src/gtk/region.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/gtk/region.cpp
// Purpose:
// Author:      Robert Roebling
// Modified:    VZ at 05.10.00: use AllocExclusive(), comparison fixed
// Id:          $Id$
// 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	// Id: $Id$
	7	// Copyright: (c) 1998 Robert Roebling
	8	// Licence: wxWindows licence
	9	/////////////////////////////////////////////////////////////////////////////
	10
	11	// ============================================================================
	12	// declarations
	13	// ============================================================================
	14
	15	// ----------------------------------------------------------------------------
	16	// headers
	17	// ----------------------------------------------------------------------------
	18
	19	// For compilers that support precompilation, includes "wx.h".
	20	#include "wx/wxprec.h"
	21
	22	#include "wx/region.h"
	23
	24	#include <gdk/gdk.h>
	25
	26	// ----------------------------------------------------------------------------
	27	// wxRegionRefData: private class containing the information about the region
	28	// ----------------------------------------------------------------------------
	29
	30	class wxRegionRefData : public wxGDIRefData
	31	{
	32	public:
	33	wxRegionRefData()
	34	{
	35	m_region = NULL;
	36	}
	37
	38	wxRegionRefData(const wxRegionRefData& refData)
	39	: wxGDIRefData()
	40	{
	41	#ifdef __WXGTK3__
	42	m_region = cairo_region_copy(refData.m_region);
	43	#else
	44	m_region = gdk_region_copy(refData.m_region);
	45	#endif
	46	}
	47
	48	virtual ~wxRegionRefData()
	49	{
	50	if (m_region)
	51	{
	52	#ifdef __WXGTK3__
	53	cairo_region_destroy(m_region);
	54	#else
	55	gdk_region_destroy( m_region );
	56	#endif
	57	}
	58	}
	59
	60	#ifdef __WXGTK3__
	61	cairo_region_t* m_region;
	62	#else
	63	GdkRegion *m_region;
	64	#endif
	65	};
	66
	67	// ----------------------------------------------------------------------------
	68	// macros
	69	// ----------------------------------------------------------------------------
	70
	71	#define M_REGIONDATA static_cast<wxRegionRefData*>(m_refData)
	72	#define M_REGIONDATA_OF(r) static_cast<wxRegionRefData*>(r.m_refData)
	73
	74	IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
	75	IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject)
	76
	77	// ----------------------------------------------------------------------------
	78	// wxRegion construction
	79	// ----------------------------------------------------------------------------
	80
	81	void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
	82	{
	83	GdkRectangle rect;
	84	rect.x = x;
	85	rect.y = y;
	86	rect.width = w;
	87	rect.height = h;
	88
	89	m_refData = new wxRegionRefData();
	90
	91	#ifdef __WXGTK3__
	92	M_REGIONDATA->m_region = cairo_region_create_rectangle(&rect);
	93	#else
	94	M_REGIONDATA->m_region = gdk_region_rectangle( &rect );
	95	#endif
	96	}
	97
	98	#ifndef __WXGTK3__
	99	wxRegion::wxRegion(const GdkRegion* region)
	100	{
	101	m_refData = new wxRegionRefData();
	102	M_REGIONDATA->m_region = gdk_region_copy(const_cast<GdkRegion*>(region));
	103	}
	104	#endif
	105
	106	wxRegion::wxRegion( size_t n, const wxPoint *points,
	107	wxPolygonFillMode fillStyle )
	108	{
	109	#ifdef __WXGTK3__
	110	// Make a cairo path from the points, draw it onto an image surface, use
	111	// gdk_cairo_region_create_from_surface() to get a cairo region
	112
	113	// need at least 3 points to make a useful polygon
	114	if (n < 3)
	115	return;
	116	// get bounding rect
	117	int min_x = points[0].x;
	118	int max_x = min_x;
	119	int min_y = points[0].y;
	120	int max_y = min_y;
	121	size_t i;
	122	for (i = 1; i < n; i++)
	123	{
	124	const int x = points[i].x;
	125	if (min_x > x)
	126	min_x = x;
	127	else if (max_x < x)
	128	max_x = x;
	129	const int y = points[i].y;
	130	if (min_y > y)
	131	min_y = y;
	132	else if (max_y < y)
	133	max_y = y;
	134	}
	135	const int w = max_x - min_x + 1;
	136	const int h = max_y - min_y + 1;
	137	// make surface just big enough to contain polygon (A1 is native format
	138	// for gdk_cairo_region_create_from_surface)
	139	cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_A1, w, h);
	140	memset(cairo_image_surface_get_data(surface), 0, cairo_image_surface_get_stride(surface) * h);
	141	cairo_surface_mark_dirty(surface);
	142	cairo_surface_set_device_offset(surface, -min_x, -min_y);
	143	cairo_t* cr = cairo_create(surface);
	144	cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
	145	if (fillStyle == wxODDEVEN_RULE)
	146	cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD);
	147	// make path
	148	cairo_move_to(cr, points[0].x, points[0].y);
	149	for (i = 1; i < n; i++)
	150	cairo_line_to(cr, points[i].x, points[i].y);
	151	cairo_close_path(cr);
	152	cairo_fill(cr);
	153	cairo_destroy(cr);
	154	cairo_surface_flush(surface);
	155	m_refData = new wxRegionRefData;
	156	M_REGIONDATA->m_region = gdk_cairo_region_create_from_surface(surface);
	157	cairo_surface_destroy(surface);
	158	#else
	159	GdkPoint *gdkpoints = new GdkPoint[n];
	160	for ( size_t i = 0 ; i < n ; i++ )
	161	{
	162	gdkpoints[i].x = points[i].x;
	163	gdkpoints[i].y = points[i].y;
	164	}
	165
	166	m_refData = new wxRegionRefData();
	167
	168	GdkRegion* reg = gdk_region_polygon
	169	(
	170	gdkpoints,
	171	n,
	172	fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
	173	: GDK_EVEN_ODD_RULE
	174	);
	175
	176	M_REGIONDATA->m_region = reg;
	177
	178	delete [] gdkpoints;
	179	#endif
	180	}
	181
	182	wxRegion::~wxRegion()
	183	{
	184	// m_refData unrefed in ~wxObject
	185	}
	186
	187	wxGDIRefData *wxRegion::CreateGDIRefData() const
	188	{
	189	// should never be called
	190	wxFAIL;
	191	return NULL;
	192	}
	193
	194	wxGDIRefData wxRegion::CloneGDIRefData(const wxGDIRefData data) const
	195	{
	196	return new wxRegionRefData(static_cast<const wxRegionRefData>(data));
	197	}
	198
	199	// ----------------------------------------------------------------------------
	200	// wxRegion comparison
	201	// ----------------------------------------------------------------------------
	202
	203	bool wxRegion::DoIsEqual(const wxRegion& region) const
	204	{
	205	#ifdef __WXGTK3__
	206	return cairo_region_equal(
	207	M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
	208	#else
	209	return gdk_region_equal(M_REGIONDATA->m_region,
	210	M_REGIONDATA_OF(region)->m_region) != 0;
	211	#endif
	212	}
	213
	214	// ----------------------------------------------------------------------------
	215	// wxRegion operations
	216	// ----------------------------------------------------------------------------
	217
	218	void wxRegion::Clear()
	219	{
	220	UnRef();
	221	}
	222
	223	bool wxRegion::DoUnionWithRect(const wxRect& r)
	224	{
	225	// workaround for a strange GTK/X11 bug: taking union with an empty
	226	// rectangle results in an empty region which is definitely not what we
	227	// want
	228	if ( r.IsEmpty() )
	229	return true;
	230
	231	if ( !m_refData )
	232	{
	233	InitRect(r.x, r.y, r.width, r.height);
	234	}
	235	else
	236	{
	237	AllocExclusive();
	238
	239	GdkRectangle rect;
	240	rect.x = r.x;
	241	rect.y = r.y;
	242	rect.width = r.width;
	243	rect.height = r.height;
	244
	245	#ifdef __WXGTK3__
	246	cairo_region_union_rectangle(M_REGIONDATA->m_region, &rect);
	247	#else
	248	gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
	249	#endif
	250	}
	251
	252	return true;
	253	}
	254
	255	bool wxRegion::DoUnionWithRegion( const wxRegion& region )
	256	{
	257	if (region.m_refData == NULL)
	258	{ }
	259	else if (m_refData == NULL)
	260	{
	261	m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region));
	262	}
	263	else
	264	{
	265	AllocExclusive();
	266	#ifdef __WXGTK3__
	267	cairo_region_union(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
	268	#else
	269	gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
	270	#endif
	271	}
	272
	273	return true;
	274	}
	275
	276	bool wxRegion::DoIntersect( const wxRegion& region )
	277	{
	278	if (region.m_refData == NULL \|\| m_refData == NULL)
	279	return false;
	280
	281	AllocExclusive();
	282
	283	#ifdef __WXGTK3__
	284	cairo_region_intersect(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
	285	#else
	286	gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
	287	#endif
	288
	289	return true;
	290	}
	291
	292	bool wxRegion::DoSubtract( const wxRegion& region )
	293	{
	294	if (region.m_refData == NULL \|\| m_refData == NULL)
	295	return false;
	296
	297	AllocExclusive();
	298
	299	#ifdef __WXGTK3__
	300	cairo_region_subtract(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
	301	#else
	302	gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
	303	#endif
	304
	305	return true;
	306	}
	307
	308	bool wxRegion::DoXor( const wxRegion& region )
	309	{
	310	if (region.m_refData == NULL)
	311	{ }
	312	else if (m_refData == NULL)
	313	{
	314	// XOR-ing with an invalid region is the same as XOR-ing with an empty
	315	// one, i.e. it is simply a copy.
	316	m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region));
	317	}
	318	else
	319	{
	320	AllocExclusive();
	321
	322	#ifdef __WXGTK3__
	323	cairo_region_xor(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
	324	#else
	325	gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
	326	#endif
	327	}
	328
	329	return true;
	330	}
	331
	332	bool wxRegion::DoOffset( wxCoord x, wxCoord y )
	333	{
	334	wxCHECK_MSG( m_refData, false, wxS("invalid region") );
	335
	336	AllocExclusive();
	337
	338	#ifdef __WXGTK3__
	339	cairo_region_translate(M_REGIONDATA->m_region, x, y);
	340	#else
	341	gdk_region_offset( M_REGIONDATA->m_region, x, y );
	342	#endif
	343
	344	return true;
	345	}
	346
	347	// ----------------------------------------------------------------------------
	348	// wxRegion tests
	349	// ----------------------------------------------------------------------------
	350
	351	bool wxRegion::DoGetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
	352	{
	353	if ( m_refData )
	354	{
	355	GdkRectangle rect;
	356	#ifdef __WXGTK3__
	357	cairo_region_get_extents(M_REGIONDATA->m_region, &rect);
	358	#else
	359	gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
	360	#endif
	361	x = rect.x;
	362	y = rect.y;
	363	w = rect.width;
	364	h = rect.height;
	365
	366	return true;
	367	}
	368	else
	369	{
	370	x = 0;
	371	y = 0;
	372	w = -1;
	373	h = -1;
	374
	375	return false;
	376	}
	377	}
	378
	379	bool wxRegion::IsEmpty() const
	380	{
	381	#ifdef __WXGTK3__
	382	return m_refData == NULL \|\| cairo_region_is_empty(M_REGIONDATA->m_region);
	383	#else
	384	return m_refData == NULL \|\| gdk_region_empty(M_REGIONDATA->m_region);
	385	#endif
	386	}
	387
	388	wxRegionContain wxRegion::DoContainsPoint( wxCoord x, wxCoord y ) const
	389	{
	390	#ifdef __WXGTK3__
	391	if (m_refData == NULL \|\| !cairo_region_contains_point(M_REGIONDATA->m_region, x, y))
	392	#else
	393	if (m_refData == NULL \|\| !gdk_region_point_in(M_REGIONDATA->m_region, x, y))
	394	#endif
	395	return wxOutRegion;
	396
	397	return wxInRegion;
	398	}
	399
	400	wxRegionContain wxRegion::DoContainsRect(const wxRect& r) const
	401	{
	402	if (!m_refData)
	403	return wxOutRegion;
	404
	405	GdkRectangle rect;
	406	rect.x = r.x;
	407	rect.y = r.y;
	408	rect.width = r.width;
	409	rect.height = r.height;
	410	#ifdef __WXGTK3__
	411	switch (cairo_region_contains_rectangle(M_REGIONDATA->m_region, &rect))
	412	{
	413	case CAIRO_REGION_OVERLAP_IN: return wxInRegion;
	414	case CAIRO_REGION_OVERLAP_PART: return wxPartRegion;
	415	default: break;
	416	}
	417	#else
	418	GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
	419	switch (res)
	420	{
	421	case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion;
	422	case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion;
	423	case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
	424	}
	425	#endif
	426	return wxOutRegion;
	427	}
	428
	429	#ifdef __WXGTK3__
	430	cairo_region_t* wxRegion::GetRegion() const
	431	#else
	432	GdkRegion *wxRegion::GetRegion() const
	433	#endif
	434	{
	435	if (!m_refData)
	436	return NULL;
	437
	438	return M_REGIONDATA->m_region;
	439	}
	440
	441	// ----------------------------------------------------------------------------
	442	// wxRegionIterator
	443	// ----------------------------------------------------------------------------
	444
	445	wxRegionIterator::wxRegionIterator()
	446	{
	447	Init();
	448	Reset();
	449	}
	450
	451	wxRegionIterator::wxRegionIterator( const wxRegion& region )
	452	{
	453	Init();
	454	Reset(region);
	455	}
	456
	457	void wxRegionIterator::Init()
	458	{
	459	m_rects = NULL;
	460	m_numRects = 0;
	461	}
	462
	463	wxRegionIterator::~wxRegionIterator()
	464	{
	465	wxDELETEA(m_rects);
	466	}
	467
	468	void wxRegionIterator::CreateRects( const wxRegion& region )
	469	{
	470	wxDELETEA(m_rects);
	471	m_numRects = 0;
	472
	473	#ifdef __WXGTK3__
	474	cairo_region_t* cairoRegion = region.GetRegion();
	475	if (cairoRegion == NULL)
	476	return;
	477	m_numRects = cairo_region_num_rectangles(cairoRegion);
	478
	479	if (m_numRects)
	480	{
	481	m_rects = new wxRect[m_numRects];
	482	for (int i = 0; i < m_numRects; i++)
	483	{
	484	GdkRectangle gr;
	485	cairo_region_get_rectangle(cairoRegion, i, &gr);
	486	wxRect &wr = m_rects[i];
	487	wr.x = gr.x;
	488	wr.y = gr.y;
	489	wr.width = gr.width;
	490	wr.height = gr.height;
	491	}
	492	}
	493	#else
	494	GdkRegion *gdkregion = region.GetRegion();
	495	if (!gdkregion)
	496	return;
	497
	498	GdkRectangle* gdkrects;
	499	gdk_region_get_rectangles(gdkregion, &gdkrects, &m_numRects);
	500
	501	if (m_numRects)
	502	{
	503	m_rects = new wxRect[m_numRects];
	504	for (int i = 0; i < m_numRects; ++i)
	505	{
	506	GdkRectangle &gr = gdkrects[i];
	507	wxRect &wr = m_rects[i];
	508	wr.x = gr.x;
	509	wr.y = gr.y;
	510	wr.width = gr.width;
	511	wr.height = gr.height;
	512	}
	513	}
	514	g_free( gdkrects );
	515	#endif
	516	}
	517
	518	void wxRegionIterator::Reset( const wxRegion& region )
	519	{
	520	m_region = region;
	521	CreateRects(region);
	522	Reset();
	523	}
	524
	525	bool wxRegionIterator::HaveRects() const
	526	{
	527	return m_current < m_numRects;
	528	}
	529
	530	wxRegionIterator& wxRegionIterator::operator ++ ()
	531	{
	532	if (HaveRects())
	533	++m_current;
	534
	535	return *this;
	536	}
	537
	538	wxRegionIterator wxRegionIterator::operator ++ (int)
	539	{
	540	wxRegionIterator tmp = *this;
	541
	542	if (HaveRects())
	543	++m_current;
	544
	545	return tmp;
	546	}
	547
	548	wxCoord wxRegionIterator::GetX() const
	549	{
	550	wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
	551
	552	return m_rects[m_current].x;
	553	}
	554
	555	wxCoord wxRegionIterator::GetY() const
	556	{
	557	wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
	558
	559	return m_rects[m_current].y;
	560	}
	561
	562	wxCoord wxRegionIterator::GetW() const
	563	{
	564	wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
	565
	566	return m_rects[m_current].width;
	567	}
	568
	569	wxCoord wxRegionIterator::GetH() const
	570	{
	571	wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") );
	572
	573	return m_rects[m_current].height;
	574	}
	575
	576	wxRect wxRegionIterator::GetRect() const
	577	{
	578	wxRect r;
	579	if( HaveRects() )
	580	r = m_rects[m_current];
	581
	582	return r;
	583	}
	584
	585	wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& ri)
	586	{
	587	if (this != &ri)
	588	{
	589	wxDELETEA(m_rects);
	590
	591	m_current = ri.m_current;
	592	m_numRects = ri.m_numRects;
	593	if ( m_numRects )
	594	{
	595	m_rects = new wxRect[m_numRects];
	596	memcpy(m_rects, ri.m_rects, m_numRects * sizeof m_rects[0]);
	597	}
	598	}
	599	return *this;
	600	}