src/pixbuf_util.c

   1 /*
   2  * Copyright (C) 2004 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: John Ellis
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include "main.h"
  23 #include "pixbuf_util.h"
  24 #include "exif.h"
  25 #include "ui_fileops.h"
  26
  27 #include "icons/icons_inline.h"
  28
  29 #include <math.h>
  30
  31
  32 /*
  33  *-----------------------------------------------------------------------------
  34  * png save
  35  *-----------------------------------------------------------------------------
  36  */
  37
  38 gboolean pixbuf_to_file_as_png(GdkPixbuf *pixbuf, const gchar *filename)
  39 {
  40         GError *error = NULL;
  41         gboolean ret;
  42
  43         if (!pixbuf || !filename) return FALSE;
  44
  45         ret = gdk_pixbuf_save(pixbuf, filename, "png", &error,
  46                               "tEXt::Software", GQ_APPNAME " " VERSION, NULL);
  47
  48         if (error)
  49                 {
  50                 log_printf("Error saving png file: %s\n", error->message);
  51                 g_error_free(error);
  52                 }
  53
  54         return ret;
  55 }
  56
  57 /*
  58  *-----------------------------------------------------------------------------
  59  * jpeg save
  60  *-----------------------------------------------------------------------------
  61  */
  62
  63 gboolean pixbuf_to_file_as_jpg(GdkPixbuf *pixbuf, const gchar *filename, gint quality)
  64 {
  65         GError *error = NULL;
  66         gchar *qbuf;
  67         gboolean ret;
  68
  69         if (!pixbuf || !filename) return FALSE;
  70
  71         if (quality == -1) quality = 75;
  72         if (quality < 1 || quality > 100)
  73                 {
  74                 log_printf("Jpeg not saved, invalid quality %d\n", quality);
  75                 return FALSE;
  76                 }
  77
  78         qbuf = g_strdup_printf("%d", quality);
  79         ret = gdk_pixbuf_save(pixbuf, filename, "jpeg", &error, "quality", qbuf, NULL);
  80         g_free(qbuf);
  81
  82         if (error)
  83                 {
  84                 log_printf("Error saving jpeg to %s\n%s\n", filename, error->message);
  85                 g_error_free(error);
  86                 }
  87
  88         return ret;
  89 }
  90
  91 /*
  92  *-----------------------------------------------------------------------------
  93  * pixbuf from inline
  94  *-----------------------------------------------------------------------------
  95  */
  96
  97 typedef struct _PixbufInline PixbufInline;
  98 struct _PixbufInline
  99 {
 100         const gchar *key;
 101         const guint8 *data;
 102 };
 103
 104 static PixbufInline inline_pixbuf_data[] = {
 105         { PIXBUF_INLINE_FOLDER_CLOSED,  folder_closed },
 106         { PIXBUF_INLINE_FOLDER_LOCKED,  folder_locked },
 107         { PIXBUF_INLINE_FOLDER_OPEN,    folder_open },
 108         { PIXBUF_INLINE_FOLDER_UP,      folder_up },
 109         { PIXBUF_INLINE_SCROLLER,       icon_scroller },
 110         { PIXBUF_INLINE_BROKEN,         icon_broken },
 111         { PIXBUF_INLINE_METADATA,       icon_metadata },
 112         { PIXBUF_INLINE_UNKNOWN,        icon_unknown },
 113         { PIXBUF_INLINE_VIDEO,          icon_video },
 114         { PIXBUF_INLINE_COLLECTION,     icon_collection },
 115         { PIXBUF_INLINE_ICON,           gqview_icon },
 116         { PIXBUF_INLINE_LOGO,           geeqie_logo },
 117         { PIXBUF_INLINE_ICON_FLOAT,     icon_float },
 118         { PIXBUF_INLINE_ICON_THUMB,     icon_thumb },
 119         { PIXBUF_INLINE_ICON_BOOK,      icon_book },
 120         { PIXBUF_INLINE_ICON_CONFIG,    icon_config },
 121         { PIXBUF_INLINE_ICON_TOOLS,     icon_tools },
 122         { PIXBUF_INLINE_ICON_VIEW,      icon_view },
 123         { PIXBUF_INLINE_ICON_GUIDELINES,        icon_guidelines },
 124         { PIXBUF_INLINE_ICON_PANORAMA,  icon_panorama },
 125         { PIXBUF_INLINE_ICON_MAINTENANCE,       icon_maintenance },
 126         { PIXBUF_INLINE_ICON_ZOOMFILLHOR,       icon_zoomfillhor },
 127         { PIXBUF_INLINE_ICON_ZOOMFILLVERT,      icon_zoomfillvert },
 128         { PIXBUF_INLINE_ICON_HIDETOOLS, icon_hidetools },
 129         { PIXBUF_INLINE_ICON_EXIF,      icon_exif },
 130         { PIXBUF_INLINE_ICON_MARKS,     icon_marks },
 131         { PIXBUF_INLINE_ICON_INFO,      icon_info },
 132         { PIXBUF_INLINE_ICON_SORT,      icon_sort },
 133         { PIXBUF_INLINE_ICON_PDF,       icon_pdf },
 134         { PIXBUF_INLINE_ICON_DRAW_RECTANGLE,    icon_draw_rectangle },
 135         { PIXBUF_INLINE_ICON_MOVE,      icon_move },
 136         { PIXBUF_INLINE_ICON_RENAME,    icon_rename },
 137         { PIXBUF_INLINE_ICON_SELECT_ALL,        icon_select_all },
 138         { PIXBUF_INLINE_ICON_SELECT_NONE,       icon_select_none },
 139         { PIXBUF_INLINE_ICON_SELECT_INVERT,     icon_select_invert },
 140         { PIXBUF_INLINE_ICON_SELECT_RECTANGLE,  icon_select_rectangle },
 141         { PIXBUF_INLINE_ICON_FILE_FILTER,       icon_file_filter },
 142         { PIXBUF_INLINE_ICON_CW,        icon_rotate_clockwise },
 143         { PIXBUF_INLINE_ICON_CCW,       icon_rotate_counter_clockwise },
 144         { PIXBUF_INLINE_ICON_180,       icon_rotate_180 },
 145         { PIXBUF_INLINE_ICON_MIRROR,    icon_mirror },
 146         { PIXBUF_INLINE_ICON_FLIP,      icon_flip },
 147         { PIXBUF_INLINE_ICON_ORIGINAL,  icon_original },
 148         { PIXBUF_INLINE_ICON_TRASH,     icon_trash },
 149         { PIXBUF_INLINE_ICON_HEIF,      icon_heic },
 150         { PIXBUF_INLINE_ICON_GRAYSCALE, icon_grayscale },
 151         { NULL, NULL }
 152 };
 153
 154 GdkPixbuf *pixbuf_inline(const gchar *key)
 155 {
 156         gint i;
 157
 158         if (!key) return NULL;
 159
 160         i = 0;
 161         while (inline_pixbuf_data[i].key)
 162                 {
 163                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 164                         {
 165                         return gdk_pixbuf_new_from_inline(-1, inline_pixbuf_data[i].data, FALSE, NULL);
 166                         }
 167                 i++;
 168                 }
 169
 170         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 171
 172         return NULL;
 173 }
 174
 175 static void register_stock_icon(const gchar *key, GdkPixbuf *pixbuf)
 176 {
 177         static GtkIconFactory *icon_factory = NULL;
 178         GtkIconSet *icon_set;
 179
 180         if (!icon_factory)
 181                 {
 182                 icon_factory = gtk_icon_factory_new();
 183                 gtk_icon_factory_add_default(icon_factory);
 184                 }
 185
 186         icon_set = gtk_icon_set_new_from_pixbuf(pixbuf);
 187         gtk_icon_factory_add(icon_factory, key, icon_set);
 188 }
 189
 190
 191 void pixbuf_inline_register_stock_icons(void)
 192 {
 193         gint i;
 194
 195         i = 0;
 196         while (inline_pixbuf_data[i].key)
 197                 {
 198                 register_stock_icon(inline_pixbuf_data[i].key, pixbuf_inline(inline_pixbuf_data[i].key));
 199                 i++;
 200                 }
 201 }
 202
 203 gboolean register_theme_icon_as_stock(const gchar *key, const gchar *icon)
 204 {
 205         GtkIconTheme *icon_theme;
 206         GdkPixbuf *pixbuf;
 207         GError *error = NULL;
 208
 209         icon_theme = gtk_icon_theme_get_default();
 210
 211         if (gtk_icon_theme_has_icon(icon_theme, key)) return FALSE;
 212
 213         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 214                            icon, /* icon name */
 215                            64, /* size */
 216                            0,  /* flags */
 217                            &error);
 218         if (!pixbuf)
 219                 {
 220                 if (error)
 221                         {
 222                         DEBUG_1("Couldn't load icon %s: %s", icon, error->message);
 223                         g_error_free(error);
 224                         error = NULL;
 225                         }
 226
 227                 if (strchr(icon, '.'))
 228                         {
 229                         /* try again without extension */
 230                         gchar *icon2 = remove_extension_from_path(icon);
 231                         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 232                                            icon2, /* icon name */
 233                                            64, /* size */
 234                                            0,  /* flags */
 235                                            &error);
 236                         if (error)
 237                                 {
 238                                 DEBUG_1("Couldn't load icon %s: %s", icon2, error->message);
 239                                 g_error_free(error);
 240                                 error = NULL;
 241
 242                                 /* try as an absolute path */
 243                                 pixbuf = gdk_pixbuf_new_from_file(icon, &error);
 244                                 if (error)
 245                                         {
 246                                         DEBUG_1("Couldn't load icon as absolute path %s: %s", icon, error->message);
 247                                         g_error_free(error);
 248                                         }
 249                                 }
 250                         g_free(icon2);
 251                         }
 252                 }
 253
 254         if (!pixbuf) return FALSE;
 255
 256         register_stock_icon(key, pixbuf);
 257         return TRUE;
 258 }
 259
 260 gboolean pixbuf_scale_aspect(gint req_w, gint req_h,
 261                              gint old_w, gint old_h,
 262                              gint *new_w, gint *new_h)
 263 {
 264         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 265                 {
 266                 *new_w = req_w;
 267                 *new_h = (gdouble)*new_w / old_w * old_h;
 268                 if (*new_h < 1) *new_h = 1;
 269                 }
 270         else
 271                 {
 272                 *new_h = req_h;
 273                 *new_w = (gdouble)*new_h / old_h * old_w;
 274                 if (*new_w < 1) *new_w = 1;
 275                 }
 276
 277         return (*new_w != old_w || *new_h != old_h);
 278 }
 279
 280 GdkPixbuf *pixbuf_fallback(FileData *fd, gint requested_width, gint requested_height)
 281 {
 282         GdkPixbuf *pixbuf;
 283
 284         switch (fd->format_class)
 285                 {
 286                 case FORMAT_CLASS_UNKNOWN:
 287                         pixbuf = pixbuf_inline(PIXBUF_INLINE_UNKNOWN);
 288                         break;
 289                 case FORMAT_CLASS_META:
 290                         pixbuf = pixbuf_inline(PIXBUF_INLINE_METADATA);
 291                         break;
 292                 case FORMAT_CLASS_VIDEO:
 293                         pixbuf = pixbuf_inline(PIXBUF_INLINE_VIDEO);
 294                         break;
 295                 case FORMAT_CLASS_COLLECTION:
 296                         pixbuf = pixbuf_inline(PIXBUF_INLINE_COLLECTION);
 297                         break;
 298                 case FORMAT_CLASS_PDF:
 299                         pixbuf = pixbuf_inline(PIXBUF_INLINE_ICON_PDF);
 300                         break;
 301                 default:
 302                         pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 303                 }
 304
 305         if (requested_width && requested_height)
 306                 {
 307                 gint w = gdk_pixbuf_get_width(pixbuf);
 308                 gint h = gdk_pixbuf_get_height(pixbuf);
 309
 310                 if (w > requested_width || h > requested_height)
 311                         {
 312                         gint nw, nh;
 313
 314                         if (pixbuf_scale_aspect(requested_width, requested_height,
 315                                                           w, h, &nw, &nh))
 316                                 {
 317                                 GdkPixbuf *tmp;
 318
 319                                 tmp = pixbuf;
 320                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 321                                 g_object_unref(G_OBJECT(tmp));
 322                                 }
 323                         }
 324                 }
 325         return pixbuf;
 326 }
 327
 328
 329 /*
 330  *-----------------------------------------------------------------------------
 331  * misc utils
 332  *-----------------------------------------------------------------------------
 333  */
 334
 335 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 336                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 337                           gint *rx, gint *ry, gint *rw, gint *rh)
 338 {
 339         if (clip_x + clip_w <= x ||
 340             clip_x >= x + w ||
 341             clip_y + clip_h <= y ||
 342             clip_y >= y + h)
 343                 {
 344                 return FALSE;
 345                 }
 346
 347         *rx = MAX(x, clip_x);
 348         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 349
 350         *ry = MAX(y, clip_y);
 351         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 352
 353         return TRUE;
 354 }
 355
 356 /*
 357  *-----------------------------------------------------------------------------
 358  * pixbuf rotation
 359  *-----------------------------------------------------------------------------
 360  */
 361
 362 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 363                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 364                                      gint bytes_per_pixel, gboolean counter_clockwise)
 365 {
 366         gint i, j;
 367         guchar *sp;
 368         guchar *dp;
 369
 370         for (i = 0; i < h; i++)
 371                 {
 372                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 373                 for (j = 0; j < w; j++)
 374                         {
 375                         if (counter_clockwise)
 376                                 {
 377                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 378                                 }
 379                         else
 380                                 {
 381                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 382                                 }
 383                         *(dp++) = *(sp++);      /* r */
 384                         *(dp++) = *(sp++);      /* g */
 385                         *(dp++) = *(sp++);      /* b */
 386                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 387                         }
 388                 }
 389
 390 }
 391
 392 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 393                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 394 {
 395         gint i;
 396         guchar *sp;
 397         guchar *dp;
 398
 399         for (i = 0; i < h; i++)
 400                 {
 401                 sp = src + (i * src_row_stride);
 402                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 403                 memcpy(dp, sp, w * bytes_per_pixel);
 404                 }
 405 }
 406
 407 #define ROTATE_BUFFER_WIDTH 48
 408 #define ROTATE_BUFFER_HEIGHT 48
 409
 410 /*
 411  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 412  *
 413  */
 414 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 415 {
 416         GdkPixbuf *dest;
 417         gboolean has_alpha;
 418         gint sw, sh, srs;
 419         gint dw, dh, drs;
 420         guchar *s_pix;
 421         guchar *d_pix;
 422         gint i, j;
 423         gint a;
 424         GdkPixbuf *buffer;
 425         guchar *b_pix;
 426         gint brs;
 427         gint w, h;
 428
 429         if (!src) return NULL;
 430
 431         sw = gdk_pixbuf_get_width(src);
 432         sh = gdk_pixbuf_get_height(src);
 433         has_alpha = gdk_pixbuf_get_has_alpha(src);
 434         srs = gdk_pixbuf_get_rowstride(src);
 435         s_pix = gdk_pixbuf_get_pixels(src);
 436
 437         dw = sh;
 438         dh = sw;
 439         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 440         drs = gdk_pixbuf_get_rowstride(dest);
 441         d_pix = gdk_pixbuf_get_pixels(dest);
 442
 443         a = (has_alpha ? 4 : 3);
 444
 445         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 446                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 447         b_pix = gdk_pixbuf_get_pixels(buffer);
 448         brs = gdk_pixbuf_get_rowstride(buffer);
 449
 450         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 451                 {
 452                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 453                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 454                         {
 455                         gint x, y;
 456
 457                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 458                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 459                                                  b_pix, brs, h, w,
 460                                                  a, counter_clockwise);
 461
 462                         if (counter_clockwise)
 463                                 {
 464                                 x = i;
 465                                 y = sw - h - j;
 466                                 }
 467                         else
 468                                 {
 469                                 x = sh - w - i;
 470                                 y = j;
 471                                 }
 472                         pixbuf_copy_block(b_pix, brs, w, h,
 473                                           d_pix, drs, x, y, a);
 474                         }
 475                 }
 476
 477         g_object_unref(buffer);
 478
 479 #if 0
 480         /* this is the simple version of rotation (roughly 2-4x slower) */
 481
 482         for (i = 0; i < sh; i++)
 483                 {
 484                 sp = s_pix + (i * srs);
 485                 for (j = 0; j < sw; j++)
 486                         {
 487                         if (counter_clockwise)
 488                                 {
 489                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 490                                 }
 491                         else
 492                                 {
 493                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 494                                 }
 495
 496                         *(dp++) = *(sp++);      /* r */
 497                         *(dp++) = *(sp++);      /* g */
 498                         *(dp++) = *(sp++);      /* b */
 499                         if (has_alpha) *(dp) = *(sp++); /* a */
 500                         }
 501                 }
 502 #endif
 503
 504         return dest;
 505 }
 506
 507 /*
 508  * Returns a copy of pixbuf mirrored and or flipped.
 509  * TO do a 180 degree rotations set both mirror and flipped TRUE
 510  * if mirror and flip are FALSE, result is a simple copy.
 511  */
 512 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 513 {
 514         GdkPixbuf *dest;
 515         gboolean has_alpha;
 516         gint w, h, srs;
 517         gint drs;
 518         guchar *s_pix;
 519         guchar *d_pix;
 520         guchar *sp;
 521         guchar *dp;
 522         gint i, j;
 523         gint a;
 524
 525         if (!src) return NULL;
 526
 527         w = gdk_pixbuf_get_width(src);
 528         h = gdk_pixbuf_get_height(src);
 529         has_alpha = gdk_pixbuf_get_has_alpha(src);
 530         srs = gdk_pixbuf_get_rowstride(src);
 531         s_pix = gdk_pixbuf_get_pixels(src);
 532
 533         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 534         drs = gdk_pixbuf_get_rowstride(dest);
 535         d_pix = gdk_pixbuf_get_pixels(dest);
 536
 537         a = has_alpha ? 4 : 3;
 538
 539         for (i = 0; i < h; i++)
 540                 {
 541                 sp = s_pix + (i * srs);
 542                 if (flip)
 543                         {
 544                         dp = d_pix + ((h - i - 1) * drs);
 545                         }
 546                 else
 547                         {
 548                         dp = d_pix + (i * drs);
 549                         }
 550                 if (mirror)
 551                         {
 552                         dp += (w - 1) * a;
 553                         for (j = 0; j < w; j++)
 554                                 {
 555                                 *(dp++) = *(sp++);      /* r */
 556                                 *(dp++) = *(sp++);      /* g */
 557                                 *(dp++) = *(sp++);      /* b */
 558                                 if (has_alpha) *(dp) = *(sp++); /* a */
 559                                 dp -= (a + 3);
 560                                 }
 561                         }
 562                 else
 563                         {
 564                         for (j = 0; j < w; j++)
 565                                 {
 566                                 *(dp++) = *(sp++);      /* r */
 567                                 *(dp++) = *(sp++);      /* g */
 568                                 *(dp++) = *(sp++);      /* b */
 569                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 570                                 }
 571                         }
 572                 }
 573
 574         return dest;
 575 }
 576
 577 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 578 {
 579         GdkPixbuf *dest;
 580         GdkPixbuf *tmp = NULL;
 581
 582         switch (orientation)
 583                 {
 584                 case EXIF_ORIENTATION_TOP_LEFT:
 585                         dest = gdk_pixbuf_copy(pixbuf);
 586                         break;
 587                 case EXIF_ORIENTATION_TOP_RIGHT:
 588                         /* mirrored */
 589                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 590                         break;
 591                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 592                         /* upside down */
 593                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 594                         break;
 595                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 596                         /* flipped */
 597                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 598                         break;
 599                 case EXIF_ORIENTATION_LEFT_TOP:
 600                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 601                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 602                         break;
 603                 case EXIF_ORIENTATION_RIGHT_TOP:
 604                         /* rotated -90 (270) */
 605                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 606                         break;
 607                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 608                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 609                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 610                         break;
 611                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 612                         /* rotated 90 */
 613                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 614                         break;
 615                 default:
 616                         dest = gdk_pixbuf_copy(pixbuf);
 617                         break;
 618                 }
 619         if (tmp) g_object_unref(tmp);
 620         return dest;
 621
 622 }
 623
 624
 625 /*
 626  *-----------------------------------------------------------------------------
 627  * pixbuf drawing (rectangles)
 628  *-----------------------------------------------------------------------------
 629  */
 630
 631 /*
 632  * Fills region of pixbuf at x,y over w,h
 633  * with colors red (r), green (g), blue (b)
 634  * applying alpha (a), use a=255 for solid.
 635  */
 636 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 637                            gint x, gint y, gint w, gint h,
 638                            gint r, gint g, gint b, gint a)
 639 {
 640         gboolean has_alpha;
 641         gint pw, ph, prs;
 642         guchar *p_pix;
 643         guchar *pp;
 644         gint i, j;
 645
 646         if (!pb) return;
 647
 648         pw = gdk_pixbuf_get_width(pb);
 649         ph = gdk_pixbuf_get_height(pb);
 650
 651         if (x < 0 || x + w > pw) return;
 652         if (y < 0 || y + h > ph) return;
 653
 654         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 655         prs = gdk_pixbuf_get_rowstride(pb);
 656         p_pix = gdk_pixbuf_get_pixels(pb);
 657
 658         for (i = 0; i < h; i++)
 659                 {
 660                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 661                 for (j = 0; j < w; j++)
 662                         {
 663                         *pp = (r * a + *pp * (256-a)) >> 8;
 664                         pp++;
 665                         *pp = (g * a + *pp * (256-a)) >> 8;
 666                         pp++;
 667                         *pp = (b * a + *pp * (256-a)) >> 8;
 668                         pp++;
 669                         if (has_alpha) pp++;
 670                         }
 671                 }
 672 }
 673
 674 void pixbuf_draw_rect(GdkPixbuf *pb,
 675                       gint x, gint y, gint w, gint h,
 676                       gint r, gint g, gint b, gint a,
 677                       gint left, gint right, gint top, gint bottom)
 678 {
 679         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 680                               r, g, b ,a);
 681         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 682                               r, g, b ,a);
 683         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 684                               r, g, b ,a);
 685         pixbuf_draw_rect_fill(pb, x, y, left, h,
 686                               r, g, b ,a);
 687 }
 688
 689 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 690                           gint x, gint y, gint w, gint h,
 691                           gint r, gint g, gint b, gint a)
 692 {
 693         gboolean has_alpha;
 694         gint pw, ph, prs;
 695         guchar *p_pix;
 696         guchar *pp;
 697         gint i, j;
 698
 699         if (!pb) return;
 700
 701         pw = gdk_pixbuf_get_width(pb);
 702         ph = gdk_pixbuf_get_height(pb);
 703
 704         if (x < 0 || x + w > pw) return;
 705         if (y < 0 || y + h > ph) return;
 706
 707         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 708         prs = gdk_pixbuf_get_rowstride(pb);
 709         p_pix = gdk_pixbuf_get_pixels(pb);
 710
 711         for (i = 0; i < h; i++)
 712                 {
 713                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 714                 for (j = 0; j < w; j++)
 715                         {
 716                         *pp = r; pp++;
 717                         *pp = g; pp++;
 718                         *pp = b; pp++;
 719                         if (has_alpha) { *pp = a; pp++; }
 720                         }
 721                 }
 722 }
 723
 724 void pixbuf_set_rect(GdkPixbuf *pb,
 725                      gint x, gint y, gint w, gint h,
 726                      gint r, gint g, gint b, gint a,
 727                      gint left, gint right, gint top, gint bottom)
 728 {
 729         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 730                              r, g, b ,a);
 731         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 732                              r, g, b ,a);
 733         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 734                              r, g, b ,a);
 735         pixbuf_set_rect_fill(pb, x, y, left, h,
 736                              r, g, b ,a);
 737 }
 738
 739 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 740 {
 741         guchar *buf;
 742         gboolean has_alpha;
 743         gint rowstride;
 744         guchar *p;
 745
 746         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 747             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 748
 749         buf = gdk_pixbuf_get_pixels(pb);
 750         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 751         rowstride = gdk_pixbuf_get_rowstride(pb);
 752
 753         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 754         *p = r; p++;
 755         *p = g; p++;
 756         *p = b; p++;
 757         if (has_alpha) *p = a;
 758 }
 759
 760
 761 /*
 762  *-----------------------------------------------------------------------------
 763  * pixbuf text rendering
 764  *-----------------------------------------------------------------------------
 765  */
 766
 767 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 768                              GdkPixbuf *dest, gint dx, gint dy,
 769                              gint w, gint h,
 770                              guint8 r, guint8 g, guint8 b, guint8 a)
 771 {
 772         gint sw, sh, srs;
 773         gboolean s_alpha;
 774         gint s_step;
 775         guchar *s_pix;
 776         gint dw, dh, drs;
 777         gboolean d_alpha;
 778         gint d_step;
 779         guchar *d_pix;
 780
 781         guchar *sp;
 782         guchar *dp;
 783         gint i, j;
 784
 785         if (!src || !dest) return;
 786
 787         sw = gdk_pixbuf_get_width(src);
 788         sh = gdk_pixbuf_get_height(src);
 789
 790         if (sx < 0 || sx + w > sw) return;
 791         if (sy < 0 || sy + h > sh) return;
 792
 793         dw = gdk_pixbuf_get_width(dest);
 794         dh = gdk_pixbuf_get_height(dest);
 795
 796         if (dx < 0 || dx + w > dw) return;
 797         if (dy < 0 || dy + h > dh) return;
 798
 799         s_alpha = gdk_pixbuf_get_has_alpha(src);
 800         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 801         srs = gdk_pixbuf_get_rowstride(src);
 802         drs = gdk_pixbuf_get_rowstride(dest);
 803         s_pix = gdk_pixbuf_get_pixels(src);
 804         d_pix = gdk_pixbuf_get_pixels(dest);
 805
 806         s_step = (s_alpha) ? 4 : 3;
 807         d_step = (d_alpha) ? 4 : 3;
 808
 809         for (i = 0; i < h; i++)
 810                 {
 811                 sp = s_pix + (sy + i) * srs + sx * s_step;
 812                 dp = d_pix + (dy + i) * drs + dx * d_step;
 813                 for (j = 0; j < w; j++)
 814                         {
 815                         if (*sp)
 816                                 {
 817                                 guint8 asub;
 818
 819                                 asub = a * sp[0] / 255;
 820                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 821                                 dp++;
 822                                 asub = a * sp[1] / 255;
 823                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 824                                 dp++;
 825                                 asub = a * sp[2] / 255;
 826                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 827                                 dp++;
 828
 829                                 if (d_alpha)
 830                                         {
 831                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 832                                         dp++;
 833                                         }
 834                                 }
 835                         else
 836                                 {
 837                                 dp += d_step;
 838                                 }
 839
 840                         sp += s_step;
 841                         }
 842                 }
 843 }
 844
 845 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 846                         gint x, gint y,
 847                         guint8 r, guint8 g, guint8 b, guint8 a)
 848 {
 849         GdkPixbuf *buffer;
 850         gint w, h;
 851         gint sx, sy;
 852         gint dw, dh;
 853         cairo_surface_t *source;
 854         cairo_t *cr;
 855
 856         pango_layout_get_pixel_size(layout, &w, &h);
 857         if (w < 1 || h < 1) return;
 858
 859         source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
 860
 861         cr = cairo_create (source);
 862         cairo_set_source_rgb(cr, 0, 0, 0);
 863         cairo_rectangle (cr, 0, 0, w, h);
 864         cairo_fill (cr);
 865         cairo_set_source_rgb(cr, 1, 1, 1);
 866         pango_cairo_show_layout (cr, layout);
 867         cairo_destroy (cr);
 868
 869         buffer = gdk_pixbuf_new_from_data (cairo_image_surface_get_data (source),
 870                                            GDK_COLORSPACE_RGB,
 871                                            cairo_image_surface_get_format (source) == CAIRO_FORMAT_ARGB32,
 872                                            8,
 873                                            cairo_image_surface_get_width (source),
 874                                            cairo_image_surface_get_height (source),
 875                                            cairo_image_surface_get_stride (source),
 876                                            NULL,
 877                                            NULL);
 878
 879         sx = 0;
 880         sy = 0;
 881         dw = gdk_pixbuf_get_width(pixbuf);
 882         dh = gdk_pixbuf_get_height(pixbuf);
 883
 884         if (x < 0)
 885                 {
 886                 w += x;
 887                 sx = -x;
 888                 x = 0;
 889                 }
 890
 891         if (y < 0)
 892                 {
 893                 h += y;
 894                 sy = -y;
 895                 y = 0;
 896                 }
 897
 898         if (x + w > dw) w = dw - x;
 899         if (y + h > dh) h = dh - y;
 900
 901         pixbuf_copy_font(buffer, sx, sy,
 902                          pixbuf, x, y, w, h,
 903                          r, g, b, a);
 904
 905         g_object_unref(buffer);
 906         cairo_surface_destroy(source);
 907 }
 908
 909 /*
 910  *-----------------------------------------------------------------------------
 911  * pixbuf drawing (triangle)
 912  *-----------------------------------------------------------------------------
 913  */
 914
 915 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 916                         gint *rx, gint *ry, gint *rw, gint *rh)
 917 {
 918         gint tx, ty, tw, th;
 919
 920         tx = MIN(x1, x2);
 921         tx = MIN(tx, x3);
 922         ty = MIN(y1, y2);
 923         ty = MIN(ty, y3);
 924         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 925         tw = MAX(tw, abs(x3 - x1));
 926         th = MAX(abs(y1 - y2), abs(y2 - y3));
 927         th = MAX(th, abs(y3 - y1));
 928
 929         *rx = tx;
 930         *ry = ty;
 931         *rw = tw;
 932         *rh = th;
 933 }
 934
 935 void pixbuf_draw_triangle(GdkPixbuf *pb,
 936                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 937                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 938                           guint8 r, guint8 g, guint8 b, guint8 a)
 939 {
 940         gboolean has_alpha;
 941         gint pw, ph, prs;
 942         gint rx, ry, rw, rh;
 943         gint tx, ty, tw, th;
 944         gint fx1, fy1;
 945         gint fx2, fy2;
 946         gint fw, fh;
 947         guchar *p_pix;
 948         guchar *pp;
 949         gint p_step;
 950         gdouble slope1, slope2;
 951         gint slope1_x, slope1_y;
 952         gint y;
 953         gint t;
 954         gboolean middle = FALSE;
 955
 956         if (!pb) return;
 957
 958         pw = gdk_pixbuf_get_width(pb);
 959         ph = gdk_pixbuf_get_height(pb);
 960
 961         if (!util_clip_region(0, 0, pw, ph,
 962                               clip_x, clip_y, clip_w, clip_h,
 963                               &rx, &ry, &rw, &rh)) return;
 964
 965         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 966                            &tx, &ty, &tw, &th);
 967
 968         if (!util_clip_region(rx, ry, rw, rh,
 969                               tx, ty, tw, th,
 970                               &fx1, &fy1, &fw, &fh)) return;
 971         fx2 = fx1 + fw;
 972         fy2 = fy1 + fh;
 973
 974         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 975         prs = gdk_pixbuf_get_rowstride(pb);
 976         p_pix = gdk_pixbuf_get_pixels(pb);
 977
 978         p_step = (has_alpha) ? 4 : 3;
 979
 980         if (y1 > y2)
 981                 {
 982                 t = x1; x1 = x2; x2 = t;
 983                 t = y1; y1 = y2; y2 = t;
 984                 }
 985         if (y2 > y3)
 986                 {
 987                 t = x2; x2 = x3; x3 = t;
 988                 t = y2; y2 = y3; y3 = t;
 989                 }
 990         if (y1 > y2)
 991                 {
 992                 t = x1; x1 = x2; x2 = t;
 993                 t = y1; y1 = y2; y2 = t;
 994                 }
 995
 996         slope1 = (gdouble)(y2 - y1);
 997         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
 998         slope1_x = x1;
 999         slope1_y = y1;
1000         slope2 = (gdouble)(y3 - y1);
1001         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
1002
1003         for (y = fy1; y < fy2; y++)
1004                 {
1005                 gint xa, xb;
1006
1007                 if (!middle && y > y2)
1008                         {
1009                         slope1 = (gdouble)(y3 - y2);
1010                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
1011                         slope1_x = x2;
1012                         slope1_y = y2;
1013
1014                         middle = TRUE;
1015                         }
1016
1017                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
1018                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
1019
1020                 if (xa > xb)
1021                         {
1022                         t = xa; xa = xb; xb = t;
1023                         }
1024
1025                 xa = CLAMP(xa, fx1, fx2);
1026                 xb = CLAMP(xb, fx1, fx2);
1027
1028                 pp = p_pix + y * prs + xa * p_step;
1029
1030                 while (xa < xb)
1031                         {
1032                         *pp = (r * a + *pp * (256-a)) >> 8;
1033                         pp++;
1034                         *pp = (g * a + *pp * (256-a)) >> 8;
1035                         pp++;
1036                         *pp = (b * a + *pp * (256-a)) >> 8;
1037                         pp++;
1038                         if (has_alpha) pp++;
1039
1040                         xa++;
1041                         }
1042                 }
1043 }
1044
1045 /*
1046  *-----------------------------------------------------------------------------
1047  * pixbuf drawing (line)
1048  *-----------------------------------------------------------------------------
1049  */
1050
1051 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
1052                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
1053                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
1054 {
1055         gboolean flip = FALSE;
1056         gdouble d;
1057
1058         if (x1 > x2)
1059                 {
1060                 gdouble t;
1061
1062                 t = x1; x1 = x2; x2 = t;
1063                 t = y1; y1 = y2; y2 = t;
1064                 flip = TRUE;
1065                 }
1066
1067         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
1068
1069         if (y1 < y2)
1070                 {
1071                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1072                 }
1073         else
1074                 {
1075                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1076                 }
1077
1078         d = x2 - x1;
1079         if (d > 0.0)
1080                 {
1081                 gdouble slope;
1082
1083                 slope = (y2 - y1) / d;
1084                 if (x1 < clip_x)
1085                         {
1086                         y1 = y1 + slope * (clip_x - x1);
1087                         x1 = clip_x;
1088                         }
1089                 if (x2 > clip_x + clip_w)
1090                         {
1091                         y2 = y2 + slope * (clip_x + clip_w - x2);
1092                         x2 = clip_x + clip_w;
1093                         }
1094                 }
1095
1096         if (y1 < y2)
1097                 {
1098                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1099                 }
1100         else
1101                 {
1102                 gdouble t;
1103
1104                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1105
1106                 t = x1; x1 = x2; x2 = t;
1107                 t = y1; y1 = y2; y2 = t;
1108                 flip = !flip;
1109                 }
1110
1111         d = y2 - y1;
1112         if (d > 0.0)
1113                 {
1114                 gdouble slope;
1115
1116                 slope = (x2 - x1) / d;
1117                 if (y1 < clip_y)
1118                         {
1119                         x1 = x1 + slope * (clip_y - y1);
1120                         y1 = clip_y;
1121                         }
1122                 if (y2 > clip_y + clip_h)
1123                         {
1124                         x2 = x2 + slope * (clip_y + clip_h - y2);
1125                         y2 = clip_y + clip_h;
1126                         }
1127                 }
1128
1129         if (flip)
1130                 {
1131                 *rx1 = x2;
1132                 *ry1 = y2;
1133                 *rx2 = x1;
1134                 *ry2 = y1;
1135                 }
1136         else
1137                 {
1138                 *rx1 = x1;
1139                 *ry1 = y1;
1140                 *rx2 = x2;
1141                 *ry2 = y2;
1142                 }
1143
1144         return TRUE;
1145 }
1146
1147 void pixbuf_draw_line(GdkPixbuf *pb,
1148                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1149                       gint x1, gint y1, gint x2, gint y2,
1150                       guint8 r, guint8 g, guint8 b, guint8 a)
1151 {
1152         gboolean has_alpha;
1153         gint pw, ph, prs;
1154         gint rx, ry, rw, rh;
1155         gdouble rx1, ry1, rx2, ry2;
1156         guchar *p_pix;
1157         guchar *pp;
1158         gint p_step;
1159         gdouble slope;
1160         gdouble x, y;
1161         gint px, py;
1162         gint cx1, cy1, cx2, cy2;
1163
1164         if (!pb) return;
1165
1166         pw = gdk_pixbuf_get_width(pb);
1167         ph = gdk_pixbuf_get_height(pb);
1168
1169         if (!util_clip_region(0, 0, pw, ph,
1170                               clip_x, clip_y, clip_w, clip_h,
1171                               &rx, &ry, &rw, &rh)) return;
1172         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
1173                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
1174                             &rx1, &ry1, &rx2, &ry2)) return;
1175
1176         cx1 = rx;
1177         cy1 = ry;
1178         cx2 = rx + rw;
1179         cy2 = ry + rh;
1180
1181         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1182         prs = gdk_pixbuf_get_rowstride(pb);
1183         p_pix = gdk_pixbuf_get_pixels(pb);
1184
1185         p_step = (has_alpha) ? 4 : 3;
1186
1187         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1188                 {
1189                 if (rx1 > rx2)
1190                         {
1191                         gdouble t;
1192                         t = rx1; rx1 = rx2; rx2 = t;
1193                         t = ry1; ry1 = ry2; ry2 = t;
1194                         }
1195
1196                 slope = rx2 - rx1;
1197                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1198                 for (x = rx1; x < rx2; x += 1.0)
1199                         {
1200                         px = (gint)(x + 0.5);
1201                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1202
1203                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1204                                 {
1205                                 pp = p_pix + py * prs + px * p_step;
1206                                 *pp = (r * a + *pp * (256-a)) >> 8;
1207                                 pp++;
1208                                 *pp = (g * a + *pp * (256-a)) >> 8;
1209                                 pp++;
1210                                 *pp = (b * a + *pp * (256-a)) >> 8;
1211                                 }
1212                         }
1213                 }
1214         else
1215                 {
1216                 if (ry1 > ry2)
1217                         {
1218                         gdouble t;
1219                         t = rx1; rx1 = rx2; rx2 = t;
1220                         t = ry1; ry1 = ry2; ry2 = t;
1221                         }
1222
1223                 slope = ry2 - ry1;
1224                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1225                 for (y = ry1; y < ry2; y += 1.0)
1226                         {
1227                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1228                         py = (gint)(y + 0.5);
1229
1230                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1231                                 {
1232                                 pp = p_pix + py * prs + px * p_step;
1233                                 *pp = (r * a + *pp * (256-a)) >> 8;
1234                                 pp++;
1235                                 *pp = (g * a + *pp * (256-a)) >> 8;
1236                                 pp++;
1237                                 *pp = (b * a + *pp * (256-a)) >> 8;
1238                                 }
1239                         }
1240                 }
1241 }
1242
1243 /*
1244  *-----------------------------------------------------------------------------
1245  * pixbuf drawing (fades and shadows)
1246  *-----------------------------------------------------------------------------
1247  */
1248
1249 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1250                                     gint s, gboolean vertical, gint border,
1251                                     gint x1, gint y1, gint x2, gint y2,
1252                                     guint8 r, guint8 g, guint8 b, guint8 a)
1253 {
1254         guchar *pp;
1255         gint p_step;
1256         guint8 n = a;
1257         gint i, j;
1258
1259         p_step = (has_alpha) ? 4 : 3;
1260         for (j = y1; j < y2; j++)
1261                 {
1262                 pp = p_pix + j * prs + x1 * p_step;
1263                 if (!vertical) n = a - a * abs(j - s) / border;
1264                 for (i = x1; i < x2; i++)
1265                         {
1266                         if (vertical) n = a - a * abs(i - s) / border;
1267                         *pp = (r * n + *pp * (256-n)) >> 8;
1268                         pp++;
1269                         *pp = (g * n + *pp * (256-n)) >> 8;
1270                         pp++;
1271                         *pp = (b * n + *pp * (256-n)) >> 8;
1272                         pp++;
1273                         if (has_alpha) pp++;
1274                         }
1275                 }
1276 }
1277
1278 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1279                                     gint sx, gint sy, gint border,
1280                                     gint x1, gint y1, gint x2, gint y2,
1281                                     guint8 r, guint8 g, guint8 b, guint8 a)
1282 {
1283         guchar *pp;
1284         gint p_step;
1285         gint i, j;
1286
1287         p_step = (has_alpha) ? 4 : 3;
1288         for (j = y1; j < y2; j++)
1289                 {
1290                 pp = p_pix + j * prs + x1 * p_step;
1291                 for (i = x1; i < x2; i++)
1292                         {
1293                         guint8 n;
1294                         gint r;
1295
1296                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1297                         n = a - a * r / border;
1298                         *pp = (r * n + *pp * (256-n)) >> 8;
1299                         pp++;
1300                         *pp = (g * n + *pp * (256-n)) >> 8;
1301                         pp++;
1302                         *pp = (b * n + *pp * (256-n)) >> 8;
1303                         pp++;
1304                         if (has_alpha) pp++;
1305                         }
1306                 }
1307 }
1308
1309 void pixbuf_draw_shadow(GdkPixbuf *pb,
1310                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1311                         gint x, gint y, gint w, gint h, gint border,
1312                         guint8 r, guint8 g, guint8 b, guint8 a)
1313 {
1314         gint has_alpha;
1315         gint pw, ph, prs;
1316         gint rx, ry, rw, rh;
1317         gint fx, fy, fw, fh;
1318         guchar *p_pix;
1319
1320         if (!pb) return;
1321
1322         pw = gdk_pixbuf_get_width(pb);
1323         ph = gdk_pixbuf_get_height(pb);
1324
1325         if (!util_clip_region(0, 0, pw, ph,
1326                               clip_x, clip_y, clip_w, clip_h,
1327                               &rx, &ry, &rw, &rh)) return;
1328
1329         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1330         prs = gdk_pixbuf_get_rowstride(pb);
1331         p_pix = gdk_pixbuf_get_pixels(pb);
1332
1333         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1334                              rx, ry, rw, rh,
1335                              &fx, &fy, &fw, &fh))
1336                 {
1337                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1338                 }
1339
1340         if (border < 1) return;
1341
1342         if (util_clip_region(x, y + border, border, h - border * 2,
1343                              rx, ry, rw, rh,
1344                              &fx, &fy, &fw, &fh))
1345                 {
1346                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1347                                         x + border, TRUE, border,
1348                                         fx, fy, fx + fw, fy + fh,
1349                                         r, g, b, a);
1350                 }
1351         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1352                              rx, ry, rw, rh,
1353                              &fx, &fy, &fw, &fh))
1354                 {
1355                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1356                                         x + w - border, TRUE, border,
1357                                         fx, fy, fx + fw, fy + fh,
1358                                         r, g, b, a);
1359                 }
1360         if (util_clip_region(x + border, y, w - border * 2, border,
1361                              rx, ry, rw, rh,
1362                              &fx, &fy, &fw, &fh))
1363                 {
1364                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1365                                         y + border, FALSE, border,
1366                                         fx, fy, fx + fw, fy + fh,
1367                                         r, g, b, a);
1368                 }
1369         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1370                              rx, ry, rw, rh,
1371                              &fx, &fy, &fw, &fh))
1372                 {
1373                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1374                                         y + h - border, FALSE, border,
1375                                         fx, fy, fx + fw, fy + fh,
1376                                         r, g, b, a);
1377                 }
1378         if (util_clip_region(x, y, border, border,
1379                              rx, ry, rw, rh,
1380                              &fx, &fy, &fw, &fh))
1381                 {
1382                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1383                                         x + border, y + border, border,
1384                                         fx, fy, fx + fw, fy + fh,
1385                                         r, g, b, a);
1386                 }
1387         if (util_clip_region(x + w - border, y, border, border,
1388                              rx, ry, rw, rh,
1389                              &fx, &fy, &fw, &fh))
1390                 {
1391                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1392                                         x + w - border, y + border, border,
1393                                         fx, fy, fx + fw, fy + fh,
1394                                         r, g, b, a);
1395                 }
1396         if (util_clip_region(x, y + h - border, border, border,
1397                              rx, ry, rw, rh,
1398                              &fx, &fy, &fw, &fh))
1399                 {
1400                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1401                                         x + border, y + h - border, border,
1402                                         fx, fy, fx + fw, fy + fh,
1403                                         r, g, b, a);
1404                 }
1405         if (util_clip_region(x + w - border, y + h - border, border, border,
1406                              rx, ry, rw, rh,
1407                              &fx, &fy, &fw, &fh))
1408                 {
1409                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1410                                         x + w - border, y + h - border, border,
1411                                         fx, fy, fx + fw, fy + fh,
1412                                         r, g, b, a);
1413                 }
1414 }
1415
1416
1417 /*
1418  *-----------------------------------------------------------------------------
1419  * pixbuf color alterations
1420  *-----------------------------------------------------------------------------
1421  */
1422
1423 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1424                             gint x, gint y, gint w, gint h)
1425 {
1426         gboolean has_alpha;
1427         gint pw, ph, prs;
1428         guchar *p_pix;
1429         guchar *pp;
1430         gint i, j;
1431
1432         if (!pb) return;
1433
1434         pw = gdk_pixbuf_get_width(pb);
1435         ph = gdk_pixbuf_get_height(pb);
1436
1437         if (x < 0 || x + w > pw) return;
1438         if (y < 0 || y + h > ph) return;
1439
1440         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1441         prs = gdk_pixbuf_get_rowstride(pb);
1442         p_pix = gdk_pixbuf_get_pixels(pb);
1443
1444         for (i = 0; i < h; i++)
1445                 {
1446                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1447                 for (j = 0; j < w; j++)
1448                         {
1449                         guint8 grey;
1450
1451                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1452                         *pp = grey;
1453                         pp++;
1454                         *pp = grey;
1455                         pp++;
1456                         *pp = grey;
1457                         pp++;
1458                         if (has_alpha) pp++;
1459                         }
1460                 }
1461 }
1462 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */