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