src/xpm/scan.c

   1 /*
   2  * Copyright (C) 1989-95 GROUPE BULL
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to
   6  * deal in the Software without restriction, including without limitation the
   7  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   8  * sell copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  * Except as contained in this notice, the name of GROUPE BULL shall not be
  22  * used in advertising or otherwise to promote the sale, use or other dealings
  23  * in this Software without prior written authorization from GROUPE BULL.
  24  */
  25
  26 /*****************************************************************************\
  27 * scan.c:                                                                     *
  28 *                                                                             *
  29 *  XPM library                                                                *
  30 *  Scanning utility for XPM file format                                       *
  31 *                                                                             *
  32 *  Developed by Arnaud Le Hors                                                *
  33 \*****************************************************************************/
  34
  35 /*
  36  * The code related to FOR_MSW has been added by
  37  * HeDu (hedu@cul-ipn.uni-kiel.de) 4/94
  38  */
  39
  40 /*
  41  * The code related to AMIGA has been added by
  42  * Lorens Younes (d93-hyo@nada.kth.se) 4/96
  43  */
  44
  45 #include "XpmI.h"
  46
  47 #define MAXPRINTABLE 92                 /* number of printable ascii chars
  48                                          * minus \ and " for string compat
  49                                          * and ? to avoid ANSI trigraphs. */
  50
  51 static char *printable =
  52 " .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjklzxcvbnmMNBVCZ\
  53 ASDFGHJKLPIUYTREWQ!~^/()_`'][{}|";
  54
  55 /*
  56  * printable begin with a space, so in most case, due to my algorithm, when
  57  * the number of different colors is less than MAXPRINTABLE, it will give a
  58  * char follow by "nothing" (a space) in the readable xpm file
  59  */
  60
  61
  62 typedef struct {
  63     Pixel *pixels;
  64     unsigned int *pixelindex;
  65     unsigned int size;
  66     unsigned int ncolors;
  67     unsigned int mask_pixel;            /* whether there is or not */
  68 }      PixelsMap;
  69
  70 LFUNC(storePixel, int, (Pixel pixel, PixelsMap *pmap,
  71                         unsigned int *index_return));
  72
  73 LFUNC(storeMaskPixel, int, (Pixel pixel, PixelsMap *pmap,
  74                             unsigned int *index_return));
  75
  76 #ifndef FOR_MSW
  77 # ifndef AMIGA
  78 LFUNC(GetImagePixels, int, (XImage *image, unsigned int width,
  79                             unsigned int height, PixelsMap *pmap));
  80
  81 LFUNC(GetImagePixels32, int, (XImage *image, unsigned int width,
  82                               unsigned int height, PixelsMap *pmap));
  83
  84 LFUNC(GetImagePixels16, int, (XImage *image, unsigned int width,
  85                               unsigned int height, PixelsMap *pmap));
  86
  87 LFUNC(GetImagePixels8, int, (XImage *image, unsigned int width,
  88                              unsigned int height, PixelsMap *pmap));
  89
  90 LFUNC(GetImagePixels1, int, (XImage *image, unsigned int width,
  91                              unsigned int height, PixelsMap *pmap,
  92                              int (*storeFunc) ()));
  93 # else /* AMIGA */
  94 LFUNC(AGetImagePixels, int, (XImage *image, unsigned int width,
  95                              unsigned int height, PixelsMap *pmap,
  96                              int (*storeFunc) ()));
  97 # endif/* AMIGA */
  98 #else  /* ndef FOR_MSW */
  99 LFUNC(MSWGetImagePixels, int, (Display *d, XImage *image, unsigned int width,
 100                                unsigned int height, PixelsMap *pmap,
 101                                int (*storeFunc) ()));
 102 #endif
 103 LFUNC(ScanTransparentColor, int, (XpmColor *color, unsigned int cpp,
 104                                   XpmAttributes *attributes));
 105
 106 LFUNC(ScanOtherColors, int, (Display *display, XpmColor *colors, int ncolors,
 107                              Pixel *pixels, unsigned int mask,
 108                              unsigned int cpp, XpmAttributes *attributes));
 109
 110 /*
 111  * This function stores the given pixel in the given arrays which are grown
 112  * if not large enough.
