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

   1 // -*- mode: C++; indent-tabs-mode: nil; -*-
   2 // ImageControl.cc for Blackbox - an X11 Window manager
   3 // Copyright (c) 2001 - 2002 Sean 'Shaleh' Perry <shaleh@debian.org>
   4 // Copyright (c) 1997 - 2000 Brad Hughes (bhughes@tcac.net)
   5 //
   6 // Permission is hereby granted, free of charge, to any person obtaining a
   7 // copy of this software and associated documentation files (the "Software"),
   8 // to deal in the Software without restriction, including without limitation
   9 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10 // and/or sell copies of the Software, and to permit persons to whom the
  11 // Software is furnished to do so, subject to the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be included in
  14 // all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22 // DEALINGS IN THE SOFTWARE.
  23
  24 #ifdef    HAVE_CONFIG_H
  25 #  include "../config.h"
  26 #endif // HAVE_CONFIG_H
  27
  28 extern "C" {
  29 #ifdef    HAVE_STDIO_H
  30 #  include <stdio.h>
  31 #endif // HAVE_STDIO_H
  32
  33 #ifdef    HAVE_CTYPE_H
  34 #  include <ctype.h>
  35 #endif // HAVE_CTYPE_H
  36
  37 #include <X11/Xlib.h>
  38 }
  39
  40 #include <algorithm>
  41
  42 #include "blackbox.hh"
  43 #include "basedisplay.hh"
  44 #include "color.hh"
  45 #include "image.hh"
  46 #include "texture.hh"
  47
  48 static unsigned long bsqrt(unsigned long x) {
  49   if (x <= 0) return 0;
  50   if (x == 1) return 1;
  51
  52   unsigned long r = x >> 1;
  53   unsigned long q;
  54
  55   while (1) {
  56     q = x / r;
  57     if (q >= r) return r;
  58     r = (r + q) >> 1;
  59   }
  60 }
  61
  62 BImageControl *ctrl = 0;
  63
  64 BImageControl::BImageControl(BaseDisplay *dpy, const ScreenInfo *scrn,
  65                              bool _dither, int _cpc,
  66                              unsigned long cache_timeout,
  67                              unsigned long cmax) {
  68   if (! ctrl) ctrl = this;
  69
  70   basedisplay = dpy;
  71   screeninfo = scrn;
  72   setDither(_dither);
  73   setColorsPerChannel(_cpc);
  74
  75   cache_max = cmax;
  76   if (cache_timeout) {
  77     timer = new BTimer(basedisplay, this);
  78     timer->setTimeout(cache_timeout);
  79     timer->start();
  80   } else {
  81     timer = (BTimer *) 0;
  82   }
  83
  84   colors = (XColor *) 0;
  85   ncolors = 0;
  86
  87   grad_xbuffer = grad_ybuffer = (unsigned int *) 0;
  88   grad_buffer_width = grad_buffer_height = 0;
  89
  90   sqrt_table = (unsigned long *) 0;
  91
  92   screen_depth = screeninfo->getDepth();
  93   window = screeninfo->getRootWindow();
  94   screen_number = screeninfo->getScreenNumber();
  95   colormap = screeninfo->getColormap();
  96
  97   int count;
  98   XPixmapFormatValues *pmv = XListPixmapFormats(basedisplay->getXDisplay(),
  99                                                 &count);
 100   if (pmv) {
 101     bits_per_pixel = 0;
 102     for (int i = 0; i < count; i++)
 103       if (pmv[i].depth == screen_depth) {
 104         bits_per_pixel = pmv[i].bits_per_pixel;
 105         break;
 106       }
 107
 108     XFree(pmv);
 109   }
 110
 111   if (bits_per_pixel == 0) bits_per_pixel = screen_depth;
 112   if (bits_per_pixel >= 24) setDither(False);
 113
 114   red_offset = green_offset = blue_offset = 0;
 115
 116   switch (getVisual()->c_class) {
 117   case TrueColor: {
 118     int i;
 119
 120     // compute color tables
 121     unsigned long red_mask = getVisual()->red_mask,
 122       green_mask = getVisual()->green_mask,
 123       blue_mask = getVisual()->blue_mask;
 124
 125     while (! (red_mask & 1)) { red_offset++; red_mask >>= 1; }
 126     while (! (green_mask & 1)) { green_offset++; green_mask >>= 1; }
 127     while (! (blue_mask & 1)) { blue_offset++; blue_mask >>= 1; }
 128
 129     red_bits = 255 / red_mask;
 130     green_bits = 255 / green_mask;
 131     blue_bits = 255 / blue_mask;
 132
 133     for (i = 0; i < 256; i++) {
 134       red_color_table[i] = i / red_bits;
 135       green_color_table[i] = i / green_bits;
 136       blue_color_table[i] = i / blue_bits;
 137     }
 138     break;
 139   }
 140
 141   case PseudoColor:
 142   case StaticColor: {
 143     ncolors = colors_per_channel * colors_per_channel * colors_per_channel;
 144
 145     if (ncolors > (1 << screen_depth)) {
 146       colors_per_channel = (1 << screen_depth) / 3;
 147       ncolors = colors_per_channel * colors_per_channel * colors_per_channel;
 148     }
 149
 150     if (colors_per_channel < 2 || ncolors > (1 << screen_depth)) {
 151       fprintf(stderr,
 152               "BImageControl::BImageControl: invalid colormap size %d "
 153               "(%d/%d/%d) - reducing",
 154               ncolors, colors_per_channel, colors_per_channel,
 155               colors_per_channel);
 156
 157       colors_per_channel = (1 << screen_depth) / 3;
 158     }
 159
 160     colors = new XColor[ncolors];
 161     if (! colors) {
 162       fprintf(stderr, "BImageControl::BImageControl: error allocating "
 163               "colormap\n");
 164       exit(1);
 165     }
 166
 167     int i = 0, ii, p, r, g, b,
 168
 169 #ifdef ORDEREDPSEUDO
 170       bits = 256 / colors_per_channel;
 171 #else // !ORDEREDPSEUDO
 172     bits = 255 / (colors_per_channel - 1);
 173 #endif // ORDEREDPSEUDO
 174
 175     red_bits = green_bits = blue_bits = bits;
 176
 177     for (i = 0; i < 256; i++)
 178       red_color_table[i] = green_color_table[i] = blue_color_table[i] =
 179         i / bits;
 180
 181     for (r = 0, i = 0; r < colors_per_channel; r++)
 182       for (g = 0; g < colors_per_channel; g++)
 183         for (b = 0; b < colors_per_channel; b++, i++) {
 184           colors[i].red = (r * 0xffff) / (colors_per_channel - 1);
 185           colors[i].green = (g * 0xffff) / (colors_per_channel - 1);
 186           colors[i].blue = (b * 0xffff) / (colors_per_channel - 1);;
 187           colors[i].flags = DoRed|DoGreen|DoBlue;
 188         }
 189
 190     for (i = 0; i < ncolors; i++) {
 191       if (! XAllocColor(basedisplay->getXDisplay(), colormap, &colors[i])) {
 192         fprintf(stderr, "couldn't alloc color %i %i %i\n",
 193                 colors[i].red, colors[i].green, colors[i].blue);
 194         colors[i].flags = 0;
 195       } else {
 196         colors[i].flags = DoRed|DoGreen|DoBlue;
 197       }
 198     }
 199
 200     XColor icolors[256];
 201     int incolors = (((1 << screen_depth) > 256) ? 256 : (1 << screen_depth));
 202
 203     for (i = 0; i < incolors; i++)
 204       icolors[i].pixel = i;
 205
 206     XQueryColors(basedisplay->getXDisplay(), colormap, icolors, incolors);
 207     for (i = 0; i < ncolors; i++) {
 208       if (! colors[i].flags) {
 209         unsigned long chk = 0xffffffff, pixel, close = 0;
 210
 211         p = 2;
 212         while (p--) {
 213           for (ii = 0; ii < incolors; ii++) {
 214             r = (colors[i].red - icolors[i].red) >> 8;
 215             g = (colors[i].green - icolors[i].green) >> 8;
 216             b = (colors[i].blue - icolors[i].blue) >> 8;
 217             pixel = (r * r) + (g * g) + (b * b);
 218
 219             if (pixel < chk) {
 220               chk = pixel;
 221               close = ii;
 222             }
 223
 224             colors[i].red = icolors[close].red;
 225             colors[i].green = icolors[close].green;
 226             colors[i].blue = icolors[close].blue;
 227
 228             if (XAllocColor(basedisplay->getXDisplay(), colormap,
 229                             &colors[i])) {
 230               colors[i].flags = DoRed|DoGreen|DoBlue;
 231               break;
 232             }
 233           }
 234         }
 235       }
 236     }
 237
 238     break;
 239   }
 240
 241   case GrayScale:
 242   case StaticGray: {
 243     if (getVisual()->c_class == StaticGray) {
 244       ncolors = 1 << screen_depth;
 245     } else {
 246       ncolors = colors_per_channel * colors_per_channel * colors_per_channel;
 247
 248       if (ncolors > (1 << screen_depth)) {
 249         colors_per_channel = (1 << screen_depth) / 3;
 250         ncolors =
 251           colors_per_channel * colors_per_channel * colors_per_channel;
 252       }
 253     }
 254
 255     if (colors_per_channel < 2 || ncolors > (1 << screen_depth)) {
 256       fprintf(stderr,
 257               "BImageControl::BImageControl: invalid colormap size %d "
 258               "(%d/%d/%d) - reducing",
 259               ncolors, colors_per_channel, colors_per_channel,
 260               colors_per_channel);
 261
 262       colors_per_channel = (1 << screen_depth) / 3;
 263     }
 264
 265     colors = new XColor[ncolors];
 266     if (! colors) {
 267       fprintf(stderr,
 268               "BImageControl::BImageControl: error allocating colormap\n");
 269       exit(1);
 270     }
 271
 272     int i = 0, ii, p, bits = 255 / (colors_per_channel - 1);
 273     red_bits = green_bits = blue_bits = bits;
 274
 275     for (i = 0; i < 256; i++)
 276       red_color_table[i] = green_color_table[i] = blue_color_table[i] =
 277         i / bits;
 278
 279     for (i = 0; i < ncolors; i++) {
 280       colors[i].red = (i * 0xffff) / (colors_per_channel - 1);
 281       colors[i].green = (i * 0xffff) / (colors_per_channel - 1);
 282       colors[i].blue = (i * 0xffff) / (colors_per_channel - 1);;
 283       colors[i].flags = DoRed|DoGreen|DoBlue;
 284
 285       if (! XAllocColor(basedisplay->getXDisplay(), colormap,
 286                         &colors[i])) {
 287         fprintf(stderr, "couldn't alloc color %i %i %i\n",
 288                 colors[i].red, colors[i].green, colors[i].blue);
 289         colors[i].flags = 0;
 290       } else {
 291         colors[i].flags = DoRed|DoGreen|DoBlue;
 292       }
 293     }
 294
 295     XColor icolors[256];
 296     int incolors = (((1 << screen_depth) > 256) ? 256 :
 297                     (1 << screen_depth));
 298
 299     for (i = 0; i < incolors; i++)
 300       icolors[i].pixel = i;
 301
 302     XQueryColors(basedisplay->getXDisplay(), colormap, icolors, incolors);
 303     for (i = 0; i < ncolors; i++) {
 304       if (! colors[i].flags) {
 305         unsigned long chk = 0xffffffff, pixel, close = 0;
 306
 307         p = 2;
 308         while (p--) {
 309           for (ii = 0; ii < incolors; ii++) {
 310             int r = (colors[i].red - icolors[i].red) >> 8;
 311             int g = (colors[i].green - icolors[i].green) >> 8;
 312             int b = (colors[i].blue - icolors[i].blue) >> 8;
 313             pixel = (r * r) + (g * g) + (b * b);
 314
 315             if (pixel < chk) {
 316               chk = pixel;
 317               close = ii;
 318             }
 319
 320             colors[i].red = icolors[close].red;
 321             colors[i].green = icolors[close].green;
 322             colors[i].blue = icolors[close].blue;
 323
 324             if (XAllocColor(basedisplay->getXDisplay(), colormap,
 325                             &colors[i])) {
 326               colors[i].flags = DoRed|DoGreen|DoBlue;
 327               break;
 328             }
 329           }
 330         }
 331       }
 332     }
 333
 334     break;
 335   }
 336
 337   default:
 338     fprintf(stderr, "BImageControl::BImageControl: unsupported visual %d\n",
 339             getVisual()->c_class);
 340     exit(1);
 341   }
 342 }
 343
 344
 345 BImageControl::~BImageControl(void) {
 346   delete [] sqrt_table;
 347
 348   delete [] grad_xbuffer;
 349
 350   delete [] grad_ybuffer;
 351
 352   if (colors) {
 353     unsigned long *pixels = new unsigned long [ncolors];
 354
 355     for (int i = 0; i < ncolors; i++)
 356       *(pixels + i) = (*(colors + i)).pixel;
 357
 358     XFreeColors(basedisplay->getXDisplay(), colormap, pixels, ncolors, 0);
 359
 360     delete [] colors;
 361   }
 362
 363   if (! cache.empty()) {
 364     //#ifdef DEBUG
 365     fprintf(stderr, "BImageContol::~BImageControl: pixmap cache - "
 366             "releasing %d pixmaps\n", cache.size());
 367     //#endif
 368     CacheContainer::iterator it = cache.begin();
 369     const CacheContainer::iterator end = cache.end();
 370     for (; it != end; ++it)
 371       XFreePixmap(basedisplay->getXDisplay(), it->pixmap);
 372   }
 373   if (timer) {
 374     timer->stop();
 375     delete timer;
 376   }
 377 }
 378
 379
 380 Pixmap BImageControl::searchCache(const unsigned int width,
 381                                   const unsigned int height,
 382                                   const unsigned long texture,
 383                                   const BColor &c1, const BColor &c2) {
 384   if (cache.empty())
 385     return None;
 386
 387   CacheContainer::iterator it = cache.begin();
 388   const CacheContainer::iterator end = cache.end();
 389   for (; it != end; ++it) {
 390     CachedImage& tmp = *it;
 391     if (tmp.width == width && tmp.height == height &&
 392         tmp.texture == texture && tmp.pixel1 == c1.pixel())
 393       if (texture & BTexture::Gradient) {
 394         if (tmp.pixel2 == c2.pixel()) {
 395           tmp.count++;
 396           return tmp.pixmap;
 397         }
 398       } else {
 399         tmp.count++;
 400         return tmp.pixmap;
 401       }
 402   }
 403   return None;
 404 }
 405
 406
 407 Pixmap BImageControl::renderImage(unsigned int width, unsigned int height,
 408                                   const BTexture &texture) {
 409   if (texture.texture() & BTexture::Parent_Relative) return ParentRelative;
 410
 411   Pixmap pixmap = searchCache(width, height, texture.texture(),
 412                               texture.color(), texture.colorTo());
 413   if (pixmap) return pixmap;
 414
 415   BImage image(this, width, height);
 416   pixmap = image.render(texture);
 417
 418   if (! pixmap)
 419     return None;
 420
 421   CachedImage tmp;
 422
 423   tmp.pixmap = pixmap;
 424   tmp.width = width;
 425   tmp.height = height;
 426   tmp.count = 1;
 427   tmp.texture = texture.texture();
 428   tmp.pixel1 = texture.color().pixel();
 429
 430   if (texture.texture() & BTexture::Gradient)
 431     tmp.pixel2 = texture.colorTo().pixel();
 432   else
 433     tmp.pixel2 = 0l;
 434
 435   cache.push_back(tmp);
 436
 437   if (cache.size() > cache_max) {
 438 #ifdef    DEBUG
 439     fprintf(stderr, "BImageControl::renderImage: cache is large, "
 440       "forcing cleanout\n");
 441 #endif // DEBUG
 442
 443     timeout();
 444   }
 445
 446   return pixmap;
 447 }
 448
 449
 450 void BImageControl::removeImage(Pixmap pixmap) {
