src/renderer-tiles.cc

   1 /*
   2  * Copyright (C) 2006 John Ellis
   3  * Copyright (C) 2008 - 2021 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 <cmath>
  23 #include <cstdlib>
  24 #include <cstring>
  25
  26 #include "main.h"
  27 #include "renderer-tiles.h"
  28
  29 /* comment this out if not using this from within Geeqie
  30  * defining GQ_BUILD does these things:
  31  *   - Sets the shift-click scroller pixbuf to a nice icon instead of a black box
  32  */
  33 #define GQ_BUILD 1
  34
  35 #ifdef GQ_BUILD
  36 #include "main.h"
  37 #include "pixbuf-util.h"
  38 #include "exif.h"
  39 #else
  40 enum ExifOrientationType {
  41         EXIF_ORIENTATION_UNKNOWN        = 0,
  42         EXIF_ORIENTATION_TOP_LEFT       = 1,
  43         EXIF_ORIENTATION_TOP_RIGHT      = 2,
  44         EXIF_ORIENTATION_BOTTOM_RIGHT   = 3,
  45         EXIF_ORIENTATION_BOTTOM_LEFT    = 4,
  46         EXIF_ORIENTATION_LEFT_TOP       = 5,
  47         EXIF_ORIENTATION_RIGHT_TOP      = 6,
  48         EXIF_ORIENTATION_RIGHT_BOTTOM   = 7,
  49         EXIF_ORIENTATION_LEFT_BOTTOM    = 8
  50 };
  51 #endif
  52
  53 struct QueueData;
  54
  55 struct ImageTile
  56 {
  57         cairo_surface_t *surface;       /* off screen buffer */
  58         GdkPixbuf *pixbuf;      /* pixbuf area for zooming */
  59         gint x;                 /* x offset into image */
  60         gint y;                 /* y offset into image */
  61         gint w;                 /* width that is visible (may be less if at edge of image) */
  62         gint h;                 /* height '' */
  63
  64         gboolean blank;
  65
  66 /* render_todo: (explanation)
  67         NONE    do nothing
  68         AREA    render area of tile, usually only used when loading an image
  69                 note: will jump to an ALL if render_done is not ALL.
  70         ALL     render entire tile, if never done before w/ ALL, for expose events *only*
  71 */
  72
  73         ImageRenderType render_todo;    /* what to do (see above) */
  74         ImageRenderType render_done;    /* highest that has been done before on tile */
  75
  76         QueueData *qd;
  77         QueueData *qd2;
  78
  79         guint size;             /* est. memory used by pixmap and pixbuf */
  80 };
  81
  82 struct QueueData
  83 {
  84         ImageTile *it;
  85         gint x;
  86         gint y;
  87         gint w;
  88         gint h;
  89         gboolean new_data;
  90 };
  91
  92 struct OverlayData
  93 {
  94         gint id;
  95
  96         GdkPixbuf *pixbuf;
  97         GdkWindow *window;
  98
  99         gint x;
 100         gint y;
 101
 102         OverlayRendererFlags flags;
 103 };
 104
 105 struct RendererTiles
 106 {
 107         RendererFuncs f;
 108         PixbufRenderer *pr;
 109
 110         gint tile_cache_max;            /* max MiB to use for offscreen buffer */
 111
 112         gint tile_width;
 113         gint tile_height;
 114         gint tile_cols;         /* count of tile columns */
 115         GList *tiles;           /* list of buffer tiles */
 116         gint tile_cache_size;   /* allocated size of pixmaps/pixbufs */
 117         GList *draw_queue;      /* list of areas to redraw */
 118         GList *draw_queue_2pass;/* list when 2 pass is enabled */
 119
 120         GList *overlay_list;
 121         cairo_surface_t *overlay_buffer;
 122         cairo_surface_t *surface;
 123
 124         guint draw_idle_id; /* event source id */
 125
 126         GdkPixbuf *spare_tile;
 127
 128         gint stereo_mode;
 129         gint stereo_off_x;
 130         gint stereo_off_y;
 131
 132         gint x_scroll;  /* allow local adjustment and mirroring */
 133         gint y_scroll;
 134
 135         gint hidpi_scale;
 136 };
 137
 138
 139
 140 static void rt_border_draw(RendererTiles *rt, gint x, gint y, gint w, gint h);
 141 static void rt_overlay_draw(RendererTiles *rt, gint x, gint y, gint w, gint h, ImageTile *it);
 142
 143
 144 static void rt_tile_free_all(RendererTiles *rt);
 145 static void rt_tile_invalidate_region(RendererTiles *rt, gint x, gint y, gint w, gint h);
 146 static gboolean rt_tile_is_visible(RendererTiles *rt, ImageTile *it);
 147 static void rt_queue_clear(RendererTiles *rt);
 148 static void rt_queue_merge(QueueData *parent, QueueData *qd);
 149 static void rt_queue(RendererTiles *rt, gint x, gint y, gint w, gint h,
 150                      gint clamp, ImageRenderType render, gboolean new_data, gboolean only_existing);
 151
 152 static void rt_hierarchy_changed_cb(GtkWidget *widget, GtkWidget *previous_toplevel, gpointer data);
 153 static gint rt_queue_draw_idle_cb(gpointer data);
 154
 155 #define GET_RIGHT_PIXBUF_OFFSET(rt) \
 156         (( ((rt)->stereo_mode & PR_STEREO_RIGHT) && !((rt)->stereo_mode & PR_STEREO_SWAP)) || \
 157          (!((rt)->stereo_mode & PR_STEREO_RIGHT) &&  ((rt)->stereo_mode & PR_STEREO_SWAP)) ?  \
 158           (rt)->pr->stereo_pixbuf_offset_right : (rt)->pr->stereo_pixbuf_offset_left )
 159
 160 #define GET_LEFT_PIXBUF_OFFSET(rt) \
 161         ((!((rt)->stereo_mode & PR_STEREO_RIGHT) && !((rt)->stereo_mode & PR_STEREO_SWAP)) || \
 162          ( ((rt)->stereo_mode & PR_STEREO_RIGHT) &&  ((rt)->stereo_mode & PR_STEREO_SWAP)) ?  \
 163           (rt)->pr->stereo_pixbuf_offset_right : (rt)->pr->stereo_pixbuf_offset_left )
 164
 165
 166 static void rt_sync_scroll(RendererTiles *rt)
 167 {
 168         PixbufRenderer *pr = rt->pr;
 169
 170         rt->x_scroll = (rt->stereo_mode & PR_STEREO_MIRROR) ?
 171                        pr->width - pr->vis_width - pr->x_scroll
 172                        : pr->x_scroll;
 173
 174         rt->y_scroll = (rt->stereo_mode & PR_STEREO_FLIP) ?
 175                        pr->height - pr->vis_height - pr->y_scroll
 176                        : pr->y_scroll;
 177 }
 178
 179 /*
 180  *-------------------------------------------------------------------
 181  * borders
 182  *-------------------------------------------------------------------
 183  */
 184
 185 static void rt_border_draw(RendererTiles *rt, gint x, gint y, gint w, gint h)
 186 {
 187         PixbufRenderer *pr = rt->pr;
 188         GtkWidget *box;
 189         GdkWindow *window;
 190         gint rx, ry, rw, rh;
 191         cairo_t *cr;
 192
 193         box = GTK_WIDGET(pr);
 194         window = gtk_widget_get_window(box);
 195
 196         if (!window) return;
 197
 198         cr = cairo_create(rt->surface);
 199
 200         if (!pr->pixbuf && !pr->source_tiles_enabled)
 201                 {
 202                 if (pr_clip_region(x, y, w, h,
 203                                    0, 0,
 204                                    pr->viewport_width, pr->viewport_height,
 205                                    &rx, &ry, &rw, &rh))
 206                         {
 207                         cairo_set_source_rgb(cr, static_cast<double>(pr->color.red), static_cast<double>(pr->color.green), static_cast<double>(pr->color.blue));
 208                         cairo_rectangle(cr, rx + rt->stereo_off_x, ry + rt->stereo_off_y, rw, rh);
 209                         cairo_fill(cr);
 210                         rt_overlay_draw(rt, rx, ry, rw, rh, nullptr);
 211                         }
 212                 cairo_destroy(cr);
 213                 return;
 214                 }
 215
 216         if (pr->vis_width < pr->viewport_width)
 217                 {
 218                 if (pr->x_offset > 0 &&
 219                     pr_clip_region(x, y, w, h,
 220                                    0, 0,
 221                                    pr->x_offset, pr->viewport_height,
 222                                    &rx, &ry, &rw, &rh))
 223                         {
 224                         cairo_set_source_rgb(cr, static_cast<double>(pr->color.red), static_cast<double>(pr->color.green), static_cast<double>(pr->color.blue));
 225                         cairo_rectangle(cr, rx + rt->stereo_off_x, ry + rt->stereo_off_y, rw, rh);
 226                         cairo_fill(cr);
 227                         rt_overlay_draw(rt, rx, ry, rw, rh, nullptr);
 228                         }
 229                 if (pr->viewport_width - pr->vis_width - pr->x_offset > 0 &&
 230                     pr_clip_region(x, y, w, h,
 231                                    pr->x_offset + pr->vis_width, 0,
 232                                    pr->viewport_width - pr->vis_width - pr->x_offset, pr->viewport_height,
 233                                    &rx, &ry, &rw, &rh))
 234                         {
 235                         cairo_set_source_rgb(cr, static_cast<double>(pr->color.red), static_cast<double>(pr->color.green), static_cast<double>(pr->color.blue));
 236                         cairo_rectangle(cr, rx + rt->stereo_off_x, ry + rt->stereo_off_y, rw, rh);
 237                         cairo_fill(cr);
 238                         rt_overlay_draw(rt, rx, ry, rw, rh, nullptr);
 239                         }
 240                 }
 241         if (pr->vis_height < pr->viewport_height)
 242                 {
 243                 if (pr->y_offset > 0 &&
 244                     pr_clip_region(x, y, w, h,
 245                                    pr->x_offset, 0,
 246                                    pr->vis_width, pr->y_offset,
 247                                    &rx, &ry, &rw, &rh))
 248                         {
 249                         cairo_set_source_rgb(cr, static_cast<double>(pr->color.red), static_cast<double>(pr->color.green), static_cast<double>(pr->color.blue));
 250                         cairo_rectangle(cr, rx + rt->stereo_off_x, ry + rt->stereo_off_y, rw, rh);
 251                         cairo_fill(cr);
 252                         rt_overlay_draw(rt, rx, ry, rw, rh, nullptr);
 253                         }
 254                 if (pr->viewport_height - pr->vis_height - pr->y_offset > 0 &&
 255                     pr_clip_region(x, y, w, h,
 256                                    pr->x_offset, pr->y_offset + pr->vis_height,
 257                                    pr->vis_width, pr->viewport_height - pr->vis_height - pr->y_offset,
 258                                    &rx, &ry, &rw, &rh))
 259                         {
 260                         cairo_set_source_rgb(cr, static_cast<double>(pr->color.red), static_cast<double>(pr->color.green), static_cast<double>(pr->color.blue));
 261                         cairo_rectangle(cr, rx + rt->stereo_off_x, ry + rt->stereo_off_y, rw, rh);
 262                         cairo_fill(cr);
 263                         rt_overlay_draw(rt, rx, ry, rw, rh, nullptr);
 264                         }
 265                 }
 266         cairo_destroy(cr);
 267 }
 268
 269 static void rt_border_clear(RendererTiles *rt)
 270 {
 271         PixbufRenderer *pr = rt->pr;
 272         rt_border_draw(rt, 0, 0, pr->viewport_width, pr->viewport_height);
 273 }
 274
 275
 276 /*
 277  *-------------------------------------------------------------------
 278  * display tiles
 279  *-------------------------------------------------------------------
 280  */
 281
 282 static ImageTile *rt_tile_new(gint x, gint y, gint width, gint height)
 283 {
 284         auto it = g_new0(ImageTile, 1);
 285
 286         it->x = x;
 287         it->y = y;
 288         it->w = width;
 289         it->h = height;
 290
 291         it->render_done = TILE_RENDER_NONE;
 292
 293         return it;
 294 }
 295
 296 static void rt_tile_free(ImageTile *it)
 297 {
 298         if (!it) return;
 299
 300         if (it->pixbuf) g_object_unref(it->pixbuf);
 301         if (it->surface) cairo_surface_destroy(it->surface);
 302
 303         g_free(it);
 304 }
 305
 306 static void rt_tile_free_all(RendererTiles *rt)
 307 {
 308         g_list_free_full(rt->tiles, reinterpret_cast<GDestroyNotify>(rt_tile_free));
 309         rt->tiles = nullptr;
 310         rt->tile_cache_size = 0;
 311 }
 312
 313 static ImageTile *rt_tile_add(RendererTiles *rt, gint x, gint y)
 314 {
 315         PixbufRenderer *pr = rt->pr;
 316         ImageTile *it;
 317
 318         it = rt_tile_new(x, y, rt->tile_width, rt->tile_height);
 319
 320         if (it->x + it->w > pr->width) it->w = pr->width - it->x;
 321         if (it->y + it->h > pr->height) it->h = pr->height - it->y;
 322
 323         rt->tiles = g_list_prepend(rt->tiles, it);
 324         rt->tile_cache_size += it->size;
 325
 326         return it;
 327 }
 328
 329 static void rt_tile_remove(RendererTiles *rt, ImageTile *it)
 330 {
 331         if (it->qd)
 332                 {
 333                 QueueData *qd = it->qd;
 334
 335                 it->qd = nullptr;
 336                 rt->draw_queue = g_list_remove(rt->draw_queue, qd);
 337                 g_free(qd);
 338                 }
 339
 340         if (it->qd2)
 341                 {
 342                 QueueData *qd = it->qd2;
 343
 344                 it->qd2 = nullptr;
 345                 rt->draw_queue_2pass = g_list_remove(rt->draw_queue_2pass, qd);
 346                 g_free(qd);
 347                 }
 348
 349         rt->tiles = g_list_remove(rt->tiles, it);
 350         rt->tile_cache_size -= it->size;
 351
 352         rt_tile_free(it);
 353 }
 354
 355 static void rt_tile_free_space(RendererTiles *rt, guint space, ImageTile *it)
 356 {
 357         PixbufRenderer *pr = rt->pr;
 358         GList *work;
 359         guint tile_max;
 360
 361         work = g_list_last(rt->tiles);
 362
 363         if (pr->source_tiles_enabled && pr->scale < 1.0)
 364                 {
 365                 gint tiles;
 366
 367                 tiles = (pr->vis_width / rt->tile_width + 1) * (pr->vis_height / rt->tile_height + 1);
 368                 tile_max = MAX(tiles * rt->tile_width * rt->tile_height * 3,
 369                                (gint)((gdouble)rt->tile_cache_max * 1048576.0 * pr->scale));
 370                 }
 371         else
 372                 {
 373                 tile_max = rt->tile_cache_max * 1048576;
 374                 }
 375
 376         while (work && rt->tile_cache_size + space > tile_max)
 377                 {
 378                 ImageTile *needle;
 379
 380                 needle = static_cast<ImageTile *>(work->data);
 381                 work = work->prev;
 382                 if (needle != it &&
 383                     ((!needle->qd && !needle->qd2) || !rt_tile_is_visible(rt, needle))) rt_tile_remove(rt, needle);
 384                 }
 385 }
 386
 387 static void rt_tile_invalidate_all(RendererTiles *rt)
 388 {
 389         PixbufRenderer *pr = rt->pr;
 390         GList *work;
 391
 392         work = rt->tiles;
 393         while (work)
 394                 {
 395                 ImageTile *it;
 396
 397                 it = static_cast<ImageTile *>(work->data);
 398                 work = work->next;
 399
 400                 it->render_done = TILE_RENDER_NONE;
 401                 it->render_todo = TILE_RENDER_ALL;
 402                 it->blank = FALSE;
 403
 404                 it->w = MIN(rt->tile_width, pr->width - it->x);
 405                 it->h = MIN(rt->tile_height, pr->height - it->y);
 406                 }
 407 }
 408
 409 static void rt_tile_invalidate_region(RendererTiles *rt, gint x, gint y, gint w, gint h)
 410 {
 411         gint x1, x2;
 412         gint y1, y2;
 413         GList *work;
 414
 415         x1 = ROUND_DOWN(x, rt->tile_width);
 416         x2 = ROUND_UP(x + w, rt->tile_width);
 417
 418         y1 = ROUND_DOWN(y, rt->tile_height);
 419         y2 = ROUND_UP(y + h, rt->tile_height);
 420
 421         work = rt->tiles;
 422         while (work)
 423                 {
 424                 ImageTile *it;
 425
 426                 it = static_cast<ImageTile *>(work->data);
 427                 work = work->next;
 428
 429                 if (it->x < x2 && it->x + it->w > x1 &&
 430                     it->y < y2 && it->y + it->h > y1)
 431                         {
 432                         it->render_done = TILE_RENDER_NONE;
 433                         it->render_todo = TILE_RENDER_ALL;
 434                         }
 435                 }
 436 }
 437
 438 static ImageTile *rt_tile_get(RendererTiles *rt, gint x, gint y, gboolean only_existing)
 439 {
 440         GList *work;
 441
 442         work = rt->tiles;
 443         while (work)
 444                 {
 445                 ImageTile *it;
 446
 447                 it = static_cast<ImageTile *>(work->data);
 448                 if (it->x == x && it->y == y)
 449                         {
 450                         rt->tiles = g_list_delete_link(rt->tiles, work);
 451                         rt->tiles = g_list_prepend(rt->tiles, it);
 452                         return it;
 453                         }
 454
 455                 work = work->next;
 456                 }
 457
 458         if (only_existing) return nullptr;
 459
 460         return rt_tile_add(rt, x, y);
