src/motif/palette.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/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 #include <Xm/Xm.h>
  52 #ifdef __VMS__
  53 #pragma message enable nosimpint
  54 #endif
  55 #include "wx/motif/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 = (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             //      XFreeColors(display, cmap, pix_array, pix_array_n, 0);
  95             // Be careful not to free '0' pixels...
  96             int i, j;
  97             for(i=j=0; i<pix_array_n; i=j) {
  98                 while(j<pix_array_n && pix_array[j]!=0) j++;
  99                 if(j > i) XFreeColors(display, cmap, &pix_array[i], j-i, 0);
 100                 while(j<pix_array_n && pix_array[j]==0) j++;
 101             }
 102             delete [] pix_array;
 103         }
 104
 105         if (destroyable)
 106             XFreeColormap(display, cmap);
 107
 108         next = node->GetNext();
 109         m_palettes.Erase(node);
 110         delete c;
 111     }
 112 }
 113
 114 wxPalette::wxPalette()
 115 {
 116 }
 117
 118 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 119 {
 120     Create(n, red, green, blue);
 121 }
 122
 123 wxPalette::~wxPalette()
 124 {
 125 }
 126
 127 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 128 {
 129     UnRef();
 130
 131     if (!n) {
 132         return false;
 133     }
 134
 135     m_refData = new wxPaletteRefData;
 136
 137     XColor xcol;
 138     Display* display = (Display*) wxGetDisplay();
 139
 140     unsigned long *pix_array;
 141     Colormap cmap;
 142     int pix_array_n;
 143
 144     cmap = (Colormap) wxTheApp->GetMainColormap(display);
 145
 146     pix_array = new unsigned long[n];
 147     if (!pix_array)
 148         return false;
 149
 150     pix_array_n = n;
 151     xcol.flags = DoRed | DoGreen | DoBlue;
 152     for(int i = 0; i < n; i++) {
 153         xcol.red = (unsigned short)(red[i] << 8);
 154         xcol.green = (unsigned short)(green[i] << 8);
 155         xcol.blue = (unsigned short)(blue[i] << 8);
 156         pix_array[i] = (XAllocColor(display, cmap, &xcol) == 0) ? 0 : xcol.pixel;
 157     }
 158
 159     wxXPalette *c = new wxXPalette;
 160
 161     c->m_pix_array_n = pix_array_n;
 162     c->m_pix_array = pix_array;
 163     c->m_cmap = (WXColormap) cmap;
 164     c->m_display = (WXDisplay*) display;
 165     c->m_destroyable = false;
 166     M_PALETTEDATA->m_palettes.Append(c);
 167
 168     return true;
 169 }
 170
 171 int wxPalette::GetPixel(unsigned char WXUNUSED(red),
 172                         unsigned char WXUNUSED(green),
 173                         unsigned char WXUNUSED(blue)) const
 174 {
 175     if ( !m_refData )
 176         return wxNOT_FOUND;
 177
 178     // TODO
 179     return wxNOT_FOUND;
 180 }
 181
 182 bool wxPalette::GetRGB(int index, unsigned char *WXUNUSED(red), unsigned char *WXUNUSED(green), unsigned char *WXUNUSED(blue)) const
 183 {
 184     if ( !m_refData )
 185         return false;
 186
 187     if (index < 0 || index > 255)
 188         return false;
 189
 190     // TODO
 191     return false;
 192 }
 193
 194 WXColormap wxPalette::GetXColormap(WXDisplay* display) const
 195 {
 196     if (!M_PALETTEDATA || (M_PALETTEDATA->m_palettes.GetCount() == 0))
 197         return wxTheApp->GetMainColormap(display);
 198
 199     wxList::compatibility_iterator node = M_PALETTEDATA->m_palettes.GetFirst();
 200     if (!display && node)
 201     {
 202         wxXPalette* p = (wxXPalette*) node->GetData();
 203         return p->m_cmap;
 204     }
 205     while (node)
 206     {
 207         wxXPalette* p = (wxXPalette*) node->GetData();
 208         if (p->m_display == display)
 209             return p->m_cmap;
 210
 211         node = node->GetNext();
 212     }
 213
 214     /* Make a new one: */
 215     wxXPalette *c = new wxXPalette;
 216     wxXPalette *first =
 217         (wxXPalette *)M_PALETTEDATA->m_palettes.GetFirst()->GetData();
 218     XColor xcol;
 219     int pix_array_n = first->m_pix_array_n;
 220
 221     c->m_pix_array_n = pix_array_n;
 222     c->m_pix_array = new unsigned long[pix_array_n];
 223     c->m_display = display;
 224     c->m_cmap = wxTheApp->GetMainColormap(display);
 225     c->m_destroyable = false;
 226
 227     xcol.flags = DoRed | DoGreen | DoBlue;
 228     int i;
 229     for (i = 0; i < pix_array_n; i++)
 230     {
 231         xcol.pixel = first->m_pix_array[i];
 232         XQueryColor((Display*) first->m_display,
 233                     (Colormap) first->m_cmap, &xcol);
 234         c->m_pix_array[i] =
 235             (XAllocColor((Display*) display, (Colormap) c->m_cmap, &xcol) == 0)
 236             ? 0 : xcol.pixel;
 237     }
 238
 239     //    wxPalette* nonConstThis = (wxPalette*) this;
 240
 241     M_PALETTEDATA->m_palettes.Append(c);
 242
 243     return c->m_cmap;
 244 }
 245
 246 bool wxPalette::TransferBitmap(void *data, int depth, int size)
 247 {
 248     switch(depth) {
 249     case 8:
 250         {
 251             unsigned char *uptr = (unsigned char *)data;
 252             int pix_array_n;
 253             unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 254             while(size-- > 0)
 255             {
 256                 if((int)*uptr < pix_array_n)
 257                     *uptr = (unsigned char)pix_array[*uptr];
 258                 uptr++;
 259             }
 260
 261             return true;
 262         }
 263     default:
 264         return false;
 265     }
 266 }
 267
 268 bool wxPalette::TransferBitmap8(unsigned char *data, unsigned long sz,
 269                                 void *dest, unsigned int bpp)
 270 {
 271     int pix_array_n;
 272     unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 273     switch(bpp) {
 274     case 8: {
 275         unsigned char *dptr = (unsigned char *)dest;
 276         while(sz-- > 0) {
 277             if((int)*data < pix_array_n)
 278                 *dptr = (unsigned char)pix_array[*data];
 279             data++;
 280             dptr++;
 281         }
 282         break;
 283             }
 284     case 16: {
 285         unsigned short *dptr = (unsigned short *)dest;
 286         while(sz-- > 0) {
 287             if((int)*data < pix_array_n)
 288                 *dptr = (unsigned short)pix_array[*data];
 289             data++;
 290             dptr++;
 291         }
 292         break;
 293              }
 294     case 24: {
 295         struct rgb24 { unsigned char r, g, b; } *dptr = (struct rgb24 *)dest;
 296         while(sz-- > 0) {
 297             if((int)*data < pix_array_n) {
 298                 dptr->r = (unsigned char)(pix_array[*data] & 0xFF);
 299                 dptr->g = (unsigned char)((pix_array[*data] >> 8) & 0xFF);
 300                 dptr->b = (unsigned char)((pix_array[*data] >> 16) & 0xFF);
 301             }
 302             data++;
 303             dptr++;
 304         }
 305         break;
 306              }
 307     case 32: {
 308         unsigned long *dptr = (unsigned long *)dest;
 309         while(sz-- > 0) {
 310             if((int)*data < pix_array_n)
 311                 *dptr = pix_array[*data];
 312             data++;
 313             dptr++;
 314         }
 315         break;
 316              }
 317     default:
 318         return false;
 319     }
 320     return true;
 321 }
 322
 323 unsigned long *wxPalette::GetXPixArray(WXDisplay *display, int *n)
 324 {
 325     if (!M_PALETTEDATA)
 326         return (unsigned long*) 0;
 327     wxList::compatibility_iterator node;
 328
 329     for (node = M_PALETTEDATA->m_palettes.GetFirst(); node;
 330          node = node->GetNext())
 331     {
 332         wxXPalette *c = (wxXPalette *)node->GetData();
 333         if (c->m_display == display)
 334         {
 335             if (n)
 336                 *n = c->m_pix_array_n;
 337             return c->m_pix_array;
 338         }
 339     }
 340
 341     /* Not found; call GetXColormap, which will create it, then this again */
 342     if (GetXColormap(display))
 343         return GetXPixArray(display, n);
 344     else
 345         return (unsigned long*) 0;
 346 }
 347
 348 void wxPalette::PutXColormap(WXDisplay* display, WXColormap cm, bool dp)
 349 {
 350     UnRef();
 351
 352     m_refData = new wxPaletteRefData;
 353
 354     wxXPalette *c = new wxXPalette;
 355
 356     c->m_pix_array_n = 0;
 357     c->m_pix_array = (unsigned long*) NULL;
 358     c->m_display = display;
 359     c->m_cmap = cm;
 360     c->m_destroyable = dp;
 361
 362     M_PALETTEDATA->m_palettes.Append(c);
 363 }