src/pixbuf_util.c

   1 /*
   2  * Copyright (C) 2004 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: John Ellis
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include "main.h"
  23 #include "pixbuf_util.h"
  24 #include "exif.h"
  25 #include "ui_fileops.h"
  26
  27 #include "icons/icons_inline.h"
  28
  29 #include <math.h>
  30
  31
  32 /*
  33  *-----------------------------------------------------------------------------
  34  * png save
  35  *-----------------------------------------------------------------------------
  36  */
  37
  38 gboolean pixbuf_to_file_as_png(GdkPixbuf *pixbuf, const gchar *filename)
  39 {
  40         GError *error = NULL;
  41         gboolean ret;
  42
  43         if (!pixbuf || !filename) return FALSE;
  44
  45         ret = gdk_pixbuf_save(pixbuf, filename, "png", &error,
  46                               "tEXt::Software", GQ_APPNAME " " VERSION, NULL);
  47
  48         if (error)
  49                 {
  50                 log_printf("Error saving png file: %s\n", error->message);
  51                 g_error_free(error);
  52                 }
  53
  54         return ret;
  55 }
  56
  57 /*
  58  *-----------------------------------------------------------------------------
  59  * jpeg save
  60  *-----------------------------------------------------------------------------
  61  */
  62
  63 gboolean pixbuf_to_file_as_jpg(GdkPixbuf *pixbuf, const gchar *filename, gint quality)
  64 {
  65         GError *error = NULL;
  66         gchar *qbuf;
  67         gboolean ret;
  68
  69         if (!pixbuf || !filename) return FALSE;
  70
  71         if (quality == -1) quality = 75;
  72         if (quality < 1 || quality > 100)
  73                 {
  74                 log_printf("Jpeg not saved, invalid quality %d\n", quality);
  75                 return FALSE;
  76                 }
  77
  78         qbuf = g_strdup_printf("%d", quality);
  79         ret = gdk_pixbuf_save(pixbuf, filename, "jpeg", &error, "quality", qbuf, NULL);
  80         g_free(qbuf);
  81
  82         if (error)
  83                 {
  84                 log_printf("Error saving jpeg to %s\n%s\n", filename, error->message);
  85                 g_error_free(error);
  86                 }
  87
  88         return ret;
  89 }
  90
  91 /*
  92  *-----------------------------------------------------------------------------
  93  * pixbuf from inline
  94  *-----------------------------------------------------------------------------
  95  */
  96
  97 typedef struct _PixbufInline PixbufInline;
  98 struct _PixbufInline
  99 {
 100         const gchar *key;
 101         const guint8 *data;
 102 };
 103
 104 static PixbufInline inline_pixbuf_data[] = {
 105         { PIXBUF_INLINE_FOLDER_CLOSED,  folder_closed },
 106         { PIXBUF_INLINE_FOLDER_LOCKED,  folder_locked },
 107         { PIXBUF_INLINE_FOLDER_OPEN,    folder_open },
 108         { PIXBUF_INLINE_FOLDER_UP,      folder_up },
 109         { PIXBUF_INLINE_SCROLLER,       icon_scroller },
 110         { PIXBUF_INLINE_BROKEN,         icon_broken },
 111         { PIXBUF_INLINE_METADATA,       icon_metadata },
 112         { PIXBUF_INLINE_UNKNOWN,        icon_unknown },
 113         { PIXBUF_INLINE_VIDEO,          icon_video },
 114         { PIXBUF_INLINE_COLLECTION,     icon_collection },
 115         { PIXBUF_INLINE_ICON,           gqview_icon },
 116         { PIXBUF_INLINE_LOGO,           geeqie_logo },
 117         { PIXBUF_INLINE_ICON_FLOAT,     icon_float },
 118         { PIXBUF_INLINE_ICON_THUMB,     icon_thumb },
 119         { PIXBUF_INLINE_ICON_BOOK,      icon_book },
 120         { PIXBUF_INLINE_ICON_CONFIG,    icon_config },
 121         { PIXBUF_INLINE_ICON_TOOLS,     icon_tools },
 122         { PIXBUF_INLINE_ICON_VIEW,      icon_view },
 123         { PIXBUF_INLINE_ICON_GUIDELINES,        icon_guidelines },
 124         { PIXBUF_INLINE_ICON_PANORAMA,  icon_panorama },
 125         { PIXBUF_INLINE_ICON_MAINTENANCE,       icon_maintenance },
 126         { PIXBUF_INLINE_ICON_ZOOMFILLHOR,       icon_zoomfillhor },
 127         { PIXBUF_INLINE_ICON_ZOOMFILLVERT,      icon_zoomfillvert },
 128         { PIXBUF_INLINE_ICON_HIDETOOLS, icon_hidetools },
 129         { PIXBUF_INLINE_ICON_EXIF,      icon_exif },
 130         { PIXBUF_INLINE_ICON_MARKS,     icon_marks },
 131         { PIXBUF_INLINE_ICON_INFO,      icon_info },
 132         { PIXBUF_INLINE_ICON_SORT,      icon_sort },
 133         { PIXBUF_INLINE_ICON_PDF,       icon_pdf },
 134         { PIXBUF_INLINE_ICON_DRAW_RECTANGLE,    icon_draw_rectangle },
 135         { NULL, NULL }
 136 };
 137
 138 GdkPixbuf *pixbuf_inline(const gchar *key)
 139 {
 140         gint i;
 141
 142         if (!key) return NULL;
 143
 144         i = 0;
 145         while (inline_pixbuf_data[i].key)
 146                 {
 147                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 148                         {
 149                         return gdk_pixbuf_new_from_inline(-1, inline_pixbuf_data[i].data, FALSE, NULL);
 150                         }
 151                 i++;
 152                 }
 153
 154         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 155
 156         return NULL;
 157 }
 158
 159 static void register_stock_icon(const gchar *key, GdkPixbuf *pixbuf)
 160 {
 161         static GtkIconFactory *icon_factory = NULL;
 162         GtkIconSet *icon_set;
 163
 164         if (!icon_factory)
 165                 {
 166                 icon_factory = gtk_icon_factory_new();
 167                 gtk_icon_factory_add_default(icon_factory);
 168                 }
 169
 170         icon_set = gtk_icon_set_new_from_pixbuf(pixbuf);
 171         gtk_icon_factory_add(icon_factory, key, icon_set);
 172 }
 173
 174
 175 void pixbuf_inline_register_stock_icons(void)
 176 {
 177         gint i;
 178
 179         i = 0;
 180         while (inline_pixbuf_data[i].key)
 181                 {
 182                 register_stock_icon(inline_pixbuf_data[i].key, pixbuf_inline(inline_pixbuf_data[i].key));
 183                 i++;
 184                 }
 185 }
 186
 187 gboolean register_theme_icon_as_stock(const gchar *key, const gchar *icon)
 188 {
 189         GtkIconTheme *icon_theme;
 190         GdkPixbuf *pixbuf;
 191         GError *error = NULL;
 192
 193         icon_theme = gtk_icon_theme_get_default();
 194
 195         if (gtk_icon_theme_has_icon(icon_theme, key)) return FALSE;
 196
 197         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 198                            icon, /* icon name */
 199                            64, /* size */
 200                            0,  /* flags */
 201                            &error);
 202         if (!pixbuf)
 203                 {
 204                 if (error)
 205                         {
 206                         DEBUG_1("Couldn't load icon %s: %s", icon, error->message);
 207                         g_error_free(error);
 208                         error = NULL;
 209                         }
 210
 211                 if (strchr(icon, '.'))
 212                         {
 213                         /* try again without extension */
 214                         gchar *icon2 = remove_extension_from_path(icon);
 215                         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 216                                            icon2, /* icon name */
 217                                            64, /* size */
 218                                            0,  /* flags */
 219                                            &error);
 220                         if (error)
 221                                 {
 222                                 DEBUG_1("Couldn't load icon %s: %s", icon2, error->message);
 223                                 g_error_free(error);
 224                                 }
 225                         g_free(icon2);
 226                         }
 227                 }
 228
 229         if (!pixbuf) return FALSE;
 230
 231         register_stock_icon(key, pixbuf);
 232         return TRUE;
 233 }
 234
 235 gboolean pixbuf_scale_aspect(gint req_w, gint req_h,
 236                              gint old_w, gint old_h,
 237                              gint *new_w, gint *new_h)
 238 {
 239         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 240                 {
 241                 *new_w = req_w;
 242                 *new_h = (gdouble)*new_w / old_w * old_h;
 243                 if (*new_h < 1) *new_h = 1;
 244                 }
 245         else
 246                 {
 247                 *new_h = req_h;
 248                 *new_w = (gdouble)*new_h / old_h * old_w;
 249                 if (*new_w < 1) *new_w = 1;
 250                 }
 251
 252         return (*new_w != old_w || *new_h != old_h);
 253 }
 254
 255 GdkPixbuf *pixbuf_fallback(FileData *fd, gint requested_width, gint requested_height)
 256 {
 257         GdkPixbuf *pixbuf;
 258
 259         switch (fd->format_class)
 260                 {
 261                 case FORMAT_CLASS_UNKNOWN:
 262                         pixbuf = pixbuf_inline(PIXBUF_INLINE_UNKNOWN);
 263                         break;
 264                 case FORMAT_CLASS_META:
 265                         pixbuf = pixbuf_inline(PIXBUF_INLINE_METADATA);
 266                         break;
 267                 case FORMAT_CLASS_VIDEO:
 268                         pixbuf = pixbuf_inline(PIXBUF_INLINE_VIDEO);
 269                         break;
 270                 case FORMAT_CLASS_COLLECTION:
 271                         pixbuf = pixbuf_inline(PIXBUF_INLINE_COLLECTION);
 272                         break;
 273                 case FORMAT_CLASS_PDF:
 274                         pixbuf = pixbuf_inline(PIXBUF_INLINE_ICON_PDF);
 275                         break;
 276                 default:
 277                         pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 278                 }
 279
 280         if (requested_width && requested_height)
 281                 {
 282                 gint w = gdk_pixbuf_get_width(pixbuf);
 283                 gint h = gdk_pixbuf_get_height(pixbuf);
 284
 285                 if (w > requested_width || h > requested_height)
 286                         {
 287                         gint nw, nh;
 288
 289                         if (pixbuf_scale_aspect(requested_width, requested_height,
 290                                                           w, h, &nw, &nh))
 291                                 {
 292                                 GdkPixbuf *tmp;
 293
 294                                 tmp = pixbuf;
 295                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 296                                 g_object_unref(G_OBJECT(tmp));
 297                                 }
 298                         }
 299                 }
 300         return pixbuf;
 301 }
 302
 303
 304 /*
 305  *-----------------------------------------------------------------------------
 306  * misc utils
 307  *-----------------------------------------------------------------------------
 308  */
 309
 310 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 311                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 312                           gint *rx, gint *ry, gint *rw, gint *rh)
 313 {
 314         if (clip_x + clip_w <= x ||
 315             clip_x >= x + w ||
 316             clip_y + clip_h <= y ||
 317             clip_y >= y + h)
 318                 {
 319                 return FALSE;
 320                 }
 321
 322         *rx = MAX(x, clip_x);
 323         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 324
 325         *ry = MAX(y, clip_y);
 326         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 327
 328         return TRUE;
 329 }
 330
 331 /*
 332  *-----------------------------------------------------------------------------
 333  * pixbuf rotation
 334  *-----------------------------------------------------------------------------
 335  */
 336
 337 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 338                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 339                                      gint bytes_per_pixel, gboolean counter_clockwise)
 340 {
 341         gint i, j;
 342         guchar *sp;
 343         guchar *dp;
 344
 345         for (i = 0; i < h; i++)
 346                 {
 347                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 348                 for (j = 0; j < w; j++)
 349                         {
 350                         if (counter_clockwise)
 351                                 {
 352                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 353                                 }
 354                         else
 355                                 {
 356                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 357                                 }
 358                         *(dp++) = *(sp++);      /* r */
 359                         *(dp++) = *(sp++);      /* g */
 360                         *(dp++) = *(sp++);      /* b */
 361                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 362                         }
 363                 }
 364
 365 }
 366
 367 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 368                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 369 {
 370         gint i;
 371         guchar *sp;
 372         guchar *dp;
 373
 374         for (i = 0; i < h; i++)
 375                 {
 376                 sp = src + (i * src_row_stride);
 377                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 378                 memcpy(dp, sp, w * bytes_per_pixel);
 379                 }
 380 }
 381
 382 #define ROTATE_BUFFER_WIDTH 48
 383 #define ROTATE_BUFFER_HEIGHT 48
 384
 385 /*
 386  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 387  *
 388  */
 389 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 390 {
 391         GdkPixbuf *dest;
 392         gboolean has_alpha;
 393         gint sw, sh, srs;
 394         gint dw, dh, drs;
 395         guchar *s_pix;
 396         guchar *d_pix;
 397         gint i, j;
 398         gint a;
 399         GdkPixbuf *buffer;
 400         guchar *b_pix;
 401         gint brs;
 402         gint w, h;
 403
 404         if (!src) return NULL;
 405
 406         sw = gdk_pixbuf_get_width(src);
 407         sh = gdk_pixbuf_get_height(src);
 408         has_alpha = gdk_pixbuf_get_has_alpha(src);
 409         srs = gdk_pixbuf_get_rowstride(src);
 410         s_pix = gdk_pixbuf_get_pixels(src);
 411
 412         dw = sh;
 413         dh = sw;
 414         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 415         drs = gdk_pixbuf_get_rowstride(dest);
 416         d_pix = gdk_pixbuf_get_pixels(dest);
 417
 418         a = (has_alpha ? 4 : 3);
 419
 420         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 421                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 422         b_pix = gdk_pixbuf_get_pixels(buffer);
 423         brs = gdk_pixbuf_get_rowstride(buffer);
 424
 425         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 426                 {
 427                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 428                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 429                         {
 430                         gint x, y;
 431
 432                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 433                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 434                                                  b_pix, brs, h, w,
 435                                                  a, counter_clockwise);
 436
 437                         if (counter_clockwise)
 438                                 {
 439                                 x = i;
 440                                 y = sw - h - j;
 441                                 }
 442                         else
 443                                 {
 444                                 x = sh - w - i;
 445                                 y = j;
 446                                 }
 447                         pixbuf_copy_block(b_pix, brs, w, h,
 448                                           d_pix, drs, x, y, a);
 449                         }
 450                 }
 451
 452         g_object_unref(buffer);
 453
 454 #if 0
 455         /* this is the simple version of rotation (roughly 2-4x slower) */
 456
 457         for (i = 0; i < sh; i++)
 458                 {
 459                 sp = s_pix + (i * srs);
 460                 for (j = 0; j < sw; j++)
 461                         {
 462                         if (counter_clockwise)
 463                                 {
 464                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 465                                 }
 466                         else
 467                                 {
 468                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 469                                 }
 470
 471                         *(dp++) = *(sp++);      /* r */
 472                         *(dp++) = *(sp++);      /* g */
 473                         *(dp++) = *(sp++);      /* b */
 474                         if (has_alpha) *(dp) = *(sp++); /* a */
 475                         }
 476                 }
 477 #endif
 478
 479         return dest;
 480 }
 481
 482 /*
 483  * Returns a copy of pixbuf mirrored and or flipped.
 484  * TO do a 180 degree rotations set both mirror and flipped TRUE
 485  * if mirror and flip are FALSE, result is a simple copy.
 486  */
 487 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 488 {
 489         GdkPixbuf *dest;
 490         gboolean has_alpha;
 491         gint w, h, srs;
 492         gint drs;
 493         guchar *s_pix;
 494         guchar *d_pix;
 495         guchar *sp;
 496         guchar *dp;
 497         gint i, j;
 498         gint a;
 499
 500         if (!src) return NULL;
 501
 502         w = gdk_pixbuf_get_width(src);
 503         h = gdk_pixbuf_get_height(src);
 504         has_alpha = gdk_pixbuf_get_has_alpha(src);
 505         srs = gdk_pixbuf_get_rowstride(src);
 506         s_pix = gdk_pixbuf_get_pixels(src);
 507
 508         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 509         drs = gdk_pixbuf_get_rowstride(dest);
 510         d_pix = gdk_pixbuf_get_pixels(dest);
 511
 512         a = has_alpha ? 4 : 3;
 513
 514         for (i = 0; i < h; i++)
 515                 {
 516                 sp = s_pix + (i * srs);
 517                 if (flip)
 518                         {
 519                         dp = d_pix + ((h - i - 1) * drs);
 520                         }
 521                 else
 522                         {
 523                         dp = d_pix + (i * drs);
 524                         }
 525                 if (mirror)
 526                         {
 527                         dp += (w - 1) * a;
 528                         for (j = 0; j < w; j++)
 529                                 {
 530                                 *(dp++) = *(sp++);      /* r */
 531                                 *(dp++) = *(sp++);      /* g */
 532                                 *(dp++) = *(sp++);      /* b */
 533                                 if (has_alpha) *(dp) = *(sp++); /* a */
 534                                 dp -= (a + 3);
 535                                 }
 536                         }
 537                 else
 538                         {
 539                         for (j = 0; j < w; j++)
 540                                 {
 541                                 *(dp++) = *(sp++);      /* r */
 542                                 *(dp++) = *(sp++);      /* g */
 543                                 *(dp++) = *(sp++);      /* b */
 544                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 545                                 }
 546                         }
 547                 }
 548
 549         return dest;
 550 }
 551
 552 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 553 {
 554         GdkPixbuf *dest;
 555         GdkPixbuf *tmp = NULL;
 556
 557         switch (orientation)
 558                 {
 559                 case EXIF_ORIENTATION_TOP_LEFT:
 560                         dest = gdk_pixbuf_copy(pixbuf);
 561                         break;
 562                 case EXIF_ORIENTATION_TOP_RIGHT:
 563                         /* mirrored */
 564                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 565                         break;
 566                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 567                         /* upside down */
 568                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 569                         break;
 570                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 571                         /* flipped */
 572                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 573                         break;
 574                 case EXIF_ORIENTATION_LEFT_TOP:
 575                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 576                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 577                         break;
 578                 case EXIF_ORIENTATION_RIGHT_TOP:
 579                         /* rotated -90 (270) */
 580                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 581                         break;
 582                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 583                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 584                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 585                         break;
 586                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 587                         /* rotated 90 */
 588                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 589                         break;
 590                 default:
 591                         dest = gdk_pixbuf_copy(pixbuf);
 592                         break;
 593                 }
 594         if (tmp) g_object_unref(tmp);
 595         return dest;
 596
 597 }
 598
 599
 600 /*
 601  *-----------------------------------------------------------------------------
 602  * pixbuf drawing (rectangles)
 603  *-----------------------------------------------------------------------------
 604  */
 605
 606 /*
 607  * Fills region of pixbuf at x,y over w,h
 608  * with colors red (r), green (g), blue (b)
 609  * applying alpha (a), use a=255 for solid.
 610  */
 611 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 612                            gint x, gint y, gint w, gint h,
 613                            gint r, gint g, gint b, gint a)
 614 {
 615         gboolean has_alpha;
 616         gint pw, ph, prs;
 617         guchar *p_pix;
 618         guchar *pp;
 619         gint i, j;
 620
 621         if (!pb) return;
 622
 623         pw = gdk_pixbuf_get_width(pb);
 624         ph = gdk_pixbuf_get_height(pb);
 625
 626         if (x < 0 || x + w > pw) return;
 627         if (y < 0 || y + h > ph) return;
 628
 629         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 630         prs = gdk_pixbuf_get_rowstride(pb);
 631         p_pix = gdk_pixbuf_get_pixels(pb);
 632
 633         for (i = 0; i < h; i++)
 634                 {
 635                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 636                 for (j = 0; j < w; j++)
 637                         {
 638                         *pp = (r * a + *pp * (256-a)) >> 8;
 639                         pp++;
 640                         *pp = (g * a + *pp * (256-a)) >> 8;
 641                         pp++;
 642                         *pp = (b * a + *pp * (256-a)) >> 8;
 643                         pp++;
 644                         if (has_alpha) pp++;
 645                         }
 646                 }
 647 }
 648
 649 void pixbuf_draw_rect(GdkPixbuf *pb,
 650                       gint x, gint y, gint w, gint h,
 651                       gint r, gint g, gint b, gint a,
 652                       gint left, gint right, gint top, gint bottom)
 653 {
 654         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 655                               r, g, b ,a);
 656         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 657                               r, g, b ,a);
 658         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 659                               r, g, b ,a);
 660         pixbuf_draw_rect_fill(pb, x, y, left, h,
 661                               r, g, b ,a);
 662 }
 663
 664 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 665                           gint x, gint y, gint w, gint h,
 666                           gint r, gint g, gint b, gint a)
 667 {
 668         gboolean has_alpha;
 669         gint pw, ph, prs;
 670         guchar *p_pix;
 671         guchar *pp;
 672         gint i, j;
 673
 674         if (!pb) return;
 675
 676         pw = gdk_pixbuf_get_width(pb);
 677         ph = gdk_pixbuf_get_height(pb);
 678
 679         if (x < 0 || x + w > pw) return;
 680         if (y < 0 || y + h > ph) return;
 681
 682         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 683         prs = gdk_pixbuf_get_rowstride(pb);
 684         p_pix = gdk_pixbuf_get_pixels(pb);
 685
 686         for (i = 0; i < h; i++)
 687                 {
 688                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 689                 for (j = 0; j < w; j++)
 690                         {
 691                         *pp = r; pp++;
 692                         *pp = g; pp++;
 693                         *pp = b; pp++;
 694                         if (has_alpha) { *pp = a; pp++; }
 695                         }
 696                 }
 697 }
 698
 699 void pixbuf_set_rect(GdkPixbuf *pb,
 700                      gint x, gint y, gint w, gint h,
 701                      gint r, gint g, gint b, gint a,
 702                      gint left, gint right, gint top, gint bottom)
 703 {
 704         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 705                              r, g, b ,a);
 706         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 707                              r, g, b ,a);
 708         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 709                              r, g, b ,a);
 710         pixbuf_set_rect_fill(pb, x, y, left, h,
 711                              r, g, b ,a);
 712 }
 713
 714 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 715 {
 716         guchar *buf;
 717         gboolean has_alpha;
 718         gint rowstride;
 719         guchar *p;
 720
 721         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 722             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 723
 724         buf = gdk_pixbuf_get_pixels(pb);
 725         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 726         rowstride = gdk_pixbuf_get_rowstride(pb);
 727
 728         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 729         *p = r; p++;
 730         *p = g; p++;
 731         *p = b; p++;
 732         if (has_alpha) *p = a;
 733 }
 734
 735
 736 /*
 737  *-----------------------------------------------------------------------------
 738  * pixbuf text rendering
 739  *-----------------------------------------------------------------------------
 740  */
 741
 742 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 743                              GdkPixbuf *dest, gint dx, gint dy,
 744                              gint w, gint h,
 745                              guint8 r, guint8 g, guint8 b, guint8 a)
 746 {
 747         gint sw, sh, srs;
 748         gboolean s_alpha;
 749         gint s_step;
 750         guchar *s_pix;
 751         gint dw, dh, drs;
 752         gboolean d_alpha;
 753         gint d_step;
 754         guchar *d_pix;
 755
 756         guchar *sp;
 757         guchar *dp;
 758         gint i, j;
 759
 760         if (!src || !dest) return;
 761
 762         sw = gdk_pixbuf_get_width(src);
 763         sh = gdk_pixbuf_get_height(src);
 764
 765         if (sx < 0 || sx + w > sw) return;
 766         if (sy < 0 || sy + h > sh) return;
 767
 768         dw = gdk_pixbuf_get_width(dest);
 769         dh = gdk_pixbuf_get_height(dest);
 770
 771         if (dx < 0 || dx + w > dw) return;
 772         if (dy < 0 || dy + h > dh) return;
 773
 774         s_alpha = gdk_pixbuf_get_has_alpha(src);
 775         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 776         srs = gdk_pixbuf_get_rowstride(src);
 777         drs = gdk_pixbuf_get_rowstride(dest);
 778         s_pix = gdk_pixbuf_get_pixels(src);
 779         d_pix = gdk_pixbuf_get_pixels(dest);
 780
 781         s_step = (s_alpha) ? 4 : 3;
 782         d_step = (d_alpha) ? 4 : 3;
 783
 784         for (i = 0; i < h; i++)
 785                 {
 786                 sp = s_pix + (sy + i) * srs + sx * s_step;
 787                 dp = d_pix + (dy + i) * drs + dx * d_step;
 788                 for (j = 0; j < w; j++)
 789                         {
 790                         if (*sp)
 791                                 {
 792                                 guint8 asub;
 793
 794                                 asub = a * sp[0] / 255;
 795                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 796                                 dp++;
 797                                 asub = a * sp[1] / 255;
 798                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 799                                 dp++;
 800                                 asub = a * sp[2] / 255;
 801                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 802                                 dp++;
 803
 804                                 if (d_alpha)
 805                                         {
 806                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 807                                         dp++;
 808                                         }
 809                                 }
 810                         else
 811                                 {
 812                                 dp += d_step;
 813                                 }
 814
 815                         sp += s_step;
 816                         }
 817                 }
 818 }
 819
 820 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 821                         gint x, gint y,
 822                         guint8 r, guint8 g, guint8 b, guint8 a)
 823 {
 824         GdkPixbuf *buffer;
 825         gint w, h;
 826         gint sx, sy;
 827         gint dw, dh;
 828         cairo_surface_t *source;
 829         cairo_t *cr;
 830
 831         pango_layout_get_pixel_size(layout, &w, &h);
 832         if (w < 1 || h < 1) return;
 833
 834         source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
 835
 836         cr = cairo_create (source);
 837         cairo_set_source_rgb(cr, 0, 0, 0);
 838         cairo_rectangle (cr, 0, 0, w, h);
 839         cairo_fill (cr);
 840         cairo_set_source_rgb(cr, 1, 1, 1);
 841         pango_cairo_show_layout (cr, layout);
 842         cairo_destroy (cr);
 843
 844         buffer = gdk_pixbuf_new_from_data (cairo_image_surface_get_data (source),
 845                                            GDK_COLORSPACE_RGB,
 846                                            cairo_image_surface_get_format (source) == CAIRO_FORMAT_ARGB32,
 847                                            8,
 848                                            cairo_image_surface_get_width (source),
 849                                            cairo_image_surface_get_height (source),
 850                                            cairo_image_surface_get_stride (source),
 851                                            NULL,
 852                                            NULL);
 853
 854         sx = 0;
 855         sy = 0;
 856         dw = gdk_pixbuf_get_width(pixbuf);
 857         dh = gdk_pixbuf_get_height(pixbuf);
 858
 859         if (x < 0)
 860                 {
 861                 w += x;
 862                 sx = -x;
 863                 x = 0;
 864                 }
 865
 866         if (y < 0)
 867                 {
 868                 h += y;
 869                 sy = -y;
 870                 y = 0;
 871                 }
 872
 873         if (x + w > dw) w = dw - x;
 874         if (y + h > dh) h = dh - y;
 875
 876         pixbuf_copy_font(buffer, sx, sy,
 877                          pixbuf, x, y, w, h,
 878                          r, g, b, a);
 879
 880         g_object_unref(buffer);
 881         cairo_surface_destroy(source);
 882 }
 883
 884 /*
 885  *-----------------------------------------------------------------------------
 886  * pixbuf drawing (triangle)
 887  *-----------------------------------------------------------------------------
 888  */
 889
 890 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 891                         gint *rx, gint *ry, gint *rw, gint *rh)
 892 {
 893         gint tx, ty, tw, th;
 894
 895         tx = MIN(x1, x2);
 896         tx = MIN(tx, x3);
 897         ty = MIN(y1, y2);
 898         ty = MIN(ty, y3);
 899         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 900         tw = MAX(tw, abs(x3 - x1));
 901         th = MAX(abs(y1 - y2), abs(y2 - y3));
 902         th = MAX(th, abs(y3 - y1));
 903
 904         *rx = tx;
 905         *ry = ty;
 906         *rw = tw;
 907         *rh = th;
 908 }
 909
 910 void pixbuf_draw_triangle(GdkPixbuf *pb,
 911                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 912                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 913                           guint8 r, guint8 g, guint8 b, guint8 a)
 914 {
 915         gboolean has_alpha;
 916         gint pw, ph, prs;
 917         gint rx, ry, rw, rh;
 918         gint tx, ty, tw, th;
 919         gint fx1, fy1;
 920         gint fx2, fy2;
 921         gint fw, fh;
 922         guchar *p_pix;
 923         guchar *pp;
 924         gint p_step;
 925         gdouble slope1, slope2;
 926         gint slope1_x, slope1_y;
 927         gint y;
 928         gint t;
 929         gboolean middle = FALSE;
 930
 931         if (!pb) return;
 932
 933         pw = gdk_pixbuf_get_width(pb);
 934         ph = gdk_pixbuf_get_height(pb);
 935
 936         if (!util_clip_region(0, 0, pw, ph,
 937                               clip_x, clip_y, clip_w, clip_h,
 938                               &rx, &ry, &rw, &rh)) return;
 939
 940         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 941                            &tx, &ty, &tw, &th);
 942
 943         if (!util_clip_region(rx, ry, rw, rh,
 944                               tx, ty, tw, th,
 945                               &fx1, &fy1, &fw, &fh)) return;
 946         fx2 = fx1 + fw;
 947         fy2 = fy1 + fh;
 948
 949         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 950         prs = gdk_pixbuf_get_rowstride(pb);
 951         p_pix = gdk_pixbuf_get_pixels(pb);
 952
 953         p_step = (has_alpha) ? 4 : 3;
 954
 955         if (y1 > y2)
 956                 {
 957                 t = x1; x1 = x2; x2 = t;
 958                 t = y1; y1 = y2; y2 = t;
 959                 }
 960         if (y2 > y3)
 961                 {
 962                 t = x2; x2 = x3; x3 = t;
 963                 t = y2; y2 = y3; y3 = t;
 964                 }
 965         if (y1 > y2)
 966                 {
 967                 t = x1; x1 = x2; x2 = t;
 968                 t = y1; y1 = y2; y2 = t;
 969                 }
 970
 971         slope1 = (gdouble)(y2 - y1);
 972         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
 973         slope1_x = x1;
 974         slope1_y = y1;
 975         slope2 = (gdouble)(y3 - y1);
 976         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
 977
 978         for (y = fy1; y < fy2; y++)
 979                 {
 980                 gint xa, xb;
 981
 982                 if (!middle && y > y2)
 983                         {
 984                         slope1 = (gdouble)(y3 - y2);
 985                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
 986                         slope1_x = x2;
 987                         slope1_y = y2;
 988
 989                         middle = TRUE;
 990                         }
 991
 992                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
 993                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
 994
 995                 if (xa > xb)
 996                         {
 997                         t = xa; xa = xb; xb = t;
 998                         }
 999
1000                 xa = CLAMP(xa, fx1, fx2);
1001                 xb = CLAMP(xb, fx1, fx2);
1002
1003                 pp = p_pix + y * prs + xa * p_step;
1004
1005                 while (xa < xb)
1006                         {
1007                         *pp = (r * a + *pp * (256-a)) >> 8;
1008                         pp++;
1009                         *pp = (g * a + *pp * (256-a)) >> 8;
1010                         pp++;
1011                         *pp = (b * a + *pp * (256-a)) >> 8;
1012                         pp++;
1013                         if (has_alpha) pp++;
1014
1015                         xa++;
1016                         }
1017                 }
1018 }
1019
1020 /*
1021  *-----------------------------------------------------------------------------
1022  * pixbuf drawing (line)
1023  *-----------------------------------------------------------------------------
1024  */
1025
1026 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
1027                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
1028                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
1029 {
1030         gboolean flip = FALSE;
1031         gdouble d;
1032
1033         if (x1 > x2)
1034                 {
1035                 gdouble t;
1036
1037                 t = x1; x1 = x2; x2 = t;
1038                 t = y1; y1 = y2; y2 = t;
1039                 flip = TRUE;
1040                 }
1041
1042         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
1043
1044         if (y1 < y2)
1045                 {
1046                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1047                 }
1048         else
1049                 {
1050                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1051                 }
1052
1053         d = x2 - x1;
1054         if (d > 0.0)
1055                 {
1056                 gdouble slope;
1057
1058                 slope = (y2 - y1) / d;
1059                 if (x1 < clip_x)
1060                         {
1061                         y1 = y1 + slope * (clip_x - x1);
1062                         x1 = clip_x;
1063                         }
1064                 if (x2 > clip_x + clip_w)
1065                         {
1066                         y2 = y2 + slope * (clip_x + clip_w - x2);
1067                         x2 = clip_x + clip_w;
1068                         }
1069                 }
1070
1071         if (y1 < y2)
1072                 {
1073                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1074                 }
1075         else
1076                 {
1077                 gdouble t;
1078
1079                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1080
1081                 t = x1; x1 = x2; x2 = t;
1082                 t = y1; y1 = y2; y2 = t;
1083                 flip = !flip;
1084                 }
1085
1086         d = y2 - y1;
1087         if (d > 0.0)
1088                 {
1089                 gdouble slope;
1090
1091                 slope = (x2 - x1) / d;
1092                 if (y1 < clip_y)
1093                         {
1094                         x1 = x1 + slope * (clip_y - y1);
1095                         y1 = clip_y;
1096                         }
1097                 if (y2 > clip_y + clip_h)
1098                         {
1099                         x2 = x2 + slope * (clip_y + clip_h - y2);
1100                         y2 = clip_y + clip_h;
1101                         }
1102                 }
1103
1104         if (flip)
1105                 {
1106                 *rx1 = x2;
1107                 *ry1 = y2;
1108                 *rx2 = x1;
1109                 *ry2 = y1;
1110                 }
1111         else
1112                 {
1113                 *rx1 = x1;
1114                 *ry1 = y1;
1115                 *rx2 = x2;
1116                 *ry2 = y2;
1117                 }
1118
1119         return TRUE;
1120 }
1121
1122 void pixbuf_draw_line(GdkPixbuf *pb,
1123                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1124                       gint x1, gint y1, gint x2, gint y2,
1125                       guint8 r, guint8 g, guint8 b, guint8 a)
1126 {
1127         gboolean has_alpha;
1128         gint pw, ph, prs;
1129         gint rx, ry, rw, rh;
1130         gdouble rx1, ry1, rx2, ry2;
1131         guchar *p_pix;
1132         guchar *pp;
1133         gint p_step;
1134         gdouble slope;
1135         gdouble x, y;
1136         gint px, py;
1137         gint cx1, cy1, cx2, cy2;
1138
1139         if (!pb) return;
1140
1141         pw = gdk_pixbuf_get_width(pb);
1142         ph = gdk_pixbuf_get_height(pb);
1143
1144         if (!util_clip_region(0, 0, pw, ph,
1145                               clip_x, clip_y, clip_w, clip_h,
1146                               &rx, &ry, &rw, &rh)) return;
1147         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
1148                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
1149                             &rx1, &ry1, &rx2, &ry2)) return;
1150
1151         cx1 = rx;
1152         cy1 = ry;
1153         cx2 = rx + rw;
1154         cy2 = ry + rh;
1155
1156         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1157         prs = gdk_pixbuf_get_rowstride(pb);
1158         p_pix = gdk_pixbuf_get_pixels(pb);
1159
1160         p_step = (has_alpha) ? 4 : 3;
1161
1162         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1163                 {
1164                 if (rx1 > rx2)
1165                         {
1166                         gdouble t;
1167                         t = rx1; rx1 = rx2; rx2 = t;
1168                         t = ry1; ry1 = ry2; ry2 = t;
1169                         }
1170
1171                 slope = rx2 - rx1;
1172                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1173                 for (x = rx1; x < rx2; x += 1.0)
1174                         {
1175                         px = (gint)(x + 0.5);
1176                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1177
1178                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1179                                 {
1180                                 pp = p_pix + py * prs + px * p_step;
1181                                 *pp = (r * a + *pp * (256-a)) >> 8;
1182                                 pp++;
1183                                 *pp = (g * a + *pp * (256-a)) >> 8;
1184                                 pp++;
1185                                 *pp = (b * a + *pp * (256-a)) >> 8;
1186                                 }
1187                         }
1188                 }
1189         else
1190                 {
1191                 if (ry1 > ry2)
1192                         {
1193                         gdouble t;
1194                         t = rx1; rx1 = rx2; rx2 = t;
1195                         t = ry1; ry1 = ry2; ry2 = t;
1196                         }
1197
1198                 slope = ry2 - ry1;
1199                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1200                 for (y = ry1; y < ry2; y += 1.0)
1201                         {
1202                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1203                         py = (gint)(y + 0.5);
1204
1205                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1206                                 {
1207                                 pp = p_pix + py * prs + px * p_step;
1208                                 *pp = (r * a + *pp * (256-a)) >> 8;
1209                                 pp++;
1210                                 *pp = (g * a + *pp * (256-a)) >> 8;
1211                                 pp++;
1212                                 *pp = (b * a + *pp * (256-a)) >> 8;
1213                                 }
1214                         }
1215                 }
1216 }
1217
1218 /*
1219  *-----------------------------------------------------------------------------
1220  * pixbuf drawing (fades and shadows)
1221  *-----------------------------------------------------------------------------
1222  */
1223
1224 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1225                                     gint s, gboolean vertical, gint border,
1226                                     gint x1, gint y1, gint x2, gint y2,
1227                                     guint8 r, guint8 g, guint8 b, guint8 a)
1228 {
1229         guchar *pp;
1230         gint p_step;
1231         guint8 n = a;
1232         gint i, j;
1233
1234         p_step = (has_alpha) ? 4 : 3;
1235         for (j = y1; j < y2; j++)
1236                 {
1237                 pp = p_pix + j * prs + x1 * p_step;
1238                 if (!vertical) n = a - a * abs(j - s) / border;
1239                 for (i = x1; i < x2; i++)
1240                         {
1241                         if (vertical) n = a - a * abs(i - s) / border;
1242                         *pp = (r * n + *pp * (256-n)) >> 8;
1243                         pp++;
1244                         *pp = (g * n + *pp * (256-n)) >> 8;
1245                         pp++;
1246                         *pp = (b * n + *pp * (256-n)) >> 8;
1247                         pp++;
1248                         if (has_alpha) pp++;
1249                         }
1250                 }
1251 }
1252
1253 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1254                                     gint sx, gint sy, gint border,
1255                                     gint x1, gint y1, gint x2, gint y2,
1256                                     guint8 r, guint8 g, guint8 b, guint8 a)
1257 {
1258         guchar *pp;
1259         gint p_step;
1260         gint i, j;
1261
1262         p_step = (has_alpha) ? 4 : 3;
1263         for (j = y1; j < y2; j++)
1264                 {
1265                 pp = p_pix + j * prs + x1 * p_step;
1266                 for (i = x1; i < x2; i++)
1267                         {
1268                         guint8 n;
1269                         gint r;
1270
1271                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1272                         n = a - a * r / border;
1273                         *pp = (r * n + *pp * (256-n)) >> 8;
1274                         pp++;
1275                         *pp = (g * n + *pp * (256-n)) >> 8;
1276                         pp++;
1277                         *pp = (b * n + *pp * (256-n)) >> 8;
1278                         pp++;
1279                         if (has_alpha) pp++;
1280                         }
1281                 }
1282 }
1283
1284 void pixbuf_draw_shadow(GdkPixbuf *pb,
1285                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1286                         gint x, gint y, gint w, gint h, gint border,
1287                         guint8 r, guint8 g, guint8 b, guint8 a)
1288 {
1289         gint has_alpha;
1290         gint pw, ph, prs;
1291         gint rx, ry, rw, rh;
1292         gint fx, fy, fw, fh;
1293         guchar *p_pix;
1294
1295         if (!pb) return;
1296
1297         pw = gdk_pixbuf_get_width(pb);
1298         ph = gdk_pixbuf_get_height(pb);
1299
1300         if (!util_clip_region(0, 0, pw, ph,
1301                               clip_x, clip_y, clip_w, clip_h,
1302                               &rx, &ry, &rw, &rh)) return;
1303
1304         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1305         prs = gdk_pixbuf_get_rowstride(pb);
1306         p_pix = gdk_pixbuf_get_pixels(pb);
1307
1308         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1309                              rx, ry, rw, rh,
1310                              &fx, &fy, &fw, &fh))
1311                 {
1312                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1313                 }
1314
1315         if (border < 1) return;
1316
1317         if (util_clip_region(x, y + border, border, h - border * 2,
1318                              rx, ry, rw, rh,
1319                              &fx, &fy, &fw, &fh))
1320                 {
1321                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1322                                         x + border, TRUE, border,
1323                                         fx, fy, fx + fw, fy + fh,
1324                                         r, g, b, a);
1325                 }
1326         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1327                              rx, ry, rw, rh,
1328                              &fx, &fy, &fw, &fh))
1329                 {
1330                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1331                                         x + w - border, TRUE, border,
1332                                         fx, fy, fx + fw, fy + fh,
1333                                         r, g, b, a);
1334                 }
1335         if (util_clip_region(x + border, y, w - border * 2, border,
1336                              rx, ry, rw, rh,
1337                              &fx, &fy, &fw, &fh))
1338                 {
1339                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1340                                         y + border, FALSE, border,
1341                                         fx, fy, fx + fw, fy + fh,
1342                                         r, g, b, a);
1343                 }
1344         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1345                              rx, ry, rw, rh,
1346                              &fx, &fy, &fw, &fh))
1347                 {
1348                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1349                                         y + h - border, FALSE, border,
1350                                         fx, fy, fx + fw, fy + fh,
1351                                         r, g, b, a);
1352                 }
1353         if (util_clip_region(x, y, border, border,
1354                              rx, ry, rw, rh,
1355                              &fx, &fy, &fw, &fh))
1356                 {
1357                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1358                                         x + border, y + border, border,
1359                                         fx, fy, fx + fw, fy + fh,
1360                                         r, g, b, a);
1361                 }
1362         if (util_clip_region(x + w - border, y, border, border,
1363                              rx, ry, rw, rh,
1364                              &fx, &fy, &fw, &fh))
1365                 {
1366                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1367                                         x + w - border, y + border, border,
1368                                         fx, fy, fx + fw, fy + fh,
1369                                         r, g, b, a);
1370                 }
1371         if (util_clip_region(x, y + h - border, border, border,
1372                              rx, ry, rw, rh,
1373                              &fx, &fy, &fw, &fh))
1374                 {
1375                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1376                                         x + border, y + h - border, border,
1377                                         fx, fy, fx + fw, fy + fh,
1378                                         r, g, b, a);
1379                 }
1380         if (util_clip_region(x + w - border, y + h - border, border, border,
1381                              rx, ry, rw, rh,
1382                              &fx, &fy, &fw, &fh))
1383                 {
1384                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1385                                         x + w - border, y + h - border, border,
1386                                         fx, fy, fx + fw, fy + fh,
1387                                         r, g, b, a);
1388                 }
1389 }
1390
1391
1392 /*
1393  *-----------------------------------------------------------------------------
1394  * pixbuf color alterations
1395  *-----------------------------------------------------------------------------
1396  */
1397
1398 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1399                             gint x, gint y, gint w, gint h)
1400 {
1401         gboolean has_alpha;
1402         gint pw, ph, prs;
1403         guchar *p_pix;
1404         guchar *pp;
1405         gint i, j;
1406
1407         if (!pb) return;
1408
1409         pw = gdk_pixbuf_get_width(pb);
1410         ph = gdk_pixbuf_get_height(pb);
1411
1412         if (x < 0 || x + w > pw) return;
1413         if (y < 0 || y + h > ph) return;
1414
1415         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1416         prs = gdk_pixbuf_get_rowstride(pb);
1417         p_pix = gdk_pixbuf_get_pixels(pb);
1418
1419         for (i = 0; i < h; i++)
1420                 {
1421                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1422                 for (j = 0; j < w; j++)
1423                         {
1424                         guint8 grey;
1425
1426                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1427                         *pp = grey;
1428                         pp++;
1429                         *pp = grey;
1430                         pp++;
1431                         *pp = grey;
1432                         pp++;
1433                         if (has_alpha) pp++;
1434                         }
1435                 }
1436 }
1437 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */