src/x11/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 #ifdef __VMS__
  47 #pragma message disable nosimpint
  48 #endif
  49
  50 #ifdef __VMS__
  51 #pragma message enable nosimpint
  52 #endif
  53 #include "wx/x11/private.h"
  54
  55 IMPLEMENT_DYNAMIC_CLASS(wxPalette, wxGDIObject)
  56 IMPLEMENT_DYNAMIC_CLASS(wxXPalette, wxObject)
  57
  58 /*
  59 * Palette
  60 *
  61 */
  62
  63 wxXPalette::wxXPalette()
  64 {
  65     m_cmap = (WXColormap) 0;
  66     m_pix_array_n = 0;
  67     m_pix_array = (unsigned long*) 0;
  68     m_display = (WXDisplay*) 0;
  69     m_destroyable = FALSE;
  70 }
  71
  72 wxPaletteRefData::wxPaletteRefData()
  73 {
  74 }
  75
  76 wxPaletteRefData::~wxPaletteRefData()
  77 {
  78     Display *display = (Display*) NULL;
  79
  80     wxNode *node, *next;
  81
  82     for (node = m_palettes.First(); node; node = next) {
  83         wxXPalette *c = (wxXPalette *)node->Data();
  84         unsigned long *pix_array = c->m_pix_array;
  85         Colormap cmap = (Colormap) c->m_cmap;
  86         bool destroyable = c->m_destroyable;
  87         int pix_array_n = c->m_pix_array_n;
  88         display = (Display*) c->m_display;
  89
  90         if (pix_array_n > 0)
  91         {
  92             //      XFreeColors(display, cmap, pix_array, pix_array_n, 0);
  93             // Be careful not to free '0' pixels...
  94             int i, j;
  95             for(i=j=0; i<pix_array_n; i=j) {
  96                 while(j<pix_array_n && pix_array[j]!=0) j++;
  97                 if(j > i) XFreeColors(display, cmap, &pix_array[i], j-i, 0);
  98                 while(j<pix_array_n && pix_array[j]==0) j++;
  99             }
 100             delete [] pix_array;
 101         }
 102
 103         if (destroyable)
 104             XFreeColormap(display, cmap);
 105
 106         next = node->Next();
 107         m_palettes.DeleteNode(node);
 108         delete c;
 109     }
 110 }
 111
 112 wxPalette::wxPalette()
 113 {
 114 }
 115
 116 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 117 {
 118     Create(n, red, green, blue);
 119 }
 120
 121 wxPalette::~wxPalette()
 122 {
 123 }
 124
 125 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 126 {
 127     UnRef();
 128
 129     if (!n) {
 130         return FALSE;
 131     }
 132
 133     m_refData = new wxPaletteRefData;
 134
 135     XColor xcol;
 136     Display* display = (Display*) wxGetDisplay();
 137
 138     unsigned long *pix_array;
 139     Colormap cmap;
 140     int pix_array_n;
 141
 142     cmap = (Colormap) wxTheApp->GetMainColormap(display);
 143
 144     pix_array = new unsigned long[n];
 145     if (!pix_array)
 146         return FALSE;
 147
 148     pix_array_n = n;
 149     xcol.flags = DoRed | DoGreen | DoBlue;
 150     for(int i = 0; i < n; i++) {
 151         xcol.red = (unsigned short)red[i] << 8;
 152         xcol.green = (unsigned short)green[i] << 8;
 153         xcol.blue = (unsigned short)blue[i] << 8;
 154         pix_array[i] = (XAllocColor(display, cmap, &xcol) == 0) ? 0 : xcol.pixel;
 155     }
 156
 157     wxXPalette *c = new wxXPalette;
 158
 159     c->m_pix_array_n = pix_array_n;
 160     c->m_pix_array = pix_array;
 161     c->m_cmap = (WXColormap) cmap;
 162     c->m_display = (WXDisplay*) display;
 163     c->m_destroyable = FALSE;
 164     M_PALETTEDATA->m_palettes.Append(c);
 165
 166     return TRUE;
 167 }
 168
 169 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
 170 {
 171     if ( !m_refData )
 172         return FALSE;
 173
 174     // TODO
 175     return FALSE;
 176 }
 177
 178 bool wxPalette::GetRGB(int index, unsigned char *WXUNUSED(red), unsigned char *WXUNUSED(green), unsigned char *WXUNUSED(blue)) const
 179 {
 180     if ( !m_refData )
 181         return FALSE;
 182
 183     if (index < 0 || index > 255)
 184         return FALSE;
 185
 186     // TODO
 187     return FALSE;
 188 }
 189
 190 WXColormap wxPalette::GetXColormap(WXDisplay* display) const
 191 {
 192     if (!M_PALETTEDATA || (M_PALETTEDATA->m_palettes.Number() == 0))
 193         return wxTheApp->GetMainColormap(display);
 194
 195     wxNode* node = M_PALETTEDATA->m_palettes.First();
 196     if (!display && node)
 197     {
 198         wxXPalette* p = (wxXPalette*) node->Data();
 199         return p->m_cmap;
 200     }
 201     while (node)
 202     {
 203         wxXPalette* p = (wxXPalette*) node->Data();
 204         if (p->m_display == display)
 205             return p->m_cmap;
 206
 207         node = node->Next();
 208     }
 209
 210     /* Make a new one: */
 211     wxXPalette *c = new wxXPalette;
 212     wxXPalette *first = (wxXPalette *)M_PALETTEDATA->m_palettes.First()->Data();
 213     XColor xcol;
 214     int pix_array_n = first->m_pix_array_n;
 215
 216     c->m_pix_array_n = pix_array_n;
 217     c->m_pix_array = new unsigned long[pix_array_n];
 218     c->m_display = display;
 219     c->m_cmap = wxTheApp->GetMainColormap(display);
 220     c->m_destroyable = FALSE;
 221
 222     xcol.flags = DoRed | DoGreen | DoBlue;
 223     int i;
 224     for (i = 0; i < pix_array_n; i++)
 225     {
 226         xcol.pixel = first->m_pix_array[i];
 227         XQueryColor((Display*) first->m_display, (Colormap) first->m_cmap, &xcol);
 228         c->m_pix_array[i] =
 229             (XAllocColor((Display*) display, (Colormap) c->m_cmap, &xcol) == 0) ? 0 : xcol.pixel;
 230     }
 231
 232     //    wxPalette* nonConstThis = (wxPalette*) this;
 233
 234     M_PALETTEDATA->m_palettes.Append(c);
 235
 236     return c->m_cmap;
 237 }
 238
 239 bool wxPalette::TransferBitmap(void *data, int depth, int size)
 240 {
 241     switch(depth) {
 242     case 8:
 243         {
 244             unsigned char *uptr = (unsigned char *)data;
 245             int pix_array_n;
 246             unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 247             while(size-- > 0)
 248             {
 249                 if((int)*uptr < pix_array_n)
 250                     *uptr = (unsigned char)pix_array[*uptr];
 251                 uptr++;
 252             }
 253
 254             return TRUE;
 255         }
 256     default:
 257         return FALSE;
 258     }
 259 }
 260
 261 bool wxPalette::TransferBitmap8(unsigned char *data, unsigned long sz,
 262                                 void *dest, unsigned int bpp)
 263 {
 264     int pix_array_n;
 265     unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 266     switch(bpp) {
 267     case 8: {
 268         unsigned char *dptr = (unsigned char *)dest;
 269         while(sz-- > 0) {
 270             if((int)*data < pix_array_n)
 271                 *dptr = (unsigned char)pix_array[*data];
 272             data++;
 273             dptr++;
 274         }
 275         break;
 276             }
 277     case 16: {
 278         unsigned short *dptr = (unsigned short *)dest;
 279         while(sz-- > 0) {
 280             if((int)*data < pix_array_n)
 281                 *dptr = (unsigned short)pix_array[*data];
 282             data++;
 283             dptr++;
 284         }
 285         break;
 286              }
 287     case 24: {
 288         struct rgb24 { unsigned char r, g, b; } *dptr = (struct rgb24 *)dest;
 289         while(sz-- > 0) {
 290             if((int)*data < pix_array_n) {
 291                 dptr->r = pix_array[*data] & 0xFF;
 292                 dptr->g = (pix_array[*data] >> 8) & 0xFF;
 293                 dptr->b = (pix_array[*data] >> 16) & 0xFF;
 294             }
 295             data++;
 296             dptr++;
 297         }
 298         break;
 299              }
 300     case 32: {
 301         unsigned long *dptr = (unsigned long *)dest;
 302         while(sz-- > 0) {
 303             if((int)*data < pix_array_n)
 304                 *dptr = pix_array[*data];
 305             data++;
 306             dptr++;
 307         }
 308         break;
 309              }
 310     default:
 311         return FALSE;
 312     }
 313     return TRUE;
 314 }
 315
 316 unsigned long *wxPalette::GetXPixArray(WXDisplay *display, int *n)
 317 {
 318     if (!M_PALETTEDATA)
 319         return (unsigned long*) 0;
 320     wxNode *node;
 321
 322     for (node = M_PALETTEDATA->m_palettes.First(); node; node = node->Next())
 323     {
 324         wxXPalette *c = (wxXPalette *)node->Data();
 325         if (c->m_display == display)
 326         {
 327             if (n)
 328                 *n = c->m_pix_array_n;
 329             return c->m_pix_array;
 330         }
 331     }
 332
 333     /* Not found; call GetXColormap, which will create it, then this again */
 334     if (GetXColormap(display))
 335         return GetXPixArray(display, n);
 336     else
 337         return (unsigned long*) 0;
 338 }
 339
 340 void wxPalette::PutXColormap(WXDisplay* display, WXColormap cm, bool dp)
 341 {
 342     UnRef();
 343
 344     m_refData = new wxPaletteRefData;
 345
 346     wxXPalette *c = new wxXPalette;
 347
 348     c->m_pix_array_n = 0;
 349     c->m_pix_array = (unsigned long*) NULL;
 350     c->m_display = display;
 351     c->m_cmap = cm;
 352     c->m_destroyable = dp;
 353
 354     M_PALETTEDATA->m_palettes.Append(c);
 355 }
 356