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