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         { PIXBUF_INLINE_ICON_FILE_FILTER,       icon_file_filter },
 142         { PIXBUF_INLINE_ICON_CW,        icon_rotate_clockwise },
 143         { PIXBUF_INLINE_ICON_CCW,       icon_rotate_counter_clockwise },
 144         { PIXBUF_INLINE_ICON_180,       icon_rotate_180 },
 145         { PIXBUF_INLINE_ICON_MIRROR,    icon_mirror },
 146         { PIXBUF_INLINE_ICON_FLIP,      icon_flip },
 147         { PIXBUF_INLINE_ICON_ORIGINAL,  icon_original },
 148         { PIXBUF_INLINE_ICON_TRASH,     icon_trash },
 149         { NULL, NULL }
 150 };
 151
 152 GdkPixbuf *pixbuf_inline(const gchar *key)
 153 {
 154         gint i;
 155
 156         if (!key) return NULL;
 157
 158         i = 0;
 159         while (inline_pixbuf_data[i].key)
 160                 {
 161                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 162                         {
 163                         return gdk_pixbuf_new_from_inline(-1, inline_pixbuf_data[i].data, FALSE, NULL);
 164                         }
 165                 i++;
 166                 }
 167
 168         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 169
 170         return NULL;
 171 }
 172
 173 static void register_stock_icon(const gchar *key, GdkPixbuf *pixbuf)
 174 {
 175         static GtkIconFactory *icon_factory = NULL;
 176         GtkIconSet *icon_set;
 177
 178         if (!icon_factory)
 179                 {
 180                 icon_factory = gtk_icon_factory_new();
 181                 gtk_icon_factory_add_default(icon_factory);
 182                 }
 183
 184         icon_set = gtk_icon_set_new_from_pixbuf(pixbuf);
 185         gtk_icon_factory_add(icon_factory, key, icon_set);
 186 }
 187
 188
 189 void pixbuf_inline_register_stock_icons(void)
 190 {
 191         gint i;
 192
 193         i = 0;
 194         while (inline_pixbuf_data[i].key)
 195                 {
 196                 register_stock_icon(inline_pixbuf_data[i].key, pixbuf_inline(inline_pixbuf_data[i].key));
 197                 i++;
 198                 }
 199 }
 200
 201 gboolean register_theme_icon_as_stock(const gchar *key, const gchar *icon)
 202 {
 203         GtkIconTheme *icon_theme;
 204         GdkPixbuf *pixbuf;
 205         GError *error = NULL;
 206
 207         icon_theme = gtk_icon_theme_get_default();
 208
 209         if (gtk_icon_theme_has_icon(icon_theme, key)) return FALSE;
 210
 211         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 212                            icon, /* icon name */
 213                            64, /* size */
 214                            0,  /* flags */
 215                            &error);
 216         if (!pixbuf)
 217                 {
 218                 if (error)
 219                         {
 220                         DEBUG_1("Couldn't load icon %s: %s", icon, error->message);
 221                         g_error_free(error);
 222                         error = NULL;
 223                         }
 224
 225                 if (strchr(icon, '.'))
 226                         {
 227                         /* try again without extension */
 228                         gchar *icon2 = remove_extension_from_path(icon);
 229                         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 230                                            icon2, /* icon name */
 231                                            64, /* size */
 232                                            0,  /* flags */
 233                                            &error);
 234                         if (error)
 235                                 {
 236                                 DEBUG_1("Couldn't load icon %s: %s", icon2, error->message);
 237                                 g_error_free(error);
 238                                 error = NULL;
 239
 240                                 /* try as an absolute path */
 241                                 pixbuf = gdk_pixbuf_new_from_file(icon, &error);
 242                                 if (error)
 243                                         {
 244                                         DEBUG_1("Couldn't load icon as absolute path %s: %s", icon, error->message);
 245                                         g_error_free(error);
 246                                         }
 247                                 }
 248                         g_free(icon2);
 249                         }
 250                 }
 251
 252         if (!pixbuf) return FALSE;
 253
 254         register_stock_icon(key, pixbuf);
 255         return TRUE;
 256 }
 257
 258 gboolean pixbuf_scale_aspect(gint req_w, gint req_h,
 259                              gint old_w, gint old_h,
 260                              gint *new_w, gint *new_h)
 261 {
 262         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 263                 {
 264                 *new_w = req_w;
 265                 *new_h = (gdouble)*new_w / old_w * old_h;
 266                 if (*new_h < 1) *new_h = 1;
 267                 }
 268         else
 269                 {
 270                 *new_h = req_h;
 271                 *new_w = (gdouble)*new_h / old_h * old_w;
 272                 if (*new_w < 1) *new_w = 1;
 273                 }
 274
 275         return (*new_w != old_w || *new_h != old_h);
 276 }
 277
 278 GdkPixbuf *pixbuf_fallback(FileData *fd, gint requested_width, gint requested_height)
 279 {
 280         GdkPixbuf *pixbuf;
 281
 282         switch (fd->format_class)
 283                 {
 284                 case FORMAT_CLASS_UNKNOWN:
 285                         pixbuf = pixbuf_inline(PIXBUF_INLINE_UNKNOWN);
 286                         break;
 287                 case FORMAT_CLASS_META:
 288                         pixbuf = pixbuf_inline(PIXBUF_INLINE_METADATA);
 289                         break;
 290                 case FORMAT_CLASS_VIDEO:
 291                         pixbuf = pixbuf_inline(PIXBUF_INLINE_VIDEO);
 292                         break;
 293                 case FORMAT_CLASS_COLLECTION:
 294                         pixbuf = pixbuf_inline(PIXBUF_INLINE_COLLECTION);
 295                         break;
 296                 case FORMAT_CLASS_PDF:
 297                         pixbuf = pixbuf_inline(PIXBUF_INLINE_ICON_PDF);
 298                         break;
 299                 default:
 300                         pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 301                 }
 302
 303         if (requested_width && requested_height)
 304                 {
 305                 gint w = gdk_pixbuf_get_width(pixbuf);
 306                 gint h = gdk_pixbuf_get_height(pixbuf);
 307
 308                 if (w > requested_width || h > requested_height)
 309                         {
 310                         gint nw, nh;
 311
 312                         if (pixbuf_scale_aspect(requested_width, requested_height,
 313                                                           w, h, &nw, &nh))
