X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/77f62aa7b6d354c46fce7829fe90a08b0a0ee803..2f45f5545f8f0c422e7d320f00e2ce068bd671b0:/include/wx/dcbuffer.h diff --git a/include/wx/dcbuffer.h b/include/wx/dcbuffer.h index 784d88766e..203f7cd1a3 100644 --- a/include/wx/dcbuffer.h +++ b/include/wx/dcbuffer.h @@ -37,66 +37,62 @@ // does not prepare the window DC #define wxBUFFER_CLIENT_AREA 0x02 -class WXDLLEXPORT wxBufferedDC : public wxMemoryDC +// Set when not using specific buffer bitmap. Note that this +// is private style and not returned by GetStyle. +#define wxBUFFER_USES_SHARED_BUFFER 0x04 + +class WXDLLIMPEXP_CORE wxBufferedDC : public wxMemoryDC { public: // Default ctor, must subsequently call Init for two stage construction. - wxBufferedDC() : m_dc( 0 ), m_buffer(NULL), m_style(0) + wxBufferedDC() + : m_dc(NULL), + m_buffer(NULL), + m_style(0) { } // Construct a wxBufferedDC using a user supplied buffer. wxBufferedDC(wxDC *dc, - const wxBitmap &buffer = wxNullBitmap, + wxBitmap& buffer = wxNullBitmap, int style = wxBUFFER_CLIENT_AREA) - : m_dc( dc ), - m_buffer( &buffer ), - m_style(style) + : m_dc(NULL), m_buffer(NULL) { - UseBuffer(); + Init(dc, buffer, style); } // 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 style = wxBUFFER_CLIENT_AREA) - : m_dc( dc ), - m_buffer(NULL), - m_style(style) - + wxBufferedDC(wxDC *dc, const wxSize& area, int style = wxBUFFER_CLIENT_AREA) + : m_dc(NULL), m_buffer(NULL) { - UseBuffer(area.x, area.y); + Init(dc, area, style); } - // default copy ctor ok. - // The usually desired action in the dtor is to blit the buffer. virtual ~wxBufferedDC() { - if ( m_dc ) UnMask(); + 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. + // These reimplement the actions of the ctors for two stage creation void Init(wxDC *dc, - const wxBitmap &buffer=wxNullBitmap, + wxBitmap& buffer = wxNullBitmap, int style = wxBUFFER_CLIENT_AREA) { - wxASSERT_MSG( m_dc == 0 && m_buffer == NULL, - _T("wxBufferedDC already initialised") ); - m_dc = dc; + InitCommon(dc, style); + m_buffer = &buffer; - m_style = style; + UseBuffer(); } void Init(wxDC *dc, const wxSize &area, int style = wxBUFFER_CLIENT_AREA) { - wxASSERT_MSG( m_dc == 0 && m_buffer == NULL, - _T("wxBufferedDC already initialised") ); - m_dc = dc; - m_buffer = NULL; - m_style = style; + InitCommon(dc, style); + UseBuffer(area.x, area.y); } @@ -106,27 +102,26 @@ 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() - { - wxASSERT_MSG( m_dc != 0, - _T("No underlying DC associated with wxBufferedDC (anymore)") ); - - wxCoord x=0, y=0; - - if (m_style & wxBUFFER_CLIENT_AREA) - GetDeviceOrigin(&x, &y); - - m_dc->Blit( 0, 0, - m_buffer->GetWidth(), m_buffer->GetHeight(), this, - -x, -y ); - m_dc = NULL; - } + void UnMask(); // Set and get the style void SetStyle(int style) { m_style = style; } - int GetStyle() const { return m_style; } + int GetStyle() const { return m_style & ~wxBUFFER_USES_SHARED_BUFFER; } private: + // common part of Init()s + void InitCommon(wxDC *dc, int style) + { + wxASSERT_MSG( !m_dc, _T("wxBufferedDC already initialised") ); + + m_dc = dc; + m_style = style; + + // inherit the same layout direction as the original DC + if (dc && dc->IsOk()) + SetLayoutDirection(dc->GetLayoutDirection()); + } + // check that the bitmap is valid and use it void UseBuffer(wxCoord w = -1, wxCoord h = -1); @@ -137,8 +132,8 @@ private: // could probably be a reference. wxDC *m_dc; - // the buffer (selected in this DC) - const wxBitmap *m_buffer; + // the buffer (selected in this DC), initially invalid + wxBitmap *m_buffer; // the buffering style int m_style; @@ -154,21 +149,21 @@ private: // Creates a double buffered wxPaintDC, optionally allowing the // user to specify their own buffer to use. -class WXDLLEXPORT wxBufferedPaintDC : public wxBufferedDC +class WXDLLIMPEXP_CORE wxBufferedPaintDC : public wxBufferedDC { public: // If no bitmap is supplied by the user, a temporary one will be created. - wxBufferedPaintDC(wxWindow *window, const wxBitmap& buffer, int style = wxBUFFER_CLIENT_AREA) + wxBufferedPaintDC(wxWindow *window, wxBitmap& buffer, int style = wxBUFFER_CLIENT_AREA) : m_paintdc(window) { // If we're buffering the virtual window, scale the paint DC as well if (style & wxBUFFER_VIRTUAL_AREA) window->PrepareDC( m_paintdc ); - if( buffer != wxNullBitmap ) + if( buffer.IsOk() ) Init(&m_paintdc, buffer, style); else - Init(&m_paintdc, window->GetClientSize(), style); + Init(&m_paintdc, GetBufferedSize(window, style), style); } // If no bitmap is supplied by the user, a temporary one will be created. @@ -179,7 +174,7 @@ public: if (style & wxBUFFER_VIRTUAL_AREA) window->PrepareDC( m_paintdc ); - Init(&m_paintdc, window->GetClientSize(), style); + Init(&m_paintdc, GetBufferedSize(window, style), style); } // default copy ctor ok. @@ -191,6 +186,15 @@ public: UnMask(); } +protected: + // return the size needed by the buffer: this depends on whether we're + // buffering just the currently shown part or the total (scrolled) window + static wxSize GetBufferedSize(wxWindow *window, int style) + { + return style & wxBUFFER_VIRTUAL_AREA ? window->GetVirtualSize() + : window->GetClientSize(); + } + private: wxPaintDC m_paintdc; @@ -215,7 +219,7 @@ private: #ifdef __WXDEBUG__ -class wxAutoBufferedPaintDC : public wxAutoBufferedPaintDCBase +class WXDLLIMPEXP_CORE wxAutoBufferedPaintDC : public wxAutoBufferedPaintDCBase { public: @@ -258,6 +262,5 @@ inline wxDC* wxAutoBufferedPaintDCFactory(wxWindow* window) else return new wxBufferedPaintDC(window); } - #endif // _WX_DCBUFFER_H_