompatibility is that the MemoryDC

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is not automatically cleared to the BG colour of the window when a
temporary bitmap is used.

Inlined the rest of the methods, there really is no reason for them not
to be.  (will remove dcbuffer.cpp as soon as I figure out the bakefiles)

Do device to logical transforms in UnMask.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@25859 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Ron Lee
2004-02-19 06:23:01 +00:00
parent ee65839881
commit dbd22c6a0e
2 changed files with 45 additions and 115 deletions
Download Patch File Download Diff File Expand all files Collapse all files

97
include/wx/dcbuffer.h
View File

@@ -12,26 +12,9 @@
#ifndef _WX_DCBUFFER_H_
#define _WX_DCBUFFER_H_
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma interface "dcbuffer.h"
#endif
#include "wx/dcmemory.h"
#include "wx/dcclient.h"
// flags for wxBufferedDC ctor/Init()
enum
{
// this is more efficient and hence default
wxBUFFER_DC_OVERWRITE_BG = 0,
// preserve the old background: more time consuming
wxBUFFER_DC_PRESERVE_BG = 1,
// flags used by default
wxBUFFER_DC_DEFAULT = wxBUFFER_DC_OVERWRITE_BG
};
// ----------------------------------------------------------------------------
// Double buffering helper.
@@ -46,22 +29,46 @@ public:
}
// Construct a wxBufferedDC using a user supplied buffer.
wxBufferedDC(wxDC *dc, const wxBitmap &buffer);
wxBufferedDC(wxDC *dc, const wxBitmap &buffer)
: m_dc( dc ),
m_buffer( buffer )
{
UseBuffer();
}
// Construct a wxBufferedDC with an internal buffer of 'area'
// (where area is usually something like the size of the window
// being buffered)
wxBufferedDC(wxDC *dc, const wxSize &area, int flags = wxBUFFER_DC_DEFAULT);
wxBufferedDC(wxDC *dc, const wxSize &area)
: m_dc( dc ),
m_buffer( area.GetWidth(), area.GetHeight() )
{
UseBuffer();
}
// default copy ctor ok.
// The usually desired action in the dtor is to blit the buffer.
virtual ~wxBufferedDC() { if ( m_dc ) UnMask(); }
virtual ~wxBufferedDC()
{
if ( m_dc ) UnMask();
}
// These reimplement the actions of the ctors for two stage creation, but
// are not used by the ctors themselves to save a few cpu cycles.
void Init(wxDC *dc, const wxBitmap &bitmap);
void Init(wxDC *dc, const wxSize &area, int flags = wxBUFFER_DC_DEFAULT);
void Init(wxDC *dc, const wxBitmap &buffer)
{
wxASSERT_MSG( m_dc == 0 && m_buffer == wxNullBitmap,
_T("wxBufferedDC already initialised") );
m_dc = dc;
m_buffer = buffer;
UseBuffer();
}
void Init(wxDC *dc, const wxSize &area)
{
Init(dc, wxBitmap(area.GetWidth(), area.GetHeight()));
}
// Blits the buffer to the dc, and detaches the dc from the buffer (so it
// can be effectively used once only).
@@ -69,7 +76,16 @@ public:
// Usually called in the dtor or by the dtor of derived classes if the
// BufferedDC must blit before the derived class (which may own the dc it's
// blitting to) is destroyed.
void UnMask();
void UnMask()
{
wxASSERT_MSG( m_dc != 0,
_T("No underlying DC associated with wxBufferedDC (anymore)") );
m_dc->Blit( m_dc->DeviceToLogicalX(0), m_dc->DeviceToLogicalY(0),
m_buffer.GetWidth(), m_buffer.GetHeight(), this,
DeviceToLogicalX(0), DeviceToLogicalY(0) );
m_dc = NULL;
}
private:
// check that the bitmap is valid and use it
@@ -80,15 +96,6 @@ private:
SelectObject(m_buffer);
}
// preserve the background if necessary
void SaveBg(const wxSize& area, int flags)
{
if ( flags & wxBUFFER_DC_PRESERVE_BG )
{
Blit(0, 0, area.GetWidth(), area.GetHeight(), m_dc, 0, 0);
}
}
// the underlying DC to which we copy everything drawn on this one in
// UnMask()
//
@@ -112,22 +119,14 @@ private:
class WXDLLIMPEXP_ADV wxBufferedPaintDC : public wxBufferedDC
{
public:
// this ctor creates a bitmap of the size of the window for buffering
wxBufferedPaintDC(wxWindow *window, int flags = wxBUFFER_DC_DEFAULT)
// If no bitmap is supplied by the user, a temporary one wil; be created.
wxBufferedPaintDC(wxWindow *window, const wxBitmap& buffer = wxNullBitmap)
: m_paintdc(window)
{
Init(&m_paintdc, window->GetClientSize(), flags);
Prepare(window);
}
// the bitmap must be valid here
wxBufferedPaintDC(wxWindow *window, const wxBitmap& buffer)
: m_paintdc(window)
{
Init(&m_paintdc, buffer);
Prepare(window);
if( buffer != wxNullBitmap )
Init(&m_paintdc, buffer);
else
Init(&m_paintdc, window->GetClientSize());
}
// default copy ctor ok.
@@ -140,12 +139,6 @@ public:
}
private:
// prepare the underlying DC
void Prepare(wxWindow *window)
{
window->PrepareDC(m_paintdc);
}
wxPaintDC m_paintdc;
DECLARE_NO_COPY_CLASS(wxBufferedPaintDC)

63
src/generic/dcbuffer.cpp
View File

@@ -9,66 +9,3 @@
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "dcbuffer.h"
#endif
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/window.h"
#endif
#include "wx/dcbuffer.h"
// ----------------------------------------------------------------------------
// Double buffering helper.
// ----------------------------------------------------------------------------
wxBufferedDC::wxBufferedDC(wxDC *dc, const wxBitmap& buffer)
: m_dc( dc ),
m_buffer( buffer )
{
UseBuffer();
}
wxBufferedDC::wxBufferedDC(wxDC *dc, const wxSize& area, int flags)
: m_dc( dc ),
m_buffer( area.GetWidth(), area.GetHeight() )
{
UseBuffer();
SaveBg(area, flags);
}
void wxBufferedDC::Init( wxDC *dc, const wxBitmap &buffer )
{
wxASSERT_MSG( m_dc == 0 && m_buffer == wxNullBitmap,
_T("wxBufferedDC already initialised") );
m_dc = dc;
m_buffer = buffer;
UseBuffer();
}
void wxBufferedDC::Init(wxDC *dc, const wxSize& area, int flags)
{
Init(dc, wxBitmap(area.GetWidth(), area.GetHeight()));
SaveBg(area, flags);
}
void wxBufferedDC::UnMask()
{
wxASSERT_MSG( m_dc != 0,
_T("No underlying DC associated with wxBufferedDC (anymore)") );
m_dc->Blit( 0, 0, m_buffer.GetWidth(), m_buffer.GetHeight(), this, 0, 0 );
m_dc = NULL;
}