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 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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  38 #pragma implementation "palette.h"
  39 #endif
  40
  41 // For compilers that support precompilation, includes "wx.h".
  42 #include "wx/wxprec.h"
  43
  44 #include "wx/palette.h"
  45 #include "wx/window.h"
  46 #include "wx/app.h"
  47 #include "wx/utils.h"
  48
  49 #ifdef __VMS__
  50 #pragma message disable nosimpint
  51 #endif
  52 #include <Xm/Xm.h>
  53 #ifdef __VMS__
  54 #pragma message enable nosimpint
  55 #endif
  56 #include "wx/motif/private.h"
  57
  58 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  59 IMPLEMENT_DYNAMIC_CLASS(wxXPalette, wxObject)
  60
  61 /*
  62 * Palette
  63 *
  64 */
  65
  66 wxXPalette::wxXPalette()
  67 {
  68     m_cmap = (WXColormap) 0;
  69     m_pix_array_n = 0;
  70     m_pix_array = (unsigned long*) 0;
  71     m_display = (WXDisplay*) 0;
  72     m_destroyable = false;
  73 }
  74
  75 wxPaletteRefData::wxPaletteRefData()
  76 {
  77 }
  78
  79 wxPaletteRefData::~wxPaletteRefData()
  80 {
  81     Display *display = (Display*) NULL;
  82
  83     wxList::compatibility_iterator node, next;
  84
  85     for (node = m_palettes.GetFirst(); node; node = next) {
  86         wxXPalette *c = (wxXPalette *)node->GetData();
  87         unsigned long *pix_array = c->m_pix_array;
  88         Colormap cmap = (Colormap) c->m_cmap;
  89         bool destroyable = c->m_destroyable;
  90         int pix_array_n = c->m_pix_array_n;
  91         display = (Display*) c->m_display;
  92
  93         if (pix_array_n > 0)
  94         {
  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             delete [] pix_array;
 104         }
 105
 106         if (destroyable)
 107             XFreeColormap(display, cmap);
 108
 109         next = node->GetNext();
 110         m_palettes.Erase(node);
 111         delete c;
 112     }
 113 }
 114
 115 wxPalette::wxPalette()
 116 {
 117 }
 118
 119 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 120 {
 121     Create(n, red, green, blue);
 122 }
 123
 124 wxPalette::~wxPalette()
 125 {
 126 }
 127
 128 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 129 {
 130     UnRef();
 131
 132     if (!n) {
 133         return false;
 134     }
 135
 136     m_refData = new wxPaletteRefData;
 137
 138     XColor xcol;
 139     Display* display = (Display*) wxGetDisplay();
 140
 141     unsigned long *pix_array;
 142     Colormap cmap;
 143     int pix_array_n;
 144
 145     cmap = (Colormap) wxTheApp->GetMainColormap(display);
 146
 147     pix_array = new unsigned long[n];
 148     if (!pix_array)
 149         return false;
 150
 151     pix_array_n = n;
 152     xcol.flags = DoRed | DoGreen | DoBlue;
 153     for(int i = 0; i < n; i++) {
 154         xcol.red = (unsigned short)red[i] << 8;
 155         xcol.green = (unsigned short)green[i] << 8;
 156         xcol.blue = (unsigned short)blue[i] << 8;
 157         pix_array[i] = (XAllocColor(display, cmap, &xcol) == 0) ? 0 : xcol.pixel;
 158     }
 159
 160     wxXPalette *c = new wxXPalette;
 161
 162     c->m_pix_array_n = pix_array_n;
 163     c->m_pix_array = pix_array;
 164     c->m_cmap = (WXColormap) cmap;
 165     c->m_display = (WXDisplay*) display;
 166     c->m_destroyable = false;
 167     M_PALETTEDATA->m_palettes.Append(c);
 168
 169     return true;
 170 }
 171
 172 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
 173 {
 174     if ( !m_refData )
 175         return false;
 176
 177     // TODO
 178     return false;
 179 }
 180
 181 bool wxPalette::GetRGB(int index, unsigned char *WXUNUSED(red), unsigned char *WXUNUSED(green), unsigned char *WXUNUSED(blue)) const
 182 {
 183     if ( !m_refData )
 184         return false;
 185
 186     if (index < 0 || index > 255)
 187         return false;
 188
 189     // TODO
 190     return false;
 191 }
 192
 193 WXColormap wxPalette::GetXColormap(WXDisplay* display) const
 194 {
 195     if (!M_PALETTEDATA || (M_PALETTEDATA->m_palettes.GetCount() == 0))
 196         return wxTheApp->GetMainColormap(display);
 197
 198     wxList::compatibility_iterator node = M_PALETTEDATA->m_palettes.GetFirst();
 199     if (!display && node)
 200     {
 201         wxXPalette* p = (wxXPalette*) node->GetData();
 202         return p->m_cmap;
 203     }
 204     while (node)
 205     {
 206         wxXPalette* p = (wxXPalette*) node->GetData();
 207         if (p->m_display == display)
 208             return p->m_cmap;
 209
 210         node = node->GetNext();
 211     }
 212
 213     /* Make a new one: */
 214     wxXPalette *c = new wxXPalette;
 215     wxXPalette *first =
 216         (wxXPalette *)M_PALETTEDATA->m_palettes.GetFirst()->GetData();
 217     XColor xcol;
 218     int pix_array_n = first->m_pix_array_n;
 219
 220     c->m_pix_array_n = pix_array_n;
 221     c->m_pix_array = new unsigned long[pix_array_n];
 222     c->m_display = display;
 223     c->m_cmap = wxTheApp->GetMainColormap(display);
 224     c->m_destroyable = false;
 225
 226     xcol.flags = DoRed | DoGreen | DoBlue;
 227     int i;
 228     for (i = 0; i < pix_array_n; i++)
 229     {
 230         xcol.pixel = first->m_pix_array[i];
 231         XQueryColor((Display*) first->m_display,
 232                     (Colormap) first->m_cmap, &xcol);
 233         c->m_pix_array[i] =
 234             (XAllocColor((Display*) display, (Colormap) c->m_cmap, &xcol) == 0)
 235             ? 0 : xcol.pixel;
 236     }
 237
 238     //    wxPalette* nonConstThis = (wxPalette*) this;
 239
 240     M_PALETTEDATA->m_palettes.Append(c);
 241
 242     return c->m_cmap;
 243 }
 244
 245 bool wxPalette::TransferBitmap(void *data, int depth, int size)
 246 {
 247     switch(depth) {
 248     case 8:
 249         {
 250             unsigned char *uptr = (unsigned char *)data;
 251             int pix_array_n;
 252             unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 253             while(size-- > 0)
 254             {
 255                 if((int)*uptr < pix_array_n)
 256                     *uptr = (unsigned char)pix_array[*uptr];
 257                 uptr++;
 258             }
 259
 260             return true;
 261         }
 262     default:
 263         return false;
 264     }
 265 }
 266
 267 bool wxPalette::TransferBitmap8(unsigned char *data, unsigned long sz,
 268                                 void *dest, unsigned int bpp)
 269 {
 270     int pix_array_n;
 271     unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 272     switch(bpp) {
 273     case 8: {
 274         unsigned char *dptr = (unsigned char *)dest;
 275         while(sz-- > 0) {
 276             if((int)*data < pix_array_n)
 277                 *dptr = (unsigned char)pix_array[*data];
 278             data++;
 279             dptr++;
 280         }
 281         break;
 282             }
 283     case 16: {
 284         unsigned short *dptr = (unsigned short *)dest;
 285         while(sz-- > 0) {
 286             if((int)*data < pix_array_n)
 287                 *dptr = (unsigned short)pix_array[*data];
 288             data++;
 289             dptr++;
 290         }
 291         break;
 292              }
 293     case 24: {
 294         struct rgb24 { unsigned char r, g, b; } *dptr = (struct rgb24 *)dest;
 295         while(sz-- > 0) {
 296             if((int)*data < pix_array_n) {
 297                 dptr->r = pix_array[*data] & 0xFF;
 298                 dptr->g = (pix_array[*data] >> 8) & 0xFF;
 299                 dptr->b = (pix_array[*data] >> 16) & 0xFF;
 300             }
 301             data++;
 302             dptr++;
 303         }
 304         break;
 305              }
 306     case 32: {
 307         unsigned long *dptr = (unsigned long *)dest;
 308         while(sz-- > 0) {
 309             if((int)*data < pix_array_n)
 310                 *dptr = pix_array[*data];
 311             data++;
 312             dptr++;
 313         }
 314         break;
 315              }
 316     default:
 317         return false;
 318     }
 319     return true;
 320 }
 321
 322 unsigned long *wxPalette::GetXPixArray(WXDisplay *display, int *n)
 323 {
 324     if (!M_PALETTEDATA)
 325         return (unsigned long*) 0;
 326     wxList::compatibility_iterator node;
 327
 328     for (node = M_PALETTEDATA->m_palettes.GetFirst(); node;
 329          node = node->GetNext())
 330     {
 331         wxXPalette *c = (wxXPalette *)node->GetData();
 332         if (c->m_display == display)
 333         {
 334             if (n)
 335                 *n = c->m_pix_array_n;
 336             return c->m_pix_array;
 337         }
 338     }
 339
 340     /* Not found; call GetXColormap, which will create it, then this again */
 341     if (GetXColormap(display))
 342         return GetXPixArray(display, n);
 343     else
 344         return (unsigned long*) 0;
 345 }
 346
 347 void wxPalette::PutXColormap(WXDisplay* display, WXColormap cm, bool dp)
 348 {
 349     UnRef();
 350
 351     m_refData = new wxPaletteRefData;
 352
 353     wxXPalette *c = new wxXPalette;
 354
 355     c->m_pix_array_n = 0;
 356     c->m_pix_array = (unsigned long*) NULL;
 357     c->m_display = display;
 358     c->m_cmap = cm;
 359     c->m_destroyable = dp;
 360
 361     M_PALETTEDATA->m_palettes.Append(c);
 362 }
 363