src/pixbuf_util.c

   1 /*
   2  * Geeqie
   3  * (C) 2004 John Ellis
   4  * Copyright (C) 2008 - 2012 The Geeqie Team
   5  *
   6  * Author: John Ellis
   7  *
   8  * This software is released under the GNU General Public License (GNU GPL).
   9  * Please read the included file COPYING for more information.
  10  * This software comes with no warranty of any kind, use at your own risk!
  11  */
  12
  13
  14 #include "main.h"
  15 #include "pixbuf_util.h"
  16 #include "exif.h"
  17 #include "ui_fileops.h"
  18
  19 #include "icons/icons_inline.h"
  20
  21 #include <math.h>
  22
  23
  24 /*
  25  *-----------------------------------------------------------------------------
  26  * png save
  27  *-----------------------------------------------------------------------------
  28  */
  29
  30 gboolean pixbuf_to_file_as_png(GdkPixbuf *pixbuf, const gchar *filename)
  31 {
  32         GError *error = NULL;
  33         gboolean ret;
  34
  35         if (!pixbuf || !filename) return FALSE;
  36
  37         ret = gdk_pixbuf_save(pixbuf, filename, "png", &error,
  38                               "tEXt::Software", GQ_APPNAME " " VERSION, NULL);
  39
  40         if (error)
  41                 {
  42                 log_printf("Error saving png file: %s\n", error->message);
  43                 g_error_free(error);
  44                 }
  45
  46         return ret;
  47 }
  48
  49 /*
  50  *-----------------------------------------------------------------------------
  51  * jpeg save
  52  *-----------------------------------------------------------------------------
  53  */
  54
  55 gboolean pixbuf_to_file_as_jpg(GdkPixbuf *pixbuf, const gchar *filename, gint quality)
  56 {
  57         GError *error = NULL;
  58         gchar *qbuf;
  59         gboolean ret;
  60
  61         if (!pixbuf || !filename) return FALSE;
  62
  63         if (quality == -1) quality = 75;
  64         if (quality < 1 || quality > 100)
  65                 {
  66                 log_printf("Jpeg not saved, invalid quality %d\n", quality);
  67                 return FALSE;
  68                 }
  69
  70         qbuf = g_strdup_printf("%d", quality);
  71         ret = gdk_pixbuf_save(pixbuf, filename, "jpeg", &error, "quality", qbuf, NULL);
  72         g_free(qbuf);
  73
  74         if (error)
  75                 {
  76                 log_printf("Error saving jpeg to %s\n%s\n", filename, error->message);
  77                 g_error_free(error);
  78                 }
  79
  80         return ret;
  81 }
  82
  83 /*
  84  *-----------------------------------------------------------------------------
  85  * pixbuf from inline
  86  *-----------------------------------------------------------------------------
  87  */
  88
  89 typedef struct _PixbufInline PixbufInline;
  90 struct _PixbufInline
  91 {
  92         const gchar *key;
  93         const guint8 *data;
  94 };
  95
  96 static PixbufInline inline_pixbuf_data[] = {
  97         { PIXBUF_INLINE_FOLDER_CLOSED,  folder_closed },
  98         { PIXBUF_INLINE_FOLDER_LOCKED,  folder_locked },
  99         { PIXBUF_INLINE_FOLDER_OPEN,    folder_open },
 100         { PIXBUF_INLINE_FOLDER_UP,      folder_up },
 101         { PIXBUF_INLINE_SCROLLER,       icon_scroller },
 102         { PIXBUF_INLINE_BROKEN,         icon_broken },
 103         { PIXBUF_INLINE_ICON,           gqview_icon },
 104         { PIXBUF_INLINE_LOGO,           geeqie_logo },
 105         { PIXBUF_INLINE_ICON_FLOAT,     icon_float },
 106         { PIXBUF_INLINE_ICON_THUMB,     icon_thumb },
 107         { PIXBUF_INLINE_ICON_BOOK,      icon_book },
 108         { PIXBUF_INLINE_ICON_CONFIG,    icon_config },
 109         { PIXBUF_INLINE_ICON_TOOLS,     icon_tools },
 110         { PIXBUF_INLINE_ICON_VIEW,      icon_view },
 111         { NULL, NULL }
 112 };
 113
 114 GdkPixbuf *pixbuf_inline(const gchar *key)
 115 {
 116         gint i;
 117
 118         if (!key) return NULL;
 119
 120         i = 0;
 121         while (inline_pixbuf_data[i].key)
 122                 {
 123                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 124                         {
 125                         return gdk_pixbuf_new_from_inline(-1, inline_pixbuf_data[i].data, FALSE, NULL);
 126                         }
 127                 i++;
 128                 }
 129
 130         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 131
 132         return NULL;
 133 }
 134
 135 static void register_stock_icon(const gchar *key, GdkPixbuf *pixbuf)
 136 {
 137         static GtkIconFactory *icon_factory = NULL;
 138         GtkIconSet *icon_set;
 139
 140         if (!icon_factory)
 141                 {
 142                 icon_factory = gtk_icon_factory_new();
 143                 gtk_icon_factory_add_default(icon_factory);
 144                 }
 145
 146         icon_set = gtk_icon_set_new_from_pixbuf(pixbuf);
 147         gtk_icon_factory_add(icon_factory, key, icon_set);
 148 }
 149
 150
 151 void pixbuf_inline_register_stock_icons(void)
 152 {
 153         gint i;
 154
 155         i = 0;
 156         while (inline_pixbuf_data[i].key)
 157                 {
 158                 register_stock_icon(inline_pixbuf_data[i].key, pixbuf_inline(inline_pixbuf_data[i].key));
 159                 i++;
 160                 }
 161 }
 162
 163 gboolean register_theme_icon_as_stock(const gchar *key, const gchar *icon)
 164 {
 165         GtkIconTheme *icon_theme;
 166         GdkPixbuf *pixbuf;
 167         GError *error = NULL;
 168
 169         icon_theme = gtk_icon_theme_get_default();
 170
 171         if (gtk_icon_theme_has_icon(icon_theme, key)) return FALSE;
 172
 173         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 174                            icon, /* icon name */
 175                            64, /* size */
 176                            0,  /* flags */
 177                            &error);
 178         if (!pixbuf)
 179                 {
 180                 if (error)
 181                         {
 182                         DEBUG_1("Couldn't load icon %s: %s", icon, error->message);
 183                         g_error_free(error);
 184                         error = NULL;
 185                         }
 186
 187                 if (strchr(icon, '.'))
 188                         {
 189                         /* try again without extension */
 190                         gchar *icon2 = remove_extension_from_path(icon);
 191                         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 192                                            icon2, /* icon name */
 193                                            64, /* size */
 194                                            0,  /* flags */
 195                                            &error);
 196                         if (error)
 197                                 {
 198                                 DEBUG_1("Couldn't load icon %s: %s", icon2, error->message);
 199                                 g_error_free(error);
 200                                 }
 201                         g_free(icon2);
 202                         }
 203                 }
 204
 205         if (!pixbuf) return FALSE;
 206
 207         register_stock_icon(key, pixbuf);
 208         return TRUE;
 209 }
 210
 211 gboolean pixbuf_scale_aspect(gint req_w, gint req_h,
 212                              gint old_w, gint old_h,
 213                              gint *new_w, gint *new_h)
 214 {
 215         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 216                 {
 217                 *new_w = req_w;
 218                 *new_h = (gdouble)*new_w / old_w * old_h;
 219                 if (*new_h < 1) *new_h = 1;
 220                 }
 221         else
 222                 {
 223                 *new_h = req_h;
 224                 *new_w = (gdouble)*new_h / old_h * old_w;
 225                 if (*new_w < 1) *new_w = 1;
 226                 }
 227
 228         return (*new_w != old_w || *new_h != old_h);
 229 }
 230
 231 GdkPixbuf *pixbuf_fallback(FileData *fd, gint requested_width, gint requested_height)
 232 {
 233         GdkPixbuf *pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN); /* FIXME use different images according to FORMAT_CLASS */
 234
 235         if (requested_width && requested_height)
 236                 {
 237                 gint w = gdk_pixbuf_get_width(pixbuf);
 238                 gint h = gdk_pixbuf_get_height(pixbuf);
 239
 240                 if (w > requested_width || h > requested_height)
 241                         {
 242                         gint nw, nh;
 243
 244                         if (pixbuf_scale_aspect(requested_width, requested_height,
 245                                                           w, h, &nw, &nh))
 246                                 {
 247                                 GdkPixbuf *tmp;
 248
 249                                 tmp = pixbuf;
 250                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 251                                 g_object_unref(G_OBJECT(tmp));
 252                                 }
 253                         }
 254                 }
 255         return pixbuf;
 256 }
 257
 258
 259 /*
 260  *-----------------------------------------------------------------------------
 261  * misc utils
 262  *-----------------------------------------------------------------------------
 263  */
 264
 265 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 266                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 267                           gint *rx, gint *ry, gint *rw, gint *rh)
 268 {
 269         if (clip_x + clip_w <= x ||
 270             clip_x >= x + w ||
 271             clip_y + clip_h <= y ||
 272             clip_y >= y + h)
 273                 {
 274                 return FALSE;
 275                 }
 276
 277         *rx = MAX(x, clip_x);
 278         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 279
 280         *ry = MAX(y, clip_y);
 281         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 282
 283         return TRUE;
 284 }
 285
 286 /*
 287  *-----------------------------------------------------------------------------
 288  * pixbuf rotation
 289  *-----------------------------------------------------------------------------
 290  */
 291
 292 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 293                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 294                                      gint bytes_per_pixel, gboolean counter_clockwise)
 295 {
 296         gint i, j;
 297         guchar *sp;
 298         guchar *dp;
 299
 300         for (i = 0; i < h; i++)
 301                 {
 302                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 303                 for (j = 0; j < w; j++)
 304                         {
 305                         if (counter_clockwise)
 306                                 {
 307                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 308                                 }
 309                         else
 310                                 {
 311                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 312                                 }
 313                         *(dp++) = *(sp++);      /* r */
 314                         *(dp++) = *(sp++);      /* g */
 315                         *(dp++) = *(sp++);      /* b */
 316                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 317                         }
 318                 }
 319
 320 }
 321
 322 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 323                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 324 {
 325         gint i;
 326         guchar *sp;
 327         guchar *dp;
 328
 329         for (i = 0; i < h; i++)
 330                 {
 331                 sp = src + (i * src_row_stride);
 332                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 333                 memcpy(dp, sp, w * bytes_per_pixel);
 334                 }
 335 }
 336
 337 #define ROTATE_BUFFER_WIDTH 48
 338 #define ROTATE_BUFFER_HEIGHT 48
 339
 340 /*
 341  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 342  *
 343  */
 344 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 345 {
 346         GdkPixbuf *dest;
 347         gboolean has_alpha;
 348         gint sw, sh, srs;
 349         gint dw, dh, drs;
 350         guchar *s_pix;
 351         guchar *d_pix;
 352         gint i, j;
 353         gint a;
 354         GdkPixbuf *buffer;
 355         guchar *b_pix;
 356         gint brs;
 357         gint w, h;
 358
 359         if (!src) return NULL;
 360
 361         sw = gdk_pixbuf_get_width(src);
 362         sh = gdk_pixbuf_get_height(src);
 363         has_alpha = gdk_pixbuf_get_has_alpha(src);
 364         srs = gdk_pixbuf_get_rowstride(src);
 365         s_pix = gdk_pixbuf_get_pixels(src);
 366
 367         dw = sh;
 368         dh = sw;
 369         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 370         drs = gdk_pixbuf_get_rowstride(dest);
 371         d_pix = gdk_pixbuf_get_pixels(dest);
 372
 373         a = (has_alpha ? 4 : 3);
 374
 375         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 376                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 377         b_pix = gdk_pixbuf_get_pixels(buffer);
 378         brs = gdk_pixbuf_get_rowstride(buffer);
 379
 380         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 381                 {
 382                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 383                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 384                         {
 385                         gint x, y;
 386
 387                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 388                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 389                                                  b_pix, brs, h, w,
 390                                                  a, counter_clockwise);
 391
 392                         if (counter_clockwise)
 393                                 {
 394                                 x = i;
 395                                 y = sw - h - j;
 396                                 }
 397                         else
 398                                 {
 399                                 x = sh - w - i;
 400                                 y = j;
 401                                 }
 402                         pixbuf_copy_block(b_pix, brs, w, h,
 403                                           d_pix, drs, x, y, a);
 404                         }
 405                 }
 406
 407         g_object_unref(buffer);
 408
 409 #if 0
 410         /* this is the simple version of rotation (roughly 2-4x slower) */
 411
 412         for (i = 0; i < sh; i++)
 413                 {
 414                 sp = s_pix + (i * srs);
 415                 for (j = 0; j < sw; j++)
 416                         {
 417                         if (counter_clockwise)
 418                                 {
 419                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 420                                 }
 421                         else
 422                                 {
 423                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 424                                 }
 425
 426                         *(dp++) = *(sp++);      /* r */
 427                         *(dp++) = *(sp++);      /* g */
 428                         *(dp++) = *(sp++);      /* b */
 429                         if (has_alpha) *(dp) = *(sp++); /* a */
 430                         }
 431                 }
 432 #endif
 433
 434         return dest;
 435 }
 436
 437 /*
 438  * Returns a copy of pixbuf mirrored and or flipped.
 439  * TO do a 180 degree rotations set both mirror and flipped TRUE
 440  * if mirror and flip are FALSE, result is a simple copy.
 441  */
 442 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 443 {
 444         GdkPixbuf *dest;
 445         gboolean has_alpha;
 446         gint w, h, srs;
 447         gint drs;
 448         guchar *s_pix;
 449         guchar *d_pix;
 450         guchar *sp;
 451         guchar *dp;
 452         gint i, j;
 453         gint a;
 454
 455         if (!src) return NULL;
 456
 457         w = gdk_pixbuf_get_width(src);
 458         h = gdk_pixbuf_get_height(src);
 459         has_alpha = gdk_pixbuf_get_has_alpha(src);
 460         srs = gdk_pixbuf_get_rowstride(src);
 461         s_pix = gdk_pixbuf_get_pixels(src);
 462
 463         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 464         drs = gdk_pixbuf_get_rowstride(dest);
 465         d_pix = gdk_pixbuf_get_pixels(dest);
 466
 467         a = has_alpha ? 4 : 3;
 468
 469         for (i = 0; i < h; i++)
 470                 {
 471                 sp = s_pix + (i * srs);
 472                 if (flip)
 473                         {
 474                         dp = d_pix + ((h - i - 1) * drs);
 475                         }
 476                 else
 477                         {
 478                         dp = d_pix + (i * drs);
 479                         }
 480                 if (mirror)
 481                         {
 482                         dp += (w - 1) * a;
 483                         for (j = 0; j < w; j++)
 484                                 {
 485                                 *(dp++) = *(sp++);      /* r */
 486                                 *(dp++) = *(sp++);      /* g */
 487                                 *(dp++) = *(sp++);      /* b */
 488                                 if (has_alpha) *(dp) = *(sp++); /* a */
 489                                 dp -= (a + 3);
 490                                 }
 491                         }
 492                 else
 493                         {
 494                         for (j = 0; j < w; j++)
 495                                 {
 496                                 *(dp++) = *(sp++);      /* r */
 497                                 *(dp++) = *(sp++);      /* g */
 498                                 *(dp++) = *(sp++);      /* b */
 499                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 500                                 }
 501                         }
 502                 }
 503
 504         return dest;
 505 }
 506
 507 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 508 {
 509         GdkPixbuf *dest;
 510         GdkPixbuf *tmp = NULL;
 511
 512         switch (orientation)
 513                 {
 514                 case EXIF_ORIENTATION_TOP_LEFT:
 515                         dest = gdk_pixbuf_copy(pixbuf);
 516                         break;
 517                 case EXIF_ORIENTATION_TOP_RIGHT:
 518                         /* mirrored */
 519                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 520                         break;
 521                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 522                         /* upside down */
 523                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 524                         break;
 525                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 526                         /* flipped */
 527                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 528                         break;
 529                 case EXIF_ORIENTATION_LEFT_TOP:
 530                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 531                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 532                         break;
 533                 case EXIF_ORIENTATION_RIGHT_TOP:
 534                         /* rotated -90 (270) */
 535                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 536                         break;
 537                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 538                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 539                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 540                         break;
 541                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 542                         /* rotated 90 */
 543                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 544                         break;
 545                 default:
 546                         dest = gdk_pixbuf_copy(pixbuf);
 547                         break;
 548                 }
 549         if (tmp) g_object_unref(tmp);
 550         return dest;
 551
 552 }
 553
 554
 555 /*
 556  *-----------------------------------------------------------------------------
 557  * pixbuf drawing (rectangles)
 558  *-----------------------------------------------------------------------------
 559  */
 560
 561 /*
 562  * Fills region of pixbuf at x,y over w,h
 563  * with colors red (r), green (g), blue (b)
 564  * applying alpha (a), use a=255 for solid.
 565  */
 566 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 567                            gint x, gint y, gint w, gint h,
 568                            gint r, gint g, gint b, gint a)
 569 {
 570         gboolean has_alpha;
 571         gint pw, ph, prs;
 572         guchar *p_pix;
 573         guchar *pp;
 574         gint i, j;
 575
 576         if (!pb) return;
 577
 578         pw = gdk_pixbuf_get_width(pb);
 579         ph = gdk_pixbuf_get_height(pb);
 580
 581         if (x < 0 || x + w > pw) return;
 582         if (y < 0 || y + h > ph) return;
 583
 584         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 585         prs = gdk_pixbuf_get_rowstride(pb);
 586         p_pix = gdk_pixbuf_get_pixels(pb);
 587
 588         for (i = 0; i < h; i++)
 589                 {
 590                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 591                 for (j = 0; j < w; j++)
 592                         {
 593                         *pp = (r * a + *pp * (256-a)) >> 8;
 594                         pp++;
 595                         *pp = (g * a + *pp * (256-a)) >> 8;
 596                         pp++;
 597                         *pp = (b * a + *pp * (256-a)) >> 8;
 598                         pp++;
 599                         if (has_alpha) pp++;
 600                         }
 601                 }
 602 }
 603
 604 void pixbuf_draw_rect(GdkPixbuf *pb,
 605                       gint x, gint y, gint w, gint h,
 606                       gint r, gint g, gint b, gint a,
 607                       gint left, gint right, gint top, gint bottom)
 608 {
 609         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 610                               r, g, b ,a);
 611         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 612                               r, g, b ,a);
 613         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 614                               r, g, b ,a);
 615         pixbuf_draw_rect_fill(pb, x, y, left, h,
 616                               r, g, b ,a);
 617 }
 618
 619 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 620                           gint x, gint y, gint w, gint h,
 621                           gint r, gint g, gint b, gint a)
 622 {
 623         gboolean has_alpha;
 624         gint pw, ph, prs;
 625         guchar *p_pix;
 626         guchar *pp;
 627         gint i, j;
 628
 629         if (!pb) return;
 630
 631         pw = gdk_pixbuf_get_width(pb);
 632         ph = gdk_pixbuf_get_height(pb);
 633
 634         if (x < 0 || x + w > pw) return;
 635         if (y < 0 || y + h > ph) return;
 636
 637         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 638         prs = gdk_pixbuf_get_rowstride(pb);
 639         p_pix = gdk_pixbuf_get_pixels(pb);
 640
 641         for (i = 0; i < h; i++)
 642                 {
 643                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 644                 for (j = 0; j < w; j++)
 645                         {
 646                         *pp = r; pp++;
 647                         *pp = g; pp++;
 648                         *pp = b; pp++;
 649                         if (has_alpha) { *pp = a; pp++; }
 650                         }
 651                 }
 652 }
 653
 654 void pixbuf_set_rect(GdkPixbuf *pb,
 655                      gint x, gint y, gint w, gint h,
 656                      gint r, gint g, gint b, gint a,
 657                      gint left, gint right, gint top, gint bottom)
 658 {
 659         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 660                              r, g, b ,a);
 661         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 662                              r, g, b ,a);
 663         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 664                              r, g, b ,a);
 665         pixbuf_set_rect_fill(pb, x, y, left, h,
 666                              r, g, b ,a);
 667 }
 668
 669 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 670 {
 671         guchar *buf;
 672         gboolean has_alpha;
 673         gint rowstride;
 674         guchar *p;
 675
 676         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 677             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 678
 679         buf = gdk_pixbuf_get_pixels(pb);
 680         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 681         rowstride = gdk_pixbuf_get_rowstride(pb);
 682
 683         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 684         *p = r; p++;
 685         *p = g; p++;
 686         *p = b; p++;
 687         if (has_alpha) *p = a;
 688 }
 689
 690
 691 /*
 692  *-----------------------------------------------------------------------------
 693  * pixbuf text rendering
 694  *-----------------------------------------------------------------------------
 695  */
 696
 697 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 698                              GdkPixbuf *dest, gint dx, gint dy,
 699                              gint w, gint h,
 700                              guint8 r, guint8 g, guint8 b, guint8 a)
 701 {
 702         gint sw, sh, srs;
 703         gboolean s_alpha;
 704         gint s_step;
 705         guchar *s_pix;
 706         gint dw, dh, drs;
 707         gboolean d_alpha;
 708         gint d_step;
 709         guchar *d_pix;
 710
 711         guchar *sp;
 712         guchar *dp;
 713         gint i, j;
 714
 715         if (!src || !dest) return;
 716
 717         sw = gdk_pixbuf_get_width(src);
 718         sh = gdk_pixbuf_get_height(src);
 719
 720         if (sx < 0 || sx + w > sw) return;
 721         if (sy < 0 || sy + h > sh) return;
 722
 723         dw = gdk_pixbuf_get_width(dest);
 724         dh = gdk_pixbuf_get_height(dest);
 725
 726         if (dx < 0 || dx + w > dw) return;
 727         if (dy < 0 || dy + h > dh) return;
 728
 729         s_alpha = gdk_pixbuf_get_has_alpha(src);
 730         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 731         srs = gdk_pixbuf_get_rowstride(src);
 732         drs = gdk_pixbuf_get_rowstride(dest);
 733         s_pix = gdk_pixbuf_get_pixels(src);
 734         d_pix = gdk_pixbuf_get_pixels(dest);
 735
 736         s_step = (s_alpha) ? 4 : 3;
 737         d_step = (d_alpha) ? 4 : 3;
 738
 739         for (i = 0; i < h; i++)
 740                 {
 741                 sp = s_pix + (sy + i) * srs + sx * s_step;
 742                 dp = d_pix + (dy + i) * drs + dx * d_step;
 743                 for (j = 0; j < w; j++)
 744                         {
 745                         if (*sp)
 746                                 {
 747                                 guint8 asub;
 748
 749                                 asub = a * sp[0] / 255;
 750                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 751                                 dp++;
 752                                 asub = a * sp[1] / 255;
 753                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 754                                 dp++;
 755                                 asub = a * sp[2] / 255;
 756                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 757                                 dp++;
 758
 759                                 if (d_alpha)
 760                                         {
 761                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 762                                         dp++;
 763                                         }
 764                                 }
 765                         else
 766                                 {
 767                                 dp += d_step;
 768                                 }
 769
 770                         sp += s_step;
 771                         }
 772                 }
 773 }
 774
 775 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 776                         gint x, gint y,
 777                         guint8 r, guint8 g, guint8 b, guint8 a)
 778 {
 779         GdkPixbuf *buffer;
 780         gint w, h;
 781         gint sx, sy;
 782         gint dw, dh;
 783         cairo_surface_t *source;
 784         cairo_t *cr;
 785
 786         pango_layout_get_pixel_size(layout, &w, &h);
 787         if (w < 1 || h < 1) return;
 788
 789         source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
 790
 791         cr = cairo_create (source);
 792         cairo_set_source_rgb(cr, 0, 0, 0);
 793         cairo_rectangle (cr, 0, 0, w, h);
 794         cairo_fill (cr);
 795         cairo_set_source_rgb(cr, 1, 1, 1);
 796         pango_cairo_show_layout (cr, layout);
 797         cairo_destroy (cr);
 798
 799         buffer = gdk_pixbuf_new_from_data (cairo_image_surface_get_data (source),
 800                                            GDK_COLORSPACE_RGB,
 801                                            cairo_image_surface_get_format (source) == CAIRO_FORMAT_ARGB32,
 802                                            8,
 803                                            cairo_image_surface_get_width (source),
 804                                            cairo_image_surface_get_height (source),
 805                                            cairo_image_surface_get_stride (source),
 806                                            NULL,
 807                                            NULL);
 808
 809         sx = 0;
 810         sy = 0;
 811         dw = gdk_pixbuf_get_width(pixbuf);
 812         dh = gdk_pixbuf_get_height(pixbuf);
 813
 814         if (x < 0)
 815                 {
 816                 w += x;
 817                 sx = -x;
 818                 x = 0;
 819                 }
 820
 821         if (y < 0)
 822                 {
 823                 h += y;
 824                 sy = -y;
 825                 y = 0;
 826                 }
 827
 828         if (x + w > dw) w = dw - x;
 829         if (y + h > dh) h = dh - y;
 830
 831         pixbuf_copy_font(buffer, sx, sy,
 832                          pixbuf, x, y, w, h,
 833                          r, g, b, a);
 834
 835         g_object_unref(buffer);
 836         cairo_surface_destroy(source);
 837 }
 838
 839 /*
 840  *-----------------------------------------------------------------------------
 841  * pixbuf drawing (triangle)
 842  *-----------------------------------------------------------------------------
 843  */
 844
 845 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 846                         gint *rx, gint *ry, gint *rw, gint *rh)
 847 {
 848         gint tx, ty, tw, th;
 849
 850         tx = MIN(x1, x2);
 851         tx = MIN(tx, x3);
 852         ty = MIN(y1, y2);
 853         ty = MIN(ty, y3);
 854         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 855         tw = MAX(tw, abs(x3 - x1));
 856         th = MAX(abs(y1 - y2), abs(y2 - y3));
 857         th = MAX(th, abs(y3 - y1));
 858
 859         *rx = tx;
 860         *ry = ty;
 861         *rw = tw;
 862         *rh = th;
 863 }
 864
 865 void pixbuf_draw_triangle(GdkPixbuf *pb,
 866                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 867                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 868                           guint8 r, guint8 g, guint8 b, guint8 a)
 869 {
 870         gboolean has_alpha;
 871         gint pw, ph, prs;
 872         gint rx, ry, rw, rh;
 873         gint tx, ty, tw, th;
 874         gint fx1, fy1;
 875         gint fx2, fy2;
 876         gint fw, fh;
 877         guchar *p_pix;
 878         guchar *pp;
 879         gint p_step;
 880         gdouble slope1, slope2;
 881         gint slope1_x, slope1_y;
 882         gint y;
 883         gint t;
 884         gboolean middle = FALSE;
 885
 886         if (!pb) return;
 887
 888         pw = gdk_pixbuf_get_width(pb);
 889         ph = gdk_pixbuf_get_height(pb);
 890
 891         if (!util_clip_region(0, 0, pw, ph,
 892                               clip_x, clip_y, clip_w, clip_h,
 893                               &rx, &ry, &rw, &rh)) return;
 894
 895         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 896                            &tx, &ty, &tw, &th);
 897
 898         if (!util_clip_region(rx, ry, rw, rh,
 899                               tx, ty, tw, th,
 900                               &fx1, &fy1, &fw, &fh)) return;
 901         fx2 = fx1 + fw;
 902         fy2 = fy1 + fh;
 903
 904         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 905         prs = gdk_pixbuf_get_rowstride(pb);
 906         p_pix = gdk_pixbuf_get_pixels(pb);
 907
 908         p_step = (has_alpha) ? 4 : 3;
 909
 910         if (y1 > y2)
 911                 {
 912                 t = x1; x1 = x2; x2 = t;
 913                 t = y1; y1 = y2; y2 = t;
 914                 }
 915         if (y2 > y3)
 916                 {
 917                 t = x2; x2 = x3; x3 = t;
 918                 t = y2; y2 = y3; y3 = t;
 919                 }
 920         if (y1 > y2)
 921                 {
 922                 t = x1; x1 = x2; x2 = t;
 923                 t = y1; y1 = y2; y2 = t;
 924                 }
 925
 926         slope1 = (gdouble)(y2 - y1);
 927         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
 928         slope1_x = x1;
 929         slope1_y = y1;
 930         slope2 = (gdouble)(y3 - y1);
 931         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
 932
 933         for (y = fy1; y < fy2; y++)
 934                 {
 935                 gint xa, xb;
 936
 937                 if (!middle && y > y2)
 938                         {
 939                         slope1 = (gdouble)(y3 - y2);
 940                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
 941                         slope1_x = x2;
 942                         slope1_y = y2;
 943
 944                         middle = TRUE;
 945                         }
 946
 947                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
 948                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
 949
 950                 if (xa > xb)
 951                         {
 952                         t = xa; xa = xb; xb = t;
 953                         }
 954
 955                 xa = CLAMP(xa, fx1, fx2);
 956                 xb = CLAMP(xb, fx1, fx2);
 957
 958                 pp = p_pix + y * prs + xa * p_step;
 959
 960                 while (xa < xb)
 961                         {
 962                         *pp = (r * a + *pp * (256-a)) >> 8;
 963                         pp++;
 964                         *pp = (g * a + *pp * (256-a)) >> 8;
 965                         pp++;
 966                         *pp = (b * a + *pp * (256-a)) >> 8;
 967                         pp++;
 968                         if (has_alpha) pp++;
 969
 970                         xa++;
 971                         }
 972                 }
 973 }
 974
 975 /*
 976  *-----------------------------------------------------------------------------
 977  * pixbuf drawing (line)
 978  *-----------------------------------------------------------------------------
 979  */
 980
 981 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
 982                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
 983                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
 984 {
 985         gboolean flip = FALSE;
 986         gdouble d;
 987
 988         if (x1 > x2)
 989                 {
 990                 gdouble t;
 991
 992                 t = x1; x1 = x2; x2 = t;
 993                 t = y1; y1 = y2; y2 = t;
 994                 flip = TRUE;
 995                 }
 996
 997         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
 998
 999         if (y1 < y2)
1000                 {
1001                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1002                 }
1003         else
1004                 {
1005                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1006                 }
1007
1008         d = x2 - x1;
1009         if (d > 0.0)
1010                 {
1011                 gdouble slope;
1012
1013                 slope = (y2 - y1) / d;
1014                 if (x1 < clip_x)
1015                         {
1016                         y1 = y1 + slope * (clip_x - x1);
1017                         x1 = clip_x;
1018                         }
1019                 if (x2 > clip_x + clip_w)
1020                         {
1021                         y2 = y2 + slope * (clip_x + clip_w - x2);
1022                         x2 = clip_x + clip_w;
1023                         }
1024                 }
1025
1026         if (y1 < y2)
1027                 {
1028                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1029                 }
1030         else
1031                 {
1032                 gdouble t;
1033
1034                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1035
1036                 t = x1; x1 = x2; x2 = t;
1037                 t = y1; y1 = y2; y2 = t;
1038                 flip = !flip;
1039                 }
1040
1041         d = y2 - y1;
1042         if (d > 0.0)
1043                 {
1044                 gdouble slope;
1045
1046                 slope = (x2 - x1) / d;
1047                 if (y1 < clip_y)
1048                         {
1049                         x1 = x1 + slope * (clip_y - y1);
1050                         y1 = clip_y;
1051                         }
1052                 if (y2 > clip_y + clip_h)
1053                         {
1054                         x2 = x2 + slope * (clip_y + clip_h - y2);
1055                         y2 = clip_y + clip_h;
1056                         }
1057                 }
1058
1059         if (flip)
1060                 {
1061                 *rx1 = x2;
1062                 *ry1 = y2;
1063                 *rx2 = x1;
1064                 *ry2 = y1;
1065                 }
1066         else
1067                 {
1068                 *rx1 = x1;
1069                 *ry1 = y1;
1070                 *rx2 = x2;
1071                 *ry2 = y2;
1072                 }
1073
1074         return TRUE;
1075 }
1076
1077 void pixbuf_draw_line(GdkPixbuf *pb,
1078                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1079                       gint x1, gint y1, gint x2, gint y2,
1080                       guint8 r, guint8 g, guint8 b, guint8 a)
1081 {
1082         gboolean has_alpha;
1083         gint pw, ph, prs;
1084         gint rx, ry, rw, rh;
1085         gdouble rx1, ry1, rx2, ry2;
1086         guchar *p_pix;
1087         guchar *pp;
1088         gint p_step;
1089         gdouble slope;
1090         gdouble x, y;
1091         gint px, py;
1092         gint cx1, cy1, cx2, cy2;
1093
1094         if (!pb) return;
1095
1096         pw = gdk_pixbuf_get_width(pb);
1097         ph = gdk_pixbuf_get_height(pb);
1098
1099         if (!util_clip_region(0, 0, pw, ph,
1100                               clip_x, clip_y, clip_w, clip_h,
1101                               &rx, &ry, &rw, &rh)) return;
1102         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
1103                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
1104                             &rx1, &ry1, &rx2, &ry2)) return;
1105
1106         cx1 = rx;
1107         cy1 = ry;
1108         cx2 = rx + rw;
1109         cy2 = ry + rh;
1110
1111         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1112         prs = gdk_pixbuf_get_rowstride(pb);
1113         p_pix = gdk_pixbuf_get_pixels(pb);
1114
1115         p_step = (has_alpha) ? 4 : 3;
1116
1117         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1118                 {
1119                 if (rx1 > rx2)
1120                         {
1121                         gdouble t;
1122                         t = rx1; rx1 = rx2; rx2 = t;
1123                         t = ry1; ry1 = ry2; ry2 = t;
1124                         }
1125
1126                 slope = rx2 - rx1;
1127                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1128                 for (x = rx1; x < rx2; x += 1.0)
1129                         {
1130                         px = (gint)(x + 0.5);
1131                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1132
1133                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1134                                 {
1135                                 pp = p_pix + py * prs + px * p_step;
1136                                 *pp = (r * a + *pp * (256-a)) >> 8;
1137                                 pp++;
1138                                 *pp = (g * a + *pp * (256-a)) >> 8;
1139                                 pp++;
1140                                 *pp = (b * a + *pp * (256-a)) >> 8;
1141                                 }
1142                         }
1143                 }
1144         else
1145                 {
1146                 if (ry1 > ry2)
1147                         {
1148                         gdouble t;
1149                         t = rx1; rx1 = rx2; rx2 = t;
1150                         t = ry1; ry1 = ry2; ry2 = t;
1151                         }
1152
1153                 slope = ry2 - ry1;
1154                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1155                 for (y = ry1; y < ry2; y += 1.0)
1156                         {
1157                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1158                         py = (gint)(y + 0.5);
1159
1160                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1161                                 {
1162                                 pp = p_pix + py * prs + px * p_step;
1163                                 *pp = (r * a + *pp * (256-a)) >> 8;
1164                                 pp++;
1165                                 *pp = (g * a + *pp * (256-a)) >> 8;
1166                                 pp++;
1167                                 *pp = (b * a + *pp * (256-a)) >> 8;
1168                                 }
1169                         }
1170                 }
1171 }
1172
1173 /*
1174  *-----------------------------------------------------------------------------
1175  * pixbuf drawing (fades and shadows)
1176  *-----------------------------------------------------------------------------
1177  */
1178
1179 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1180                                     gint s, gboolean vertical, gint border,
1181                                     gint x1, gint y1, gint x2, gint y2,
1182                                     guint8 r, guint8 g, guint8 b, guint8 a)
1183 {
1184         guchar *pp;
1185         gint p_step;
1186         guint8 n = a;
1187         gint i, j;
1188
1189         p_step = (has_alpha) ? 4 : 3;
1190         for (j = y1; j < y2; j++)
1191                 {
1192                 pp = p_pix + j * prs + x1 * p_step;
1193                 if (!vertical) n = a - a * abs(j - s) / border;
1194                 for (i = x1; i < x2; i++)
1195                         {
1196                         if (vertical) n = a - a * abs(i - s) / border;
1197                         *pp = (r * n + *pp * (256-n)) >> 8;
1198                         pp++;
1199                         *pp = (g * n + *pp * (256-n)) >> 8;
1200                         pp++;
1201                         *pp = (b * n + *pp * (256-n)) >> 8;
1202                         pp++;
1203                         if (has_alpha) pp++;
1204                         }
1205                 }
1206 }
1207
1208 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1209                                     gint sx, gint sy, gint border,
1210                                     gint x1, gint y1, gint x2, gint y2,
1211                                     guint8 r, guint8 g, guint8 b, guint8 a)
1212 {
1213         guchar *pp;
1214         gint p_step;
1215         gint i, j;
1216
1217         p_step = (has_alpha) ? 4 : 3;
1218         for (j = y1; j < y2; j++)
1219                 {
1220                 pp = p_pix + j * prs + x1 * p_step;
1221                 for (i = x1; i < x2; i++)
1222                         {
1223                         guint8 n;
1224                         gint r;
1225
1226                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1227                         n = a - a * r / 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 void pixbuf_draw_shadow(GdkPixbuf *pb,
1240                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1241                         gint x, gint y, gint w, gint h, gint border,
1242                         guint8 r, guint8 g, guint8 b, guint8 a)
1243 {
1244         gint has_alpha;
1245         gint pw, ph, prs;
1246         gint rx, ry, rw, rh;
1247         gint fx, fy, fw, fh;
1248         guchar *p_pix;
1249
1250         if (!pb) return;
1251
1252         pw = gdk_pixbuf_get_width(pb);
1253         ph = gdk_pixbuf_get_height(pb);
1254
1255         if (!util_clip_region(0, 0, pw, ph,
1256                               clip_x, clip_y, clip_w, clip_h,
1257                               &rx, &ry, &rw, &rh)) return;
1258
1259         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1260         prs = gdk_pixbuf_get_rowstride(pb);
1261         p_pix = gdk_pixbuf_get_pixels(pb);
1262
1263         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1264                              rx, ry, rw, rh,
1265                              &fx, &fy, &fw, &fh))
1266                 {
1267                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1268                 }
1269
1270         if (border < 1) return;
1271
1272         if (util_clip_region(x, y + border, border, h - border * 2,
1273                              rx, ry, rw, rh,
1274                              &fx, &fy, &fw, &fh))
1275                 {
1276                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1277                                         x + border, TRUE, border,
1278                                         fx, fy, fx + fw, fy + fh,
1279                                         r, g, b, a);
1280                 }
1281         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1282                              rx, ry, rw, rh,
1283                              &fx, &fy, &fw, &fh))
1284                 {
1285                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1286                                         x + w - border, TRUE, border,
1287                                         fx, fy, fx + fw, fy + fh,
1288                                         r, g, b, a);
1289                 }
1290         if (util_clip_region(x + border, y, w - border * 2, border,
1291                              rx, ry, rw, rh,
1292                              &fx, &fy, &fw, &fh))
1293                 {
1294                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1295                                         y + border, FALSE, border,
1296                                         fx, fy, fx + fw, fy + fh,
1297                                         r, g, b, a);
1298                 }
1299         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1300                              rx, ry, rw, rh,
1301                              &fx, &fy, &fw, &fh))
1302                 {
1303                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1304                                         y + h - border, FALSE, border,
1305                                         fx, fy, fx + fw, fy + fh,
1306                                         r, g, b, a);
1307                 }
1308         if (util_clip_region(x, y, border, border,
1309                              rx, ry, rw, rh,
1310                              &fx, &fy, &fw, &fh))
1311                 {
1312                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1313                                         x + border, y + border, border,
1314                                         fx, fy, fx + fw, fy + fh,
1315                                         r, g, b, a);
1316                 }
1317         if (util_clip_region(x + w - border, y, border, border,
1318                              rx, ry, rw, rh,
1319                              &fx, &fy, &fw, &fh))
1320                 {
1321                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1322                                         x + w - border, y + border, border,
1323                                         fx, fy, fx + fw, fy + fh,
1324                                         r, g, b, a);
1325                 }
1326         if (util_clip_region(x, y + h - border, border, border,
1327                              rx, ry, rw, rh,
1328                              &fx, &fy, &fw, &fh))
1329                 {
1330                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1331                                         x + border, y + h - border, border,
1332                                         fx, fy, fx + fw, fy + fh,
1333                                         r, g, b, a);
1334                 }
1335         if (util_clip_region(x + w - border, y + h - border, border, border,
1336                              rx, ry, rw, rh,
1337                              &fx, &fy, &fw, &fh))
1338                 {
1339                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1340                                         x + w - border, y + h - border, border,
1341                                         fx, fy, fx + fw, fy + fh,
1342                                         r, g, b, a);
1343                 }
1344 }
1345
1346
1347 /*
1348  *-----------------------------------------------------------------------------
1349  * pixbuf color alterations
1350  *-----------------------------------------------------------------------------
1351  */
1352
1353 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1354                             gint x, gint y, gint w, gint h)
1355 {
1356         gboolean has_alpha;
1357         gint pw, ph, prs;
1358         guchar *p_pix;
1359         guchar *pp;
1360         gint i, j;
1361
1362         if (!pb) return;
1363
1364         pw = gdk_pixbuf_get_width(pb);
1365         ph = gdk_pixbuf_get_height(pb);
1366
1367         if (x < 0 || x + w > pw) return;
1368         if (y < 0 || y + h > ph) return;
1369
1370         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1371         prs = gdk_pixbuf_get_rowstride(pb);
1372         p_pix = gdk_pixbuf_get_pixels(pb);
1373
1374         for (i = 0; i < h; i++)
1375                 {
1376                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1377                 for (j = 0; j < w; j++)
1378                         {
1379                         guint8 grey;
1380
1381                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1382                         *pp = grey;
1383                         pp++;
1384                         *pp = grey;
1385                         pp++;
1386                         *pp = grey;
1387                         pp++;
1388                         if (has_alpha) pp++;
1389                         }
1390                 }
1391 }
1392 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */