src/pixbuf_util.c

   1 /*
   2  * Geeqie
   3  * (C) 2004 John Ellis
   4  * Copyright (C) 2008 - 2009 The Geeqie Team
   5  *
   6  * Author: John Ellis
   7  *
   8  * This software is released under the GNU General Public License (GNU GPL).
   9  * Please read the included file COPYING for more information.
  10  * This software comes with no warranty of any kind, use at your own risk!
  11  */
  12
  13
  14 #include "main.h"
  15 #include "pixbuf_util.h"
  16 #include "exif.h"
  17 #include "ui_fileops.h"
  18
  19 #include "icons/icons_inline.h"
  20
  21 #include <math.h>
  22
  23
  24 /*
  25  *-----------------------------------------------------------------------------
  26  * png save
  27  *-----------------------------------------------------------------------------
  28  */
  29
  30 gboolean pixbuf_to_file_as_png(GdkPixbuf *pixbuf, const gchar *filename)
  31 {
  32         GError *error = NULL;
  33         gboolean ret;
  34
  35         if (!pixbuf || !filename) return FALSE;
  36
  37         ret = gdk_pixbuf_save(pixbuf, filename, "png", &error,
  38                               "tEXt::Software", GQ_APPNAME " " VERSION, NULL);
  39
  40         if (error)
  41                 {
  42                 log_printf("Error saving png file: %s\n", error->message);
  43                 g_error_free(error);
  44                 }
  45
  46         return ret;
  47 }
  48
  49 /*
  50  *-----------------------------------------------------------------------------
  51  * jpeg save
  52  *-----------------------------------------------------------------------------
  53  */
  54
  55 gboolean pixbuf_to_file_as_jpg(GdkPixbuf *pixbuf, const gchar *filename, gint quality)
  56 {
  57         GError *error = NULL;
  58         gchar *qbuf;
  59         gboolean ret;
  60
  61         if (!pixbuf || !filename) return FALSE;
  62
  63         if (quality == -1) quality = 75;
  64         if (quality < 1 || quality > 100)
  65                 {
  66                 log_printf("Jpeg not saved, invalid quality %d\n", quality);
  67                 return FALSE;
  68                 }
  69
  70         qbuf = g_strdup_printf("%d", quality);
  71         ret = gdk_pixbuf_save(pixbuf, filename, "jpeg", &error, "quality", qbuf, NULL);
  72         g_free(qbuf);
  73
  74         if (error)
  75                 {
  76                 log_printf("Error saving jpeg to %s\n%s\n", filename, error->message);
  77                 g_error_free(error);
  78                 }
  79
  80         return ret;
  81 }
  82
  83 /*
  84  *-----------------------------------------------------------------------------
  85  * pixbuf from inline
  86  *-----------------------------------------------------------------------------
  87  */
  88
  89 typedef struct _PixbufInline PixbufInline;
  90 struct _PixbufInline
  91 {
  92         const gchar *key;
  93         const guint8 *data;
  94 };
  95
  96 static PixbufInline inline_pixbuf_data[] = {
  97         { PIXBUF_INLINE_FOLDER_CLOSED,  folder_closed },
  98         { PIXBUF_INLINE_FOLDER_LOCKED,  folder_locked },
  99         { PIXBUF_INLINE_FOLDER_OPEN,    folder_open },
 100         { PIXBUF_INLINE_FOLDER_UP,      folder_up },
 101         { PIXBUF_INLINE_SCROLLER,       icon_scroller },
 102         { PIXBUF_INLINE_BROKEN,         icon_broken },
 103         { PIXBUF_INLINE_ICON,           gqview_icon },
 104         { PIXBUF_INLINE_LOGO,           geeqie_logo },
 105         { PIXBUF_INLINE_ICON_FLOAT,     icon_float },
 106         { PIXBUF_INLINE_ICON_THUMB,     icon_thumb },
 107         { PIXBUF_INLINE_ICON_BOOK,      icon_book },
 108         { PIXBUF_INLINE_ICON_CONFIG,    icon_config },
 109         { PIXBUF_INLINE_ICON_TOOLS,     icon_tools },
 110         { PIXBUF_INLINE_ICON_VIEW,      icon_view },
 111         { NULL, NULL }
 112 };
 113
 114 GdkPixbuf *pixbuf_inline(const gchar *key)
 115 {
 116         gint i;
 117
 118         if (!key) return NULL;
 119
 120         i = 0;
 121         while (inline_pixbuf_data[i].key)
 122                 {
 123                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 124                         {
 125                         return gdk_pixbuf_new_from_inline(-1, inline_pixbuf_data[i].data, FALSE, NULL);
 126                         }
 127                 i++;
 128                 }
 129
 130         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 131
 132         return NULL;
 133 }
 134
 135 static void register_stock_icon(const gchar *key, GdkPixbuf *pixbuf)
 136 {
 137         static GtkIconFactory *icon_factory = NULL;
 138         GtkIconSet *icon_set;
 139
 140         if (!icon_factory)
 141                 {
 142                 icon_factory = gtk_icon_factory_new();
 143                 gtk_icon_factory_add_default(icon_factory);
 144                 }
 145
 146         icon_set = gtk_icon_set_new_from_pixbuf(pixbuf);
 147         gtk_icon_factory_add(icon_factory, key, icon_set);
 148 }
 149
 150
 151 void pixbuf_inline_register_stock_icons(void)
 152 {
 153         gint i;
 154
 155         i = 0;
 156         while (inline_pixbuf_data[i].key)
 157                 {
 158                 register_stock_icon(inline_pixbuf_data[i].key, pixbuf_inline(inline_pixbuf_data[i].key));
 159                 i++;
 160                 }
 161 }
 162
 163 gboolean register_theme_icon_as_stock(const gchar *key, const gchar *icon)
 164 {
 165         GtkIconTheme *icon_theme;
 166         GdkPixbuf *pixbuf;
 167         GError *error = NULL;
 168
 169         icon_theme = gtk_icon_theme_get_default();
 170
 171         if (gtk_icon_theme_has_icon(icon_theme, key)) return FALSE;
 172
 173         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 174                            icon, /* icon name */
 175                            64, /* size */
 176                            0,  /* flags */
 177                            &error);
 178         if (!pixbuf)
 179                 {
 180                 if (error)
 181                         {
 182                         DEBUG_1("Couldn't load icon %s: %s", icon, error->message);
 183                         g_error_free(error);
 184                         error = NULL;
 185                         }
 186
 187                 if (strchr(icon, '.'))
 188                         {
 189                         /* try again without extension */
 190                         gchar *icon2 = remove_extension_from_path(icon);
 191                         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 192                                            icon2, /* icon name */
 193                                            64, /* size */
 194                                            0,  /* flags */
 195                                            &error);
 196                         if (error)
 197                                 {
 198                                 DEBUG_1("Couldn't load icon %s: %s", icon2, error->message);
 199                                 g_error_free(error);
 200                                 }
 201                         g_free(icon2);
 202                         }
 203                 }
 204
 205         if (!pixbuf) return FALSE;
 206
 207         register_stock_icon(key, pixbuf);
 208         return TRUE;
 209 }
 210
 211 gboolean pixbuf_scale_aspect(gint req_w, gint req_h,
 212                              gint old_w, gint old_h,
 213                              gint *new_w, gint *new_h)
 214 {
 215         if (((gdouble)req_w / old_w) < ((gdouble)req_h / old_h))
 216                 {
 217                 *new_w = req_w;
 218                 *new_h = (gdouble)*new_w / old_w * old_h;
 219                 if (*new_h < 1) *new_h = 1;
 220                 }
 221         else
 222                 {
 223                 *new_h = req_h;
 224                 *new_w = (gdouble)*new_h / old_h * old_w;
 225                 if (*new_w < 1) *new_w = 1;
 226                 }
 227
 228         return (*new_w != old_w || *new_h != old_h);
 229 }
 230
 231 GdkPixbuf *pixbuf_fallback(FileData *fd, gint requested_width, gint requested_height)
 232 {
 233         GdkPixbuf *pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN); /* FIXME use different images according to FORMAT_CLASS */
 234
 235         if (requested_width && requested_height)
 236                 {
 237                 gint w = gdk_pixbuf_get_width(pixbuf);
 238                 gint h = gdk_pixbuf_get_height(pixbuf);
 239
 240                 if (w > requested_width || h > requested_height)
 241                         {
 242                         gint nw, nh;
 243
 244                         if (pixbuf_scale_aspect(requested_width, requested_height,
 245                                                           w, h, &nw, &nh))
 246                                 {
 247                                 GdkPixbuf *tmp;
 248
 249                                 tmp = pixbuf;
 250                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 251                                 g_object_unref(G_OBJECT(tmp));
 252                                 }
 253                         }
 254                 }
 255         return pixbuf;
 256 }
 257
 258
 259 /*
 260  *-----------------------------------------------------------------------------
 261  * misc utils
 262  *-----------------------------------------------------------------------------
 263  */
 264
 265 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 266                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 267                           gint *rx, gint *ry, gint *rw, gint *rh)
 268 {
 269         if (clip_x + clip_w <= x ||
 270             clip_x >= x + w ||
 271             clip_y + clip_h <= y ||
 272             clip_y >= y + h)
 273                 {
 274                 return FALSE;
 275                 }
 276
 277         *rx = MAX(x, clip_x);
 278         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 279
 280         *ry = MAX(y, clip_y);
 281         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 282
 283         return TRUE;
 284 }
 285
 286 /*
 287  *-----------------------------------------------------------------------------
 288  * pixbuf rotation
 289  *-----------------------------------------------------------------------------
 290  */
 291
 292 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 293                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 294                                      gint bytes_per_pixel, gboolean counter_clockwise)
 295 {
 296         gint i, j;
 297         guchar *sp;
 298         guchar *dp;
 299
 300         for (i = 0; i < h; i++)
 301                 {
 302                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 303                 for (j = 0; j < w; j++)
 304                         {
 305                         if (counter_clockwise)
 306                                 {
 307                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 308                                 }
 309                         else
 310                                 {
 311                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 312                                 }
 313                         *(dp++) = *(sp++);      /* r */
 314                         *(dp++) = *(sp++);      /* g */
 315                         *(dp++) = *(sp++);      /* b */
 316                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 317                         }
 318                 }
 319
 320 }
 321
 322 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 323                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 324 {
 325         gint i;
 326         guchar *sp;
 327         guchar *dp;
 328
 329         for (i = 0; i < h; i++)
 330                 {
 331                 sp = src + (i * src_row_stride);
 332                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 333                 memcpy(dp, sp, w * bytes_per_pixel);
 334                 }
 335 }
 336
 337 #define ROTATE_BUFFER_WIDTH 48
 338 #define ROTATE_BUFFER_HEIGHT 48
 339
 340 /*
 341  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 342  *
 343  */
 344 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 345 {
 346         GdkPixbuf *dest;
 347         gboolean has_alpha;
 348         gint sw, sh, srs;
 349         gint dw, dh, drs;
 350         guchar *s_pix;
 351         guchar *d_pix;
 352 #if 0
 353         guchar *sp;
 354         guchar *dp;
 355 #endif
 356         gint i, j;
 357         gint a;
 358         GdkPixbuf *buffer;
 359         guchar *b_pix;
 360         gint brs;
 361         gint w, h;
 362
 363         if (!src) return NULL;
 364
 365         sw = gdk_pixbuf_get_width(src);
 366         sh = gdk_pixbuf_get_height(src);
 367         has_alpha = gdk_pixbuf_get_has_alpha(src);
 368         srs = gdk_pixbuf_get_rowstride(src);
 369         s_pix = gdk_pixbuf_get_pixels(src);
 370
 371         dw = sh;
 372         dh = sw;
 373         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 374         drs = gdk_pixbuf_get_rowstride(dest);
 375         d_pix = gdk_pixbuf_get_pixels(dest);
 376
 377         a = (has_alpha ? 4 : 3);
 378
 379         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 380                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 381         b_pix = gdk_pixbuf_get_pixels(buffer);
 382         brs = gdk_pixbuf_get_rowstride(buffer);
 383
 384         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 385                 {
 386                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 387                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 388                         {
 389                         gint x, y;
 390
 391                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 392                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 393                                                  b_pix, brs, h, w,
 394                                                  a, counter_clockwise);
 395
 396                         if (counter_clockwise)
 397                                 {
 398                                 x = i;
 399                                 y = sw - h - j;
 400                                 }
 401                         else
 402                                 {
 403                                 x = sh - w - i;
 404                                 y = j;
 405                                 }
 406                         pixbuf_copy_block(b_pix, brs, w, h,
 407                                           d_pix, drs, x, y, a);
 408                         }
 409                 }
 410
 411         g_object_unref(buffer);
 412
 413 #if 0
 414         /* this is the simple version of rotation (roughly 2-4x slower) */
 415
 416         for (i = 0; i < sh; i++)
 417                 {
 418                 sp = s_pix + (i * srs);
 419                 for (j = 0; j < sw; j++)
 420                         {
 421                         if (counter_clockwise)
 422                                 {
 423                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 424                                 }
 425                         else
 426                                 {
 427                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 428                                 }
 429
 430                         *(dp++) = *(sp++);      /* r */
 431                         *(dp++) = *(sp++);      /* g */
 432                         *(dp++) = *(sp++);      /* b */
 433                         if (has_alpha) *(dp) = *(sp++); /* a */
 434                         }
 435                 }
 436 #endif
 437
 438         return dest;
 439 }
 440
 441 /*
 442  * Returns a copy of pixbuf mirrored and or flipped.
 443  * TO do a 180 degree rotations set both mirror and flipped TRUE
 444  * if mirror and flip are FALSE, result is a simple copy.
 445  */
 446 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 447 {
 448         GdkPixbuf *dest;
 449         gboolean has_alpha;
 450         gint w, h, srs;
 451         gint drs;
 452         guchar *s_pix;
 453         guchar *d_pix;
 454         guchar *sp;
 455         guchar *dp;
 456         gint i, j;
 457         gint a;
 458
 459         if (!src) return NULL;
 460
 461         w = gdk_pixbuf_get_width(src);
 462         h = gdk_pixbuf_get_height(src);
 463         has_alpha = gdk_pixbuf_get_has_alpha(src);
 464         srs = gdk_pixbuf_get_rowstride(src);
 465         s_pix = gdk_pixbuf_get_pixels(src);
 466
 467         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 468         drs = gdk_pixbuf_get_rowstride(dest);
 469         d_pix = gdk_pixbuf_get_pixels(dest);
 470
 471         a = has_alpha ? 4 : 3;
 472
 473         for (i = 0; i < h; i++)
 474                 {
 475                 sp = s_pix + (i * srs);
 476                 if (flip)
 477                         {
 478                         dp = d_pix + ((h - i - 1) * drs);
 479                         }
 480                 else
 481                         {
 482                         dp = d_pix + (i * drs);
 483                         }
 484                 if (mirror)
 485                         {
 486                         dp += (w - 1) * a;
 487                         for (j = 0; j < w; j++)
 488                                 {
 489                                 *(dp++) = *(sp++);      /* r */
 490                                 *(dp++) = *(sp++);      /* g */
 491                                 *(dp++) = *(sp++);      /* b */
 492                                 if (has_alpha) *(dp) = *(sp++); /* a */
 493                                 dp -= (a + 3);
 494                                 }
 495                         }
 496                 else
 497                         {
 498                         for (j = 0; j < w; j++)
 499                                 {
 500                                 *(dp++) = *(sp++);      /* r */
 501                                 *(dp++) = *(sp++);      /* g */
 502                                 *(dp++) = *(sp++);      /* b */
 503                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 504                                 }
 505                         }
 506                 }
 507
 508         return dest;
 509 }
 510
 511 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 512 {
 513         GdkPixbuf *dest;
 514         GdkPixbuf *tmp = NULL;
 515
 516         switch (orientation)
 517                 {
 518                 case EXIF_ORIENTATION_TOP_LEFT:
 519                         dest = gdk_pixbuf_copy(pixbuf);
 520                         break;
 521                 case EXIF_ORIENTATION_TOP_RIGHT:
 522                         /* mirrored */
 523                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 524                         break;
 525                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 526                         /* upside down */
 527                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 528                         break;
 529                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 530                         /* flipped */
 531                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 532                         break;
 533                 case EXIF_ORIENTATION_LEFT_TOP:
 534                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 535                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 536                         break;
 537                 case EXIF_ORIENTATION_RIGHT_TOP:
 538                         /* rotated -90 (270) */
 539                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 540                         break;
 541                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 542                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 543                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 544                         break;
 545                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 546                         /* rotated 90 */
 547                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 548                         break;
 549                 default:
 550                         dest = gdk_pixbuf_copy(pixbuf);
 551                         break;
 552                 }
 553         if (tmp) g_object_unref(tmp);
 554         return dest;
 555
 556 }
 557
 558
 559 /*
 560  *-----------------------------------------------------------------------------
 561  * pixbuf drawing (rectangles)
 562  *-----------------------------------------------------------------------------
 563  */
 564
 565 /*
 566  * Fills region of pixbuf at x,y over w,h
 567  * with colors red (r), green (g), blue (b)
 568  * applying alpha (a), use a=255 for solid.
 569  */
 570 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 571                            gint x, gint y, gint w, gint h,
 572                            gint r, gint g, gint b, gint a)
 573 {
 574         gboolean has_alpha;
 575         gint pw, ph, prs;
 576         guchar *p_pix;
 577         guchar *pp;
 578         gint i, j;
 579
 580         if (!pb) return;
 581
 582         pw = gdk_pixbuf_get_width(pb);
 583         ph = gdk_pixbuf_get_height(pb);
 584
 585         if (x < 0 || x + w > pw) return;
 586         if (y < 0 || y + h > ph) return;
 587
 588         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 589         prs = gdk_pixbuf_get_rowstride(pb);
 590         p_pix = gdk_pixbuf_get_pixels(pb);
 591
 592         for (i = 0; i < h; i++)
 593                 {
 594                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 595                 for (j = 0; j < w; j++)
 596                         {
 597                         *pp = (r * a + *pp * (256-a)) >> 8;
 598                         pp++;
 599                         *pp = (g * a + *pp * (256-a)) >> 8;
 600                         pp++;
 601                         *pp = (b * a + *pp * (256-a)) >> 8;
 602                         pp++;
 603                         if (has_alpha) pp++;
 604                         }
 605                 }
 606 }
 607
 608 void pixbuf_draw_rect(GdkPixbuf *pb,
 609                       gint x, gint y, gint w, gint h,
 610                       gint r, gint g, gint b, gint a,
 611                       gint left, gint right, gint top, gint bottom)
 612 {
 613         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 614                               r, g, b ,a);
 615         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 616                               r, g, b ,a);
 617         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 618                               r, g, b ,a);
 619         pixbuf_draw_rect_fill(pb, x, y, left, h,
 620                               r, g, b ,a);
 621 }
 622
 623 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 624                           gint x, gint y, gint w, gint h,
 625                           gint r, gint g, gint b, gint a)
 626 {
 627         gboolean has_alpha;
 628         gint pw, ph, prs;
 629         guchar *p_pix;
 630         guchar *pp;
 631         gint i, j;
 632
 633         if (!pb) return;
 634
 635         pw = gdk_pixbuf_get_width(pb);
 636         ph = gdk_pixbuf_get_height(pb);
 637
 638         if (x < 0 || x + w > pw) return;
 639         if (y < 0 || y + h > ph) return;
 640
 641         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 642         prs = gdk_pixbuf_get_rowstride(pb);
 643         p_pix = gdk_pixbuf_get_pixels(pb);
 644
 645         for (i = 0; i < h; i++)
 646                 {
 647                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 648                 for (j = 0; j < w; j++)
 649                         {
 650                         *pp = r; pp++;
 651                         *pp = g; pp++;
 652                         *pp = b; pp++;
 653                         if (has_alpha) { *pp = a; pp++; }
 654                         }
 655                 }
 656 }
 657
 658 void pixbuf_set_rect(GdkPixbuf *pb,
 659                      gint x, gint y, gint w, gint h,
 660                      gint r, gint g, gint b, gint a,
 661                      gint left, gint right, gint top, gint bottom)
 662 {
 663         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 664                              r, g, b ,a);
 665         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 666                              r, g, b ,a);
 667         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 668                              r, g, b ,a);
 669         pixbuf_set_rect_fill(pb, x, y, left, h,
 670                              r, g, b ,a);
 671 }
 672
 673 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 674 {
 675         guchar *buf;
 676         gboolean has_alpha;
 677         gint rowstride;
 678         guchar *p;
 679
 680         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 681             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 682
 683         buf = gdk_pixbuf_get_pixels(pb);
 684         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 685         rowstride = gdk_pixbuf_get_rowstride(pb);
 686
 687         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 688         *p = r; p++;
 689         *p = g; p++;
 690         *p = b; p++;
 691         if (has_alpha) *p = a;
 692 }
 693
 694
 695 /*
 696  *-----------------------------------------------------------------------------
 697  * pixbuf text rendering
 698  *-----------------------------------------------------------------------------
 699  */
 700
 701 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 702                              GdkPixbuf *dest, gint dx, gint dy,
 703                              gint w, gint h,
 704                              guint8 r, guint8 g, guint8 b, guint8 a)
 705 {
 706         gint sw, sh, srs;
 707         gboolean s_alpha;
 708         gint s_step;
 709         guchar *s_pix;
 710         gint dw, dh, drs;
 711         gboolean d_alpha;
 712         gint d_step;
 713         guchar *d_pix;
 714
 715         guchar *sp;
 716         guchar *dp;
 717         gint i, j;
 718
 719         if (!src || !dest) return;
 720
 721         sw = gdk_pixbuf_get_width(src);
 722         sh = gdk_pixbuf_get_height(src);
 723
 724         if (sx < 0 || sx + w > sw) return;
 725         if (sy < 0 || sy + h > sh) return;
 726
 727         dw = gdk_pixbuf_get_width(dest);
 728         dh = gdk_pixbuf_get_height(dest);
 729
 730         if (dx < 0 || dx + w > dw) return;
 731         if (dy < 0 || dy + h > dh) return;
 732
 733         s_alpha = gdk_pixbuf_get_has_alpha(src);
 734         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 735         srs = gdk_pixbuf_get_rowstride(src);
 736         drs = gdk_pixbuf_get_rowstride(dest);
 737         s_pix = gdk_pixbuf_get_pixels(src);
 738         d_pix = gdk_pixbuf_get_pixels(dest);
 739
 740         s_step = (s_alpha) ? 4 : 3;
 741         d_step = (d_alpha) ? 4 : 3;
 742
 743         for (i = 0; i < h; i++)
 744                 {
 745                 sp = s_pix + (sy + i) * srs + sx * s_step;
 746                 dp = d_pix + (dy + i) * drs + dx * d_step;
 747                 for (j = 0; j < w; j++)
 748                         {
 749                         if (*sp)
 750                                 {
 751                                 guint8 asub;
 752
 753                                 asub = a * sp[0] / 255;
 754                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 755                                 dp++;
 756                                 asub = a * sp[1] / 255;
 757                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 758                                 dp++;
 759                                 asub = a * sp[2] / 255;
 760                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 761                                 dp++;
 762
 763                                 if (d_alpha)
 764                                         {
 765                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 766                                         dp++;
 767                                         }
 768                                 }
 769                         else
 770                                 {
 771                                 dp += d_step;
 772                                 }
 773
 774                         sp += s_step;
 775                         }
 776                 }
 777 }
 778
 779 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 780                         gint x, gint y,
 781                         guint8 r, guint8 g, guint8 b, guint8 a)
 782 {
 783         GdkPixmap *pixmap;
 784         GdkPixbuf *buffer;
 785         gint w, h;
 786         GdkGC *gc;
 787         gint sx, sy;
 788         gint dw, dh;
 789
 790         if (!widget || !widget->window) return;
 791
 792         pango_layout_get_pixel_size(layout, &w, &h);
 793         if (w < 1 || h < 1) return;
 794
 795         pixmap = gdk_pixmap_new(widget->window, w, h, -1);
 796
 797         gc = gdk_gc_new(widget->window);
 798         gdk_gc_copy(gc, widget->style->black_gc);
 799         gdk_draw_rectangle(pixmap, gc, TRUE, 0, 0, w, h);
 800         gdk_gc_copy(gc, widget->style->white_gc);
 801         gdk_draw_layout(pixmap, gc, 0, 0, layout);
 802         g_object_unref(gc);
 803
 804         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, w, h);
 805         gdk_pixbuf_get_from_drawable(buffer, pixmap,
 806                                      gdk_drawable_get_colormap(widget->window),
 807                                      0, 0, 0, 0, w, h);
 808         g_object_unref(pixmap);
 809
 810         sx = 0;
 811         sy = 0;
 812         dw = gdk_pixbuf_get_width(pixbuf);
 813         dh = gdk_pixbuf_get_height(pixbuf);
 814
 815         if (x < 0)
 816                 {
 817                 w += x;
 818                 sx = -x;
 819                 x = 0;
 820                 }
 821
 822         if (y < 0)
 823                 {
 824                 h += y;
 825                 sy = -y;
 826                 y = 0;
 827                 }
 828
 829         if (x + w > dw) w = dw - x;
 830         if (y + h > dh) h = dh - y;
 831
 832         pixbuf_copy_font(buffer, sx, sy,
 833                          pixbuf, x, y, w, h,
 834                          r, g, b, a);
 835
 836         g_object_unref(buffer);
 837 }
 838
 839 /*
 840  *-----------------------------------------------------------------------------
 841  * pixbuf drawing (triangle)
 842  *-----------------------------------------------------------------------------
 843  */
 844
 845 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 846                         gint *rx, gint *ry, gint *rw, gint *rh)
 847 {
 848         gint tx, ty, tw, th;
 849
 850         tx = MIN(x1, x2);
 851         tx = MIN(tx, x3);
 852         ty = MIN(y1, y2);
 853         ty = MIN(ty, y3);
 854         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 855         tw = MAX(tw, abs(x3 - x1));
 856         th = MAX(abs(y1 - y2), abs(y2 - y3));
 857         th = MAX(th, abs(y3 - y1));
 858
 859         *rx = tx;
 860         *ry = ty;
 861         *rw = tw;
 862         *rh = th;
 863 }
 864
 865 void pixbuf_draw_triangle(GdkPixbuf *pb,
 866                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 867                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 868                           guint8 r, guint8 g, guint8 b, guint8 a)
 869 {
 870         gboolean has_alpha;
 871         gint pw, ph, prs;
 872         gint rx, ry, rw, rh;
 873         gint tx, ty, tw, th;
 874         gint fx1, fy1;
 875         gint fx2, fy2;
 876         gint fw, fh;
 877         guchar *p_pix;
 878         guchar *pp;
 879         gint p_step;
 880         gdouble slope1, slope2;
 881         gint slope1_x, slope1_y;
 882         gint y;
 883         gint t;
 884         gboolean middle = FALSE;
 885
 886         if (!pb) return;
 887
 888         pw = gdk_pixbuf_get_width(pb);
 889         ph = gdk_pixbuf_get_height(pb);
 890
 891         if (!util_clip_region(0, 0, pw, ph,
 892                               clip_x, clip_y, clip_w, clip_h,
 893                               &rx, &ry, &rw, &rh)) return;
 894
 895         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 896                            &tx, &ty, &tw, &th);
 897
 898         if (!util_clip_region(rx, ry, rw, rh,
 899                               tx, ty, tw, th,
 900                               &fx1, &fy1, &fw, &fh)) return;
 901         fx2 = fx1 + fw;
 902         fy2 = fy1 + fh;
 903
 904         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 905         prs = gdk_pixbuf_get_rowstride(pb);
 906         p_pix = gdk_pixbuf_get_pixels(pb);
 907
 908         p_step = (has_alpha) ? 4 : 3;
 909
 910         if (y1 > y2)
 911                 {
 912                 t = x1; x1 = x2; x2 = t;
 913                 t = y1; y1 = y2; y2 = t;
 914                 }
 915         if (y2 > y3)
 916                 {
 917                 t = x2; x2 = x3; x3 = t;
 918                 t = y2; y2 = y3; y3 = t;
 919                 }
 920         if (y1 > y2)
 921                 {
 922                 t = x1; x1 = x2; x2 = t;
 923                 t = y1; y1 = y2; y2 = t;
 924                 }
 925
 926         slope1 = (gdouble)(y2 - y1);
 927         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
 928         slope1_x = x1;
 929         slope1_y = y1;
 930         slope2 = (gdouble)(y3 - y1);
 931         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
 932
 933         for (y = fy1; y < fy2; y++)
 934                 {
 935                 gint xa, xb;
 936
 937                 if (!middle && y > y2)
 938                         {
 939                         slope1 = (gdouble)(y3 - y2);
 940                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
 941                         slope1_x = x2;
 942                         slope1_y = y2;
 943
 944                         middle = TRUE;
 945                         }
 946
 947                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
 948                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
 949
 950                 if (xa > xb)
 951                         {
 952                         t = xa; xa = xb; xb = t;
 953                         }
 954
 955                 xa = CLAMP(xa, fx1, fx2);
 956                 xb = CLAMP(xb, fx1, fx2);
 957
 958                 pp = p_pix + y * prs + xa * p_step;
 959
 960                 while (xa < xb)
 961                         {
 962                         *pp = (r * a + *pp * (256-a)) >> 8;
 963                         pp++;
 964                         *pp = (g * a + *pp * (256-a)) >> 8;
 965                         pp++;
 966                         *pp = (b * a + *pp * (256-a)) >> 8;
 967                         pp++;
 968                         if (has_alpha) pp++;
 969
 970                         xa++;
 971                         }
 972                 }
 973 }
 974
 975 /*
 976  *-----------------------------------------------------------------------------
 977  * pixbuf drawing (line)
 978  *-----------------------------------------------------------------------------
 979  */
 980
 981 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
 982                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
 983                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
 984 {
 985         gboolean flip = FALSE;
 986         gdouble d;
 987
 988         if (x1 > x2)
 989                 {
 990                 gdouble t;
 991
 992                 t = x1; x1 = x2; x2 = t;
 993                 t = y1; y1 = y2; y2 = t;
 994                 flip = TRUE;
 995                 }
 996
 997         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
 998
 999         if (y1 < y2)
1000                 {
1001                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1002                 }
1003         else
1004                 {
1005                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1006                 }
1007
1008 #if 0
1009         if (x1 >= clip_x && x2 <= clip_x + clip_w)
1010                 {
1011                 if (y1 < y2)
1012                         {
1013                         if (y1 >= clip_y && y2 <= clip_y + clip_h) return TRUE;
1014                         }
1015                 else
1016                         {
1017                         if (y2 >= clip_y && y1 <= clip_y + clip_h) return TRUE;
1018                         }
1019                 }
1020 #endif
1021
1022         d = x2 - x1;
1023         if (d > 0.0)
1024                 {
1025                 gdouble slope;
1026
1027                 slope = (y2 - y1) / d;
1028                 if (x1 < clip_x)
1029                         {
1030                         y1 = y1 + slope * (clip_x - x1);
1031                         x1 = clip_x;
1032                         }
1033                 if (x2 > clip_x + clip_w)
1034                         {
1035                         y2 = y2 + slope * (clip_x + clip_w - x2);
1036                         x2 = clip_x + clip_w;
1037                         }
1038                 }
1039
1040         if (y1 < y2)
1041                 {
1042                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1043                 }
1044         else
1045                 {
1046                 gdouble t;
1047
1048                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1049
1050                 t = x1; x1 = x2; x2 = t;
1051                 t = y1; y1 = y2; y2 = t;
1052                 flip = !flip;
1053                 }
1054
1055         d = y2 - y1;
1056         if (d > 0.0)
1057                 {
1058                 gdouble slope;
1059
1060                 slope = (x2 - x1) / d;
1061                 if (y1 < clip_y)
1062                         {
1063                         x1 = x1 + slope * (clip_y - y1);
1064                         y1 = clip_y;
1065                         }
1066                 if (y2 > clip_y + clip_h)
1067                         {
1068                         x2 = x2 + slope * (clip_y + clip_h - y2);
1069                         y2 = clip_y + clip_h;
1070                         }
1071                 }
1072
1073         if (flip)
1074                 {
1075                 *rx1 = x2;
1076                 *ry1 = y2;
1077                 *rx2 = x1;
1078                 *ry2 = y1;
1079                 }
1080         else
1081                 {
1082                 *rx1 = x1;
1083                 *ry1 = y1;
1084                 *rx2 = x2;
1085                 *ry2 = y2;
1086                 }
1087
1088         return TRUE;
1089 }
1090
1091 void pixbuf_draw_line(GdkPixbuf *pb,
1092                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1093                       gint x1, gint y1, gint x2, gint y2,
1094                       guint8 r, guint8 g, guint8 b, guint8 a)
1095 {
1096         gboolean has_alpha;
1097         gint pw, ph, prs;
1098         gint rx, ry, rw, rh;
1099         gdouble rx1, ry1, rx2, ry2;
1100         guchar *p_pix;
1101         guchar *pp;
1102         gint p_step;
1103         gdouble slope;
1104         gdouble x, y;
1105         gint px, py;
1106         gint cx1, cy1, cx2, cy2;
1107
1108         if (!pb) return;
1109
1110         pw = gdk_pixbuf_get_width(pb);
1111         ph = gdk_pixbuf_get_height(pb);
1112
1113         if (!util_clip_region(0, 0, pw, ph,
1114                               clip_x, clip_y, clip_w, clip_h,
1115                               &rx, &ry, &rw, &rh)) return;
1116         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
1117                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
1118                             &rx1, &ry1, &rx2, &ry2)) return;
1119
1120         cx1 = rx;
1121         cy1 = ry;
1122         cx2 = rx + rw;
1123         cy2 = ry + rh;
1124
1125         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1126         prs = gdk_pixbuf_get_rowstride(pb);
1127         p_pix = gdk_pixbuf_get_pixels(pb);
1128
1129         p_step = (has_alpha) ? 4 : 3;
1130
1131         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1132                 {
1133                 if (rx1 > rx2)
1134                         {
1135                         gdouble t;
1136                         t = rx1; rx1 = rx2; rx2 = t;
1137                         t = ry1; ry1 = ry2; ry2 = t;
1138                         }
1139
1140                 slope = rx2 - rx1;
1141                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1142                 for (x = rx1; x < rx2; x += 1.0)
1143                         {
1144                         px = (gint)(x + 0.5);
1145                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1146
1147                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1148                                 {
1149                                 pp = p_pix + py * prs + px * p_step;
1150                                 *pp = (r * a + *pp * (256-a)) >> 8;
1151                                 pp++;
1152                                 *pp = (g * a + *pp * (256-a)) >> 8;
1153                                 pp++;
1154                                 *pp = (b * a + *pp * (256-a)) >> 8;
1155                                 }
1156                         }
1157                 }
1158         else
1159                 {
1160                 if (ry1 > ry2)
1161                         {
1162                         gdouble t;
1163                         t = rx1; rx1 = rx2; rx2 = t;
1164                         t = ry1; ry1 = ry2; ry2 = t;
1165                         }
1166
1167                 slope = ry2 - ry1;
1168                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1169                 for (y = ry1; y < ry2; y += 1.0)
1170                         {
1171                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1172                         py = (gint)(y + 0.5);
1173
1174                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1175                                 {
1176                                 pp = p_pix + py * prs + px * p_step;
1177                                 *pp = (r * a + *pp * (256-a)) >> 8;
1178                                 pp++;
1179                                 *pp = (g * a + *pp * (256-a)) >> 8;
1180                                 pp++;
1181                                 *pp = (b * a + *pp * (256-a)) >> 8;
1182                                 }
1183                         }
1184                 }
1185 }
1186
1187 /*
1188  *-----------------------------------------------------------------------------
1189  * pixbuf drawing (fades and shadows)
1190  *-----------------------------------------------------------------------------
1191  */
1192
1193 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1194                                     gint s, gboolean vertical, gint border,
1195                                     gint x1, gint y1, gint x2, gint y2,
1196                                     guint8 r, guint8 g, guint8 b, guint8 a)
1197 {
1198         guchar *pp;
1199         gint p_step;
1200         guint8 n = a;
1201         gint i, j;
1202
1203         p_step = (has_alpha) ? 4 : 3;
1204         for (j = y1; j < y2; j++)
1205                 {
1206                 pp = p_pix + j * prs + x1 * p_step;
1207                 if (!vertical) n = a - a * abs(j - s) / border;
1208                 for (i = x1; i < x2; i++)
1209                         {
1210                         if (vertical) n = a - a * abs(i - s) / border;
1211                         *pp = (r * n + *pp * (256-n)) >> 8;
1212                         pp++;
1213                         *pp = (g * n + *pp * (256-n)) >> 8;
1214                         pp++;
1215                         *pp = (b * n + *pp * (256-n)) >> 8;
1216                         pp++;
1217                         if (has_alpha) pp++;
1218                         }
1219                 }
1220 }
1221
1222 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1223                                     gint sx, gint sy, gint border,
1224                                     gint x1, gint y1, gint x2, gint y2,
1225                                     guint8 r, guint8 g, guint8 b, guint8 a)
1226 {
1227         guchar *pp;
1228         gint p_step;
1229         gint i, j;
1230
1231         p_step = (has_alpha) ? 4 : 3;
1232         for (j = y1; j < y2; j++)
1233                 {
1234                 pp = p_pix + j * prs + x1 * p_step;
1235                 for (i = x1; i < x2; i++)
1236                         {
1237                         guint8 n;
1238                         gint r;
1239
1240                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1241                         n = a - a * r / border;
1242                         *pp = (r * n + *pp * (256-n)) >> 8;
1243                         pp++;
1244                         *pp = (g * n + *pp * (256-n)) >> 8;
1245                         pp++;
1246                         *pp = (b * n + *pp * (256-n)) >> 8;
1247                         pp++;
1248                         if (has_alpha) pp++;
1249                         }
1250                 }
1251 }
1252
1253 void pixbuf_draw_shadow(GdkPixbuf *pb,
1254                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1255                         gint x, gint y, gint w, gint h, gint border,
1256                         guint8 r, guint8 g, guint8 b, guint8 a)
1257 {
1258         gint has_alpha;
1259         gint pw, ph, prs;
1260         gint rx, ry, rw, rh;
1261         gint fx, fy, fw, fh;
1262         guchar *p_pix;
1263
1264         if (!pb) return;
1265
1266         pw = gdk_pixbuf_get_width(pb);
1267         ph = gdk_pixbuf_get_height(pb);
1268
1269         if (!util_clip_region(0, 0, pw, ph,
1270                               clip_x, clip_y, clip_w, clip_h,
1271                               &rx, &ry, &rw, &rh)) return;
1272
1273         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1274         prs = gdk_pixbuf_get_rowstride(pb);
1275         p_pix = gdk_pixbuf_get_pixels(pb);
1276
1277         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1278                              rx, ry, rw, rh,
1279                              &fx, &fy, &fw, &fh))
1280                 {
1281                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1282                 }
1283
1284         if (border < 1) return;
1285
1286         if (util_clip_region(x, y + border, border, h - border * 2,
1287                              rx, ry, rw, rh,
1288                              &fx, &fy, &fw, &fh))
1289                 {
1290                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1291                                         x + border, TRUE, border,
1292                                         fx, fy, fx + fw, fy + fh,
1293                                         r, g, b, a);
1294                 }
1295         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1296                              rx, ry, rw, rh,
1297                              &fx, &fy, &fw, &fh))
1298                 {
1299                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1300                                         x + w - border, TRUE, border,
1301                                         fx, fy, fx + fw, fy + fh,
1302                                         r, g, b, a);
1303                 }
1304         if (util_clip_region(x + border, y, w - border * 2, border,
1305                              rx, ry, rw, rh,
1306                              &fx, &fy, &fw, &fh))
1307                 {
1308                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1309                                         y + border, FALSE, border,
1310                                         fx, fy, fx + fw, fy + fh,
1311                                         r, g, b, a);
1312                 }
1313         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1314                              rx, ry, rw, rh,
1315                              &fx, &fy, &fw, &fh))
1316                 {
1317                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1318                                         y + h - border, FALSE, border,
1319                                         fx, fy, fx + fw, fy + fh,
1320                                         r, g, b, a);
1321                 }
1322         if (util_clip_region(x, y, border, border,
1323                              rx, ry, rw, rh,
1324                              &fx, &fy, &fw, &fh))
1325                 {
1326                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1327                                         x + border, y + border, border,
1328                                         fx, fy, fx + fw, fy + fh,
1329                                         r, g, b, a);
1330                 }
1331         if (util_clip_region(x + w - border, y, border, border,
1332                              rx, ry, rw, rh,
1333                              &fx, &fy, &fw, &fh))
1334                 {
1335                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1336                                         x + w - border, y + border, border,
1337                                         fx, fy, fx + fw, fy + fh,
1338                                         r, g, b, a);
1339                 }
1340         if (util_clip_region(x, y + h - border, border, border,
1341                              rx, ry, rw, rh,
1342                              &fx, &fy, &fw, &fh))
1343                 {
1344                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1345                                         x + border, y + h - border, border,
1346                                         fx, fy, fx + fw, fy + fh,
1347                                         r, g, b, a);
1348                 }
1349         if (util_clip_region(x + w - border, y + h - border, border, border,
1350                              rx, ry, rw, rh,
1351                              &fx, &fy, &fw, &fh))
1352                 {
1353                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1354                                         x + w - border, y + h - border, border,
1355                                         fx, fy, fx + fw, fy + fh,
1356                                         r, g, b, a);
1357                 }
1358 }
1359
1360
1361 /*
1362  *-----------------------------------------------------------------------------
1363  * pixbuf color alterations
1364  *-----------------------------------------------------------------------------
1365  */
1366
1367 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1368                             gint x, gint y, gint w, gint h)
1369 {
1370         gboolean has_alpha;
1371         gint pw, ph, prs;
1372         guchar *p_pix;
1373         guchar *pp;
1374         gint i, j;
1375
1376         if (!pb) return;
1377
1378         pw = gdk_pixbuf_get_width(pb);
1379         ph = gdk_pixbuf_get_height(pb);
1380
1381         if (x < 0 || x + w > pw) return;
1382         if (y < 0 || y + h > ph) return;
1383
1384         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1385         prs = gdk_pixbuf_get_rowstride(pb);
1386         p_pix = gdk_pixbuf_get_pixels(pb);
1387
1388         for (i = 0; i < h; i++)
1389                 {
1390                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1391                 for (j = 0; j < w; j++)
1392                         {
1393                         guint8 grey;
1394
1395                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1396                         *pp = grey;
1397                         pp++;
1398                         *pp = grey;
1399                         pp++;
1400                         *pp = grey;
1401                         pp++;
1402                         if (has_alpha) pp++;
1403                         }
1404                 }
1405 }
1406 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */