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_PANORAMA,  icon_panorama },
 124         { PIXBUF_INLINE_ICON_MAINTENANCE,       icon_maintenance },
 125         { PIXBUF_INLINE_ICON_ZOOMFILLHOR,       icon_zoomfillhor },
 126         { PIXBUF_INLINE_ICON_ZOOMFILLVERT,      icon_zoomfillvert },
 127         { PIXBUF_INLINE_ICON_HIDETOOLS, icon_hidetools },
 128         { PIXBUF_INLINE_ICON_EXIF,      icon_exif },
 129         { PIXBUF_INLINE_ICON_MARKS,     icon_marks },
 130         { PIXBUF_INLINE_ICON_INFO,      icon_info },
 131         { PIXBUF_INLINE_ICON_SORT,      icon_sort },
 132         { PIXBUF_INLINE_ICON_PDF,       icon_pdf },
 133         { PIXBUF_INLINE_ICON_DRAW_RECTANGLE,    icon_draw_rectangle },
 134         { PIXBUF_INLINE_ICON_MOVE,      icon_move },
 135         { PIXBUF_INLINE_ICON_RENAME,    icon_rename },
 136         { PIXBUF_INLINE_ICON_SELECT_ALL,        icon_select_all },
 137         { PIXBUF_INLINE_ICON_SELECT_NONE,       icon_select_none },
 138         { PIXBUF_INLINE_ICON_SELECT_INVERT,     icon_select_invert },
 139         { PIXBUF_INLINE_ICON_SELECT_RECTANGLE,  icon_select_rectangle },
 140         { PIXBUF_INLINE_ICON_FILE_FILTER,       icon_file_filter },
 141         { PIXBUF_INLINE_ICON_CW,        icon_rotate_clockwise },
 142         { PIXBUF_INLINE_ICON_CCW,       icon_rotate_counter_clockwise },
 143         { PIXBUF_INLINE_ICON_180,       icon_rotate_180 },
 144         { PIXBUF_INLINE_ICON_MIRROR,    icon_mirror },
 145         { PIXBUF_INLINE_ICON_FLIP,      icon_flip },
 146         { PIXBUF_INLINE_ICON_ORIGINAL,  icon_original },
 147         { PIXBUF_INLINE_ICON_TRASH,     icon_trash },
 148         { PIXBUF_INLINE_ICON_HEIF,      icon_heic },
 149         { PIXBUF_INLINE_ICON_GRAYSCALE, icon_grayscale },
 150         { PIXBUF_INLINE_ICON_EXPOSURE,  icon_exposure },
 151         { PIXBUF_INLINE_SPLIT_PANE_SYNC, icon_split_pane_sync },
 152         { NULL, NULL }
 153 };
 154
 155 GdkPixbuf *pixbuf_inline(const gchar *key)
 156 {
 157         gint i;
 158
 159         if (!key) return NULL;
 160
 161         i = 0;
 162         while (inline_pixbuf_data[i].key)
 163                 {
 164                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 165                         {
 166                         return gdk_pixbuf_new_from_inline(-1, inline_pixbuf_data[i].data, FALSE, NULL);
 167                         }
 168                 i++;
 169                 }
 170
 171         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 172
 173         return NULL;
 174 }
 175
 176 static void register_stock_icon(const gchar *key, GdkPixbuf *pixbuf)
 177 {
 178         static GtkIconFactory *icon_factory = NULL;
 179         GtkIconSet *icon_set;
 180
 181         if (!icon_factory)
 182                 {
 183                 icon_factory = gtk_icon_factory_new();
 184                 gtk_icon_factory_add_default(icon_factory);
 185                 }
 186
 187         icon_set = gtk_icon_set_new_from_pixbuf(pixbuf);
 188         gtk_icon_factory_add(icon_factory, key, icon_set);
 189 }
 190
 191
 192 void pixbuf_inline_register_stock_icons(void)
 193 {
 194         gint i;
 195
 196         i = 0;
 197         while (inline_pixbuf_data[i].key)
 198                 {
 199                 register_stock_icon(inline_pixbuf_data[i].key, pixbuf_inline(inline_pixbuf_data[i].key));
 200                 i++;
 201                 }
 202 }
 203
 204 gboolean register_theme_icon_as_stock(const gchar *key, const gchar *icon)
 205 {
 206         GtkIconTheme *icon_theme;
 207         GdkPixbuf *pixbuf;
 208         GError *error = NULL;
 209
 210         icon_theme = gtk_icon_theme_get_default();
 211
 212         if (gtk_icon_theme_has_icon(icon_theme, key)) return FALSE;
 213
 214         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 215                            icon, /* icon name */
 216                            64, /* size */
 217                            0,  /* flags */
 218                            &error);
 219         if (!pixbuf)
 220                 {
 221                 if (error)
 222                         {
 223                         DEBUG_1("Couldn't load icon %s: %s", icon, error->message);
 224                         g_error_free(error);
 225                         error = NULL;
 226                         }
 227
 228                 if (strchr(icon, '.'))
 229                         {
 230                         /* try again without extension */
 231                         gchar *icon2 = remove_extension_from_path(icon);
 232                         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 233                                            icon2, /* icon name */
 234                                            64, /* size */
 235                                            0,  /* flags */
 236                                            &error);
 237                         if (error)
 238                                 {
 239                                 DEBUG_1("Couldn't load icon %s: %s", icon2, error->message);
 240                                 g_error_free(error);
 241                                 error = NULL;
 242
 243                                 /* try as an absolute path */
 244                                 pixbuf = gdk_pixbuf_new_from_file(icon, &error);
 245                                 if (error)
 246                                         {
 247                                         DEBUG_1("Couldn't load icon as absolute path %s: %s", icon, error->message);
 248                                         g_error_free(error);
 249                                         }
 250                                 }
 251                         g_free(icon2);
 252                         }
 253                 }
 254
 255         if (!pixbuf) return FALSE;
 256
 257         register_stock_icon(key, pixbuf);
 258         return TRUE;
 259 }
 260
 261 gboolean pixbuf_scale_aspect(gint req_w, gint req_h,
 262                              gint old_w, gint old_h,
 263                              gint *new_w, gint *new_h)
 264 {
 265         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 266                 {
 267                 *new_w = req_w;
 268                 *new_h = (gdouble)*new_w / old_w * old_h;
 269                 if (*new_h < 1) *new_h = 1;
 270                 }
 271         else
 272                 {
 273                 *new_h = req_h;
 274                 *new_w = (gdouble)*new_h / old_h * old_w;
 275                 if (*new_w < 1) *new_w = 1;
 276                 }
 277
 278         return (*new_w != old_w || *new_h != old_h);
 279 }
 280
 281 GdkPixbuf *pixbuf_fallback(FileData *fd, gint requested_width, gint requested_height)
 282 {
 283         GdkPixbuf *pixbuf;
 284
 285         switch (fd->format_class)
 286                 {
 287                 case FORMAT_CLASS_UNKNOWN:
 288                         pixbuf = pixbuf_inline(PIXBUF_INLINE_UNKNOWN);
 289                         break;
 290                 case FORMAT_CLASS_META:
 291                         pixbuf = pixbuf_inline(PIXBUF_INLINE_METADATA);
 292                         break;
 293                 case FORMAT_CLASS_VIDEO:
 294                         pixbuf = pixbuf_inline(PIXBUF_INLINE_VIDEO);
 295                         break;
 296                 case FORMAT_CLASS_COLLECTION:
 297                         pixbuf = pixbuf_inline(PIXBUF_INLINE_COLLECTION);
 298                         break;
 299                 case FORMAT_CLASS_DOCUMENT:
 300                         pixbuf = pixbuf_inline(PIXBUF_INLINE_ICON_PDF);
 301                         break;
 302                 default:
 303                         pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 304                 }
 305
 306         if (requested_width && requested_height)
 307                 {
 308                 gint w = gdk_pixbuf_get_width(pixbuf);
 309                 gint h = gdk_pixbuf_get_height(pixbuf);
 310
 311                 if (w > requested_width || h > requested_height)
 312                         {
 313                         gint nw, nh;
 314
 315                         if (pixbuf_scale_aspect(requested_width, requested_height,
 316                                                           w, h, &nw, &nh))
 317                                 {
 318                                 GdkPixbuf *tmp;
 319
 320                                 tmp = pixbuf;
 321                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 322                                 g_object_unref(G_OBJECT(tmp));
 323                                 }
 324                         }
 325                 }
 326         return pixbuf;
 327 }
 328
 329
 330 /*
 331  *-----------------------------------------------------------------------------
 332  * misc utils
 333  *-----------------------------------------------------------------------------
 334  */
 335
 336 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 337                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 338                           gint *rx, gint *ry, gint *rw, gint *rh)
 339 {
 340         if (clip_x + clip_w <= x ||
 341             clip_x >= x + w ||
 342             clip_y + clip_h <= y ||
 343             clip_y >= y + h)
 344                 {
 345                 return FALSE;
 346                 }
 347
 348         *rx = MAX(x, clip_x);
 349         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 350
 351         *ry = MAX(y, clip_y);
 352         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 353
 354         return TRUE;
 355 }
 356
 357 /*
 358  *-----------------------------------------------------------------------------
 359  * pixbuf rotation
 360  *-----------------------------------------------------------------------------
 361  */
 362
 363 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 364                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 365                                      gint bytes_per_pixel, gboolean counter_clockwise)
 366 {
 367         gint i, j;
 368         guchar *sp;
 369         guchar *dp;
 370
 371         for (i = 0; i < h; i++)
 372                 {
 373                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 374                 for (j = 0; j < w; j++)
 375                         {
 376                         if (counter_clockwise)
 377                                 {
 378                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 379                                 }
 380                         else
 381                                 {
 382                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 383                                 }
 384                         *(dp++) = *(sp++);      /* r */
 385                         *(dp++) = *(sp++);      /* g */
 386                         *(dp++) = *(sp++);      /* b */
 387                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 388                         }
 389                 }
 390
 391 }
 392
 393 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 394                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 395 {
 396         gint i;
 397         guchar *sp;
 398         guchar *dp;
 399
 400         for (i = 0; i < h; i++)
 401                 {
 402                 sp = src + (i * src_row_stride);
 403                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 404                 memcpy(dp, sp, w * bytes_per_pixel);
 405                 }
 406 }
 407
 408 #define ROTATE_BUFFER_WIDTH 48
 409 #define ROTATE_BUFFER_HEIGHT 48
 410
 411 /*
 412  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 413  *
 414  */
 415 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 416 {
 417         GdkPixbuf *dest;
 418         gboolean has_alpha;
 419         gint sw, sh, srs;
 420         gint dw, dh, drs;
 421         guchar *s_pix;
 422         guchar *d_pix;
 423         gint i, j;
 424         gint a;
 425         GdkPixbuf *buffer;
 426         guchar *b_pix;
 427         gint brs;
 428         gint w, h;
 429
 430         if (!src) return NULL;
 431
 432         sw = gdk_pixbuf_get_width(src);
 433         sh = gdk_pixbuf_get_height(src);
 434         has_alpha = gdk_pixbuf_get_has_alpha(src);
 435         srs = gdk_pixbuf_get_rowstride(src);
 436         s_pix = gdk_pixbuf_get_pixels(src);
 437
 438         dw = sh;
 439         dh = sw;
 440         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 441         drs = gdk_pixbuf_get_rowstride(dest);
 442         d_pix = gdk_pixbuf_get_pixels(dest);
 443
 444         a = (has_alpha ? 4 : 3);
 445
 446         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 447                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 448         b_pix = gdk_pixbuf_get_pixels(buffer);
 449         brs = gdk_pixbuf_get_rowstride(buffer);
 450
 451         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 452                 {
 453                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 454                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 455                         {
 456                         gint x, y;
 457
 458                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 459                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 460                                                  b_pix, brs, h, w,
 461                                                  a, counter_clockwise);
 462
 463                         if (counter_clockwise)
 464                                 {
 465                                 x = i;
 466                                 y = sw - h - j;
 467                                 }
 468                         else
 469                                 {
 470                                 x = sh - w - i;
 471                                 y = j;
 472                                 }
 473                         pixbuf_copy_block(b_pix, brs, w, h,
 474                                           d_pix, drs, x, y, a);
 475                         }
 476                 }
 477
 478         g_object_unref(buffer);
 479
 480 #if 0
 481         /* this is the simple version of rotation (roughly 2-4x slower) */
 482
 483         for (i = 0; i < sh; i++)
 484                 {
 485                 sp = s_pix + (i * srs);
 486                 for (j = 0; j < sw; j++)
 487                         {
 488                         if (counter_clockwise)
 489                                 {
 490                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 491                                 }
 492                         else
 493                                 {
 494                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 495                                 }
 496
 497                         *(dp++) = *(sp++);      /* r */
 498                         *(dp++) = *(sp++);      /* g */
 499                         *(dp++) = *(sp++);      /* b */
 500                         if (has_alpha) *(dp) = *(sp++); /* a */
 501                         }
 502                 }
 503 #endif
 504
 505         return dest;
 506 }
 507
 508 /*
 509  * Returns a copy of pixbuf mirrored and or flipped.
 510  * TO do a 180 degree rotations set both mirror and flipped TRUE
 511  * if mirror and flip are FALSE, result is a simple copy.
 512  */
 513 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 514 {
 515         GdkPixbuf *dest;
 516         gboolean has_alpha;
 517         gint w, h, srs;
 518         gint drs;
 519         guchar *s_pix;
 520         guchar *d_pix;
 521         guchar *sp;
 522         guchar *dp;
 523         gint i, j;
 524         gint a;
 525
 526         if (!src) return NULL;
 527
 528         w = gdk_pixbuf_get_width(src);
 529         h = gdk_pixbuf_get_height(src);
 530         has_alpha = gdk_pixbuf_get_has_alpha(src);
 531         srs = gdk_pixbuf_get_rowstride(src);
 532         s_pix = gdk_pixbuf_get_pixels(src);
 533
 534         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 535         drs = gdk_pixbuf_get_rowstride(dest);
 536         d_pix = gdk_pixbuf_get_pixels(dest);
 537
 538         a = has_alpha ? 4 : 3;
 539
 540         for (i = 0; i < h; i++)
 541                 {
 542                 sp = s_pix + (i * srs);
 543                 if (flip)
 544                         {
 545                         dp = d_pix + ((h - i - 1) * drs);
 546                         }
 547                 else
 548                         {
 549                         dp = d_pix + (i * drs);
 550                         }
 551                 if (mirror)
 552                         {
 553                         dp += (w - 1) * a;
 554                         for (j = 0; j < w; j++)
 555                                 {
 556                                 *(dp++) = *(sp++);      /* r */
 557                                 *(dp++) = *(sp++);      /* g */
 558                                 *(dp++) = *(sp++);      /* b */
 559                                 if (has_alpha) *(dp) = *(sp++); /* a */
 560                                 dp -= (a + 3);
 561                                 }
 562                         }
 563                 else
 564                         {
 565                         for (j = 0; j < w; j++)
 566                                 {
 567                                 *(dp++) = *(sp++);      /* r */
 568                                 *(dp++) = *(sp++);      /* g */
 569                                 *(dp++) = *(sp++);      /* b */
 570                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 571                                 }
 572                         }
 573                 }
 574
 575         return dest;
 576 }
 577
 578 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 579 {
 580         GdkPixbuf *dest;
 581         GdkPixbuf *tmp = NULL;
 582
 583         switch (orientation)
 584                 {
 585                 case EXIF_ORIENTATION_TOP_LEFT:
 586                         dest = gdk_pixbuf_copy(pixbuf);
 587                         break;
 588                 case EXIF_ORIENTATION_TOP_RIGHT:
 589                         /* mirrored */
 590                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 591                         break;
 592                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 593                         /* upside down */
 594                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 595                         break;
 596                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 597                         /* flipped */
 598                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 599                         break;
 600                 case EXIF_ORIENTATION_LEFT_TOP:
 601                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 602                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 603                         break;
 604                 case EXIF_ORIENTATION_RIGHT_TOP:
 605                         /* rotated -90 (270) */
 606                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 607                         break;
 608                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 609                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 610                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 611                         break;
 612                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 613                         /* rotated 90 */
 614                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 615                         break;
 616                 default:
 617                         dest = gdk_pixbuf_copy(pixbuf);
 618                         break;
 619                 }
 620         if (tmp) g_object_unref(tmp);
 621         return dest;
 622
 623 }
 624
 625
 626 /*
 627  *-----------------------------------------------------------------------------
 628  * pixbuf drawing (rectangles)
 629  *-----------------------------------------------------------------------------
 630  */
 631
 632 /*
 633  * Fills region of pixbuf at x,y over w,h
 634  * with colors red (r), green (g), blue (b)
 635  * applying alpha (a), use a=255 for solid.
 636  */
 637 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 638                            gint x, gint y, gint w, gint h,
 639                            gint r, gint g, gint b, gint a)
 640 {
 641         gboolean has_alpha;
 642         gint pw, ph, prs;
 643         guchar *p_pix;
 644         guchar *pp;
 645         gint i, j;
 646
 647         if (!pb) return;
 648
 649         pw = gdk_pixbuf_get_width(pb);
 650         ph = gdk_pixbuf_get_height(pb);
 651
 652         if (x < 0 || x + w > pw) return;
 653         if (y < 0 || y + h > ph) return;
 654
 655         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 656         prs = gdk_pixbuf_get_rowstride(pb);
 657         p_pix = gdk_pixbuf_get_pixels(pb);
 658
 659         for (i = 0; i < h; i++)
 660                 {
 661                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 662                 for (j = 0; j < w; j++)
 663                         {
 664                         *pp = (r * a + *pp * (256-a)) >> 8;
 665                         pp++;
 666                         *pp = (g * a + *pp * (256-a)) >> 8;
 667                         pp++;
 668                         *pp = (b * a + *pp * (256-a)) >> 8;
 669                         pp++;
 670                         if (has_alpha) pp++;
 671                         }
 672                 }
 673 }
 674
 675 void pixbuf_draw_rect(GdkPixbuf *pb,
 676                       gint x, gint y, gint w, gint h,
 677                       gint r, gint g, gint b, gint a,
 678                       gint left, gint right, gint top, gint bottom)
 679 {
 680         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 681                               r, g, b ,a);
 682         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 683                               r, g, b ,a);
 684         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 685                               r, g, b ,a);
 686         pixbuf_draw_rect_fill(pb, x, y, left, h,
 687                               r, g, b ,a);
 688 }
 689
 690 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 691                           gint x, gint y, gint w, gint h,
 692                           gint r, gint g, gint b, gint a)
 693 {
 694         gboolean has_alpha;
 695         gint pw, ph, prs;
 696         guchar *p_pix;
 697         guchar *pp;
 698         gint i, j;
 699
 700         if (!pb) return;
 701
 702         pw = gdk_pixbuf_get_width(pb);
 703         ph = gdk_pixbuf_get_height(pb);
 704
 705         if (x < 0 || x + w > pw) return;
 706         if (y < 0 || y + h > ph) return;
 707
 708         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 709         prs = gdk_pixbuf_get_rowstride(pb);
 710         p_pix = gdk_pixbuf_get_pixels(pb);
 711
 712         for (i = 0; i < h; i++)
 713                 {
 714                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 715                 for (j = 0; j < w; j++)
 716                         {
 717                         *pp = r; pp++;
 718                         *pp = g; pp++;
 719                         *pp = b; pp++;
 720                         if (has_alpha) { *pp = a; pp++; }
 721                         }
 722                 }
 723 }
 724
 725 void pixbuf_set_rect(GdkPixbuf *pb,
 726                      gint x, gint y, gint w, gint h,
 727                      gint r, gint g, gint b, gint a,
 728                      gint left, gint right, gint top, gint bottom)
 729 {
 730         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 731                              r, g, b ,a);
 732         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 733                              r, g, b ,a);
 734         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 735                              r, g, b ,a);
 736         pixbuf_set_rect_fill(pb, x, y, left, h,
 737                              r, g, b ,a);
 738 }
 739
 740 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 741 {
 742         guchar *buf;
 743         gboolean has_alpha;
 744         gint rowstride;
 745         guchar *p;
 746
 747         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 748             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 749
 750         buf = gdk_pixbuf_get_pixels(pb);
 751         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 752         rowstride = gdk_pixbuf_get_rowstride(pb);
 753
 754         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 755         *p = r; p++;
 756         *p = g; p++;
 757         *p = b; p++;
 758         if (has_alpha) *p = a;
 759 }
 760
 761
 762 /*
 763  *-----------------------------------------------------------------------------
 764  * pixbuf text rendering
 765  *-----------------------------------------------------------------------------
 766  */
 767
 768 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 769                              GdkPixbuf *dest, gint dx, gint dy,
 770                              gint w, gint h,
 771                              guint8 r, guint8 g, guint8 b, guint8 a)
 772 {
 773         gint sw, sh, srs;
 774         gboolean s_alpha;
 775         gint s_step;
 776         guchar *s_pix;
 777         gint dw, dh, drs;
 778         gboolean d_alpha;
 779         gint d_step;
 780         guchar *d_pix;
 781
 782         guchar *sp;
 783         guchar *dp;
 784         gint i, j;
 785
 786         if (!src || !dest) return;
 787
 788         sw = gdk_pixbuf_get_width(src);
 789         sh = gdk_pixbuf_get_height(src);
 790
 791         if (sx < 0 || sx + w > sw) return;
 792         if (sy < 0 || sy + h > sh) return;
 793
 794         dw = gdk_pixbuf_get_width(dest);
 795         dh = gdk_pixbuf_get_height(dest);
 796
 797         if (dx < 0 || dx + w > dw) return;
 798         if (dy < 0 || dy + h > dh) return;
 799
 800         s_alpha = gdk_pixbuf_get_has_alpha(src);
 801         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 802         srs = gdk_pixbuf_get_rowstride(src);
 803         drs = gdk_pixbuf_get_rowstride(dest);
 804         s_pix = gdk_pixbuf_get_pixels(src);
 805         d_pix = gdk_pixbuf_get_pixels(dest);
 806
 807         s_step = (s_alpha) ? 4 : 3;
 808         d_step = (d_alpha) ? 4 : 3;
 809
 810         for (i = 0; i < h; i++)
 811                 {
 812                 sp = s_pix + (sy + i) * srs + sx * s_step;
 813                 dp = d_pix + (dy + i) * drs + dx * d_step;
 814                 for (j = 0; j < w; j++)
 815                         {
 816                         if (*sp)
 817                                 {
 818                                 guint8 asub;
 819
 820                                 asub = a * sp[0] / 255;
 821                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 822                                 dp++;
 823                                 asub = a * sp[1] / 255;
 824                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 825                                 dp++;
 826                                 asub = a * sp[2] / 255;
 827                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 828                                 dp++;
 829
 830                                 if (d_alpha)
 831                                         {
 832                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 833                                         dp++;
 834                                         }
 835                                 }
 836                         else
 837                                 {
 838                                 dp += d_step;
 839                                 }
 840
 841                         sp += s_step;
 842                         }
 843                 }
 844 }
 845
 846 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 847                         gint x, gint y,
 848                         guint8 r, guint8 g, guint8 b, guint8 a)
 849 {
 850         GdkPixbuf *buffer;
 851         gint w, h;
 852         gint sx, sy;
 853         gint dw, dh;
 854         cairo_surface_t *source;
 855         cairo_t *cr;
 856
 857         pango_layout_get_pixel_size(layout, &w, &h);
 858         if (w < 1 || h < 1) return;
 859
 860         source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
 861
 862         cr = cairo_create (source);
 863         cairo_set_source_rgb(cr, 0, 0, 0);
 864         cairo_rectangle (cr, 0, 0, w, h);
 865         cairo_fill (cr);
 866         cairo_set_source_rgb(cr, 1, 1, 1);
 867         pango_cairo_show_layout (cr, layout);
 868         cairo_destroy (cr);
 869
 870         buffer = gdk_pixbuf_new_from_data (cairo_image_surface_get_data (source),
 871                                            GDK_COLORSPACE_RGB,
 872                                            cairo_image_surface_get_format (source) == CAIRO_FORMAT_ARGB32,
 873                                            8,
 874                                            cairo_image_surface_get_width (source),
 875                                            cairo_image_surface_get_height (source),
 876                                            cairo_image_surface_get_stride (source),
 877                                            NULL,
 878                                            NULL);
 879
 880         sx = 0;
 881         sy = 0;
 882         dw = gdk_pixbuf_get_width(pixbuf);
 883         dh = gdk_pixbuf_get_height(pixbuf);
 884
 885         if (x < 0)
 886                 {
 887                 w += x;
 888                 sx = -x;
 889                 x = 0;
 890                 }
 891
 892         if (y < 0)
 893                 {
 894                 h += y;
 895                 sy = -y;
 896                 y = 0;
 897                 }
 898
 899         if (x + w > dw) w = dw - x;
 900         if (y + h > dh) h = dh - y;
 901
 902         pixbuf_copy_font(buffer, sx, sy,
 903                          pixbuf, x, y, w, h,
 904                          r, g, b, a);
 905
 906         g_object_unref(buffer);
 907         cairo_surface_destroy(source);
 908 }
 909
 910 /*
 911  *-----------------------------------------------------------------------------
 912  * pixbuf drawing (triangle)
 913  *-----------------------------------------------------------------------------
 914  */
 915
 916 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 917                         gint *rx, gint *ry, gint *rw, gint *rh)
 918 {
 919         gint tx, ty, tw, th;
 920
 921         tx = MIN(x1, x2);
 922         tx = MIN(tx, x3);
 923         ty = MIN(y1, y2);
 924         ty = MIN(ty, y3);
 925         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 926         tw = MAX(tw, abs(x3 - x1));
 927         th = MAX(abs(y1 - y2), abs(y2 - y3));
 928         th = MAX(th, abs(y3 - y1));
 929
 930         *rx = tx;
 931         *ry = ty;
 932         *rw = tw;
 933         *rh = th;
 934 }
 935
 936 void pixbuf_draw_triangle(GdkPixbuf *pb,
 937                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 938                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 939                           guint8 r, guint8 g, guint8 b, guint8 a)
 940 {
 941         gboolean has_alpha;
 942         gint pw, ph, prs;
 943         gint rx, ry, rw, rh;
 944         gint tx, ty, tw, th;
 945         gint fx1, fy1;
 946         gint fx2, fy2;
 947         gint fw, fh;
 948         guchar *p_pix;
 949         guchar *pp;
 950         gint p_step;
 951         gdouble slope1, slope2;
 952         gint slope1_x, slope1_y;
 953         gint y;
 954         gint t;
 955         gboolean middle = FALSE;
 956
 957         if (!pb) return;
 958
 959         pw = gdk_pixbuf_get_width(pb);
 960         ph = gdk_pixbuf_get_height(pb);
 961
 962         if (!util_clip_region(0, 0, pw, ph,
 963                               clip_x, clip_y, clip_w, clip_h,
 964                               &rx, &ry, &rw, &rh)) return;
 965
 966         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 967                            &tx, &ty, &tw, &th);
 968
 969         if (!util_clip_region(rx, ry, rw, rh,
 970                               tx, ty, tw, th,
 971                               &fx1, &fy1, &fw, &fh)) return;
 972         fx2 = fx1 + fw;
 973         fy2 = fy1 + fh;
 974
 975         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 976         prs = gdk_pixbuf_get_rowstride(pb);
 977         p_pix = gdk_pixbuf_get_pixels(pb);
 978
 979         p_step = (has_alpha) ? 4 : 3;
 980
 981         if (y1 > y2)
 982                 {
 983                 t = x1; x1 = x2; x2 = t;
 984                 t = y1; y1 = y2; y2 = t;
 985                 }
 986         if (y2 > y3)
 987                 {
 988                 t = x2; x2 = x3; x3 = t;
 989                 t = y2; y2 = y3; y3 = t;
 990                 }
 991         if (y1 > y2)
 992                 {
 993                 t = x1; x1 = x2; x2 = t;
 994                 t = y1; y1 = y2; y2 = t;
 995                 }
 996
 997         slope1 = (gdouble)(y2 - y1);
 998         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
 999         slope1_x = x1;
1000         slope1_y = y1;
1001         slope2 = (gdouble)(y3 - y1);
1002         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
1003
1004         for (y = fy1; y < fy2; y++)
1005                 {
1006                 gint xa, xb;
1007
1008                 if (!middle && y > y2)
1009                         {
1010                         slope1 = (gdouble)(y3 - y2);
1011                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
1012                         slope1_x = x2;
1013                         slope1_y = y2;
1014
1015                         middle = TRUE;
1016                         }
1017
1018                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
1019                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
1020
1021                 if (xa > xb)
1022                         {
1023                         t = xa; xa = xb; xb = t;
1024                         }
1025
1026                 xa = CLAMP(xa, fx1, fx2);
1027                 xb = CLAMP(xb, fx1, fx2);
1028
1029                 pp = p_pix + y * prs + xa * p_step;
1030
1031                 while (xa < xb)
1032                         {
1033                         *pp = (r * a + *pp * (256-a)) >> 8;
1034                         pp++;
1035                         *pp = (g * a + *pp * (256-a)) >> 8;
1036                         pp++;
1037                         *pp = (b * a + *pp * (256-a)) >> 8;
1038                         pp++;
1039                         if (has_alpha) pp++;
1040
1041                         xa++;
1042                         }
1043                 }
1044 }
1045
1046 /*
1047  *-----------------------------------------------------------------------------
1048  * pixbuf drawing (line)
1049  *-----------------------------------------------------------------------------
1050  */
1051
1052 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
1053                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
1054                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
1055 {
1056         gboolean flip = FALSE;
1057         gdouble d;
1058
1059         if (x1 > x2)
1060                 {
1061                 gdouble t;
1062
1063                 t = x1; x1 = x2; x2 = t;
1064                 t = y1; y1 = y2; y2 = t;
1065                 flip = TRUE;
1066                 }
1067
1068         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
1069
1070         if (y1 < y2)
1071                 {
1072                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1073                 }
1074         else
1075                 {
1076                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1077                 }
1078
1079         d = x2 - x1;
1080         if (d > 0.0)
1081                 {
1082                 gdouble slope;
1083
1084                 slope = (y2 - y1) / d;
1085                 if (x1 < clip_x)
1086                         {
1087                         y1 = y1 + slope * (clip_x - x1);
1088                         x1 = clip_x;
1089                         }
1090                 if (x2 > clip_x + clip_w)
1091                         {
1092                         y2 = y2 + slope * (clip_x + clip_w - x2);
1093                         x2 = clip_x + clip_w;
1094                         }
1095                 }
1096
1097         if (y1 < y2)
1098                 {
1099                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1100                 }
1101         else
1102                 {
1103                 gdouble t;
1104
1105                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1106
1107                 t = x1; x1 = x2; x2 = t;
1108                 t = y1; y1 = y2; y2 = t;
1109                 flip = !flip;
1110                 }
1111
1112         d = y2 - y1;
1113         if (d > 0.0)
1114                 {
1115                 gdouble slope;
1116
1117                 slope = (x2 - x1) / d;
1118                 if (y1 < clip_y)
1119                         {
1120                         x1 = x1 + slope * (clip_y - y1);
1121                         y1 = clip_y;
1122                         }
1123                 if (y2 > clip_y + clip_h)
1124                         {
1125                         x2 = x2 + slope * (clip_y + clip_h - y2);
1126                         y2 = clip_y + clip_h;
1127                         }
1128                 }
1129
1130         if (flip)
1131                 {
1132                 *rx1 = x2;
1133                 *ry1 = y2;
1134                 *rx2 = x1;
1135                 *ry2 = y1;
1136                 }
1137         else
1138                 {
1139                 *rx1 = x1;
1140                 *ry1 = y1;
1141                 *rx2 = x2;
1142                 *ry2 = y2;
1143                 }
1144
1145         return TRUE;
1146 }
1147
1148 void pixbuf_draw_line(GdkPixbuf *pb,
1149                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1150                       gint x1, gint y1, gint x2, gint y2,
1151                       guint8 r, guint8 g, guint8 b, guint8 a)
1152 {
1153         gboolean has_alpha;
1154         gint pw, ph, prs;
1155         gint rx, ry, rw, rh;
1156         gdouble rx1, ry1, rx2, ry2;
1157         guchar *p_pix;
1158         guchar *pp;
1159         gint p_step;
1160         gdouble slope;
1161         gdouble x, y;
1162         gint px, py;
1163         gint cx1, cy1, cx2, cy2;
1164
1165         if (!pb) return;
1166
1167         pw = gdk_pixbuf_get_width(pb);
1168         ph = gdk_pixbuf_get_height(pb);
1169
1170         if (!util_clip_region(0, 0, pw, ph,
1171                               clip_x, clip_y, clip_w, clip_h,
1172                               &rx, &ry, &rw, &rh)) return;
1173         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
1174                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
1175                             &rx1, &ry1, &rx2, &ry2)) return;
1176
1177         cx1 = rx;
1178         cy1 = ry;
1179         cx2 = rx + rw;
1180         cy2 = ry + rh;
1181
1182         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1183         prs = gdk_pixbuf_get_rowstride(pb);
1184         p_pix = gdk_pixbuf_get_pixels(pb);
1185
1186         p_step = (has_alpha) ? 4 : 3;
1187
1188         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1189                 {
1190                 if (rx1 > rx2)
1191                         {
1192                         gdouble t;
1193                         t = rx1; rx1 = rx2; rx2 = t;
1194                         t = ry1; ry1 = ry2; ry2 = t;
1195                         }
1196
1197                 slope = rx2 - rx1;
1198                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1199                 for (x = rx1; x < rx2; x += 1.0)
1200                         {
1201                         px = (gint)(x + 0.5);
1202                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1203
1204                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1205                                 {
1206                                 pp = p_pix + py * prs + px * p_step;
1207                                 *pp = (r * a + *pp * (256-a)) >> 8;
1208                                 pp++;
1209                                 *pp = (g * a + *pp * (256-a)) >> 8;
1210                                 pp++;
1211                                 *pp = (b * a + *pp * (256-a)) >> 8;
1212                                 }
1213                         }
1214                 }
1215         else
1216                 {
1217                 if (ry1 > ry2)
1218                         {
1219                         gdouble t;
1220                         t = rx1; rx1 = rx2; rx2 = t;
1221                         t = ry1; ry1 = ry2; ry2 = t;
1222                         }
1223
1224                 slope = ry2 - ry1;
1225                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1226                 for (y = ry1; y < ry2; y += 1.0)
1227                         {
1228                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1229                         py = (gint)(y + 0.5);
1230
1231                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1232                                 {
1233                                 pp = p_pix + py * prs + px * p_step;
1234                                 *pp = (r * a + *pp * (256-a)) >> 8;
1235                                 pp++;
1236                                 *pp = (g * a + *pp * (256-a)) >> 8;
1237                                 pp++;
1238                                 *pp = (b * a + *pp * (256-a)) >> 8;
1239                                 }
1240                         }
1241                 }
1242 }
1243
1244 /*
1245  *-----------------------------------------------------------------------------
1246  * pixbuf drawing (fades and shadows)
1247  *-----------------------------------------------------------------------------
1248  */
1249
1250 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1251                                     gint s, gboolean vertical, gint border,
1252                                     gint x1, gint y1, gint x2, gint y2,
1253                                     guint8 r, guint8 g, guint8 b, guint8 a)
1254 {
1255         guchar *pp;
1256         gint p_step;
1257         guint8 n = a;
1258         gint i, j;
1259
1260         p_step = (has_alpha) ? 4 : 3;
1261         for (j = y1; j < y2; j++)
1262                 {
1263                 pp = p_pix + j * prs + x1 * p_step;
1264                 if (!vertical) n = a - a * abs(j - s) / border;
1265                 for (i = x1; i < x2; i++)
1266                         {
1267                         if (vertical) n = a - a * abs(i - s) / border;
1268                         *pp = (r * n + *pp * (256-n)) >> 8;
1269                         pp++;
1270                         *pp = (g * n + *pp * (256-n)) >> 8;
1271                         pp++;
1272                         *pp = (b * n + *pp * (256-n)) >> 8;
1273                         pp++;
1274                         if (has_alpha) pp++;
1275                         }
1276                 }
1277 }
1278
1279 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1280                                     gint sx, gint sy, gint border,
1281                                     gint x1, gint y1, gint x2, gint y2,
1282                                     guint8 r, guint8 g, guint8 b, guint8 a)
1283 {
1284         guchar *pp;
1285         gint p_step;
1286         gint i, j;
1287
1288         p_step = (has_alpha) ? 4 : 3;
1289         for (j = y1; j < y2; j++)
1290                 {
1291                 pp = p_pix + j * prs + x1 * p_step;
1292                 for (i = x1; i < x2; i++)
1293                         {
1294                         guint8 n;
1295                         gint r;
1296
1297                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1298                         n = a - a * r / border;
1299                         *pp = (r * n + *pp * (256-n)) >> 8;
1300                         pp++;
1301                         *pp = (g * n + *pp * (256-n)) >> 8;
1302                         pp++;
1303                         *pp = (b * n + *pp * (256-n)) >> 8;
1304                         pp++;
1305                         if (has_alpha) pp++;
1306                         }
1307                 }
1308 }
1309
1310 void pixbuf_draw_shadow(GdkPixbuf *pb,
1311                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1312                         gint x, gint y, gint w, gint h, gint border,
1313                         guint8 r, guint8 g, guint8 b, guint8 a)
1314 {
1315         gint has_alpha;
1316         gint pw, ph, prs;
1317         gint rx, ry, rw, rh;
1318         gint fx, fy, fw, fh;
1319         guchar *p_pix;
1320
1321         if (!pb) return;
1322
1323         pw = gdk_pixbuf_get_width(pb);
1324         ph = gdk_pixbuf_get_height(pb);
1325
1326         if (!util_clip_region(0, 0, pw, ph,
1327                               clip_x, clip_y, clip_w, clip_h,
1328                               &rx, &ry, &rw, &rh)) return;
1329
1330         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1331         prs = gdk_pixbuf_get_rowstride(pb);
1332         p_pix = gdk_pixbuf_get_pixels(pb);
1333
1334         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1335                              rx, ry, rw, rh,
1336                              &fx, &fy, &fw, &fh))
1337                 {
1338                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1339                 }
1340
1341         if (border < 1) return;
1342
1343         if (util_clip_region(x, y + border, border, h - border * 2,
1344                              rx, ry, rw, rh,
1345                              &fx, &fy, &fw, &fh))
1346                 {
1347                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1348                                         x + border, TRUE, border,
1349                                         fx, fy, fx + fw, fy + fh,
1350                                         r, g, b, a);
1351                 }
1352         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1353                              rx, ry, rw, rh,
1354                              &fx, &fy, &fw, &fh))
1355                 {
1356                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1357                                         x + w - border, TRUE, border,
1358                                         fx, fy, fx + fw, fy + fh,
1359                                         r, g, b, a);
1360                 }
1361         if (util_clip_region(x + border, y, w - border * 2, border,
1362                              rx, ry, rw, rh,
1363                              &fx, &fy, &fw, &fh))
1364                 {
1365                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1366                                         y + border, FALSE, border,
1367                                         fx, fy, fx + fw, fy + fh,
1368                                         r, g, b, a);
1369                 }
1370         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1371                              rx, ry, rw, rh,
1372                              &fx, &fy, &fw, &fh))
1373                 {
1374                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1375                                         y + h - border, FALSE, border,
1376                                         fx, fy, fx + fw, fy + fh,
1377                                         r, g, b, a);
1378                 }
1379         if (util_clip_region(x, y, border, border,
1380                              rx, ry, rw, rh,
1381                              &fx, &fy, &fw, &fh))
1382                 {
1383                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1384                                         x + border, y + border, border,
1385                                         fx, fy, fx + fw, fy + fh,
1386                                         r, g, b, a);
1387                 }
1388         if (util_clip_region(x + w - border, y, border, border,
1389                              rx, ry, rw, rh,
1390                              &fx, &fy, &fw, &fh))
1391                 {
1392                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1393                                         x + w - border, y + border, border,
1394                                         fx, fy, fx + fw, fy + fh,
1395                                         r, g, b, a);
1396                 }
1397         if (util_clip_region(x, y + h - border, border, border,
1398                              rx, ry, rw, rh,
1399                              &fx, &fy, &fw, &fh))
1400                 {
1401                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1402                                         x + border, y + h - border, border,
1403                                         fx, fy, fx + fw, fy + fh,
1404                                         r, g, b, a);
1405                 }
1406         if (util_clip_region(x + w - border, y + h - border, border, border,
1407                              rx, ry, rw, rh,
1408                              &fx, &fy, &fw, &fh))
1409                 {
1410                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1411                                         x + w - border, y + h - border, border,
1412                                         fx, fy, fx + fw, fy + fh,
1413                                         r, g, b, a);
1414                 }
1415 }
1416
1417
1418 /*
1419  *-----------------------------------------------------------------------------
1420  * pixbuf color alterations
1421  *-----------------------------------------------------------------------------
1422  */
1423
1424 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1425                             gint x, gint y, gint w, gint h)
1426 {
1427         gboolean has_alpha;
1428         gint pw, ph, prs;
1429         guchar *p_pix;
1430         guchar *pp;
1431         gint i, j;
1432
1433         if (!pb) return;
1434
1435         pw = gdk_pixbuf_get_width(pb);
1436         ph = gdk_pixbuf_get_height(pb);
1437
1438         if (x < 0 || x + w > pw) return;
1439         if (y < 0 || y + h > ph) return;
1440
1441         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1442         prs = gdk_pixbuf_get_rowstride(pb);
1443         p_pix = gdk_pixbuf_get_pixels(pb);
1444
1445         for (i = 0; i < h; i++)
1446                 {
1447                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1448                 for (j = 0; j < w; j++)
1449                         {
1450                         guint8 grey;
1451
1452                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1453                         *pp = grey;
1454                         pp++;
1455                         *pp = grey;
1456                         pp++;
1457                         *pp = grey;
1458                         pp++;
1459                         if (has_alpha) pp++;
1460                         }
1461                 }
1462 }
1463
1464 /*
1465  *-----------------------------------------------------------------------------
1466  * pixbuf highlight under/over exposure *-----------------------------------------------------------------------------
1467  */
1468 void pixbuf_highlight_overunderexposed(GdkPixbuf *pb, gint x, gint y, gint w, gint h)
1469 {
1470         gboolean has_alpha;
1471         gint pw, ph, prs;
1472         guchar *p_pix;
1473         guchar *pp;
1474         gint i, j;
1475
1476         if (!pb) return;
1477
1478         pw = gdk_pixbuf_get_width(pb);
1479         ph = gdk_pixbuf_get_height(pb);
1480
1481         if (x < 0 || x + w > pw) return;
1482         if (y < 0 || y + h > ph) return;
1483
1484         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1485         prs = gdk_pixbuf_get_rowstride(pb);
1486         p_pix = gdk_pixbuf_get_pixels(pb);
1487
1488         for (i = 0; i < h; i++)
1489                 {
1490                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1491                 for (j = 0; j < w; j++)
1492                         {
1493                         if (pp[0] == 255 || pp[1] == 255 || pp[2] == 255 || pp[0] == 0 || pp[1] == 0 || pp[2] == 0)
1494                                 {
1495                                 *pp = 255;
1496                                 pp++;
1497                                 *pp = 0;
1498                                 pp++;
1499                                 *pp = 0;
1500                                 pp++;
1501                                 if (has_alpha) pp++;
1502                                 }
1503                         else
1504                                 {
1505                                 pp = pp + 3;
1506                                 if (has_alpha) pp++;
1507                                 }
1508                         }
1509                 }
1510 }
1511
1512 /*
1513  *-----------------------------------------------------------------------------
1514  * pixbuf ignore alpha
1515  *-----------------------------------------------------------------------------
1516 */
1517 void pixbuf_ignore_alpha_rect(GdkPixbuf *pb,
1518                  gint x, gint y, gint w, gint h)
1519 {
1520    gboolean has_alpha;
1521    gint pw, ph, prs;
1522    guchar *p_pix;
1523    guchar *pp;
1524    gint i, j;
1525
1526    if (!pb) return;
1527
1528    pw = gdk_pixbuf_get_width(pb);
1529    ph = gdk_pixbuf_get_height(pb);
1530
1531    if (x < 0 || x + w > pw) return;
1532    if (y < 0 || y + h > ph) return;
1533
1534    has_alpha = gdk_pixbuf_get_has_alpha(pb);
1535    if (!has_alpha) return;
1536
1537    prs = gdk_pixbuf_get_rowstride(pb);
1538    p_pix = gdk_pixbuf_get_pixels(pb);
1539
1540    for (i = 0; i < h; i++)
1541        {
1542        pp = p_pix + (y + i) * prs + (x * 4 );
1543        for (j = 0; j < w; j++)
1544            {
1545            pp[3] = 0xff;
1546            pp+=4;
1547            }
1548        }
1549 }
1550 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */