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_ARCHIVE,        icon_archive },
 118         { PIXBUF_INLINE_ICON_FLOAT,     icon_float },
 119         { PIXBUF_INLINE_ICON_THUMB,     icon_thumb },
 120         { PIXBUF_INLINE_ICON_BOOK,      icon_book },
 121         { PIXBUF_INLINE_ICON_CONFIG,    icon_config },
 122         { PIXBUF_INLINE_ICON_TOOLS,     icon_tools },
 123         { PIXBUF_INLINE_ICON_VIEW,      icon_view },
 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                 case FORMAT_CLASS_ARCHIVE:
 304                         pixbuf = pixbuf_inline(PIXBUF_INLINE_ARCHIVE);
 305                         break;
 306                 default:
 307                         pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 308                 }
 309
 310         if (requested_width && requested_height)
 311                 {
 312                 gint w = gdk_pixbuf_get_width(pixbuf);
 313                 gint h = gdk_pixbuf_get_height(pixbuf);
 314
 315                 if (w > requested_width || h > requested_height)
 316                         {
 317                         gint nw, nh;
 318
 319                         if (pixbuf_scale_aspect(requested_width, requested_height,
 320                                                           w, h, &nw, &nh))
 321                                 {
 322                                 GdkPixbuf *tmp;
 323
 324                                 tmp = pixbuf;
 325                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 326                                 g_object_unref(G_OBJECT(tmp));
 327                                 }
 328                         }
 329                 }
 330         return pixbuf;
 331 }
 332
 333
 334 /*
 335  *-----------------------------------------------------------------------------
 336  * misc utils
 337  *-----------------------------------------------------------------------------
 338  */
 339
 340 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 341                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 342                           gint *rx, gint *ry, gint *rw, gint *rh)
 343 {
 344         if (clip_x + clip_w <= x ||
 345             clip_x >= x + w ||
 346             clip_y + clip_h <= y ||
 347             clip_y >= y + h)
 348                 {
 349                 return FALSE;
 350                 }
 351
 352         *rx = MAX(x, clip_x);
 353         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 354
 355         *ry = MAX(y, clip_y);
 356         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 357
 358         return TRUE;
 359 }
 360
 361 /*
 362  *-----------------------------------------------------------------------------
 363  * pixbuf rotation
 364  *-----------------------------------------------------------------------------
 365  */
 366
 367 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 368                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 369                                      gint bytes_per_pixel, gboolean counter_clockwise)
 370 {
 371         gint i, j;
 372         guchar *sp;
 373         guchar *dp;
 374
 375         for (i = 0; i < h; i++)
 376                 {
 377                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 378                 for (j = 0; j < w; j++)
 379                         {
 380                         if (counter_clockwise)
 381                                 {
 382                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 383                                 }
 384                         else
 385                                 {
 386                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 387                                 }
 388                         *(dp++) = *(sp++);      /* r */
 389                         *(dp++) = *(sp++);      /* g */
 390                         *(dp++) = *(sp++);      /* b */
 391                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 392                         }
 393                 }
 394
 395 }
 396
 397 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 398                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 399 {
 400         gint i;
 401         guchar *sp;
 402         guchar *dp;
 403
 404         for (i = 0; i < h; i++)
 405                 {
 406                 sp = src + (i * src_row_stride);
 407                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 408                 memcpy(dp, sp, w * bytes_per_pixel);
 409                 }
 410 }
 411
 412 #define ROTATE_BUFFER_WIDTH 48
 413 #define ROTATE_BUFFER_HEIGHT 48
 414
 415 /*
 416  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 417  *
 418  */
 419 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 420 {
 421         GdkPixbuf *dest;
 422         gboolean has_alpha;
 423         gint sw, sh, srs;
 424         gint dw, dh, drs;
 425         guchar *s_pix;
 426         guchar *d_pix;
 427         gint i, j;
 428         gint a;
 429         GdkPixbuf *buffer;
 430         guchar *b_pix;
 431         gint brs;
 432         gint w, h;
 433
 434         if (!src) return NULL;
 435
 436         sw = gdk_pixbuf_get_width(src);
 437         sh = gdk_pixbuf_get_height(src);
 438         has_alpha = gdk_pixbuf_get_has_alpha(src);
 439         srs = gdk_pixbuf_get_rowstride(src);
 440         s_pix = gdk_pixbuf_get_pixels(src);
 441
 442         dw = sh;
 443         dh = sw;
 444         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 445         drs = gdk_pixbuf_get_rowstride(dest);
 446         d_pix = gdk_pixbuf_get_pixels(dest);
 447
 448         a = (has_alpha ? 4 : 3);
 449
 450         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 451                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 452         b_pix = gdk_pixbuf_get_pixels(buffer);
 453         brs = gdk_pixbuf_get_rowstride(buffer);
 454
 455         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 456                 {
 457                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 458                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 459                         {
 460                         gint x, y;
 461
 462                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 463                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 464                                                  b_pix, brs, h, w,
 465                                                  a, counter_clockwise);
 466
 467                         if (counter_clockwise)
 468                                 {
 469                                 x = i;
 470                                 y = sw - h - j;
 471                                 }
 472                         else
 473                                 {
 474                                 x = sh - w - i;
 475                                 y = j;
 476                                 }
 477                         pixbuf_copy_block(b_pix, brs, w, h,
 478                                           d_pix, drs, x, y, a);
 479                         }
 480                 }
 481
 482         g_object_unref(buffer);
 483
 484 #if 0
 485         /* this is the simple version of rotation (roughly 2-4x slower) */
 486
 487         for (i = 0; i < sh; i++)
 488                 {
 489                 sp = s_pix + (i * srs);
 490                 for (j = 0; j < sw; j++)
 491                         {
 492                         if (counter_clockwise)
 493                                 {
 494                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 495                                 }
 496                         else
 497                                 {
 498                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 499                                 }
 500
 501                         *(dp++) = *(sp++);      /* r */
 502                         *(dp++) = *(sp++);      /* g */
 503                         *(dp++) = *(sp++);      /* b */
 504                         if (has_alpha) *(dp) = *(sp++); /* a */
 505                         }
 506                 }
 507 #endif
 508
 509         return dest;
 510 }
 511
 512 /*
 513  * Returns a copy of pixbuf mirrored and or flipped.
 514  * TO do a 180 degree rotations set both mirror and flipped TRUE
 515  * if mirror and flip are FALSE, result is a simple copy.
 516  */
 517 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 518 {
 519         GdkPixbuf *dest;
 520         gboolean has_alpha;
 521         gint w, h, srs;
 522         gint drs;
 523         guchar *s_pix;
 524         guchar *d_pix;
 525         guchar *sp;
 526         guchar *dp;
 527         gint i, j;
 528         gint a;
 529
 530         if (!src) return NULL;
 531
 532         w = gdk_pixbuf_get_width(src);
 533         h = gdk_pixbuf_get_height(src);
 534         has_alpha = gdk_pixbuf_get_has_alpha(src);
 535         srs = gdk_pixbuf_get_rowstride(src);
 536         s_pix = gdk_pixbuf_get_pixels(src);
 537
 538         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 539         drs = gdk_pixbuf_get_rowstride(dest);
 540         d_pix = gdk_pixbuf_get_pixels(dest);
 541
 542         a = has_alpha ? 4 : 3;
 543
 544         for (i = 0; i < h; i++)
 545                 {
 546                 sp = s_pix + (i * srs);
 547                 if (flip)
 548                         {
 549                         dp = d_pix + ((h - i - 1) * drs);
 550                         }
 551                 else
 552                         {
 553                         dp = d_pix + (i * drs);
 554                         }
 555                 if (mirror)
 556                         {
 557                         dp += (w - 1) * a;
 558                         for (j = 0; j < w; j++)
 559                                 {
 560                                 *(dp++) = *(sp++);      /* r */
 561                                 *(dp++) = *(sp++);      /* g */
 562                                 *(dp++) = *(sp++);      /* b */
 563                                 if (has_alpha) *(dp) = *(sp++); /* a */
 564                                 dp -= (a + 3);
 565                                 }
 566                         }
 567                 else
 568                         {
 569                         for (j = 0; j < w; j++)
 570                                 {
 571                                 *(dp++) = *(sp++);      /* r */
 572                                 *(dp++) = *(sp++);      /* g */
 573                                 *(dp++) = *(sp++);      /* b */
 574                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 575                                 }
 576                         }
 577                 }
 578
 579         return dest;
 580 }
 581
 582 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 583 {
 584         GdkPixbuf *dest;
 585         GdkPixbuf *tmp = NULL;
 586
 587         switch (orientation)
 588                 {
 589                 case EXIF_ORIENTATION_TOP_LEFT:
 590                         dest = gdk_pixbuf_copy(pixbuf);
 591                         break;
 592                 case EXIF_ORIENTATION_TOP_RIGHT:
 593                         /* mirrored */
 594                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 595                         break;
 596                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 597                         /* upside down */
 598                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 599                         break;
 600                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 601                         /* flipped */
 602                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 603                         break;
 604                 case EXIF_ORIENTATION_LEFT_TOP:
 605                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 606                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 607                         break;
 608                 case EXIF_ORIENTATION_RIGHT_TOP:
 609                         /* rotated -90 (270) */
 610                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 611                         break;
 612                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 613                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 614                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 615                         break;
 616                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 617                         /* rotated 90 */
 618                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 619                         break;
 620                 default:
 621                         dest = gdk_pixbuf_copy(pixbuf);
 622                         break;
 623                 }
 624         if (tmp) g_object_unref(tmp);
 625         return dest;
 626
 627 }
 628
 629
 630 /*
 631  *-----------------------------------------------------------------------------
 632  * pixbuf drawing (rectangles)
 633  *-----------------------------------------------------------------------------
 634  */
 635
 636 /*
 637  * Fills region of pixbuf at x,y over w,h
 638  * with colors red (r), green (g), blue (b)
 639  * applying alpha (a), use a=255 for solid.
