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         { PIXBUF_INLINE_ICON_MOVE,      icon_move },
 136         { PIXBUF_INLINE_ICON_RENAME,    icon_rename },
 137         { PIXBUF_INLINE_ICON_SELECT_ALL,        icon_select_all },
 138         { PIXBUF_INLINE_ICON_SELECT_NONE,       icon_select_none },
 139         { PIXBUF_INLINE_ICON_SELECT_INVERT,     icon_select_invert },
 140         { PIXBUF_INLINE_ICON_SELECT_RECTANGLE,  icon_select_rectangle },
 141         { NULL, NULL }
 142 };
 143
 144 GdkPixbuf *pixbuf_inline(const gchar *key)
 145 {
 146         gint i;
 147
 148         if (!key) return NULL;
 149
 150         i = 0;
 151         while (inline_pixbuf_data[i].key)
 152                 {
 153                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 154                         {
 155                         return gdk_pixbuf_new_from_inline(-1, inline_pixbuf_data[i].data, FALSE, NULL);
 156                         }
 157                 i++;
 158                 }
 159
 160         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 161
 162         return NULL;
 163 }
 164
 165 static void register_stock_icon(const gchar *key, GdkPixbuf *pixbuf)
 166 {
 167         static GtkIconFactory *icon_factory = NULL;
 168         GtkIconSet *icon_set;
 169
 170         if (!icon_factory)
 171                 {
 172                 icon_factory = gtk_icon_factory_new();
 173                 gtk_icon_factory_add_default(icon_factory);
 174                 }
 175
 176         icon_set = gtk_icon_set_new_from_pixbuf(pixbuf);
 177         gtk_icon_factory_add(icon_factory, key, icon_set);
 178 }
 179
 180
 181 void pixbuf_inline_register_stock_icons(void)
 182 {
 183         gint i;
 184
 185         i = 0;
 186         while (inline_pixbuf_data[i].key)
 187                 {
 188                 register_stock_icon(inline_pixbuf_data[i].key, pixbuf_inline(inline_pixbuf_data[i].key));
 189                 i++;
 190                 }
 191 }
 192
 193 gboolean register_theme_icon_as_stock(const gchar *key, const gchar *icon)
 194 {
 195         GtkIconTheme *icon_theme;
 196         GdkPixbuf *pixbuf;
 197         GError *error = NULL;
 198
 199         icon_theme = gtk_icon_theme_get_default();
 200
 201         if (gtk_icon_theme_has_icon(icon_theme, key)) return FALSE;
 202
 203         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 204                            icon, /* icon name */
 205                            64, /* size */
 206                            0,  /* flags */
 207                            &error);
 208         if (!pixbuf)
 209                 {
 210                 if (error)
 211                         {
 212                         DEBUG_1("Couldn't load icon %s: %s", icon, error->message);
 213                         g_error_free(error);
 214                         error = NULL;
 215                         }
 216
 217                 if (strchr(icon, '.'))
 218                         {
 219                         /* try again without extension */
 220                         gchar *icon2 = remove_extension_from_path(icon);
 221                         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 222                                            icon2, /* icon name */
 223                                            64, /* size */
 224                                            0,  /* flags */
 225                                            &error);
 226                         if (error)
 227                                 {
 228                                 DEBUG_1("Couldn't load icon %s: %s", icon2, error->message);
 229                                 g_error_free(error);
 230                                 }
 231                         g_free(icon2);
 232                         }
 233                 }
 234
 235         if (!pixbuf) return FALSE;
 236
 237         register_stock_icon(key, pixbuf);
 238         return TRUE;
 239 }
 240
 241 gboolean pixbuf_scale_aspect(gint req_w, gint req_h,
 242                              gint old_w, gint old_h,
 243                              gint *new_w, gint *new_h)
 244 {
 245         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 246                 {
 247                 *new_w = req_w;
 248                 *new_h = (gdouble)*new_w / old_w * old_h;
 249                 if (*new_h < 1) *new_h = 1;
 250                 }
 251         else
 252                 {
 253                 *new_h = req_h;
 254                 *new_w = (gdouble)*new_h / old_h * old_w;
 255                 if (*new_w < 1) *new_w = 1;
 256                 }
 257
 258         return (*new_w != old_w || *new_h != old_h);
 259 }
 260
 261 GdkPixbuf *pixbuf_fallback(FileData *fd, gint requested_width, gint requested_height)
 262 {
 263         GdkPixbuf *pixbuf;
 264
 265         switch (fd->format_class)
 266                 {
 267                 case FORMAT_CLASS_UNKNOWN:
 268                         pixbuf = pixbuf_inline(PIXBUF_INLINE_UNKNOWN);
 269                         break;
 270                 case FORMAT_CLASS_META:
 271                         pixbuf = pixbuf_inline(PIXBUF_INLINE_METADATA);
 272                         break;
 273                 case FORMAT_CLASS_VIDEO:
 274                         pixbuf = pixbuf_inline(PIXBUF_INLINE_VIDEO);
 275                         break;
 276                 case FORMAT_CLASS_COLLECTION:
 277                         pixbuf = pixbuf_inline(PIXBUF_INLINE_COLLECTION);
 278                         break;
 279                 case FORMAT_CLASS_PDF:
 280                         pixbuf = pixbuf_inline(PIXBUF_INLINE_ICON_PDF);
 281                         break;
 282                 default:
 283                         pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 284                 }
 285
 286         if (requested_width && requested_height)
 287                 {
 288                 gint w = gdk_pixbuf_get_width(pixbuf);
 289                 gint h = gdk_pixbuf_get_height(pixbuf);
 290
 291                 if (w > requested_width || h > requested_height)
 292                         {
 293                         gint nw, nh;
 294
 295                         if (pixbuf_scale_aspect(requested_width, requested_height,
 296                                                           w, h, &nw, &nh))
 297                                 {
 298                                 GdkPixbuf *tmp;
 299
 300                                 tmp = pixbuf;
 301                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 302                                 g_object_unref(G_OBJECT(tmp));
 303                                 }
 304                         }
 305                 }
 306         return pixbuf;
 307 }
 308
 309
 310 /*
 311  *-----------------------------------------------------------------------------
 312  * misc utils
 313  *-----------------------------------------------------------------------------
 314  */
 315
 316 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 317                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 318                           gint *rx, gint *ry, gint *rw, gint *rh)
 319 {
 320         if (clip_x + clip_w <= x ||
 321             clip_x >= x + w ||
 322             clip_y + clip_h <= y ||
 323             clip_y >= y + h)
 324                 {
 325                 return FALSE;
 326                 }
 327
 328         *rx = MAX(x, clip_x);
 329         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 330
 331         *ry = MAX(y, clip_y);
 332         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 333
 334         return TRUE;
 335 }
 336
 337 /*
 338  *-----------------------------------------------------------------------------
 339  * pixbuf rotation
 340  *-----------------------------------------------------------------------------
 341  */
 342
 343 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 344                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 345                                      gint bytes_per_pixel, gboolean counter_clockwise)
 346 {
 347         gint i, j;
 348         guchar *sp;
 349         guchar *dp;
 350
 351         for (i = 0; i < h; i++)
 352                 {
 353                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 354                 for (j = 0; j < w; j++)
 355                         {
 356                         if (counter_clockwise)
 357                                 {
 358                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 359                                 }
 360                         else
 361                                 {
 362                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 363                                 }
 364                         *(dp++) = *(sp++);      /* r */
 365                         *(dp++) = *(sp++);      /* g */
 366                         *(dp++) = *(sp++);      /* b */
 367                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 368                         }
 369                 }
 370
 371 }
 372
 373 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 374                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 375 {
 376         gint i;
 377         guchar *sp;
 378         guchar *dp;
 379
 380         for (i = 0; i < h; i++)
 381                 {
 382                 sp = src + (i * src_row_stride);
 383                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 384                 memcpy(dp, sp, w * bytes_per_pixel);
 385                 }
 386 }
 387
 388 #define ROTATE_BUFFER_WIDTH 48
 389 #define ROTATE_BUFFER_HEIGHT 48
 390
 391 /*
 392  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 393  *
 394  */
 395 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 396 {
 397         GdkPixbuf *dest;
 398         gboolean has_alpha;
 399         gint sw, sh, srs;
 400         gint dw, dh, drs;
 401         guchar *s_pix;
 402         guchar *d_pix;
 403         gint i, j;
 404         gint a;
 405         GdkPixbuf *buffer;
 406         guchar *b_pix;
 407         gint brs;
 408         gint w, h;
 409
 410         if (!src) return NULL;
 411
 412         sw = gdk_pixbuf_get_width(src);
 413         sh = gdk_pixbuf_get_height(src);
 414         has_alpha = gdk_pixbuf_get_has_alpha(src);
 415         srs = gdk_pixbuf_get_rowstride(src);
 416         s_pix = gdk_pixbuf_get_pixels(src);
 417
 418         dw = sh;
 419         dh = sw;
 420         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 421         drs = gdk_pixbuf_get_rowstride(dest);
 422         d_pix = gdk_pixbuf_get_pixels(dest);
 423
 424         a = (has_alpha ? 4 : 3);
 425
 426         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 427                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 428         b_pix = gdk_pixbuf_get_pixels(buffer);
 429         brs = gdk_pixbuf_get_rowstride(buffer);
 430
 431         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 432                 {
 433                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 434                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 435                         {
 436                         gint x, y;
 437
 438                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 439                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 440                                                  b_pix, brs, h, w,
 441                                                  a, counter_clockwise);
 442
 443                         if (counter_clockwise)
 444                                 {
 445                                 x = i;
 446                                 y = sw - h - j;
 447                                 }
 448                         else
 449                                 {
 450                                 x = sh - w - i;
 451                                 y = j;
 452                                 }
 453                         pixbuf_copy_block(b_pix, brs, w, h,
 454                                           d_pix, drs, x, y, a);
 455                         }
 456                 }
 457
 458         g_object_unref(buffer);
 459
 460 #if 0
 461         /* this is the simple version of rotation (roughly 2-4x slower) */
 462
 463         for (i = 0; i < sh; i++)
 464                 {
 465                 sp = s_pix + (i * srs);
 466                 for (j = 0; j < sw; j++)
 467                         {
 468                         if (counter_clockwise)
 469                                 {
 470                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 471                                 }
 472                         else
 473                                 {
 474                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 475                                 }
 476
 477                         *(dp++) = *(sp++);      /* r */
 478                         *(dp++) = *(sp++);      /* g */
 479                         *(dp++) = *(sp++);      /* b */
 480                         if (has_alpha) *(dp) = *(sp++); /* a */
 481                         }
 482                 }
 483 #endif
 484
 485         return dest;
 486 }
 487
 488 /*
 489  * Returns a copy of pixbuf mirrored and or flipped.
 490  * TO do a 180 degree rotations set both mirror and flipped TRUE
 491  * if mirror and flip are FALSE, result is a simple copy.
 492  */
 493 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 494 {
 495         GdkPixbuf *dest;
 496         gboolean has_alpha;
 497         gint w, h, srs;
 498         gint drs;
 499         guchar *s_pix;
 500         guchar *d_pix;
 501         guchar *sp;
 502         guchar *dp;
 503         gint i, j;
 504         gint a;
 505
 506         if (!src) return NULL;
 507
 508         w = gdk_pixbuf_get_width(src);
 509         h = gdk_pixbuf_get_height(src);
 510         has_alpha = gdk_pixbuf_get_has_alpha(src);
 511         srs = gdk_pixbuf_get_rowstride(src);
 512         s_pix = gdk_pixbuf_get_pixels(src);
 513
 514         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 515         drs = gdk_pixbuf_get_rowstride(dest);
 516         d_pix = gdk_pixbuf_get_pixels(dest);
 517
 518         a = has_alpha ? 4 : 3;
 519
 520         for (i = 0; i < h; i++)
 521                 {
 522                 sp = s_pix + (i * srs);
 523                 if (flip)
 524                         {
 525                         dp = d_pix + ((h - i - 1) * drs);
 526                         }
 527                 else
 528                         {
 529                         dp = d_pix + (i * drs);
 530                         }
 531                 if (mirror)
 532                         {
 533                         dp += (w - 1) * a;
 534                         for (j = 0; j < w; j++)
 535                                 {
 536                                 *(dp++) = *(sp++);      /* r */
 537                                 *(dp++) = *(sp++);      /* g */
 538                                 *(dp++) = *(sp++);      /* b */
 539                                 if (has_alpha) *(dp) = *(sp++); /* a */
 540                                 dp -= (a + 3);
 541                                 }
 542                         }
 543                 else
 544                         {
 545                         for (j = 0; j < w; j++)
 546                                 {
 547                                 *(dp++) = *(sp++);      /* r */
 548                                 *(dp++) = *(sp++);      /* g */
 549                                 *(dp++) = *(sp++);      /* b */
 550                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 551                                 }
 552                         }
 553                 }
 554
 555         return dest;
 556 }
 557
 558 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 559 {
 560         GdkPixbuf *dest;
 561         GdkPixbuf *tmp = NULL;
 562
 563         switch (orientation)
 564                 {
 565                 case EXIF_ORIENTATION_TOP_LEFT:
 566                         dest = gdk_pixbuf_copy(pixbuf);
 567                         break;
 568                 case EXIF_ORIENTATION_TOP_RIGHT:
 569                         /* mirrored */
 570                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 571                         break;
 572                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 573                         /* upside down */
 574                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 575                         break;
 576                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 577                         /* flipped */
 578                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 579                         break;
 580                 case EXIF_ORIENTATION_LEFT_TOP:
 581                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 582                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 583                         break;
 584                 case EXIF_ORIENTATION_RIGHT_TOP:
 585                         /* rotated -90 (270) */
 586                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 587                         break;
 588                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 589                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 590                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 591                         break;
 592                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 593                         /* rotated 90 */
 594                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 595                         break;
 596                 default:
 597                         dest = gdk_pixbuf_copy(pixbuf);
 598                         break;
 599                 }
 600         if (tmp) g_object_unref(tmp);
 601         return dest;
 602
 603 }
 604
 605
 606 /*
 607  *-----------------------------------------------------------------------------
 608  * pixbuf drawing (rectangles)
 609  *-----------------------------------------------------------------------------
 610  */
 611
 612 /*
 613  * Fills region of pixbuf at x,y over w,h
 614  * with colors red (r), green (g), blue (b)
 615  * applying alpha (a), use a=255 for solid.
 616  */
 617 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 618                            gint x, gint y, gint w, gint h,
 619                            gint r, gint g, gint b, gint a)
 620 {
 621         gboolean has_alpha;
 622         gint pw, ph, prs;
 623         guchar *p_pix;
 624         guchar *pp;
 625         gint i, j;
 626
 627         if (!pb) return;
 628
 629         pw = gdk_pixbuf_get_width(pb);
 630         ph = gdk_pixbuf_get_height(pb);
 631
 632         if (x < 0 || x + w > pw) return;
 633         if (y < 0 || y + h > ph) return;
 634
 635         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 636         prs = gdk_pixbuf_get_rowstride(pb);
 637         p_pix = gdk_pixbuf_get_pixels(pb);
 638
 639         for (i = 0; i < h; i++)
 640                 {
 641                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 642                 for (j = 0; j < w; j++)
 643                         {
 644                         *pp = (r * a + *pp * (256-a)) >> 8;
 645                         pp++;
 646                         *pp = (g * a + *pp * (256-a)) >> 8;
 647                         pp++;
 648                         *pp = (b * a + *pp * (256-a)) >> 8;
 649                         pp++;
 650                         if (has_alpha) pp++;
 651                         }
 652                 }
 653 }
 654
 655 void pixbuf_draw_rect(GdkPixbuf *pb,
 656                       gint x, gint y, gint w, gint h,
 657                       gint r, gint g, gint b, gint a,
 658                       gint left, gint right, gint top, gint bottom)
 659 {
 660         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 661                               r, g, b ,a);
 662         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 663                               r, g, b ,a);
 664         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 665                               r, g, b ,a);
 666         pixbuf_draw_rect_fill(pb, x, y, left, h,
 667                               r, g, b ,a);
 668 }
 669
 670 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 671                           gint x, gint y, gint w, gint h,
 672                           gint r, gint g, gint b, gint a)
 673 {
 674         gboolean has_alpha;
 675         gint pw, ph, prs;
 676         guchar *p_pix;
 677         guchar *pp;
 678         gint i, j;
 679
 680         if (!pb) return;
 681
 682         pw = gdk_pixbuf_get_width(pb);
 683         ph = gdk_pixbuf_get_height(pb);
 684
 685         if (x < 0 || x + w > pw) return;
 686         if (y < 0 || y + h > ph) return;
 687
 688         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 689         prs = gdk_pixbuf_get_rowstride(pb);
 690         p_pix = gdk_pixbuf_get_pixels(pb);
 691
 692         for (i = 0; i < h; i++)
 693                 {
 694                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 695                 for (j = 0; j < w; j++)
 696                         {
 697                         *pp = r; pp++;
 698                         *pp = g; pp++;
 699                         *pp = b; pp++;
 700                         if (has_alpha) { *pp = a; pp++; }
 701                         }
 702                 }
 703 }
 704
 705 void pixbuf_set_rect(GdkPixbuf *pb,
 706                      gint x, gint y, gint w, gint h,
 707                      gint r, gint g, gint b, gint a,
 708                      gint left, gint right, gint top, gint bottom)
 709 {
 710         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 711                              r, g, b ,a);
 712         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 713                              r, g, b ,a);
 714         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 715                              r, g, b ,a);
 716         pixbuf_set_rect_fill(pb, x, y, left, h,
 717                              r, g, b ,a);
 718 }
 719
 720 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 721 {
 722         guchar *buf;
 723         gboolean has_alpha;
 724         gint rowstride;
 725         guchar *p;
 726
 727         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 728             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 729
 730         buf = gdk_pixbuf_get_pixels(pb);
 731         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 732         rowstride = gdk_pixbuf_get_rowstride(pb);
 733
 734         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 735         *p = r; p++;
 736         *p = g; p++;
 737         *p = b; p++;
 738         if (has_alpha) *p = a;
 739 }
 740
 741
 742 /*
 743  *-----------------------------------------------------------------------------
 744  * pixbuf text rendering
 745  *-----------------------------------------------------------------------------
 746  */
 747
 748 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 749                              GdkPixbuf *dest, gint dx, gint dy,
 750                              gint w, gint h,
 751                              guint8 r, guint8 g, guint8 b, guint8 a)
 752 {
 753         gint sw, sh, srs;
 754         gboolean s_alpha;
 755         gint s_step;
 756         guchar *s_pix;
 757         gint dw, dh, drs;
 758         gboolean d_alpha;
 759         gint d_step;
 760         guchar *d_pix;
 761
 762         guchar *sp;
 763         guchar *dp;
 764         gint i, j;
 765
 766         if (!src || !dest) return;
 767
 768         sw = gdk_pixbuf_get_width(src);
 769         sh = gdk_pixbuf_get_height(src);
 770
 771         if (sx < 0 || sx + w > sw) return;
 772         if (sy < 0 || sy + h > sh) return;
 773
 774         dw = gdk_pixbuf_get_width(dest);
 775         dh = gdk_pixbuf_get_height(dest);
 776
 777         if (dx < 0 || dx + w > dw) return;
 778         if (dy < 0 || dy + h > dh) return;
 779
 780         s_alpha = gdk_pixbuf_get_has_alpha(src);
 781         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 782         srs = gdk_pixbuf_get_rowstride(src);
 783         drs = gdk_pixbuf_get_rowstride(dest);
 784         s_pix = gdk_pixbuf_get_pixels(src);
 785         d_pix = gdk_pixbuf_get_pixels(dest);
 786
 787         s_step = (s_alpha) ? 4 : 3;
 788         d_step = (d_alpha) ? 4 : 3;
 789
 790         for (i = 0; i < h; i++)
 791                 {
 792                 sp = s_pix + (sy + i) * srs + sx * s_step;
 793                 dp = d_pix + (dy + i) * drs + dx * d_step;
 794                 for (j = 0; j < w; j++)
 795                         {
 796                         if (*sp)
 797                                 {
 798                                 guint8 asub;
 799
 800                                 asub = a * sp[0] / 255;
 801                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 802                                 dp++;
 803                                 asub = a * sp[1] / 255;
 804                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 805                                 dp++;
 806                                 asub = a * sp[2] / 255;
 807                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 808                                 dp++;
 809
 810                                 if (d_alpha)
 811                                         {
 812                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 813                                         dp++;
 814                                         }
 815                                 }
 816                         else
 817                                 {
 818                                 dp += d_step;
 819                                 }
 820
 821                         sp += s_step;
 822                         }
 823                 }
 824 }
 825
 826 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 827                         gint x, gint y,
 828                         guint8 r, guint8 g, guint8 b, guint8 a)
 829 {
 830         GdkPixbuf *buffer;
 831         gint w, h;
 832         gint sx, sy;
 833         gint dw, dh;
 834         cairo_surface_t *source;
 835         cairo_t *cr;
 836
 837         pango_layout_get_pixel_size(layout, &w, &h);
 838         if (w < 1 || h < 1) return;
 839
 840         source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
 841
 842         cr = cairo_create (source);
 843         cairo_set_source_rgb(cr, 0, 0, 0);
 844         cairo_rectangle (cr, 0, 0, w, h);
 845         cairo_fill (cr);
 846         cairo_set_source_rgb(cr, 1, 1, 1);
 847         pango_cairo_show_layout (cr, layout);
 848         cairo_destroy (cr);
 849
 850         buffer = gdk_pixbuf_new_from_data (cairo_image_surface_get_data (source),
 851                                            GDK_COLORSPACE_RGB,
 852                                            cairo_image_surface_get_format (source) == CAIRO_FORMAT_ARGB32,
 853                                            8,
 854                                            cairo_image_surface_get_width (source),
 855                                            cairo_image_surface_get_height (source),
 856                                            cairo_image_surface_get_stride (source),
 857                                            NULL,
 858                                            NULL);
 859
 860         sx = 0;
 861         sy = 0;
 862         dw = gdk_pixbuf_get_width(pixbuf);
 863         dh = gdk_pixbuf_get_height(pixbuf);
 864
 865         if (x < 0)
 866                 {
 867                 w += x;
 868                 sx = -x;
 869                 x = 0;
 870                 }
 871
 872         if (y < 0)
 873                 {
 874                 h += y;
 875                 sy = -y;
 876                 y = 0;
 877                 }
 878
 879         if (x + w > dw) w = dw - x;
 880         if (y + h > dh) h = dh - y;
 881
 882         pixbuf_copy_font(buffer, sx, sy,
 883                          pixbuf, x, y, w, h,
 884                          r, g, b, a);
 885
 886         g_object_unref(buffer);
 887         cairo_surface_destroy(source);
 888 }
 889
 890 /*
 891  *-----------------------------------------------------------------------------
 892  * pixbuf drawing (triangle)
 893  *-----------------------------------------------------------------------------
 894  */
 895
 896 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 897                         gint *rx, gint *ry, gint *rw, gint *rh)
 898 {
 899         gint tx, ty, tw, th;
 900
 901         tx = MIN(x1, x2);
 902         tx = MIN(tx, x3);
 903         ty = MIN(y1, y2);
 904         ty = MIN(ty, y3);
 905         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 906         tw = MAX(tw, abs(x3 - x1));
 907         th = MAX(abs(y1 - y2), abs(y2 - y3));
 908         th = MAX(th, abs(y3 - y1));
 909
 910         *rx = tx;
 911         *ry = ty;
 912         *rw = tw;
 913         *rh = th;
 914 }
 915
 916 void pixbuf_draw_triangle(GdkPixbuf *pb,
 917                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 918                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 919                           guint8 r, guint8 g, guint8 b, guint8 a)
 920 {
 921         gboolean has_alpha;
 922         gint pw, ph, prs;
 923         gint rx, ry, rw, rh;
 924         gint tx, ty, tw, th;
 925         gint fx1, fy1;
 926         gint fx2, fy2;
 927         gint fw, fh;
 928         guchar *p_pix;
 929         guchar *pp;
 930         gint p_step;
 931         gdouble slope1, slope2;
 932         gint slope1_x, slope1_y;
 933         gint y;
 934         gint t;
 935         gboolean middle = FALSE;
 936
 937         if (!pb) return;
 938
 939         pw = gdk_pixbuf_get_width(pb);
 940         ph = gdk_pixbuf_get_height(pb);
 941
 942         if (!util_clip_region(0, 0, pw, ph,
 943                               clip_x, clip_y, clip_w, clip_h,
 944                               &rx, &ry, &rw, &rh)) return;
 945
 946         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 947                            &tx, &ty, &tw, &th);
 948
 949         if (!util_clip_region(rx, ry, rw, rh,
 950                               tx, ty, tw, th,
 951                               &fx1, &fy1, &fw, &fh)) return;
 952         fx2 = fx1 + fw;
 953         fy2 = fy1 + fh;
 954
 955         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 956         prs = gdk_pixbuf_get_rowstride(pb);
 957         p_pix = gdk_pixbuf_get_pixels(pb);
 958
 959         p_step = (has_alpha) ? 4 : 3;
 960
 961         if (y1 > y2)
 962                 {
 963                 t = x1; x1 = x2; x2 = t;
 964                 t = y1; y1 = y2; y2 = t;
 965                 }
 966         if (y2 > y3)
 967                 {
 968                 t = x2; x2 = x3; x3 = t;
 969                 t = y2; y2 = y3; y3 = t;
 970                 }
 971         if (y1 > y2)
 972                 {
 973                 t = x1; x1 = x2; x2 = t;
 974                 t = y1; y1 = y2; y2 = t;
 975                 }
 976
 977         slope1 = (gdouble)(y2 - y1);
 978         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
 979         slope1_x = x1;
 980         slope1_y = y1;
 981         slope2 = (gdouble)(y3 - y1);
 982         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
 983
 984         for (y = fy1; y < fy2; y++)
 985                 {
 986                 gint xa, xb;
 987
 988                 if (!middle && y > y2)
 989                         {
 990                         slope1 = (gdouble)(y3 - y2);
 991                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
 992                         slope1_x = x2;
 993                         slope1_y = y2;
 994
 995                         middle = TRUE;
 996                         }
 997
 998                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
 999                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
1000
1001                 if (xa > xb)
1002                         {
1003                         t = xa; xa = xb; xb = t;
1004                         }
1005
1006                 xa = CLAMP(xa, fx1, fx2);
1007                 xb = CLAMP(xb, fx1, fx2);
1008
1009                 pp = p_pix + y * prs + xa * p_step;
1010
1011                 while (xa < xb)
1012                         {
1013                         *pp = (r * a + *pp * (256-a)) >> 8;
1014                         pp++;
1015                         *pp = (g * a + *pp * (256-a)) >> 8;
1016                         pp++;
1017                         *pp = (b * a + *pp * (256-a)) >> 8;
1018                         pp++;
1019                         if (has_alpha) pp++;
1020
1021                         xa++;
1022                         }
1023                 }
1024 }
1025
1026 /*
1027  *-----------------------------------------------------------------------------
1028  * pixbuf drawing (line)
1029  *-----------------------------------------------------------------------------
1030  */
1031
1032 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
1033                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
1034                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
1035 {
1036         gboolean flip = FALSE;
1037         gdouble d;
1038
1039         if (x1 > x2)
1040                 {
1041                 gdouble t;
1042
1043                 t = x1; x1 = x2; x2 = t;
1044                 t = y1; y1 = y2; y2 = t;
1045                 flip = TRUE;
1046                 }
1047
1048         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
1049
1050         if (y1 < y2)
1051                 {
1052                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1053                 }
1054         else
1055                 {
1056                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1057                 }
1058
1059         d = x2 - x1;
1060         if (d > 0.0)
1061                 {
1062                 gdouble slope;
1063
1064                 slope = (y2 - y1) / d;
1065                 if (x1 < clip_x)
1066                         {
1067                         y1 = y1 + slope * (clip_x - x1);
1068                         x1 = clip_x;
1069                         }
1070                 if (x2 > clip_x + clip_w)
1071                         {
1072                         y2 = y2 + slope * (clip_x + clip_w - x2);
1073                         x2 = clip_x + clip_w;
1074                         }
1075                 }
1076
1077         if (y1 < y2)
1078                 {
1079                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1080                 }
1081         else
1082                 {
1083                 gdouble t;
1084
1085                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1086
1087                 t = x1; x1 = x2; x2 = t;
1088                 t = y1; y1 = y2; y2 = t;
1089                 flip = !flip;
1090                 }
1091
1092         d = y2 - y1;
1093         if (d > 0.0)
1094                 {
1095                 gdouble slope;
1096
1097                 slope = (x2 - x1) / d;
1098                 if (y1 < clip_y)
1099                         {
1100                         x1 = x1 + slope * (clip_y - y1);
1101                         y1 = clip_y;
1102                         }
1103                 if (y2 > clip_y + clip_h)
1104                         {
1105                         x2 = x2 + slope * (clip_y + clip_h - y2);
1106                         y2 = clip_y + clip_h;
1107                         }
1108                 }
1109
1110         if (flip)
1111                 {
1112                 *rx1 = x2;
1113                 *ry1 = y2;
1114                 *rx2 = x1;
1115                 *ry2 = y1;
1116                 }
1117         else
1118                 {
1119                 *rx1 = x1;
1120                 *ry1 = y1;
1121                 *rx2 = x2;
1122                 *ry2 = y2;
1123                 }
1124
1125         return TRUE;
1126 }
1127
1128 void pixbuf_draw_line(GdkPixbuf *pb,
1129                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1130                       gint x1, gint y1, gint x2, gint y2,
1131                       guint8 r, guint8 g, guint8 b, guint8 a)
1132 {
1133         gboolean has_alpha;
1134         gint pw, ph, prs;
1135         gint rx, ry, rw, rh;
1136         gdouble rx1, ry1, rx2, ry2;
1137         guchar *p_pix;
1138         guchar *pp;
1139         gint p_step;
1140         gdouble slope;
1141         gdouble x, y;
1142         gint px, py;
1143         gint cx1, cy1, cx2, cy2;
1144
1145         if (!pb) return;
1146
1147         pw = gdk_pixbuf_get_width(pb);
1148         ph = gdk_pixbuf_get_height(pb);
1149
1150         if (!util_clip_region(0, 0, pw, ph,
1151                               clip_x, clip_y, clip_w, clip_h,
1152                               &rx, &ry, &rw, &rh)) return;
1153         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
1154                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
1155                             &rx1, &ry1, &rx2, &ry2)) return;
1156
1157         cx1 = rx;
1158         cy1 = ry;
1159         cx2 = rx + rw;
1160         cy2 = ry + rh;
1161
1162         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1163         prs = gdk_pixbuf_get_rowstride(pb);
1164         p_pix = gdk_pixbuf_get_pixels(pb);
1165
1166         p_step = (has_alpha) ? 4 : 3;
1167
1168         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1169                 {
1170                 if (rx1 > rx2)
1171                         {
1172                         gdouble t;
1173                         t = rx1; rx1 = rx2; rx2 = t;
1174                         t = ry1; ry1 = ry2; ry2 = t;
1175                         }
1176
1177                 slope = rx2 - rx1;
1178                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1179                 for (x = rx1; x < rx2; x += 1.0)
1180                         {
1181                         px = (gint)(x + 0.5);
1182                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1183
1184                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1185                                 {
1186                                 pp = p_pix + py * prs + px * p_step;
1187                                 *pp = (r * a + *pp * (256-a)) >> 8;
1188                                 pp++;
1189                                 *pp = (g * a + *pp * (256-a)) >> 8;
1190                                 pp++;
1191                                 *pp = (b * a + *pp * (256-a)) >> 8;
1192                                 }
1193                         }
1194                 }
1195         else
1196                 {
1197                 if (ry1 > ry2)
1198                         {
1199                         gdouble t;
1200                         t = rx1; rx1 = rx2; rx2 = t;
1201                         t = ry1; ry1 = ry2; ry2 = t;
1202                         }
1203
1204                 slope = ry2 - ry1;
1205                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1206                 for (y = ry1; y < ry2; y += 1.0)
1207                         {
1208                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1209                         py = (gint)(y + 0.5);
1210
1211                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1212                                 {
1213                                 pp = p_pix + py * prs + px * p_step;
1214                                 *pp = (r * a + *pp * (256-a)) >> 8;
1215                                 pp++;
1216                                 *pp = (g * a + *pp * (256-a)) >> 8;
1217                                 pp++;
1218                                 *pp = (b * a + *pp * (256-a)) >> 8;
1219                                 }
1220                         }
1221                 }
1222 }
1223
1224 /*
1225  *-----------------------------------------------------------------------------
1226  * pixbuf drawing (fades and shadows)
1227  *-----------------------------------------------------------------------------
1228  */
1229
1230 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1231                                     gint s, gboolean vertical, gint border,
1232                                     gint x1, gint y1, gint x2, gint y2,
1233                                     guint8 r, guint8 g, guint8 b, guint8 a)
1234 {
1235         guchar *pp;
1236         gint p_step;
1237         guint8 n = a;
1238         gint i, j;
1239
1240         p_step = (has_alpha) ? 4 : 3;
1241         for (j = y1; j < y2; j++)
1242                 {
1243                 pp = p_pix + j * prs + x1 * p_step;
1244                 if (!vertical) n = a - a * abs(j - s) / border;
1245                 for (i = x1; i < x2; i++)
1246                         {
1247                         if (vertical) n = a - a * abs(i - s) / border;
1248                         *pp = (r * n + *pp * (256-n)) >> 8;
1249                         pp++;
1250                         *pp = (g * n + *pp * (256-n)) >> 8;
1251                         pp++;
1252                         *pp = (b * n + *pp * (256-n)) >> 8;
1253                         pp++;
1254                         if (has_alpha) pp++;
1255                         }
1256                 }
1257 }
1258
1259 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1260                                     gint sx, gint sy, gint border,
1261                                     gint x1, gint y1, gint x2, gint y2,
1262                                     guint8 r, guint8 g, guint8 b, guint8 a)
1263 {
1264         guchar *pp;
1265         gint p_step;
1266         gint i, j;
1267
1268         p_step = (has_alpha) ? 4 : 3;
1269         for (j = y1; j < y2; j++)
1270                 {
1271                 pp = p_pix + j * prs + x1 * p_step;
1272                 for (i = x1; i < x2; i++)
1273                         {
1274                         guint8 n;
1275                         gint r;
1276
1277                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1278                         n = a - a * r / border;
1279                         *pp = (r * n + *pp * (256-n)) >> 8;
1280                         pp++;
1281                         *pp = (g * n + *pp * (256-n)) >> 8;
1282                         pp++;
1283                         *pp = (b * n + *pp * (256-n)) >> 8;
1284                         pp++;
1285                         if (has_alpha) pp++;
1286                         }
1287                 }
1288 }
1289
1290 void pixbuf_draw_shadow(GdkPixbuf *pb,
1291                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1292                         gint x, gint y, gint w, gint h, gint border,
1293                         guint8 r, guint8 g, guint8 b, guint8 a)
1294 {
1295         gint has_alpha;
1296         gint pw, ph, prs;
1297         gint rx, ry, rw, rh;
1298         gint fx, fy, fw, fh;
1299         guchar *p_pix;
1300
1301         if (!pb) return;
1302
1303         pw = gdk_pixbuf_get_width(pb);
1304         ph = gdk_pixbuf_get_height(pb);
1305
1306         if (!util_clip_region(0, 0, pw, ph,
1307                               clip_x, clip_y, clip_w, clip_h,
1308                               &rx, &ry, &rw, &rh)) return;
1309
1310         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1311         prs = gdk_pixbuf_get_rowstride(pb);
1312         p_pix = gdk_pixbuf_get_pixels(pb);
1313
1314         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1315                              rx, ry, rw, rh,
1316                              &fx, &fy, &fw, &fh))
1317                 {
1318                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1319                 }
1320
1321         if (border < 1) return;
1322
1323         if (util_clip_region(x, y + border, border, h - border * 2,
1324                              rx, ry, rw, rh,
1325                              &fx, &fy, &fw, &fh))
1326                 {
1327                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1328                                         x + border, TRUE, border,
1329                                         fx, fy, fx + fw, fy + fh,
1330                                         r, g, b, a);
1331                 }
1332         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1333                              rx, ry, rw, rh,
1334                              &fx, &fy, &fw, &fh))
1335                 {
1336                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1337                                         x + w - border, TRUE, border,
1338                                         fx, fy, fx + fw, fy + fh,
1339                                         r, g, b, a);
1340                 }
1341         if (util_clip_region(x + border, y, w - border * 2, border,
1342                              rx, ry, rw, rh,
1343                              &fx, &fy, &fw, &fh))
1344                 {
1345                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1346                                         y + border, FALSE, border,
1347                                         fx, fy, fx + fw, fy + fh,
1348                                         r, g, b, a);
1349                 }
1350         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1351                              rx, ry, rw, rh,
1352                              &fx, &fy, &fw, &fh))
1353                 {
1354                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1355                                         y + h - border, FALSE, border,
1356                                         fx, fy, fx + fw, fy + fh,
1357                                         r, g, b, a);
1358                 }
1359         if (util_clip_region(x, y, border, border,
1360                              rx, ry, rw, rh,
1361                              &fx, &fy, &fw, &fh))
1362                 {
1363                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1364                                         x + border, y + border, border,
1365                                         fx, fy, fx + fw, fy + fh,
1366                                         r, g, b, a);
1367                 }
1368         if (util_clip_region(x + w - border, y, border, border,
1369                              rx, ry, rw, rh,
1370                              &fx, &fy, &fw, &fh))
1371                 {
1372                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1373                                         x + w - border, y + border, border,
1374                                         fx, fy, fx + fw, fy + fh,
1375                                         r, g, b, a);
1376                 }
1377         if (util_clip_region(x, y + h - border, border, border,
1378                              rx, ry, rw, rh,
1379                              &fx, &fy, &fw, &fh))
1380                 {
1381                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1382                                         x + border, y + h - border, border,
1383                                         fx, fy, fx + fw, fy + fh,
1384                                         r, g, b, a);
1385                 }
1386         if (util_clip_region(x + w - border, y + h - border, border, border,
1387                              rx, ry, rw, rh,
1388                              &fx, &fy, &fw, &fh))
1389                 {
1390                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1391                                         x + w - border, y + h - border, border,
1392                                         fx, fy, fx + fw, fy + fh,
1393                                         r, g, b, a);
1394                 }
1395 }
1396
1397
1398 /*
1399  *-----------------------------------------------------------------------------
1400  * pixbuf color alterations
1401  *-----------------------------------------------------------------------------
1402  */
1403
1404 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1405                             gint x, gint y, gint w, gint h)
1406 {
1407         gboolean has_alpha;
1408         gint pw, ph, prs;
1409         guchar *p_pix;
1410         guchar *pp;
1411         gint i, j;
1412
1413         if (!pb) return;
1414
1415         pw = gdk_pixbuf_get_width(pb);
1416         ph = gdk_pixbuf_get_height(pb);
1417
1418         if (x < 0 || x + w > pw) return;
1419         if (y < 0 || y + h > ph) return;
1420
1421         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1422         prs = gdk_pixbuf_get_rowstride(pb);
1423         p_pix = gdk_pixbuf_get_pixels(pb);
1424
1425         for (i = 0; i < h; i++)
1426                 {
1427                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1428                 for (j = 0; j < w; j++)
1429                         {
1430                         guint8 grey;
1431
1432                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1433                         *pp = grey;
1434                         pp++;
1435                         *pp = grey;
1436                         pp++;
1437                         *pp = grey;
1438                         pp++;
1439                         if (has_alpha) pp++;
1440                         }
1441                 }
1442 }
1443 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */