src/x11/palette.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/x11/palette.cpp
   3 // Purpose:     wxPalette
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 /*
  13  * Colour map
  14  *
  15  * When constructed with the default constructor, we start from
  16  * the wxApp::GetMainColormap, allocating additional read-only cells
  17  * in Create().  The cells are freed on the next call to Create()
  18  * or when the destructor is called.
  19  */
  20
  21 /* Wolfram Gloger <u7y22ab@sunmail.lrz-muenchen.de>
  22 I have implemented basic colormap support for the X11 versions of
  23 wxWidgets, notably wxPalette::Create().  The way I did it is to
  24 allocate additional read-only color cells in the default colormap.  In
  25 general you will get arbitrary pixel values assigned to these new
  26 cells and therefore I added a method wxPalette::TransferBitmap()
  27 which maps the pixel values 0..n to the real ones obtained with
  28 Create().  This is only implemented for the popular case of 8-bit
  29 depth.
  30
  31 Allocating read-write color cells would involve installing a private
  32 X11 colormap for a particular window, and AFAIK this is not
  33 recommended; only the window manager should do this...  Also, it is
  34 not the functionality that wxPalette::Create() aims to provide.
  35  */
  36
  37 // for compilers that support precompilation, includes "wx.h".
  38 #include "wx/wxprec.h"
  39
  40 #include "wx/palette.h"
  41
  42 #ifndef WX_PRECOMP
  43     #include "wx/app.h"
  44     #include "wx/utils.h"
  45     #include "wx/window.h"
  46 #endif
  47
  48 #ifdef __VMS__
  49 #pragma message disable nosimpint
  50 #endif
  51
  52 #ifdef __VMS__
  53 #pragma message enable nosimpint
  54 #endif
  55 #include "wx/x11/private.h"
  56
  57 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  58 IMPLEMENT_DYNAMIC_CLASS(wxXPalette, wxObject)
  59
  60 /*
  61 * Palette
  62 *
  63 */
  64
  65 wxXPalette::wxXPalette()
  66 {
  67     m_cmap = (WXColormap) 0;
  68     m_pix_array_n = 0;
  69     m_pix_array = (unsigned long*) 0;
  70     m_display = (WXDisplay*) 0;
  71     m_destroyable = false;
  72 }
  73
  74 wxPaletteRefData::wxPaletteRefData()
  75 {
  76 }
  77
  78 wxPaletteRefData::~wxPaletteRefData()
  79 {
  80     Display *display = NULL;
  81
  82     wxList::compatibility_iterator node, next;
  83
  84     for (node = m_palettes.GetFirst(); node; node = next) {
  85         wxXPalette *c = (wxXPalette *)node->GetData();
  86         unsigned long *pix_array = c->m_pix_array;
  87         Colormap cmap = (Colormap) c->m_cmap;
  88         bool destroyable = c->m_destroyable;
  89         int pix_array_n = c->m_pix_array_n;
  90         display = (Display*) c->m_display;
  91
  92         if (pix_array_n > 0)
  93         {
  94 #if !wxUSE_NANOX
  95             //      XFreeColors(display, cmap, pix_array, pix_array_n, 0);
  96             // Be careful not to free '0' pixels...
  97             int i, j;
  98             for(i=j=0; i<pix_array_n; i=j) {
  99                 while(j<pix_array_n && pix_array[j]!=0) j++;
 100                 if(j > i) XFreeColors(display, cmap, &pix_array[i], j-i, 0);
 101                 while(j<pix_array_n && pix_array[j]==0) j++;
 102             }
 103 #endif
 104             delete [] pix_array;
 105         }
 106
 107         if (destroyable)
 108             XFreeColormap(display, cmap);
 109
 110         next = node->GetNext();
 111         m_palettes.Erase(node);
 112         delete c;
 113     }
 114 }
 115
 116 wxPalette::wxPalette()
 117 {
 118 }
 119
 120 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 121 {
 122     Create(n, red, green, blue);
 123 }
 124
 125 wxPalette::~wxPalette()
 126 {
 127 }
 128
 129 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 130 {
 131     UnRef();
 132
 133     if (!n) {
 134         return false;
 135     }
 136
 137     m_refData = new wxPaletteRefData;
 138
 139     XColor xcol;
 140     Display* display = (Display*) wxGetDisplay();
 141
 142     unsigned long *pix_array;
 143     Colormap cmap;
 144     int pix_array_n;
 145
 146     cmap = (Colormap) wxTheApp->GetMainColormap(display);
 147
 148     pix_array = new unsigned long[n];
 149     if (!pix_array)
 150         return false;
 151
 152     pix_array_n = n;
 153     xcol.flags = DoRed | DoGreen | DoBlue;
 154     for(int i = 0; i < n; i++) {
 155         xcol.red = (unsigned short)red[i] << 8;
 156         xcol.green = (unsigned short)green[i] << 8;
 157         xcol.blue = (unsigned short)blue[i] << 8;
 158         pix_array[i] = (XAllocColor(display, cmap, &xcol) == 0) ? 0 : xcol.pixel;
 159     }
 160
 161     wxXPalette *c = new wxXPalette;
 162
 163     c->m_pix_array_n = pix_array_n;
 164     c->m_pix_array = pix_array;
 165     c->m_cmap = (WXColormap) cmap;
 166     c->m_display = (WXDisplay*) display;
 167     c->m_destroyable = false;
 168     M_PALETTEDATA->m_palettes.Append(c);
 169
 170     return true;
 171 }
 172
 173 wxGDIRefData *wxPalette::CreateGDIRefData() const
 174 {
 175     return new wxPaletteRefData;
 176 }
 177
 178 wxGDIRefData *wxPalette::CloneGDIRefData(const wxGDIRefData *data) const
 179 {
 180     return new wxPaletteRefData(*static_cast<const wxPaletteRefData *>(data));
 181 }
 182
 183 int wxPalette::GetPixel(unsigned char WXUNUSED(red),
 184                         unsigned char WXUNUSED(green),
 185                         unsigned char WXUNUSED(blue)) const
 186 {
 187     if ( !m_refData )
 188         return wxNOT_FOUND;
 189
 190     // TODO
 191     return wxNOT_FOUND;
 192 }
 193
 194 bool wxPalette::GetRGB(int index, unsigned char *WXUNUSED(red), unsigned char *WXUNUSED(green), unsigned char *WXUNUSED(blue)) const
 195 {
 196     if ( !m_refData )
 197         return false;
 198
 199     if (index < 0 || index > 255)
 200         return false;
 201
 202     // TODO
 203     return false;
 204 }
 205
 206 WXColormap wxPalette::GetXColormap(WXDisplay* display) const
 207 {
 208     if (!M_PALETTEDATA || (M_PALETTEDATA->m_palettes.GetCount() == 0))
 209         return wxTheApp->GetMainColormap(display);
 210
 211     wxList::compatibility_iterator node = M_PALETTEDATA->m_palettes.GetFirst();
 212     if (!display && node)
 213     {
 214         wxXPalette* p = (wxXPalette*) node->GetData();
 215         return p->m_cmap;
 216     }
 217     while (node)
 218     {
 219         wxXPalette* p = (wxXPalette*) node->GetData();
 220         if (p->m_display == display)
 221             return p->m_cmap;
 222
 223         node = node->GetNext();
 224     }
 225
 226     /* Make a new one: */
 227     wxXPalette *c = new wxXPalette;
 228     wxXPalette *first = (wxXPalette *)M_PALETTEDATA->m_palettes.GetFirst()->GetData();
 229     XColor xcol;
 230     int pix_array_n = first->m_pix_array_n;
 231
 232     c->m_pix_array_n = pix_array_n;
 233     c->m_pix_array = new unsigned long[pix_array_n];
 234     c->m_display = display;
 235     c->m_cmap = wxTheApp->GetMainColormap(display);
 236     c->m_destroyable = false;
 237
 238     xcol.flags = DoRed | DoGreen | DoBlue;
