initial (not yet working) code for DirectFB port

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40865 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dfb/region.h

@@ -0,0 +1,156 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/dfb/region.h
+// Purpose:     wxRegion class
+// Author:      Vaclav Slavik
+// Created:     2006-08-08
+// RCS-ID:      $Id$
+// Copyright:   (c) 2006 REA Elektronik GmbH
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_DFB_REGION_H_
+#define _WX_DFB_REGION_H_
+
+#include "wx/gdiobj.h"
+#include "wx/gdicmn.h"
+
+#warning "Move these to wx/region.h when common code is moved there"
+class WXDLLIMPEXP_CORE wxBitmap;
+class WXDLLIMPEXP_CORE wxColour;
+
+class WXDLLIMPEXP_CORE wxRegion : public wxGDIObject
+{
+
+public:
+    wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
+    wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight);
+    wxRegion(const wxRect& rect);
+    wxRegion(const wxBitmap& bmp)
+    {
+        Union(bmp);
+    }
+    wxRegion(const wxBitmap& bmp,
+             const wxColour& transColour, int tolerance = 0)
+    {
+        Union(bmp, transColour, tolerance);
+    }
+
+    wxRegion();
+    ~wxRegion();
+
+    #warning "FIXME: move this to common code? at least Ok()"
+    bool Ok() const { return m_refData != NULL; }
+
+    bool operator==(const wxRegion& region) const;
+    bool operator!=(const wxRegion& region) const { return !(*this == region); }
+
+    // Clear current region
+    void Clear();
+
+    bool Offset(wxCoord x, wxCoord y);
+
+    // Union rectangle or region with this.
+    bool Union(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+        { return Union(wxRect(x, y, width, height)); }
+    bool Union(const wxRect& rect);
+    bool Union(const wxRegion& region);
+
+    // Intersect rectangle or region with this.
+    bool Intersect(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+        { return Intersect(wxRect(x, y, width, height)); }
+    bool Intersect(const wxRect& rect);
+    bool Intersect(const wxRegion& region);
+
+    // Subtract rectangle or region from this:
+    // Combines the parts of 'this' that are not part of the second region.
+    bool Subtract(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+        { return Subtract(wxRect(x, y, width, height)); }
+    bool Subtract(const wxRect& rect);
+    bool Subtract(const wxRegion& region);
+
+    // XOR: the union of two combined regions except for any overlapping areas.
+    bool Xor(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+        { return Xor(wxRect(x, y, width, height)); }
+    bool Xor(const wxRect& rect);
+    bool Xor(const wxRegion& region);
+
+    // Outer bounds of region
+    void GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const;
+    wxRect GetBox(void) const;
+
+    // Is region empty?
+    bool Empty(void) const;
+    inline bool IsEmpty(void) const { return Empty(); }
+
+    // Does the region contain the point (x,y)?
+    wxRegionContain Contains(wxCoord x, wxCoord y) const;
+    // Does the region contain the point pt?
+    wxRegionContain Contains(const wxPoint& pt) const
+        { return Contains(pt.x, pt.y); }
+    // Does the region contain the rectangle rect?
+    wxRegionContain Contains(const wxRect& rect) const;
+    // Does the region contain the rectangle (x, y, w, h)?
+    wxRegionContain Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const
+        { return Contains(wxRect(x, y, w, h)); }
+
+
+    #warning "Move these union versions + ConvertToBitmap to wxRegionBase"
+    // Convert the region to a B&W bitmap with the white pixels being inside
+    // the region.
+    wxBitmap ConvertToBitmap() const;
+
+    // Use the non-transparent pixels of a wxBitmap for the region to combine
+    // with this region.  First version takes transparency from bitmap's mask,
+    // second lets the user specify the colour to be treated as transparent
+    // along with an optional tolerance value.
+    // NOTE: implemented in common/rgncmn.cpp
+    bool Union(const wxBitmap& bmp);
+    bool Union(const wxBitmap& bmp,
+               const wxColour& transColour, int tolerance = 0);
+
+    // NB: implementation detail of DirectFB, should be removed if full
+    //     (i.e. not rect-only version is implemented) so that all code that
+    //     assumes region==rect breaks
+    wxRect AsRect() const { return GetBox(); }
+
+protected:
+    // ref counting code
+    virtual wxObjectRefData *CreateRefData() const;
+    virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
+
+    friend class WXDLLIMPEXP_CORE wxRegionIterator;
+
+    DECLARE_DYNAMIC_CLASS(wxRegion);
+};
+
+
+class WXDLLIMPEXP_CORE wxRegionIterator : public wxObject
+{
+public:
+    wxRegionIterator() {}
+    wxRegionIterator(const wxRegion& region) { Reset(region); }
+
+    void Reset() { m_rect = wxRect(); }
+    void Reset(const wxRegion& region);
+
+    bool HaveRects() const { return !m_rect.IsEmpty(); }
+    operator bool() const { return HaveRects(); }
+
+    wxRegionIterator& operator++();
+    wxRegionIterator operator++(int);
+
+    wxCoord GetX() const { return m_rect.GetX(); }
+    wxCoord GetY() const { return m_rect.GetY(); }
+    wxCoord GetW() const { return m_rect.GetWidth(); }
+    wxCoord GetWidth() const { return GetW(); }
+    wxCoord GetH() const { return m_rect.GetHeight(); }
+    wxCoord GetHeight() const { return GetH(); }
+    wxRect GetRect() const { return m_rect; }
+
+private:
+    wxRect m_rect;
+
+    DECLARE_DYNAMIC_CLASS(wxRegionIterator);
+};
+
+#endif // _WX_DFB_REGION_H_