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         { PIXBUF_INLINE_ICON_HEIF,      icon_heic },
 150         { PIXBUF_INLINE_ICON_GRAYSCALE, icon_grayscale },
 151         { PIXBUF_INLINE_ICON_EXPOSURE,  icon_exposure },
 152         { PIXBUF_INLINE_SPLIT_PANE_SYNC, icon_split_pane_sync },
 153         { NULL, NULL }
 154 };
 155
 156 GdkPixbuf *pixbuf_inline(const gchar *key)
 157 {
 158         gint i;
 159
 160         if (!key) return NULL;
 161
 162         i = 0;
 163         while (inline_pixbuf_data[i].key)
 164                 {
 165                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 166                         {
 167                         return gdk_pixbuf_new_from_inline(-1, inline_pixbuf_data[i].data, FALSE, NULL);
 168                         }
 169                 i++;
 170                 }
 171
 172         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 173
 174         return NULL;
 175 }
 176
 177 static void register_stock_icon(const gchar *key, GdkPixbuf *pixbuf)
 178 {
 179         static GtkIconFactory *icon_factory = NULL;
 180         GtkIconSet *icon_set;
 181
 182         if (!icon_factory)
 183                 {
 184                 icon_factory = gtk_icon_factory_new();
 185                 gtk_icon_factory_add_default(icon_factory);
 186                 }
 187
 188         icon_set = gtk_icon_set_new_from_pixbuf(pixbuf);
 189         gtk_icon_factory_add(icon_factory, key, icon_set);
 190 }
 191
 192
 193 void pixbuf_inline_register_stock_icons(void)
 194 {
 195         gint i;
 196
 197         i = 0;
 198         while (inline_pixbuf_data[i].key)
 199                 {
 200                 register_stock_icon(inline_pixbuf_data[i].key, pixbuf_inline(inline_pixbuf_data[i].key));
 201                 i++;
 202                 }
 203 }
 204
 205 gboolean register_theme_icon_as_stock(const gchar *key, const gchar *icon)
 206 {
 207         GtkIconTheme *icon_theme;
 208         GdkPixbuf *pixbuf;
 209         GError *error = NULL;
 210
 211         icon_theme = gtk_icon_theme_get_default();
 212
 213         if (gtk_icon_theme_has_icon(icon_theme, key)) return FALSE;
 214
 215         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 216                            icon, /* icon name */
 217                            64, /* size */
 218                            0,  /* flags */
 219                            &error);
 220         if (!pixbuf)
 221                 {
 222                 if (error)
 223                         {
 224                         DEBUG_1("Couldn't load icon %s: %s", icon, error->message);
 225                         g_error_free(error);
 226                         error = NULL;
 227                         }
 228
 229                 if (strchr(icon, '.'))
 230                         {
 231                         /* try again without extension */
 232                         gchar *icon2 = remove_extension_from_path(icon);
 233                         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 234                                            icon2, /* icon name */
 235                                            64, /* size */
 236                                            0,  /* flags */
 237                                            &error);
 238                         if (error)
 239                                 {
 240                                 DEBUG_1("Couldn't load icon %s: %s", icon2, error->message);
 241                                 g_error_free(error);
 242                                 error = NULL;
 243
 244                                 /* try as an absolute path */
 245                                 pixbuf = gdk_pixbuf_new_from_file(icon, &error);
 246                                 if (error)
 247                                         {
 248                                         DEBUG_1("Couldn't load icon as absolute path %s: %s", icon, error->message);
 249                                         g_error_free(error);
 250                                         }
 251                                 }
 252                         g_free(icon2);
 253                         }
 254                 }
 255
 256         if (!pixbuf) return FALSE;
 257
 258         register_stock_icon(key, pixbuf);
 259         return TRUE;
 260 }
 261
 262 gboolean pixbuf_scale_aspect(gint req_w, gint req_h,
 263                              gint old_w, gint old_h,
 264                              gint *new_w, gint *new_h)
 265 {
 266         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 267                 {
 268                 *new_w = req_w;
 269                 *new_h = (gdouble)*new_w / old_w * old_h;
 270                 if (*new_h < 1) *new_h = 1;
 271                 }
 272         else
 273                 {
 274                 *new_h = req_h;
 275                 *new_w = (gdouble)*new_h / old_h * old_w;
 276                 if (*new_w < 1) *new_w = 1;
 277                 }
 278
 279         return (*new_w != old_w || *new_h != old_h);
 280 }
 281
 282 GdkPixbuf *pixbuf_fallback(FileData *fd, gint requested_width, gint requested_height)
 283 {
 284         GdkPixbuf *pixbuf;
 285
 286         switch (fd->format_class)
 287                 {
 288                 case FORMAT_CLASS_UNKNOWN:
 289                         pixbuf = pixbuf_inline(PIXBUF_INLINE_UNKNOWN);
 290                         break;
 291                 case FORMAT_CLASS_META:
 292                         pixbuf = pixbuf_inline(PIXBUF_INLINE_METADATA);
 293                         break;
 294                 case FORMAT_CLASS_VIDEO:
 295                         pixbuf = pixbuf_inline(PIXBUF_INLINE_VIDEO);
 296                         break;
 297                 case FORMAT_CLASS_COLLECTION:
 298                         pixbuf = pixbuf_inline(PIXBUF_INLINE_COLLECTION);
 299                         break;
 300                 case FORMAT_CLASS_DOCUMENT:
 301                         pixbuf = pixbuf_inline(PIXBUF_INLINE_ICON_PDF);
 302                         break;
 303                 default:
 304                         pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 305                 }
 306
 307         if (requested_width && requested_height)
 308                 {
 309                 gint w = gdk_pixbuf_get_width(pixbuf);
 310                 gint h = gdk_pixbuf_get_height(pixbuf);
 311
 312                 if (w > requested_width || h > requested_height)
 313                         {
 314                         gint nw, nh;
 315
 316                         if (pixbuf_scale_aspect(requested_width, requested_height,
 317                                                           w, h, &nw, &nh))
 318                                 {
 319                                 GdkPixbuf *tmp;
 320
 321                                 tmp = pixbuf;
 322                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 323                                 g_object_unref(G_OBJECT(tmp));
 324                                 }
 325                         }
 326                 }
 327         return pixbuf;
 328 }
 329
 330
 331 /*
 332  *-----------------------------------------------------------------------------
 333  * misc utils
 334  *-----------------------------------------------------------------------------
 335  */
 336
 337 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 338                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 339                           gint *rx, gint *ry, gint *rw, gint *rh)
 340 {
 341         if (clip_x + clip_w <= x ||
 342             clip_x >= x + w ||
 343             clip_y + clip_h <= y ||
 344             clip_y >= y + h)
 345                 {
 346                 return FALSE;
 347                 }
 348
 349         *rx = MAX(x, clip_x);
 350         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 351
 352         *ry = MAX(y, clip_y);
 353         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 354
 355         return TRUE;
 356 }
 357
 358 /*
 359  *-----------------------------------------------------------------------------
 360  * pixbuf rotation
 361  *-----------------------------------------------------------------------------
 362  */
 363
 364 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 365                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 366                                      gint bytes_per_pixel, gboolean counter_clockwise)
 367 {
 368         gint i, j;
 369         guchar *sp;
 370         guchar *dp;
 371
 372         for (i = 0; i < h; i++)
 373                 {
 374                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 375                 for (j = 0; j < w; j++)
 376                         {
 377                         if (counter_clockwise)
 378                                 {
 379                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 380                                 }
 381                         else
 382                                 {
 383                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 384                                 }
 385                         *(dp++) = *(sp++);      /* r */
 386                         *(dp++) = *(sp++);      /* g */
 387                         *(dp++) = *(sp++);      /* b */
 388                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 389                         }
 390                 }
 391
 392 }
 393
 394 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 395                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 396 {
 397         gint i;
 398         guchar *sp;
 399         guchar *dp;
 400
 401         for (i = 0; i < h; i++)
 402                 {
 403                 sp = src + (i * src_row_stride);
 404                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 405                 memcpy(dp, sp, w * bytes_per_pixel);
 406                 }
 407 }
 408
 409 #define ROTATE_BUFFER_WIDTH 48
 410 #define ROTATE_BUFFER_HEIGHT 48
 411
 412 /*
 413  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 414  *
 415  */
 416 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 417 {
 418         GdkPixbuf *dest;
 419         gboolean has_alpha;
 420         gint sw, sh, srs;
 421         gint dw, dh, drs;
 422         guchar *s_pix;
 423         guchar *d_pix;
 424         gint i, j;
 425         gint a;
 426         GdkPixbuf *buffer;
 427         guchar *b_pix;
 428         gint brs;
 429         gint w, h;
 430
 431         if (!src) return NULL;
 432
 433         sw = gdk_pixbuf_get_width(src);
 434         sh = gdk_pixbuf_get_height(src);
 435         has_alpha = gdk_pixbuf_get_has_alpha(src);
 436         srs = gdk_pixbuf_get_rowstride(src);
 437         s_pix = gdk_pixbuf_get_pixels(src);
 438
 439         dw = sh;
 440         dh = sw;
 441         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 442         drs = gdk_pixbuf_get_rowstride(dest);
 443         d_pix = gdk_pixbuf_get_pixels(dest);
 444
 445         a = (has_alpha ? 4 : 3);
 446
 447         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 448                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 449         b_pix = gdk_pixbuf_get_pixels(buffer);
 450         brs = gdk_pixbuf_get_rowstride(buffer);
 451
 452         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 453                 {
 454                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 455                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 456                         {
 457                         gint x, y;
 458
 459                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 460                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 461                                                  b_pix, brs, h, w,
 462                                                  a, counter_clockwise);
 463
 464                         if (counter_clockwise)
 465                                 {
 466                                 x = i;
 467                                 y = sw - h - j;
 468                                 }
 469                         else
 470                                 {
 471                                 x = sh - w - i;
 472                                 y = j;
 473                                 }
 474                         pixbuf_copy_block(b_pix, brs, w, h,
 475                                           d_pix, drs, x, y, a);
 476                         }
 477                 }
 478
 479         g_object_unref(buffer);
 480
 481 #if 0
 482         /* this is the simple version of rotation (roughly 2-4x slower) */
 483
 484         for (i = 0; i < sh; i++)
 485                 {
 486                 sp = s_pix + (i * srs);
 487                 for (j = 0; j < sw; j++)
 488                         {
 489                         if (counter_clockwise)
 490                                 {
 491                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 492                                 }
 493                         else
 494                                 {
 495                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 496                                 }
 497
 498                         *(dp++) = *(sp++);      /* r */
 499                         *(dp++) = *(sp++);      /* g */
 500                         *(dp++) = *(sp++);      /* b */
 501                         if (has_alpha) *(dp) = *(sp++); /* a */
 502                         }
 503                 }
 504 #endif
 505
 506         return dest;
 507 }
 508
 509 /*
 510  * Returns a copy of pixbuf mirrored and or flipped.
 511  * TO do a 180 degree rotations set both mirror and flipped TRUE
 512  * if mirror and flip are FALSE, result is a simple copy.
 513  */
 514 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 515 {
 516         GdkPixbuf *dest;
 517         gboolean has_alpha;
 518         gint w, h, srs;
 519         gint drs;
 520         guchar *s_pix;
 521         guchar *d_pix;
 522         guchar *sp;
 523         guchar *dp;
 524         gint i, j;
 525         gint a;
 526
 527         if (!src) return NULL;
 528
 529         w = gdk_pixbuf_get_width(src);
 530         h = gdk_pixbuf_get_height(src);
 531         has_alpha = gdk_pixbuf_get_has_alpha(src);
 532         srs = gdk_pixbuf_get_rowstride(src);
 533         s_pix = gdk_pixbuf_get_pixels(src);
 534
 535         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 536         drs = gdk_pixbuf_get_rowstride(dest);
 537         d_pix = gdk_pixbuf_get_pixels(dest);
 538
 539         a = has_alpha ? 4 : 3;
 540
 541         for (i = 0; i < h; i++)
 542                 {
 543                 sp = s_pix + (i * srs);
 544                 if (flip)
 545                         {
 546                         dp = d_pix + ((h - i - 1) * drs);
 547                         }
 548                 else
 549                         {
 550                         dp = d_pix + (i * drs);
 551                         }
 552                 if (mirror)
 553                         {
 554                         dp += (w - 1) * a;
 555                         for (j = 0; j < w; j++)
 556                                 {
 557                                 *(dp++) = *(sp++);      /* r */
 558                                 *(dp++) = *(sp++);      /* g */
 559                                 *(dp++) = *(sp++);      /* b */
 560                                 if (has_alpha) *(dp) = *(sp++); /* a */
 561                                 dp -= (a + 3);
 562                                 }
 563                         }
 564                 else
 565                         {
 566                         for (j = 0; j < w; j++)
 567                                 {
 568                                 *(dp++) = *(sp++);      /* r */
 569                                 *(dp++) = *(sp++);      /* g */
 570                                 *(dp++) = *(sp++);      /* b */
 571                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 572                                 }
 573                         }
 574                 }
 575
 576         return dest;
 577 }
 578
 579 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 580 {
 581         GdkPixbuf *dest;
 582         GdkPixbuf *tmp = NULL;
 583
 584         switch (orientation)
 585                 {
 586                 case EXIF_ORIENTATION_TOP_LEFT:
 587                         dest = gdk_pixbuf_copy(pixbuf);
 588                         break;
 589                 case EXIF_ORIENTATION_TOP_RIGHT:
 590                         /* mirrored */
 591                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 592                         break;
 593                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 594                         /* upside down */
 595                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 596                         break;
 597                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 598                         /* flipped */
 599                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 600                         break;
 601                 case EXIF_ORIENTATION_LEFT_TOP:
 602                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 603                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 604                         break;
 605                 case EXIF_ORIENTATION_RIGHT_TOP:
 606                         /* rotated -90 (270) */
 607                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 608                         break;
 609                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 610                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 611                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 612                         break;
 613                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 614                         /* rotated 90 */
 615                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 616                         break;
 617                 default:
 618                         dest = gdk_pixbuf_copy(pixbuf);
 619                         break;
 620                 }
 621         if (tmp) g_object_unref(tmp);
 622         return dest;
 623
 624 }
 625
 626
 627 /*
 628  *-----------------------------------------------------------------------------
 629  * pixbuf drawing (rectangles)
 630  *-----------------------------------------------------------------------------
 631  */
 632
 633 /*
 634  * Fills region of pixbuf at x,y over w,h
 635  * with colors red (r), green (g), blue (b)
 636  * applying alpha (a), use a=255 for solid.
 637  */
 638 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 639                            gint x, gint y, gint w, gint h,
 640                            gint r, gint g, gint b, gint a)
 641 {
 642         gboolean has_alpha;
 643         gint pw, ph, prs;
 644         guchar *p_pix;
 645         guchar *pp;
 646         gint i, j;
 647
 648         if (!pb) return;
 649
 650         pw = gdk_pixbuf_get_width(pb);
 651         ph = gdk_pixbuf_get_height(pb);
 652
 653         if (x < 0 || x + w > pw) return;
 654         if (y < 0 || y + h > ph) return;
 655
 656         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 657         prs = gdk_pixbuf_get_rowstride(pb);
 658         p_pix = gdk_pixbuf_get_pixels(pb);
 659
 660         for (i = 0; i < h; i++)
 661                 {
 662                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 663                 for (j = 0; j < w; j++)
 664                         {
 665                         *pp = (r * a + *pp * (256-a)) >> 8;
 666                         pp++;
 667                         *pp = (g * a + *pp * (256-a)) >> 8;
 668                         pp++;
 669                         *pp = (b * a + *pp * (256-a)) >> 8;
 670                         pp++;
 671                         if (has_alpha) pp++;
 672                         }
 673                 }
 674 }
 675
 676 void pixbuf_draw_rect(GdkPixbuf *pb,
 677                       gint x, gint y, gint w, gint h,
 678                       gint r, gint g, gint b, gint a,
 679                       gint left, gint right, gint top, gint bottom)
 680 {
 681         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 682                               r, g, b ,a);
 683         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 684                               r, g, b ,a);
 685         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 686                               r, g, b ,a);
 687         pixbuf_draw_rect_fill(pb, x, y, left, h,
 688                               r, g, b ,a);
 689 }
 690
 691 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 692                           gint x, gint y, gint w, gint h,
 693                           gint r, gint g, gint b, gint a)
 694 {
 695         gboolean has_alpha;
 696         gint pw, ph, prs;
 697         guchar *p_pix;
 698         guchar *pp;
 699         gint i, j;
 700
 701         if (!pb) return;
 702
 703         pw = gdk_pixbuf_get_width(pb);
 704         ph = gdk_pixbuf_get_height(pb);
 705
 706         if (x < 0 || x + w > pw) return;
 707         if (y < 0 || y + h > ph) return;
 708
 709         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 710         prs = gdk_pixbuf_get_rowstride(pb);
 711         p_pix = gdk_pixbuf_get_pixels(pb);
 712
 713         for (i = 0; i < h; i++)
 714                 {
 715                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 716                 for (j = 0; j < w; j++)
 717                         {
 718                         *pp = r; pp++;
 719                         *pp = g; pp++;
 720                         *pp = b; pp++;
 721                         if (has_alpha) { *pp = a; pp++; }
 722                         }
 723                 }
 724 }
 725
 726 void pixbuf_set_rect(GdkPixbuf *pb,
 727                      gint x, gint y, gint w, gint h,
 728                      gint r, gint g, gint b, gint a,
 729                      gint left, gint right, gint top, gint bottom)
 730 {
 731         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 732                              r, g, b ,a);
 733         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 734                              r, g, b ,a);
 735         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 736                              r, g, b ,a);
 737         pixbuf_set_rect_fill(pb, x, y, left, h,
 738                              r, g, b ,a);
 739 }
 740
 741 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 742 {
 743         guchar *buf;
 744         gboolean has_alpha;
 745         gint rowstride;
 746         guchar *p;
 747
 748         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 749             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 750
 751         buf = gdk_pixbuf_get_pixels(pb);
 752         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 753         rowstride = gdk_pixbuf_get_rowstride(pb);
 754
 755         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 756         *p = r; p++;
 757         *p = g; p++;
 758         *p = b; p++;
 759         if (has_alpha) *p = a;
 760 }
 761
 762
 763 /*
 764  *-----------------------------------------------------------------------------
 765  * pixbuf text rendering
 766  *-----------------------------------------------------------------------------
 767  */
 768
 769 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 770                              GdkPixbuf *dest, gint dx, gint dy,
 771                              gint w, gint h,
 772                              guint8 r, guint8 g, guint8 b, guint8 a)
 773 {
 774         gint sw, sh, srs;
 775         gboolean s_alpha;
 776         gint s_step;
 777         guchar *s_pix;
 778         gint dw, dh, drs;
 779         gboolean d_alpha;
 780         gint d_step;
 781         guchar *d_pix;
 782
 783         guchar *sp;
 784         guchar *dp;
 785         gint i, j;
 786
 787         if (!src || !dest) return;
 788
 789         sw = gdk_pixbuf_get_width(src);
 790         sh = gdk_pixbuf_get_height(src);
 791
 792         if (sx < 0 || sx + w > sw) return;
 793         if (sy < 0 || sy + h > sh) return;
 794
 795         dw = gdk_pixbuf_get_width(dest);
 796         dh = gdk_pixbuf_get_height(dest);
 797
 798         if (dx < 0 || dx + w > dw) return;
 799         if (dy < 0 || dy + h > dh) return;
 800
 801         s_alpha = gdk_pixbuf_get_has_alpha(src);
 802         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 803         srs = gdk_pixbuf_get_rowstride(src);
 804         drs = gdk_pixbuf_get_rowstride(dest);
 805         s_pix = gdk_pixbuf_get_pixels(src);
 806         d_pix = gdk_pixbuf_get_pixels(dest);
 807
 808         s_step = (s_alpha) ? 4 : 3;
 809         d_step = (d_alpha) ? 4 : 3;
 810
 811         for (i = 0; i < h; i++)
 812                 {
 813                 sp = s_pix + (sy + i) * srs + sx * s_step;
 814                 dp = d_pix + (dy + i) * drs + dx * d_step;
 815                 for (j = 0; j < w; j++)
 816                         {
 817                         if (*sp)
 818                                 {
 819                                 guint8 asub;
 820
 821                                 asub = a * sp[0] / 255;
 822                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 823                                 dp++;
 824                                 asub = a * sp[1] / 255;
 825                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 826                                 dp++;
 827                                 asub = a * sp[2] / 255;
 828                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 829                                 dp++;
 830
 831                                 if (d_alpha)
 832                                         {
 833                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 834                                         dp++;
 835                                         }
 836                                 }
 837                         else
 838                                 {
 839                                 dp += d_step;
 840                                 }
 841
 842                         sp += s_step;
 843                         }
 844                 }
 845 }
 846
 847 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 848                         gint x, gint y,
 849                         guint8 r, guint8 g, guint8 b, guint8 a)
 850 {
 851         GdkPixbuf *buffer;
 852         gint w, h;
 853         gint sx, sy;
 854         gint dw, dh;
 855         cairo_surface_t *source;
 856         cairo_t *cr;
 857
 858         pango_layout_get_pixel_size(layout, &w, &h);
 859         if (w < 1 || h < 1) return;
 860
 861         source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
 862
 863         cr = cairo_create (source);
 864         cairo_set_source_rgb(cr, 0, 0, 0);
 865         cairo_rectangle (cr, 0, 0, w, h);
 866         cairo_fill (cr);
 867         cairo_set_source_rgb(cr, 1, 1, 1);
 868         pango_cairo_show_layout (cr, layout);
 869         cairo_destroy (cr);
 870
 871         buffer = gdk_pixbuf_new_from_data (cairo_image_surface_get_data (source),
 872                                            GDK_COLORSPACE_RGB,
 873                                            cairo_image_surface_get_format (source) == CAIRO_FORMAT_ARGB32,
 874                                            8,
 875                                            cairo_image_surface_get_width (source),
 876                                            cairo_image_surface_get_height (source),
 877                                            cairo_image_surface_get_stride (source),
 878                                            NULL,
 879                                            NULL);
 880
 881         sx = 0;
 882         sy = 0;
 883         dw = gdk_pixbuf_get_width(pixbuf);
 884         dh = gdk_pixbuf_get_height(pixbuf);
 885
 886         if (x < 0)
 887                 {
 888                 w += x;
 889                 sx = -x;
 890                 x = 0;
 891                 }
 892
 893         if (y < 0)
 894                 {
 895                 h += y;
 896                 sy = -y;
 897                 y = 0;
 898                 }
 899
 900         if (x + w > dw) w = dw - x;
 901         if (y + h > dh) h = dh - y;
 902
 903         pixbuf_copy_font(buffer, sx, sy,
 904                          pixbuf, x, y, w, h,
 905                          r, g, b, a);
 906
 907         g_object_unref(buffer);
 908         cairo_surface_destroy(source);
 909 }
 910
 911 /*
 912  *-----------------------------------------------------------------------------
 913  * pixbuf drawing (triangle)
 914  *-----------------------------------------------------------------------------
 915  */
 916
 917 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 918                         gint *rx, gint *ry, gint *rw, gint *rh)
 919 {
 920         gint tx, ty, tw, th;
 921
 922         tx = MIN(x1, x2);
 923         tx = MIN(tx, x3);
 924         ty = MIN(y1, y2);
 925         ty = MIN(ty, y3);
 926         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 927         tw = MAX(tw, abs(x3 - x1));
 928         th = MAX(abs(y1 - y2), abs(y2 - y3));
 929         th = MAX(th, abs(y3 - y1));
 930
 931         *rx = tx;
 932         *ry = ty;
 933         *rw = tw;
 934         *rh = th;
 935 }
 936
 937 void pixbuf_draw_triangle(GdkPixbuf *pb,
 938                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 939                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 940                           guint8 r, guint8 g, guint8 b, guint8 a)
 941 {
 942         gboolean has_alpha;
 943         gint pw, ph, prs;
 944         gint rx, ry, rw, rh;
 945         gint tx, ty, tw, th;
 946         gint fx1, fy1;
 947         gint fx2, fy2;
 948         gint fw, fh;
 949         guchar *p_pix;
 950         guchar *pp;
 951         gint p_step;
 952         gdouble slope1, slope2;
 953         gint slope1_x, slope1_y;
 954         gint y;
 955         gint t;
 956         gboolean middle = FALSE;
 957
 958         if (!pb) return;
 959
 960         pw = gdk_pixbuf_get_width(pb);
 961         ph = gdk_pixbuf_get_height(pb);
 962
 963         if (!util_clip_region(0, 0, pw, ph,
 964                               clip_x, clip_y, clip_w, clip_h,
 965                               &rx, &ry, &rw, &rh)) return;
 966
 967         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 968                            &tx, &ty, &tw, &th);
 969
 970         if (!util_clip_region(rx, ry, rw, rh,
 971                               tx, ty, tw, th,
 972                               &fx1, &fy1, &fw, &fh)) return;
 973         fx2 = fx1 + fw;
 974         fy2 = fy1 + fh;
 975
 976         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 977         prs = gdk_pixbuf_get_rowstride(pb);
 978         p_pix = gdk_pixbuf_get_pixels(pb);
 979
 980         p_step = (has_alpha) ? 4 : 3;
 981
 982         if (y1 > y2)
 983                 {
 984                 t = x1; x1 = x2; x2 = t;
 985                 t = y1; y1 = y2; y2 = t;
 986                 }
 987         if (y2 > y3)
 988                 {
 989                 t = x2; x2 = x3; x3 = t;
 990                 t = y2; y2 = y3; y3 = t;
 991                 }
 992         if (y1 > y2)
 993                 {
 994                 t = x1; x1 = x2; x2 = t;
 995                 t = y1; y1 = y2; y2 = t;
 996                 }
 997
 998         slope1 = (gdouble)(y2 - y1);
 999         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
1000         slope1_x = x1;
1001         slope1_y = y1;
1002         slope2 = (gdouble)(y3 - y1);
1003         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
1004
1005         for (y = fy1; y < fy2; y++)
1006                 {
1007                 gint xa, xb;
1008
1009                 if (!middle && y > y2)
1010                         {
1011                         slope1 = (gdouble)(y3 - y2);
1012                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
1013                         slope1_x = x2;
1014                         slope1_y = y2;
1015
1016                         middle = TRUE;
1017                         }
1018
1019                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
1020                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
1021
1022                 if (xa > xb)
1023                         {
1024                         t = xa; xa = xb; xb = t;
1025                         }
1026
1027                 xa = CLAMP(xa, fx1, fx2);
1028                 xb = CLAMP(xb, fx1, fx2);
1029
1030                 pp = p_pix + y * prs + xa * p_step;
1031
1032                 while (xa < xb)
1033                         {
1034                         *pp = (r * a + *pp * (256-a)) >> 8;
1035                         pp++;
1036                         *pp = (g * a + *pp * (256-a)) >> 8;
1037                         pp++;
1038                         *pp = (b * a + *pp * (256-a)) >> 8;
1039                         pp++;
1040                         if (has_alpha) pp++;
1041
1042                         xa++;
1043                         }
1044                 }
1045 }
1046
1047 /*
1048  *-----------------------------------------------------------------------------
1049  * pixbuf drawing (line)
1050  *-----------------------------------------------------------------------------
1051  */
1052
1053 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
1054                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
1055                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
1056 {
1057         gboolean flip = FALSE;
1058         gdouble d;
1059
1060         if (x1 > x2)
1061                 {
1062                 gdouble t;
1063
1064                 t = x1; x1 = x2; x2 = t;
1065                 t = y1; y1 = y2; y2 = t;
1066                 flip = TRUE;
1067                 }
1068
1069         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
1070
1071         if (y1 < y2)
1072                 {
1073                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1074                 }
1075         else
1076                 {
1077                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1078                 }
1079
1080         d = x2 - x1;
1081         if (d > 0.0)
1082                 {
1083                 gdouble slope;
1084
1085                 slope = (y2 - y1) / d;
1086                 if (x1 < clip_x)
1087                         {
1088                         y1 = y1 + slope * (clip_x - x1);
1089                         x1 = clip_x;
1090                         }
1091                 if (x2 > clip_x + clip_w)
1092                         {
1093                         y2 = y2 + slope * (clip_x + clip_w - x2);
1094                         x2 = clip_x + clip_w;
1095                         }
1096                 }
1097
1098         if (y1 < y2)
1099                 {
1100                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1101                 }
1102         else
1103                 {
1104                 gdouble t;
1105
1106                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1107
1108                 t = x1; x1 = x2; x2 = t;
1109                 t = y1; y1 = y2; y2 = t;
1110                 flip = !flip;
1111                 }
1112
1113         d = y2 - y1;
1114         if (d > 0.0)
1115                 {
1116                 gdouble slope;
1117
1118                 slope = (x2 - x1) / d;
1119                 if (y1 < clip_y)
1120                         {
1121                         x1 = x1 + slope * (clip_y - y1);
1122                         y1 = clip_y;
1123                         }
1124                 if (y2 > clip_y + clip_h)
1125                         {
1126                         x2 = x2 + slope * (clip_y + clip_h - y2);
1127                         y2 = clip_y + clip_h;
1128                         }
1129                 }
1130
1131         if (flip)
1132                 {
1133                 *rx1 = x2;
1134                 *ry1 = y2;
1135                 *rx2 = x1;
1136                 *ry2 = y1;
1137                 }
1138         else
1139                 {
1140                 *rx1 = x1;
1141                 *ry1 = y1;
1142                 *rx2 = x2;
1143                 *ry2 = y2;
1144                 }
1145
1146         return TRUE;
1147 }
1148
1149 void pixbuf_draw_line(GdkPixbuf *pb,
1150                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1151                       gint x1, gint y1, gint x2, gint y2,
1152                       guint8 r, guint8 g, guint8 b, guint8 a)
1153 {
1154         gboolean has_alpha;
1155         gint pw, ph, prs;
1156         gint rx, ry, rw, rh;
1157         gdouble rx1, ry1, rx2, ry2;
1158         guchar *p_pix;
1159         guchar *pp;
1160         gint p_step;
1161         gdouble slope;
1162         gdouble x, y;
1163         gint px, py;
1164         gint cx1, cy1, cx2, cy2;
1165
1166         if (!pb) return;
1167
1168         pw = gdk_pixbuf_get_width(pb);
1169         ph = gdk_pixbuf_get_height(pb);
1170
1171         if (!util_clip_region(0, 0, pw, ph,
1172                               clip_x, clip_y, clip_w, clip_h,
1173                               &rx, &ry, &rw, &rh)) return;
1174         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
1175                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
1176                             &rx1, &ry1, &rx2, &ry2)) return;
1177
1178         cx1 = rx;
1179         cy1 = ry;
1180         cx2 = rx + rw;
1181         cy2 = ry + rh;
1182
1183         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1184         prs = gdk_pixbuf_get_rowstride(pb);
1185         p_pix = gdk_pixbuf_get_pixels(pb);
1186
1187         p_step = (has_alpha) ? 4 : 3;
1188
1189         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1190                 {
1191                 if (rx1 > rx2)
1192                         {
1193                         gdouble t;
1194                         t = rx1; rx1 = rx2; rx2 = t;
1195                         t = ry1; ry1 = ry2; ry2 = t;
1196                         }
1197
1198                 slope = rx2 - rx1;
1199                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1200                 for (x = rx1; x < rx2; x += 1.0)
1201                         {
1202                         px = (gint)(x + 0.5);
1203                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1204
1205                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1206                                 {
1207                                 pp = p_pix + py * prs + px * p_step;
1208                                 *pp = (r * a + *pp * (256-a)) >> 8;
1209                                 pp++;
1210                                 *pp = (g * a + *pp * (256-a)) >> 8;
1211                                 pp++;
1212                                 *pp = (b * a + *pp * (256-a)) >> 8;
1213                                 }
1214                         }
1215                 }
1216         else
1217                 {
1218                 if (ry1 > ry2)
1219                         {
1220                         gdouble t;
1221                         t = rx1; rx1 = rx2; rx2 = t;
1222                         t = ry1; ry1 = ry2; ry2 = t;
1223                         }
1224
1225                 slope = ry2 - ry1;
1226                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1227                 for (y = ry1; y < ry2; y += 1.0)
1228                         {
1229                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1230                         py = (gint)(y + 0.5);
1231
1232                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1233                                 {
1234                                 pp = p_pix + py * prs + px * p_step;
1235                                 *pp = (r * a + *pp * (256-a)) >> 8;
1236                                 pp++;
1237                                 *pp = (g * a + *pp * (256-a)) >> 8;
1238                                 pp++;
1239                                 *pp = (b * a + *pp * (256-a)) >> 8;
1240                                 }
1241                         }
1242                 }
1243 }
1244
1245 /*
1246  *-----------------------------------------------------------------------------
1247  * pixbuf drawing (fades and shadows)
1248  *-----------------------------------------------------------------------------
1249  */
1250
1251 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1252                                     gint s, gboolean vertical, gint border,
1253                                     gint x1, gint y1, gint x2, gint y2,
1254                                     guint8 r, guint8 g, guint8 b, guint8 a)
1255 {
1256         guchar *pp;
1257         gint p_step;
1258         guint8 n = a;
1259         gint i, j;
1260
1261         p_step = (has_alpha) ? 4 : 3;
1262         for (j = y1; j < y2; j++)
1263                 {
1264                 pp = p_pix + j * prs + x1 * p_step;
1265                 if (!vertical) n = a - a * abs(j - s) / border;
1266                 for (i = x1; i < x2; i++)
1267                         {
1268                         if (vertical) n = a - a * abs(i - s) / border;
1269                         *pp = (r * n + *pp * (256-n)) >> 8;
1270                         pp++;
1271                         *pp = (g * n + *pp * (256-n)) >> 8;
1272                         pp++;
1273                         *pp = (b * n + *pp * (256-n)) >> 8;
1274                         pp++;
1275                         if (has_alpha) pp++;
1276                         }
1277                 }
1278 }
1279
1280 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1281                                     gint sx, gint sy, gint border,
1282                                     gint x1, gint y1, gint x2, gint y2,
1283                                     guint8 r, guint8 g, guint8 b, guint8 a)
1284 {
1285         guchar *pp;
1286         gint p_step;
1287         gint i, j;
1288
1289         p_step = (has_alpha) ? 4 : 3;
1290         for (j = y1; j < y2; j++)
1291                 {
1292                 pp = p_pix + j * prs + x1 * p_step;
1293                 for (i = x1; i < x2; i++)
1294                         {
1295                         guint8 n;
1296                         gint r;
1297
1298                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1299                         n = a - a * r / border;
1300                         *pp = (r * n + *pp * (256-n)) >> 8;
1301                         pp++;
1302                         *pp = (g * n + *pp * (256-n)) >> 8;
1303                         pp++;
1304                         *pp = (b * n + *pp * (256-n)) >> 8;
1305                         pp++;
1306                         if (has_alpha) pp++;
1307                         }
1308                 }
1309 }
1310
1311 void pixbuf_draw_shadow(GdkPixbuf *pb,
1312                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1313                         gint x, gint y, gint w, gint h, gint border,
1314                         guint8 r, guint8 g, guint8 b, guint8 a)
1315 {
1316         gint has_alpha;
1317         gint pw, ph, prs;
1318         gint rx, ry, rw, rh;
1319         gint fx, fy, fw, fh;
1320         guchar *p_pix;
1321
1322         if (!pb) return;
1323
1324         pw = gdk_pixbuf_get_width(pb);
1325         ph = gdk_pixbuf_get_height(pb);
1326
1327         if (!util_clip_region(0, 0, pw, ph,
1328                               clip_x, clip_y, clip_w, clip_h,
1329                               &rx, &ry, &rw, &rh)) return;
1330
1331         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1332         prs = gdk_pixbuf_get_rowstride(pb);
1333         p_pix = gdk_pixbuf_get_pixels(pb);
1334
1335         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1336                              rx, ry, rw, rh,
1337                              &fx, &fy, &fw, &fh))
1338                 {
1339                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1340                 }
1341
1342         if (border < 1) return;
1343
1344         if (util_clip_region(x, y + border, border, h - border * 2,
1345                              rx, ry, rw, rh,
1346                              &fx, &fy, &fw, &fh))
1347                 {
1348                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1349                                         x + border, TRUE, border,
1350                                         fx, fy, fx + fw, fy + fh,
1351                                         r, g, b, a);
1352                 }
1353         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1354                              rx, ry, rw, rh,
1355                              &fx, &fy, &fw, &fh))
1356                 {
1357                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1358                                         x + w - border, TRUE, border,
1359                                         fx, fy, fx + fw, fy + fh,
1360                                         r, g, b, a);
1361                 }
1362         if (util_clip_region(x + border, y, w - border * 2, border,
1363                              rx, ry, rw, rh,
1364                              &fx, &fy, &fw, &fh))
1365                 {
1366                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1367                                         y + border, FALSE, border,
1368                                         fx, fy, fx + fw, fy + fh,
1369                                         r, g, b, a);
1370                 }
1371         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1372                              rx, ry, rw, rh,
1373                              &fx, &fy, &fw, &fh))
1374                 {
1375                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1376                                         y + h - border, FALSE, border,
1377                                         fx, fy, fx + fw, fy + fh,
1378                                         r, g, b, a);
1379                 }
1380         if (util_clip_region(x, y, border, border,
1381                              rx, ry, rw, rh,
1382                              &fx, &fy, &fw, &fh))
1383                 {
1384                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1385                                         x + border, y + border, border,
1386                                         fx, fy, fx + fw, fy + fh,
1387                                         r, g, b, a);
1388                 }
1389         if (util_clip_region(x + w - border, y, border, border,
1390                              rx, ry, rw, rh,
1391                              &fx, &fy, &fw, &fh))
1392                 {
1393                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1394                                         x + w - border, y + border, border,
1395                                         fx, fy, fx + fw, fy + fh,
1396                                         r, g, b, a);
1397                 }
1398         if (util_clip_region(x, y + h - border, border, border,
1399                              rx, ry, rw, rh,
1400                              &fx, &fy, &fw, &fh))
1401                 {
1402                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1403                                         x + border, y + h - border, border,
1404                                         fx, fy, fx + fw, fy + fh,
1405                                         r, g, b, a);
1406                 }
1407         if (util_clip_region(x + w - border, y + h - border, border, border,
1408                              rx, ry, rw, rh,
1409                              &fx, &fy, &fw, &fh))
1410                 {
1411                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1412                                         x + w - border, y + h - border, border,
1413                                         fx, fy, fx + fw, fy + fh,
1414                                         r, g, b, a);
1415                 }
1416 }
1417
1418
1419 /*
1420  *-----------------------------------------------------------------------------
1421  * pixbuf color alterations
1422  *-----------------------------------------------------------------------------
1423  */
1424
1425 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1426                             gint x, gint y, gint w, gint h)
1427 {
1428         gboolean has_alpha;
1429         gint pw, ph, prs;
1430         guchar *p_pix;
1431         guchar *pp;
1432         gint i, j;
1433
1434         if (!pb) return;
1435
1436         pw = gdk_pixbuf_get_width(pb);
1437         ph = gdk_pixbuf_get_height(pb);
1438
1439         if (x < 0 || x + w > pw) return;
1440         if (y < 0 || y + h > ph) return;
1441
1442         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1443         prs = gdk_pixbuf_get_rowstride(pb);
1444         p_pix = gdk_pixbuf_get_pixels(pb);
1445
1446         for (i = 0; i < h; i++)
1447                 {
1448                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1449                 for (j = 0; j < w; j++)
1450                         {
1451                         guint8 grey;
1452
1453                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1454                         *pp = grey;
1455                         pp++;
1456                         *pp = grey;
1457                         pp++;
1458                         *pp = grey;
1459                         pp++;
1460                         if (has_alpha) pp++;
1461                         }
1462                 }
1463 }
1464
1465 /*
1466  *-----------------------------------------------------------------------------
1467  * pixbuf highlight under/over exposure *-----------------------------------------------------------------------------
1468  */
1469 void pixbuf_highlight_overunderexposed(GdkPixbuf *pb, gint x, gint y, gint w, gint h)
1470 {
1471         gboolean has_alpha;
1472         gint pw, ph, prs;
1473         guchar *p_pix;
1474         guchar *pp;
1475         gint i, j;
1476
1477         if (!pb) return;
1478
1479         pw = gdk_pixbuf_get_width(pb);
1480         ph = gdk_pixbuf_get_height(pb);
1481
1482         if (x < 0 || x + w > pw) return;
1483         if (y < 0 || y + h > ph) return;
1484
1485         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1486         prs = gdk_pixbuf_get_rowstride(pb);
1487         p_pix = gdk_pixbuf_get_pixels(pb);
1488
1489         for (i = 0; i < h; i++)
1490                 {
1491                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1492                 for (j = 0; j < w; j++)
1493                         {
1494                         if (pp[0] == 255 || pp[1] == 255 || pp[2] == 255 || pp[0] == 0 || pp[1] == 0 || pp[2] == 0)
1495                                 {
1496                                 *pp = 255;
1497                                 pp++;
1498                                 *pp = 0;
1499                                 pp++;
1500                                 *pp = 0;
1501                                 pp++;
1502                                 if (has_alpha) pp++;
1503                                 }
1504                         else
1505                                 {
1506                                 pp = pp + 3;
1507                                 if (has_alpha) pp++;
1508                                 }
1509                         }
1510                 }
1511 }
1512
1513 /*
1514  *-----------------------------------------------------------------------------
1515  * pixbuf ignore alpha
1516  *-----------------------------------------------------------------------------
1517 */
1518 void pixbuf_ignore_alpha_rect(GdkPixbuf *pb,
1519                  gint x, gint y, gint w, gint h)
1520 {
1521    gboolean has_alpha;
1522    gint pw, ph, prs;
1523    guchar *p_pix;
1524    guchar *pp;
1525    gint i, j;
1526
1527    if (!pb) return;
1528
1529    pw = gdk_pixbuf_get_width(pb);
1530    ph = gdk_pixbuf_get_height(pb);
1531
1532    if (x < 0 || x + w > pw) return;
1533    if (y < 0 || y + h > ph) return;
1534
1535    has_alpha = gdk_pixbuf_get_has_alpha(pb);
1536    if (!has_alpha) return;
1537
1538    prs = gdk_pixbuf_get_rowstride(pb);
1539    p_pix = gdk_pixbuf_get_pixels(pb);
1540
1541    for (i = 0; i < h; i++)
1542        {
1543        pp = p_pix + (y + i) * prs + (x * 4 );
1544        for (j = 0; j < w; j++)
1545            {
1546            pp[3] = 0xff;
1547            pp+=4;
1548            }
1549        }
1550 }
1551 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */