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 = (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 int wxPalette::GetPixel(unsigned char red, unsigned char green, unsigned char 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 = (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, (Colormap) first->m_cmap, &xcol);
 232         c->m_pix_array[i] =
 233             (XAllocColor((Display*) display, (Colormap) c->m_cmap, &xcol) == 0) ? 0 : xcol.pixel;
 234     }
 235
 236     //    wxPalette* nonConstThis = (wxPalette*) this;
 237
 238     M_PALETTEDATA->m_palettes.Append(c);
 239
 240     return c->m_cmap;
 241 }
 242
 243 bool wxPalette::TransferBitmap(void *data, int depth, int size)
 244 {
 245     switch(depth) {
 246     case 8:
 247         {
 248             unsigned char *uptr = (unsigned char *)data;
 249             int pix_array_n;
 250             unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 251             while(size-- > 0)
 252             {
 253                 if((int)*uptr < pix_array_n)
 254                     *uptr = (unsigned char)pix_array[*uptr];
 255                 uptr++;
 256             }
 257
 258             return true;
 259         }
 260     default:
 261         return false;
 262     }
 263 }
 264
 265 bool wxPalette::TransferBitmap8(unsigned char *data, unsigned long sz,
 266                                 void *dest, unsigned int bpp)
 267 {
 268     int pix_array_n;
 269     unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 270     switch(bpp) {
 271     case 8: {
 272         unsigned char *dptr = (unsigned char *)dest;
 273         while(sz-- > 0) {
 274             if((int)*data < pix_array_n)
 275                 *dptr = (unsigned char)pix_array[*data];
 276             data++;
 277             dptr++;
 278         }
 279         break;
 280             }
 281     case 16: {
 282         unsigned short *dptr = (unsigned short *)dest;
 283         while(sz-- > 0) {
 284             if((int)*data < pix_array_n)
 285                 *dptr = (unsigned short)pix_array[*data];
 286             data++;
 287             dptr++;
 288         }
 289         break;
 290              }
 291     case 24: {
 292         struct rgb24 { unsigned char r, g, b; } *dptr = (struct rgb24 *)dest;
 293         while(sz-- > 0) {
 294             if((int)*data < pix_array_n) {
 295                 dptr->r = pix_array[*data] & 0xFF;
 296                 dptr->g = (pix_array[*data] >> 8) & 0xFF;
 297                 dptr->b = (pix_array[*data] >> 16) & 0xFF;
 298             }
 299             data++;
 300             dptr++;
 301         }
 302         break;
 303              }
 304     case 32: {
 305         unsigned long *dptr = (unsigned long *)dest;
 306         while(sz-- > 0) {
 307             if((int)*data < pix_array_n)
 308                 *dptr = pix_array[*data];
 309             data++;
 310             dptr++;
 311         }
 312         break;
 313              }
 314     default:
 315         return false;
 316     }
 317     return true;
 318 }
 319
 320 unsigned long *wxPalette::GetXPixArray(WXDisplay *display, int *n)
 321 {
 322     if (!M_PALETTEDATA)
 323         return (unsigned long*) 0;
 324     wxList::compatibility_iterator node;
 325
 326     for (node = M_PALETTEDATA->m_palettes.GetFirst(); node; node = node->GetNext())
 327     {
 328         wxXPalette *c = (wxXPalette *)node->GetData();
 329         if (c->m_display == display)
 330         {
 331             if (n)
 332                 *n = c->m_pix_array_n;
 333             return c->m_pix_array;
 334         }
 335     }
 336
 337     /* Not found; call GetXColormap, which will create it, then this again */
 338     if (GetXColormap(display))
 339         return GetXPixArray(display, n);
 340     else
 341         return (unsigned long*) 0;
 342 }
 343
 344 void wxPalette::PutXColormap(WXDisplay* display, WXColormap cm, bool dp)
 345 {
 346     UnRef();
 347
 348     m_refData = new wxPaletteRefData;
 349
 350     wxXPalette *c = new wxXPalette;
 351
 352     c->m_pix_array_n = 0;
 353     c->m_pix_array = (unsigned long*) NULL;
 354     c->m_display = display;
 355     c->m_cmap = cm;
 356     c->m_destroyable = dp;
 357
 358     M_PALETTEDATA->m_palettes.Append(c);
 359 }