Dogcows Code - chaz/openbox/blob - otk/imagecontrol.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef    HAVE_CONFIG_H
   4 #  include "../config.h"
   5 #endif // HAVE_CONFIG_H
   6
   7 extern "C" {
   8 #ifdef    HAVE_STDIO_H
   9 #  include <stdio.h>
  10 #endif // HAVE_STDIO_H
  11
  12 #ifdef    HAVE_CTYPE_H
  13 #  include <ctype.h>
  14 #endif // HAVE_CTYPE_H
  15
  16 #include <X11/Xlib.h>
  17 }
  18
  19 #include <algorithm>
  20
  21 #include "display.hh"
  22 #include "color.hh"
  23 #include "image.hh"
  24 #include "texture.hh"
  25
  26 namespace otk {
  27
  28 static unsigned long bsqrt(unsigned long x) {
  29   if (x <= 0) return 0;
  30   if (x == 1) return 1;
  31
  32   unsigned long r = x >> 1;
  33   unsigned long q;
  34
  35   while (1) {
  36     q = x / r;
  37     if (q >= r) return r;
  38     r = (r + q) >> 1;
  39   }
  40 }
  41
  42 BImageControl *ctrl = 0;
  43
  44 BImageControl::BImageControl(OBTimerQueueManager *timermanager,
  45                              const ScreenInfo *scrn,
  46                              bool _dither, int _cpc,
  47                              unsigned long cache_timeout,
  48                              unsigned long cmax) {
  49   if (! ctrl) ctrl = this;
  50
  51   screeninfo = scrn;
  52   setDither(_dither);
  53   setColorsPerChannel(_cpc);
  54
  55   cache_max = cmax;
  56   if (cache_timeout) {
  57     timer = new OBTimer(timermanager, (OBTimeoutHandler)timeout, this);
  58     timer->setTimeout(cache_timeout);
  59     timer->start();
  60   } else {
  61     timer = (OBTimer *) 0;
  62   }
  63
  64   colors = (XColor *) 0;
  65   ncolors = 0;
  66
  67   grad_xbuffer = grad_ybuffer = (unsigned int *) 0;
  68   grad_buffer_width = grad_buffer_height = 0;
  69
  70   sqrt_table = (unsigned long *) 0;
  71
  72   screen_depth = screeninfo->getDepth();
  73   window = screeninfo->getRootWindow();
  74   screen_number = screeninfo->getScreenNumber();
  75   colormap = screeninfo->getColormap();
  76
  77   int count;
  78   XPixmapFormatValues *pmv = XListPixmapFormats(OBDisplay::display,
  79                                                 &count);
  80   if (pmv) {
  81     bits_per_pixel = 0;
  82     for (int i = 0; i < count; i++)
  83       if (pmv[i].depth == screen_depth) {
  84         bits_per_pixel = pmv[i].bits_per_pixel;
  85         break;
  86       }
  87
  88     XFree(pmv);
  89   }
  90
  91   if (bits_per_pixel == 0) bits_per_pixel = screen_depth;
  92   if (bits_per_pixel >= 24) setDither(False);
  93
  94   red_offset = green_offset = blue_offset = 0;
  95
  96   switch (getVisual()->c_class) {
  97   case TrueColor: {
  98     int i;
  99
 100     // compute color tables
 101     unsigned long red_mask = getVisual()->red_mask,
 102       green_mask = getVisual()->green_mask,
 103       blue_mask = getVisual()->blue_mask;
 104
 105     while (! (red_mask & 1)) { red_offset++; red_mask >>= 1; }
 106     while (! (green_mask & 1)) { green_offset++; green_mask >>= 1; }
 107     while (! (blue_mask & 1)) { blue_offset++; blue_mask >>= 1; }
 108
 109     red_bits = 255 / red_mask;
 110     green_bits = 255 / green_mask;
 111     blue_bits = 255 / blue_mask;
 112
 113     for (i = 0; i < 256; i++) {
 114       red_color_table[i] = i / red_bits;
 115       green_color_table[i] = i / green_bits;
 116       blue_color_table[i] = i / blue_bits;
 117     }
 118     break;
 119   }
 120
 121   case PseudoColor:
 122   case StaticColor: {
 123     ncolors = colors_per_channel * colors_per_channel * colors_per_channel;
 124
 125     if (ncolors > (1 << screen_depth)) {
 126       colors_per_channel = (1 << screen_depth) / 3;
 127       ncolors = colors_per_channel * colors_per_channel * colors_per_channel;
 128     }
 129
 130     if (colors_per_channel < 2 || ncolors > (1 << screen_depth)) {
 131       fprintf(stderr,
 132               "BImageControl::BImageControl: invalid colormap size %d "
 133               "(%d/%d/%d) - reducing",
 134               ncolors, colors_per_channel, colors_per_channel,
 135               colors_per_channel);
 136
 137       colors_per_channel = (1 << screen_depth) / 3;
 138     }
 139
 140     colors = new XColor[ncolors];
 141     if (! colors) {
 142       fprintf(stderr, "BImageControl::BImageControl: error allocating "
 143               "colormap\n");
 144       exit(1);
 145     }
 146
 147     int i = 0, ii, p, r, g, b,
 148
 149 #ifdef ORDEREDPSEUDO
 150       bits = 256 / colors_per_channel;
 151 #else // !ORDEREDPSEUDO
 152     bits = 255 / (colors_per_channel - 1);
 153 #endif // ORDEREDPSEUDO
 154
 155     red_bits = green_bits = blue_bits = bits;
 156
 157     for (i = 0; i < 256; i++)
 158       red_color_table[i] = green_color_table[i] = blue_color_table[i] =
 159         i / bits;
 160
 161     for (r = 0, i = 0; r < colors_per_channel; r++)
 162       for (g = 0; g < colors_per_channel; g++)
 163         for (b = 0; b < colors_per_channel; b++, i++) {
 164           colors[i].red = (r * 0xffff) / (colors_per_channel - 1);
 165           colors[i].green = (g * 0xffff) / (colors_per_channel - 1);
 166           colors[i].blue = (b * 0xffff) / (colors_per_channel - 1);;
 167           colors[i].flags = DoRed|DoGreen|DoBlue;
 168         }
 169
 170     for (i = 0; i < ncolors; i++) {
 171       if (! XAllocColor(OBDisplay::display, colormap, &colors[i])) {
 172         fprintf(stderr, "couldn't alloc color %i %i %i\n",
 173                 colors[i].red, colors[i].green, colors[i].blue);
 174         colors[i].flags = 0;
 175       } else {
 176         colors[i].flags = DoRed|DoGreen|DoBlue;
 177       }
 178     }
 179
 180     XColor icolors[256];
 181     int incolors = (((1 << screen_depth) > 256) ? 256 : (1 << screen_depth));
 182
 183     for (i = 0; i < incolors; i++)
 184       icolors[i].pixel = i;
 185
 186     XQueryColors(OBDisplay::display, colormap, icolors, incolors);
 187     for (i = 0; i < ncolors; i++) {
 188       if (! colors[i].flags) {
 189         unsigned long chk = 0xffffffff, pixel, close = 0;
 190
 191         p = 2;
 192         while (p--) {
 193           for (ii = 0; ii < incolors; ii++) {
 194             r = (colors[i].red - icolors[i].red) >> 8;
 195             g = (colors[i].green - icolors[i].green) >> 8;
 196             b = (colors[i].blue - icolors[i].blue) >> 8;
 197             pixel = (r * r) + (g * g) + (b * b);
 198
 199             if (pixel < chk) {
 200               chk = pixel;
 201               close = ii;
 202             }
 203
 204             colors[i].red = icolors[close].red;
 205             colors[i].green = icolors[close].green;
 206             colors[i].blue = icolors[close].blue;
 207
 208             if (XAllocColor(OBDisplay::display, colormap,
 209                             &colors[i])) {
 210               colors[i].flags = DoRed|DoGreen|DoBlue;
 211               break;
 212             }
 213           }
 214         }
 215       }
 216     }
 217
 218     break;
 219   }
 220
 221   case GrayScale:
 222   case StaticGray: {
 223     if (getVisual()->c_class == StaticGray) {
 224       ncolors = 1 << screen_depth;
 225     } else {
 226       ncolors = colors_per_channel * colors_per_channel * colors_per_channel;
 227
 228       if (ncolors > (1 << screen_depth)) {
 229         colors_per_channel = (1 << screen_depth) / 3;
 230         ncolors =
 231           colors_per_channel * colors_per_channel * colors_per_channel;
 232       }
 233     }
 234
 235     if (colors_per_channel < 2 || ncolors > (1 << screen_depth)) {
 236       fprintf(stderr,
 237               "BImageControl::BImageControl: invalid colormap size %d "
 238               "(%d/%d/%d) - reducing",
 239               ncolors, colors_per_channel, colors_per_channel,
 240               colors_per_channel);
 241
 242       colors_per_channel = (1 << screen_depth) / 3;
 243     }
 244
 245     colors = new XColor[ncolors];
 246     if (! colors) {
 247       fprintf(stderr,
 248               "BImageControl::BImageControl: error allocating colormap\n");
 249       exit(1);
 250     }
 251
 252     int i = 0, ii, p, bits = 255 / (colors_per_channel - 1);
 253     red_bits = green_bits = blue_bits = bits;
 254
 255     for (i = 0; i < 256; i++)
 256       red_color_table[i] = green_color_table[i] = blue_color_table[i] =
 257         i / bits;
 258
 259     for (i = 0; i < ncolors; i++) {
 260       colors[i].red = (i * 0xffff) / (colors_per_channel - 1);
 261       colors[i].green = (i * 0xffff) / (colors_per_channel - 1);
 262       colors[i].blue = (i * 0xffff) / (colors_per_channel - 1);;
 263       colors[i].flags = DoRed|DoGreen|DoBlue;
 264
 265       if (! XAllocColor(OBDisplay::display, colormap,
 266                         &colors[i])) {
 267         fprintf(stderr, "couldn't alloc color %i %i %i\n",
 268                 colors[i].red, colors[i].green, colors[i].blue);
 269         colors[i].flags = 0;
 270       } else {
 271         colors[i].flags = DoRed|DoGreen|DoBlue;
 272       }
 273     }
 274
 275     XColor icolors[256];
 276     int incolors = (((1 << screen_depth) > 256) ? 256 :
 277                     (1 << screen_depth));
 278
 279     for (i = 0; i < incolors; i++)
 280       icolors[i].pixel = i;
 281
 282     XQueryColors(OBDisplay::display, colormap, icolors, incolors);
 283     for (i = 0; i < ncolors; i++) {
 284       if (! colors[i].flags) {
 285         unsigned long chk = 0xffffffff, pixel, close = 0;
 286
 287         p = 2;
 288         while (p--) {
 289           for (ii = 0; ii < incolors; ii++) {
 290             int r = (colors[i].red - icolors[i].red) >> 8;
 291             int g = (colors[i].green - icolors[i].green) >> 8;
 292             int b = (colors[i].blue - icolors[i].blue) >> 8;
 293             pixel = (r * r) + (g * g) + (b * b);
 294
 295             if (pixel < chk) {
 296               chk = pixel;
 297               close = ii;
 298             }
 299
 300             colors[i].red = icolors[close].red;
 301             colors[i].green = icolors[close].green;
 302             colors[i].blue = icolors[close].blue;
 303
 304             if (XAllocColor(OBDisplay::display, colormap,
 305                             &colors[i])) {
 306               colors[i].flags = DoRed|DoGreen|DoBlue;
 307               break;
 308             }
 309           }
 310         }
 311       }
 312     }
 313
 314     break;
 315   }
 316
 317   default:
 318     fprintf(stderr, "BImageControl::BImageControl: unsupported visual %d\n",
 319             getVisual()->c_class);
 320     exit(1);
 321   }
 322 }
 323
 324
 325 BImageControl::~BImageControl(void) {
 326   delete [] sqrt_table;
 327
 328   delete [] grad_xbuffer;
 329
 330   delete [] grad_ybuffer;
 331
 332   if (colors) {
 333     unsigned long *pixels = new unsigned long [ncolors];
 334
 335     for (int i = 0; i < ncolors; i++)
 336       *(pixels + i) = (*(colors + i)).pixel;
 337
 338     XFreeColors(OBDisplay::display, colormap, pixels, ncolors, 0);
 339
 340     delete [] colors;
 341   }
 342
 343   if (! cache.empty()) {
 344     //#ifdef DEBUG
 345     fprintf(stderr, "BImageContol::~BImageControl: pixmap cache - "
 346             "releasing %d pixmaps\n", cache.size());
 347     //#endif
 348     CacheContainer::iterator it = cache.begin();
 349     const CacheContainer::iterator end = cache.end();
 350     for (; it != end; ++it)
 351       XFreePixmap(OBDisplay::display, it->pixmap);
 352   }
 353   if (timer) {
 354     timer->stop();
 355     delete timer;
 356   }
 357 }
 358
 359
 360 Pixmap BImageControl::searchCache(const unsigned int width,
 361                                   const unsigned int height,
 362                                   const unsigned long texture,
 363                                   const BColor &c1, const BColor &c2) {
 364   if (cache.empty())
 365     return None;
 366
 367   CacheContainer::iterator it = cache.begin();
 368   const CacheContainer::iterator end = cache.end();
 369   for (; it != end; ++it) {
 370     CachedImage& tmp = *it;
 371     if (tmp.width == width && tmp.height == height &&
 372         tmp.texture == texture && tmp.pixel1 == c1.pixel())
 373       if (texture & BTexture::Gradient) {
 374         if (tmp.pixel2 == c2.pixel()) {
 375           tmp.count++;
 376           return tmp.pixmap;
 377         }
 378       } else {
 379         tmp.count++;
 380         return tmp.pixmap;
 381       }
 382   }
 383   return None;
 384 }
 385
 386
 387 Pixmap BImageControl::renderImage(unsigned int width, unsigned int height,
 388                                   const BTexture &texture) {
 389   if (texture.texture() & BTexture::Parent_Relative) return ParentRelative;
 390
 391   Pixmap pixmap = searchCache(width, height, texture.texture(),
 392                               texture.color(), texture.colorTo());
 393   if (pixmap) return pixmap;
 394
 395   BImage image(this, width, height);
 396   pixmap = image.render(texture);
 397
 398   if (! pixmap)
 399     return None;
 400
 401   CachedImage tmp;
 402
 403   tmp.pixmap = pixmap;
 404   tmp.width = width;
 405   tmp.height = height;
 406   tmp.count = 1;
 407   tmp.texture = texture.texture();
 408   tmp.pixel1 = texture.color().pixel();
 409
 410   if (texture.texture() & BTexture::Gradient)
 411     tmp.pixel2 = texture.colorTo().pixel();
 412   else
 413     tmp.pixel2 = 0l;
 414
 415   cache.push_back(tmp);
 416
 417   if (cache.size() > cache_max) {
 418 #ifdef    DEBUG
 419     fprintf(stderr, "BImageControl::renderImage: cache is large, "
 420       "forcing cleanout\n");
 421 #endif // DEBUG
 422
 423     timeout(this);
 424   }
 425
 426   return pixmap;
 427 }
 428
 429
 430 void BImageControl::removeImage(Pixmap pixmap) {
 431   if (! pixmap)
 432     return;
 433
 434   CacheContainer::iterator it = cache.begin();
 435   const CacheContainer::iterator end = cache.end();
 436   for (; it != end; ++it) {
 437     CachedImage &tmp = *it;
 438     if (tmp.pixmap == pixmap && tmp.count > 0)
 439       tmp.count--;
 440   }
 441
 442   if (! timer)
 443     timeout(this);
 444 }
 445
 446
 447 void BImageControl::getColorTables(unsigned char **rmt, unsigned char **gmt,
 448                                    unsigned char **bmt,
 449                                    int *roff, int *goff, int *boff,
 450                                    int *rbit, int *gbit, int *bbit) {
 451   if (rmt) *rmt = red_color_table;
 452   if (gmt) *gmt = green_color_table;
 453   if (bmt) *bmt = blue_color_table;
 454
 455   if (roff) *roff = red_offset;
 456   if (goff) *goff = green_offset;
 457   if (boff) *boff = blue_offset;
 458
 459   if (rbit) *rbit = red_bits;
 460   if (gbit) *gbit = green_bits;
 461   if (bbit) *bbit = blue_bits;
 462 }
 463
 464
 465 void BImageControl::getXColorTable(XColor **c, int *n) {
 466   if (c) *c = colors;
 467   if (n) *n = ncolors;
 468 }
 469
 470
 471 void BImageControl::getGradientBuffers(unsigned int w,
 472                                        unsigned int h,
 473                                        unsigned int **xbuf,
 474                                        unsigned int **ybuf)
 475 {
 476   if (w > grad_buffer_width) {
 477     if (grad_xbuffer)
 478       delete [] grad_xbuffer;
 479
 480     grad_buffer_width = w;
 481
 482     grad_xbuffer = new unsigned int[grad_buffer_width * 3];
 483   }
 484
 485   if (h > grad_buffer_height) {
 486     if (grad_ybuffer)
 487       delete [] grad_ybuffer;
 488
 489     grad_buffer_height = h;
 490
 491     grad_ybuffer = new unsigned int[grad_buffer_height * 3];
 492   }
 493
 494   *xbuf = grad_xbuffer;
 495   *ybuf = grad_ybuffer;
 496 }
 497
 498
 499 void BImageControl::installRootColormap(void) {
 500   int ncmap = 0;
 501   Colormap *cmaps =
 502     XListInstalledColormaps(OBDisplay::display, window, &ncmap);
 503
 504   if (cmaps) {
 505     bool install = True;
 506     for (int i = 0; i < ncmap; i++)
 507       if (*(cmaps + i) == colormap)
 508         install = False;
 509
 510     if (install)
 511       XInstallColormap(OBDisplay::display, colormap);
 512
 513     XFree(cmaps);
 514   }
 515 }
 516
 517
 518 void BImageControl::setColorsPerChannel(int cpc) {
 519   if (cpc < 2) cpc = 2;
 520   if (cpc > 6) cpc = 6;
 521
 522   colors_per_channel = cpc;
 523 }
 524
 525
 526 unsigned long BImageControl::getSqrt(unsigned int x) {
 527   if (! sqrt_table) {
 528     // build sqrt table for use with elliptic gradient
 529
 530     sqrt_table = new unsigned long[(256 * 256 * 2) + 1];
 531
 532     for (int i = 0; i < (256 * 256 * 2); i++)
 533       *(sqrt_table + i) = bsqrt(i);
 534   }
 535
 536   return (*(sqrt_table + x));
 537 }
 538
 539
 540 struct ZeroRefCheck {
 541   inline bool operator()(const BImageControl::CachedImage &image) const {
 542     return (image.count == 0);
 543   }
 544 };
 545
 546 struct CacheCleaner {
 547   ZeroRefCheck ref_check;
 548   CacheCleaner() {}
 549   inline void operator()(const BImageControl::CachedImage& image) const {
 550     if (ref_check(image))
 551       XFreePixmap(OBDisplay::display, image.pixmap);
 552   }
 553 };
 554
 555
 556 void BImageControl::timeout(BImageControl *t) {
 557   CacheCleaner cleaner;
 558   std::for_each(t->cache.begin(), t->cache.end(), cleaner);
 559   t->cache.remove_if(cleaner.ref_check);
 560 }
 561
 562 }