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 WXUNUSED(red),
 174                         unsigned char WXUNUSED(green),
 175                         unsigned char WXUNUSED(blue)) const
 176 {
 177     if ( !m_refData )
 178         return wxNOT_FOUND;
 179
 180     // TODO
 181     return wxNOT_FOUND;
 182 }
 183
 184 bool wxPalette::GetRGB(int index, unsigned char *WXUNUSED(red), unsigned char *WXUNUSED(green), unsigned char *WXUNUSED(blue)) const
 185 {
 186     if ( !m_refData )
 187         return false;
 188
 189     if (index < 0 || index > 255)
 190         return false;
 191
 192     // TODO
 193     return false;
 194 }
 195
 196 WXColormap wxPalette::GetXColormap(WXDisplay* display) const
 197 {
 198     if (!M_PALETTEDATA || (M_PALETTEDATA->m_palettes.GetCount() == 0))
 199         return wxTheApp->GetMainColormap(display);
 200
 201     wxList::compatibility_iterator node = M_PALETTEDATA->m_palettes.GetFirst();
 202     if (!display && node)
 203     {
 204         wxXPalette* p = (wxXPalette*) node->GetData();
 205         return p->m_cmap;
 206     }
 207     while (node)
 208     {
 209         wxXPalette* p = (wxXPalette*) node->GetData();
 210         if (p->m_display == display)
 211             return p->m_cmap;
 212
 213         node = node->GetNext();
 214     }
 215
 216     /* Make a new one: */
 217     wxXPalette *c = new wxXPalette;
 218     wxXPalette *first = (wxXPalette *)M_PALETTEDATA->m_palettes.GetFirst()->GetData();
 219     XColor xcol;
 220     int pix_array_n = first->m_pix_array_n;
 221
 222     c->m_pix_array_n = pix_array_n;
 223     c->m_pix_array = new unsigned long[pix_array_n];
 224     c->m_display = display;
 225     c->m_cmap = wxTheApp->GetMainColormap(display);
 226     c->m_destroyable = false;
 227
 228     xcol.flags = DoRed | DoGreen | DoBlue;
 229     int i;
 230     for (i = 0; i < pix_array_n; i++)
 231     {
 232         xcol.pixel = first->m_pix_array[i];
 233         XQueryColor((Display*) first->m_display, (Colormap) first->m_cmap, &xcol);
 234         c->m_pix_array[i] =
 235             (XAllocColor((Display*) display, (Colormap) c->m_cmap, &xcol) == 0) ? 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; node = node->GetNext())
 329     {
 330         wxXPalette *c = (wxXPalette *)node->GetData();
 331         if (c->m_display == display)
 332         {
 333             if (n)
 334                 *n = c->m_pix_array_n;
 335             return c->m_pix_array;
 336         }
 337     }
 338
 339     /* Not found; call GetXColormap, which will create it, then this again */
 340     if (GetXColormap(display))
 341         return GetXPixArray(display, n);
 342     else
 343         return (unsigned long*) 0;
 344 }
 345
 346 void wxPalette::PutXColormap(WXDisplay* display, WXColormap cm, bool dp)
 347 {
 348     UnRef();
 349
 350     m_refData = new wxPaletteRefData;
 351
 352     wxXPalette *c = new wxXPalette;
 353
 354     c->m_pix_array_n = 0;
 355     c->m_pix_array = (unsigned long*) NULL;
 356     c->m_display = display;
 357     c->m_cmap = cm;
 358     c->m_destroyable = dp;
 359
 360     M_PALETTEDATA->m_palettes.Append(c);
 361 }