 314                                 {
 315                                 GdkPixbuf *tmp;
 316
 317                                 tmp = pixbuf;
 318                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 319                                 g_object_unref(G_OBJECT(tmp));
 320                                 }
 321                         }
 322                 }
 323         return pixbuf;
 324 }
 325
 326
 327 /*
 328  *-----------------------------------------------------------------------------
 329  * misc utils
 330  *-----------------------------------------------------------------------------
 331  */
 332
 333 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 334                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 335                           gint *rx, gint *ry, gint *rw, gint *rh)
 336 {
 337         if (clip_x + clip_w <= x ||
 338             clip_x >= x + w ||
 339             clip_y + clip_h <= y ||
 340             clip_y >= y + h)
 341                 {
 342                 return FALSE;
 343                 }
 344
 345         *rx = MAX(x, clip_x);
 346         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 347
 348         *ry = MAX(y, clip_y);
 349         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 350
 351         return TRUE;
 352 }
 353
 354 /*
 355  *-----------------------------------------------------------------------------
 356  * pixbuf rotation
 357  *-----------------------------------------------------------------------------
 358  */
 359
 360 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 361                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 362                                      gint bytes_per_pixel, gboolean counter_clockwise)
 363 {
 364         gint i, j;
 365         guchar *sp;
 366         guchar *dp;
 367
 368         for (i = 0; i < h; i++)
 369                 {
 370                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 371                 for (j = 0; j < w; j++)
 372                         {
 373                         if (counter_clockwise)
 374                                 {
 375                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 376                                 }
 377                         else
 378                                 {
 379                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 380                                 }
 381                         *(dp++) = *(sp++);      /* r */
 382                         *(dp++) = *(sp++);      /* g */
 383                         *(dp++) = *(sp++);      /* b */
 384                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 385                         }
 386                 }
 387
 388 }
 389
 390 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 391                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 392 {
 393         gint i;
 394         guchar *sp;
 395         guchar *dp;
 396
 397         for (i = 0; i < h; i++)
 398                 {
 399                 sp = src + (i * src_row_stride);
 400                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 401                 memcpy(dp, sp, w * bytes_per_pixel);
 402                 }
 403 }
 404
 405 #define ROTATE_BUFFER_WIDTH 48
 406 #define ROTATE_BUFFER_HEIGHT 48
 407
 408 /*
 409  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 410  *
 411  */
 412 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 413 {
 414         GdkPixbuf *dest;
 415         gboolean has_alpha;
 416         gint sw, sh, srs;
 417         gint dw, dh, drs;
 418         guchar *s_pix;
 419         guchar *d_pix;
 420         gint i, j;
 421         gint a;
 422         GdkPixbuf *buffer;
 423         guchar *b_pix;
 424         gint brs;
 425         gint w, h;
 426
 427         if (!src) return NULL;
 428
 429         sw = gdk_pixbuf_get_width(src);
 430         sh = gdk_pixbuf_get_height(src);
 431         has_alpha = gdk_pixbuf_get_has_alpha(src);
 432         srs = gdk_pixbuf_get_rowstride(src);
 433         s_pix = gdk_pixbuf_get_pixels(src);
 434
 435         dw = sh;
 436         dh = sw;
 437         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 438         drs = gdk_pixbuf_get_rowstride(dest);
 439         d_pix = gdk_pixbuf_get_pixels(dest);
 440
 441         a = (has_alpha ? 4 : 3);
 442
 443         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 444                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 445         b_pix = gdk_pixbuf_get_pixels(buffer);
 446         brs = gdk_pixbuf_get_rowstride(buffer);
 447
 448         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 449                 {
 450                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 451                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 452                         {
 453                         gint x, y;
 454
 455                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 456                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 457                                                  b_pix, brs, h, w,
 458                                                  a, counter_clockwise);
 459
 460                         if (counter_clockwise)
 461                                 {
 462                                 x = i;
 463                                 y = sw - h - j;
 464                                 }
 465                         else
 466                                 {
 467                                 x = sh - w - i;
 468                                 y = j;
 469                                 }
 470                         pixbuf_copy_block(b_pix, brs, w, h,
 471                                           d_pix, drs, x, y, a);
 472                         }
 473                 }
 474
 475         g_object_unref(buffer);
 476
 477 #if 0
 478         /* this is the simple version of rotation (roughly 2-4x slower) */
 479
 480         for (i = 0; i < sh; i++)
 481                 {
 482                 sp = s_pix + (i * srs);
 483                 for (j = 0; j < sw; j++)
 484                         {
 485                         if (counter_clockwise)
 486                                 {
 487                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 488                                 }
 489                         else
 490                                 {
 491                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 492                                 }
 493
 494                         *(dp++) = *(sp++);      /* r */
 495                         *(dp++) = *(sp++);      /* g */
 496                         *(dp++) = *(sp++);      /* b */
 497                         if (has_alpha) *(dp) = *(sp++); /* a */
 498                         }
 499                 }
 500 #endif
 501
 502         return dest;
 503 }
 504
 505 /*
 506  * Returns a copy of pixbuf mirrored and or flipped.
 507  * TO do a 180 degree rotations set both mirror and flipped TRUE
 508  * if mirror and flip are FALSE, result is a simple copy.
 509  */
 510 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 511 {
 512         GdkPixbuf *dest;
 513         gboolean has_alpha;
 514         gint w, h, srs;
 515         gint drs;
 516         guchar *s_pix;
 517         guchar *d_pix;
 518         guchar *sp;
 519         guchar *dp;
 520         gint i, j;
 521         gint a;
 522
 523         if (!src) return NULL;
 524
 525         w = gdk_pixbuf_get_width(src);
 526         h = gdk_pixbuf_get_height(src);
 527         has_alpha = gdk_pixbuf_get_has_alpha(src);
 528         srs = gdk_pixbuf_get_rowstride(src);
 529         s_pix = gdk_pixbuf_get_pixels(src);
 530
 531         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 532         drs = gdk_pixbuf_get_rowstride(dest);
 533         d_pix = gdk_pixbuf_get_pixels(dest);
 534
 535         a = has_alpha ? 4 : 3;
 536
 537         for (i = 0; i < h; i++)
 538                 {
 539                 sp = s_pix + (i * srs);
 540                 if (flip)
 541                         {
 542                         dp = d_pix + ((h - i - 1) * drs);
 543                         }
 544                 else
 545                         {
 546                         dp = d_pix + (i * drs);
 547                         }
 548                 if (mirror)
 549                         {
 550                         dp += (w - 1) * a;
 551                         for (j = 0; j < w; j++)
 552                                 {
 553                                 *(dp++) = *(sp++);      /* r */
 554                                 *(dp++) = *(sp++);      /* g */
 555                                 *(dp++) = *(sp++);      /* b */
 556                                 if (has_alpha) *(dp) = *(sp++); /* a */
 557                                 dp -= (a + 3);
 558                                 }
 559                         }
 560                 else
 561                         {
 562                         for (j = 0; j < w; j++)
 563                                 {
 564                                 *(dp++) = *(sp++);      /* r */
 565                                 *(dp++) = *(sp++);      /* g */
 566                                 *(dp++) = *(sp++);      /* b */
 567                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 568                                 }
 569                         }
 570                 }
 571
 572         return dest;
 573 }
 574
 575 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 576 {
 577         GdkPixbuf *dest;
 578         GdkPixbuf *tmp = NULL;
 579
 580         switch (orientation)
 581                 {
 582                 case EXIF_ORIENTATION_TOP_LEFT:
 583                         dest = gdk_pixbuf_copy(pixbuf);
 584                         break;
 585                 case EXIF_ORIENTATION_TOP_RIGHT:
 586                         /* mirrored */
 587                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 588                         break;
 589                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 590                         /* upside down */
 591                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 592                         break;
 593                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 594                         /* flipped */
 595                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 596                         break;
 597                 case EXIF_ORIENTATION_LEFT_TOP:
 598                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 599                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 600                         break;
 601                 case EXIF_ORIENTATION_RIGHT_TOP:
 602                         /* rotated -90 (270) */
 603                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 604                         break;
 605                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 606                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 607                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 608                         break;
 609                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 610                         /* rotated 90 */
 611                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 612                         break;
 613                 default:
 614                         dest = gdk_pixbuf_copy(pixbuf);
 615                         break;
 616                 }
 617         if (tmp) g_object_unref(tmp);
 618         return dest;
 619
 620 }
 621
 622
 623 /*
 624  *-----------------------------------------------------------------------------
 625  * pixbuf drawing (rectangles)
 626  *-----------------------------------------------------------------------------
 627  */
 628
 629 /*
 630  * Fills region of pixbuf at x,y over w,h
 631  * with colors red (r), green (g), blue (b)
 632  * applying alpha (a), use a=255 for solid.
 633  */
 634 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 635                            gint x, gint y, gint w, gint h,
 636                            gint r, gint g, gint b, gint a)
 637 {
 638         gboolean has_alpha;
 639         gint pw, ph, prs;
 640         guchar *p_pix;
 641         guchar *pp;
 642         gint i, j;
 643
 644         if (!pb) return;
 645
 646         pw = gdk_pixbuf_get_width(pb);
 647         ph = gdk_pixbuf_get_height(pb);
 648
 649         if (x < 0 || x + w > pw) return;
 650         if (y < 0 || y + h > ph) return;
 651
 652         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 653         prs = gdk_pixbuf_get_rowstride(pb);
 654         p_pix = gdk_pixbuf_get_pixels(pb);
 655
 656         for (i = 0; i < h; i++)
 657                 {
 658                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 659                 for (j = 0; j < w; j++)
 660                         {
 661                         *pp = (r * a + *pp * (256-a)) >> 8;
 662                         pp++;
 663                         *pp = (g * a + *pp * (256-a)) >> 8;
 664                         pp++;
 665                         *pp = (b * a + *pp * (256-a)) >> 8;
 666                         pp++;
 667                         if (has_alpha) pp++;
 668                         }
 669                 }
 670 }
 671
 672 void pixbuf_draw_rect(GdkPixbuf *pb,
 673                       gint x, gint y, gint w, gint h,
 674                       gint r, gint g, gint b, gint a,
 675                       gint left, gint right, gint top, gint bottom)
 676 {
 677         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 678                               r, g, b ,a);
 679         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 680                               r, g, b ,a);
 681         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 682                               r, g, b ,a);
 683         pixbuf_draw_rect_fill(pb, x, y, left, h,
 684                               r, g, b ,a);
 685 }
 686
 687 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 688                           gint x, gint y, gint w, gint h,
 689                           gint r, gint g, gint b, gint a)
 690 {
 691         gboolean has_alpha;
 692         gint pw, ph, prs;
 693         guchar *p_pix;
 694         guchar *pp;
 695         gint i, j;
 696
 697         if (!pb) return;
 698
 699         pw = gdk_pixbuf_get_width(pb);
 700         ph = gdk_pixbuf_get_height(pb);
 701
 702         if (x < 0 || x + w > pw) return;
 703         if (y < 0 || y + h > ph) return;
 704
 705         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 706         prs = gdk_pixbuf_get_rowstride(pb);
 707         p_pix = gdk_pixbuf_get_pixels(pb);
 708
 709         for (i = 0; i < h; i++)
 710                 {
 711                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 712                 for (j = 0; j < w; j++)
 713                         {
 714                         *pp = r; pp++;
 715                         *pp = g; pp++;
 716                         *pp = b; pp++;
 717                         if (has_alpha) { *pp = a; pp++; }
 718                         }
 719                 }
 720 }
 721
 722 void pixbuf_set_rect(GdkPixbuf *pb,
 723                      gint x, gint y, gint w, gint h,
 724                      gint r, gint g, gint b, gint a,
 725                      gint left, gint right, gint top, gint bottom)
 726 {
 727         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 728                              r, g, b ,a);
 729         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 730                              r, g, b ,a);
 731         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 732                              r, g, b ,a);
 733         pixbuf_set_rect_fill(pb, x, y, left, h,
 734                              r, g, b ,a);
 735 }
 736
 737 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 738 {
 739         guchar *buf;
 740         gboolean has_alpha;
 741         gint rowstride;
 742         guchar *p;
 743
 744         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 745             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 746
 747         buf = gdk_pixbuf_get_pixels(pb);
 748         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 749         rowstride = gdk_pixbuf_get_rowstride(pb);
 750
 751         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 752         *p = r; p++;
 753         *p = g; p++;
 754         *p = b; p++;
 755         if (has_alpha) *p = a;
 756 }
 757
 758
 759 /*
 760  *-----------------------------------------------------------------------------
 761  * pixbuf text rendering
 762  *-----------------------------------------------------------------------------
 763  */
 764
 765 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 766                              GdkPixbuf *dest, gint dx, gint dy,
 767                              gint w, gint h,
 768                              guint8 r, guint8 g, guint8 b, guint8 a)
 769 {
 770         gint sw, sh, srs;
 771         gboolean s_alpha;
 772         gint s_step;
 773         guchar *s_pix;
 774         gint dw, dh, drs;
 775         gboolean d_alpha;
 776         gint d_step;
 777         guchar *d_pix;
 778
 779         guchar *sp;
 780         guchar *dp;
 781         gint i, j;
 782
 783         if (!src || !dest) return;
 784
 785         sw = gdk_pixbuf_get_width(src);
 786         sh = gdk_pixbuf_get_height(src);
 787
 788         if (sx < 0 || sx + w > sw) return;
 789         if (sy < 0 || sy + h > sh) return;
 790
 791         dw = gdk_pixbuf_get_width(dest);
 792         dh = gdk_pixbuf_get_height(dest);
 793
 794         if (dx < 0 || dx + w > dw) return;
 795         if (dy < 0 || dy + h > dh) return;
 796
 797         s_alpha = gdk_pixbuf_get_has_alpha(src);
 798         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 799         srs = gdk_pixbuf_get_rowstride(src);
 800         drs = gdk_pixbuf_get_rowstride(dest);
 801         s_pix = gdk_pixbuf_get_pixels(src);
 802         d_pix = gdk_pixbuf_get_pixels(dest);
 803
 804         s_step = (s_alpha) ? 4 : 3;
 805         d_step = (d_alpha) ? 4 : 3;
 806
 807         for (i = 0; i < h; i++)
 808                 {
 809                 sp = s_pix + (sy + i) * srs + sx * s_step;
 810                 dp = d_pix + (dy + i) * drs + dx * d_step;
 811                 for (j = 0; j < w; j++)
 812                         {
 813                         if (*sp)
 814                                 {
 815                                 guint8 asub;
 816
 817                                 asub = a * sp[0] / 255;
 818                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 819                                 dp++;
 820                                 asub = a * sp[1] / 255;
 821                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 822                                 dp++;
 823                                 asub = a * sp[2] / 255;
 824                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 825                                 dp++;
 826
 827                                 if (d_alpha)
 828                                         {
 829                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 830                                         dp++;
 831                                         }
 832                                 }
 833                         else
 834                                 {
 835                                 dp += d_step;
 836                                 }
 837
 838                         sp += s_step;
 839                         }
 840                 }
 841 }
 842
 843 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 844                         gint x, gint y,
 845                         guint8 r, guint8 g, guint8 b, guint8 a)
 846 {
 847         GdkPixbuf *buffer;
 848         gint w, h;
 849         gint sx, sy;
 850         gint dw, dh;
 851         cairo_surface_t *source;
 852         cairo_t *cr;
 853
 854         pango_layout_get_pixel_size(layout, &w, &h);
 855         if (w < 1 || h < 1) return;
 856
 857         source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
 858
 859         cr = cairo_create (source);
 860         cairo_set_source_rgb(cr, 0, 0, 0);
 861         cairo_rectangle (cr, 0, 0, w, h);
 862         cairo_fill (cr);
 863         cairo_set_source_rgb(cr, 1, 1, 1);
 864         pango_cairo_show_layout (cr, layout);
 865         cairo_destroy (cr);
 866
 867         buffer = gdk_pixbuf_new_from_data (cairo_image_surface_get_data (source),
 868                                            GDK_COLORSPACE_RGB,
 869                                            cairo_image_surface_get_format (source) == CAIRO_FORMAT_ARGB32,
 870                                            8,
 871                                            cairo_image_surface_get_width (source),
 872                                            cairo_image_surface_get_height (source),
 873                                            cairo_image_surface_get_stride (source),
 874                                            NULL,
 875                                            NULL);
 876
 877         sx = 0;
 878         sy = 0;
 879         dw = gdk_pixbuf_get_width(pixbuf);
 880         dh = gdk_pixbuf_get_height(pixbuf);
 881
 882         if (x < 0)
 883                 {
 884                 w += x;
 885                 sx = -x;
 886                 x = 0;
 887                 }
 888
 889         if (y < 0)
 890                 {
 891                 h += y;
 892                 sy = -y;
 893                 y = 0;
 894                 }
 895
 896         if (x + w > dw) w = dw - x;
 897         if (y + h > dh) h = dh - y;
 898
 899         pixbuf_copy_font(buffer, sx, sy,
 900                          pixbuf, x, y, w, h,
 901                          r, g, b, a);
 902
 903         g_object_unref(buffer);
 904         cairo_surface_destroy(source);
 905 }
 906
 907 /*
 908  *-----------------------------------------------------------------------------
 909  * pixbuf drawing (triangle)
 910  *-----------------------------------------------------------------------------
 911  */
 912
 913 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 914                         gint *rx, gint *ry, gint *rw, gint *rh)
 915 {
 916         gint tx, ty, tw, th;
 917
 918         tx = MIN(x1, x2);
 919         tx = MIN(tx, x3);
 920         ty = MIN(y1, y2);
 921         ty = MIN(ty, y3);
 922         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 923         tw = MAX(tw, abs(x3 - x1));
 924         th = MAX(abs(y1 - y2), abs(y2 - y3));
 925         th = MAX(th, abs(y3 - y1));
 926
 927         *rx = tx;
 928         *ry = ty;
 929         *rw = tw;
 930         *rh = th;
 931 }
 932
 933 void pixbuf_draw_triangle(GdkPixbuf *pb,
 934                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 935                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 936                           guint8 r, guint8 g, guint8 b, guint8 a)
 937 {
 938         gboolean has_alpha;
 939         gint pw, ph, prs;
 940         gint rx, ry, rw, rh;
 941         gint tx, ty, tw, th;
 942         gint fx1, fy1;
 943         gint fx2, fy2;
 944         gint fw, fh;
 945         guchar *p_pix;
 946         guchar *pp;
 947         gint p_step;
 948         gdouble slope1, slope2;
 949         gint slope1_x, slope1_y;
 950         gint y;
 951         gint t;
 952         gboolean middle = FALSE;
 953
 954         if (!pb) return;
 955
 956         pw = gdk_pixbuf_get_width(pb);
 957         ph = gdk_pixbuf_get_height(pb);
 958
 959         if (!util_clip_region(0, 0, pw, ph,
 960                               clip_x, clip_y, clip_w, clip_h,
 961                               &rx, &ry, &rw, &rh)) return;
 962
 963         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 964                            &tx, &ty, &tw, &th);
 965
 966         if (!util_clip_region(rx, ry, rw, rh,
 967                               tx, ty, tw, th,
 968                               &fx1, &fy1, &fw, &fh)) return;
 969         fx2 = fx1 + fw;
 970         fy2 = fy1 + fh;
 971
 972         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 973         prs = gdk_pixbuf_get_rowstride(pb);
 974         p_pix = gdk_pixbuf_get_pixels(pb);
 975
 976         p_step = (has_alpha) ? 4 : 3;
 977
 978         if (y1 > y2)
 979                 {
 980                 t = x1; x1 = x2; x2 = t;
 981                 t = y1; y1 = y2; y2 = t;
 982                 }
 983         if (y2 > y3)
 984                 {
 985                 t = x2; x2 = x3; x3 = t;
 986                 t = y2; y2 = y3; y3 = t;
 987                 }
 988         if (y1 > y2)
 989                 {
 990                 t = x1; x1 = x2; x2 = t;
 991                 t = y1; y1 = y2; y2 = t;
 992                 }
 993
 994         slope1 = (gdouble)(y2 - y1);
 995         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
 996         slope1_x = x1;
 997         slope1_y = y1;
 998         slope2 = (gdouble)(y3 - y1);
 999         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
1000
1001         for (y = fy1; y < fy2; y++)
1002                 {
1003                 gint xa, xb;
1004
1005                 if (!middle && y > y2)
1006                         {
1007                         slope1 = (gdouble)(y3 - y2);
1008                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
1009                         slope1_x = x2;
1010                         slope1_y = y2;
1011
1012                         middle = TRUE;
1013                         }
1014
1015                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
1016                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
1017
1018                 if (xa > xb)
1019                         {
1020                         t = xa; xa = xb; xb = t;
1021                         }
1022
1023                 xa = CLAMP(xa, fx1, fx2);
1024                 xb = CLAMP(xb, fx1, fx2);
1025
1026                 pp = p_pix + y * prs + xa * p_step;
1027
1028                 while (xa < xb)
1029                         {
1030                         *pp = (r * a + *pp * (256-a)) >> 8;
1031                         pp++;
1032                         *pp = (g * a + *pp * (256-a)) >> 8;
1033                         pp++;
1034                         *pp = (b * a + *pp * (256-a)) >> 8;
1035                         pp++;
1036                         if (has_alpha) pp++;
1037
1038                         xa++;
1039                         }
1040                 }
1041 }
1042
1043 /*
1044  *-----------------------------------------------------------------------------
1045  * pixbuf drawing (line)
1046  *-----------------------------------------------------------------------------
1047  */
1048
1049 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
1050                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
1051                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
1052 {
1053         gboolean flip = FALSE;
1054         gdouble d;
1055
1056         if (x1 > x2)
1057                 {
1058                 gdouble t;
1059
1060                 t = x1; x1 = x2; x2 = t;
1061                 t = y1; y1 = y2; y2 = t;
1062                 flip = TRUE;
1063                 }
1064
1065         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
1066
1067         if (y1 < y2)
1068                 {
1069                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1070                 }
1071         else
1072                 {
1073                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1074                 }
1075
1076         d = x2 - x1;
1077         if (d > 0.0)
1078                 {
1079                 gdouble slope;
1080
1081                 slope = (y2 - y1) / d;
1082                 if (x1 < clip_x)
1083                         {
1084                         y1 = y1 + slope * (clip_x - x1);
1085                         x1 = clip_x;
1086                         }
1087                 if (x2 > clip_x + clip_w)
1088                         {
1089                         y2 = y2 + slope * (clip_x + clip_w - x2);
1090                         x2 = clip_x + clip_w;
1091                         }
1092                 }
1093
1094         if (y1 < y2)
1095                 {
1096                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1097                 }
1098         else
1099                 {
1100                 gdouble t;
1101
1102                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1103
1104                 t = x1; x1 = x2; x2 = t;
1105                 t = y1; y1 = y2; y2 = t;
1106                 flip = !flip;
1107                 }
1108
1109         d = y2 - y1;
1110         if (d > 0.0)
1111                 {
1112                 gdouble slope;
1113
1114                 slope = (x2 - x1) / d;
1115                 if (y1 < clip_y)
1116                         {
1117                         x1 = x1 + slope * (clip_y - y1);
1118                         y1 = clip_y;
1119                         }
1120                 if (y2 > clip_y + clip_h)
1121                         {
1122                         x2 = x2 + slope * (clip_y + clip_h - y2);
1123                         y2 = clip_y + clip_h;
1124                         }
1125                 }
1126
1127         if (flip)
1128                 {
1129                 *rx1 = x2;
1130                 *ry1 = y2;
1131                 *rx2 = x1;
1132                 *ry2 = y1;
1133                 }
1134         else
1135                 {
1136                 *rx1 = x1;
1137                 *ry1 = y1;
1138                 *rx2 = x2;
1139                 *ry2 = y2;
1140                 }
1141
1142         return TRUE;
1143 }
1144
1145 void pixbuf_draw_line(GdkPixbuf *pb,
1146                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1147                       gint x1, gint y1, gint x2, gint y2,
1148                       guint8 r, guint8 g, guint8 b, guint8 a)
1149 {
1150         gboolean has_alpha;
1151         gint pw, ph, prs;
1152         gint rx, ry, rw, rh;
1153         gdouble rx1, ry1, rx2, ry2;
1154         guchar *p_pix;
1155         guchar *pp;
1156         gint p_step;
1157         gdouble slope;
1158         gdouble x, y;
1159         gint px, py;
1160         gint cx1, cy1, cx2, cy2;
1161
1162         if (!pb) return;
1163
1164         pw = gdk_pixbuf_get_width(pb);
1165         ph = gdk_pixbuf_get_height(pb);
1166
1167         if (!util_clip_region(0, 0, pw, ph,
1168                               clip_x, clip_y, clip_w, clip_h,
1169                               &rx, &ry, &rw, &rh)) return;
1170         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
1171                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
1172                             &rx1, &ry1, &rx2, &ry2)) return;
1173
1174         cx1 = rx;
1175         cy1 = ry;
1176         cx2 = rx + rw;
1177         cy2 = ry + rh;
1178
1179         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1180         prs = gdk_pixbuf_get_rowstride(pb);
1181         p_pix = gdk_pixbuf_get_pixels(pb);
1182
1183         p_step = (has_alpha) ? 4 : 3;
1184
1185         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1186                 {
1187                 if (rx1 > rx2)
1188                         {
1189                         gdouble t;
1190                         t = rx1; rx1 = rx2; rx2 = t;
1191                         t = ry1; ry1 = ry2; ry2 = t;
1192                         }
1193
1194                 slope = rx2 - rx1;
1195                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1196                 for (x = rx1; x < rx2; x += 1.0)
1197                         {
1198                         px = (gint)(x + 0.5);
1199                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1200
1201                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1202                                 {
1203                                 pp = p_pix + py * prs + px * p_step;
1204                                 *pp = (r * a + *pp * (256-a)) >> 8;
1205                                 pp++;
1206                                 *pp = (g * a + *pp * (256-a)) >> 8;
1207                                 pp++;
1208                                 *pp = (b * a + *pp * (256-a)) >> 8;
1209                                 }
1210                         }
1211                 }
1212         else
1213                 {
1214                 if (ry1 > ry2)
1215                         {
1216                         gdouble t;
1217                         t = rx1; rx1 = rx2; rx2 = t;
1218                         t = ry1; ry1 = ry2; ry2 = t;
1219                         }
1220
1221                 slope = ry2 - ry1;
1222                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1223                 for (y = ry1; y < ry2; y += 1.0)
1224                         {
1225                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1226                         py = (gint)(y + 0.5);
1227
1228                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1229                                 {
1230                                 pp = p_pix + py * prs + px * p_step;
1231                                 *pp = (r * a + *pp * (256-a)) >> 8;
1232                                 pp++;
1233                                 *pp = (g * a + *pp * (256-a)) >> 8;
1234                                 pp++;
1235                                 *pp = (b * a + *pp * (256-a)) >> 8;
1236                                 }
1237                         }
1238                 }
1239 }
1240
1241 /*
1242  *-----------------------------------------------------------------------------
1243  * pixbuf drawing (fades and shadows)
1244  *-----------------------------------------------------------------------------
1245  */
1246
1247 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1248                                     gint s, gboolean vertical, gint border,
1249                                     gint x1, gint y1, gint x2, gint y2,
1250                                     guint8 r, guint8 g, guint8 b, guint8 a)
1251 {
1252         guchar *pp;
1253         gint p_step;
1254         guint8 n = a;
1255         gint i, j;
1256
1257         p_step = (has_alpha) ? 4 : 3;
1258         for (j = y1; j < y2; j++)
1259                 {
1260                 pp = p_pix + j * prs + x1 * p_step;
1261                 if (!vertical) n = a - a * abs(j - s) / border;
1262                 for (i = x1; i < x2; i++)
1263                         {
1264                         if (vertical) n = a - a * abs(i - s) / border;
1265                         *pp = (r * n + *pp * (256-n)) >> 8;
1266                         pp++;
1267                         *pp = (g * n + *pp * (256-n)) >> 8;
1268                         pp++;
1269                         *pp = (b * n + *pp * (256-n)) >> 8;
1270                         pp++;
1271                         if (has_alpha) pp++;
1272                         }
1273                 }
1274 }
1275
1276 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1277                                     gint sx, gint sy, gint border,
1278                                     gint x1, gint y1, gint x2, gint y2,
1279                                     guint8 r, guint8 g, guint8 b, guint8 a)
1280 {
1281         guchar *pp;
1282         gint p_step;
1283         gint i, j;
1284
1285         p_step = (has_alpha) ? 4 : 3;
1286         for (j = y1; j < y2; j++)
1287                 {
1288                 pp = p_pix + j * prs + x1 * p_step;
1289                 for (i = x1; i < x2; i++)
1290                         {
1291                         guint8 n;
1292                         gint r;
1293
1294                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1295                         n = a - a * r / border;
1296                         *pp = (r * n + *pp * (256-n)) >> 8;
1297                         pp++;
1298                         *pp = (g * n + *pp * (256-n)) >> 8;
1299                         pp++;
1300                         *pp = (b * n + *pp * (256-n)) >> 8;
1301                         pp++;
1302                         if (has_alpha) pp++;
1303                         }
1304                 }
1305 }
1306
1307 void pixbuf_draw_shadow(GdkPixbuf *pb,
1308                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1309                         gint x, gint y, gint w, gint h, gint border,
1310                         guint8 r, guint8 g, guint8 b, guint8 a)
1311 {
1312         gint has_alpha;
1313         gint pw, ph, prs;
1314         gint rx, ry, rw, rh;
1315         gint fx, fy, fw, fh;
1316         guchar *p_pix;
1317
1318         if (!pb) return;
1319
1320         pw = gdk_pixbuf_get_width(pb);
1321         ph = gdk_pixbuf_get_height(pb);
1322
1323         if (!util_clip_region(0, 0, pw, ph,
1324                               clip_x, clip_y, clip_w, clip_h,
1325                               &rx, &ry, &rw, &rh)) return;
1326
1327         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1328         prs = gdk_pixbuf_get_rowstride(pb);
1329         p_pix = gdk_pixbuf_get_pixels(pb);
1330
1331         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1332                              rx, ry, rw, rh,
1333                              &fx, &fy, &fw, &fh))
1334                 {
1335                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1336                 }
1337
1338         if (border < 1) return;
1339
1340         if (util_clip_region(x, y + border, border, h - border * 2,
1341                              rx, ry, rw, rh,
1342                              &fx, &fy, &fw, &fh))
1343                 {
1344                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1345                                         x + border, TRUE, border,
1346                                         fx, fy, fx + fw, fy + fh,
1347                                         r, g, b, a);
1348                 }
1349         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1350                              rx, ry, rw, rh,
1351                              &fx, &fy, &fw, &fh))
1352                 {
1353                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1354                                         x + w - border, TRUE, border,
1355                                         fx, fy, fx + fw, fy + fh,
1356                                         r, g, b, a);
1357                 }
1358         if (util_clip_region(x + border, y, w - border * 2, border,
1359                              rx, ry, rw, rh,
1360                              &fx, &fy, &fw, &fh))
1361                 {
1362                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1363                                         y + border, FALSE, border,
1364                                         fx, fy, fx + fw, fy + fh,
1365                                         r, g, b, a);
1366                 }
1367         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1368                              rx, ry, rw, rh,
1369                              &fx, &fy, &fw, &fh))
1370                 {
1371                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1372                                         y + h - border, FALSE, border,
1373                                         fx, fy, fx + fw, fy + fh,
1374                                         r, g, b, a);
1375                 }
1376         if (util_clip_region(x, y, border, border,
1377                              rx, ry, rw, rh,
1378                              &fx, &fy, &fw, &fh))
1379                 {
1380                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1381                                         x + border, y + border, border,
1382                                         fx, fy, fx + fw, fy + fh,
1383                                         r, g, b, a);
1384                 }
1385         if (util_clip_region(x + w - border, y, border, border,
1386                              rx, ry, rw, rh,
1387                              &fx, &fy, &fw, &fh))
1388                 {
1389                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1390                                         x + w - border, y + border, border,
1391                                         fx, fy, fx + fw, fy + fh,
1392                                         r, g, b, a);
1393                 }
1394         if (util_clip_region(x, y + h - border, border, border,
1395                              rx, ry, rw, rh,
1396                              &fx, &fy, &fw, &fh))
1397                 {
1398                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1399                                         x + border, y + h - border, border,
1400                                         fx, fy, fx + fw, fy + fh,
1401                                         r, g, b, a);
1402                 }
1403         if (util_clip_region(x + w - border, y + h - border, border, border,
1404                              rx, ry, rw, rh,
1405                              &fx, &fy, &fw, &fh))
1406                 {
1407                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1408                                         x + w - border, y + h - border, border,
1409                                         fx, fy, fx + fw, fy + fh,
1410                                         r, g, b, a);
1411                 }
1412 }
1413
1414
1415 /*
1416  *-----------------------------------------------------------------------------
1417  * pixbuf color alterations
1418  *-----------------------------------------------------------------------------
1419  */
1420
1421 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1422                             gint x, gint y, gint w, gint h)
1423 {
1424         gboolean has_alpha;
1425         gint pw, ph, prs;
1426         guchar *p_pix;
1427         guchar *pp;
1428         gint i, j;
1429
1430         if (!pb) return;
1431
1432         pw = gdk_pixbuf_get_width(pb);
1433         ph = gdk_pixbuf_get_height(pb);
1434
1435         if (x < 0 || x + w > pw) return;
1436         if (y < 0 || y + h > ph) return;
1437
1438         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1439         prs = gdk_pixbuf_get_rowstride(pb);
1440         p_pix = gdk_pixbuf_get_pixels(pb);
1441
1442         for (i = 0; i < h; i++)
1443                 {
1444                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1445                 for (j = 0; j < w; j++)
1446                         {
1447                         guint8 grey;
1448
1449                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1450                         *pp = grey;
1451                         pp++;
1452                         *pp = grey;
1453                         pp++;
1454                         *pp = grey;
1455                         pp++;
1456                         if (has_alpha) pp++;
1457                         }
1458                 }
1459 }
1460 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */