src/pixbuf_util.c

   1 /*
   2  * Copyright (C) 2004 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: John Ellis
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include "main.h"
  23 #include "pixbuf_util.h"
  24 #include "exif.h"
  25 #include "ui_fileops.h"
  26
  27 #include "icons/icons_inline.h"
  28
  29 #include <math.h>
  30
  31
  32 /*
  33  *-----------------------------------------------------------------------------
  34  * png save
  35  *-----------------------------------------------------------------------------
  36  */
  37
  38 gboolean pixbuf_to_file_as_png(GdkPixbuf *pixbuf, const gchar *filename)
  39 {
  40         GError *error = NULL;
  41         gboolean ret;
  42
  43         if (!pixbuf || !filename) return FALSE;
  44
  45         ret = gdk_pixbuf_save(pixbuf, filename, "png", &error,
  46                               "tEXt::Software", GQ_APPNAME " " VERSION, NULL);
  47
  48         if (error)
  49                 {
  50                 log_printf("Error saving png file: %s\n", error->message);
  51                 g_error_free(error);
  52                 }
  53
  54         return ret;
  55 }
  56
  57 /*
  58  *-----------------------------------------------------------------------------
  59  * jpeg save
  60  *-----------------------------------------------------------------------------
  61  */
  62
  63 gboolean pixbuf_to_file_as_jpg(GdkPixbuf *pixbuf, const gchar *filename, gint quality)
  64 {
  65         GError *error = NULL;
  66         gchar *qbuf;
  67         gboolean ret;
  68
  69         if (!pixbuf || !filename) return FALSE;
  70
  71         if (quality == -1) quality = 75;
  72         if (quality < 1 || quality > 100)
  73                 {
  74                 log_printf("Jpeg not saved, invalid quality %d\n", quality);
  75                 return FALSE;
  76                 }
  77
  78         qbuf = g_strdup_printf("%d", quality);
  79         ret = gdk_pixbuf_save(pixbuf, filename, "jpeg", &error, "quality", qbuf, NULL);
  80         g_free(qbuf);
  81
  82         if (error)
  83                 {
  84                 log_printf("Error saving jpeg to %s\n%s\n", filename, error->message);
  85                 g_error_free(error);
  86                 }
  87
  88         return ret;
  89 }
  90
  91 /*
  92  *-----------------------------------------------------------------------------
  93  * pixbuf from inline
  94  *-----------------------------------------------------------------------------
  95  */
  96
  97 typedef struct _PixbufInline PixbufInline;
  98 struct _PixbufInline
  99 {
 100         const gchar *key;
 101         const guint8 *data;
 102 };
 103
 104 static PixbufInline inline_pixbuf_data[] = {
 105         { PIXBUF_INLINE_FOLDER_CLOSED,  folder_closed },
 106         { PIXBUF_INLINE_FOLDER_LOCKED,  folder_locked },
 107         { PIXBUF_INLINE_FOLDER_OPEN,    folder_open },
 108         { PIXBUF_INLINE_FOLDER_UP,      folder_up },
 109         { PIXBUF_INLINE_SCROLLER,       icon_scroller },
 110         { PIXBUF_INLINE_BROKEN,         icon_broken },
 111         { PIXBUF_INLINE_METADATA,       icon_metadata },
 112         { PIXBUF_INLINE_UNKNOWN,        icon_unknown },
 113         { PIXBUF_INLINE_VIDEO,          icon_video },
 114         { PIXBUF_INLINE_COLLECTION,     icon_collection },
 115         { PIXBUF_INLINE_ICON,           gqview_icon },
 116         { PIXBUF_INLINE_LOGO,           geeqie_logo },
 117         { PIXBUF_INLINE_ICON_FLOAT,     icon_float },
 118         { PIXBUF_INLINE_ICON_THUMB,     icon_thumb },
 119         { PIXBUF_INLINE_ICON_BOOK,      icon_book },
 120         { PIXBUF_INLINE_ICON_CONFIG,    icon_config },
 121         { PIXBUF_INLINE_ICON_TOOLS,     icon_tools },
 122         { PIXBUF_INLINE_ICON_VIEW,      icon_view },
 123         { PIXBUF_INLINE_ICON_GUIDELINES,        icon_guidelines },
 124         { NULL, NULL }
 125 };
 126
 127 GdkPixbuf *pixbuf_inline(const gchar *key)
 128 {
 129         gint i;
 130
 131         if (!key) return NULL;
 132
 133         i = 0;
 134         while (inline_pixbuf_data[i].key)
 135                 {
 136                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 137                         {
 138                         return gdk_pixbuf_new_from_inline(-1, inline_pixbuf_data[i].data, FALSE, NULL);
 139                         }
 140                 i++;
 141                 }
 142
 143         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 144
 145         return NULL;
 146 }
 147
 148 static void register_stock_icon(const gchar *key, GdkPixbuf *pixbuf)
 149 {
 150         static GtkIconFactory *icon_factory = NULL;
 151         GtkIconSet *icon_set;
 152
 153         if (!icon_factory)
 154                 {
 155                 icon_factory = gtk_icon_factory_new();
 156                 gtk_icon_factory_add_default(icon_factory);
 157                 }
 158
 159         icon_set = gtk_icon_set_new_from_pixbuf(pixbuf);
 160         gtk_icon_factory_add(icon_factory, key, icon_set);
 161 }
 162
 163
 164 void pixbuf_inline_register_stock_icons(void)
 165 {
 166         gint i;
 167
 168         i = 0;
 169         while (inline_pixbuf_data[i].key)
 170                 {
 171                 register_stock_icon(inline_pixbuf_data[i].key, pixbuf_inline(inline_pixbuf_data[i].key));
 172                 i++;
 173                 }
 174 }
 175
 176 gboolean register_theme_icon_as_stock(const gchar *key, const gchar *icon)
 177 {
 178         GtkIconTheme *icon_theme;
 179         GdkPixbuf *pixbuf;
 180         GError *error = NULL;
 181
 182         icon_theme = gtk_icon_theme_get_default();
 183
 184         if (gtk_icon_theme_has_icon(icon_theme, key)) return FALSE;
 185
 186         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 187                            icon, /* icon name */
 188                            64, /* size */
 189                            0,  /* flags */
 190                            &error);
 191         if (!pixbuf)
 192                 {
 193                 if (error)
 194                         {
 195                         DEBUG_1("Couldn't load icon %s: %s", icon, error->message);
 196                         g_error_free(error);
 197                         error = NULL;
 198                         }
 199
 200                 if (strchr(icon, '.'))
 201                         {
 202                         /* try again without extension */
 203                         gchar *icon2 = remove_extension_from_path(icon);
 204                         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 205                                            icon2, /* icon name */
 206                                            64, /* size */
 207                                            0,  /* flags */
 208                                            &error);
 209                         if (error)
 210                                 {
 211                                 DEBUG_1("Couldn't load icon %s: %s", icon2, error->message);
 212                                 g_error_free(error);
 213                                 }
 214                         g_free(icon2);
 215                         }
 216                 }
 217
 218         if (!pixbuf) return FALSE;
 219
 220         register_stock_icon(key, pixbuf);
 221         return TRUE;
 222 }
 223
 224 gboolean pixbuf_scale_aspect(gint req_w, gint req_h,
 225                              gint old_w, gint old_h,
 226                              gint *new_w, gint *new_h)
 227 {
 228         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 229                 {
 230                 *new_w = req_w;
 231                 *new_h = (gdouble)*new_w / old_w * old_h;
 232                 if (*new_h < 1) *new_h = 1;
 233                 }
 234         else
 235                 {
 236                 *new_h = req_h;
 237                 *new_w = (gdouble)*new_h / old_h * old_w;
 238                 if (*new_w < 1) *new_w = 1;
 239                 }
 240
 241         return (*new_w != old_w || *new_h != old_h);
 242 }
 243
 244 GdkPixbuf *pixbuf_fallback(FileData *fd, gint requested_width, gint requested_height)
 245 {
 246         GdkPixbuf *pixbuf;
 247
 248         switch (fd->format_class)
 249                 {
 250                 case FORMAT_CLASS_UNKNOWN:
 251                         pixbuf = pixbuf_inline(PIXBUF_INLINE_UNKNOWN);
 252                         break;
 253                 case FORMAT_CLASS_META:
 254                         pixbuf = pixbuf_inline(PIXBUF_INLINE_METADATA);
 255                         break;
 256                 case FORMAT_CLASS_VIDEO:
 257                         pixbuf = pixbuf_inline(PIXBUF_INLINE_VIDEO);
 258                         break;
 259                 case FORMAT_CLASS_COLLECTION:
 260                         pixbuf = pixbuf_inline(PIXBUF_INLINE_COLLECTION);
 261                         break;
 262                 default:
 263                         pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 264                 }
 265
 266         if (requested_width && requested_height)
 267                 {
 268                 gint w = gdk_pixbuf_get_width(pixbuf);
 269                 gint h = gdk_pixbuf_get_height(pixbuf);
 270
 271                 if (w > requested_width || h > requested_height)
 272                         {
 273                         gint nw, nh;
 274
 275                         if (pixbuf_scale_aspect(requested_width, requested_height,
 276                                                           w, h, &nw, &nh))
 277                                 {
 278                                 GdkPixbuf *tmp;
 279
 280                                 tmp = pixbuf;
 281                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 282                                 g_object_unref(G_OBJECT(tmp));
 283                                 }
 284                         }
 285                 }
 286         return pixbuf;
 287 }
 288
 289
 290 /*
 291  *-----------------------------------------------------------------------------
 292  * misc utils
 293  *-----------------------------------------------------------------------------
 294  */
 295
 296 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 297                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 298                           gint *rx, gint *ry, gint *rw, gint *rh)
 299 {
 300         if (clip_x + clip_w <= x ||
 301             clip_x >= x + w ||
 302             clip_y + clip_h <= y ||
 303             clip_y >= y + h)
 304                 {
 305                 return FALSE;
 306                 }
 307
 308         *rx = MAX(x, clip_x);
 309         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 310
 311         *ry = MAX(y, clip_y);
 312         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 313
 314         return TRUE;
 315 }
 316
 317 /*
 318  *-----------------------------------------------------------------------------
 319  * pixbuf rotation
 320  *-----------------------------------------------------------------------------
 321  */
 322
 323 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 324                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 325                                      gint bytes_per_pixel, gboolean counter_clockwise)
 326 {
 327         gint i, j;
 328         guchar *sp;
 329         guchar *dp;
 330
 331         for (i = 0; i < h; i++)
 332                 {
 333                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 334                 for (j = 0; j < w; j++)
 335                         {
 336                         if (counter_clockwise)
 337                                 {
 338                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 339                                 }
 340                         else
 341                                 {
 342                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 343                                 }
 344                         *(dp++) = *(sp++);      /* r */
 345                         *(dp++) = *(sp++);      /* g */
 346                         *(dp++) = *(sp++);      /* b */
 347                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 348                         }
 349                 }
 350
 351 }
 352
 353 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 354                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 355 {
 356         gint i;
 357         guchar *sp;
 358         guchar *dp;
 359
 360         for (i = 0; i < h; i++)
 361                 {
 362                 sp = src + (i * src_row_stride);
 363                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 364                 memcpy(dp, sp, w * bytes_per_pixel);
 365                 }
 366 }
 367
 368 #define ROTATE_BUFFER_WIDTH 48
 369 #define ROTATE_BUFFER_HEIGHT 48
 370
 371 /*
 372  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 373  *
 374  */
 375 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 376 {
 377         GdkPixbuf *dest;
 378         gboolean has_alpha;
 379         gint sw, sh, srs;
 380         gint dw, dh, drs;
 381         guchar *s_pix;
 382         guchar *d_pix;
 383         gint i, j;
 384         gint a;
 385         GdkPixbuf *buffer;
 386         guchar *b_pix;
 387         gint brs;
 388         gint w, h;
 389
 390         if (!src) return NULL;
 391
 392         sw = gdk_pixbuf_get_width(src);
 393         sh = gdk_pixbuf_get_height(src);
 394         has_alpha = gdk_pixbuf_get_has_alpha(src);
 395         srs = gdk_pixbuf_get_rowstride(src);
 396         s_pix = gdk_pixbuf_get_pixels(src);
 397
 398         dw = sh;
 399         dh = sw;
 400         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 401         drs = gdk_pixbuf_get_rowstride(dest);
 402         d_pix = gdk_pixbuf_get_pixels(dest);
 403
 404         a = (has_alpha ? 4 : 3);
 405
 406         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 407                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 408         b_pix = gdk_pixbuf_get_pixels(buffer);
 409         brs = gdk_pixbuf_get_rowstride(buffer);
 410
 411         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 412                 {
 413                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 414                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 415                         {
 416                         gint x, y;
 417
 418                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 419                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 420                                                  b_pix, brs, h, w,
 421                                                  a, counter_clockwise);
 422
 423                         if (counter_clockwise)
 424                                 {
 425                                 x = i;
 426                                 y = sw - h - j;
 427                                 }
 428                         else
 429                                 {
 430                                 x = sh - w - i;
 431                                 y = j;
 432                                 }
 433                         pixbuf_copy_block(b_pix, brs, w, h,
 434                                           d_pix, drs, x, y, a);
 435                         }
 436                 }
 437
 438         g_object_unref(buffer);
 439
 440 #if 0
 441         /* this is the simple version of rotation (roughly 2-4x slower) */
 442
 443         for (i = 0; i < sh; i++)
 444                 {
 445                 sp = s_pix + (i * srs);
 446                 for (j = 0; j < sw; j++)
 447                         {
 448                         if (counter_clockwise)
 449                                 {
 450                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 451                                 }
 452                         else
 453                                 {
 454                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 455                                 }
 456
 457                         *(dp++) = *(sp++);      /* r */
 458                         *(dp++) = *(sp++);      /* g */
 459                         *(dp++) = *(sp++);      /* b */
 460                         if (has_alpha) *(dp) = *(sp++); /* a */
 461                         }
 462                 }
 463 #endif
 464
 465         return dest;
 466 }
 467
 468 /*
 469  * Returns a copy of pixbuf mirrored and or flipped.
 470  * TO do a 180 degree rotations set both mirror and flipped TRUE
 471  * if mirror and flip are FALSE, result is a simple copy.
 472  */
 473 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 474 {
 475         GdkPixbuf *dest;
 476         gboolean has_alpha;
 477         gint w, h, srs;
 478         gint drs;
 479         guchar *s_pix;
 480         guchar *d_pix;
 481         guchar *sp;
 482         guchar *dp;
 483         gint i, j;
 484         gint a;
 485
 486         if (!src) return NULL;
 487
 488         w = gdk_pixbuf_get_width(src);
 489         h = gdk_pixbuf_get_height(src);
 490         has_alpha = gdk_pixbuf_get_has_alpha(src);
 491         srs = gdk_pixbuf_get_rowstride(src);
 492         s_pix = gdk_pixbuf_get_pixels(src);
 493
 494         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 495         drs = gdk_pixbuf_get_rowstride(dest);
 496         d_pix = gdk_pixbuf_get_pixels(dest);
 497
 498         a = has_alpha ? 4 : 3;
 499
 500         for (i = 0; i < h; i++)
 501                 {
 502                 sp = s_pix + (i * srs);
 503                 if (flip)
 504                         {
 505                         dp = d_pix + ((h - i - 1) * drs);
 506                         }
 507                 else
 508                         {
 509                         dp = d_pix + (i * drs);
 510                         }
 511                 if (mirror)
 512                         {
 513                         dp += (w - 1) * a;
 514                         for (j = 0; j < w; j++)
 515                                 {
 516                                 *(dp++) = *(sp++);      /* r */
 517                                 *(dp++) = *(sp++);      /* g */
 518                                 *(dp++) = *(sp++);      /* b */
 519                                 if (has_alpha) *(dp) = *(sp++); /* a */
 520                                 dp -= (a + 3);
 521                                 }
 522                         }
 523                 else
 524                         {
 525                         for (j = 0; j < w; j++)
 526                                 {
 527                                 *(dp++) = *(sp++);      /* r */
 528                                 *(dp++) = *(sp++);      /* g */
 529                                 *(dp++) = *(sp++);      /* b */
 530                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 531                                 }
 532                         }
 533                 }
 534
 535         return dest;
 536 }
 537
 538 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 539 {
 540         GdkPixbuf *dest;
 541         GdkPixbuf *tmp = NULL;
 542
 543         switch (orientation)
 544                 {
 545                 case EXIF_ORIENTATION_TOP_LEFT:
 546                         dest = gdk_pixbuf_copy(pixbuf);
 547                         break;
 548                 case EXIF_ORIENTATION_TOP_RIGHT:
 549                         /* mirrored */
 550                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 551                         break;
 552                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 553                         /* upside down */
 554                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 555                         break;
 556                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 557                         /* flipped */
 558                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 559                         break;
 560                 case EXIF_ORIENTATION_LEFT_TOP:
 561                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 562                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 563                         break;
 564                 case EXIF_ORIENTATION_RIGHT_TOP:
 565                         /* rotated -90 (270) */
 566                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 567                         break;
 568                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 569                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 570                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 571                         break;
 572                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 573                         /* rotated 90 */
 574                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 575                         break;
 576                 default:
 577                         dest = gdk_pixbuf_copy(pixbuf);
 578                         break;
 579                 }
 580         if (tmp) g_object_unref(tmp);
 581         return dest;
 582
 583 }
 584
 585
 586 /*
 587  *-----------------------------------------------------------------------------
 588  * pixbuf drawing (rectangles)
 589  *-----------------------------------------------------------------------------
 590  */
 591
 592 /*
 593  * Fills region of pixbuf at x,y over w,h
 594  * with colors red (r), green (g), blue (b)
 595  * applying alpha (a), use a=255 for solid.
 596  */
 597 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 598                            gint x, gint y, gint w, gint h,
 599                            gint r, gint g, gint b, gint a)
 600 {
 601         gboolean has_alpha;
 602         gint pw, ph, prs;
 603         guchar *p_pix;
 604         guchar *pp;
 605         gint i, j;
 606
 607         if (!pb) return;
 608
 609         pw = gdk_pixbuf_get_width(pb);
 610         ph = gdk_pixbuf_get_height(pb);
 611
 612         if (x < 0 || x + w > pw) return;
 613         if (y < 0 || y + h > ph) return;
 614
 615         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 616         prs = gdk_pixbuf_get_rowstride(pb);
 617         p_pix = gdk_pixbuf_get_pixels(pb);
 618
 619         for (i = 0; i < h; i++)
 620                 {
 621                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 622                 for (j = 0; j < w; j++)
 623                         {
 624                         *pp = (r * a + *pp * (256-a)) >> 8;
 625                         pp++;
 626                         *pp = (g * a + *pp * (256-a)) >> 8;
 627                         pp++;
 628                         *pp = (b * a + *pp * (256-a)) >> 8;
 629                         pp++;
 630                         if (has_alpha) pp++;
 631                         }
 632                 }
 633 }
 634
 635 void pixbuf_draw_rect(GdkPixbuf *pb,
 636                       gint x, gint y, gint w, gint h,
 637                       gint r, gint g, gint b, gint a,
 638                       gint left, gint right, gint top, gint bottom)
 639 {
 640         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 641                               r, g, b ,a);
 642         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 643                               r, g, b ,a);
 644         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 645                               r, g, b ,a);
 646         pixbuf_draw_rect_fill(pb, x, y, left, h,
 647                               r, g, b ,a);
 648 }
 649
 650 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 651                           gint x, gint y, gint w, gint h,
 652                           gint r, gint g, gint b, gint a)
 653 {
 654         gboolean has_alpha;
 655         gint pw, ph, prs;
 656         guchar *p_pix;
 657         guchar *pp;
 658         gint i, j;
 659
 660         if (!pb) return;
 661
 662         pw = gdk_pixbuf_get_width(pb);
 663         ph = gdk_pixbuf_get_height(pb);
 664
 665         if (x < 0 || x + w > pw) return;
 666         if (y < 0 || y + h > ph) return;
 667
 668         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 669         prs = gdk_pixbuf_get_rowstride(pb);
 670         p_pix = gdk_pixbuf_get_pixels(pb);
 671
 672         for (i = 0; i < h; i++)
 673                 {
 674                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 675                 for (j = 0; j < w; j++)
 676                         {
 677                         *pp = r; pp++;
 678                         *pp = g; pp++;
 679                         *pp = b; pp++;
 680                         if (has_alpha) { *pp = a; pp++; }
 681                         }
 682                 }
 683 }
 684
 685 void pixbuf_set_rect(GdkPixbuf *pb,
 686                      gint x, gint y, gint w, gint h,
 687                      gint r, gint g, gint b, gint a,
 688                      gint left, gint right, gint top, gint bottom)
 689 {
 690         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 691                              r, g, b ,a);
 692         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 693                              r, g, b ,a);
 694         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 695                              r, g, b ,a);
 696         pixbuf_set_rect_fill(pb, x, y, left, h,
 697                              r, g, b ,a);
 698 }
 699
 700 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 701 {
 702         guchar *buf;
 703         gboolean has_alpha;
 704         gint rowstride;
 705         guchar *p;
 706
 707         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 708             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 709
 710         buf = gdk_pixbuf_get_pixels(pb);
 711         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 712         rowstride = gdk_pixbuf_get_rowstride(pb);
 713
 714         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 715         *p = r; p++;
 716         *p = g; p++;
 717         *p = b; p++;
 718         if (has_alpha) *p = a;
 719 }
 720
 721
 722 /*
 723  *-----------------------------------------------------------------------------
 724  * pixbuf text rendering
 725  *-----------------------------------------------------------------------------
 726  */
 727
 728 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 729                              GdkPixbuf *dest, gint dx, gint dy,
 730                              gint w, gint h,
 731                              guint8 r, guint8 g, guint8 b, guint8 a)
 732 {
 733         gint sw, sh, srs;
 734         gboolean s_alpha;
 735         gint s_step;
 736         guchar *s_pix;
 737         gint dw, dh, drs;
 738         gboolean d_alpha;
 739         gint d_step;
 740         guchar *d_pix;
 741
 742         guchar *sp;
 743         guchar *dp;
 744         gint i, j;
 745
 746         if (!src || !dest) return;
 747
 748         sw = gdk_pixbuf_get_width(src);
 749         sh = gdk_pixbuf_get_height(src);
 750
 751         if (sx < 0 || sx + w > sw) return;
 752         if (sy < 0 || sy + h > sh) return;
 753
 754         dw = gdk_pixbuf_get_width(dest);
 755         dh = gdk_pixbuf_get_height(dest);
 756
 757         if (dx < 0 || dx + w > dw) return;
 758         if (dy < 0 || dy + h > dh) return;
 759
 760         s_alpha = gdk_pixbuf_get_has_alpha(src);
 761         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 762         srs = gdk_pixbuf_get_rowstride(src);
 763         drs = gdk_pixbuf_get_rowstride(dest);
 764         s_pix = gdk_pixbuf_get_pixels(src);
 765         d_pix = gdk_pixbuf_get_pixels(dest);
 766
 767         s_step = (s_alpha) ? 4 : 3;
 768         d_step = (d_alpha) ? 4 : 3;
 769
 770         for (i = 0; i < h; i++)
 771                 {
 772                 sp = s_pix + (sy + i) * srs + sx * s_step;
 773                 dp = d_pix + (dy + i) * drs + dx * d_step;
 774                 for (j = 0; j < w; j++)
 775                         {
 776                         if (*sp)
 777                                 {
 778                                 guint8 asub;
 779
 780                                 asub = a * sp[0] / 255;
 781                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 782                                 dp++;
 783                                 asub = a * sp[1] / 255;
 784                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 785                                 dp++;
 786                                 asub = a * sp[2] / 255;
 787                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 788                                 dp++;
 789
 790                                 if (d_alpha)
 791                                         {
 792                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 793                                         dp++;
 794                                         }
 795                                 }
 796                         else
 797                                 {
 798                                 dp += d_step;
 799                                 }
 800
 801                         sp += s_step;
 802                         }
 803                 }
 804 }
 805
 806 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 807                         gint x, gint y,
 808                         guint8 r, guint8 g, guint8 b, guint8 a)
 809 {
 810         GdkPixbuf *buffer;
 811         gint w, h;
 812         gint sx, sy;
 813         gint dw, dh;
 814         cairo_surface_t *source;
 815         cairo_t *cr;
 816
 817         pango_layout_get_pixel_size(layout, &w, &h);
 818         if (w < 1 || h < 1) return;
 819
 820         source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
 821
 822         cr = cairo_create (source);
 823         cairo_set_source_rgb(cr, 0, 0, 0);
 824         cairo_rectangle (cr, 0, 0, w, h);
 825         cairo_fill (cr);
 826         cairo_set_source_rgb(cr, 1, 1, 1);
 827         pango_cairo_show_layout (cr, layout);
 828         cairo_destroy (cr);
 829
 830         buffer = gdk_pixbuf_new_from_data (cairo_image_surface_get_data (source),
 831                                            GDK_COLORSPACE_RGB,
 832                                            cairo_image_surface_get_format (source) == CAIRO_FORMAT_ARGB32,
 833                                            8,
 834                                            cairo_image_surface_get_width (source),
 835                                            cairo_image_surface_get_height (source),
 836                                            cairo_image_surface_get_stride (source),
 837                                            NULL,
 838                                            NULL);
 839
 840         sx = 0;
 841         sy = 0;
 842         dw = gdk_pixbuf_get_width(pixbuf);
 843         dh = gdk_pixbuf_get_height(pixbuf);
 844
 845         if (x < 0)
 846                 {
 847                 w += x;
 848                 sx = -x;
 849                 x = 0;
 850                 }
 851
 852         if (y < 0)
 853                 {
 854                 h += y;
 855                 sy = -y;
 856                 y = 0;
 857                 }
 858
 859         if (x + w > dw) w = dw - x;
 860         if (y + h > dh) h = dh - y;
 861
 862         pixbuf_copy_font(buffer, sx, sy,
 863                          pixbuf, x, y, w, h,
 864                          r, g, b, a);
 865
 866         g_object_unref(buffer);
 867         cairo_surface_destroy(source);
 868 }
 869
 870 /*
 871  *-----------------------------------------------------------------------------
 872  * pixbuf drawing (triangle)
 873  *-----------------------------------------------------------------------------
 874  */
 875
 876 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 877                         gint *rx, gint *ry, gint *rw, gint *rh)
 878 {
 879         gint tx, ty, tw, th;
 880
 881         tx = MIN(x1, x2);
 882         tx = MIN(tx, x3);
 883         ty = MIN(y1, y2);
 884         ty = MIN(ty, y3);
 885         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 886         tw = MAX(tw, abs(x3 - x1));
 887         th = MAX(abs(y1 - y2), abs(y2 - y3));
 888         th = MAX(th, abs(y3 - y1));
 889
 890         *rx = tx;
 891         *ry = ty;
 892         *rw = tw;
 893         *rh = th;
 894 }
 895
 896 void pixbuf_draw_triangle(GdkPixbuf *pb,
 897                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 898                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 899                           guint8 r, guint8 g, guint8 b, guint8 a)
 900 {
 901         gboolean has_alpha;
 902         gint pw, ph, prs;
 903         gint rx, ry, rw, rh;
 904         gint tx, ty, tw, th;
 905         gint fx1, fy1;
 906         gint fx2, fy2;
 907         gint fw, fh;
 908         guchar *p_pix;
 909         guchar *pp;
 910         gint p_step;
 911         gdouble slope1, slope2;
 912         gint slope1_x, slope1_y;
 913         gint y;
 914         gint t;
 915         gboolean middle = FALSE;
 916
 917         if (!pb) return;
 918
 919         pw = gdk_pixbuf_get_width(pb);
 920         ph = gdk_pixbuf_get_height(pb);
 921
 922         if (!util_clip_region(0, 0, pw, ph,
 923                               clip_x, clip_y, clip_w, clip_h,
 924                               &rx, &ry, &rw, &rh)) return;
 925
 926         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 927                            &tx, &ty, &tw, &th);
 928
 929         if (!util_clip_region(rx, ry, rw, rh,
 930                               tx, ty, tw, th,
 931                               &fx1, &fy1, &fw, &fh)) return;
 932         fx2 = fx1 + fw;
 933         fy2 = fy1 + fh;
 934
 935         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 936         prs = gdk_pixbuf_get_rowstride(pb);
 937         p_pix = gdk_pixbuf_get_pixels(pb);
 938
 939         p_step = (has_alpha) ? 4 : 3;
 940
 941         if (y1 > y2)
 942                 {
 943                 t = x1; x1 = x2; x2 = t;
 944                 t = y1; y1 = y2; y2 = t;
 945                 }
 946         if (y2 > y3)
 947                 {
 948                 t = x2; x2 = x3; x3 = t;
 949                 t = y2; y2 = y3; y3 = t;
 950                 }
 951         if (y1 > y2)
 952                 {
 953                 t = x1; x1 = x2; x2 = t;
 954                 t = y1; y1 = y2; y2 = t;
 955                 }
 956
 957         slope1 = (gdouble)(y2 - y1);
 958         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
 959         slope1_x = x1;
 960         slope1_y = y1;
 961         slope2 = (gdouble)(y3 - y1);
 962         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
 963
 964         for (y = fy1; y < fy2; y++)
 965                 {
 966                 gint xa, xb;
 967
 968                 if (!middle && y > y2)
 969                         {
 970                         slope1 = (gdouble)(y3 - y2);
 971                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
 972                         slope1_x = x2;
 973                         slope1_y = y2;
 974
 975                         middle = TRUE;
 976                         }
 977
 978                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
 979                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
 980
 981                 if (xa > xb)
 982                         {
 983                         t = xa; xa = xb; xb = t;
 984                         }
 985
 986                 xa = CLAMP(xa, fx1, fx2);
 987                 xb = CLAMP(xb, fx1, fx2);
 988
 989                 pp = p_pix + y * prs + xa * p_step;
 990
 991                 while (xa < xb)
 992                         {
 993                         *pp = (r * a + *pp * (256-a)) >> 8;
 994                         pp++;
 995                         *pp = (g * a + *pp * (256-a)) >> 8;
 996                         pp++;
 997                         *pp = (b * a + *pp * (256-a)) >> 8;
 998                         pp++;
 999                         if (has_alpha) pp++;
1000
1001                         xa++;
1002                         }
1003                 }
1004 }
1005
1006 /*
1007  *-----------------------------------------------------------------------------
1008  * pixbuf drawing (line)
1009  *-----------------------------------------------------------------------------
1010  */
1011
1012 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
1013                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
1014                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
1015 {
1016         gboolean flip = FALSE;
1017         gdouble d;
1018
1019         if (x1 > x2)
1020                 {
1021                 gdouble t;
1022
1023                 t = x1; x1 = x2; x2 = t;
1024                 t = y1; y1 = y2; y2 = t;
1025                 flip = TRUE;
1026                 }
1027
1028         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
1029
1030         if (y1 < y2)
1031                 {
1032                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1033                 }
1034         else
1035                 {
1036                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1037                 }
1038
1039         d = x2 - x1;
1040         if (d > 0.0)
1041                 {
1042                 gdouble slope;
1043
1044                 slope = (y2 - y1) / d;
1045                 if (x1 < clip_x)
1046                         {
1047                         y1 = y1 + slope * (clip_x - x1);
1048                         x1 = clip_x;
1049                         }
1050                 if (x2 > clip_x + clip_w)
1051                         {
1052                         y2 = y2 + slope * (clip_x + clip_w - x2);
1053                         x2 = clip_x + clip_w;
1054                         }
1055                 }
1056
1057         if (y1 < y2)
1058                 {
1059                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1060                 }
1061         else
1062                 {
1063                 gdouble t;
1064
1065                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1066
1067                 t = x1; x1 = x2; x2 = t;
1068                 t = y1; y1 = y2; y2 = t;
1069                 flip = !flip;
1070                 }
1071
1072         d = y2 - y1;
1073         if (d > 0.0)
1074                 {
1075                 gdouble slope;
1076
1077                 slope = (x2 - x1) / d;
1078                 if (y1 < clip_y)
1079                         {
1080                         x1 = x1 + slope * (clip_y - y1);
1081                         y1 = clip_y;
1082                         }
1083                 if (y2 > clip_y + clip_h)
1084                         {
1085                         x2 = x2 + slope * (clip_y + clip_h - y2);
1086                         y2 = clip_y + clip_h;
1087                         }
1088                 }
1089
1090         if (flip)
1091                 {
1092                 *rx1 = x2;
1093                 *ry1 = y2;
1094                 *rx2 = x1;
1095                 *ry2 = y1;
1096                 }
1097         else
1098                 {
1099                 *rx1 = x1;
1100                 *ry1 = y1;
1101                 *rx2 = x2;
1102                 *ry2 = y2;
1103                 }
1104
1105         return TRUE;
1106 }
1107
1108 void pixbuf_draw_line(GdkPixbuf *pb,
1109                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1110                       gint x1, gint y1, gint x2, gint y2,
1111                       guint8 r, guint8 g, guint8 b, guint8 a)
1112 {
1113         gboolean has_alpha;
1114         gint pw, ph, prs;
1115         gint rx, ry, rw, rh;
1116         gdouble rx1, ry1, rx2, ry2;
1117         guchar *p_pix;
1118         guchar *pp;
1119         gint p_step;
1120         gdouble slope;
1121         gdouble x, y;
1122         gint px, py;
1123         gint cx1, cy1, cx2, cy2;
1124
1125         if (!pb) return;
1126
1127         pw = gdk_pixbuf_get_width(pb);
1128         ph = gdk_pixbuf_get_height(pb);
1129
1130         if (!util_clip_region(0, 0, pw, ph,
1131                               clip_x, clip_y, clip_w, clip_h,
1132                               &rx, &ry, &rw, &rh)) return;
1133         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
1134                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
1135                             &rx1, &ry1, &rx2, &ry2)) return;
1136
1137         cx1 = rx;
1138         cy1 = ry;
1139         cx2 = rx + rw;
1140         cy2 = ry + rh;
1141
1142         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1143         prs = gdk_pixbuf_get_rowstride(pb);
1144         p_pix = gdk_pixbuf_get_pixels(pb);
1145
1146         p_step = (has_alpha) ? 4 : 3;
1147
1148         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1149                 {
1150                 if (rx1 > rx2)
1151                         {
1152                         gdouble t;
1153                         t = rx1; rx1 = rx2; rx2 = t;
1154                         t = ry1; ry1 = ry2; ry2 = t;
1155                         }
1156
1157                 slope = rx2 - rx1;
1158                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1159                 for (x = rx1; x < rx2; x += 1.0)
1160                         {
1161                         px = (gint)(x + 0.5);
1162                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1163
1164                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1165                                 {
1166                                 pp = p_pix + py * prs + px * p_step;
1167                                 *pp = (r * a + *pp * (256-a)) >> 8;
1168                                 pp++;
1169                                 *pp = (g * a + *pp * (256-a)) >> 8;
1170                                 pp++;
1171                                 *pp = (b * a + *pp * (256-a)) >> 8;
1172                                 }
1173                         }
1174                 }
1175         else
1176                 {
1177                 if (ry1 > ry2)
1178                         {
1179                         gdouble t;
1180                         t = rx1; rx1 = rx2; rx2 = t;
1181                         t = ry1; ry1 = ry2; ry2 = t;
1182                         }
1183
1184                 slope = ry2 - ry1;
1185                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1186                 for (y = ry1; y < ry2; y += 1.0)
1187                         {
1188                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1189                         py = (gint)(y + 0.5);
1190
1191                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1192                                 {
1193                                 pp = p_pix + py * prs + px * p_step;
1194                                 *pp = (r * a + *pp * (256-a)) >> 8;
1195                                 pp++;
1196                                 *pp = (g * a + *pp * (256-a)) >> 8;
1197                                 pp++;
1198                                 *pp = (b * a + *pp * (256-a)) >> 8;
1199                                 }
1200                         }
1201                 }
1202 }
1203
1204 /*
1205  *-----------------------------------------------------------------------------
1206  * pixbuf drawing (fades and shadows)
1207  *-----------------------------------------------------------------------------
1208  */
1209
1210 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1211                                     gint s, gboolean vertical, gint border,
1212                                     gint x1, gint y1, gint x2, gint y2,
1213                                     guint8 r, guint8 g, guint8 b, guint8 a)
1214 {
1215         guchar *pp;
1216         gint p_step;
1217         guint8 n = a;
1218         gint i, j;
1219
1220         p_step = (has_alpha) ? 4 : 3;
1221         for (j = y1; j < y2; j++)
1222                 {
1223                 pp = p_pix + j * prs + x1 * p_step;
1224                 if (!vertical) n = a - a * abs(j - s) / border;
1225                 for (i = x1; i < x2; i++)
1226                         {
1227                         if (vertical) n = a - a * abs(i - s) / border;
1228                         *pp = (r * n + *pp * (256-n)) >> 8;
1229                         pp++;
1230                         *pp = (g * n + *pp * (256-n)) >> 8;
1231                         pp++;
1232                         *pp = (b * n + *pp * (256-n)) >> 8;
1233                         pp++;
1234                         if (has_alpha) pp++;
1235                         }
1236                 }
1237 }
1238
1239 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1240                                     gint sx, gint sy, gint border,
1241                                     gint x1, gint y1, gint x2, gint y2,
1242                                     guint8 r, guint8 g, guint8 b, guint8 a)
1243 {
1244         guchar *pp;
1245         gint p_step;
1246         gint i, j;
1247
1248         p_step = (has_alpha) ? 4 : 3;
1249         for (j = y1; j < y2; j++)
1250                 {
1251                 pp = p_pix + j * prs + x1 * p_step;
1252                 for (i = x1; i < x2; i++)
1253                         {
1254                         guint8 n;
1255                         gint r;
1256
1257                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1258                         n = a - a * r / border;
1259                         *pp = (r * n + *pp * (256-n)) >> 8;
1260                         pp++;
1261                         *pp = (g * n + *pp * (256-n)) >> 8;
1262                         pp++;
1263                         *pp = (b * n + *pp * (256-n)) >> 8;
1264                         pp++;
1265                         if (has_alpha) pp++;
1266                         }
1267                 }
1268 }
1269
1270 void pixbuf_draw_shadow(GdkPixbuf *pb,
1271                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1272                         gint x, gint y, gint w, gint h, gint border,
1273                         guint8 r, guint8 g, guint8 b, guint8 a)
1274 {
1275         gint has_alpha;
1276         gint pw, ph, prs;
1277         gint rx, ry, rw, rh;
1278         gint fx, fy, fw, fh;
1279         guchar *p_pix;
1280
1281         if (!pb) return;
1282
1283         pw = gdk_pixbuf_get_width(pb);
1284         ph = gdk_pixbuf_get_height(pb);
1285
1286         if (!util_clip_region(0, 0, pw, ph,
1287                               clip_x, clip_y, clip_w, clip_h,
1288                               &rx, &ry, &rw, &rh)) return;
1289
1290         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1291         prs = gdk_pixbuf_get_rowstride(pb);
1292         p_pix = gdk_pixbuf_get_pixels(pb);
1293
1294         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1295                              rx, ry, rw, rh,
1296                              &fx, &fy, &fw, &fh))
1297                 {
1298                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1299                 }
1300
1301         if (border < 1) return;
1302
1303         if (util_clip_region(x, y + border, border, h - border * 2,
1304                              rx, ry, rw, rh,
1305                              &fx, &fy, &fw, &fh))
1306                 {
1307                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1308                                         x + border, TRUE, border,
1309                                         fx, fy, fx + fw, fy + fh,
1310                                         r, g, b, a);
1311                 }
1312         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1313                              rx, ry, rw, rh,
1314                              &fx, &fy, &fw, &fh))
1315                 {
1316                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1317                                         x + w - border, TRUE, border,
1318                                         fx, fy, fx + fw, fy + fh,
1319                                         r, g, b, a);
1320                 }
1321         if (util_clip_region(x + border, y, w - border * 2, border,
1322                              rx, ry, rw, rh,
1323                              &fx, &fy, &fw, &fh))
1324                 {
1325                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1326                                         y + border, FALSE, border,
1327                                         fx, fy, fx + fw, fy + fh,
1328                                         r, g, b, a);
1329                 }
1330         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1331                              rx, ry, rw, rh,
1332                              &fx, &fy, &fw, &fh))
1333                 {
1334                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1335                                         y + h - border, FALSE, border,
1336                                         fx, fy, fx + fw, fy + fh,
1337                                         r, g, b, a);
1338                 }
1339         if (util_clip_region(x, y, border, border,
1340                              rx, ry, rw, rh,
1341                              &fx, &fy, &fw, &fh))
1342                 {
1343                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1344                                         x + border, y + border, border,
1345                                         fx, fy, fx + fw, fy + fh,
1346                                         r, g, b, a);
1347                 }
1348         if (util_clip_region(x + w - border, y, border, border,
1349                              rx, ry, rw, rh,
1350                              &fx, &fy, &fw, &fh))
1351                 {
1352                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1353                                         x + w - border, y + border, border,
1354                                         fx, fy, fx + fw, fy + fh,
1355                                         r, g, b, a);
1356                 }
1357         if (util_clip_region(x, y + h - border, border, border,
1358                              rx, ry, rw, rh,
1359                              &fx, &fy, &fw, &fh))
1360                 {
1361                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1362                                         x + border, y + h - border, border,
1363                                         fx, fy, fx + fw, fy + fh,
1364                                         r, g, b, a);
1365                 }
1366         if (util_clip_region(x + w - border, y + h - border, border, border,
1367                              rx, ry, rw, rh,
1368                              &fx, &fy, &fw, &fh))
1369                 {
1370                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1371                                         x + w - border, y + h - border, border,
1372                                         fx, fy, fx + fw, fy + fh,
1373                                         r, g, b, a);
1374                 }
1375 }
1376
1377
1378 /*
1379  *-----------------------------------------------------------------------------
1380  * pixbuf color alterations
1381  *-----------------------------------------------------------------------------
1382  */
1383
1384 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1385                             gint x, gint y, gint w, gint h)
1386 {
1387         gboolean has_alpha;
1388         gint pw, ph, prs;
1389         guchar *p_pix;
1390         guchar *pp;
1391         gint i, j;
1392
1393         if (!pb) return;
1394
1395         pw = gdk_pixbuf_get_width(pb);
1396         ph = gdk_pixbuf_get_height(pb);
1397
1398         if (x < 0 || x + w > pw) return;
1399         if (y < 0 || y + h > ph) return;
1400
1401         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1402         prs = gdk_pixbuf_get_rowstride(pb);
1403         p_pix = gdk_pixbuf_get_pixels(pb);
1404
1405         for (i = 0; i < h; i++)
1406                 {
1407                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1408                 for (j = 0; j < w; j++)
1409                         {
1410                         guint8 grey;
1411
1412                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1413                         *pp = grey;
1414                         pp++;
1415                         *pp = grey;
1416                         pp++;
1417                         *pp = grey;
1418                         pp++;
1419                         if (has_alpha) pp++;
1420                         }
1421                 }
1422 }
1423 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */