mirror of https://github.com/PCSX2/pcsx2.git
463 lines
11 KiB
C++
463 lines
11 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/msw/region.cpp
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// Purpose: wxRegion implementation using Win32 API
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: Fri Oct 24 10:46:34 MET 1997
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// Copyright: (c) 1997-2002 wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#include "wx/region.h"
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#ifndef WX_PRECOMP
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#include "wx/gdicmn.h"
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#endif
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#include "wx/msw/private.h"
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IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
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IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
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// ----------------------------------------------------------------------------
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// wxRegionRefData implementation
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxRegionRefData : public wxGDIRefData
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{
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public:
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wxRegionRefData()
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{
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m_region = 0;
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}
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wxRegionRefData(const wxRegionRefData& data) : wxGDIRefData()
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{
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#if defined(__WIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
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DWORD noBytes = ::GetRegionData(data.m_region, 0, NULL);
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RGNDATA *rgnData = (RGNDATA*) new char[noBytes];
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::GetRegionData(data.m_region, noBytes, rgnData);
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m_region = ::ExtCreateRegion(NULL, noBytes, rgnData);
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delete[] (char*) rgnData;
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#else
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RECT rect;
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::GetRgnBox(data.m_region, &rect);
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m_region = ::CreateRectRgnIndirect(&rect);
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#endif
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}
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virtual ~wxRegionRefData()
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{
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::DeleteObject(m_region);
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m_region = 0;
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}
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HRGN m_region;
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private:
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// Cannot use
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// wxDECLARE_NO_COPY_CLASS(wxRegionRefData);
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// because copy constructor is explicitly declared above;
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// but no copy assignment operator is defined, so declare
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// it private to prevent the compiler from defining it:
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wxRegionRefData& operator=(const wxRegionRefData&);
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};
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#define M_REGION (((wxRegionRefData*)m_refData)->m_region)
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#define M_REGION_OF(rgn) (((wxRegionRefData*)(rgn.m_refData))->m_region)
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// ============================================================================
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// wxRegion implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// ctors and dtor
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// ----------------------------------------------------------------------------
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wxRegion::wxRegion()
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{
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m_refData = NULL;
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}
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wxRegion::wxRegion(WXHRGN hRegion)
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{
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m_refData = new wxRegionRefData;
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M_REGION = (HRGN) hRegion;
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}
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wxRegion::wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
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{
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m_refData = new wxRegionRefData;
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M_REGION = ::CreateRectRgn(x, y, x + w, y + h);
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}
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wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight)
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{
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m_refData = new wxRegionRefData;
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M_REGION = ::CreateRectRgn(topLeft.x, topLeft.y, bottomRight.x, bottomRight.y);
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}
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wxRegion::wxRegion(const wxRect& rect)
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{
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m_refData = new wxRegionRefData;
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M_REGION = ::CreateRectRgn(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height);
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}
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wxRegion::wxRegion(size_t n, const wxPoint *points, wxPolygonFillMode fillStyle)
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{
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#if defined(__WXMICROWIN__) || defined(__WXWINCE__)
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wxUnusedVar(n);
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wxUnusedVar(points);
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wxUnusedVar(fillStyle);
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m_refData = NULL;
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M_REGION = NULL;
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#else
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m_refData = new wxRegionRefData;
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M_REGION = ::CreatePolygonRgn
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(
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(POINT*)points,
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n,
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fillStyle == wxODDEVEN_RULE ? ALTERNATE : WINDING
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);
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#endif
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}
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wxRegion::~wxRegion()
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{
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// m_refData unrefed in ~wxObject
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}
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wxGDIRefData *wxRegion::CreateGDIRefData() const
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{
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return new wxRegionRefData;
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}
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wxGDIRefData *wxRegion::CloneGDIRefData(const wxGDIRefData *data) const
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{
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return new wxRegionRefData(*(wxRegionRefData *)data);
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}
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// ----------------------------------------------------------------------------
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// wxRegion operations
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// ----------------------------------------------------------------------------
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// Clear current region
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void wxRegion::Clear()
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{
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UnRef();
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}
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bool wxRegion::DoOffset(wxCoord x, wxCoord y)
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{
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wxCHECK_MSG( GetHrgn(), false, wxT("invalid wxRegion") );
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if ( !x && !y )
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{
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// nothing to do
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return true;
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}
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AllocExclusive();
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if ( ::OffsetRgn(GetHrgn(), x, y) == ERROR )
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{
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wxLogLastError(wxT("OffsetRgn"));
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return false;
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}
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return true;
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}
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// combine another region with this one
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bool wxRegion::DoCombine(const wxRegion& rgn, wxRegionOp op)
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{
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// we can't use the API functions if we don't have a valid region handle
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if ( !m_refData )
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{
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// combining with an empty/invalid region works differently depending
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// on the operation
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switch ( op )
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{
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case wxRGN_COPY:
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case wxRGN_OR:
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case wxRGN_XOR:
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*this = rgn;
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break;
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default:
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wxFAIL_MSG( wxT("unknown region operation") );
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// fall through
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case wxRGN_AND:
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case wxRGN_DIFF:
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// leave empty/invalid
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return false;
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}
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}
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else // we have a valid region
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{
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AllocExclusive();
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int mode;
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switch ( op )
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{
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case wxRGN_AND:
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mode = RGN_AND;
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break;
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case wxRGN_OR:
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mode = RGN_OR;
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break;
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case wxRGN_XOR:
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mode = RGN_XOR;
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break;
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case wxRGN_DIFF:
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mode = RGN_DIFF;
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break;
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default:
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wxFAIL_MSG( wxT("unknown region operation") );
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// fall through
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case wxRGN_COPY:
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mode = RGN_COPY;
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break;
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}
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if ( ::CombineRgn(M_REGION, M_REGION, M_REGION_OF(rgn), mode) == ERROR )
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{
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wxLogLastError(wxT("CombineRgn"));
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return false;
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}
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}
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return true;
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}
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// ----------------------------------------------------------------------------
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// wxRegion bounding box
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// ----------------------------------------------------------------------------
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// Outer bounds of region
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bool wxRegion::DoGetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const
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{
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if (m_refData)
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{
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RECT rect;
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::GetRgnBox(M_REGION, & rect);
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x = rect.left;
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y = rect.top;
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w = rect.right - rect.left;
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h = rect.bottom - rect.top;
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return true;
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}
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else
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{
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x = y = w = h = 0;
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return false;
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}
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}
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// Is region empty?
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bool wxRegion::IsEmpty() const
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{
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wxCoord x, y, w, h;
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GetBox(x, y, w, h);
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return (w == 0) && (h == 0);
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}
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bool wxRegion::DoIsEqual(const wxRegion& region) const
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{
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return ::EqualRgn(M_REGION, M_REGION_OF(region)) != 0;
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}
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// ----------------------------------------------------------------------------
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// wxRegion hit testing
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// ----------------------------------------------------------------------------
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// Does the region contain the point (x,y)?
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wxRegionContain wxRegion::DoContainsPoint(wxCoord x, wxCoord y) const
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{
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if (!m_refData)
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return wxOutRegion;
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return ::PtInRegion(M_REGION, (int) x, (int) y) ? wxInRegion : wxOutRegion;
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}
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// Does the region contain the rectangle (x, y, w, h)?
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wxRegionContain wxRegion::DoContainsRect(const wxRect& rect) const
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{
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if (!m_refData)
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return wxOutRegion;
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RECT rc;
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wxCopyRectToRECT(rect, rc);
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return ::RectInRegion(M_REGION, &rc) ? wxInRegion : wxOutRegion;
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}
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// Get internal region handle
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WXHRGN wxRegion::GetHRGN() const
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{
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return (WXHRGN)(m_refData ? M_REGION : 0);
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}
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// ============================================================================
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// wxRegionIterator implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// wxRegionIterator ctors/dtor
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// ----------------------------------------------------------------------------
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void wxRegionIterator::Init()
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{
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m_current =
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m_numRects = 0;
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m_rects = NULL;
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}
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wxRegionIterator::~wxRegionIterator()
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{
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delete [] m_rects;
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}
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// Initialize iterator for region
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wxRegionIterator::wxRegionIterator(const wxRegion& region)
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{
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m_rects = NULL;
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Reset(region);
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}
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wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& ri)
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{
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delete [] m_rects;
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m_current = ri.m_current;
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m_numRects = ri.m_numRects;
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if ( m_numRects )
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{
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m_rects = new wxRect[m_numRects];
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for ( long n = 0; n < m_numRects; n++ )
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m_rects[n] = ri.m_rects[n];
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}
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else
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{
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m_rects = NULL;
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}
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return *this;
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}
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// ----------------------------------------------------------------------------
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// wxRegionIterator operations
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// ----------------------------------------------------------------------------
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// Reset iterator for a new region.
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void wxRegionIterator::Reset(const wxRegion& region)
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{
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m_current = 0;
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m_region = region;
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wxDELETEA(m_rects);
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if (m_region.Empty())
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m_numRects = 0;
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else
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{
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DWORD noBytes = ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, 0, NULL);
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RGNDATA *rgnData = (RGNDATA*) new char[noBytes];
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::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, noBytes, rgnData);
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RGNDATAHEADER* header = (RGNDATAHEADER*) rgnData;
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m_rects = new wxRect[header->nCount];
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RECT* rect = (RECT*) ((char*)rgnData + sizeof(RGNDATAHEADER));
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size_t i;
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for (i = 0; i < header->nCount; i++)
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{
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m_rects[i] = wxRect(rect->left, rect->top,
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rect->right - rect->left, rect->bottom - rect->top);
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rect ++; // Advances pointer by sizeof(RECT)
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}
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m_numRects = header->nCount;
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delete[] (char*) rgnData;
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}
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}
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wxRegionIterator& wxRegionIterator::operator++()
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{
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if (m_current < m_numRects)
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++m_current;
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return *this;
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}
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wxRegionIterator wxRegionIterator::operator ++ (int)
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{
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wxRegionIterator tmp = *this;
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if (m_current < m_numRects)
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++m_current;
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return tmp;
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}
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// ----------------------------------------------------------------------------
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// wxRegionIterator accessors
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// ----------------------------------------------------------------------------
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wxCoord wxRegionIterator::GetX() const
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{
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wxCHECK_MSG( m_current < m_numRects, 0, wxT("invalid wxRegionIterator") );
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return m_rects[m_current].x;
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}
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wxCoord wxRegionIterator::GetY() const
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{
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wxCHECK_MSG( m_current < m_numRects, 0, wxT("invalid wxRegionIterator") );
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return m_rects[m_current].y;
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}
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wxCoord wxRegionIterator::GetW() const
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{
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wxCHECK_MSG( m_current < m_numRects, 0, wxT("invalid wxRegionIterator") );
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return m_rects[m_current].width;
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}
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wxCoord wxRegionIterator::GetH() const
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{
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wxCHECK_MSG( m_current < m_numRects, 0, wxT("invalid wxRegionIterator") );
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return m_rects[m_current].height;
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}
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