/////////////////////////////////////////////////////////////////////////////
// Name: colour.cpp
// Purpose: wxColour class
-// Author: Julian Smart
+// Author: Julian Smart, Robert Roebling
// Modified by:
// Created: 17/09/98
// RCS-ID: $Id$
-// Copyright: (c) Julian Smart
+// Copyright: (c) Julian Smart, Robert Roebling
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-//// TODO: make wxColour a ref-counted object,
-//// so pixel values get shared.
#ifdef __GNUG__
#pragma implementation "colour.h"
#endif
#include "wx/gdicmn.h"
-#include "wx/colour.h"
#include "wx/app.h"
-#ifdef __VMS__
-#pragma message disable nosimpint
-#endif
-#include <Xm/Xm.h>
-#ifdef __VMS__
-#pragma message enable nosimpint
-#endif
-
#include "wx/x11/private.h"
-IMPLEMENT_DYNAMIC_CLASS(wxColour, wxObject)
-
-// Colour
+//-----------------------------------------------------------------------------
+// wxColour
+//-----------------------------------------------------------------------------
-wxColour::wxColour ()
+class wxColourRefData: public wxObjectRefData
{
- m_isInit = FALSE;
- m_red = m_blue = m_green = 0;
- m_pixel = -1;
-}
+public:
+ wxColourRefData()
+ {
+ m_color.red = 0;
+ m_color.green = 0;
+ m_color.blue = 0;
+ m_color.pixel = 0;
+ m_colormap = (WXColormap *) NULL;
+ m_hasPixel = FALSE;
+ }
+ wxColourRefData(const wxColourRefData& data):
+ wxObjectRefData()
+ {
+ m_color = data.m_color;
+ m_colormap = data.m_colormap;
+ m_hasPixel = data.m_hasPixel;
+ }
+
+ ~wxColourRefData()
+ {
+ FreeColour();
+ }
-wxColour::wxColour (unsigned char r, unsigned char g, unsigned char b)
+ bool operator == (const wxColourRefData& data) const
+ {
+ return (m_colormap == data.m_colormap &&
+ m_hasPixel == data.m_hasPixel &&
+ m_color.red == data.m_color.red &&
+ m_color.green == data.m_color.green &&
+ m_color.blue == data.m_color.blue &&
+ m_color.pixel == data.m_color.pixel);
+ }
+
+ void FreeColour();
+ void AllocColour( WXColormap cmap );
+
+ XColor m_color;
+ WXColormap m_colormap;
+ bool m_hasPixel;
+
+ friend class wxColour;
+
+ // reference counter for systems with <= 8-Bit display
+ static unsigned short colMapAllocCounter[ 256 ];
+};
+
+unsigned short wxColourRefData::colMapAllocCounter[ 256 ] =
+{
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+void wxColourRefData::FreeColour()
{
- m_red = r;
- m_green = g;
- m_blue = b;
- m_isInit = TRUE;
- m_pixel = -1;
+ if (!m_colormap)
+ return;
+#if !wxUSE_NANOX
+ if ((wxTheApp->m_visualType == GrayScale) ||
+ (wxTheApp->m_visualType == PseudoColor))
+ {
+ int idx = m_color.pixel;
+ colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] - 1;
+
+ if (colMapAllocCounter[ idx ] == 0)
+ {
+ unsigned long pixel = m_color.pixel;
+ XFreeColors( wxGlobalDisplay(), (Colormap) m_colormap, &pixel, 1, 0 );
+ }
+ }
+#endif
}
-wxColour::wxColour (const wxColour& col)
+void wxColourRefData::AllocColour( WXColormap cmap )
{
- m_red = col.m_red;
- m_green = col.m_green;
- m_blue = col.m_blue;
- m_isInit = col.m_isInit;
- m_pixel = col.m_pixel;
+ if (m_hasPixel && (m_colormap == cmap))
+ return;
+
+ FreeColour();
+
+#if !wxUSE_NANOX
+ if ((wxTheApp->m_visualType == GrayScale) ||
+ (wxTheApp->m_visualType == PseudoColor))
+ {
+ m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
+ int idx = m_color.pixel;
+ colMapAllocCounter[ idx ] = colMapAllocCounter[ idx ] + 1;
+ }
+ else
+#endif
+ {
+ m_hasPixel = XAllocColor( wxGlobalDisplay(), (Colormap) cmap, &m_color );
+ }
+
+ m_colormap = cmap;
}
-wxColour& wxColour::operator =(const wxColour& col)
+//-----------------------------------------------------------------------------
+
+#define M_COLDATA ((wxColourRefData *)m_refData)
+
+#define SHIFT (8*(sizeof(short int)-sizeof(char)))
+
+IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
+
+wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
{
- m_red = col.m_red;
- m_green = col.m_green;
- m_blue = col.m_blue;
- m_isInit = col.m_isInit;
- m_pixel = col.m_pixel;
- return *this;
+ m_refData = new wxColourRefData();
+#if wxUSE_NANOX
+ M_COLDATA->m_color.red = ((unsigned short)red) ;
+ M_COLDATA->m_color.green = ((unsigned short)green) ;
+ M_COLDATA->m_color.blue = ((unsigned short)blue) ;
+#else
+ M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
+ M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
+ M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
+#endif
+ M_COLDATA->m_color.pixel = 0;
}
-void wxColour::InitFromName(const wxString& col)
+void wxColour::InitFromName( const wxString &colourName )
{
- wxColour *the_colour = wxTheColourDatabase->FindColour (col);
- if (the_colour)
+ wxNode *node = (wxNode *) NULL;
+ if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
{
- m_red = the_colour->Red ();
- m_green = the_colour->Green ();
- m_blue = the_colour->Blue ();
- m_pixel = the_colour->m_pixel;
- m_isInit = TRUE;
+ wxColour *col = (wxColour*)node->Data();
+ UnRef();
+ if (col) Ref( *col );
}
else
{
- m_red = 0;
- m_green = 0;
- m_blue = 0;
- m_isInit = FALSE;
+ m_refData = new wxColourRefData();
+
+ M_COLDATA->m_colormap = wxTheApp->GetMainColormap( wxGlobalDisplay() );
+
+ if (!XParseColor( wxGlobalDisplay(), (Colormap) M_COLDATA->m_colormap, colourName.mb_str(), &M_COLDATA->m_color ))
+ {
+ // VZ: asserts are good in general but this one is triggered by
+ // calling wxColourDatabase::FindColour() with an
+ // unrecognized colour name and this can't be avoided from the
+ // user code, so don't give it here
+ //
+ // a better solution would be to changed code in FindColour()
+
+ //wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
+
+ delete m_refData;
+ m_refData = (wxObjectRefData *) NULL;
+ }
}
}
-wxColour::~wxColour ()
+wxColour::~wxColour()
{
}
-void wxColour::Set (unsigned char r, unsigned char g, unsigned char b)
+bool wxColour::operator == ( const wxColour& col ) const
{
- m_red = r;
- m_green = g;
- m_blue = b;
- m_isInit = TRUE;
- m_pixel = -1;
+ if (m_refData == col.m_refData) return TRUE;
+
+ if (!m_refData || !col.m_refData) return FALSE;
+
+ XColor *own = &(((wxColourRefData*)m_refData)->m_color);
+ XColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
+ if (own->red != other->red) return FALSE;
+ if (own->blue != other->blue) return FALSE;
+ if (own->green != other->green) return FALSE;
+
+ return TRUE;
}
-// Allocate a colour, or nearest colour, using the given display.
-// If realloc is TRUE, ignore the existing pixel, otherwise just return
-// the existing one.
-// Returns the old or allocated pixel.
+wxObjectRefData *wxColour::CreateRefData() const
+{
+ return new wxColourRefData;
+}
-// TODO: can this handle mono displays? If not, we should have an extra
-// flag to specify whether this should be black or white by default.
+wxObjectRefData *wxColour::CloneRefData(const wxObjectRefData *data) const
+{
+ return new wxColourRefData(*(wxColourRefData *)data);
+}
-int wxColour::AllocColour(WXDisplay* display, bool realloc)
+void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
{
- if ((m_pixel != -1) && !realloc)
- return m_pixel;
-
- XColor color;
- color.red = (unsigned short) Red ();
- color.red |= color.red << 8;
- color.green = (unsigned short) Green ();
- color.green |= color.green << 8;
- color.blue = (unsigned short) Blue ();
- color.blue |= color.blue << 8;
+ AllocExclusive();
- color.flags = DoRed | DoGreen | DoBlue;
-
- WXColormap cmap = wxTheApp->GetMainColormap(display);
-
- if (!XAllocColor ((Display*) display, (Colormap) cmap, &color))
- {
- m_pixel = wxGetBestMatchingPixel((Display*) display, &color,(Colormap) cmap);
- return m_pixel;
- }
- else
- {
- m_pixel = (int) color.pixel;
- return m_pixel;
- }
+ m_refData = new wxColourRefData();
+#if wxUSE_NANOX
+ M_COLDATA->m_color.red = ((unsigned short)red) ;
+ M_COLDATA->m_color.green = ((unsigned short)green) ;
+ M_COLDATA->m_color.blue = ((unsigned short)blue) ;
+#else
+ M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
+ M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
+ M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
+#endif
+ M_COLDATA->m_color.pixel = 0;
}
-/*-------------------------------------------
-Markus Emmenegger <mege@iqe.ethz.ch>
-Find the pixel value with an assigned color closest to the desired color
-Used if color cell allocation fails
-As the returned pixel value may be in use by another application,
-the color might change anytime.
-But in many cases, that is still better than always using black.
---
-Chris Breeze <chris@hel.co.uk>
-Improvements:
-1) More efficient calculation of RGB distance of colour cell from
-the desired colour. There is no need to take the sqrt of 'dist', and
-since we are only interested in the top 8-bits of R, G and B we
-can perform integer arithmetic.
-2) Attempt to allocate a read-only colour when a close match is found.
-A read-only colour will not change.
-3) Fall back to the closest match if no read-only colours are available.
-
- Possible further improvements:
- 1) Scan the lookup table and sort the colour cells in order of
- increasing
- distance from the desired colour. Then attempt to allocate a
- read-only
- colour starting from the nearest match.
- 2) Linear RGB distance is not a particularly good method of colour
- matching
- (though it is quick). Converting the colour to HLS and then comparing
- may give better matching.
--------------------------------------------*/
-
-int wxGetBestMatchingPixel(Display *display, XColor *desiredColor, Colormap cmap)
-{
- if (cmap == (Colormap) NULL)
- cmap = (Colormap) wxTheApp->GetMainColormap(display);
-
- int numPixVals = XDisplayCells(display, DefaultScreen (display));
- int mindist = 256 * 256 * 3;
- int bestpixel = (int) BlackPixel (display, DefaultScreen (display));
- int red = desiredColor->red >> 8;
- int green = desiredColor->green >> 8;
- int blue = desiredColor->blue >> 8;
- const int threshold = 2 * 2 * 3; // allow an error of up to 2 in R,G & B
-
- for (int pixelcount = 0; pixelcount < numPixVals; pixelcount++)
- {
- XColor matching_color;
- matching_color.pixel = pixelcount;
- XQueryColor(display,cmap,&matching_color);
-
- int delta_red = red - (matching_color.red >> 8);
- int delta_green = green - (matching_color.green >> 8);
- int delta_blue = blue - (matching_color.blue >> 8);
-
- int dist = delta_red * delta_red +
- delta_green * delta_green +
- delta_blue * delta_blue;
-
- if (dist <= threshold)
- {
- // try to allocate a read-only colour...
- if (XAllocColor (display, cmap, &matching_color))
- {
- return matching_color.pixel;
- }
- }
- if (dist < mindist)
- {
- bestpixel = pixelcount;
- mindist = dist;
- }
- }
- return bestpixel;
+unsigned char wxColour::Red() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
+
+#if wxUSE_NANOX
+ return (unsigned char) M_COLDATA->m_color.red ;
+#else
+ return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
+#endif
+}
+
+unsigned char wxColour::Green() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
+
+#if wxUSE_NANOX
+ return (unsigned char) M_COLDATA->m_color.green ;
+#else
+ return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
+#endif
+}
+
+unsigned char wxColour::Blue() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
+
+#if wxUSE_NANOX
+ return (unsigned char) M_COLDATA->m_color.blue ;
+#else
+ return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
+#endif
+}
+
+void wxColour::CalcPixel( WXColormap cmap )
+{
+ wxCHECK_RET( Ok(), wxT("invalid colour") );
+
+ wxCHECK_RET( cmap, wxT("invalid colormap") );
+
+ M_COLDATA->AllocColour( cmap );
+}
+
+unsigned long wxColour::GetPixel() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
+
+ return M_COLDATA->m_color.pixel;
+}
+
+WXColor *wxColour::GetColor() const
+{
+ wxCHECK_MSG( Ok(), (WXColor *) NULL, wxT("invalid colour") );
+
+ return (WXColor*) &M_COLDATA->m_color;
}
projects / wxWidgets.git / blobdiff