//// TODO: make wxColour a ref-counted object,
//// so pixel values get shared.
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "colour.h"
#endif
#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/motif/private.h"
-#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxColour, wxObject)
-#endif
// Colour
-wxColour::wxColour ()
+void wxColour::Init()
{
- m_isInit = FALSE;
- m_red = m_blue = m_green = 0;
+ m_isInit = false;
+ m_red =
+ m_blue =
+ m_green = 0;
m_pixel = -1;
}
-wxColour::wxColour (unsigned char r, unsigned char g, unsigned char b)
+wxColour::wxColour()
{
- m_red = r;
- m_green = g;
- m_blue = b;
- m_isInit = TRUE;
- m_pixel = -1;
+ Init();
}
-wxColour::wxColour (const wxColour& col)
+wxColour::wxColour(const wxColour& col)
+{
+ *this = col;
+}
+
+wxColour& wxColour::operator =(const wxColour& col)
{
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;
}
-wxColour& wxColour::operator =(const wxColour& col)
+void wxColour::InitFromName(const wxString& name)
{
- 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;
+ if ( wxTheColourDatabase )
+ {
+ wxColour col = wxTheColourDatabase->Find(name);
+ if ( col.Ok() )
+ {
+ *this = col;
+ return;
+ }
+ }
+
+ // leave invalid
+ Init();
}
-wxColour::wxColour (const wxString& col)
+/* static */
+wxColour wxColour::CreateByName(const wxString& name)
{
- wxColour *the_colour = wxTheColourDatabase->FindColour (col);
- if (the_colour)
- {
- m_red = the_colour->Red ();
- m_green = the_colour->Green ();
- m_blue = the_colour->Blue ();
- m_isInit = TRUE;
- }
- else
+ wxColour col;
+
+ Display *dpy = wxGlobalDisplay();
+ WXColormap colormap = wxTheApp->GetMainColormap( dpy );
+ XColor xcol;
+ if ( XParseColor( dpy, (Colormap)colormap, name.mb_str(), &xcol ) )
{
- m_red = 0;
- m_green = 0;
- m_blue = 0;
- m_isInit = FALSE;
+ col.m_red = xcol.red & 0xff;
+ col.m_green = xcol.green & 0xff;
+ col.m_blue = xcol.blue & 0xff;
+ col.m_isInit = TRUE;
+ col.m_pixel = -1;
}
-/* TODO
- m_pixel = PALETTERGB (m_red, m_green, m_blue);
-*/
-}
-wxColour::~wxColour ()
-{
+ return col;
}
-wxColour& wxColour::operator = (const wxString& col)
+wxColour::~wxColour()
{
- wxColour *the_colour = wxTheColourDatabase->FindColour (col);
- if (the_colour)
- {
- m_red = the_colour->Red ();
- m_green = the_colour->Green ();
- m_blue = the_colour->Blue ();
- m_isInit = TRUE;
- }
- else
- {
- m_red = 0;
- m_green = 0;
- m_blue = 0;
- m_isInit = FALSE;
- }
-/* TODO
- m_pixel = PALETTERGB (m_red, m_green, m_blue);
-*/
- return (*this);
}
-void wxColour::Set (unsigned char r, unsigned char g, unsigned char b)
+void wxColour::Set(unsigned char r, unsigned char g, unsigned char b)
{
m_red = r;
m_green = g;
m_blue = b;
- m_isInit = TRUE;
-/* TODO
- m_pixel = PALETTERGB (m_red, m_green, m_blue);
-*/
+ m_isInit = true;
+ m_pixel = -1;
}
// Allocate a colour, or nearest colour, using the given display.
-// If realloc is TRUE, ignore the existing pixel, otherwise just return
+// If realloc is true, ignore the existing pixel, otherwise just return
// the existing one.
-// Returns FALSE if an exact match was not found, TRUE otherwise.
+// Returns the old or allocated pixel.
// 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.
-bool wxColour::AllocColour(WXDisplay* display, bool realloc)
+int wxColour::AllocColour(WXDisplay* display, bool realloc)
{
if ((m_pixel != -1) && !realloc)
- return TRUE;
+ return m_pixel;
XColor color;
color.red = (unsigned short) Red ();
if (!XAllocColor ((Display*) display, (Colormap) cmap, &color))
{
- m_pixel = wxGetBestMatchingPixel((Display*) display, &color,(Colormap) cmap);
- return FALSE;
+ m_pixel = wxGetBestMatchingPixel((Display*) display, &color,(Colormap) cmap);
+ return m_pixel;
}
else
{
- m_pixel = (int) color.pixel;
- return TRUE;
+ m_pixel = (int) color.pixel;
+ return m_pixel;
}
}
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.
+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.
+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.
+ 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);
+ cmap = (Colormap) wxTheApp->GetMainColormap(display);
int numPixVals = XDisplayCells(display, DefaultScreen (display));
int mindist = 256 * 256 * 3;
int delta_blue = blue - (matching_color.blue >> 8);
int dist = delta_red * delta_red +
- delta_green * delta_green +
- delta_blue * delta_blue;
+ delta_green * delta_green +
+ delta_blue * delta_blue;
if (dist <= threshold)
{
projects / wxWidgets.git / blobdiff