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