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

   1 // -*- mode: C++; indent-tabs-mode: nil; -*-
   2
   3 #ifdef    HAVE_CONFIG_H
   4 #  include "../config.h"
   5 #endif // HAVE_CONFIG_H
   6
   7 #ifdef    HAVE_STDIO_H
   8 #  include <stdio.h>
   9 #endif // HAVE_STDIO_H
  10
  11 #include <algorithm>
  12 using std::max;
  13 using std::min;
  14
  15 #include "display.hh"
  16 #include "gccache.hh"
  17 #include "image.hh"
  18 #include "texture.hh"
  19
  20 namespace otk {
  21
  22 BImage::BImage(BImageControl *c, int w, int h) {
  23   control = c;
  24
  25   width = (w > 0) ? w : 1;
  26   height = (h > 0) ? h : 1;
  27
  28   red = new unsigned char[width * height];
  29   green = new unsigned char[width * height];
  30   blue = new unsigned char[width * height];
  31
  32   xtable = ytable = (unsigned int *) 0;
  33
  34   cpc = control->getColorsPerChannel();
  35   cpccpc = cpc * cpc;
  36
  37   control->getColorTables(&red_table, &green_table, &blue_table,
  38                           &red_offset, &green_offset, &blue_offset,
  39                           &red_bits, &green_bits, &blue_bits);
  40
  41   if (control->getVisual()->c_class != TrueColor)
  42     control->getXColorTable(&colors, &ncolors);
  43 }
  44
  45
  46 BImage::~BImage(void) {
  47   delete [] red;
  48   delete [] green;
  49   delete [] blue;
  50 }
  51
  52
  53 Pixmap BImage::render(const BTexture &texture) {
  54   if (texture.texture() & BTexture::Parent_Relative)
  55     return ParentRelative;
  56   else if (texture.texture() & BTexture::Solid)
  57     return render_solid(texture);
  58   else if (texture.texture() & BTexture::Gradient)
  59     return render_gradient(texture);
  60   return None;
  61 }
  62
  63
  64 Pixmap BImage::render_solid(const BTexture &texture) {
  65   Pixmap pixmap = XCreatePixmap(OBDisplay::display,
  66                                 control->getDrawable(), width,
  67                                 height, control->getDepth());
  68   if (pixmap == None) {
  69     fprintf(stderr, "BImage::render_solid: error creating pixmap\n");
  70     return None;
  71   }
  72
  73   BPen pen(texture.color());
  74   BPen penlight(texture.lightColor());
  75   BPen penshadow(texture.shadowColor());
  76
  77   XFillRectangle(OBDisplay::display, pixmap, pen.gc(), 0, 0, width, height);
  78
  79   if (texture.texture() & BTexture::Interlaced) {
  80     BPen peninterlace(texture.colorTo());
  81     for (unsigned int i = 0; i < height; i += 2)
  82       XDrawLine(OBDisplay::display, pixmap, peninterlace.gc(), 0, i, width, i);
  83   }
  84
  85   int left = 0, top = 0, right = width - 1, bottom = height - 1;
  86
  87   if (texture.texture() & BTexture::Border) {
  88     BPen penborder(texture.borderColor());
  89     XDrawRectangle(OBDisplay::display, pixmap, penborder.gc(),
  90                    left, top, right, bottom);
  91   }
  92
  93   if (texture.texture() & BTexture::Bevel1) {
  94     if (texture.texture() & BTexture::Raised) {
  95       XDrawLine(OBDisplay::display, pixmap, penshadow.gc(),
  96                 left, bottom, right, bottom);
  97       XDrawLine(OBDisplay::display, pixmap, penshadow.gc(),
  98                 right, bottom, right, top);
  99
 100       XDrawLine(OBDisplay::display, pixmap, penlight.gc(),
 101                 left, top, right, top);
 102       XDrawLine(OBDisplay::display, pixmap, penlight.gc(),
 103                 left, bottom, left, top);
 104     } else if (texture.texture() & BTexture::Sunken) {
 105       XDrawLine(OBDisplay::display, pixmap, penlight.gc(),
 106                 left, bottom, right, bottom);
 107       XDrawLine(OBDisplay::display, pixmap, penlight.gc(),
 108                 right, bottom, right, top);
 109
 110       XDrawLine(OBDisplay::display, pixmap, penshadow.gc(),
 111                 left, top, right, top);
 112       XDrawLine(OBDisplay::display, pixmap, penshadow.gc(),
 113                 left, bottom, left, top);
 114     }
 115   } else if (texture.texture() & BTexture::Bevel2) {
 116     if (texture.texture() & BTexture::Raised) {
 117       XDrawLine(OBDisplay::display, pixmap, penshadow.gc(),
 118                 left + 1, bottom - 2, right - 2, bottom - 2);
 119       XDrawLine(OBDisplay::display, pixmap, penshadow.gc(),
 120                 right - 2, bottom - 2, right - 2, top + 1);
 121
 122       XDrawLine(OBDisplay::display, pixmap, penlight.gc(),
 123                 left + 1, top + 1, right - 2, top + 1);
 124       XDrawLine(OBDisplay::display, pixmap, penlight.gc(),
 125                 left + 1, bottom - 2, left + 1, top + 1);
 126     } else if (texture.texture() & BTexture::Sunken) {
 127       XDrawLine(OBDisplay::display, pixmap, penlight.gc(),
 128                 left + 1, bottom - 2, right - 2, bottom - 2);
 129       XDrawLine(OBDisplay::display, pixmap, penlight.gc(),
 130                 right - 2, bottom - 2, right - 2, top + 1);
 131
 132       XDrawLine(OBDisplay::display, pixmap, penshadow.gc(),
 133                 left + 1, top + 1, right - 2, top + 1);
 134       XDrawLine(OBDisplay::display, pixmap, penshadow.gc(),
 135                 left + 1, bottom - 2, left + 1, top + 1);
 136     }
 137   }
 138
 139   return pixmap;
 140 }
 141
 142
 143 Pixmap BImage::render_gradient(const BTexture &texture) {
 144   bool inverted = False;
 145
 146   interlaced = texture.texture() & BTexture::Interlaced;
 147
 148   if (texture.texture() & BTexture::Sunken) {
 149     from = texture.colorTo();
 150     to = texture.color();
 151
 152     if (! (texture.texture() & BTexture::Invert)) inverted = True;
 153   } else {
 154     from = texture.color();
 155     to = texture.colorTo();
 156
 157     if (texture.texture() & BTexture::Invert) inverted = True;
 158   }
 159
 160   control->getGradientBuffers(width, height, &xtable, &ytable);
 161
 162   if (texture.texture() & BTexture::Diagonal) dgradient();
 163   else if (texture.texture() & BTexture::Elliptic) egradient();
 164   else if (texture.texture() & BTexture::Horizontal) hgradient();
 165   else if (texture.texture() & BTexture::Pyramid) pgradient();
 166   else if (texture.texture() & BTexture::Rectangle) rgradient();
 167   else if (texture.texture() & BTexture::Vertical) vgradient();
 168   else if (texture.texture() & BTexture::CrossDiagonal) cdgradient();
 169   else if (texture.texture() & BTexture::PipeCross) pcgradient();
 170
 171   if (texture.texture() & BTexture::Bevel1) bevel1();
 172   else if (texture.texture() & BTexture::Bevel2) bevel2();
 173
 174   if (texture.texture() & BTexture::Border) border(texture);
 175
 176   if (inverted) invert();
 177
 178   return renderPixmap();
 179
 180 }
 181
 182
 183 static const unsigned char dither4[4][4] = {
 184   {0, 4, 1, 5},
 185   {6, 2, 7, 3},
 186   {1, 5, 0, 4},
 187   {7, 3, 6, 2}
 188 };
 189
 190
 191 /*
 192  * Helper function for TrueColorDither and renderXImage
 193  *
 194  * This handles the proper setting of the image data based on the image depth
 195  * and the machine's byte ordering
 196  */
 197 static inline
 198 void assignPixelData(unsigned int bit_depth, unsigned char **data,
 199                      unsigned long pixel) {
 200   unsigned char *pixel_data = *data;
 201   switch (bit_depth) {
 202   case  8: //  8bpp
 203     *pixel_data++ = pixel;
 204     break;
 205
 206   case 16: // 16bpp LSB
 207     *pixel_data++ = pixel;
 208     *pixel_data++ = pixel >> 8;
 209     break;
 210
 211   case 17: // 16bpp MSB
 212     *pixel_data++ = pixel >> 8;
 213     *pixel_data++ = pixel;
 214     break;
 215
 216   case 24: // 24bpp LSB
 217     *pixel_data++ = pixel;
 218     *pixel_data++ = pixel >> 8;
 219     *pixel_data++ = pixel >> 16;
 220     break;
 221
 222   case 25: // 24bpp MSB
 223     *pixel_data++ = pixel >> 16;
 224     *pixel_data++ = pixel >> 8;
 225     *pixel_data++ = pixel;
 226     break;
 227
 228   case 32: // 32bpp LSB
 229     *pixel_data++ = pixel;
 230     *pixel_data++ = pixel >> 8;
 231     *pixel_data++ = pixel >> 16;
 232     *pixel_data++ = pixel >> 24;
 233     break;
 234
 235   case 33: // 32bpp MSB
 236     *pixel_data++ = pixel >> 24;
 237     *pixel_data++ = pixel >> 16;
 238     *pixel_data++ = pixel >> 8;
 239     *pixel_data++ = pixel;
 240     break;
 241   }
 242   *data = pixel_data; // assign back so we don't lose our place
 243 }
 244
 245
 246 // algorithm: ordered dithering... many many thanks to rasterman
 247 // (raster@rasterman.com) for telling me about this... portions of this
 248 // code is based off of his code in Imlib
 249 void BImage::TrueColorDither(unsigned int bit_depth, int bytes_per_line,
 250                              unsigned char *pixel_data) {
 251   unsigned int x, y, dithx, dithy, r, g, b, er, eg, eb, offset;
 252   unsigned char *ppixel_data = pixel_data;
 253   unsigned long pixel;
 254
 255   for (y = 0, offset = 0; y < height; y++) {
 256     dithy = y & 0x3;
 257
 258     for (x = 0; x < width; x++, offset++) {
 259       dithx = x & 0x3;
 260       r = red[offset];
 261       g = green[offset];
 262       b = blue[offset];
 263
 264       er = r & (red_bits - 1);
 265       eg = g & (green_bits - 1);
 266       eb = b & (blue_bits - 1);
 267
 268       r = red_table[r];
 269       g = green_table[g];
 270       b = blue_table[b];
 271
 272       if ((dither4[dithy][dithx] < er) && (r < red_table[255])) r++;
 273       if ((dither4[dithy][dithx] < eg) && (g < green_table[255])) g++;
 274       if ((dither4[dithy][dithx] < eb) && (b < blue_table[255])) b++;
 275
 276       pixel = (r << red_offset) | (g << green_offset) | (b << blue_offset);
 277       assignPixelData(bit_depth, &pixel_data, pixel);
 278     }
 279
 280     pixel_data = (ppixel_data += bytes_per_line);
 281   }
 282 }
 283
 284 #ifdef ORDEREDPSEUDO
 285 const static unsigned char dither8[8][8] = {
 286   { 0,  32, 8,  40, 2,  34, 10, 42},
 287   { 48, 16, 56, 24, 50, 18, 58, 26},
 288   { 12, 44, 4,  36, 14, 46, 6,  38},
 289   { 60, 28, 52, 20, 62, 30, 54, 22},
 290   { 3,  35, 11, 43, 1,  33, 9,  41},
 291   { 51, 19, 59, 27, 49, 17, 57, 25},
 292   { 15, 47, 7,  39, 13, 45, 5,  37},
 293   { 63, 31, 55, 23, 61, 29, 53, 21}
 294 };
 295
 296 void BImage::OrderedPseudoColorDither(int bytes_per_line,
 297                                       unsigned char *pixel_data) {
 298   unsigned int x, y, dithx, dithy, r, g, b, er, eg, eb, offset;
 299   unsigned long pixel;
 300   unsigned char *ppixel_data = pixel_data;
 301
 302   for (y = 0, offset = 0; y < height; y++) {
 303     dithy = y & 7;
 304
 305     for (x = 0; x < width; x++, offset++) {
 306       dithx = x & 7;
 307
 308       r = red[offset];
 309       g = green[offset];
 310       b = blue[offset];
 311
 312       er = r & (red_bits - 1);
 313       eg = g & (green_bits - 1);
 314       eb = b & (blue_bits - 1);
 315
 316       r = red_table[r];
 317       g = green_table[g];
 318       b = blue_table[b];
 319
 320       if ((dither8[dithy][dithx] < er) && (r < red_table[255])) r++;
 321       if ((dither8[dithy][dithx] < eg) && (g < green_table[255])) g++;
 322       if ((dither8[dithy][dithx] < eb) && (b < blue_table[255])) b++;
 323
 324       pixel = (r * cpccpc) + (g * cpc) + b;
 325       *(pixel_data++) = colors[pixel].pixel;
 326     }
 327
 328     pixel_data = (ppixel_data += bytes_per_line);
 329   }
 330 }
 331 #endif
 332
 333 void BImage::PseudoColorDither(int bytes_per_line, unsigned char *pixel_data) {
 334   short *terr,
 335     *rerr = new short[width + 2],
 336     *gerr = new short[width + 2],
 337     *berr = new short[width + 2],
 338     *nrerr = new short[width + 2],
 339     *ngerr = new short[width + 2],
 340     *nberr = new short[width + 2];
 341
 342   int rr, gg, bb, rer, ger, ber;
 343   int dd = 255 / control->getColorsPerChannel();
 344   unsigned int x, y, r, g, b, offset;
 345   unsigned long pixel;
 346   unsigned char *ppixel_data = pixel_data;
 347
 348   for (x = 0; x < width; x++) {
 349     *(rerr + x) = *(red + x);
 350     *(gerr + x) = *(green + x);
 351     *(berr + x) = *(blue + x);
 352   }
 353
 354   *(rerr + x) = *(gerr + x) = *(berr + x) = 0;
 355
 356   for (y = 0, offset = 0; y < height; y++) {
 357     if (y < (height - 1)) {
 358       int i = offset + width;
 359       for (x = 0; x < width; x++, i++) {
 360         *(nrerr + x) = *(red + i);
 361         *(ngerr + x) = *(green + i);
 362         *(nberr + x) = *(blue + i);
 363       }
 364
 365       *(nrerr + x) = *(red + (--i));
 366       *(ngerr + x) = *(green + i);
 367       *(nberr + x) = *(blue + i);
 368     }
 369
 370     for (x = 0; x < width; x++) {
 371       rr = rerr[x];
 372       gg = gerr[x];
 373       bb = berr[x];
 374
 375       if (rr > 255) rr = 255; else if (rr < 0) rr = 0;
 376       if (gg > 255) gg = 255; else if (gg < 0) gg = 0;
 377       if (bb > 255) bb = 255; else if (bb < 0) bb = 0;
 378
 379       r = red_table[rr];
 380       g = green_table[gg];
 381       b = blue_table[bb];
 382
 383       rer = rerr[x] - r*dd;
 384       ger = gerr[x] - g*dd;
 385       ber = berr[x] - b*dd;
 386
 387       pixel = (r * cpccpc) + (g * cpc) + b;
 388       *pixel_data++ = colors[pixel].pixel;
 389
 390       r = rer >> 1;
 391       g = ger >> 1;
 392       b = ber >> 1;
 393       rerr[x+1] += r;
 394       gerr[x+1] += g;
 395       berr[x+1] += b;
 396       nrerr[x] += r;
 397       ngerr[x] += g;
 398       nberr[x] += b;
 399     }
 400
 401     offset += width;
 402
 403     pixel_data = (ppixel_data += bytes_per_line);
 404
 405     terr = rerr;
 406     rerr = nrerr;
 407     nrerr = terr;
 408
 409     terr = gerr;
 410     gerr = ngerr;
 411     ngerr = terr;
 412
 413     terr = berr;
 414     berr = nberr;
 415     nberr = terr;
 416   }
 417
 418   delete [] rerr;
 419   delete [] gerr;
 420   delete [] berr;
 421   delete [] nrerr;
 422   delete [] ngerr;
 423   delete [] nberr;
 424 }
 425
 426 XImage *BImage::renderXImage(void) {
 427   XImage *image =
 428     XCreateImage(OBDisplay::display,
 429                  control->getVisual(), control->getDepth(), ZPixmap, 0, 0,
 430                  width, height, 32, 0);
 431
 432   if (! image) {
 433     fprintf(stderr, "BImage::renderXImage: error creating XImage\n");
 434     return (XImage *) 0;
 435   }
 436
 437   // insurance policy
 438   image->data = (char *) 0;
 439
 440   unsigned char *d = new unsigned char[image->bytes_per_line * (height + 1)];
 441
 442   unsigned int o = image->bits_per_pixel +
 443     ((image->byte_order == MSBFirst) ? 1 : 0);
 444
 445   bool unsupported = False;
 446
 447   if (control->doDither() && width > 1 && height > 1) {
 448     switch (control->getVisual()->c_class) {
 449     case TrueColor:
 450       TrueColorDither(o, image->bytes_per_line, d);
 451       break;
 452
 453     case StaticColor:
 454     case PseudoColor: {
 455 #ifdef ORDEREDPSEUDO
 456       OrderedPseudoColorDither(image->bytes_per_line, d);
 457 #else
 458       PseudoColorDither(image->bytes_per_line, d);
 459 #endif
 460       break;
 461     }
 462
 463     default:
 464       unsupported = True;
 465     }
 466   } else {
 467     unsigned int x, y, r, g, b, offset;
 468     unsigned char *pixel_data = d, *ppixel_data = d;
 469     unsigned long pixel;
 470
 471     switch (control->getVisual()->c_class) {
 472     case StaticColor:
 473     case PseudoColor:
 474       for (y = 0, offset = 0; y < height; ++y) {
 475         for (x = 0; x < width; ++x, ++offset) {
 476           r = red_table[red[offset]];
 477           g = green_table[green[offset]];
 478           b = blue_table[blue[offset]];
 479
 480           pixel = (r * cpccpc) + (g * cpc) + b;
 481           *pixel_data++ = colors[pixel].pixel;
 482         }
 483
 484         pixel_data = (ppixel_data += image->bytes_per_line);
 485       }
 486
 487       break;
 488
 489     case TrueColor:
 490       for (y = 0, offset = 0; y < height; y++) {
 491         for (x = 0; x < width; x++, offset++) {
 492           r = red_table[red[offset]];
 493           g = green_table[green[offset]];
 494           b = blue_table[blue[offset]];
 495
 496           pixel = (r << red_offset) | (g << green_offset) | (b << blue_offset);
 497           assignPixelData(o, &pixel_data, pixel);
 498         }
 499
 500         pixel_data = (ppixel_data += image->bytes_per_line);
 501       }
 502
 503       break;
 504
 505     case StaticGray:
 506     case GrayScale:
 507       for (y = 0, offset = 0; y < height; y++) {
 508         for (x = 0; x < width; x++, offset++) {
 509           r = *(red_table + *(red + offset));
 510           g = *(green_table + *(green + offset));
 511           b = *(blue_table + *(blue + offset));
 512
 513           g = ((r * 30) + (g * 59) + (b * 11)) / 100;
 514           *pixel_data++ = colors[g].pixel;
 515         }
 516
 517         pixel_data = (ppixel_data += image->bytes_per_line);
 518       }
 519
 520       break;
 521
 522     default:
 523       unsupported = True;
 524     }
 525   }
 526
 527   if (unsupported) {
 528     fprintf(stderr, "BImage::renderXImage: unsupported visual\n");
 529     delete [] d;
 530     XDestroyImage(image);
 531     return (XImage *) 0;
 532   }
 533
 534   image->data = (char *) d;
 535
 536   return image;
 537 }
 538
 539
 540 Pixmap BImage::renderPixmap(void) {
 541   Pixmap pixmap =
 542     XCreatePixmap(OBDisplay::display,
 543                   control->getDrawable(), width, height, control->getDepth());
 544
 545   if (pixmap == None) {
 546     fprintf(stderr, "BImage::renderPixmap: error creating pixmap\n");
 547     return None;
 548   }
 549
 550   XImage *image = renderXImage();
 551
 552   if (! image) {
 553     XFreePixmap(OBDisplay::display, pixmap);
 554     return None;
 555   }
 556
 557   if (! image->data) {
 558     XDestroyImage(image);
 559     XFreePixmap(OBDisplay::display, pixmap);
 560     return None;
 561   }
 562
 563   XPutImage(OBDisplay::display, pixmap,
 564             DefaultGC(OBDisplay::display,
 565                       control->getScreenInfo()->getScreenNumber()),
 566             image, 0, 0, 0, 0, width, height);
 567
 568   if (image->data) {
 569     delete [] image->data;
 570     image->data = NULL;
 571   }
 572
 573   XDestroyImage(image);
 574
 575   return pixmap;
 576 }
 577
 578
 579 void BImage::bevel1(void) {
 580   if (width > 2 && height > 2) {
 581     unsigned char *pr = red, *pg = green, *pb = blue;
 582
 583     register unsigned char r, g, b, rr ,gg ,bb;
 584     register unsigned int w = width, h = height - 1, wh = w * h;
 585
 586     while (--w) {
 587       r = *pr;
 588       rr = r + (r >> 1);
 589       if (rr < r) rr = ~0;
 590       g = *pg;
 591       gg = g + (g >> 1);
 592       if (gg < g) gg = ~0;
 593       b = *pb;
 594       bb = b + (b >> 1);
 595       if (bb < b) bb = ~0;
 596
 597       *pr = rr;
 598       *pg = gg;
 599       *pb = bb;
 600
 601       r = *(pr + wh);
 602       rr = (r >> 2) + (r >> 1);
 603       if (rr > r) rr = 0;
 604       g = *(pg + wh);
 605       gg = (g >> 2) + (g >> 1);
 606       if (gg > g) gg = 0;
 607       b = *(pb + wh);
 608       bb = (b >> 2) + (b >> 1);
 609       if (bb > b) bb = 0;
 610
 611       *((pr++) + wh) = rr;
 612       *((pg++) + wh) = gg;
 613       *((pb++) + wh) = bb;
 614     }
 615
 616     r = *pr;
 617     rr = r + (r >> 1);
 618     if (rr < r) rr = ~0;
 619     g = *pg;
 620     gg = g + (g >> 1);
 621     if (gg < g) gg = ~0;
 622     b = *pb;
 623     bb = b + (b >> 1);
 624     if (bb < b) bb = ~0;
 625
 626     *pr = rr;
 627     *pg = gg;
 628     *pb = bb;
 629
 630     r = *(pr + wh);
 631     rr = (r >> 2) + (r >> 1);
 632     if (rr > r) rr = 0;
 633     g = *(pg + wh);
 634     gg = (g >> 2) + (g >> 1);
 635     if (gg > g) gg = 0;
 636     b = *(pb + wh);
 637     bb = (b >> 2) + (b >> 1);
 638     if (bb > b) bb = 0;
 639
 640     *(pr + wh) = rr;
 641     *(pg + wh) = gg;
 642     *(pb + wh) = bb;
 643
 644     pr = red + width;
 645     pg = green + width;
 646     pb = blue + width;
 647
 648     while (--h) {
 649       r = *pr;
 650       rr = r + (r >> 1);
 651       if (rr < r) rr = ~0;
 652       g = *pg;
 653       gg = g + (g >> 1);
 654       if (gg < g) gg = ~0;
 655       b = *pb;
 656       bb = b + (b >> 1);
 657       if (bb < b) bb = ~0;
 658
 659       *pr = rr;
 660       *pg = gg;
 661       *pb = bb;
 662
 663       pr += width - 1;
 664       pg += width - 1;
 665       pb += width - 1;
 666
 667       r = *pr;
 668       rr = (r >> 2) + (r >> 1);
 669       if (rr > r) rr = 0;
 670       g = *pg;
 671       gg = (g >> 2) + (g >> 1);
 672       if (gg > g) gg = 0;
 673       b = *pb;
 674       bb = (b >> 2) + (b >> 1);
 675       if (bb > b) bb = 0;
 676
 677       *(pr++) = rr;
 678       *(pg++) = gg;
 679       *(pb++) = bb;
 680     }
 681
 682     r = *pr;
 683     rr = r + (r >> 1);
 684     if (rr < r) rr = ~0;
 685     g = *pg;
 686     gg = g + (g >> 1);
 687     if (gg < g) gg = ~0;
 688     b = *pb;
 689     bb = b + (b >> 1);
 690     if (bb < b) bb = ~0;
 691
 692     *pr = rr;
 693     *pg = gg;
 694     *pb = bb;
 695
 696     pr += width - 1;
 697     pg += width - 1;
 698     pb += width - 1;
 699
 700     r = *pr;
 701     rr = (r >> 2) + (r >> 1);
 702     if (rr > r) rr = 0;
 703     g = *pg;
 704     gg = (g >> 2) + (g >> 1);
 705     if (gg > g) gg = 0;
 706     b = *pb;
 707     bb = (b >> 2) + (b >> 1);
 708     if (bb > b) bb = 0;
 709
 710     *pr = rr;
 711     *pg = gg;
 712     *pb = bb;
 713   }
 714 }
 715
 716
 717 void BImage::bevel2(void) {
 718   if (width > 4 && height > 4) {
 719     unsigned char r, g, b, rr ,gg ,bb, *pr = red + width + 1,
 720       *pg = green + width + 1, *pb = blue + width + 1;
 721     unsigned int w = width - 2, h = height - 1, wh = width * (height - 3);
 722
 723     while (--w) {
 724       r = *pr;
 725       rr = r + (r >> 1);
 726       if (rr < r) rr = ~0;
 727       g = *pg;
 728       gg = g + (g >> 1);
 729       if (gg < g) gg = ~0;
 730       b = *pb;
 731       bb = b + (b >> 1);
 732       if (bb < b) bb = ~0;
 733
 734       *pr = rr;
 735       *pg = gg;
 736       *pb = bb;
 737
 738       r = *(pr + wh);
 739       rr = (r >> 2) + (r >> 1);
 740       if (rr > r) rr = 0;
 741       g = *(pg + wh);
 742       gg = (g >> 2) + (g >> 1);
 743       if (gg > g) gg = 0;
 744       b = *(pb + wh);
 745       bb = (b >> 2) + (b >> 1);
 746       if (bb > b) bb = 0;
 747
 748       *((pr++) + wh) = rr;
 749       *((pg++) + wh) = gg;
 750       *((pb++) + wh) = bb;
 751     }
 752
 753     pr = red + width;
 754     pg = green + width;
 755     pb = blue + width;
 756
 757     while (--h) {
 758       r = *pr;
 759       rr = r + (r >> 1);
 760       if (rr < r) rr = ~0;
 761       g = *pg;
 762       gg = g + (g >> 1);
 763       if (gg < g) gg = ~0;
 764       b = *pb;
 765       bb = b + (b >> 1);
 766       if (bb < b) bb = ~0;
 767
 768       *(++pr) = rr;
 769       *(++pg) = gg;
 770       *(++pb) = bb;
 771
 772       pr += width - 3;
 773       pg += width - 3;
 774       pb += width - 3;
 775
 776       r = *pr;
 777       rr = (r >> 2) + (r >> 1);
 778       if (rr > r) rr = 0;
 779       g = *pg;
 780       gg = (g >> 2) + (g >> 1);
 781       if (gg > g) gg = 0;
 782       b = *pb;
 783       bb = (b >> 2) + (b >> 1);
 784       if (bb > b) bb = 0;
 785
 786       *(pr++) = rr;
 787       *(pg++) = gg;
 788       *(pb++) = bb;
 789
 790       pr++; pg++; pb++;
 791     }
 792   }
 793 }
 794
 795
 796 void BImage::border(const BTexture &texture) {
 797   if (width < 2 || height < 2) return;
 798
 799   register unsigned int i;
 800   int r = texture.borderColor().red(),
 801     g = texture.borderColor().green(),
 802     b = texture.borderColor().blue();
 803
 804   unsigned char *pr, *pg, *pb;
 805
 806   // top line
 807   pr = red;
 808   pg = green;
 809   pb = blue;
 810   for (i = 0; i < width; ++i) {
 811     *pr++ = r;
 812     *pg++ = g;
 813     *pb++ = b;
 814   }
 815
 816   if (height > 2) {
 817     // left and right lines (pr,pg,pb are already lined up)
 818     for (i = 1; i < height - 1; ++i) {
 819       *pr = r;
 820       *pg = g;
 821       *pb = b;
 822       pr += width - 1;
 823       pg += width - 1;
 824       pb += width - 1;
 825       *pr++ = r;
 826       *pg++ = g;
 827       *pb++ = b;
 828     }
 829   }
 830
 831   // bottom line (pr,pg,pb are already lined up)
 832   for (i = 0; i < width; ++i) {
 833     *pr++ = r;
 834     *pg++ = g;
 835     *pb++ = b;
 836   }
 837 }
 838
 839
 840 void BImage::invert(void) {
 841   register unsigned int i, j, wh = (width * height) - 1;
 842   unsigned char tmp;
 843
 844   for (i = 0, j = wh; j > i; j--, i++) {
 845     tmp = *(red + j);
 846     *(red + j) = *(red + i);
 847     *(red + i) = tmp;
 848
 849     tmp = *(green + j);
 850     *(green + j) = *(green + i);
 851     *(green + i) = tmp;
 852
 853     tmp = *(blue + j);
 854     *(blue + j) = *(blue + i);
 855     *(blue + i) = tmp;
 856   }
 857 }
 858
 859
 860 void BImage::dgradient(void) {
 861   // diagonal gradient code was written by Mike Cole <mike@mydot.com>
 862   // modified for interlacing by Brad Hughes
 863
 864   float drx, dgx, dbx, dry, dgy, dby, yr = 0.0, yg = 0.0, yb = 0.0,
 865     xr = (float) from.red(),
 866     xg = (float) from.green(),
 867     xb = (float) from.blue();
 868   unsigned char *pr = red, *pg = green, *pb = blue;
 869   unsigned int w = width * 2, h = height * 2, *xt = xtable, *yt = ytable;
 870
 871   register unsigned int x, y;
 872
 873   dry = drx = (float) (to.red() - from.red());
 874   dgy = dgx = (float) (to.green() - from.green());
 875   dby = dbx = (float) (to.blue() - from.blue());
 876
 877   // Create X table
 878   drx /= w;
 879   dgx /= w;
 880   dbx /= w;
 881
 882   for (x = 0; x < width; x++) {
 883     *(xt++) = (unsigned char) (xr);
 884     *(xt++) = (unsigned char) (xg);
 885     *(xt++) = (unsigned char) (xb);
 886
 887     xr += drx;
 888     xg += dgx;
 889     xb += dbx;
 890   }
 891
 892   // Create Y table
 893   dry /= h;
 894   dgy /= h;
 895   dby /= h;
 896
 897   for (y = 0; y < height; y++) {
 898     *(yt++) = ((unsigned char) yr);
 899     *(yt++) = ((unsigned char) yg);
 900     *(yt++) = ((unsigned char) yb);
 901
 902     yr += dry;
 903     yg += dgy;
 904     yb += dby;
 905   }
 906
 907   // Combine tables to create gradient
 908
 909   if (! interlaced) {
 910     // normal dgradient
 911     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
 912       for (xt = xtable, x = 0; x < width; x++) {
 913         *(pr++) = *(xt++) + *(yt);
 914         *(pg++) = *(xt++) + *(yt + 1);
 915         *(pb++) = *(xt++) + *(yt + 2);
 916       }
 917     }
 918   } else {
 919     // faked interlacing effect
 920     unsigned char channel, channel2;
 921
 922     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
 923       for (xt = xtable, x = 0; x < width; x++) {
 924         if (y & 1) {
 925           channel = *(xt++) + *(yt);
 926           channel2 = (channel >> 1) + (channel >> 2);
 927           if (channel2 > channel) channel2 = 0;
 928           *(pr++) = channel2;
 929
 930           channel = *(xt++) + *(yt + 1);
 931           channel2 = (channel >> 1) + (channel >> 2);
 932           if (channel2 > channel) channel2 = 0;
 933           *(pg++) = channel2;
 934
 935           channel = *(xt++) + *(yt + 2);
 936           channel2 = (channel >> 1) + (channel >> 2);
 937           if (channel2 > channel) channel2 = 0;
 938           *(pb++) = channel2;
 939         } else {
 940           channel = *(xt++) + *(yt);
 941           channel2 = channel + (channel >> 3);
 942           if (channel2 < channel) channel2 = ~0;
 943           *(pr++) = channel2;
 944
 945           channel = *(xt++) + *(yt + 1);
 946           channel2 = channel + (channel >> 3);
 947           if (channel2 < channel) channel2 = ~0;
 948           *(pg++) = channel2;
 949
 950           channel = *(xt++) + *(yt + 2);
 951           channel2 = channel + (channel >> 3);
 952           if (channel2 < channel) channel2 = ~0;
 953           *(pb++) = channel2;
 954         }
 955       }
 956     }
 957   }
 958 }
 959
 960
 961 void BImage::hgradient(void) {
 962   float drx, dgx, dbx,
 963     xr = (float) from.red(),
 964     xg = (float) from.green(),
 965     xb = (float) from.blue();
 966   unsigned char *pr = red, *pg = green, *pb = blue;
 967
 968   register unsigned int x, y;
 969
 970   drx = (float) (to.red() - from.red());
 971   dgx = (float) (to.green() - from.green());
 972   dbx = (float) (to.blue() - from.blue());
 973
 974   drx /= width;
 975   dgx /= width;
 976   dbx /= width;
 977
 978   if (interlaced && height > 2) {
 979     // faked interlacing effect
 980     unsigned char channel, channel2;
 981
 982     for (x = 0; x < width; x++, pr++, pg++, pb++) {
 983       channel = (unsigned char) xr;
 984       channel2 = (channel >> 1) + (channel >> 2);
 985       if (channel2 > channel) channel2 = 0;
 986       *pr = channel2;
 987
 988       channel = (unsigned char) xg;
 989       channel2 = (channel >> 1) + (channel >> 2);
 990       if (channel2 > channel) channel2 = 0;
 991       *pg = channel2;
 992
 993       channel = (unsigned char) xb;
 994       channel2 = (channel >> 1) + (channel >> 2);
 995       if (channel2 > channel) channel2 = 0;
 996       *pb = channel2;
 997
 998
 999       channel = (unsigned char) xr;
1000       channel2 = channel + (channel >> 3);
1001       if (channel2 < channel) channel2 = ~0;
1002       *(pr + width) = channel2;
1003
1004       channel = (unsigned char) xg;
1005       channel2 = channel + (channel >> 3);
1006       if (channel2 < channel) channel2 = ~0;
1007       *(pg + width) = channel2;
1008
1009       channel = (unsigned char) xb;
1010       channel2 = channel + (channel >> 3);
1011       if (channel2 < channel) channel2 = ~0;
1012       *(pb + width) = channel2;
1013
1014       xr += drx;
1015       xg += dgx;
1016       xb += dbx;
1017     }
1018
1019     pr += width;
1020     pg += width;
1021     pb += width;
1022
1023     int offset;
1024
1025     for (y = 2; y < height; y++, pr += width, pg += width, pb += width) {
1026       if (y & 1) offset = width; else offset = 0;
1027
1028       memcpy(pr, (red + offset), width);
1029       memcpy(pg, (green + offset), width);
1030       memcpy(pb, (blue + offset), width);
1031     }
1032   } else {
1033     // normal hgradient
1034     for (x = 0; x < width; x++) {
1035       *(pr++) = (unsigned char) (xr);
1036       *(pg++) = (unsigned char) (xg);
1037       *(pb++) = (unsigned char) (xb);
1038
1039       xr += drx;
1040       xg += dgx;
1041       xb += dbx;
1042     }
1043
1044     for (y = 1; y < height; y++, pr += width, pg += width, pb += width) {
1045       memcpy(pr, red, width);
1046       memcpy(pg, green, width);
1047       memcpy(pb, blue, width);
1048     }
1049   }
1050 }
1051
1052
1053 void BImage::vgradient(void) {
1054   float dry, dgy, dby,
1055     yr = (float) from.red(),
1056     yg = (float) from.green(),
1057     yb = (float) from.blue();
1058   unsigned char *pr = red, *pg = green, *pb = blue;
1059
1060   register unsigned int y;
1061
1062   dry = (float) (to.red() - from.red());
1063   dgy = (float) (to.green() - from.green());
1064   dby = (float) (to.blue() - from.blue());
1065
1066   dry /= height;
1067   dgy /= height;
1068   dby /= height;
1069
1070   if (interlaced) {
1071     // faked interlacing effect
1072     unsigned char channel, channel2;
1073
1074     for (y = 0; y < height; y++, pr += width, pg += width, pb += width) {
1075       if (y & 1) {
1076         channel = (unsigned char) yr;
1077         channel2 = (channel >> 1) + (channel >> 2);
1078         if (channel2 > channel) channel2 = 0;
1079         memset(pr, channel2, width);
1080
1081         channel = (unsigned char) yg;
1082         channel2 = (channel >> 1) + (channel >> 2);
1083         if (channel2 > channel) channel2 = 0;
1084         memset(pg, channel2, width);
1085
1086         channel = (unsigned char) yb;
1087         channel2 = (channel >> 1) + (channel >> 2);
1088         if (channel2 > channel) channel2 = 0;
1089         memset(pb, channel2, width);
1090       } else {
1091         channel = (unsigned char) yr;
1092         channel2 = channel + (channel >> 3);
1093         if (channel2 < channel) channel2 = ~0;
1094         memset(pr, channel2, width);
1095
1096         channel = (unsigned char) yg;
1097         channel2 = channel + (channel >> 3);
1098         if (channel2 < channel) channel2 = ~0;
1099         memset(pg, channel2, width);
1100
1101         channel = (unsigned char) yb;
1102         channel2 = channel + (channel >> 3);
1103         if (channel2 < channel) channel2 = ~0;
1104         memset(pb, channel2, width);
1105       }
1106
1107       yr += dry;
1108       yg += dgy;
1109       yb += dby;
1110     }
1111   } else {
1112     // normal vgradient
1113     for (y = 0; y < height; y++, pr += width, pg += width, pb += width) {
1114       memset(pr, (unsigned char) yr, width);
1115       memset(pg, (unsigned char) yg, width);
1116       memset(pb, (unsigned char) yb, width);
1117
1118       yr += dry;
1119       yg += dgy;
1120       yb += dby;
1121     }
1122   }
1123 }
1124
1125
1126 void BImage::pgradient(void) {
1127   // pyramid gradient -  based on original dgradient, written by
1128   // Mosfet (mosfet@kde.org)
1129   // adapted from kde sources for Blackbox by Brad Hughes
1130
1131   float yr, yg, yb, drx, dgx, dbx, dry, dgy, dby,
1132     xr, xg, xb;
1133   int rsign, gsign, bsign;
1134   unsigned char *pr = red, *pg = green, *pb = blue;
1135   unsigned int tr = to.red(), tg = to.green(), tb = to.blue(),
1136     *xt = xtable, *yt = ytable;
1137
1138   register unsigned int x, y;
1139
1140   dry = drx = (float) (to.red() - from.red());
1141   dgy = dgx = (float) (to.green() - from.green());
1142   dby = dbx = (float) (to.blue() - from.blue());
1143
1144   rsign = (drx < 0) ? -1 : 1;
1145   gsign = (dgx < 0) ? -1 : 1;
1146   bsign = (dbx < 0) ? -1 : 1;
1147
1148   xr = yr = (drx / 2);
1149   xg = yg = (dgx / 2);
1150   xb = yb = (dbx / 2);
1151
1152   // Create X table
1153   drx /= width;
1154   dgx /= width;
1155   dbx /= width;
1156
1157   for (x = 0; x < width; x++) {
1158     *(xt++) = (unsigned char) ((xr < 0) ? -xr : xr);
1159     *(xt++) = (unsigned char) ((xg < 0) ? -xg : xg);
1160     *(xt++) = (unsigned char) ((xb < 0) ? -xb : xb);
1161
1162     xr -= drx;
1163     xg -= dgx;
1164     xb -= dbx;
1165   }
1166
1167   // Create Y table
1168   dry /= height;
1169   dgy /= height;
1170   dby /= height;
1171
1172   for (y = 0; y < height; y++) {
1173     *(yt++) = ((unsigned char) ((yr < 0) ? -yr : yr));
1174     *(yt++) = ((unsigned char) ((yg < 0) ? -yg : yg));
1175     *(yt++) = ((unsigned char) ((yb < 0) ? -yb : yb));
1176
1177     yr -= dry;
1178     yg -= dgy;
1179     yb -= dby;
1180   }
1181
1182   // Combine tables to create gradient
1183
1184   if (! interlaced) {
1185     // normal pgradient
1186     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
1187       for (xt = xtable, x = 0; x < width; x++) {
1188         *(pr++) = (unsigned char) (tr - (rsign * (*(xt++) + *(yt))));
1189         *(pg++) = (unsigned char) (tg - (gsign * (*(xt++) + *(yt + 1))));
1190         *(pb++) = (unsigned char) (tb - (bsign * (*(xt++) + *(yt + 2))));
1191       }
1192     }
1193   } else {
1194     // faked interlacing effect
1195     unsigned char channel, channel2;
1196
1197     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
1198       for (xt = xtable, x = 0; x < width; x++) {
1199         if (y & 1) {
1200           channel = (unsigned char) (tr - (rsign * (*(xt++) + *(yt))));
1201           channel2 = (channel >> 1) + (channel >> 2);
1202           if (channel2 > channel) channel2 = 0;
1203           *(pr++) = channel2;
1204
1205           channel = (unsigned char) (tg - (gsign * (*(xt++) + *(yt + 1))));
1206           channel2 = (channel >> 1) + (channel >> 2);
1207           if (channel2 > channel) channel2 = 0;
1208           *(pg++) = channel2;
1209
1210           channel = (unsigned char) (tb - (bsign * (*(xt++) + *(yt + 2))));
1211           channel2 = (channel >> 1) + (channel >> 2);
1212           if (channel2 > channel) channel2 = 0;
1213           *(pb++) = channel2;
1214         } else {
1215           channel = (unsigned char) (tr - (rsign * (*(xt++) + *(yt))));
1216           channel2 = channel + (channel >> 3);
1217           if (channel2 < channel) channel2 = ~0;
1218           *(pr++) = channel2;
1219
1220           channel = (unsigned char) (tg - (gsign * (*(xt++) + *(yt + 1))));
1221           channel2 = channel + (channel >> 3);
1222           if (channel2 < channel) channel2 = ~0;
1223           *(pg++) = channel2;
1224
1225           channel = (unsigned char) (tb - (bsign * (*(xt++) + *(yt + 2))));
1226           channel2 = channel + (channel >> 3);
1227           if (channel2 < channel) channel2 = ~0;
1228           *(pb++) = channel2;
1229         }
1230       }
1231     }
1232   }
1233 }
1234
1235
1236 void BImage::rgradient(void) {
1237   // rectangle gradient -  based on original dgradient, written by
1238   // Mosfet (mosfet@kde.org)
1239   // adapted from kde sources for Blackbox by Brad Hughes
1240
1241   float drx, dgx, dbx, dry, dgy, dby, xr, xg, xb, yr, yg, yb;
1242   int rsign, gsign, bsign;
1243   unsigned char *pr = red, *pg = green, *pb = blue;
1244   unsigned int tr = to.red(), tg = to.green(), tb = to.blue(),
1245     *xt = xtable, *yt = ytable;
1246
1247   register unsigned int x, y;
1248
1249   dry = drx = (float) (to.red() - from.red());
1250   dgy = dgx = (float) (to.green() - from.green());
1251   dby = dbx = (float) (to.blue() - from.blue());
1252
1253   rsign = (drx < 0) ? -2 : 2;
1254   gsign = (dgx < 0) ? -2 : 2;
1255   bsign = (dbx < 0) ? -2 : 2;
1256
1257   xr = yr = (drx / 2);
1258   xg = yg = (dgx / 2);
1259   xb = yb = (dbx / 2);
1260
1261   // Create X table
1262   drx /= width;
1263   dgx /= width;
1264   dbx /= width;
1265
1266   for (x = 0; x < width; x++) {
1267     *(xt++) = (unsigned char) ((xr < 0) ? -xr : xr);
1268     *(xt++) = (unsigned char) ((xg < 0) ? -xg : xg);
1269     *(xt++) = (unsigned char) ((xb < 0) ? -xb : xb);
1270
1271     xr -= drx;
1272     xg -= dgx;
1273     xb -= dbx;
1274   }
1275
1276   // Create Y table
1277   dry /= height;
1278   dgy /= height;
1279   dby /= height;
1280
1281   for (y = 0; y < height; y++) {
1282     *(yt++) = ((unsigned char) ((yr < 0) ? -yr : yr));
1283     *(yt++) = ((unsigned char) ((yg < 0) ? -yg : yg));
1284     *(yt++) = ((unsigned char) ((yb < 0) ? -yb : yb));
1285
1286     yr -= dry;
1287     yg -= dgy;
1288     yb -= dby;
1289   }
1290
1291   // Combine tables to create gradient
1292
1293   if (! interlaced) {
1294     // normal rgradient
1295     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
1296       for (xt = xtable, x = 0; x < width; x++) {
1297         *(pr++) = (unsigned char) (tr - (rsign * max(*(xt++), *(yt))));
1298         *(pg++) = (unsigned char) (tg - (gsign * max(*(xt++), *(yt + 1))));
1299         *(pb++) = (unsigned char) (tb - (bsign * max(*(xt++), *(yt + 2))));
1300       }
1301     }
1302   } else {
1303     // faked interlacing effect
1304     unsigned char channel, channel2;
1305
1306     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
1307       for (xt = xtable, x = 0; x < width; x++) {
1308         if (y & 1) {
1309           channel = (unsigned char) (tr - (rsign * max(*(xt++), *(yt))));
1310           channel2 = (channel >> 1) + (channel >> 2);
1311           if (channel2 > channel) channel2 = 0;
1312           *(pr++) = channel2;
1313
1314           channel = (unsigned char) (tg - (gsign * max(*(xt++), *(yt + 1))));
1315           channel2 = (channel >> 1) + (channel >> 2);
1316           if (channel2 > channel) channel2 = 0;
1317           *(pg++) = channel2;
1318
1319           channel = (unsigned char) (tb - (bsign * max(*(xt++), *(yt + 2))));
1320           channel2 = (channel >> 1) + (channel >> 2);
1321           if (channel2 > channel) channel2 = 0;
1322           *(pb++) = channel2;
1323         } else {
1324           channel = (unsigned char) (tr - (rsign * max(*(xt++), *(yt))));
1325           channel2 = channel + (channel >> 3);
1326           if (channel2 < channel) channel2 = ~0;
1327           *(pr++) = channel2;
1328
1329           channel = (unsigned char) (tg - (gsign * max(*(xt++), *(yt + 1))));
1330           channel2 = channel + (channel >> 3);
1331           if (channel2 < channel) channel2 = ~0;
1332           *(pg++) = channel2;
1333
1334           channel = (unsigned char) (tb - (bsign * max(*(xt++), *(yt + 2))));
1335           channel2 = channel + (channel >> 3);
1336           if (channel2 < channel) channel2 = ~0;
1337           *(pb++) = channel2;
1338         }
1339       }
1340     }
1341   }
1342 }
1343
1344
1345 void BImage::egradient(void) {
1346   // elliptic gradient -  based on original dgradient, written by
1347   // Mosfet (mosfet@kde.org)
1348   // adapted from kde sources for Blackbox by Brad Hughes
1349
1350   float drx, dgx, dbx, dry, dgy, dby, yr, yg, yb, xr, xg, xb;
1351   int rsign, gsign, bsign;
1352   unsigned char *pr = red, *pg = green, *pb = blue;
1353   unsigned int *xt = xtable, *yt = ytable,
1354     tr = (unsigned long) to.red(),
1355     tg = (unsigned long) to.green(),
1356     tb = (unsigned long) to.blue();
1357
1358   register unsigned int x, y;
1359
1360   dry = drx = (float) (to.red() - from.red());
1361   dgy = dgx = (float) (to.green() - from.green());
1362   dby = dbx = (float) (to.blue() - from.blue());
1363
1364   rsign = (drx < 0) ? -1 : 1;
1365   gsign = (dgx < 0) ? -1 : 1;
1366   bsign = (dbx < 0) ? -1 : 1;
1367
1368   xr = yr = (drx / 2);
1369   xg = yg = (dgx / 2);
1370   xb = yb = (dbx / 2);
1371
1372   // Create X table
1373   drx /= width;
1374   dgx /= width;
1375   dbx /= width;
1376
1377   for (x = 0; x < width; x++) {
1378     *(xt++) = (unsigned long) (xr * xr);
1379     *(xt++) = (unsigned long) (xg * xg);
1380     *(xt++) = (unsigned long) (xb * xb);
1381
1382     xr -= drx;
1383     xg -= dgx;
1384     xb -= dbx;
1385   }
1386
1387   // Create Y table
1388   dry /= height;
1389   dgy /= height;
1390   dby /= height;
1391
1392   for (y = 0; y < height; y++) {
1393     *(yt++) = (unsigned long) (yr * yr);
1394     *(yt++) = (unsigned long) (yg * yg);
1395     *(yt++) = (unsigned long) (yb * yb);
1396
1397     yr -= dry;
1398     yg -= dgy;
1399     yb -= dby;
1400   }
1401
1402   // Combine tables to create gradient
1403
1404   if (! interlaced) {
1405     // normal egradient
1406     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
1407       for (xt = xtable, x = 0; x < width; x++) {
1408         *(pr++) = (unsigned char)
1409           (tr - (rsign * control->getSqrt(*(xt++) + *(yt))));
1410         *(pg++) = (unsigned char)
1411           (tg - (gsign * control->getSqrt(*(xt++) + *(yt + 1))));
1412         *(pb++) = (unsigned char)
1413           (tb - (bsign * control->getSqrt(*(xt++) + *(yt + 2))));
1414       }
1415     }
1416   } else {
1417     // faked interlacing effect
1418     unsigned char channel, channel2;
1419
1420     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
1421       for (xt = xtable, x = 0; x < width; x++) {
1422         if (y & 1) {
1423           channel = (unsigned char)
1424             (tr - (rsign * control->getSqrt(*(xt++) + *(yt))));
1425           channel2 = (channel >> 1) + (channel >> 2);
1426           if (channel2 > channel) channel2 = 0;
1427           *(pr++) = channel2;
1428
1429           channel = (unsigned char)
1430             (tg - (gsign * control->getSqrt(*(xt++) + *(yt + 1))));
1431           channel2 = (channel >> 1) + (channel >> 2);
1432           if (channel2 > channel) channel2 = 0;
1433           *(pg++) = channel2;
1434
1435           channel = (unsigned char)
1436             (tb - (bsign * control->getSqrt(*(xt++) + *(yt + 2))));
1437           channel2 = (channel >> 1) + (channel >> 2);
1438           if (channel2 > channel) channel2 = 0;
1439           *(pb++) = channel2;
1440         } else {
1441           channel = (unsigned char)
1442             (tr - (rsign * control->getSqrt(*(xt++) + *(yt))));
1443           channel2 = channel + (channel >> 3);
1444           if (channel2 < channel) channel2 = ~0;
1445           *(pr++) = channel2;
1446
1447           channel = (unsigned char)
1448           (tg - (gsign * control->getSqrt(*(xt++) + *(yt + 1))));
1449           channel2 = channel + (channel >> 3);
1450           if (channel2 < channel) channel2 = ~0;
1451           *(pg++) = channel2;
1452
1453           channel = (unsigned char)
1454             (tb - (bsign * control->getSqrt(*(xt++) + *(yt + 2))));
1455           channel2 = channel + (channel >> 3);
1456           if (channel2 < channel) channel2 = ~0;
1457           *(pb++) = channel2;
1458         }
1459       }
1460     }
1461   }
1462 }
1463
1464
1465 void BImage::pcgradient(void) {
1466   // pipe cross gradient -  based on original dgradient, written by
1467   // Mosfet (mosfet@kde.org)
1468   // adapted from kde sources for Blackbox by Brad Hughes
1469
1470   float drx, dgx, dbx, dry, dgy, dby, xr, xg, xb, yr, yg, yb;
1471   int rsign, gsign, bsign;
1472   unsigned char *pr = red, *pg = green, *pb = blue;
1473   unsigned int *xt = xtable, *yt = ytable,
1474     tr = to.red(),
1475     tg = to.green(),
1476     tb = to.blue();
1477
1478   register unsigned int x, y;
1479
1480   dry = drx = (float) (to.red() - from.red());
1481   dgy = dgx = (float) (to.green() - from.green());
1482   dby = dbx = (float) (to.blue() - from.blue());
1483
1484   rsign = (drx < 0) ? -2 : 2;
1485   gsign = (dgx < 0) ? -2 : 2;
1486   bsign = (dbx < 0) ? -2 : 2;
1487
1488   xr = yr = (drx / 2);
1489   xg = yg = (dgx / 2);
1490   xb = yb = (dbx / 2);
1491
1492   // Create X table
1493   drx /= width;
1494   dgx /= width;
1495   dbx /= width;
1496
1497   for (x = 0; x < width; x++) {
1498     *(xt++) = (unsigned char) ((xr < 0) ? -xr : xr);
1499     *(xt++) = (unsigned char) ((xg < 0) ? -xg : xg);
1500     *(xt++) = (unsigned char) ((xb < 0) ? -xb : xb);
1501
1502     xr -= drx;
1503     xg -= dgx;
1504     xb -= dbx;
1505   }
1506
1507   // Create Y table
1508   dry /= height;
1509   dgy /= height;
1510   dby /= height;
1511
1512   for (y = 0; y < height; y++) {
1513     *(yt++) = ((unsigned char) ((yr < 0) ? -yr : yr));
1514     *(yt++) = ((unsigned char) ((yg < 0) ? -yg : yg));
1515     *(yt++) = ((unsigned char) ((yb < 0) ? -yb : yb));
1516
1517     yr -= dry;
1518     yg -= dgy;
1519     yb -= dby;
1520   }
1521
1522   // Combine tables to create gradient
1523
1524   if (! interlaced) {
1525     // normal pcgradient
1526     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
1527       for (xt = xtable, x = 0; x < width; x++) {
1528         *(pr++) = (unsigned char) (tr - (rsign * min(*(xt++), *(yt))));
1529         *(pg++) = (unsigned char) (tg - (gsign * min(*(xt++), *(yt + 1))));
1530         *(pb++) = (unsigned char) (tb - (bsign * min(*(xt++), *(yt + 2))));
1531       }
1532     }
1533   } else {
1534     // faked interlacing effect
1535     unsigned char channel, channel2;
1536
1537     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
1538       for (xt = xtable, x = 0; x < width; x++) {
1539         if (y & 1) {
1540           channel = (unsigned char) (tr - (rsign * min(*(xt++), *(yt))));
1541           channel2 = (channel >> 1) + (channel >> 2);
1542           if (channel2 > channel) channel2 = 0;
1543           *(pr++) = channel2;
1544
1545           channel = (unsigned char) (tg - (bsign * min(*(xt++), *(yt + 1))));
1546           channel2 = (channel >> 1) + (channel >> 2);
1547           if (channel2 > channel) channel2 = 0;
1548           *(pg++) = channel2;
1549
1550           channel = (unsigned char) (tb - (gsign * min(*(xt++), *(yt + 2))));
1551           channel2 = (channel >> 1) + (channel >> 2);
1552           if (channel2 > channel) channel2 = 0;
1553           *(pb++) = channel2;
1554         } else {
1555           channel = (unsigned char) (tr - (rsign * min(*(xt++), *(yt))));
1556           channel2 = channel + (channel >> 3);
1557           if (channel2 < channel) channel2 = ~0;
1558           *(pr++) = channel2;
1559
1560           channel = (unsigned char) (tg - (gsign * min(*(xt++), *(yt + 1))));
1561           channel2 = channel + (channel >> 3);
1562           if (channel2 < channel) channel2 = ~0;
1563           *(pg++) = channel2;
1564
1565           channel = (unsigned char) (tb - (bsign * min(*(xt++), *(yt + 2))));
1566           channel2 = channel + (channel >> 3);
1567           if (channel2 < channel) channel2 = ~0;
1568           *(pb++) = channel2;
1569         }
1570       }
1571     }
1572   }
1573 }
1574
1575
1576 void BImage::cdgradient(void) {
1577   // cross diagonal gradient -  based on original dgradient, written by
1578   // Mosfet (mosfet@kde.org)
1579   // adapted from kde sources for Blackbox by Brad Hughes
1580
1581   float drx, dgx, dbx, dry, dgy, dby, yr = 0.0, yg = 0.0, yb = 0.0,
1582     xr = (float) from.red(),
1583     xg = (float) from.green(),
1584     xb = (float) from.blue();
1585   unsigned char *pr = red, *pg = green, *pb = blue;
1586   unsigned int w = width * 2, h = height * 2, *xt, *yt;
1587
1588   register unsigned int x, y;
1589
1590   dry = drx = (float) (to.red() - from.red());
1591   dgy = dgx = (float) (to.green() - from.green());
1592   dby = dbx = (float) (to.blue() - from.blue());
1593
1594   // Create X table
1595   drx /= w;
1596   dgx /= w;
1597   dbx /= w;
1598
1599   for (xt = (xtable + (width * 3) - 1), x = 0; x < width; x++) {
1600     *(xt--) = (unsigned char) xb;
1601     *(xt--) = (unsigned char) xg;
1602     *(xt--) = (unsigned char) xr;
1603
1604     xr += drx;
1605     xg += dgx;
1606     xb += dbx;
1607   }
1608
1609   // Create Y table
1610   dry /= h;
1611   dgy /= h;
1612   dby /= h;
1613
1614   for (yt = ytable, y = 0; y < height; y++) {
1615     *(yt++) = (unsigned char) yr;
1616     *(yt++) = (unsigned char) yg;
1617     *(yt++) = (unsigned char) yb;
1618
1619     yr += dry;
1620     yg += dgy;
1621     yb += dby;
1622   }
1623
1624   // Combine tables to create gradient
1625
1626   if (! interlaced) {
1627     // normal cdgradient
1628     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
1629       for (xt = xtable, x = 0; x < width; x++) {
1630         *(pr++) = *(xt++) + *(yt);
1631         *(pg++) = *(xt++) + *(yt + 1);
1632         *(pb++) = *(xt++) + *(yt + 2);
1633       }
1634     }
1635   } else {
1636     // faked interlacing effect
1637     unsigned char channel, channel2;
1638
1639     for (yt = ytable, y = 0; y < height; y++, yt += 3) {
1640       for (xt = xtable, x = 0; x < width; x++) {
1641         if (y & 1) {
1642           channel = *(xt++) + *(yt);
1643           channel2 = (channel >> 1) + (channel >> 2);
1644           if (channel2 > channel) channel2 = 0;
1645           *(pr++) = channel2;
1646
1647           channel = *(xt++) + *(yt + 1);
1648           channel2 = (channel >> 1) + (channel >> 2);
1649           if (channel2 > channel) channel2 = 0;
1650           *(pg++) = channel2;
1651
1652           channel = *(xt++) + *(yt + 2);
1653           channel2 = (channel >> 1) + (channel >> 2);
1654           if (channel2 > channel) channel2 = 0;
1655           *(pb++) = channel2;
1656         } else {
1657           channel = *(xt++) + *(yt);
1658           channel2 = channel + (channel >> 3);
1659           if (channel2 < channel) channel2 = ~0;
1660           *(pr++) = channel2;
1661
1662           channel = *(xt++) + *(yt + 1);
1663           channel2 = channel + (channel >> 3);
1664           if (channel2 < channel) channel2 = ~0;
1665           *(pg++) = channel2;
1666
1667           channel = *(xt++) + *(yt + 2);
1668           channel2 = channel + (channel >> 3);
1669           if (channel2 < channel) channel2 = ~0;
1670           *(pb++) = channel2;
1671         }
1672       }
1673     }
1674   }
1675 }
1676
1677 }