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 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 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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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     wxList::compatibility_iterator node, next;
  81
  82     for (node = m_palettes.GetFirst(); node; node = next) {
  83         wxXPalette *c = (wxXPalette *)node->GetData();
  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 #if !wxUSE_NANOX
  93             //      XFreeColors(display, cmap, pix_array, pix_array_n, 0);
  94             // Be careful not to free '0' pixels...
  95             int i, j;
  96             for(i=j=0; i<pix_array_n; i=j) {
  97                 while(j<pix_array_n && pix_array[j]!=0) j++;
  98                 if(j > i) XFreeColors(display, cmap, &pix_array[i], j-i, 0);
  99                 while(j<pix_array_n && pix_array[j]==0) j++;
 100             }
 101 #endif
 102             delete [] pix_array;
 103         }
 104
 105         if (destroyable)
 106             XFreeColormap(display, cmap);
 107
 108         next = node->GetNext();
 109         m_palettes.Erase(node);
 110         delete c;
 111     }
 112 }
 113
 114 wxPalette::wxPalette()
 115 {
 116 }
 117
 118 wxPalette::wxPalette(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 119 {
 120     Create(n, red, green, blue);
 121 }
 122
 123 wxPalette::~wxPalette()
 124 {
 125 }
 126
 127 bool wxPalette::Create(int n, const unsigned char *red, const unsigned char *green, const unsigned char *blue)
 128 {
 129     UnRef();
 130
 131     if (!n) {
 132         return FALSE;
 133     }
 134
 135     m_refData = new wxPaletteRefData;
 136
 137     XColor xcol;
 138     Display* display = (Display*) wxGetDisplay();
 139
 140     unsigned long *pix_array;
 141     Colormap cmap;
 142     int pix_array_n;
 143
 144     cmap = (Colormap) wxTheApp->GetMainColormap(display);
 145
 146     pix_array = new unsigned long[n];
 147     if (!pix_array)
 148         return FALSE;
 149
 150     pix_array_n = n;
 151     xcol.flags = DoRed | DoGreen | DoBlue;
 152     for(int i = 0; i < n; i++) {
 153         xcol.red = (unsigned short)red[i] << 8;
 154         xcol.green = (unsigned short)green[i] << 8;
 155         xcol.blue = (unsigned short)blue[i] << 8;
 156         pix_array[i] = (XAllocColor(display, cmap, &xcol) == 0) ? 0 : xcol.pixel;
 157     }
 158
 159     wxXPalette *c = new wxXPalette;
 160
 161     c->m_pix_array_n = pix_array_n;
 162     c->m_pix_array = pix_array;
 163     c->m_cmap = (WXColormap) cmap;
 164     c->m_display = (WXDisplay*) display;
 165     c->m_destroyable = FALSE;
 166     M_PALETTEDATA->m_palettes.Append(c);
 167
 168     return TRUE;
 169 }
 170
 171 int wxPalette::GetPixel(const unsigned char red, const unsigned char green, const unsigned char blue) const
 172 {
 173     if ( !m_refData )
 174         return FALSE;
 175
 176     // TODO
 177     return FALSE;
 178 }
 179
 180 bool wxPalette::GetRGB(int index, unsigned char *WXUNUSED(red), unsigned char *WXUNUSED(green), unsigned char *WXUNUSED(blue)) const
 181 {
 182     if ( !m_refData )
 183         return FALSE;
 184
 185     if (index < 0 || index > 255)
 186         return FALSE;
 187
 188     // TODO
 189     return FALSE;
 190 }
 191
 192 WXColormap wxPalette::GetXColormap(WXDisplay* display) const
 193 {
 194     if (!M_PALETTEDATA || (M_PALETTEDATA->m_palettes.GetCount() == 0))
 195         return wxTheApp->GetMainColormap(display);
 196
 197     wxList::compatibility_iterator node = M_PALETTEDATA->m_palettes.GetFirst();
 198     if (!display && node)
 199     {
 200         wxXPalette* p = (wxXPalette*) node->GetData();
 201         return p->m_cmap;
 202     }
 203     while (node)
 204     {
 205         wxXPalette* p = (wxXPalette*) node->GetData();
 206         if (p->m_display == display)
 207             return p->m_cmap;
 208
 209         node = node->GetNext();
 210     }
 211
 212     /* Make a new one: */
 213     wxXPalette *c = new wxXPalette;
 214     wxXPalette *first = (wxXPalette *)M_PALETTEDATA->m_palettes.GetFirst()->GetData();
 215     XColor xcol;
 216     int pix_array_n = first->m_pix_array_n;
 217
 218     c->m_pix_array_n = pix_array_n;
 219     c->m_pix_array = new unsigned long[pix_array_n];
 220     c->m_display = display;
 221     c->m_cmap = wxTheApp->GetMainColormap(display);
 222     c->m_destroyable = FALSE;
 223
 224     xcol.flags = DoRed | DoGreen | DoBlue;
 225     int i;
 226     for (i = 0; i < pix_array_n; i++)
 227     {
 228         xcol.pixel = first->m_pix_array[i];
 229         XQueryColor((Display*) first->m_display, (Colormap) first->m_cmap, &xcol);
 230         c->m_pix_array[i] =
 231             (XAllocColor((Display*) display, (Colormap) c->m_cmap, &xcol) == 0) ? 0 : xcol.pixel;
 232     }
 233
 234     //    wxPalette* nonConstThis = (wxPalette*) this;
 235
 236     M_PALETTEDATA->m_palettes.Append(c);
 237
 238     return c->m_cmap;
 239 }
 240
 241 bool wxPalette::TransferBitmap(void *data, int depth, int size)
 242 {
 243     switch(depth) {
 244     case 8:
 245         {
 246             unsigned char *uptr = (unsigned char *)data;
 247             int pix_array_n;
 248             unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 249             while(size-- > 0)
 250             {
 251                 if((int)*uptr < pix_array_n)
 252                     *uptr = (unsigned char)pix_array[*uptr];
 253                 uptr++;
 254             }
 255
 256             return TRUE;
 257         }
 258     default:
 259         return FALSE;
 260     }
 261 }
 262
 263 bool wxPalette::TransferBitmap8(unsigned char *data, unsigned long sz,
 264                                 void *dest, unsigned int bpp)
 265 {
 266     int pix_array_n;
 267     unsigned long *pix_array = GetXPixArray((Display*) wxGetDisplay(), &pix_array_n);
 268     switch(bpp) {
 269     case 8: {
 270         unsigned char *dptr = (unsigned char *)dest;
 271         while(sz-- > 0) {
 272             if((int)*data < pix_array_n)
 273                 *dptr = (unsigned char)pix_array[*data];
 274             data++;
 275             dptr++;
 276         }
 277         break;
 278             }
 279     case 16: {
 280         unsigned short *dptr = (unsigned short *)dest;
 281         while(sz-- > 0) {
 282             if((int)*data < pix_array_n)
 283                 *dptr = (unsigned short)pix_array[*data];
 284             data++;
 285             dptr++;
 286         }
 287         break;
 288              }
 289     case 24: {
 290         struct rgb24 { unsigned char r, g, b; } *dptr = (struct rgb24 *)dest;
 291         while(sz-- > 0) {
 292             if((int)*data < pix_array_n) {
 293                 dptr->r = pix_array[*data] & 0xFF;
 294                 dptr->g = (pix_array[*data] >> 8) & 0xFF;
 295                 dptr->b = (pix_array[*data] >> 16) & 0xFF;
 296             }
 297             data++;
 298             dptr++;
 299         }
 300         break;
 301              }
 302     case 32: {
 303         unsigned long *dptr = (unsigned long *)dest;
 304         while(sz-- > 0) {
 305             if((int)*data < pix_array_n)
 306                 *dptr = pix_array[*data];
 307             data++;
 308             dptr++;
 309         }
 310         break;
 311              }
 312     default:
 313         return FALSE;
 314     }
 315     return TRUE;
 316 }
 317
 318 unsigned long *wxPalette::GetXPixArray(WXDisplay *display, int *n)
 319 {
 320     if (!M_PALETTEDATA)
 321         return (unsigned long*) 0;
 322     wxList::compatibility_iterator node;
 323
 324     for (node = M_PALETTEDATA->m_palettes.GetFirst(); node; node = node->GetNext())
 325     {
 326         wxXPalette *c = (wxXPalette *)node->GetData();
 327         if (c->m_display == display)
 328         {
 329             if (n)
 330                 *n = c->m_pix_array_n;
 331             return c->m_pix_array;
 332         }
 333     }
 334
 335     /* Not found; call GetXColormap, which will create it, then this again */
 336     if (GetXColormap(display))
 337         return GetXPixArray(display, n);
 338     else
 339         return (unsigned long*) 0;
 340 }
 341
 342 void wxPalette::PutXColormap(WXDisplay* display, WXColormap cm, bool dp)
 343 {
 344     UnRef();
 345
 346     m_refData = new wxPaletteRefData;
 347
 348     wxXPalette *c = new wxXPalette;
 349
 350     c->m_pix_array_n = 0;
 351     c->m_pix_array = (unsigned long*) NULL;
 352     c->m_display = display;
 353     c->m_cmap = cm;
 354     c->m_destroyable = dp;
 355
 356     M_PALETTEDATA->m_palettes.Append(c);
 357 }
 358