 640  */
 641 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 642                            gint x, gint y, gint w, gint h,
 643                            gint r, gint g, gint b, gint a)
 644 {
 645         gboolean has_alpha;
 646         gint pw, ph, prs;
 647         guchar *p_pix;
 648         guchar *pp;
 649         gint i, j;
 650
 651         if (!pb) return;
 652
 653         pw = gdk_pixbuf_get_width(pb);
 654         ph = gdk_pixbuf_get_height(pb);
 655
 656         if (x < 0 || x + w > pw) return;
 657         if (y < 0 || y + h > ph) return;
 658
 659         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 660         prs = gdk_pixbuf_get_rowstride(pb);
 661         p_pix = gdk_pixbuf_get_pixels(pb);
 662
 663         for (i = 0; i < h; i++)
 664                 {
 665                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 666                 for (j = 0; j < w; j++)
 667                         {
 668                         *pp = (r * a + *pp * (256-a)) >> 8;
 669                         pp++;
 670                         *pp = (g * a + *pp * (256-a)) >> 8;
 671                         pp++;
 672                         *pp = (b * a + *pp * (256-a)) >> 8;
 673                         pp++;
 674                         if (has_alpha) pp++;
 675                         }
 676                 }
 677 }
 678
 679 void pixbuf_draw_rect(GdkPixbuf *pb,
 680                       gint x, gint y, gint w, gint h,
 681                       gint r, gint g, gint b, gint a,
 682                       gint left, gint right, gint top, gint bottom)
 683 {
 684         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 685                               r, g, b ,a);
 686         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 687                               r, g, b ,a);
 688         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 689                               r, g, b ,a);
 690         pixbuf_draw_rect_fill(pb, x, y, left, h,
 691                               r, g, b ,a);
 692 }
 693
 694 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 695                           gint x, gint y, gint w, gint h,
 696                           gint r, gint g, gint b, gint a)
 697 {
 698         gboolean has_alpha;
 699         gint pw, ph, prs;
 700         guchar *p_pix;
 701         guchar *pp;
 702         gint i, j;
 703
 704         if (!pb) return;
 705
 706         pw = gdk_pixbuf_get_width(pb);
 707         ph = gdk_pixbuf_get_height(pb);
 708
 709         if (x < 0 || x + w > pw) return;
 710         if (y < 0 || y + h > ph) return;
 711
 712         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 713         prs = gdk_pixbuf_get_rowstride(pb);
 714         p_pix = gdk_pixbuf_get_pixels(pb);
 715
 716         for (i = 0; i < h; i++)
 717                 {
 718                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 719                 for (j = 0; j < w; j++)
 720                         {
 721                         *pp = r; pp++;
 722                         *pp = g; pp++;
 723                         *pp = b; pp++;
 724                         if (has_alpha) { *pp = a; pp++; }
 725                         }
 726                 }
 727 }
 728
 729 void pixbuf_set_rect(GdkPixbuf *pb,
 730                      gint x, gint y, gint w, gint h,
 731                      gint r, gint g, gint b, gint a,
 732                      gint left, gint right, gint top, gint bottom)
 733 {
 734         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 735                              r, g, b ,a);
 736         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 737                              r, g, b ,a);
 738         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 739                              r, g, b ,a);
 740         pixbuf_set_rect_fill(pb, x, y, left, h,
 741                              r, g, b ,a);
 742 }
 743
 744 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 745 {
 746         guchar *buf;
 747         gboolean has_alpha;
 748         gint rowstride;
 749         guchar *p;
 750
 751         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 752             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 753
 754         buf = gdk_pixbuf_get_pixels(pb);
 755         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 756         rowstride = gdk_pixbuf_get_rowstride(pb);
 757
 758         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 759         *p = r; p++;
 760         *p = g; p++;
 761         *p = b; p++;
 762         if (has_alpha) *p = a;
 763 }
 764
 765
 766 /*
 767  *-----------------------------------------------------------------------------
 768  * pixbuf text rendering
 769  *-----------------------------------------------------------------------------
 770  */
 771
 772 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 773                              GdkPixbuf *dest, gint dx, gint dy,
 774                              gint w, gint h,
 775                              guint8 r, guint8 g, guint8 b, guint8 a)
 776 {
 777         gint sw, sh, srs;
 778         gboolean s_alpha;
 779         gint s_step;
 780         guchar *s_pix;
 781         gint dw, dh, drs;
 782         gboolean d_alpha;
 783         gint d_step;
 784         guchar *d_pix;
 785
 786         guchar *sp;
 787         guchar *dp;
 788         gint i, j;
 789
 790         if (!src || !dest) return;
 791
 792         sw = gdk_pixbuf_get_width(src);
 793         sh = gdk_pixbuf_get_height(src);
 794
 795         if (sx < 0 || sx + w > sw) return;
 796         if (sy < 0 || sy + h > sh) return;
 797
 798         dw = gdk_pixbuf_get_width(dest);
 799         dh = gdk_pixbuf_get_height(dest);
 800
 801         if (dx < 0 || dx + w > dw) return;
 802         if (dy < 0 || dy + h > dh) return;
 803
 804         s_alpha = gdk_pixbuf_get_has_alpha(src);
 805         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 806         srs = gdk_pixbuf_get_rowstride(src);
 807         drs = gdk_pixbuf_get_rowstride(dest);
 808         s_pix = gdk_pixbuf_get_pixels(src);
 809         d_pix = gdk_pixbuf_get_pixels(dest);
 810
 811         s_step = (s_alpha) ? 4 : 3;
 812         d_step = (d_alpha) ? 4 : 3;
 813
 814         for (i = 0; i < h; i++)
 815                 {
 816                 sp = s_pix + (sy + i) * srs + sx * s_step;
 817                 dp = d_pix + (dy + i) * drs + dx * d_step;
 818                 for (j = 0; j < w; j++)
 819                         {
 820                         if (*sp)
 821                                 {
 822                                 guint8 asub;
 823
 824                                 asub = a * sp[0] / 255;
 825                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 826                                 dp++;
 827                                 asub = a * sp[1] / 255;
 828                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 829                                 dp++;
 830                                 asub = a * sp[2] / 255;
 831                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 832                                 dp++;
 833
 834                                 if (d_alpha)
 835                                         {
 836                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 837                                         dp++;
 838                                         }
 839                                 }
 840                         else
 841                                 {
 842                                 dp += d_step;
 843                                 }
 844
 845                         sp += s_step;
 846                         }
 847                 }
 848 }
 849
 850 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 851                         gint x, gint y,
 852                         guint8 r, guint8 g, guint8 b, guint8 a)
 853 {
 854         GdkPixbuf *buffer;
 855         gint w, h;
 856         gint sx, sy;
 857         gint dw, dh;
 858         cairo_surface_t *source;
 859         cairo_t *cr;
 860
 861         pango_layout_get_pixel_size(layout, &w, &h);
 862         if (w < 1 || h < 1) return;
 863
 864         source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
 865
 866         cr = cairo_create (source);
 867         cairo_set_source_rgb(cr, 0, 0, 0);
 868         cairo_rectangle (cr, 0, 0, w, h);
 869         cairo_fill (cr);
 870         cairo_set_source_rgb(cr, 1, 1, 1);
 871         pango_cairo_show_layout (cr, layout);
 872         cairo_destroy (cr);
 873
 874         buffer = gdk_pixbuf_new_from_data (cairo_image_surface_get_data (source),
 875                                            GDK_COLORSPACE_RGB,
 876                                            cairo_image_surface_get_format (source) == CAIRO_FORMAT_ARGB32,
 877                                            8,
 878                                            cairo_image_surface_get_width (source),
 879                                            cairo_image_surface_get_height (source),
 880                                            cairo_image_surface_get_stride (source),
 881                                            NULL,
 882                                            NULL);
 883
 884         sx = 0;
 885         sy = 0;
 886         dw = gdk_pixbuf_get_width(pixbuf);
 887         dh = gdk_pixbuf_get_height(pixbuf);
 888
 889         if (x < 0)
 890                 {
 891                 w += x;
 892                 sx = -x;
 893                 x = 0;
 894                 }
 895
 896         if (y < 0)
 897                 {
 898                 h += y;
 899                 sy = -y;
 900                 y = 0;
 901                 }
 902
 903         if (x + w > dw) w = dw - x;
 904         if (y + h > dh) h = dh - y;
 905
 906         pixbuf_copy_font(buffer, sx, sy,
 907                          pixbuf, x, y, w, h,
 908                          r, g, b, a);
 909
 910         g_object_unref(buffer);
 911         cairo_surface_destroy(source);
 912 }
 913
 914 /*
 915  *-----------------------------------------------------------------------------
 916  * pixbuf drawing (triangle)
 917  *-----------------------------------------------------------------------------
 918  */
 919
 920 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 921                         gint *rx, gint *ry, gint *rw, gint *rh)
 922 {
 923         gint tx, ty, tw, th;
 924
 925         tx = MIN(x1, x2);
 926         tx = MIN(tx, x3);
 927         ty = MIN(y1, y2);
 928         ty = MIN(ty, y3);
 929         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 930         tw = MAX(tw, abs(x3 - x1));
 931         th = MAX(abs(y1 - y2), abs(y2 - y3));
 932         th = MAX(th, abs(y3 - y1));
 933
 934         *rx = tx;
 935         *ry = ty;
 936         *rw = tw;
 937         *rh = th;
 938 }
 939
 940 void pixbuf_draw_triangle(GdkPixbuf *pb,
 941                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 942                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 943                           guint8 r, guint8 g, guint8 b, guint8 a)
 944 {
 945         gboolean has_alpha;
 946         gint pw, ph, prs;
 947         gint rx, ry, rw, rh;
 948         gint tx, ty, tw, th;
 949         gint fx1, fy1;
 950         gint fx2, fy2;
 951         gint fw, fh;
 952         guchar *p_pix;
 953         guchar *pp;
 954         gint p_step;
 955         gdouble slope1, slope2;
 956         gint slope1_x, slope1_y;
 957         gint y;
 958         gint t;
 959         gboolean middle = FALSE;
 960
 961         if (!pb) return;
 962
 963         pw = gdk_pixbuf_get_width(pb);
 964         ph = gdk_pixbuf_get_height(pb);
 965
 966         if (!util_clip_region(0, 0, pw, ph,
 967                               clip_x, clip_y, clip_w, clip_h,
 968                               &rx, &ry, &rw, &rh)) return;
 969
 970         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 971                            &tx, &ty, &tw, &th);
 972
 973         if (!util_clip_region(rx, ry, rw, rh,
 974                               tx, ty, tw, th,
 975                               &fx1, &fy1, &fw, &fh)) return;
 976         fx2 = fx1 + fw;
 977         fy2 = fy1 + fh;
 978
 979         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 980         prs = gdk_pixbuf_get_rowstride(pb);
 981         p_pix = gdk_pixbuf_get_pixels(pb);
 982
 983         p_step = (has_alpha) ? 4 : 3;
 984
 985         if (y1 > y2)
 986                 {
 987                 t = x1; x1 = x2; x2 = t;
 988                 t = y1; y1 = y2; y2 = t;
 989                 }
 990         if (y2 > y3)
 991                 {
 992                 t = x2; x2 = x3; x3 = t;
 993                 t = y2; y2 = y3; y3 = t;
 994                 }
 995         if (y1 > y2)
 996                 {
 997                 t = x1; x1 = x2; x2 = t;
 998                 t = y1; y1 = y2; y2 = t;
 999                 }
1000
1001         slope1 = (gdouble)(y2 - y1);
1002         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
1003         slope1_x = x1;
1004         slope1_y = y1;
1005         slope2 = (gdouble)(y3 - y1);
1006         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
1007
1008         for (y = fy1; y < fy2; y++)
1009                 {
1010                 gint xa, xb;
1011
1012                 if (!middle && y > y2)
1013                         {
1014                         slope1 = (gdouble)(y3 - y2);
1015                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
1016                         slope1_x = x2;
1017                         slope1_y = y2;
1018
1019                         middle = TRUE;
1020                         }
1021
1022                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
1023                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
1024
1025                 if (xa > xb)
1026                         {
1027                         t = xa; xa = xb; xb = t;
1028                         }
1029
1030                 xa = CLAMP(xa, fx1, fx2);
1031                 xb = CLAMP(xb, fx1, fx2);
1032
1033                 pp = p_pix + y * prs + xa * p_step;
1034
1035                 while (xa < xb)
1036                         {
1037                         *pp = (r * a + *pp * (256-a)) >> 8;
1038                         pp++;
1039                         *pp = (g * a + *pp * (256-a)) >> 8;
1040                         pp++;
1041                         *pp = (b * a + *pp * (256-a)) >> 8;
1042                         pp++;
1043                         if (has_alpha) pp++;
1044
1045                         xa++;
1046                         }
1047                 }
1048 }
1049
1050 /*
1051  *-----------------------------------------------------------------------------
1052  * pixbuf drawing (line)
1053  *-----------------------------------------------------------------------------
1054  */
1055
1056 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
1057                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
1058                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
1059 {
1060         gboolean flip = FALSE;
1061         gdouble d;
1062
1063         if (x1 > x2)
1064                 {
1065                 gdouble t;
1066
1067                 t = x1; x1 = x2; x2 = t;
1068                 t = y1; y1 = y2; y2 = t;
1069                 flip = TRUE;
1070                 }
1071
1072         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
1073
1074         if (y1 < y2)
1075                 {
1076                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1077                 }
1078         else
1079                 {
1080                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1081                 }
1082
1083         d = x2 - x1;
1084         if (d > 0.0)
1085                 {
1086                 gdouble slope;
1087
1088                 slope = (y2 - y1) / d;
1089                 if (x1 < clip_x)
1090                         {
1091                         y1 = y1 + slope * (clip_x - x1);
1092                         x1 = clip_x;
1093                         }
1094                 if (x2 > clip_x + clip_w)
1095                         {
1096                         y2 = y2 + slope * (clip_x + clip_w - x2);
1097                         x2 = clip_x + clip_w;
1098                         }
1099                 }
1100
1101         if (y1 < y2)
1102                 {
1103                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1104                 }
1105         else
1106                 {
1107                 gdouble t;
1108
1109                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1110
1111                 t = x1; x1 = x2; x2 = t;
1112                 t = y1; y1 = y2; y2 = t;
1113                 flip = !flip;
1114                 }
1115
1116         d = y2 - y1;
1117         if (d > 0.0)
1118                 {
1119                 gdouble slope;
1120
1121                 slope = (x2 - x1) / d;
1122                 if (y1 < clip_y)
1123                         {
1124                         x1 = x1 + slope * (clip_y - y1);
1125                         y1 = clip_y;
1126                         }
1127                 if (y2 > clip_y + clip_h)
1128                         {
1129                         x2 = x2 + slope * (clip_y + clip_h - y2);
1130                         y2 = clip_y + clip_h;
1131                         }
1132                 }
1133
1134         if (flip)
1135                 {
1136                 *rx1 = x2;
1137                 *ry1 = y2;
1138                 *rx2 = x1;
1139                 *ry2 = y1;
1140                 }
1141         else
1142                 {
1143                 *rx1 = x1;
1144                 *ry1 = y1;
1145                 *rx2 = x2;
1146                 *ry2 = y2;
1147                 }
1148
1149         return TRUE;
1150 }
1151
1152 void pixbuf_draw_line(GdkPixbuf *pb,
1153                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1154                       gint x1, gint y1, gint x2, gint y2,
1155                       guint8 r, guint8 g, guint8 b, guint8 a)
1156 {
1157         gboolean has_alpha;
1158         gint pw, ph, prs;
1159         gint rx, ry, rw, rh;
1160         gdouble rx1, ry1, rx2, ry2;
1161         guchar *p_pix;
1162         guchar *pp;
1163         gint p_step;
1164         gdouble slope;
1165         gdouble x, y;
1166         gint px, py;
1167         gint cx1, cy1, cx2, cy2;
1168
1169         if (!pb) return;
1170
1171         pw = gdk_pixbuf_get_width(pb);
1172         ph = gdk_pixbuf_get_height(pb);
1173
1174         if (!util_clip_region(0, 0, pw, ph,
1175                               clip_x, clip_y, clip_w, clip_h,
1176                               &rx, &ry, &rw, &rh)) return;
1177         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
1178                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
1179                             &rx1, &ry1, &rx2, &ry2)) return;
1180
1181         cx1 = rx;
1182         cy1 = ry;
1183         cx2 = rx + rw;
1184         cy2 = ry + rh;
1185
1186         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1187         prs = gdk_pixbuf_get_rowstride(pb);
1188         p_pix = gdk_pixbuf_get_pixels(pb);
1189
1190         p_step = (has_alpha) ? 4 : 3;
1191
1192         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1193                 {
1194                 if (rx1 > rx2)
1195                         {
1196                         gdouble t;
1197                         t = rx1; rx1 = rx2; rx2 = t;
1198                         t = ry1; ry1 = ry2; ry2 = t;
1199                         }
1200
1201                 slope = rx2 - rx1;
1202                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1203                 for (x = rx1; x < rx2; x += 1.0)
1204                         {
1205                         px = (gint)(x + 0.5);
1206                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1207
1208                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1209                                 {
1210                                 pp = p_pix + py * prs + px * p_step;
1211                                 *pp = (r * a + *pp * (256-a)) >> 8;
1212                                 pp++;
1213                                 *pp = (g * a + *pp * (256-a)) >> 8;
1214                                 pp++;
1215                                 *pp = (b * a + *pp * (256-a)) >> 8;
1216                                 }
1217                         }
1218                 }
1219         else
1220                 {
1221                 if (ry1 > ry2)
1222                         {
1223                         gdouble t;
1224                         t = rx1; rx1 = rx2; rx2 = t;
1225                         t = ry1; ry1 = ry2; ry2 = t;
1226                         }
1227
1228                 slope = ry2 - ry1;
1229                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1230                 for (y = ry1; y < ry2; y += 1.0)
1231                         {
1232                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1233                         py = (gint)(y + 0.5);
1234
1235                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1236                                 {
1237                                 pp = p_pix + py * prs + px * p_step;
1238                                 *pp = (r * a + *pp * (256-a)) >> 8;
1239                                 pp++;
1240                                 *pp = (g * a + *pp * (256-a)) >> 8;
1241                                 pp++;
1242                                 *pp = (b * a + *pp * (256-a)) >> 8;
1243                                 }
1244                         }
1245                 }
1246 }
1247
1248 /*
1249  *-----------------------------------------------------------------------------
1250  * pixbuf drawing (fades and shadows)
1251  *-----------------------------------------------------------------------------
1252  */
1253
1254 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1255                                     gint s, gboolean vertical, gint border,
1256                                     gint x1, gint y1, gint x2, gint y2,
1257                                     guint8 r, guint8 g, guint8 b, guint8 a)
1258 {
1259         guchar *pp;
1260         gint p_step;
1261         guint8 n = a;
1262         gint i, j;
1263
1264         p_step = (has_alpha) ? 4 : 3;
1265         for (j = y1; j < y2; j++)
1266                 {
1267                 pp = p_pix + j * prs + x1 * p_step;
1268                 if (!vertical) n = a - a * abs(j - s) / border;
1269                 for (i = x1; i < x2; i++)
1270                         {
1271                         if (vertical) n = a - a * abs(i - s) / border;
1272                         *pp = (r * n + *pp * (256-n)) >> 8;
1273                         pp++;
1274                         *pp = (g * n + *pp * (256-n)) >> 8;
1275                         pp++;
1276                         *pp = (b * n + *pp * (256-n)) >> 8;
1277                         pp++;
1278                         if (has_alpha) pp++;
1279                         }
1280                 }
1281 }
1282
1283 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1284                                     gint sx, gint sy, gint border,
1285                                     gint x1, gint y1, gint x2, gint y2,
1286                                     guint8 r, guint8 g, guint8 b, guint8 a)
1287 {
1288         guchar *pp;
1289         gint p_step;
1290         gint i, j;
1291
1292         p_step = (has_alpha) ? 4 : 3;
1293         for (j = y1; j < y2; j++)
1294                 {
1295                 pp = p_pix + j * prs + x1 * p_step;
1296                 for (i = x1; i < x2; i++)
1297                         {
1298                         guint8 n;
1299                         gint r;
1300
1301                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1302                         n = a - a * r / border;
1303                         *pp = (r * n + *pp * (256-n)) >> 8;
1304                         pp++;
1305                         *pp = (g * n + *pp * (256-n)) >> 8;
1306                         pp++;
1307                         *pp = (b * n + *pp * (256-n)) >> 8;
1308                         pp++;
1309                         if (has_alpha) pp++;
1310                         }
1311                 }
1312 }
1313
1314 void pixbuf_draw_shadow(GdkPixbuf *pb,
1315                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1316                         gint x, gint y, gint w, gint h, gint border,
1317                         guint8 r, guint8 g, guint8 b, guint8 a)
1318 {
1319         gint has_alpha;
1320         gint pw, ph, prs;
1321         gint rx, ry, rw, rh;
1322         gint fx, fy, fw, fh;
1323         guchar *p_pix;
1324
1325         if (!pb) return;
1326
1327         pw = gdk_pixbuf_get_width(pb);
1328         ph = gdk_pixbuf_get_height(pb);
1329
1330         if (!util_clip_region(0, 0, pw, ph,
1331                               clip_x, clip_y, clip_w, clip_h,
1332                               &rx, &ry, &rw, &rh)) return;
1333
1334         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1335         prs = gdk_pixbuf_get_rowstride(pb);
1336         p_pix = gdk_pixbuf_get_pixels(pb);
1337
1338         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1339                              rx, ry, rw, rh,
1340                              &fx, &fy, &fw, &fh))
1341                 {
1342                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1343                 }
1344
1345         if (border < 1) return;
1346
1347         if (util_clip_region(x, y + border, border, h - border * 2,
1348                              rx, ry, rw, rh,
1349                              &fx, &fy, &fw, &fh))
1350                 {
1351                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1352                                         x + border, TRUE, border,
1353                                         fx, fy, fx + fw, fy + fh,
1354                                         r, g, b, a);
1355                 }
1356         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1357                              rx, ry, rw, rh,
1358                              &fx, &fy, &fw, &fh))
1359                 {
1360                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1361                                         x + w - border, TRUE, border,
1362                                         fx, fy, fx + fw, fy + fh,
1363                                         r, g, b, a);
1364                 }
1365         if (util_clip_region(x + border, y, w - border * 2, border,
1366                              rx, ry, rw, rh,
1367                              &fx, &fy, &fw, &fh))
1368                 {
1369                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1370                                         y + border, FALSE, border,
1371                                         fx, fy, fx + fw, fy + fh,
1372                                         r, g, b, a);
1373                 }
1374         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1375                              rx, ry, rw, rh,
1376                              &fx, &fy, &fw, &fh))
1377                 {
1378                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1379                                         y + h - border, FALSE, border,
1380                                         fx, fy, fx + fw, fy + fh,
1381                                         r, g, b, a);
1382                 }
1383         if (util_clip_region(x, y, border, border,
1384                              rx, ry, rw, rh,
1385                              &fx, &fy, &fw, &fh))
1386                 {
1387                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1388                                         x + border, y + border, border,
1389                                         fx, fy, fx + fw, fy + fh,
1390                                         r, g, b, a);
1391                 }
1392         if (util_clip_region(x + w - border, y, border, border,
1393                              rx, ry, rw, rh,
1394                              &fx, &fy, &fw, &fh))
1395                 {
1396                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1397                                         x + w - border, y + border, border,
1398                                         fx, fy, fx + fw, fy + fh,
1399                                         r, g, b, a);
1400                 }
1401         if (util_clip_region(x, y + h - border, border, border,
1402                              rx, ry, rw, rh,
1403                              &fx, &fy, &fw, &fh))
1404                 {
1405                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1406                                         x + border, y + h - border, border,
1407                                         fx, fy, fx + fw, fy + fh,
1408                                         r, g, b, a);
1409                 }
1410         if (util_clip_region(x + w - border, y + h - border, border, border,
1411                              rx, ry, rw, rh,
1412                              &fx, &fy, &fw, &fh))
1413                 {
1414                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1415                                         x + w - border, y + h - border, border,
1416                                         fx, fy, fx + fw, fy + fh,
1417                                         r, g, b, a);
1418                 }
1419 }
1420
1421
1422 /*
1423  *-----------------------------------------------------------------------------
1424  * pixbuf color alterations
1425  *-----------------------------------------------------------------------------
1426  */
1427
1428 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1429                             gint x, gint y, gint w, gint h)
1430 {
1431         gboolean has_alpha;
1432         gint pw, ph, prs;
1433         guchar *p_pix;
1434         guchar *pp;
1435         gint i, j;
1436
1437         if (!pb) return;
1438
1439         pw = gdk_pixbuf_get_width(pb);
1440         ph = gdk_pixbuf_get_height(pb);
1441
1442         if (x < 0 || x + w > pw) return;
1443         if (y < 0 || y + h > ph) return;
1444
1445         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1446         prs = gdk_pixbuf_get_rowstride(pb);
1447         p_pix = gdk_pixbuf_get_pixels(pb);
1448
1449         for (i = 0; i < h; i++)
1450                 {
1451                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1452                 for (j = 0; j < w; j++)
1453                         {
1454                         guint8 grey;
1455
1456                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1457                         *pp = grey;
1458                         pp++;
1459                         *pp = grey;
1460                         pp++;
1461                         *pp = grey;
1462                         pp++;
1463                         if (has_alpha) pp++;
1464                         }
1465                 }
1466 }
1467
1468 /*
1469  *-----------------------------------------------------------------------------
1470  * pixbuf highlight under/over exposure *-----------------------------------------------------------------------------
1471  */
1472 void pixbuf_highlight_overunderexposed(GdkPixbuf *pb, gint x, gint y, gint w, gint h)
1473 {
1474         gboolean has_alpha;
1475         gint pw, ph, prs;
1476         guchar *p_pix;
1477         guchar *pp;
1478         gint i, j;
1479
1480         if (!pb) return;
1481
1482         pw = gdk_pixbuf_get_width(pb);
1483         ph = gdk_pixbuf_get_height(pb);
1484
1485         if (x < 0 || x + w > pw) return;
1486         if (y < 0 || y + h > ph) return;
1487
1488         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1489         prs = gdk_pixbuf_get_rowstride(pb);
1490         p_pix = gdk_pixbuf_get_pixels(pb);
1491
1492         for (i = 0; i < h; i++)
1493                 {
1494                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1495                 for (j = 0; j < w; j++)
1496                         {
1497                         if (pp[0] == 255 || pp[1] == 255 || pp[2] == 255 || pp[0] == 0 || pp[1] == 0 || pp[2] == 0)
1498                                 {
1499                                 *pp = 255;
1500                                 pp++;
1501                                 *pp = 0;
1502                                 pp++;
1503                                 *pp = 0;
1504                                 pp++;
1505                                 if (has_alpha) pp++;
1506                                 }
1507                         else
1508                                 {
1509                                 pp = pp + 3;
1510                                 if (has_alpha) pp++;
1511                                 }
1512                         }
1513                 }
1514 }
1515
1516 /*
1517  *-----------------------------------------------------------------------------
1518  * pixbuf ignore alpha
1519  *-----------------------------------------------------------------------------
1520 */
1521 void pixbuf_ignore_alpha_rect(GdkPixbuf *pb,
1522                  gint x, gint y, gint w, gint h)
1523 {
1524    gboolean has_alpha;
1525    gint pw, ph, prs;
1526    guchar *p_pix;
1527    guchar *pp;
1528    gint i, j;
1529
1530    if (!pb) return;
1531
1532    pw = gdk_pixbuf_get_width(pb);
1533    ph = gdk_pixbuf_get_height(pb);
1534
1535    if (x < 0 || x + w > pw) return;
1536    if (y < 0 || y + h > ph) return;
1537
1538    has_alpha = gdk_pixbuf_get_has_alpha(pb);
1539    if (!has_alpha) return;
1540
1541    prs = gdk_pixbuf_get_rowstride(pb);
1542    p_pix = gdk_pixbuf_get_pixels(pb);
1543
1544    for (i = 0; i < h; i++)
1545        {
1546        pp = p_pix + (y + i) * prs + (x * 4 );
1547        for (j = 0; j < w; j++)
1548            {
1549            pp[3] = 0xff;
1550            pp+=4;
1551            }
1552        }
1553 }
1554 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */