src/motif/palette.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 wxWindows, 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 wxColourMap::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 #ifdef __GNUG__
  38 #pragma implementation "palette.h"
  39 #endif
  40
  41 #include "wx/palette.h"
  42 #include "wx/window.h"
  43 #include "wx/app.h"
  44 #include "wx/utils.h"
  45
  46 #include <Xm/Xm.h>
  47 #include "wx/motif/private.h"
  48
  49 #if !USE_SHARED_LIBRARIES
  50 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  51 IMPLEMENT_DYNAMIC_CLASS(wxXPalette, wxObject)
  52 #endif
  53
  54 /*
  55 * Palette
  56 *
  57 */
  58
  59 wxXPalette::wxXPalette()
  60 {
  61     m_cmap = (WXColormap) 0;
  62     m_pix_array_n = 0;
  63     m_pix_array = (unsigned long*) 0;
  64     m_display = (WXDisplay*) 0;
  65     m_destroyable = FALSE;
  66 }
  67
  68 wxPaletteRefData::wxPaletteRefData()
  69 {
  70 }
  71
  72 wxPaletteRefData::~wxPaletteRefData()
  73 {
  74     XColor xcol;
  75     Display *display = (Display*) NULL;
  76
  77     wxNode *node, *next;
  78
  79     for (node = m_palettes.First(); node; node = next) {
  80         wxXPalette *c = (wxXPalette *)node->Data();
  81         unsigned long *pix_array = c->m_pix_array;
  82         Colormap cmap = (Colormap) c->m_cmap;
  83         bool destroyable = c->m_destroyable;
  84         int pix_array_n = c->m_pix_array_n;
  85         display = (Display*) c->m_display;
  86
  87         if (pix_array_n > 0)
  88         {
  89             //      XFreeColors(display, cmap, pix_array, pix_array_n, 0);
  90             // Be careful not to free '0' pixels...
  91             int i, j;
  92             for(i=j=0; i<pix_array_n; i=j) {
  93                 while(j<pix_array_n && pix_array[j]!=0) j++;
  94                 if(j > i) XFreeColors(display, cmap, &pix_array[i], j-i, 0);
  95                 while(j<pix_array_n && pix_array[j]==0) j++;
  96             }
  97             delete [] pix_array;
  98         }
  99
 100         if (destroyable)
 101             XFreeColormap(display, cmap);
 102
 103         next = node->Next();
 104         m_palettes.DeleteNode(node);
 105         delete c;
 106     }
 107 }
 108
 109 wxPalette::wxPalette()
 110 {
 111 }
 112
 113 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 114 {
 115     Create(n, red, green, blue);
 116 }
 117
 118 wxPalette::~wxPalette()
 119 {
 120 }
 121
 122 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 123 {
 124     UnRef();
 125
 126     if (!n) {
 127         return FALSE;
 128     }
 129
 130     m_refData = new wxPaletteRefData;
 131
 132     XColor xcol;
 133     Display* display = (Display*) wxGetDisplay();
 134
 135     unsigned long *pix_array;
 136     Colormap cmap;
 137     int pix_array_n;
 138
 139     cmap = (Colormap) wxTheApp->GetMainColormap(display);
 140
 141     pix_array = new unsigned long[n];
 142     if (!pix_array)
 143         return FALSE;
 144
 145     pix_array_n = n;
 146     xcol.flags = DoRed | DoGreen | DoBlue;
 147     for(int i = 0; i < n; i++) {
 148         xcol.red = (unsigned short)red[i] << 8;
 149         xcol.green = (unsigned short)green[i] << 8;
 150         xcol.blue = (unsigned short)blue[i] << 8;
 151         pix_array[i] = (XAllocColor(display, cmap, &xcol) == 0) ? 0 : xcol.pixel;
 152     }
 153
 154     wxXPalette *c = new wxXPalette;
 155
 156     c->m_pix_array_n = pix_array_n;
 157     c->m_pix_array = pix_array;
 158     c->m_cmap = (WXColormap) cmap;
 159     c->m_display = (WXDisplay*) display;
 160     c->m_destroyable = FALSE;
 161     M_PALETTEDATA->m_palettes.Append(c);
 162
 163     return TRUE;
 164 }
 165
 166 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
 167 {
 168     if ( !m_refData )
 169         return FALSE;
 170
 171     // TODO
 172     return FALSE;
 173 }
 174
 175 bool wxPalette::GetRGB(int index, unsigned char *red, unsigned char *green, unsigned char *blue) const
 176 {
 177     if ( !m_refData )
 178         return FALSE;
 179
 180     if (index < 0 || index > 255)
 181         return FALSE;
 182
 183     // TODO
 184     return FALSE;
 185 }
 186
 187 WXColormap wxPalette::GetXColormap(WXDisplay* display) const
 188 {
 189     if (!M_PALETTEDATA || (M_PALETTEDATA->m_palettes.Number() == 0))
 190         return wxTheApp->GetMainColormap(display);
 191
 192     wxNode* node = M_PALETTEDATA->m_palettes.First();
 193     if (!display && node)
 194     {
 195         wxXPalette* p = (wxXPalette*) node->Data();
 196         return p->m_cmap;
 197     }
 198     while (node)
 199     {
 200         wxXPalette* p = (wxXPalette*) node->Data();
 201         if (p->m_display == display)
 202             return p->m_cmap;
 203
 204         node = node->Next();
 205     }
 206
 207     /* Make a new one: */
 208     wxXPalette *c = new wxXPalette;
 209     wxXPalette *first = (wxXPalette *)M_PALETTEDATA->m_palettes.First()->Data();
 210     XColor xcol;
 211     int pix_array_n = first->m_pix_array_n;
 212
 213     c->m_pix_array_n = pix_array_n;
 214     c->m_pix_array = new unsigned long[pix_array_n];
 215     c->m_display = display;
 216     c->m_cmap = wxTheApp->GetMainColormap(display);
 217     c->m_destroyable = FALSE;
 218
 219     xcol.flags = DoRed | DoGreen | DoBlue;
 220     int i;
 221     for (i = 0; i < pix_array_n; i++)
 222     {
 223         xcol.pixel = first->m_pix_array[i];
 224         XQueryColor((Display*) first->m_display, (Colormap) first->m_cmap, &xcol);
 225         c->m_pix_array[i] =
 226             (XAllocColor((Display*) display, (Colormap) c->m_cmap, &xcol) == 0) ? 0 : xcol.pixel;
 227     }
 228
 229     //    wxPalette* nonConstThis = (wxPalette*) this;
 230
 231     M_PALETTEDATA->m_palettes.Append(c);
 232
 233     return c->m_cmap;
 234 }
 235
 236 bool wxPalette::TransferBitmap(void *data, int depth, int size)
 237 {
 238     switch(depth) {
 239     case 8:
 240         {
 241             unsigned char *uptr = (unsigned char *)data;
 242             int pix_array_n;
 243             unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 244             while(size-- > 0)
 245             {
 246                 if((int)*uptr < pix_array_n)
 247                     *uptr = (unsigned char)pix_array[*uptr];
 248                 uptr++;
 249             }
 250
 251             return TRUE;
 252         }
 253     default:
 254         return FALSE;
 255     }
 256 }
 257
 258 bool wxPalette::TransferBitmap8(unsigned char *data, unsigned long sz,
 259                                 void *dest, unsigned int bpp)
 260 {
 261     int pix_array_n;
 262     unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 263     switch(bpp) {
 264     case 8: {
 265         unsigned char *dptr = (unsigned char *)dest;
 266         while(sz-- > 0) {
 267             if((int)*data < pix_array_n)
 268                 *dptr = (unsigned char)pix_array[*data];
 269             data++;
 270             dptr++;
 271         }
 272         break;
 273             }
 274     case 16: {
 275         unsigned short *dptr = (unsigned short *)dest;
 276         while(sz-- > 0) {
 277             if((int)*data < pix_array_n)
 278                 *dptr = (unsigned short)pix_array[*data];
 279             data++;
 280             dptr++;
 281         }
 282         break;
 283              }
 284     case 24: {
 285         struct rgb24 { unsigned char r, g, b; } *dptr = (struct rgb24 *)dest;
 286         while(sz-- > 0) {
 287             if((int)*data < pix_array_n) {
 288                 dptr->r = pix_array[*data] & 0xFF;
 289                 dptr->g = (pix_array[*data] >> 8) & 0xFF;
 290                 dptr->b = (pix_array[*data] >> 16) & 0xFF;
 291             }
 292             data++;
 293             dptr++;
 294         }
 295         break;
 296              }
 297     case 32: {
 298         unsigned long *dptr = (unsigned long *)dest;
 299         while(sz-- > 0) {
 300             if((int)*data < pix_array_n)
 301                 *dptr = pix_array[*data];
 302             data++;
 303             dptr++;
 304         }
 305         break;
 306              }
 307     default:
 308         return FALSE;
 309     }
 310     return TRUE;
 311 }
 312
 313 unsigned long *wxPalette::GetXPixArray(WXDisplay *display, int *n)
 314 {
 315     if (!M_PALETTEDATA)
 316         return (unsigned long*) 0;
 317     wxNode *node;
 318
 319     for (node = M_PALETTEDATA->m_palettes.First(); node; node = node->Next())
 320     {
 321         wxXPalette *c = (wxXPalette *)node->Data();
 322         if (c->m_display == display)
 323         {
 324             if (n)
 325                 *n = c->m_pix_array_n;
 326             return c->m_pix_array;
 327         }
 328     }
 329
 330     /* Not found; call GetXColormap, which will create it, then this again */
 331     if (GetXColormap(display))
 332         return GetXPixArray(display, n);
 333     else
 334         return (unsigned long*) 0;
 335 }
 336
 337 void wxPalette::PutXColormap(WXDisplay* display, WXColormap cm, bool dp)
 338 {
 339     UnRef();
 340
 341     m_refData = new wxPaletteRefData;
 342
 343     wxXPalette *c = new wxXPalette;
 344
 345     c->m_pix_array_n = 0;
 346     c->m_pix_array = (unsigned long*) NULL;
 347     c->m_display = display;
 348     c->m_cmap = cm;
 349     c->m_destroyable = dp;
 350
 351     M_PALETTEDATA->m_palettes.Append(c);
 352 }
 353