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dolphin/Externals/wxWidgets3/src/gtk/region.cpp

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/////////////////////////////////////////////////////////////////////////////
// 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;
}
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