 451   if (! pixmap)
 452     return;
 453
 454   CacheContainer::iterator it = cache.begin();
 455   const CacheContainer::iterator end = cache.end();
 456   for (; it != end; ++it) {
 457     CachedImage &tmp = *it;
 458     if (tmp.pixmap == pixmap && tmp.count > 0)
 459       tmp.count--;
 460   }
 461
 462   if (! timer)
 463     timeout();
 464 }
 465
 466
 467 void BImageControl::getColorTables(unsigned char **rmt, unsigned char **gmt,
 468                                    unsigned char **bmt,
 469                                    int *roff, int *goff, int *boff,
 470                                    int *rbit, int *gbit, int *bbit) {
 471   if (rmt) *rmt = red_color_table;
 472   if (gmt) *gmt = green_color_table;
 473   if (bmt) *bmt = blue_color_table;
 474
 475   if (roff) *roff = red_offset;
 476   if (goff) *goff = green_offset;
 477   if (boff) *boff = blue_offset;
 478
 479   if (rbit) *rbit = red_bits;
 480   if (gbit) *gbit = green_bits;
 481   if (bbit) *bbit = blue_bits;
 482 }
 483
 484
 485 void BImageControl::getXColorTable(XColor **c, int *n) {
 486   if (c) *c = colors;
 487   if (n) *n = ncolors;
 488 }
 489
 490
 491 void BImageControl::getGradientBuffers(unsigned int w,
 492                                        unsigned int h,
 493                                        unsigned int **xbuf,
 494                                        unsigned int **ybuf)
 495 {
 496   if (w > grad_buffer_width) {
 497     if (grad_xbuffer)
 498       delete [] grad_xbuffer;
 499
 500     grad_buffer_width = w;
 501
 502     grad_xbuffer = new unsigned int[grad_buffer_width * 3];
 503   }
 504
 505   if (h > grad_buffer_height) {
 506     if (grad_ybuffer)
 507       delete [] grad_ybuffer;
 508
 509     grad_buffer_height = h;
 510
 511     grad_ybuffer = new unsigned int[grad_buffer_height * 3];
 512   }
 513
 514   *xbuf = grad_xbuffer;
 515   *ybuf = grad_ybuffer;
 516 }
 517
 518
 519 void BImageControl::installRootColormap(void) {
 520   int ncmap = 0;
 521   Colormap *cmaps =
 522     XListInstalledColormaps(basedisplay->getXDisplay(), window, &ncmap);
 523
 524   if (cmaps) {
 525     bool install = True;
 526     for (int i = 0; i < ncmap; i++)
 527       if (*(cmaps + i) == colormap)
 528         install = False;
 529
 530     if (install)
 531       XInstallColormap(basedisplay->getXDisplay(), colormap);
 532
 533     XFree(cmaps);
 534   }
 535 }
 536
 537
 538 void BImageControl::setColorsPerChannel(int cpc) {
 539   if (cpc < 2) cpc = 2;
 540   if (cpc > 6) cpc = 6;
 541
 542   colors_per_channel = cpc;
 543 }
 544
 545
 546 unsigned long BImageControl::getSqrt(unsigned int x) {
 547   if (! sqrt_table) {
 548     // build sqrt table for use with elliptic gradient
 549
 550     sqrt_table = new unsigned long[(256 * 256 * 2) + 1];
 551
 552     for (int i = 0; i < (256 * 256 * 2); i++)
 553       *(sqrt_table + i) = bsqrt(i);
 554   }
 555
 556   return (*(sqrt_table + x));
 557 }
 558
 559
 560 struct ZeroRefCheck {
 561   inline bool operator()(const BImageControl::CachedImage &image) const {
 562     return (image.count == 0);
 563   }
 564 };
 565
 566 struct CacheCleaner {
 567   Display *display;
 568   ZeroRefCheck ref_check;
 569   CacheCleaner(Display *d): display(d) {}
 570   inline void operator()(const BImageControl::CachedImage& image) const {
 571     if (ref_check(image))
 572       XFreePixmap(display, image.pixmap);
 573   }
 574 };
 575
 576
 577 void BImageControl::timeout(void) {
 578   CacheCleaner cleaner(basedisplay->getXDisplay());
 579   std::for_each(cache.begin(), cache.end(), cleaner);
 580   cache.remove_if(cleaner.ref_check);
 581 }
 582