 113  */
 114 #ifdef __OS2__
 115 /* Visual Age cannot deal with old, non-ansi, code */
 116 static int storePixel(Pixel pixel, PixelsMap* pmap, unsigned int* index_return)
 117 #else
 118 static int
 119 storePixel(pixel, pmap, index_return)
 120     Pixel pixel;
 121     PixelsMap *pmap;
 122     unsigned int *index_return;
 123 #endif
 124 {
 125     unsigned int i;
 126     Pixel *p;
 127     unsigned int ncolors;
 128
 129     if (*index_return) {                /* this is a transparent pixel! */
 130         *index_return = 0;
 131         return 0;
 132     }
 133     ncolors = pmap->ncolors;
 134     p = pmap->pixels + pmap->mask_pixel;
 135     for (i = pmap->mask_pixel; i < ncolors; i++, p++)
 136         if (*p == pixel)
 137             break;
 138     if (i == ncolors) {
 139         if (ncolors >= pmap->size) {
 140             pmap->size *= 2;
 141             p = (Pixel *) XpmRealloc(pmap->pixels, sizeof(Pixel) * pmap->size);
 142             if (!p)
 143                 return (1);
 144             pmap->pixels = p;
 145
 146         }
 147         (pmap->pixels)[ncolors] = pixel;
 148         pmap->ncolors++;
 149     }
 150     *index_return = i;
 151     return 0;
 152 }
 153
 154 #ifdef __OS2__
 155 /* Visual Age cannot deal with old, non-ansi, code */
 156 static int storeMaskPixel(Pixel pixel, PixelsMap* pmap, unsigned int* index_return)
 157 #else
 158 static int
 159 storeMaskPixel(pixel, pmap, index_return)
 160     Pixel pixel;
 161     PixelsMap *pmap;
 162     unsigned int *index_return;
 163 #endif
 164 {
 165     if (!pixel) {
 166         if (!pmap->ncolors) {
 167             pmap->ncolors = 1;
 168             (pmap->pixels)[0] = 0;
 169             pmap->mask_pixel = 1;
 170         }
 171         *index_return = 1;
 172     } else
 173         *index_return = 0;
 174     return 0;
 175 }
 176
 177 /* function call in case of error */
 178 #undef RETURN
 179 #define RETURN(status) \
 180 { \
 181       ErrorStatus = status; \
 182       goto error; \
 183 }
 184
 185 /*
 186  * This function scans the given image and stores the found informations in
 187  * the given XpmImage structure.
 188  */
 189 #ifdef __OS2__
 190 /* Visual Age cannot deal with old, non-ansi, code */
 191 int XpmCreateXpmImageFromImage(
 192   Display*       display
 193 , XImage*        image
 194 , XImage*        shapeimage
 195 , XpmImage*      xpmimage
 196 , XpmAttributes* attributes
 197 )
 198 #else
 199 int
 200 XpmCreateXpmImageFromImage(display, image, shapeimage,
 201                            xpmimage, attributes)
 202     Display *display;
 203     XImage *image;
 204     XImage *shapeimage;
 205     XpmImage *xpmimage;
 206     XpmAttributes *attributes;
 207 #endif
 208 {
 209     /* variables stored in the XpmAttributes structure */
 210     unsigned int cpp;
 211
 212     /* variables to return */
 213     PixelsMap pmap;
 214     XpmColor *colorTable = NULL;
 215     int ErrorStatus;
 216
 217     /* calculation variables */
 218     unsigned int width = 0;
 219     unsigned int height = 0;
 220     unsigned int cppm;                  /* minimum chars per pixel */
 221     unsigned int c;
 222
 223     /* initialize pmap */
 224     pmap.pixels = NULL;
 225     pmap.pixelindex = NULL;
 226     pmap.size = 256;                    /* should be enough most of the time */
 227     pmap.ncolors = 0;
 228     pmap.mask_pixel = 0;
 229
 230     /*
 231      * get geometry
 232      */
 233     if (image) {
 234         width = image->width;
 235         height = image->height;
 236     } else if (shapeimage) {
 237         width = shapeimage->width;
 238         height = shapeimage->height;
 239     }
 240
 241     /*
 242      * retrieve information from the XpmAttributes
 243      */
 244     if (attributes && (attributes->valuemask & XpmCharsPerPixel
 245 /* 3.2 backward compatibility code */
 246                        || attributes->valuemask & XpmInfos))
 247 /* end 3.2 bc */
 248         cpp = attributes->cpp;
 249     else
 250         cpp = 0;
 251
 252     pmap.pixelindex =
 253         (unsigned int *) XpmCalloc(width * height, sizeof(unsigned int));
 254     if (!pmap.pixelindex)
 255         RETURN(XpmNoMemory);
 256
 257     pmap.pixels = (Pixel *) XpmMalloc(sizeof(Pixel) * pmap.size);
 258     if (!pmap.pixels)
 259         RETURN(XpmNoMemory);
 260
 261     /*
 262      * scan shape mask if any
 263      */
 264     if (shapeimage)
 265     {
 266 #ifndef FOR_MSW
 267 # ifndef AMIGA
 268             ErrorStatus = GetImagePixels1(shapeimage, width, height, &pmap,
 269                                       storeMaskPixel);
 270 # else
 271             ErrorStatus = AGetImagePixels(shapeimage, width, height, &pmap,
 272                                       storeMaskPixel);
 273 # endif /* AMIGA */
 274 #else
 275
 276 #ifndef __OS2__
 277             ErrorStatus = MSWGetImagePixels(display, shapeimage, width, height,
 278                                         &pmap, storeMaskPixel);
 279 /* calling convention all messed up OS/2 -- figure out later */
 280 #endif
 281
 282 #endif /* ndef for FOR_MSW */
 283
 284         if (ErrorStatus != XpmSuccess)
 285             RETURN(ErrorStatus);
 286     }
 287
 288     /*
 289      * scan the image data
 290      *
 291      * In case depth is 1 or bits_per_pixel is 4, 6, 8, 24 or 32 use optimized
 292      * functions, otherwise use slower but sure general one.
 293      *
 294      */
 295
 296     if (image)
 297     {
 298 #ifndef FOR_MSW
 299 # ifndef AMIGA
 300             if (((image->bits_per_pixel | image->depth) == 1)  &&
 301                 (image->byte_order == image->bitmap_bit_order))
 302             ErrorStatus = GetImagePixels1(image, width, height, &pmap,
 303                                           storePixel);
 304             else if (image->format == ZPixmap)
 305         {
 306                 if (image->bits_per_pixel == 8)
 307                     ErrorStatus = GetImagePixels8(image, width, height, &pmap);
 308                 else if (image->bits_per_pixel == 16)
 309                         ErrorStatus = GetImagePixels16(image, width, height, &pmap);
 310             else if (image->bits_per_pixel == 32)
 311                         ErrorStatus = GetImagePixels32(image, width, height, &pmap);
 312         }
 313             else
 314                 ErrorStatus = GetImagePixels(image, width, height, &pmap);
 315 # else
 316             ErrorStatus = AGetImagePixels(image, width, height, &pmap,
 317                                       storePixel);
 318 # endif /* AMIGA */
 319 #else
 320
 321 #ifndef __VISAGECPP30__
 322             ErrorStatus = MSWGetImagePixels(display, image, width, height, &pmap,
 323                                         storePixel);
 324 #endif
 325
 326 #endif
 327
 328             if (ErrorStatus != XpmSuccess)
 329                 RETURN(ErrorStatus);
 330     }
 331
 332     /*
 333      * get rgb values and a string of char, and possibly a name for each
 334      * color
 335      */
 336
 337     colorTable = (XpmColor *) XpmCalloc(pmap.ncolors, sizeof(XpmColor));
 338     if (!colorTable)
 339         RETURN(XpmNoMemory);
 340
 341     /* compute the minimal cpp */
 342     for (cppm = 1, c = MAXPRINTABLE; pmap.ncolors > c; cppm++)
 343         c *= MAXPRINTABLE;
 344     if (cpp < cppm)
 345         cpp = cppm;
 346
 347     if (pmap.mask_pixel) {
 348         ErrorStatus = ScanTransparentColor(colorTable, cpp, attributes);
 349         if (ErrorStatus != XpmSuccess)
 350             RETURN(ErrorStatus);
 351     }
 352
 353     ErrorStatus = ScanOtherColors(display, colorTable, pmap.ncolors,
 354                                   pmap.pixels, pmap.mask_pixel, cpp,
 355                                   attributes);
 356     if (ErrorStatus != XpmSuccess)
 357         RETURN(ErrorStatus);
 358
 359     /*
 360      * store found informations in the XpmImage structure
 361      */
 362     xpmimage->width = width;
 363     xpmimage->height = height;
 364     xpmimage->cpp = cpp;
 365     xpmimage->ncolors = pmap.ncolors;
 366     xpmimage->colorTable = colorTable;
 367     xpmimage->data = pmap.pixelindex;
 368
 369     XpmFree(pmap.pixels);
 370     return (XpmSuccess);
 371
 372 /* exit point in case of error, free only locally allocated variables */
 373 error:
 374     if (pmap.pixelindex)
 375         XpmFree(pmap.pixelindex);
 376     if (pmap.pixels)
 377         XpmFree(pmap.pixels);
 378     if (colorTable)
 379         xpmFreeColorTable(colorTable, pmap.ncolors);
 380
 381     return (ErrorStatus);
 382 }
 383
 384 #ifdef __OS2__
 385 /* Visual Age cannot deal with old, non-ansi, code */
 386 static int ScanTransparentColor(XpmColor* color, unsigned int cpp, XpmAttributes* attributes)
 387 #else
 388 static int
 389 ScanTransparentColor(color, cpp, attributes)
 390     XpmColor *color;
 391     unsigned int cpp;
 392     XpmAttributes *attributes;
 393 #endif
 394 {
 395     char *s;
 396     unsigned int a, b, c;
 397
 398     /* first get a character string */
 399     a = 0;
 400     if (!(s = color->string = (char *) XpmMalloc(cpp + 1)))
 401         return (XpmNoMemory);
 402     *s++ = printable[c = a % MAXPRINTABLE];
 403     for (b = 1; b < cpp; b++, s++)
 404         *s = printable[c = ((a - c) / MAXPRINTABLE) % MAXPRINTABLE];
 405     *s = '\0';
 406
 407     /* then retreive related info from the attributes if any */
 408     if (attributes && (attributes->valuemask & XpmColorTable
 409 /* 3.2 backward compatibility code */
 410                        || attributes->valuemask & XpmInfos)
 411 /* end 3.2 bc */
 412         && attributes->mask_pixel != XpmUndefPixel) {
 413
 414         unsigned int key;
 415         char **defaults = (char **) color;
 416         char **mask_defaults;
 417
 418 /* 3.2 backward compatibility code */
 419         if (attributes->valuemask & XpmColorTable)
 420 /* end 3.2 bc */
 421             mask_defaults = (char **) (
 422                 attributes->colorTable + attributes->mask_pixel);
 423 /* 3.2 backward compatibility code */
 424         else
 425             mask_defaults = (char **)
 426                 ((XpmColor **) attributes->colorTable)[attributes->mask_pixel];
 427 /* end 3.2 bc */
 428         for (key = 1; key <= NKEYS; key++) {
 429             if (s = mask_defaults[key]) {
 430                 defaults[key] = (char *) xpmstrdup(s);
 431                 if (!defaults[key])
 432                     return (XpmNoMemory);
 433             }
 434         }
 435     } else {
 436         color->c_color = (char *) xpmstrdup(TRANSPARENT_COLOR);
 437         if (!color->c_color)
 438             return (XpmNoMemory);
 439     }
 440     return (XpmSuccess);
 441 }
 442
 443 #ifdef __OS2__
 444 /* Visual Age cannot deal with old, non-ansi, code */
 445 static int ScanOtherColors(
 446   Display*       display
 447 , XpmColor*      colors
 448 , int            ncolors
 449 , Pixel*         pixels
 450 , unsigned int   mask
 451 , unsigned int   cpp
 452 , XpmAttributes* attributes
 453 )
 454 #else
 455 static int
 456 ScanOtherColors(display, colors, ncolors, pixels, mask, cpp, attributes)
 457     Display *display;
 458     XpmColor *colors;
 459     int ncolors;
 460     Pixel *pixels;
 461     unsigned int mask;
 462     unsigned int cpp;
 463     XpmAttributes *attributes;
 464 #endif
 465 {
 466     /* variables stored in the XpmAttributes structure */
 467     Colormap colormap;
 468     char *rgb_fname;
 469
 470 #ifndef FOR_MSW
 471     xpmRgbName rgbn[MAX_RGBNAMES];
 472 #else
 473     xpmRgbName *rgbn = NULL;
 474 #endif
 475     int rgbn_max = 0;
 476     unsigned int i, j, c, i2;
 477     XpmColor *color;
 478     XColor *xcolors = NULL, *xcolor;
 479     char *colorname, *s;
 480     XpmColor *colorTable, **oldColorTable = NULL;
 481     unsigned int ancolors = 0;
 482     Pixel *apixels;
 483     unsigned int mask_pixel;
 484     Bool found;
 485
 486     /* retrieve information from the XpmAttributes */
 487     if (attributes && (attributes->valuemask & XpmColormap))
 488         colormap = attributes->colormap;
 489     else
 490         colormap = XDefaultColormap(display, XDefaultScreen(display));
 491     if (attributes && (attributes->valuemask & XpmRgbFilename))
 492         rgb_fname = attributes->rgb_fname;
 493     else
 494         rgb_fname = NULL;
 495
 496     /* start from the right element */
 497     if (mask) {
 498         colors++;
 499         ncolors--;
 500         pixels++;
 501     }
 502
 503     /* first get character strings and rgb values */
 504     xcolors = (XColor *) XpmMalloc(sizeof(XColor) * ncolors);
 505     if (!xcolors)
 506         return (XpmNoMemory);
 507
 508     for (i = 0, i2 = mask, color = colors, xcolor = xcolors;
 509          i < (unsigned)ncolors; i++, i2++, color++, xcolor++, pixels++) {
 510
 511         if (!(s = color->string = (char *) XpmMalloc(cpp + 1))) {
 512             XpmFree(xcolors);
 513             return (XpmNoMemory);
 514         }
 515         *s++ = printable[c = i2 % MAXPRINTABLE];
 516         for (j = 1; j < cpp; j++, s++)
 517             *s = printable[c = ((i2 - c) / MAXPRINTABLE) % MAXPRINTABLE];
 518         *s = '\0';
 519
 520         xcolor->pixel = *pixels;
 521     }
 522 #ifdef __OS2__
 523     XQueryColors(display, &colormap, xcolors, ncolors);
 524 #else
 525     XQueryColors(display, colormap, xcolors, ncolors);
 526 #endif
 527
 528 #ifndef FOR_MSW
 529     /* read the rgb file if any was specified */
 530     if (rgb_fname)
 531         rgbn_max = xpmReadRgbNames(attributes->rgb_fname, rgbn);
 532 #else
 533     /* FOR_MSW: rgb names and values are hardcoded in rgbtab.h */
 534     rgbn_max = xpmReadRgbNames(NULL, NULL);
 535 #endif
 536
 537     if (attributes && attributes->valuemask & XpmColorTable) {
 538         colorTable = attributes->colorTable;
 539         ancolors = attributes->ncolors;
 540         apixels = attributes->pixels;
 541         mask_pixel = attributes->mask_pixel;
 542     }
 543 /* 3.2 backward compatibility code */
 544     else if (attributes && attributes->valuemask & XpmInfos) {
 545         oldColorTable = (XpmColor **) attributes->colorTable;
 546         ancolors = attributes->ncolors;
 547         apixels = attributes->pixels;
 548         mask_pixel = attributes->mask_pixel;
 549     }
 550 /* end 3.2 bc */
 551
 552     for (i = 0, color = colors, xcolor = xcolors; i < (unsigned)ncolors;
 553                                                   i++, color++, xcolor++) {
 554
 555         /* look for related info from the attributes if any */
 556         found = False;
 557         if (ancolors) {
 558             unsigned int offset = 0;
 559
 560             for (j = 0; j < ancolors; j++) {
 561                 if (j == mask_pixel) {
 562                     offset = 1;
 563                     continue;
 564                 }
 565                 if (apixels[j - offset] == xcolor->pixel)
 566                     break;
 567             }
 568             if (j != ancolors) {
 569                 unsigned int key;
 570                 char **defaults = (char **) color;
 571                 char **adefaults;
 572
 573 /* 3.2 backward compatibility code */
 574                 if (oldColorTable)
 575                     adefaults = (char **) oldColorTable[j];
 576                 else
 577 /* end 3.2 bc */
 578                     adefaults = (char **) (colorTable + j);
 579
 580                 found = True;
 581                 for (key = 1; key <= NKEYS; key++) {
 582                     if (s = adefaults[key])
 583                         defaults[key] = (char *) xpmstrdup(s);
 584                 }
 585             }
 586         }
 587         if (!found) {
 588             /* if nothing found look for a color name */
 589             colorname = NULL;
 590             if (rgbn_max)
 591                 colorname = xpmGetRgbName(rgbn, rgbn_max, xcolor->red,
 592                                           xcolor->green, xcolor->blue);
 593             if (colorname)
 594                 color->c_color = (char *) xpmstrdup(colorname);
 595             else {
 596                 /* at last store the rgb value */
 597                 char buf[BUFSIZ];
 598 #ifndef FOR_MSW
 599                 sprintf(buf, "#%04X%04X%04X",
 600                         xcolor->red, xcolor->green, xcolor->blue);
 601 #else
 602                 sprintf(buf, "#%02x%02x%02x",
 603                         xcolor->red, xcolor->green, xcolor->blue);
 604 #endif
 605                 color->c_color = (char *) xpmstrdup(buf);
 606             }
 607             if (!color->c_color) {
 608                 XpmFree(xcolors);
 609                 xpmFreeRgbNames(rgbn, rgbn_max);
 610                 return (XpmNoMemory);
 611             }
 612         }
 613     }
 614
 615     XpmFree(xcolors);
 616     xpmFreeRgbNames(rgbn, rgbn_max);
 617     return (XpmSuccess);
 618 }
 619
 620 #ifndef FOR_MSW
 621 # ifndef AMIGA
 622 /*
 623  * The functions below are written from X11R5 MIT's code (XImUtil.c)
 624  *
 625  * The idea is to have faster functions than the standard XGetPixel function
 626  * to scan the image data. Indeed we can speed up things by suppressing tests
 627  * performed for each pixel. We do exactly the same tests but at the image
 628  * level.
 629  */
 630
 631 static unsigned long Const low_bits_table[] = {
 632     0x00000000, 0x00000001, 0x00000003, 0x00000007,
 633     0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f,
 634     0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff,
 635     0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff,
 636     0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff,
 637     0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff,
 638     0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff,
 639     0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff,
 640     0xffffffff
 641 };
 642
 643 /*
 644  * Default method to scan pixels of an image data structure.
 645  * The algorithm used is:
 646  *
 647  *      copy the source bitmap_unit or Zpixel into temp
 648  *      normalize temp if needed
 649  *      extract the pixel bits into return value
 650  *
 651  */
 652
 653 static int
 654 GetImagePixels(image, width, height, pmap)
 655     XImage *image;
 656     unsigned int width;
 657     unsigned int height;
 658     PixelsMap *pmap;
 659 {
 660     char *src;
 661     char *dst;
 662     unsigned int *iptr;
 663     char *data;
 664     int x, y, i;
 665     int bits, depth, ibu, ibpp, offset;
 666     unsigned long lbt;
 667     Pixel pixel, px;
 668
 669     data = image->data;
 670     iptr = pmap->pixelindex;
 671     depth = image->depth;
 672     lbt = low_bits_table[depth];
 673     ibpp = image->bits_per_pixel;
 674     offset = image->xoffset;
 675
 676     if ((image->bits_per_pixel | image->depth) == 1) {
 677         ibu = image->bitmap_unit;
 678         for (y = 0; y < height; y++)
 679             for (x = 0; x < width; x++, iptr++) {
 680                 src = &data[XYINDEX(x, y, image)];
 681                 dst = (char *) &pixel;
 682                 pixel = 0;
 683                 for (i = ibu >> 3; --i >= 0;)
 684                     *dst++ = *src++;
 685                 XYNORMALIZE(&pixel, image);
 686                 bits = (x + offset) % ibu;
 687                 pixel = ((((char *) &pixel)[bits >> 3]) >> (bits & 7)) & 1;
 688                 if (ibpp != depth)
 689                     pixel &= lbt;
 690                 if (storePixel(pixel, pmap, iptr))
 691                     return (XpmNoMemory);
 692             }
 693     } else if (image->format == XYPixmap) {
 694         int nbytes, bpl, j;
 695         long plane = 0;
 696         ibu = image->bitmap_unit;
 697         nbytes = ibu >> 3;
 698         bpl = image->bytes_per_line;
 699         for (y = 0; y < height; y++)
 700             for (x = 0; x < width; x++, iptr++) {
 701                 pixel = 0;
 702                 plane = 0;
 703                 for (i = depth; --i >= 0;) {
 704                     src = &data[XYINDEX(x, y, image) + plane];
 705                     dst = (char *) &px;
 706                     px = 0;
 707                     for (j = nbytes; --j >= 0;)
 708                         *dst++ = *src++;
 709                     XYNORMALIZE(&px, image);
 710                     bits = (x + offset) % ibu;
 711                     pixel = (pixel << 1) |
 712                             (((((char *) &px)[bits >> 3]) >> (bits & 7)) & 1);
 713                     plane = plane + (bpl * height);
 714                 }
 715                 if (ibpp != depth)
 716                     pixel &= lbt;
 717                 if (storePixel(pixel, pmap, iptr))
 718                     return (XpmNoMemory);
 719             }
 720     } else if (image->format == ZPixmap) {
 721         for (y = 0; y < height; y++)
 722             for (x = 0; x < width; x++, iptr++) {
 723                 src = &data[ZINDEX(x, y, image)];
 724                 dst = (char *) &px;
 725                 px = 0;
 726                 for (i = (ibpp + 7) >> 3; --i >= 0;)
 727                     *dst++ = *src++;
 728                 ZNORMALIZE(&px, image);
 729                 pixel = 0;
 730                 for (i = sizeof(unsigned long); --i >= 0;)
 731                     pixel = (pixel << 8) | ((unsigned char *) &px)[i];
 732                 if (ibpp == 4) {
 733                     if (x & 1)
 734                         pixel >>= 4;
 735                     else
 736                         pixel &= 0xf;
 737                 }
 738                 if (ibpp != depth)
 739                     pixel &= lbt;
 740                 if (storePixel(pixel, pmap, iptr))
 741                     return (XpmNoMemory);
 742             }
 743     } else
 744         return (XpmColorError); /* actually a bad image */
 745     return (XpmSuccess);
 746 }
 747
 748 /*
 749  * scan pixels of a 32-bits Z image data structure
 750  */
 751
 752 #if !defined(WORD64) && !defined(LONG64)
 753 static unsigned long byteorderpixel = MSBFirst << 24;
 754 #endif
 755
 756 static int
 757 GetImagePixels32(image, width, height, pmap)
 758     XImage *image;
 759     unsigned int width;
 760     unsigned int height;
 761     PixelsMap *pmap;
 762 {
 763     unsigned char *addr;
 764     unsigned char *data;
 765     unsigned int *iptr;
 766     int x, y;
 767     unsigned long lbt;
 768     Pixel pixel;
 769     int depth;
 770
 771     data = (unsigned char *) image->data;
 772     iptr = pmap->pixelindex;
 773     depth = image->depth;
 774     lbt = low_bits_table[depth];
 775 #if !defined(WORD64) && !defined(LONG64)
 776     if (*((char *) &byteorderpixel) == image->byte_order) {
 777         for (y = 0; y < height; y++)
 778             for (x = 0; x < width; x++, iptr++) {
 779                 addr = &data[ZINDEX32(x, y, image)];
 780                 pixel = *((unsigned long *) addr);
 781                 if (depth != 32)
 782                     pixel &= lbt;
 783                 if (storePixel(pixel, pmap, iptr))
 784                     return (XpmNoMemory);
 785             }
 786     } else
 787 #endif
 788     if (image->byte_order == MSBFirst)
 789         for (y = 0; y < height; y++)
 790             for (x = 0; x < width; x++, iptr++) {
 791                 addr = &data[ZINDEX32(x, y, image)];
 792                 pixel = ((unsigned long) addr[0] << 24 |
 793                          (unsigned long) addr[1] << 16 |
 794                          (unsigned long) addr[2] << 8 |
 795                          addr[3]);
 796                 if (depth != 32)
 797                     pixel &= lbt;
 798                 if (storePixel(pixel, pmap, iptr))
 799                     return (XpmNoMemory);
 800             }
 801     else
 802         for (y = 0; y < height; y++)
 803             for (x = 0; x < width; x++, iptr++) {
 804                 addr = &data[ZINDEX32(x, y, image)];
 805                 pixel = (addr[0] |
 806                          (unsigned long) addr[1] << 8 |
 807                          (unsigned long) addr[2] << 16 |
 808                          (unsigned long) addr[3] << 24);
 809                 if (depth != 32)
 810                     pixel &= lbt;
 811                 if (storePixel(pixel, pmap, iptr))
 812                     return (XpmNoMemory);
 813             }
 814     return (XpmSuccess);
 815 }
 816
 817 /*
 818  * scan pixels of a 16-bits Z image data structure
 819  */
 820
 821 static int
 822 GetImagePixels16(image, width, height, pmap)
 823     XImage *image;
 824     unsigned int width;
 825     unsigned int height;
 826     PixelsMap *pmap;
 827 {
 828     unsigned char *addr;
 829     unsigned char *data;
 830     unsigned int *iptr;
 831     int x, y;
 832     unsigned long lbt;
 833     Pixel pixel;
 834     int depth;
 835
 836     data = (unsigned char *) image->data;
 837     iptr = pmap->pixelindex;
 838     depth = image->depth;
 839     lbt = low_bits_table[depth];
 840     if (image->byte_order == MSBFirst)
 841         for (y = 0; y < height; y++)
 842             for (x = 0; x < width; x++, iptr++) {
 843                 addr = &data[ZINDEX16(x, y, image)];
 844                 pixel = addr[0] << 8 | addr[1];
 845                 if (depth != 16)
 846                     pixel &= lbt;
 847                 if (storePixel(pixel, pmap, iptr))
 848                     return (XpmNoMemory);
 849             }
 850     else
 851         for (y = 0; y < height; y++)
 852             for (x = 0; x < width; x++, iptr++) {
 853                 addr = &data[ZINDEX16(x, y, image)];
 854                 pixel = addr[0] | addr[1] << 8;
 855                 if (depth != 16)
 856                     pixel &= lbt;
 857                 if (storePixel(pixel, pmap, iptr))
 858                     return (XpmNoMemory);
 859             }
 860     return (XpmSuccess);
 861 }
 862
 863 /*
 864  * scan pixels of a 8-bits Z image data structure
 865  */
 866
 867 static int
 868 GetImagePixels8(image, width, height, pmap)
 869     XImage *image;
 870     unsigned int width;
 871     unsigned int height;
 872     PixelsMap *pmap;
 873 {
 874     unsigned int *iptr;
 875     unsigned char *data;
 876     int x, y;
 877     unsigned long lbt;
 878     Pixel pixel;
 879     int depth;
 880
 881     data = (unsigned char *) image->data;
 882     iptr = pmap->pixelindex;
 883     depth = image->depth;
 884     lbt = low_bits_table[depth];
 885     for (y = 0; y < height; y++)
 886         for (x = 0; x < width; x++, iptr++) {
 887             pixel = data[ZINDEX8(x, y, image)];
 888             if (depth != 8)
 889                 pixel &= lbt;
 890             if (storePixel(pixel, pmap, iptr))
 891                 return (XpmNoMemory);
 892         }
 893     return (XpmSuccess);
 894 }
 895
 896 /*
 897  * scan pixels of a 1-bit depth Z image data structure
 898  */
 899
 900 static int
 901 GetImagePixels1(image, width, height, pmap, storeFunc)
 902     XImage *image;
 903     unsigned int width;
 904     unsigned int height;
 905     PixelsMap *pmap;
 906     int (*storeFunc) ();
 907 {
 908     unsigned int *iptr;
 909     int x, y;
 910     char *data;
 911     Pixel pixel;
 912     int xoff, yoff, offset, bpl;
 913
 914     data = image->data;
 915     iptr = pmap->pixelindex;
 916     offset = image->xoffset;
 917     bpl = image->bytes_per_line;
 918
 919     if (image->bitmap_bit_order == MSBFirst)
 920         for (y = 0; y < height; y++)
 921             for (x = 0; x < width; x++, iptr++) {
 922                 xoff = x + offset;
 923                 yoff = y * bpl + (xoff >> 3);
 924                 xoff &= 7;
 925                 pixel = (data[yoff] & (0x80 >> xoff)) ? 1 : 0;
 926                 if ((*storeFunc) (pixel, pmap, iptr))
 927                     return (XpmNoMemory);
 928             }
 929     else
 930         for (y = 0; y < height; y++)
 931             for (x = 0; x < width; x++, iptr++) {
 932                 xoff = x + offset;
 933                 yoff = y * bpl + (xoff >> 3);
 934                 xoff &= 7;
 935                 pixel = (data[yoff] & (1 << xoff)) ? 1 : 0;
 936                 if ((*storeFunc) (pixel, pmap, iptr))
 937                     return (XpmNoMemory);
 938             }
 939     return (XpmSuccess);
 940 }
 941
 942 # else /* AMIGA */
 943
 944 #define CLEAN_UP(status) \
 945 {\
 946     if (pixels) XpmFree (pixels);\
 947     if (tmp_img) FreeXImage (tmp_img);\
 948     return (status);\
 949 }
 950
 951 static int
 952 AGetImagePixels (
 953     XImage        *image,
 954     unsigned int   width,
 955     unsigned int   height,
 956     PixelsMap     *pmap,
 957     int          (*storeFunc) ())
 958 {
 959     unsigned int   *iptr;
 960     unsigned int    x, y;
 961     unsigned char  *pixels;
 962     XImage         *tmp_img;
 963
 964     pixels = XpmMalloc ((((width+15)>>4)<<4)*sizeof (*pixels));
 965     if (pixels == NULL)
 966         return XpmNoMemory;
 967
 968     tmp_img = AllocXImage ((((width+15)>>4)<<4), 1, image->rp->BitMap->Depth);
 969     if (tmp_img == NULL)
 970         CLEAN_UP (XpmNoMemory)
 971
 972     iptr = pmap->pixelindex;
 973     for (y = 0; y < height; ++y)
 974     {
 975         ReadPixelLine8 (image->rp, 0, y, width, pixels, tmp_img->rp);
 976         for (x = 0; x < width; ++x, ++iptr)
 977         {
 978             if ((*storeFunc) (pixels[x], pmap, iptr))
 979                 CLEAN_UP (XpmNoMemory)
 980         }
 981     }
 982
 983     CLEAN_UP (XpmSuccess)
 984 }
 985
 986 #undef CLEAN_UP
 987
 988 # endif/* AMIGA */
 989 #else  /* ndef FOR_MSW */
 990
 991 #ifdef __OS2__
 992
 993 #ifdef __VISAGECPP30__
 994 static int MSWGetImagePixels(
 995   Display*     display
 996 , XImage*      image
 997 , unsigned int width
 998 , unsigned int height
 999 , PixelsMap*   pmap
1000 , int          (*storeFunc) (Pixel, PixelsMap*, unsigned int*)
1001 )
1002 #else
1003 static int MSWGetImagePixels(
1004   Display*     display
1005 , XImage*      image
1006 , unsigned int width
1007 , unsigned int height
1008 , PixelsMap*   pmap
1009 , int          (*storeFunc) ()
1010 )
1011 #endif
1012
1013 #else
1014 static int
1015 MSWGetImagePixels(display, image, width, height, pmap, storeFunc)
1016     Display *display;
1017     XImage *image;
1018     unsigned int width;
1019     unsigned int height;
1020     PixelsMap *pmap;
1021     int (*storeFunc) ();
1022 #endif
1023 {
1024     unsigned int *iptr;
1025     unsigned int x, y;
1026     Pixel pixel;
1027 #ifdef __OS2__
1028      HAB          hab;
1029      HPS          hps;
1030      DEVOPENSTRUC dop = {NULL, "DISPLAY", NULL, NULL, NULL, NULL, NULL, NULL, NULL};
1031      SIZEL        sizl = {0, 0};
1032      POINTL       point;
1033 #endif
1034
1035     iptr = pmap->pixelindex;
1036
1037 #ifdef __OS2__
1038     hps = GpiCreatePS(hab, *display, &sizl, GPIA_ASSOC | PU_PELS);
1039     GpiSetBitmap(hps, image->bitmap);
1040 #else
1041     SelectObject(*display, image->bitmap);
1042 #endif
1043
1044     for (y = 0; y < height; y++) {
1045         for (x = 0; x < width; x++, iptr++) {
1046 #ifdef __OS2__
1047      point.x = x;
1048      point.y = y;
1049      pixel = GpiQueryPel(hps, &point);
1050 #else
1051             pixel = GetPixel(*display, x, y);
1052 #endif
1053
1054             if ((*storeFunc) (pixel, pmap, iptr))
1055                 return (XpmNoMemory);
1056         }
1057     }
1058     return (XpmSuccess);
1059 }
1060
1061 #endif
1062
1063 #ifndef FOR_MSW
1064 # ifndef AMIGA
1065 int
1066 XpmCreateXpmImageFromPixmap(display, pixmap, shapemask,
1067                             xpmimage, attributes)
1068     Display *display;
1069     Pixmap pixmap;
1070     Pixmap shapemask;
1071     XpmImage *xpmimage;
1072     XpmAttributes *attributes;
1073 {
1074     XImage *ximage = NULL;
1075     XImage *shapeimage = NULL;
1076     unsigned int width = 0;
1077     unsigned int height = 0;
1078     int ErrorStatus;
1079
1080     /* get geometry */
1081     if (attributes && attributes->valuemask & XpmSize) {
1082         width = attributes->width;
1083         height = attributes->height;
1084     }
1085     /* get the ximages */
1086     if (pixmap)
1087         xpmCreateImageFromPixmap(display, pixmap, &ximage, &width, &height);
1088     if (shapemask)
1089         xpmCreateImageFromPixmap(display, shapemask, &shapeimage,
1090                                  &width, &height);
1091
1092     /* create the related XpmImage */
1093     ErrorStatus = XpmCreateXpmImageFromImage(display, ximage, shapeimage,
1094                                              xpmimage, attributes);
1095
1096     /* destroy the ximages */
1097     if (ximage)
1098         XDestroyImage(ximage);
1099     if (shapeimage)
1100         XDestroyImage(shapeimage);
1101
1102     return (ErrorStatus);
1103 }
1104
1105 # endif/* not AMIGA */
1106 #endif /* ndef FOR_MSW */