X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/223d09f6b523aac674ef9b72a883dfa8d37c5d4e..ab93a576f47003ad05b1378ead108474b65b611c:/src/msw/dcmemory.cpp diff --git a/src/msw/dcmemory.cpp b/src/msw/dcmemory.cpp index c8ce5662de..744f2ae65a 100644 --- a/src/msw/dcmemory.cpp +++ b/src/msw/dcmemory.cpp @@ -6,136 +6,201 @@ // Created: 01/02/97 // RCS-ID: $Id$ // Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// +// ============================================================================ +// declarations +// ============================================================================ + +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- + #ifdef __GNUG__ -#pragma implementation "dcmemory.h" + #pragma implementation "dcmemory.h" #endif // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif #ifndef WX_PRECOMP -#include "wx/utils.h" + #include "wx/utils.h" + #include "wx/log.h" #endif #include "wx/msw/private.h" #include "wx/dcmemory.h" -#if !USE_SHARED_LIBRARY -IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC) -#endif +// ---------------------------------------------------------------------------- +// wxWin macros +// ---------------------------------------------------------------------------- -/* - * Memory DC - * - */ +IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC) -wxMemoryDC::wxMemoryDC(void) -{ - m_hDC = (WXHDC) ::CreateCompatibleDC((HDC) NULL); - m_ok = (m_hDC != 0); - m_bOwnsDC = TRUE; +// ============================================================================ +// implementation +// ============================================================================ - SetBrush(*wxWHITE_BRUSH); - SetPen(*wxBLACK_PEN); +// ---------------------------------------------------------------------------- +// wxMemoryDC +// ---------------------------------------------------------------------------- - // 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 ); +wxMemoryDC::wxMemoryDC() +{ + CreateCompatible(NULL); + Init(); } -wxMemoryDC::wxMemoryDC(wxDC *old_dc) +wxMemoryDC::wxMemoryDC(wxDC *dc) { - old_dc->BeginDrawing(); + wxCHECK_RET( dc, _T("NULL dc in wxMemoryDC ctor") ); + + dc->BeginDrawing(); - m_hDC = (WXHDC) ::CreateCompatibleDC((HDC) old_dc->GetHDC()); - m_ok = (m_hDC != 0); + CreateCompatible(dc); - old_dc->EndDrawing(); + dc->EndDrawing(); - SetBrush(*wxWHITE_BRUSH); - SetPen(*wxBLACK_PEN); + Init(); +} - // 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 ); +void wxMemoryDC::Init() +{ + 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 + ::SetBkMode( GetHdc(), TRANSPARENT ); + } } -wxMemoryDC::~wxMemoryDC(void) +bool wxMemoryDC::CreateCompatible(wxDC *dc) { + m_hDC = (WXHDC)::CreateCompatibleDC(dc ? GetHdcOf(*dc) : NULL); + + // as we created the DC, we must delete it in the dtor + m_bOwnsDC = TRUE; + + m_ok = m_hDC != 0; + + return m_ok; } void wxMemoryDC::SelectObject(const wxBitmap& bitmap) { - // Select old bitmap out of the device context - if (m_oldBitmap) - { - ::SelectObject((HDC) m_hDC, (HBITMAP) m_oldBitmap); - if (m_selectedBitmap.Ok()) + // select old bitmap out of the device context + if ( m_oldBitmap ) + { + ::SelectObject(GetHdc(), (HBITMAP) m_oldBitmap); + if ( m_selectedBitmap.Ok() ) + { + m_selectedBitmap.SetSelectedInto(NULL); + m_selectedBitmap = wxNullBitmap; + } + } + + // check for whether the bitmap is already selected into a device context + wxCHECK_RET( !bitmap.GetSelectedInto() || + (bitmap.GetSelectedInto() == this), + wxT("Bitmap is selected in another wxMemoryDC, delete the first wxMemoryDC or use SelectObject(NULL)") ); + + m_selectedBitmap = bitmap; + WXHBITMAP hBmp = m_selectedBitmap.GetHBITMAP(); + if ( !hBmp ) + return; + + m_selectedBitmap.SetSelectedInto(this); + hBmp = (WXHBITMAP)::SelectObject(GetHdc(), (HBITMAP)hBmp); + + if ( !hBmp ) + { + wxLogLastError(wxT("SelectObject(memDC, bitmap)")); + + wxFAIL_MSG(wxT("Couldn't select a bitmap into wxMemoryDC")); + } + else if ( !m_oldBitmap ) { - m_selectedBitmap.SetSelectedInto(NULL); - m_selectedBitmap = wxNullBitmap; + m_oldBitmap = hBmp; } - } - - // Do own check for whether the bitmap is already selected into - // a device context - if (bitmap.GetSelectedInto() && (bitmap.GetSelectedInto() != this)) - { - wxFatalError(wxT("Error in wxMemoryDC::SelectObject\nBitmap is selected in another wxMemoryDC.\nDelete the first wxMemoryDC or use SelectObject(NULL)")); - return; - } - - // Check if the bitmap has the correct depth for this device context -// if (bitmap.Ok() && (bitmap.GetDepth() != GetDepth())) - // JACS 11/12/98: disabling this since the Forty Thieves sample - // shows this not working properly. In fact, if loading from a resource, - // the depth should become the screen depth, so why was it being called? -// if (0) -// { -// // Make a new bitmap that has the correct depth. -// wxBitmap newBitmap = bitmap.GetBitmapForDC(* this); -// -// m_selectedBitmap = newBitmap ; -// } -// else -// { - m_selectedBitmap = bitmap; -// } - - if (!m_selectedBitmap.Ok()) - return; - - m_selectedBitmap.SetSelectedInto(this); - HBITMAP bm = (HBITMAP) ::SelectObject((HDC) m_hDC, (HBITMAP) m_selectedBitmap.GetHBITMAP()); - - if (bm == ERROR) - { - wxFatalError(wxT("Error in wxMemoryDC::SelectObject\nBitmap may not be loaded, or may be selected in another wxMemoryDC.\nDelete the first wxMemoryDC to deselect bitmap.")); - } - else if (!m_oldBitmap) - m_oldBitmap = (WXHBITMAP) bm; } void wxMemoryDC::DoGetSize(int *width, int *height) const { - if (!m_selectedBitmap.Ok()) - { - *width = 0; *height = 0; - return; - } - *width = m_selectedBitmap.GetWidth(); - *height = m_selectedBitmap.GetHeight(); + if ( m_selectedBitmap.Ok() ) + { + *width = m_selectedBitmap.GetWidth(); + *height = m_selectedBitmap.GetHeight(); + } + else + { + *width = 0; + *height = 0; + } +} + +// the rest of this file deals with drawing rectangles workaround, disabled by +// default + +#define wxUSE_MEMORY_DC_DRAW_RECTANGLE 0 + +#if wxUSE_MEMORY_DC_DRAW_RECTANGLE + +// For some reason, drawing a rectangle on a memory DC has problems. +// Use this substitute if we can. +static void wxDrawRectangle(wxDC& dc, wxCoord x, wxCoord y, wxCoord width, wxCoord height) +{ + wxBrush brush(dc.GetBrush()); + wxPen pen(dc.GetPen()); + if (brush.Ok() && brush.GetStyle() != wxTRANSPARENT) + { + HBRUSH hBrush = (HBRUSH) brush.GetResourceHandle() ; + if (hBrush) + { + RECT rect; + rect.left = x; rect.top = y; + rect.right = x + width - 1; + rect.bottom = y + height - 1; + ::FillRect((HDC) dc.GetHDC(), &rect, hBrush); + } + } + width --; height --; + if (pen.Ok() && pen.GetStyle() != wxTRANSPARENT) + { + dc.DrawLine(x, y, x + width, y); + dc.DrawLine(x, y, x, y + height); + dc.DrawLine(x, y+height, x+width, y + height); + dc.DrawLine(x+width, y+height, x+width, y); + } +} + +#endif // wxUSE_MEMORY_DC_DRAW_RECTANGLE + +void wxMemoryDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) +{ + // Set this to 1 to work around an apparent video driver bug + // (visible with e.g. 70x70 rectangle on a memory DC; see Drawing sample) +#if wxUSE_MEMORY_DC_DRAW_RECTANGLE + if (m_brush.Ok() && m_pen.Ok() && + (m_brush.GetStyle() == wxSOLID || m_brush.GetStyle() == wxTRANSPARENT) && + (m_pen.GetStyle() == wxSOLID || m_pen.GetStyle() == wxTRANSPARENT) && + (GetLogicalFunction() == wxCOPY)) + { + wxDrawRectangle(* this, x, y, width, height); + } + else +#endif // wxUSE_MEMORY_DC_DRAW_RECTANGLE + { + wxDC::DoDrawRectangle(x, y, width, height); + } }