src/pixbuf-util.cc

   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
  25 #include "exif.h"
  26 #include "filedata.h"
  27 #include "ui-fileops.h"
  28
  29 #include <cmath>
  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 = nullptr;
  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 #pragma GCC diagnostic push
  64 #pragma GCC diagnostic ignored "-Wunused-function"
  65 gboolean pixbuf_to_file_as_jpg_unused(GdkPixbuf *pixbuf, const gchar *filename, gint quality)
  66 {
  67         GError *error = nullptr;
  68         gchar *qbuf;
  69         gboolean ret;
  70
  71         if (!pixbuf || !filename) return FALSE;
  72
  73         if (quality == -1) quality = 75;
  74         if (quality < 1 || quality > 100)
  75                 {
  76                 log_printf("Jpeg not saved, invalid quality %d\n", quality);
  77                 return FALSE;
  78                 }
  79
  80         qbuf = g_strdup_printf("%d", quality);
  81         ret = gdk_pixbuf_save(pixbuf, filename, "jpeg", &error, "quality", qbuf, NULL);
  82         g_free(qbuf);
  83
  84         if (error)
  85                 {
  86                 log_printf("Error saving jpeg to %s\n%s\n", filename, error->message);
  87                 g_error_free(error);
  88                 }
  89
  90         return ret;
  91 }
  92 #pragma GCC diagnostic pop
  93
  94 /*
  95  *-----------------------------------------------------------------------------
  96  * pixbuf from inline
  97  *-----------------------------------------------------------------------------
  98  */
  99
 100 struct PixbufInline
 101 {
 102         const gchar *key;
 103         const gchar *data;
 104 };
 105
 106 static PixbufInline inline_pixbuf_data[] = {
 107         {  PIXBUF_INLINE_ARCHIVE,                "gq-icon-archive-file" },
 108         {  PIXBUF_INLINE_BROKEN,                 "gq-icon-broken" },
 109         {  PIXBUF_INLINE_COLLECTION,             "gq-icon-collection" },
 110         {  PIXBUF_INLINE_ICON_180,               "gq-icon-rotate-180" },
 111         {  PIXBUF_INLINE_ICON_BOOK,              "gq-icon-book" },
 112         {  PIXBUF_INLINE_ICON_CONFIG,            "gq-icon-config" },
 113         {  PIXBUF_INLINE_ICON_DRAW_RECTANGLE,    "gq-icon-draw-rectangle" },
 114         {  PIXBUF_INLINE_ICON_EXIF,              "gq-icon-exif" },
 115         {  PIXBUF_INLINE_ICON_EXPOSURE,          "gq-icon-exposure" },
 116         {  PIXBUF_INLINE_ICON_FLOAT,             "gq-icon-float" },
 117         {  PIXBUF_INLINE_ICON,                   "gqview-icon" },
 118         {  PIXBUF_INLINE_ICON_GRAYSCALE,         "gq-icon-grayscale" },
 119         {  PIXBUF_INLINE_ICON_HEIF,              "gq-icon-heic" },
 120         {  PIXBUF_INLINE_ICON_HIDETOOLS,         "gq-icon-hidetools" },
 121         {  PIXBUF_INLINE_ICON_MAINTENANCE,       "gq-icon-maintenance" },
 122         {  PIXBUF_INLINE_ICON_MARKS,             "gq-icon-marks" },
 123         {  PIXBUF_INLINE_ICON_MOVE,              "gq-icon-move" },
 124         {  PIXBUF_INLINE_ICON_ORIGINAL,          "gq-icon-original" },
 125         {  PIXBUF_INLINE_ICON_PANORAMA,          "gq-icon-panorama" },
 126         {  PIXBUF_INLINE_ICON_PDF,               "gq-icon-pdf" },
 127         {  PIXBUF_INLINE_ICON_PROPERTIES,        "gq-icon-properties" },
 128         {  PIXBUF_INLINE_ICON_RENAME,            "gq-icon-rename" },
 129         {  PIXBUF_INLINE_ICON_SELECT_ALL,        "gq-icon-select-all" },
 130         {  PIXBUF_INLINE_ICON_SELECT_INVERT,     "gq-icon-select-invert" },
 131         {  PIXBUF_INLINE_ICON_SELECT_NONE,       "gq-icon-select-none" },
 132         {  PIXBUF_INLINE_ICON_SELECT_RECTANGLE,  "gq-icon-select-rectangle" },
 133         {  PIXBUF_INLINE_ICON_SORT,              "gq-icon-sort" },
 134         {  PIXBUF_INLINE_ICON_THUMB,             "gq-icon-thumb" },
 135         {  PIXBUF_INLINE_ICON_TOOLS,             "gq-icon-tools" },
 136         {  PIXBUF_INLINE_ICON_VIEW,              "gq-icon-view" },
 137         {  PIXBUF_INLINE_ICON_ZOOMFILLHOR,       "gq-icon-zoomfillhor" },
 138         {  PIXBUF_INLINE_ICON_ZOOMFILLVERT,      "gq-icon-zoomfillvert" },
 139         {  PIXBUF_INLINE_LOGO,                   "geeqie-logo" },
 140         {  PIXBUF_INLINE_METADATA,               "gq-icon-metadata" },
 141         {  PIXBUF_INLINE_SCROLLER,               "gq-scroller" },
 142         {  PIXBUF_INLINE_SPLIT_PANE_SYNC,        "gq-icon-split-pane-sync" },
 143         {  PIXBUF_INLINE_UNKNOWN,                "gq-icon-unknown" },
 144         {  PIXBUF_INLINE_VIDEO,                  "gq-icon-video" },
 145         {  nullptr,                              nullptr }
 146 };
 147
 148 GdkPixbuf *pixbuf_inline(const gchar *key)
 149 {
 150         gboolean dark = FALSE;
 151         gchar *file_name = nullptr;
 152         gchar *path;
 153         gchar *theme_name;
 154         GdkPixbuf *icon_pixbuf;
 155         GError *error = nullptr;
 156         GInputStream *in_stream;
 157         gint i;
 158         GtkSettings *settings;
 159
 160         if (!key) return nullptr;
 161
 162         settings = gtk_settings_get_default();
 163         g_object_get(settings, "gtk-theme-name", &theme_name, nullptr);
 164         dark = g_str_has_suffix(theme_name, "dark");
 165         g_free(theme_name);
 166
 167         i = 0;
 168         while (inline_pixbuf_data[i].key)
 169                 {
 170                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 171                         {
 172                         file_name = g_strconcat(inline_pixbuf_data[i].data, dark ? "-dark" : "", ".png", nullptr);
 173                         path = g_build_filename(GQ_RESOURCE_PATH_ICONS, file_name, nullptr);
 174                         g_free(file_name);
 175
 176                         in_stream = g_resources_open_stream(path, G_RESOURCE_LOOKUP_FLAGS_NONE, &error);
 177                         g_free(path);
 178
 179                         if (error)
 180                                 {
 181                                 g_error_free(error);
 182                                 error = nullptr;
 183
 184                                 file_name = g_strconcat(inline_pixbuf_data[i].data, ".png", nullptr);
 185                                 path = g_build_filename(GQ_RESOURCE_PATH_ICONS, file_name, nullptr);
 186                                 g_free(file_name);
 187
 188                                 in_stream = g_resources_open_stream(path, G_RESOURCE_LOOKUP_FLAGS_NONE, &error);
 189                                 g_free(path);
 190                                 }
 191
 192                         if (error)
 193                                 {
 194                                 log_printf("warning: inline pixbuf error: %s", error->message);
 195                                 g_error_free(error);
 196                                 g_object_unref(in_stream);
 197                                 return nullptr;
 198                                 }
 199
 200                         icon_pixbuf = gdk_pixbuf_new_from_stream(in_stream, nullptr, &error);
 201                         g_object_unref(in_stream);
 202
 203                         if (error)
 204                                 {
 205                                 log_printf("warning: inline pixbuf error: %s", error->message);
 206                                 g_error_free(error);
 207                                 return nullptr;
 208                                 }
 209
 210                         return icon_pixbuf;
 211                         }
 212                 i++;
 213                 }
 214
 215         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 216
 217         return nullptr;
 218 }
 219
 220 static void register_stock_icon(const gchar *key, GdkPixbuf *pixbuf)
 221 {
 222         static GtkIconFactory *icon_factory = nullptr;
 223         GtkIconSet *icon_set;
 224
 225         if (!icon_factory)
 226                 {
 227                 icon_factory = gtk_icon_factory_new();
 228                 gtk_icon_factory_add_default(icon_factory);
 229                 }
 230
 231         icon_set = gtk_icon_set_new_from_pixbuf(pixbuf);
 232         gtk_icon_factory_add(icon_factory, key, icon_set);
 233 }
 234
 235
 236 void pixbuf_inline_register_stock_icons()
 237 {
 238         gint i;
 239
 240         i = 0;
 241         while (inline_pixbuf_data[i].key)
 242                 {
 243                 register_stock_icon(inline_pixbuf_data[i].key, pixbuf_inline(inline_pixbuf_data[i].key));
 244                 i++;
 245                 }
 246 }
 247
 248 gboolean register_theme_icon_as_stock(const gchar *key, const gchar *icon)
 249 {
 250         GtkIconTheme *icon_theme;
 251         GdkPixbuf *pixbuf;
 252         GError *error = nullptr;
 253
 254         icon_theme = gtk_icon_theme_get_default();
 255
 256         if (gtk_icon_theme_has_icon(icon_theme, key)) return FALSE;
 257
 258         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 259                            icon, /* icon name */
 260                            64, /* size */
 261                            static_cast<GtkIconLookupFlags>(0),  /* flags */
 262                            &error);
 263         if (!pixbuf)
 264                 {
 265                 if (error)
 266                         {
 267                         DEBUG_1("Couldn't load icon %s: %s", icon, error->message);
 268                         g_error_free(error);
 269                         error = nullptr;
 270                         }
 271
 272                 if (strchr(icon, '.'))
 273                         {
 274                         /* try again without extension */
 275                         gchar *icon2 = remove_extension_from_path(icon);
 276                         pixbuf = gtk_icon_theme_load_icon(icon_theme,
 277                                            icon2, /* icon name */
 278                                            64, /* size */
 279                                            static_cast<GtkIconLookupFlags>(0),  /* flags */
 280                                            &error);
 281                         if (error)
 282                                 {
 283                                 DEBUG_1("Couldn't load icon %s: %s", icon2, error->message);
 284                                 g_error_free(error);
 285                                 error = nullptr;
 286
 287                                 /* try as an absolute path */
 288                                 pixbuf = gdk_pixbuf_new_from_file(icon, &error);
 289                                 if (error)
 290                                         {
 291                                         DEBUG_1("Couldn't load icon as absolute path %s: %s", icon, error->message);
 292                                         g_error_free(error);
 293                                         }
 294                                 }
 295                         g_free(icon2);
 296                         }
 297                 }
 298
 299         if (!pixbuf) return FALSE;
 300
 301         register_stock_icon(key, pixbuf);
 302         return TRUE;
 303 }
 304
 305 gboolean pixbuf_scale_aspect(gint req_w, gint req_h,
 306                              gint old_w, gint old_h,
 307                              gint *new_w, gint *new_h)
 308 {
 309         if ((static_cast<gdouble>(req_w) / old_w) < (static_cast<gdouble>(req_h) / old_h))
 310                 {
 311                 *new_w = req_w;
 312                 *new_h = static_cast<gdouble>(*new_w) / old_w * old_h;
 313                 if (*new_h < 1) *new_h = 1;
 314                 }
 315         else
 316                 {
 317                 *new_h = req_h;
 318                 *new_w = static_cast<gdouble>(*new_h) / old_h * old_w;
 319                 if (*new_w < 1) *new_w = 1;
 320                 }
 321
 322         return (*new_w != old_w || *new_h != old_h);
 323 }
 324
 325 GdkPixbuf *pixbuf_fallback(FileData *fd, gint requested_width, gint requested_height)
 326 {
 327         GdkPixbuf *pixbuf;
 328
 329         switch (fd->format_class)
 330                 {
 331                 case FORMAT_CLASS_UNKNOWN:
 332                         pixbuf = pixbuf_inline(PIXBUF_INLINE_UNKNOWN);
 333                         break;
 334                 case FORMAT_CLASS_META:
 335                         pixbuf = pixbuf_inline(PIXBUF_INLINE_METADATA);
 336                         break;
 337                 case FORMAT_CLASS_VIDEO:
 338                         pixbuf = pixbuf_inline(PIXBUF_INLINE_VIDEO);
 339                         break;
 340                 case FORMAT_CLASS_COLLECTION:
 341                         pixbuf = pixbuf_inline(PIXBUF_INLINE_COLLECTION);
 342                         break;
 343                 case FORMAT_CLASS_DOCUMENT:
 344                         pixbuf = pixbuf_inline(PIXBUF_INLINE_ICON_PDF);
 345                         break;
 346                 case FORMAT_CLASS_ARCHIVE:
 347                         pixbuf = pixbuf_inline(PIXBUF_INLINE_ARCHIVE);
 348                         break;
 349                 default:
 350                         pixbuf = pixbuf_inline(PIXBUF_INLINE_BROKEN);
 351                 }
 352
 353         if (requested_width && requested_height)
 354                 {
 355                 gint w = gdk_pixbuf_get_width(pixbuf);
 356                 gint h = gdk_pixbuf_get_height(pixbuf);
 357
 358                 if (w > requested_width || h > requested_height)
 359                         {
 360                         gint nw, nh;
 361
 362                         if (pixbuf_scale_aspect(requested_width, requested_height,
 363                                                           w, h, &nw, &nh))
 364                                 {
 365                                 GdkPixbuf *tmp;
 366
 367                                 tmp = pixbuf;
 368                                 pixbuf = gdk_pixbuf_scale_simple(tmp, nw, nh, GDK_INTERP_TILES);
 369                                 g_object_unref(G_OBJECT(tmp));
 370                                 }
 371                         }
 372                 }
 373         return pixbuf;
 374 }
 375
 376
 377 /*
 378  *-----------------------------------------------------------------------------
 379  * misc utils
 380  *-----------------------------------------------------------------------------
 381  */
 382
 383 gboolean util_clip_region(gint x, gint y, gint w, gint h,
 384                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 385                           gint *rx, gint *ry, gint *rw, gint *rh)
 386 {
 387         if (clip_x + clip_w <= x ||
 388             clip_x >= x + w ||
 389             clip_y + clip_h <= y ||
 390             clip_y >= y + h)
 391                 {
 392                 return FALSE;
 393                 }
 394
 395         *rx = MAX(x, clip_x);
 396         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 397
 398         *ry = MAX(y, clip_y);
 399         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 400
 401         return TRUE;
 402 }
 403
 404 /*
 405  *-----------------------------------------------------------------------------
 406  * pixbuf rotation
 407  *-----------------------------------------------------------------------------
 408  */
 409
 410 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 411                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 412                                      gint bytes_per_pixel, gboolean counter_clockwise)
 413 {
 414         gint i, j;
 415         guchar *sp;
 416         guchar *dp;
 417
 418         for (i = 0; i < h; i++)
 419                 {
 420                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 421                 for (j = 0; j < w; j++)
 422                         {
 423                         if (counter_clockwise)
 424                                 {
 425                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 426                                 }
 427                         else
 428                                 {
 429                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 430                                 }
 431                         *(dp++) = *(sp++);      /* r */
 432                         *(dp++) = *(sp++);      /* g */
 433                         *(dp++) = *(sp++);      /* b */
 434                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 435                         }
 436                 }
 437
 438 }
 439
 440 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 441                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 442 {
 443         gint i;
 444         guchar *sp;
 445         guchar *dp;
 446
 447         for (i = 0; i < h; i++)
 448                 {
 449                 sp = src + (i * src_row_stride);
 450                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 451                 memcpy(dp, sp, w * bytes_per_pixel);
 452                 }
 453 }
 454
 455 #define ROTATE_BUFFER_WIDTH 48
 456 #define ROTATE_BUFFER_HEIGHT 48
 457
 458 /*
 459  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 460  *
 461  */
 462 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gboolean counter_clockwise)
 463 {
 464         GdkPixbuf *dest;
 465         gboolean has_alpha;
 466         gint sw, sh, srs;
 467         gint dw, dh, drs;
 468         guchar *s_pix;
 469         guchar *d_pix;
 470         gint i, j;
 471         gint a;
 472         GdkPixbuf *buffer;
 473         guchar *b_pix;
 474         gint brs;
 475         gint w, h;
 476
 477         if (!src) return nullptr;
 478
 479         sw = gdk_pixbuf_get_width(src);
 480         sh = gdk_pixbuf_get_height(src);
 481         has_alpha = gdk_pixbuf_get_has_alpha(src);
 482         srs = gdk_pixbuf_get_rowstride(src);
 483         s_pix = gdk_pixbuf_get_pixels(src);
 484
 485         dw = sh;
 486         dh = sw;
 487         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 488         drs = gdk_pixbuf_get_rowstride(dest);
 489         d_pix = gdk_pixbuf_get_pixels(dest);
 490
 491         a = (has_alpha ? 4 : 3);
 492
 493         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 494                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 495         b_pix = gdk_pixbuf_get_pixels(buffer);
 496         brs = gdk_pixbuf_get_rowstride(buffer);
 497
 498         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 499                 {
 500                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 501                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 502                         {
 503                         gint x, y;
 504
 505                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 506                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 507                                                  b_pix, brs, h, w,
 508                                                  a, counter_clockwise);
 509
 510                         if (counter_clockwise)
 511                                 {
 512                                 x = i;
 513                                 y = sw - h - j;
 514                                 }
 515                         else
 516                                 {
 517                                 x = sh - w - i;
 518                                 y = j;
 519                                 }
 520                         pixbuf_copy_block(b_pix, brs, w, h,
 521                                           d_pix, drs, x, y, a);
 522                         }
 523                 }
 524
 525         g_object_unref(buffer);
 526
 527 #if 0
 528         /* this is the simple version of rotation (roughly 2-4x slower) */
 529
 530         for (i = 0; i < sh; i++)
 531                 {
 532                 sp = s_pix + (i * srs);
 533                 for (j = 0; j < sw; j++)
 534                         {
 535                         if (counter_clockwise)
 536                                 {
 537                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 538                                 }
 539                         else
 540                                 {
 541                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 542                                 }
 543
 544                         *(dp++) = *(sp++);      /* r */
 545                         *(dp++) = *(sp++);      /* g */
 546                         *(dp++) = *(sp++);      /* b */
 547                         if (has_alpha) *(dp) = *(sp++); /* a */
 548                         }
 549                 }
 550 #endif
 551
 552         return dest;
 553 }
 554
 555 /*
 556  * Returns a copy of pixbuf mirrored and or flipped.
 557  * TO do a 180 degree rotations set both mirror and flipped TRUE
 558  * if mirror and flip are FALSE, result is a simple copy.
 559  */
 560 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gboolean mirror, gboolean flip)
 561 {
 562         GdkPixbuf *dest;
 563         gboolean has_alpha;
 564         gint w, h, srs;
 565         gint drs;
 566         guchar *s_pix;
 567         guchar *d_pix;
 568         guchar *sp;
 569         guchar *dp;
 570         gint i, j;
 571         gint a;
 572
 573         if (!src) return nullptr;
 574
 575         w = gdk_pixbuf_get_width(src);
 576         h = gdk_pixbuf_get_height(src);
 577         has_alpha = gdk_pixbuf_get_has_alpha(src);
 578         srs = gdk_pixbuf_get_rowstride(src);
 579         s_pix = gdk_pixbuf_get_pixels(src);
 580
 581         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 582         drs = gdk_pixbuf_get_rowstride(dest);
 583         d_pix = gdk_pixbuf_get_pixels(dest);
 584
 585         a = has_alpha ? 4 : 3;
 586
 587         for (i = 0; i < h; i++)
 588                 {
 589                 sp = s_pix + (i * srs);
 590                 if (flip)
 591                         {
 592                         dp = d_pix + ((h - i - 1) * drs);
 593                         }
 594                 else
 595                         {
 596                         dp = d_pix + (i * drs);
 597                         }
 598                 if (mirror)
 599                         {
 600                         dp += (w - 1) * a;
 601                         for (j = 0; j < w; j++)
 602                                 {
 603                                 *(dp++) = *(sp++);      /* r */
 604                                 *(dp++) = *(sp++);      /* g */
 605                                 *(dp++) = *(sp++);      /* b */
 606                                 if (has_alpha) *(dp) = *(sp++); /* a */
 607                                 dp -= (a + 3);
 608                                 }
 609                         }
 610                 else
 611                         {
 612                         for (j = 0; j < w; j++)
 613                                 {
 614                                 *(dp++) = *(sp++);      /* r */
 615                                 *(dp++) = *(sp++);      /* g */
 616                                 *(dp++) = *(sp++);      /* b */
 617                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 618                                 }
 619                         }
 620                 }
 621
 622         return dest;
 623 }
 624
 625 GdkPixbuf *pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 626 {
 627         GdkPixbuf *dest;
 628         GdkPixbuf *tmp = nullptr;
 629
 630         switch (orientation)
 631                 {
 632                 case EXIF_ORIENTATION_TOP_LEFT:
 633                         dest = gdk_pixbuf_copy(pixbuf);
 634                         break;
 635                 case EXIF_ORIENTATION_TOP_RIGHT:
 636                         /* mirrored */
 637                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 638                         break;
 639                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 640                         /* upside down */
 641                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 642                         break;
 643                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 644                         /* flipped */
 645                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 646                         break;
 647                 case EXIF_ORIENTATION_LEFT_TOP:
 648                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 649                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 650                         break;
 651                 case EXIF_ORIENTATION_RIGHT_TOP:
 652                         /* rotated -90 (270) */
 653                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 654                         break;
 655                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 656                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 657                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 658                         break;
 659                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 660                         /* rotated 90 */
 661                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 662                         break;
 663                 default:
 664                         dest = gdk_pixbuf_copy(pixbuf);
 665                         break;
 666                 }
 667         if (tmp) g_object_unref(tmp);
 668         return dest;
 669
 670 }
 671
 672
 673 /*
 674  *-----------------------------------------------------------------------------
 675  * pixbuf drawing (rectangles)
 676  *-----------------------------------------------------------------------------
 677  */
 678
 679 /*
 680  * Fills region of pixbuf at x,y over w,h
 681  * with colors red (r), green (g), blue (b)
 682  * applying alpha (a), use a=255 for solid.
 683  */
 684 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 685                            gint x, gint y, gint w, gint h,
 686                            gint r, gint g, gint b, gint a)
 687 {
 688         gboolean has_alpha;
 689         gint pw, ph, prs;
 690         guchar *p_pix;
 691         guchar *pp;
 692         gint i, j;
 693
 694         if (!pb) return;
 695
 696         pw = gdk_pixbuf_get_width(pb);
 697         ph = gdk_pixbuf_get_height(pb);
 698
 699         if (x < 0 || x + w > pw) return;
 700         if (y < 0 || y + h > ph) return;
 701
 702         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 703         prs = gdk_pixbuf_get_rowstride(pb);
 704         p_pix = gdk_pixbuf_get_pixels(pb);
 705
 706         for (i = 0; i < h; i++)
 707                 {
 708                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 709                 for (j = 0; j < w; j++)
 710                         {
 711                         *pp = (r * a + *pp * (256-a)) >> 8;
 712                         pp++;
 713                         *pp = (g * a + *pp * (256-a)) >> 8;
 714                         pp++;
 715                         *pp = (b * a + *pp * (256-a)) >> 8;
 716                         pp++;
 717                         if (has_alpha) pp++;
 718                         }
 719                 }
 720 }
 721
 722 #pragma GCC diagnostic push
 723 #pragma GCC diagnostic ignored "-Wunused-function"
 724 void pixbuf_draw_rect_unused(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_draw_rect_fill(pb, x + left, y, w - left - right, top,
 730                               r, g, b ,a);
 731         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 732                               r, g, b ,a);
 733         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 734                               r, g, b ,a);
 735         pixbuf_draw_rect_fill(pb, x, y, left, h,
 736                               r, g, b ,a);
 737 }
 738 #pragma GCC diagnostic pop
 739
 740 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 741                           gint x, gint y, gint w, gint h,
 742                           gint r, gint g, gint b, gint a)
 743 {
 744         gboolean has_alpha;
 745         gint pw, ph, prs;
 746         guchar *p_pix;
 747         guchar *pp;
 748         gint i, j;
 749
 750         if (!pb) return;
 751
 752         pw = gdk_pixbuf_get_width(pb);
 753         ph = gdk_pixbuf_get_height(pb);
 754
 755         if (x < 0 || x + w > pw) return;
 756         if (y < 0 || y + h > ph) return;
 757
 758         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 759         prs = gdk_pixbuf_get_rowstride(pb);
 760         p_pix = gdk_pixbuf_get_pixels(pb);
 761
 762         for (i = 0; i < h; i++)
 763                 {
 764                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
 765                 for (j = 0; j < w; j++)
 766                         {
 767                         *pp = r; pp++;
 768                         *pp = g; pp++;
 769                         *pp = b; pp++;
 770                         if (has_alpha) { *pp = a; pp++; }
 771                         }
 772                 }
 773 }
 774
 775 void pixbuf_set_rect(GdkPixbuf *pb,
 776                      gint x, gint y, gint w, gint h,
 777                      gint r, gint g, gint b, gint a,
 778                      gint left, gint right, gint top, gint bottom)
 779 {
 780         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 781                              r, g, b ,a);
 782         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 783                              r, g, b ,a);
 784         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 785                              r, g, b ,a);
 786         pixbuf_set_rect_fill(pb, x, y, left, h,
 787                              r, g, b ,a);
 788 }
 789
 790 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 791 {
 792         guchar *buf;
 793         gboolean has_alpha;
 794         gint rowstride;
 795         guchar *p;
 796
 797         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 798             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 799
 800         buf = gdk_pixbuf_get_pixels(pb);
 801         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 802         rowstride = gdk_pixbuf_get_rowstride(pb);
 803
 804         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 805         *p = r; p++;
 806         *p = g; p++;
 807         *p = b; p++;
 808         if (has_alpha) *p = a;
 809 }
 810
 811
 812 /*
 813  *-----------------------------------------------------------------------------
 814  * pixbuf text rendering
 815  *-----------------------------------------------------------------------------
 816  */
 817
 818 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 819                              GdkPixbuf *dest, gint dx, gint dy,
 820                              gint w, gint h,
 821                              guint8 r, guint8 g, guint8 b, guint8 a)
 822 {
 823         gint sw, sh, srs;
 824         gboolean s_alpha;
 825         gint s_step;
 826         guchar *s_pix;
 827         gint dw, dh, drs;
 828         gboolean d_alpha;
 829         gint d_step;
 830         guchar *d_pix;
 831
 832         guchar *sp;
 833         guchar *dp;
 834         gint i, j;
 835
 836         if (!src || !dest) return;
 837
 838         sw = gdk_pixbuf_get_width(src);
 839         sh = gdk_pixbuf_get_height(src);
 840
 841         if (sx < 0 || sx + w > sw) return;
 842         if (sy < 0 || sy + h > sh) return;
 843
 844         dw = gdk_pixbuf_get_width(dest);
 845         dh = gdk_pixbuf_get_height(dest);
 846
 847         if (dx < 0 || dx + w > dw) return;
 848         if (dy < 0 || dy + h > dh) return;
 849
 850         s_alpha = gdk_pixbuf_get_has_alpha(src);
 851         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 852         srs = gdk_pixbuf_get_rowstride(src);
 853         drs = gdk_pixbuf_get_rowstride(dest);
 854         s_pix = gdk_pixbuf_get_pixels(src);
 855         d_pix = gdk_pixbuf_get_pixels(dest);
 856
 857         s_step = (s_alpha) ? 4 : 3;
 858         d_step = (d_alpha) ? 4 : 3;
 859
 860         for (i = 0; i < h; i++)
 861                 {
 862                 sp = s_pix + (sy + i) * srs + sx * s_step;
 863                 dp = d_pix + (dy + i) * drs + dx * d_step;
 864                 for (j = 0; j < w; j++)
 865                         {
 866                         if (*sp)
 867                                 {
 868                                 guint8 asub;
 869
 870                                 asub = a * sp[0] / 255;
 871                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 872                                 dp++;
 873                                 asub = a * sp[1] / 255;
 874                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 875                                 dp++;
 876                                 asub = a * sp[2] / 255;
 877                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 878                                 dp++;
 879
 880                                 if (d_alpha)
 881                                         {
 882                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 883                                         dp++;
 884                                         }
 885                                 }
 886                         else
 887                                 {
 888                                 dp += d_step;
 889                                 }
 890
 891                         sp += s_step;
 892                         }
 893                 }
 894 }
 895
 896 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *,
 897                         gint x, gint y,
 898                         guint8 r, guint8 g, guint8 b, guint8 a)
 899 {
 900         GdkPixbuf *buffer;
 901         gint w, h;
 902         gint sx, sy;
 903         gint dw, dh;
 904         cairo_surface_t *source;
 905         cairo_t *cr;
 906
 907         pango_layout_get_pixel_size(layout, &w, &h);
 908         if (w < 1 || h < 1) return;
 909
 910         source = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
 911
 912         cr = cairo_create (source);
 913         cairo_set_source_rgb(cr, 0, 0, 0);
 914         cairo_rectangle (cr, 0, 0, w, h);
 915         cairo_fill (cr);
 916         cairo_set_source_rgb(cr, 1, 1, 1);
 917         pango_cairo_show_layout (cr, layout);
 918         cairo_destroy (cr);
 919
 920         buffer = gdk_pixbuf_new_from_data (cairo_image_surface_get_data (source),
 921                                            GDK_COLORSPACE_RGB,
 922                                            cairo_image_surface_get_format (source) == CAIRO_FORMAT_ARGB32,
 923                                            8,
 924                                            cairo_image_surface_get_width (source),
 925                                            cairo_image_surface_get_height (source),
 926                                            cairo_image_surface_get_stride (source),
 927                                            nullptr,
 928                                            nullptr);
 929
 930         sx = 0;
 931         sy = 0;
 932         dw = gdk_pixbuf_get_width(pixbuf);
 933         dh = gdk_pixbuf_get_height(pixbuf);
 934
 935         if (x < 0)
 936                 {
 937                 w += x;
 938                 sx = -x;
 939                 x = 0;
 940                 }
 941
 942         if (y < 0)
 943                 {
 944                 h += y;
 945                 sy = -y;
 946                 y = 0;
 947                 }
 948
 949         if (x + w > dw) w = dw - x;
 950         if (y + h > dh) h = dh - y;
 951
 952         pixbuf_copy_font(buffer, sx, sy,
 953                          pixbuf, x, y, w, h,
 954                          r, g, b, a);
 955
 956         g_object_unref(buffer);
 957         cairo_surface_destroy(source);
 958 }
 959
 960 /*
 961  *-----------------------------------------------------------------------------
 962  * pixbuf drawing (triangle)
 963  *-----------------------------------------------------------------------------
 964  */
 965
 966 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 967                         gint *rx, gint *ry, gint *rw, gint *rh)
 968 {
 969         gint tx, ty, tw, th;
 970
 971         tx = MIN(x1, x2);
 972         tx = MIN(tx, x3);
 973         ty = MIN(y1, y2);
 974         ty = MIN(ty, y3);
 975         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 976         tw = MAX(tw, abs(x3 - x1));
 977         th = MAX(abs(y1 - y2), abs(y2 - y3));
 978         th = MAX(th, abs(y3 - y1));
 979
 980         *rx = tx;
 981         *ry = ty;
 982         *rw = tw;
 983         *rh = th;
 984 }
 985
 986 void pixbuf_draw_triangle(GdkPixbuf *pb,
 987                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 988                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 989                           guint8 r, guint8 g, guint8 b, guint8 a)
 990 {
 991         gboolean has_alpha;
 992         gint pw, ph, prs;
 993         gint rx, ry, rw, rh;
 994         gint tx, ty, tw, th;
 995         gint fx1, fy1;
 996         gint fx2, fy2;
 997         gint fw, fh;
 998         guchar *p_pix;
 999         guchar *pp;
1000         gint p_step;
1001         gdouble slope1, slope2;
1002         gint slope1_x, slope1_y;
1003         gint y;
1004         gint t;
1005         gboolean middle = FALSE;
1006
1007         if (!pb) return;
1008
1009         pw = gdk_pixbuf_get_width(pb);
1010         ph = gdk_pixbuf_get_height(pb);
1011
1012         if (!util_clip_region(0, 0, pw, ph,
1013                               clip_x, clip_y, clip_w, clip_h,
1014                               &rx, &ry, &rw, &rh)) return;
1015
1016         util_clip_triangle(x1, y1, x2, y2, x3, y3,
1017                            &tx, &ty, &tw, &th);
1018
1019         if (!util_clip_region(rx, ry, rw, rh,
1020                               tx, ty, tw, th,
1021                               &fx1, &fy1, &fw, &fh)) return;
1022         fx2 = fx1 + fw;
1023         fy2 = fy1 + fh;
1024
1025         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1026         prs = gdk_pixbuf_get_rowstride(pb);
1027         p_pix = gdk_pixbuf_get_pixels(pb);
1028
1029         p_step = (has_alpha) ? 4 : 3;
1030
1031         if (y1 > y2)
1032                 {
1033                 t = x1; x1 = x2; x2 = t;
1034                 t = y1; y1 = y2; y2 = t;
1035                 }
1036         if (y2 > y3)
1037                 {
1038                 t = x2; x2 = x3; x3 = t;
1039                 t = y2; y2 = y3; y3 = t;
1040                 }
1041         if (y1 > y2)
1042                 {
1043                 t = x1; x1 = x2; x2 = t;
1044                 t = y1; y1 = y2; y2 = t;
1045                 }
1046
1047         slope1 = static_cast<gdouble>(y2 - y1);
1048         if (slope1) slope1 = static_cast<gdouble>(x2 - x1) / slope1;
1049         slope1_x = x1;
1050         slope1_y = y1;
1051         slope2 = static_cast<gdouble>(y3 - y1);
1052         if (slope2) slope2 = static_cast<gdouble>(x3 - x1) / slope2;
1053
1054         for (y = fy1; y < fy2; y++)
1055                 {
1056                 gint xa, xb;
1057
1058                 if (!middle && y > y2)
1059                         {
1060                         slope1 = static_cast<gdouble>(y3 - y2);
1061                         if (slope1) slope1 = static_cast<gdouble>(x3 - x2) / slope1;
1062                         slope1_x = x2;
1063                         slope1_y = y2;
1064
1065                         middle = TRUE;
1066                         }
1067
1068                 xa = slope1_x + (slope1 * (y - slope1_y) + 0.5);
1069                 xb = x1 + (slope2 * (y - y1) + 0.5);
1070
1071                 if (xa > xb)
1072                         {
1073                         t = xa; xa = xb; xb = t;
1074                         }
1075
1076                 xa = CLAMP(xa, fx1, fx2);
1077                 xb = CLAMP(xb, fx1, fx2);
1078
1079                 pp = p_pix + y * prs + xa * p_step;
1080
1081                 while (xa < xb)
1082                         {
1083                         *pp = (r * a + *pp * (256-a)) >> 8;
1084                         pp++;
1085                         *pp = (g * a + *pp * (256-a)) >> 8;
1086                         pp++;
1087                         *pp = (b * a + *pp * (256-a)) >> 8;
1088                         pp++;
1089                         if (has_alpha) pp++;
1090
1091                         xa++;
1092                         }
1093                 }
1094 }
1095
1096 /*
1097  *-----------------------------------------------------------------------------
1098  * pixbuf drawing (line)
1099  *-----------------------------------------------------------------------------
1100  */
1101
1102 static gboolean util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
1103                                gdouble x1, gdouble y1, gdouble x2, gdouble y2,
1104                                gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
1105 {
1106         gboolean flip = FALSE;
1107         gdouble d;
1108
1109         if (x1 > x2)
1110                 {
1111                 gdouble t;
1112
1113                 t = x1; x1 = x2; x2 = t;
1114                 t = y1; y1 = y2; y2 = t;
1115                 flip = TRUE;
1116                 }
1117
1118         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
1119
1120         if (y1 < y2)
1121                 {
1122                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1123                 }
1124         else
1125                 {
1126                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1127                 }
1128
1129         d = x2 - x1;
1130         if (d > 0.0)
1131                 {
1132                 gdouble slope;
1133
1134                 slope = (y2 - y1) / d;
1135                 if (x1 < clip_x)
1136                         {
1137                         y1 = y1 + slope * (clip_x - x1);
1138                         x1 = clip_x;
1139                         }
1140                 if (x2 > clip_x + clip_w)
1141                         {
1142                         y2 = y2 + slope * (clip_x + clip_w - x2);
1143                         x2 = clip_x + clip_w;
1144                         }
1145                 }
1146
1147         if (y1 < y2)
1148                 {
1149                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
1150                 }
1151         else
1152                 {
1153                 gdouble t;
1154
1155                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
1156
1157                 t = x1; x1 = x2; x2 = t;
1158                 t = y1; y1 = y2; y2 = t;
1159                 flip = !flip;
1160                 }
1161
1162         d = y2 - y1;
1163         if (d > 0.0)
1164                 {
1165                 gdouble slope;
1166
1167                 slope = (x2 - x1) / d;
1168                 if (y1 < clip_y)
1169                         {
1170                         x1 = x1 + slope * (clip_y - y1);
1171                         y1 = clip_y;
1172                         }
1173                 if (y2 > clip_y + clip_h)
1174                         {
1175                         x2 = x2 + slope * (clip_y + clip_h - y2);
1176                         y2 = clip_y + clip_h;
1177                         }
1178                 }
1179
1180         if (flip)
1181                 {
1182                 *rx1 = x2;
1183                 *ry1 = y2;
1184                 *rx2 = x1;
1185                 *ry2 = y1;
1186                 }
1187         else
1188                 {
1189                 *rx1 = x1;
1190                 *ry1 = y1;
1191                 *rx2 = x2;
1192                 *ry2 = y2;
1193                 }
1194
1195         return TRUE;
1196 }
1197
1198 void pixbuf_draw_line(GdkPixbuf *pb,
1199                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1200                       gint x1, gint y1, gint x2, gint y2,
1201                       guint8 r, guint8 g, guint8 b, guint8 a)
1202 {
1203         gboolean has_alpha;
1204         gint pw, ph, prs;
1205         gint rx, ry, rw, rh;
1206         gdouble rx1, ry1, rx2, ry2;
1207         guchar *p_pix;
1208         guchar *pp;
1209         gint p_step;
1210         gdouble slope;
1211         gdouble x, y;
1212         gint px, py;
1213         gint cx1, cy1, cx2, cy2;
1214
1215         if (!pb) return;
1216
1217         pw = gdk_pixbuf_get_width(pb);
1218         ph = gdk_pixbuf_get_height(pb);
1219
1220         if (!util_clip_region(0, 0, pw, ph,
1221                               clip_x, clip_y, clip_w, clip_h,
1222                               &rx, &ry, &rw, &rh)) return;
1223         if (!util_clip_line(static_cast<gdouble>(rx), static_cast<gdouble>(ry), static_cast<gdouble>(rw), static_cast<gdouble>(rh),
1224                             static_cast<gdouble>(x1), static_cast<gdouble>(y1), static_cast<gdouble>(x2), static_cast<gdouble>(y2),
1225                             &rx1, &ry1, &rx2, &ry2)) return;
1226
1227         cx1 = rx;
1228         cy1 = ry;
1229         cx2 = rx + rw;
1230         cy2 = ry + rh;
1231
1232         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1233         prs = gdk_pixbuf_get_rowstride(pb);
1234         p_pix = gdk_pixbuf_get_pixels(pb);
1235
1236         p_step = (has_alpha) ? 4 : 3;
1237
1238         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1239                 {
1240                 if (rx1 > rx2)
1241                         {
1242                         gdouble t;
1243                         t = rx1; rx1 = rx2; rx2 = t;
1244                         t = ry1; ry1 = ry2; ry2 = t;
1245                         }
1246
1247                 slope = rx2 - rx1;
1248                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1249                 for (x = rx1; x < rx2; x += 1.0)
1250                         {
1251                         px = static_cast<gint>(x + 0.5);
1252                         py = static_cast<gint>(ry1 + (x - rx1) * slope + 0.5);
1253
1254                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1255                                 {
1256                                 pp = p_pix + py * prs + px * p_step;
1257                                 *pp = (r * a + *pp * (256-a)) >> 8;
1258                                 pp++;
1259                                 *pp = (g * a + *pp * (256-a)) >> 8;
1260                                 pp++;
1261                                 *pp = (b * a + *pp * (256-a)) >> 8;
1262                                 }
1263                         }
1264                 }
1265         else
1266                 {
1267                 if (ry1 > ry2)
1268                         {
1269                         gdouble t;
1270                         t = rx1; rx1 = rx2; rx2 = t;
1271                         t = ry1; ry1 = ry2; ry2 = t;
1272                         }
1273
1274                 slope = ry2 - ry1;
1275                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1276                 for (y = ry1; y < ry2; y += 1.0)
1277                         {
1278                         px = static_cast<gint>(rx1 + (y - ry1) * slope + 0.5);
1279                         py = static_cast<gint>(y + 0.5);
1280
1281                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1282                                 {
1283                                 pp = p_pix + py * prs + px * p_step;
1284                                 *pp = (r * a + *pp * (256-a)) >> 8;
1285                                 pp++;
1286                                 *pp = (g * a + *pp * (256-a)) >> 8;
1287                                 pp++;
1288                                 *pp = (b * a + *pp * (256-a)) >> 8;
1289                                 }
1290                         }
1291                 }
1292 }
1293
1294 /*
1295  *-----------------------------------------------------------------------------
1296  * pixbuf drawing (fades and shadows)
1297  *-----------------------------------------------------------------------------
1298  */
1299
1300 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gboolean has_alpha,
1301                                     gint s, gboolean vertical, gint border,
1302                                     gint x1, gint y1, gint x2, gint y2,
1303                                     guint8 r, guint8 g, guint8 b, guint8 a)
1304 {
1305         guchar *pp;
1306         gint p_step;
1307         guint8 n = a;
1308         gint i, j;
1309
1310         p_step = (has_alpha) ? 4 : 3;
1311         for (j = y1; j < y2; j++)
1312                 {
1313                 pp = p_pix + j * prs + x1 * p_step;
1314                 if (!vertical) n = a - a * abs(j - s) / border;
1315                 for (i = x1; i < x2; i++)
1316                         {
1317                         if (vertical) n = a - a * abs(i - s) / border;
1318                         *pp = (r * n + *pp * (256-n)) >> 8;
1319                         pp++;
1320                         *pp = (g * n + *pp * (256-n)) >> 8;
1321                         pp++;
1322                         *pp = (b * n + *pp * (256-n)) >> 8;
1323                         pp++;
1324                         if (has_alpha) pp++;
1325                         }
1326                 }
1327 }
1328
1329 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gboolean has_alpha,
1330                                     gint sx, gint sy, gint border,
1331                                     gint x1, gint y1, gint x2, gint y2,
1332                                     guint8, guint8 g, guint8 b, guint8 a)
1333 {
1334         guchar *pp;
1335         gint p_step;
1336         gint i, j;
1337
1338         p_step = (has_alpha) ? 4 : 3;
1339         for (j = y1; j < y2; j++)
1340                 {
1341                 pp = p_pix + j * prs + x1 * p_step;
1342                 for (i = x1; i < x2; i++)
1343                         {
1344                         guint8 n;
1345                         gint r;
1346
1347                         r = MIN(border, (gint)hypot(i - sx, j - sy));
1348                         n = a - a * r / border;
1349                         *pp = (r * n + *pp * (256-n)) >> 8;
1350                         pp++;
1351                         *pp = (g * n + *pp * (256-n)) >> 8;
1352                         pp++;
1353                         *pp = (b * n + *pp * (256-n)) >> 8;
1354                         pp++;
1355                         if (has_alpha) pp++;
1356                         }
1357                 }
1358 }
1359
1360 void pixbuf_draw_shadow(GdkPixbuf *pb,
1361                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1362                         gint x, gint y, gint w, gint h, gint border,
1363                         guint8 r, guint8 g, guint8 b, guint8 a)
1364 {
1365         gint has_alpha;
1366         gint pw, ph, prs;
1367         gint rx, ry, rw, rh;
1368         gint fx, fy, fw, fh;
1369         guchar *p_pix;
1370
1371         if (!pb) return;
1372
1373         pw = gdk_pixbuf_get_width(pb);
1374         ph = gdk_pixbuf_get_height(pb);
1375
1376         if (!util_clip_region(0, 0, pw, ph,
1377                               clip_x, clip_y, clip_w, clip_h,
1378                               &rx, &ry, &rw, &rh)) return;
1379
1380         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1381         prs = gdk_pixbuf_get_rowstride(pb);
1382         p_pix = gdk_pixbuf_get_pixels(pb);
1383
1384         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1385                              rx, ry, rw, rh,
1386                              &fx, &fy, &fw, &fh))
1387                 {
1388                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1389                 }
1390
1391         if (border < 1) return;
1392
1393         if (util_clip_region(x, y + border, border, h - border * 2,
1394                              rx, ry, rw, rh,
1395                              &fx, &fy, &fw, &fh))
1396                 {
1397                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1398                                         x + border, TRUE, border,
1399                                         fx, fy, fx + fw, fy + fh,
1400                                         r, g, b, a);
1401                 }
1402         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1403                              rx, ry, rw, rh,
1404                              &fx, &fy, &fw, &fh))
1405                 {
1406                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1407                                         x + w - border, TRUE, border,
1408                                         fx, fy, fx + fw, fy + fh,
1409                                         r, g, b, a);
1410                 }
1411         if (util_clip_region(x + border, y, w - border * 2, border,
1412                              rx, ry, rw, rh,
1413                              &fx, &fy, &fw, &fh))
1414                 {
1415                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1416                                         y + border, FALSE, border,
1417                                         fx, fy, fx + fw, fy + fh,
1418                                         r, g, b, a);
1419                 }
1420         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1421                              rx, ry, rw, rh,
1422                              &fx, &fy, &fw, &fh))
1423                 {
1424                 pixbuf_draw_fade_linear(p_pix, prs, has_alpha,
1425                                         y + h - border, FALSE, border,
1426                                         fx, fy, fx + fw, fy + fh,
1427                                         r, g, b, a);
1428                 }
1429         if (util_clip_region(x, y, border, border,
1430                              rx, ry, rw, rh,
1431                              &fx, &fy, &fw, &fh))
1432                 {
1433                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1434                                         x + border, y + border, border,
1435                                         fx, fy, fx + fw, fy + fh,
1436                                         r, g, b, a);
1437                 }
1438         if (util_clip_region(x + w - border, y, border, border,
1439                              rx, ry, rw, rh,
1440                              &fx, &fy, &fw, &fh))
1441                 {
1442                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1443                                         x + w - border, y + border, border,
1444                                         fx, fy, fx + fw, fy + fh,
1445                                         r, g, b, a);
1446                 }
1447         if (util_clip_region(x, y + h - border, border, border,
1448                              rx, ry, rw, rh,
1449                              &fx, &fy, &fw, &fh))
1450                 {
1451                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1452                                         x + border, y + h - border, border,
1453                                         fx, fy, fx + fw, fy + fh,
1454                                         r, g, b, a);
1455                 }
1456         if (util_clip_region(x + w - border, y + h - border, border, border,
1457                              rx, ry, rw, rh,
1458                              &fx, &fy, &fw, &fh))
1459                 {
1460                 pixbuf_draw_fade_radius(p_pix, prs, has_alpha,
1461                                         x + w - border, y + h - border, border,
1462                                         fx, fy, fx + fw, fy + fh,
1463                                         r, g, b, a);
1464                 }
1465 }
1466
1467
1468 /*
1469  *-----------------------------------------------------------------------------
1470  * pixbuf color alterations
1471  *-----------------------------------------------------------------------------
1472  */
1473
1474 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1475                             gint x, gint y, gint w, gint h)
1476 {
1477         gboolean has_alpha;
1478         gint pw, ph, prs;
1479         guchar *p_pix;
1480         guchar *pp;
1481         gint i, j;
1482
1483         if (!pb) return;
1484
1485         pw = gdk_pixbuf_get_width(pb);
1486         ph = gdk_pixbuf_get_height(pb);
1487
1488         if (x < 0 || x + w > pw) return;
1489         if (y < 0 || y + h > ph) return;
1490
1491         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1492         prs = gdk_pixbuf_get_rowstride(pb);
1493         p_pix = gdk_pixbuf_get_pixels(pb);
1494
1495         for (i = 0; i < h; i++)
1496                 {
1497                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1498                 for (j = 0; j < w; j++)
1499                         {
1500                         guint8 grey;
1501
1502                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1503                         *pp = grey;
1504                         pp++;
1505                         *pp = grey;
1506                         pp++;
1507                         *pp = grey;
1508                         pp++;
1509                         if (has_alpha) pp++;
1510                         }
1511                 }
1512 }
1513
1514 /*
1515  *-----------------------------------------------------------------------------
1516  * pixbuf highlight under/over exposure *-----------------------------------------------------------------------------
1517  */
1518 void pixbuf_highlight_overunderexposed(GdkPixbuf *pb, gint x, gint y, gint w, gint h)
1519 {
1520         gboolean has_alpha;
1521         gint pw, ph, prs;
1522         guchar *p_pix;
1523         guchar *pp;
1524         gint i, j;
1525
1526         if (!pb) return;
1527
1528         pw = gdk_pixbuf_get_width(pb);
1529         ph = gdk_pixbuf_get_height(pb);
1530
1531         if (x < 0 || x + w > pw) return;
1532         if (y < 0 || y + h > ph) return;
1533
1534         has_alpha = gdk_pixbuf_get_has_alpha(pb);
1535         prs = gdk_pixbuf_get_rowstride(pb);
1536         p_pix = gdk_pixbuf_get_pixels(pb);
1537
1538         for (i = 0; i < h; i++)
1539                 {
1540                 pp = p_pix + (y + i) * prs + (x * (has_alpha ? 4 : 3));
1541                 for (j = 0; j < w; j++)
1542                         {
1543                         if (pp[0] == 255 || pp[1] == 255 || pp[2] == 255 || pp[0] == 0 || pp[1] == 0 || pp[2] == 0)
1544                                 {
1545                                 *pp = 255;
1546                                 pp++;
1547                                 *pp = 0;
1548                                 pp++;
1549                                 *pp = 0;
1550                                 pp++;
1551                                 if (has_alpha) pp++;
1552                                 }
1553                         else
1554                                 {
1555                                 pp = pp + 3;
1556                                 if (has_alpha) pp++;
1557                                 }
1558                         }
1559                 }
1560 }
1561
1562 /*
1563  *-----------------------------------------------------------------------------
1564  * pixbuf ignore alpha
1565  *-----------------------------------------------------------------------------
1566 */
1567 void pixbuf_ignore_alpha_rect(GdkPixbuf *pb,
1568                  gint x, gint y, gint w, gint h)
1569 {
1570    gboolean has_alpha;
1571    gint pw, ph, prs;
1572    guchar *p_pix;
1573    guchar *pp;
1574    gint i, j;
1575
1576    if (!pb) return;
1577
1578    pw = gdk_pixbuf_get_width(pb);
1579    ph = gdk_pixbuf_get_height(pb);
1580
1581    if (x < 0 || x + w > pw) return;
1582    if (y < 0 || y + h > ph) return;
1583
1584    has_alpha = gdk_pixbuf_get_has_alpha(pb);
1585    if (!has_alpha) return;
1586
1587    prs = gdk_pixbuf_get_rowstride(pb);
1588    p_pix = gdk_pixbuf_get_pixels(pb);
1589
1590    for (i = 0; i < h; i++)
1591        {
1592        pp = p_pix + (y + i) * prs + (x * 4 );
1593        for (j = 0; j < w; j++)
1594            {
1595            pp[3] = 0xff;
1596            pp+=4;
1597            }
1598        }
1599 }
1600 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */