src/gtk/region.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/gtk/region.cpp
// Purpose:
// Author:      Robert Roebling
// Modified:    VZ at 05.10.00: use AllocExclusive(), comparison fixed
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#include "wx/region.h"

#include <gdk/gdk.h>

// ----------------------------------------------------------------------------
// wxRegionRefData: private class containing the information about the region
// ----------------------------------------------------------------------------

class wxRegionRefData : public wxGDIRefData
{
public:
    wxRegionRefData()
    {
        m_region = NULL;
    }

    wxRegionRefData(const wxRegionRefData& refData)
        : wxGDIRefData()
    {
#ifdef __WXGTK3__
        m_region = cairo_region_copy(refData.m_region);
#else
        m_region = gdk_region_copy(refData.m_region);
#endif
    }

    virtual ~wxRegionRefData()
    {
        if (m_region)
        {
#ifdef __WXGTK3__
            cairo_region_destroy(m_region);
#else
            gdk_region_destroy( m_region );
#endif
        }
    }

#ifdef __WXGTK3__
    cairo_region_t* m_region;
#else
    GdkRegion  *m_region;
#endif
};

// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------

#define M_REGIONDATA static_cast<wxRegionRefData*>(m_refData)
#define M_REGIONDATA_OF(r) static_cast<wxRegionRefData*>(r.m_refData)

IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject)

// ----------------------------------------------------------------------------
// wxRegion construction
// ----------------------------------------------------------------------------

void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
{
    GdkRectangle rect;
    rect.x = x;
    rect.y = y;
    rect.width = w;
    rect.height = h;

    m_refData = new wxRegionRefData();

#ifdef __WXGTK3__
    M_REGIONDATA->m_region = cairo_region_create_rectangle(&rect);
#else
    M_REGIONDATA->m_region = gdk_region_rectangle( &rect );
#endif
}

#ifndef __WXGTK3__
wxRegion::wxRegion(const GdkRegion* region)
{
    m_refData = new wxRegionRefData();
    M_REGIONDATA->m_region = gdk_region_copy(const_cast<GdkRegion*>(region));
}
#endif

wxRegion::wxRegion( size_t n, const wxPoint *points,
                    wxPolygonFillMode fillStyle )
{
#ifdef __WXGTK3__
    // Make a cairo path from the points, draw it onto an image surface, use
    // gdk_cairo_region_create_from_surface() to get a cairo region

    // need at least 3 points to make a useful polygon
    if (n < 3)
        return;
    // get bounding rect
    int min_x = points[0].x;
    int max_x = min_x;
    int min_y = points[0].y;
    int max_y = min_y;
    size_t i;
    for (i = 1; i < n; i++)
    {
        const int x = points[i].x;
        if (min_x > x)
            min_x = x;
        else if (max_x < x)
            max_x = x;
        const int y = points[i].y;
        if (min_y > y)
            min_y = y;
        else if (max_y < y)
            max_y = y;
    }
    const int w = max_x - min_x + 1;
    const int h = max_y - min_y + 1;
    // make surface just big enough to contain polygon (A1 is native format
    //   for gdk_cairo_region_create_from_surface)
    cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_A1, w, h);
    memset(cairo_image_surface_get_data(surface), 0, cairo_image_surface_get_stride(surface) * h);
    cairo_surface_mark_dirty(surface);
    cairo_surface_set_device_offset(surface, -min_x, -min_y);
    cairo_t* cr = cairo_create(surface);
    cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
    if (fillStyle == wxODDEVEN_RULE)
        cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD);
    // make path
    cairo_move_to(cr, points[0].x, points[0].y);
    for (i = 1; i < n; i++)
        cairo_line_to(cr, points[i].x, points[i].y);
    cairo_close_path(cr);
    cairo_fill(cr);
    cairo_destroy(cr);
    cairo_surface_flush(surface);
    m_refData = new wxRegionRefData;
    M_REGIONDATA->m_region = gdk_cairo_region_create_from_surface(surface);
    cairo_surface_destroy(surface);
#else
    GdkPoint *gdkpoints = new GdkPoint[n];
    for ( size_t i = 0 ; i < n ; i++ )
    {
        gdkpoints[i].x = points[i].x;
        gdkpoints[i].y = points[i].y;
    }

    m_refData = new wxRegionRefData();

    GdkRegion* reg = gdk_region_polygon
                     (
                        gdkpoints,
                        n,
                        fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
                                                    : GDK_EVEN_ODD_RULE
                     );

    M_REGIONDATA->m_region = reg;

    delete [] gdkpoints;
#endif
}

wxRegion::~wxRegion()
{
    // m_refData unrefed in ~wxObject
}

wxGDIRefData *wxRegion::CreateGDIRefData() const
{
    // should never be called
    wxFAIL;
    return NULL;
}

wxGDIRefData *wxRegion::CloneGDIRefData(const wxGDIRefData *data) const
{
    return new wxRegionRefData(*static_cast<const wxRegionRefData*>(data));
}

// ----------------------------------------------------------------------------
// wxRegion comparison
// ----------------------------------------------------------------------------

bool wxRegion::DoIsEqual(const wxRegion& region) const
{
#ifdef __WXGTK3__
    return cairo_region_equal(
        M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
#else
    return gdk_region_equal(M_REGIONDATA->m_region,
                            M_REGIONDATA_OF(region)->m_region) != 0;
#endif
}

// ----------------------------------------------------------------------------
// wxRegion operations
// ----------------------------------------------------------------------------

void wxRegion::Clear()
{
    UnRef();
}

bool wxRegion::DoUnionWithRect(const wxRect& r)
{
    // workaround for a strange GTK/X11 bug: taking union with an empty
    // rectangle results in an empty region which is definitely not what we
    // want
    if ( r.IsEmpty() )
        return true;

    if ( !m_refData )
    {
        InitRect(r.x, r.y, r.width, r.height);
    }
    else
    {
        AllocExclusive();

        GdkRectangle rect;
        rect.x = r.x;
        rect.y = r.y;
        rect.width = r.width;
        rect.height = r.height;

#ifdef __WXGTK3__
        cairo_region_union_rectangle(M_REGIONDATA->m_region, &rect);
#else
        gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
#endif
    }

    return true;
}

bool wxRegion::DoUnionWithRegion( const wxRegion& region )
{
    if (region.m_refData == NULL)
        { }
    else if (m_refData == NULL)
    {
        m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region));
    }
    else
    {
        AllocExclusive();
#ifdef __WXGTK3__
        cairo_region_union(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
#else
        gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
#endif
    }

    return true;
}

bool wxRegion::DoIntersect( const wxRegion& region )
{
    if (region.m_refData == NULL || m_refData == NULL)
        return false;

    AllocExclusive();

#ifdef __WXGTK3__
    cairo_region_intersect(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
#else
    gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
#endif

    return true;
}

bool wxRegion::DoSubtract( const wxRegion& region )
{
    if (region.m_refData == NULL || m_refData == NULL)
        return false;

    AllocExclusive();

#ifdef __WXGTK3__
    cairo_region_subtract(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
#else
    gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
#endif

    return true;
}

bool wxRegion::DoXor( const wxRegion& region )
{
    if (region.m_refData == NULL)
        { }
    else if (m_refData == NULL)
    {
        // XOR-ing with an invalid region is the same as XOR-ing with an empty
        // one, i.e. it is simply a copy.
        m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region));
    }
    else
    {
        AllocExclusive();

#ifdef __WXGTK3__
        cairo_region_xor(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
#else
        gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
#endif
    }

    return true;
}

bool wxRegion::DoOffset( wxCoord x, wxCoord y )
{
    wxCHECK_MSG( m_refData, false, wxS("invalid region") );

    AllocExclusive();

#ifdef __WXGTK3__
    cairo_region_translate(M_REGIONDATA->m_region, x, y);
#else
    gdk_region_offset( M_REGIONDATA->m_region, x, y );
#endif

    return true;
}

// ----------------------------------------------------------------------------
// wxRegion tests
// ----------------------------------------------------------------------------

bool wxRegion::DoGetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
{
    if ( m_refData )
    {
        GdkRectangle rect;
#ifdef __WXGTK3__
        cairo_region_get_extents(M_REGIONDATA->m_region, &rect);
#else
        gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
#endif
        x = rect.x;
        y = rect.y;
        w = rect.width;
        h = rect.height;

        return true;
    }
    else
    {
        x = 0;
        y = 0;
        w = -1;
        h = -1;

        return false;
    }
}

bool wxRegion::IsEmpty() const
{
#ifdef __WXGTK3__
    return m_refData == NULL || cairo_region_is_empty(M_REGIONDATA->m_region);
#else
    return m_refData == NULL || gdk_region_empty(M_REGIONDATA->m_region);
#endif
}

wxRegionContain wxRegion::DoContainsPoint( wxCoord x, wxCoord y ) const
{
#ifdef __WXGTK3__
    if (m_refData == NULL || !cairo_region_contains_point(M_REGIONDATA->m_region, x, y))
#else
    if (m_refData == NULL || !gdk_region_point_in(M_REGIONDATA->m_region, x, y))
#endif
        return wxOutRegion;

    return wxInRegion;
}

wxRegionContain wxRegion::DoContainsRect(const wxRect& r) const
{
    if (!m_refData)
        return wxOutRegion;

    GdkRectangle rect;
    rect.x = r.x;
    rect.y = r.y;
    rect.width = r.width;
    rect.height = r.height;
#ifdef __WXGTK3__
    switch (cairo_region_contains_rectangle(M_REGIONDATA->m_region, &rect))
    {
        case CAIRO_REGION_OVERLAP_IN:   return wxInRegion;
        case CAIRO_REGION_OVERLAP_PART: return wxPartRegion;
        default: break;
    }
#else
    GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
    switch (res)
    {
        case GDK_OVERLAP_RECTANGLE_IN:   return wxInRegion;
        case GDK_OVERLAP_RECTANGLE_OUT:  return wxOutRegion;
        case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
    }
#endif
    return wxOutRegion;
}

#ifdef __WXGTK3__
cairo_region_t* wxRegion::GetRegion() const
#else
GdkRegion *wxRegion::GetRegion() const
#endif
{
    if (!m_refData)
        return NULL;

    return M_REGIONDATA->m_region;
}

// ----------------------------------------------------------------------------
// wxRegionIterator
// ----------------------------------------------------------------------------

wxRegionIterator::wxRegionIterator()
{
    Init();
    Reset();
}

wxRegionIterator::wxRegionIterator( const wxRegion& region )
{
    Init();
    Reset(region);
}

void wxRegionIterator::Init()
{
    m_rects = NULL;
    m_numRects = 0;
}

wxRegionIterator::~wxRegionIterator()
{
    wxDELETEA(m_rects);
}

void wxRegionIterator::CreateRects( const wxRegion& region )
{
    wxDELETEA(m_rects);
    m_numRects = 0;

#ifdef __WXGTK3__
    cairo_region_t* cairoRegion = region.GetRegion();
    if (cairoRegion == NULL)
        return;
    m_numRects = cairo_region_num_rectangles(cairoRegion);

    if (m_numRects)
    {
        m_rects = new wxRect[m_numRects];
        for (int i = 0; i < m_numRects; i++)
        {
            GdkRectangle gr;
            cairo_region_get_rectangle(cairoRegion, i, &gr);
            wxRect &wr = m_rects[i];
            wr.x = gr.x;
            wr.y = gr.y;
            wr.width = gr.width;
            wr.height = gr.height;
        }
    }
#else
    GdkRegion *gdkregion = region.GetRegion();
    if (!gdkregion)
        return;

    GdkRectangle* gdkrects;
    gdk_region_get_rectangles(gdkregion, &gdkrects, &m_numRects);

    if (m_numRects)
    {
        m_rects = new wxRect[m_numRects];
        for (int i = 0; i < m_numRects; ++i)
        {
            GdkRectangle &gr = gdkrects[i];
            wxRect &wr = m_rects[i];
            wr.x = gr.x;
            wr.y = gr.y;
            wr.width = gr.width;
            wr.height = gr.height;
        }
    }
    g_free( gdkrects );
#endif
}

void wxRegionIterator::Reset( const wxRegion& region )
{
    m_region = region;
    CreateRects(region);
    Reset();
}

bool wxRegionIterator::HaveRects() const
{
    return m_current < m_numRects;
}

wxRegionIterator& wxRegionIterator::operator ++ ()
{
    if (HaveRects())
        ++m_current;

    return *this;
}

wxRegionIterator wxRegionIterator::operator ++ (int)
{
    wxRegionIterator tmp = *this;

    if (HaveRects())
        ++m_current;

    return tmp;
}

wxCoord wxRegionIterator::GetX() const
{
    wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );

    return m_rects[m_current].x;
}

wxCoord wxRegionIterator::GetY() const
{
    wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );

    return m_rects[m_current].y;
}

wxCoord wxRegionIterator::GetW() const
{
    wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );

    return m_rects[m_current].width;
}

wxCoord wxRegionIterator::GetH() const
{
    wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );

    return m_rects[m_current].height;
}

wxRect wxRegionIterator::GetRect() const
{
    wxRect r;
    if( HaveRects() )
        r = m_rects[m_current];

    return r;
}

wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& ri)
{
    if (this != &ri)
    {
        wxDELETEA(m_rects);

        m_current = ri.m_current;
        m_numRects = ri.m_numRects;
        if ( m_numRects )
        {
            m_rects = new wxRect[m_numRects];
            memcpy(m_rects, ri.m_rects, m_numRects * sizeof m_rects[0]);
        }
    }
    return *this;
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/gtk/region.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Modified: VZ at 05.10.00: use AllocExclusive(), comparison fixed
	6	// Copyright: (c) 1998 Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	// ============================================================================
	11	// declarations
	12	// ============================================================================
	13
	14	// ----------------------------------------------------------------------------
	15	// headers
	16	// ----------------------------------------------------------------------------
	17
	18	// For compilers that support precompilation, includes "wx.h".
	19	#include "wx/wxprec.h"
	20
	21	#include "wx/region.h"
	22
	23	#include <gdk/gdk.h>
	24
	25	// ----------------------------------------------------------------------------
	26	// wxRegionRefData: private class containing the information about the region
	27	// ----------------------------------------------------------------------------
	28
	29	class wxRegionRefData : public wxGDIRefData
	30	{
	31	public:
	32	wxRegionRefData()
	33	{
	34	m_region = NULL;
	35	}
	36
	37	wxRegionRefData(const wxRegionRefData& refData)
	38	: wxGDIRefData()
	39	{
	40	#ifdef __WXGTK3__
	41	m_region = cairo_region_copy(refData.m_region);
	42	#else
	43	m_region = gdk_region_copy(refData.m_region);
	44	#endif
	45	}
	46
	47	virtual ~wxRegionRefData()
	48	{
	49	if (m_region)
	50	{
	51	#ifdef __WXGTK3__
	52	cairo_region_destroy(m_region);
	53	#else
	54	gdk_region_destroy( m_region );
	55	#endif
	56	}
	57	}
	58
	59	#ifdef __WXGTK3__
	60	cairo_region_t* m_region;
	61	#else
	62	GdkRegion *m_region;
	63	#endif
	64	};
	65
	66	// ----------------------------------------------------------------------------
	67	// macros
	68	// ----------------------------------------------------------------------------
	69
	70	#define M_REGIONDATA static_cast<wxRegionRefData*>(m_refData)
	71	#define M_REGIONDATA_OF(r) static_cast<wxRegionRefData*>(r.m_refData)
	72
	73	IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
	74	IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject)
	75
	76	// ----------------------------------------------------------------------------
	77	// wxRegion construction
	78	// ----------------------------------------------------------------------------
	79
	80	void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
	81	{
	82	GdkRectangle rect;
	83	rect.x = x;
	84	rect.y = y;
	85	rect.width = w;
	86	rect.height = h;
	87
	88	m_refData = new wxRegionRefData();
	89
	90	#ifdef __WXGTK3__
	91	M_REGIONDATA->m_region = cairo_region_create_rectangle(&rect);
	92	#else
	93	M_REGIONDATA->m_region = gdk_region_rectangle( &rect );
	94	#endif
	95	}
	96
	97	#ifndef __WXGTK3__
	98	wxRegion::wxRegion(const GdkRegion* region)
	99	{
	100	m_refData = new wxRegionRefData();
	101	M_REGIONDATA->m_region = gdk_region_copy(const_cast<GdkRegion*>(region));
	102	}
	103	#endif
	104
	105	wxRegion::wxRegion( size_t n, const wxPoint *points,
	106	wxPolygonFillMode fillStyle )
	107	{
	108	#ifdef __WXGTK3__
	109	// Make a cairo path from the points, draw it onto an image surface, use
	110	// gdk_cairo_region_create_from_surface() to get a cairo region
	111
	112	// need at least 3 points to make a useful polygon
	113	if (n < 3)
	114	return;
	115	// get bounding rect
	116	int min_x = points[0].x;
	117	int max_x = min_x;
	118	int min_y = points[0].y;
	119	int max_y = min_y;
	120	size_t i;
	121	for (i = 1; i < n; i++)
	122	{
	123	const int x = points[i].x;
	124	if (min_x > x)
	125	min_x = x;
	126	else if (max_x < x)
	127	max_x = x;
	128	const int y = points[i].y;
	129	if (min_y > y)
	130	min_y = y;
	131	else if (max_y < y)
	132	max_y = y;
	133	}
	134	const int w = max_x - min_x + 1;
	135	const int h = max_y - min_y + 1;
	136	// make surface just big enough to contain polygon (A1 is native format
	137	// for gdk_cairo_region_create_from_surface)
	138	cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_A1, w, h);
	139	memset(cairo_image_surface_get_data(surface), 0, cairo_image_surface_get_stride(surface) * h);
	140	cairo_surface_mark_dirty(surface);
	141	cairo_surface_set_device_offset(surface, -min_x, -min_y);
	142	cairo_t* cr = cairo_create(surface);
	143	cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
	144	if (fillStyle == wxODDEVEN_RULE)
	145	cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD);
	146	// make path
	147	cairo_move_to(cr, points[0].x, points[0].y);
	148	for (i = 1; i < n; i++)
	149	cairo_line_to(cr, points[i].x, points[i].y);
	150	cairo_close_path(cr);
	151	cairo_fill(cr);
	152	cairo_destroy(cr);
	153	cairo_surface_flush(surface);
	154	m_refData = new wxRegionRefData;
	155	M_REGIONDATA->m_region = gdk_cairo_region_create_from_surface(surface);
	156	cairo_surface_destroy(surface);
	157	#else
	158	GdkPoint *gdkpoints = new GdkPoint[n];
	159	for ( size_t i = 0 ; i < n ; i++ )
	160	{
	161	gdkpoints[i].x = points[i].x;
	162	gdkpoints[i].y = points[i].y;
	163	}
	164
	165	m_refData = new wxRegionRefData();
	166
	167	GdkRegion* reg = gdk_region_polygon
	168	(
	169	gdkpoints,
	170	n,
	171	fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
	172	: GDK_EVEN_ODD_RULE
	173	);
	174
	175	M_REGIONDATA->m_region = reg;
	176
	177	delete [] gdkpoints;
	178	#endif
	179	}
	180
	181	wxRegion::~wxRegion()
	182	{
	183	// m_refData unrefed in ~wxObject
	184	}
	185
	186	wxGDIRefData *wxRegion::CreateGDIRefData() const
	187	{
	188	// should never be called
	189	wxFAIL;
	190	return NULL;
	191	}
	192
	193	wxGDIRefData wxRegion::CloneGDIRefData(const wxGDIRefData data) const
	194	{
	195	return new wxRegionRefData(static_cast<const wxRegionRefData>(data));
	196	}
	197
	198	// ----------------------------------------------------------------------------
	199	// wxRegion comparison
	200	// ----------------------------------------------------------------------------
	201
	202	bool wxRegion::DoIsEqual(const wxRegion& region) const
	203	{
	204	#ifdef __WXGTK3__
	205	return cairo_region_equal(
	206	M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
	207	#else
	208	return gdk_region_equal(M_REGIONDATA->m_region,
	209	M_REGIONDATA_OF(region)->m_region) != 0;
	210	#endif
	211	}
	212
	213	// ----------------------------------------------------------------------------
	214	// wxRegion operations
	215	// ----------------------------------------------------------------------------
	216
	217	void wxRegion::Clear()
	218	{
	219	UnRef();
	220	}
	221
	222	bool wxRegion::DoUnionWithRect(const wxRect& r)
	223	{
	224	// workaround for a strange GTK/X11 bug: taking union with an empty
	225	// rectangle results in an empty region which is definitely not what we
	226	// want
	227	if ( r.IsEmpty() )
	228	return true;
	229
	230	if ( !m_refData )
	231	{
	232	InitRect(r.x, r.y, r.width, r.height);
	233	}
	234	else
	235	{
	236	AllocExclusive();
	237
	238	GdkRectangle rect;
	239	rect.x = r.x;
	240	rect.y = r.y;
	241	rect.width = r.width;
	242	rect.height = r.height;
	243
	244	#ifdef __WXGTK3__
	245	cairo_region_union_rectangle(M_REGIONDATA->m_region, &rect);
	246	#else
	247	gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
	248	#endif
	249	}
	250
	251	return true;
	252	}
	253
	254	bool wxRegion::DoUnionWithRegion( const wxRegion& region )
	255	{
	256	if (region.m_refData == NULL)
	257	{ }
	258	else if (m_refData == NULL)
	259	{
	260	m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region));
	261	}
	262	else
	263	{
	264	AllocExclusive();
	265	#ifdef __WXGTK3__
	266	cairo_region_union(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
	267	#else
	268	gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
	269	#endif
	270	}
	271
	272	return true;
	273	}
	274
	275	bool wxRegion::DoIntersect( const wxRegion& region )
	276	{
	277	if (region.m_refData == NULL \|\| m_refData == NULL)
	278	return false;
	279
	280	AllocExclusive();
	281
	282	#ifdef __WXGTK3__
	283	cairo_region_intersect(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
	284	#else
	285	gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
	286	#endif
	287
	288	return true;
	289	}
	290
	291	bool wxRegion::DoSubtract( const wxRegion& region )
	292	{
	293	if (region.m_refData == NULL \|\| m_refData == NULL)
	294	return false;
	295
	296	AllocExclusive();
	297
	298	#ifdef __WXGTK3__
	299	cairo_region_subtract(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
	300	#else
	301	gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
	302	#endif
	303
	304	return true;
	305	}
	306
	307	bool wxRegion::DoXor( const wxRegion& region )
	308	{
	309	if (region.m_refData == NULL)
	310	{ }
	311	else if (m_refData == NULL)
	312	{
	313	// XOR-ing with an invalid region is the same as XOR-ing with an empty
	314	// one, i.e. it is simply a copy.
	315	m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region));
	316	}
	317	else
	318	{
	319	AllocExclusive();
	320
	321	#ifdef __WXGTK3__
	322	cairo_region_xor(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
	323	#else
	324	gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
	325	#endif
	326	}
	327
	328	return true;
	329	}
	330
	331	bool wxRegion::DoOffset( wxCoord x, wxCoord y )
	332	{
	333	wxCHECK_MSG( m_refData, false, wxS("invalid region") );
	334
	335	AllocExclusive();
	336
	337	#ifdef __WXGTK3__
	338	cairo_region_translate(M_REGIONDATA->m_region, x, y);
	339	#else
	340	gdk_region_offset( M_REGIONDATA->m_region, x, y );
	341	#endif
	342
	343	return true;
	344	}
	345
	346	// ----------------------------------------------------------------------------
	347	// wxRegion tests
	348	// ----------------------------------------------------------------------------
	349
	350	bool wxRegion::DoGetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
	351	{
	352	if ( m_refData )
	353	{
	354	GdkRectangle rect;
	355	#ifdef __WXGTK3__
	356	cairo_region_get_extents(M_REGIONDATA->m_region, &rect);
	357	#else
	358	gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
	359	#endif
	360	x = rect.x;
	361	y = rect.y;
	362	w = rect.width;
	363	h = rect.height;
	364
	365	return true;
	366	}
	367	else
	368	{
	369	x = 0;
	370	y = 0;
	371	w = -1;
	372	h = -1;
	373
	374	return false;
	375	}
	376	}
	377
	378	bool wxRegion::IsEmpty() const
	379	{
	380	#ifdef __WXGTK3__
	381	return m_refData == NULL \|\| cairo_region_is_empty(M_REGIONDATA->m_region);
	382	#else
	383	return m_refData == NULL \|\| gdk_region_empty(M_REGIONDATA->m_region);
	384	#endif
	385	}
	386
	387	wxRegionContain wxRegion::DoContainsPoint( wxCoord x, wxCoord y ) const
	388	{
	389	#ifdef __WXGTK3__
	390	if (m_refData == NULL \|\| !cairo_region_contains_point(M_REGIONDATA->m_region, x, y))
	391	#else
	392	if (m_refData == NULL \|\| !gdk_region_point_in(M_REGIONDATA->m_region, x, y))
	393	#endif
	394	return wxOutRegion;
	395
	396	return wxInRegion;
	397	}
	398
	399	wxRegionContain wxRegion::DoContainsRect(const wxRect& r) const
	400	{
	401	if (!m_refData)
	402	return wxOutRegion;
	403
	404	GdkRectangle rect;
	405	rect.x = r.x;
	406	rect.y = r.y;
	407	rect.width = r.width;
	408	rect.height = r.height;
	409	#ifdef __WXGTK3__
	410	switch (cairo_region_contains_rectangle(M_REGIONDATA->m_region, &rect))
	411	{
	412	case CAIRO_REGION_OVERLAP_IN: return wxInRegion;
	413	case CAIRO_REGION_OVERLAP_PART: return wxPartRegion;
	414	default: break;
	415	}
	416	#else
	417	GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
	418	switch (res)
	419	{
	420	case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion;
	421	case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion;
	422	case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
	423	}
	424	#endif
	425	return wxOutRegion;
	426	}
	427
	428	#ifdef __WXGTK3__
	429	cairo_region_t* wxRegion::GetRegion() const
	430	#else
	431	GdkRegion *wxRegion::GetRegion() const
	432	#endif
	433	{
	434	if (!m_refData)
	435	return NULL;
	436
	437	return M_REGIONDATA->m_region;
	438	}
	439
	440	// ----------------------------------------------------------------------------
	441	// wxRegionIterator
	442	// ----------------------------------------------------------------------------
	443
	444	wxRegionIterator::wxRegionIterator()
	445	{
	446	Init();
	447	Reset();
	448	}
	449
	450	wxRegionIterator::wxRegionIterator( const wxRegion& region )
	451	{
	452	Init();
	453	Reset(region);
	454	}
	455
	456	void wxRegionIterator::Init()
	457	{
	458	m_rects = NULL;
	459	m_numRects = 0;
	460	}
	461
	462	wxRegionIterator::~wxRegionIterator()
	463	{
	464	wxDELETEA(m_rects);
	465	}
	466
	467	void wxRegionIterator::CreateRects( const wxRegion& region )
	468	{
	469	wxDELETEA(m_rects);
	470	m_numRects = 0;
	471
	472	#ifdef __WXGTK3__
	473	cairo_region_t* cairoRegion = region.GetRegion();
	474	if (cairoRegion == NULL)
	475	return;
	476	m_numRects = cairo_region_num_rectangles(cairoRegion);
	477
	478	if (m_numRects)
	479	{
	480	m_rects = new wxRect[m_numRects];
	481	for (int i = 0; i < m_numRects; i++)
	482	{
	483	GdkRectangle gr;
	484	cairo_region_get_rectangle(cairoRegion, i, &gr);
	485	wxRect &wr = m_rects[i];
	486	wr.x = gr.x;
	487	wr.y = gr.y;
	488	wr.width = gr.width;
	489	wr.height = gr.height;
	490	}
	491	}
	492	#else
	493	GdkRegion *gdkregion = region.GetRegion();
	494	if (!gdkregion)
	495	return;
	496
	497	GdkRectangle* gdkrects;
	498	gdk_region_get_rectangles(gdkregion, &gdkrects, &m_numRects);
	499
	500	if (m_numRects)
	501	{
	502	m_rects = new wxRect[m_numRects];
	503	for (int i = 0; i < m_numRects; ++i)
	504	{
	505	GdkRectangle &gr = gdkrects[i];
	506	wxRect &wr = m_rects[i];
	507	wr.x = gr.x;
	508	wr.y = gr.y;
	509	wr.width = gr.width;
	510	wr.height = gr.height;
	511	}
	512	}
	513	g_free( gdkrects );
	514	#endif
	515	}
	516
	517	void wxRegionIterator::Reset( const wxRegion& region )
	518	{
	519	m_region = region;
	520	CreateRects(region);
	521	Reset();
	522	}
	523
	524	bool wxRegionIterator::HaveRects() const
	525	{
	526	return m_current < m_numRects;
	527	}
	528
	529	wxRegionIterator& wxRegionIterator::operator ++ ()
	530	{
	531	if (HaveRects())
	532	++m_current;
	533
	534	return *this;
	535	}
	536
	537	wxRegionIterator wxRegionIterator::operator ++ (int)
	538	{
	539	wxRegionIterator tmp = *this;
	540
	541	if (HaveRects())
	542	++m_current;
	543
	544	return tmp;
	545	}
	546
	547	wxCoord wxRegionIterator::GetX() const
	548	{
	549	wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
	550
	551	return m_rects[m_current].x;
	552	}
	553
	554	wxCoord wxRegionIterator::GetY() const
	555	{
	556	wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
	557
	558	return m_rects[m_current].y;
	559	}
	560
	561	wxCoord wxRegionIterator::GetW() const
	562	{
	563	wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
	564
	565	return m_rects[m_current].width;
	566	}
	567
	568	wxCoord wxRegionIterator::GetH() const
	569	{
	570	wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
	571
	572	return m_rects[m_current].height;
	573	}
	574
	575	wxRect wxRegionIterator::GetRect() const
	576	{
	577	wxRect r;
	578	if( HaveRects() )
	579	r = m_rects[m_current];
	580
	581	return r;
	582	}
	583
	584	wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& ri)
	585	{
	586	if (this != &ri)
	587	{
	588	wxDELETEA(m_rects);
	589
	590	m_current = ri.m_current;
	591	m_numRects = ri.m_numRects;
	592	if ( m_numRects )
	593	{
	594	m_rects = new wxRect[m_numRects];
	595	memcpy(m_rects, ri.m_rects, m_numRects * sizeof m_rects[0]);
	596	}
	597	}
	598	return *this;
	599	}