 239     int i;
 240     for (i = 0; i < pix_array_n; i++)
 241     {
 242         xcol.pixel = first->m_pix_array[i];
 243         XQueryColor((Display*) first->m_display, (Colormap) first->m_cmap, &xcol);
 244         c->m_pix_array[i] =
 245             (XAllocColor((Display*) display, (Colormap) c->m_cmap, &xcol) == 0) ? 0 : xcol.pixel;
 246     }
 247
 248     //    wxPalette* nonConstThis = (wxPalette*) this;
 249
 250     M_PALETTEDATA->m_palettes.Append(c);
 251
 252     return c->m_cmap;
 253 }
 254
 255 bool wxPalette::TransferBitmap(void *data, int depth, int size)
 256 {
 257     switch(depth) {
 258     case 8:
 259         {
 260             unsigned char *uptr = (unsigned char *)data;
 261             int pix_array_n;
 262             unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 263             while(size-- > 0)
 264             {
 265                 if((int)*uptr < pix_array_n)
 266                     *uptr = (unsigned char)pix_array[*uptr];
 267                 uptr++;
 268             }
 269
 270             return true;
 271         }
 272     default:
 273         return false;
 274     }
 275 }
 276
 277 bool wxPalette::TransferBitmap8(unsigned char *data, unsigned long sz,
 278                                 void *dest, unsigned int bpp)
 279 {
 280     int pix_array_n;
 281     unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 282     switch(bpp) {
 283     case 8: {
 284         unsigned char *dptr = (unsigned char *)dest;
 285         while(sz-- > 0) {
 286             if((int)*data < pix_array_n)
 287                 *dptr = (unsigned char)pix_array[*data];
 288             data++;
 289             dptr++;
 290         }
 291         break;
 292             }
 293     case 16: {
 294         unsigned short *dptr = (unsigned short *)dest;
 295         while(sz-- > 0) {
 296             if((int)*data < pix_array_n)
 297                 *dptr = (unsigned short)pix_array[*data];
 298             data++;
 299             dptr++;
 300         }
 301         break;
 302              }
 303     case 24: {
 304         struct rgb24 { unsigned char r, g, b; } *dptr = (struct rgb24 *)dest;
 305         while(sz-- > 0) {
 306             if((int)*data < pix_array_n) {
 307                 dptr->r = pix_array[*data] & 0xFF;
 308                 dptr->g = (pix_array[*data] >> 8) & 0xFF;
 309                 dptr->b = (pix_array[*data] >> 16) & 0xFF;
 310             }
 311             data++;
 312             dptr++;
 313         }
 314         break;
 315              }
 316     case 32: {
 317         unsigned long *dptr = (unsigned long *)dest;
 318         while(sz-- > 0) {
 319             if((int)*data < pix_array_n)
 320                 *dptr = pix_array[*data];
 321             data++;
 322             dptr++;
 323         }
 324         break;
 325              }
 326     default:
 327         return false;
 328     }
 329     return true;
 330 }
 331
 332 unsigned long *wxPalette::GetXPixArray(WXDisplay *display, int *n)
 333 {
 334     if (!M_PALETTEDATA)
 335         return (unsigned long*) 0;
 336     wxList::compatibility_iterator node;
 337
 338     for (node = M_PALETTEDATA->m_palettes.GetFirst(); node; node = node->GetNext())
 339     {
 340         wxXPalette *c = (wxXPalette *)node->GetData();
 341         if (c->m_display == display)
 342         {
 343             if (n)
 344                 *n = c->m_pix_array_n;
 345             return c->m_pix_array;
 346         }
 347     }
 348
 349     /* Not found; call GetXColormap, which will create it, then this again */
 350     if (GetXColormap(display))
 351         return GetXPixArray(display, n);
 352     else
 353         return (unsigned long*) 0;
 354 }
 355
 356 void wxPalette::PutXColormap(WXDisplay* display, WXColormap cm, bool dp)
 357 {
 358     UnRef();
 359
 360     m_refData = new wxPaletteRefData;
 361
 362     wxXPalette *c = new wxXPalette;
 363
 364     c->m_pix_array_n = 0;
 365     c->m_pix_array = (unsigned long*) NULL;
 366     c->m_display = display;
 367     c->m_cmap = cm;
 368     c->m_destroyable = dp;
 369
 370     M_PALETTEDATA->m_palettes.Append(c);
 371 }