 461 }
 462
 463 static gint pixmap_calc_size(cairo_surface_t *)
 464 {
 465         return options->image.tile_size * options->image.tile_size * 4 / 8;
 466 }
 467
 468 static void rt_hidpi_aware_draw(
 469         RendererTiles *rt,
 470         cairo_t *cr,
 471         GdkPixbuf *pixbuf,
 472         double x,
 473         double y)
 474 {
 475         cairo_surface_t *surface;
 476         surface = gdk_cairo_surface_create_from_pixbuf(pixbuf, rt->hidpi_scale, nullptr);
 477         cairo_set_source_surface(cr, surface, x, y);
 478         cairo_fill(cr);
 479         cairo_surface_destroy(surface);
 480 }
 481
 482 static void rt_tile_prepare(RendererTiles *rt, ImageTile *it)
 483 {
 484         PixbufRenderer *pr = rt->pr;
 485         if (!it->surface)
 486                 {
 487                 cairo_surface_t *surface;
 488                 guint size;
 489
 490                 surface = gdk_window_create_similar_surface(gtk_widget_get_window(reinterpret_cast<GtkWidget *>(pr)),
 491                                                             CAIRO_CONTENT_COLOR,
 492                                                             rt->tile_width, rt->tile_height);
 493
 494                 size = pixmap_calc_size(surface) * rt->hidpi_scale * rt->hidpi_scale;
 495                 rt_tile_free_space(rt, size, it);
 496
 497                 it->surface = surface;
 498                 it->size += size;
 499                 rt->tile_cache_size += size;
 500                 }
 501
 502         if (!it->pixbuf)
 503                 {
 504                 GdkPixbuf *pixbuf;
 505                 guint size;
 506                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, rt->hidpi_scale * rt->tile_width, rt->hidpi_scale * rt->tile_height);
 507
 508                 size = gdk_pixbuf_get_rowstride(pixbuf) * rt->tile_height * rt->hidpi_scale;
 509                 rt_tile_free_space(rt, size, it);
 510
 511                 it->pixbuf = pixbuf;
 512                 it->size += size;
 513                 rt->tile_cache_size += size;
 514                 }
 515 }
 516
 517 /*
 518  *-------------------------------------------------------------------
 519  * overlays
 520  *-------------------------------------------------------------------
 521  */
 522
 523 static void rt_overlay_get_position(RendererTiles *rt, OverlayData *od,
 524                                     gint *x, gint *y, gint *w, gint *h)
 525 {
 526         PixbufRenderer *pr = rt->pr;
 527         gint px, py, pw, ph;
 528
 529         pw = gdk_pixbuf_get_width(od->pixbuf);
 530         ph = gdk_pixbuf_get_height(od->pixbuf);
 531         px = od->x;
 532         py = od->y;
 533
 534         if (od->flags & OVL_RELATIVE)
 535                 {
 536                 if (px < 0) px = pr->viewport_width - pw + px;
 537                 if (py < 0) py = pr->viewport_height - ph + py;
 538                 }
 539
 540         if (x) *x = px;
 541         if (y) *y = py;
 542         if (w) *w = pw;
 543         if (h) *h = ph;
 544 }
 545
 546 static void rt_overlay_init_window(RendererTiles *rt, OverlayData *od)
 547 {
 548         PixbufRenderer *pr = rt->pr;
 549         gint px, py, pw, ph;
 550         GdkWindowAttr attributes;
 551         gint attributes_mask;
 552
 553         rt_overlay_get_position(rt, od, &px, &py, &pw, &ph);
 554
 555         attributes.window_type = GDK_WINDOW_CHILD;
 556         attributes.wclass = GDK_INPUT_OUTPUT;
 557         attributes.width = pw;
 558         attributes.height = ph;
 559         attributes.event_mask = GDK_EXPOSURE_MASK;
 560         attributes_mask = 0;
 561
 562         od->window = gdk_window_new(gtk_widget_get_window(GTK_WIDGET(pr)), &attributes, attributes_mask);
 563         gdk_window_set_user_data(od->window, pr);
 564         gdk_window_move(od->window, px + rt->stereo_off_x, py + rt->stereo_off_y);
 565         gdk_window_show(od->window);
 566 }
 567
 568 static void rt_overlay_draw(RendererTiles *rt, gint x, gint y, gint w, gint h,
 569                             ImageTile *it)
 570 {
 571         PixbufRenderer *pr = rt->pr;
 572         GList *work;
 573
 574         work = rt->overlay_list;
 575         while (work)
 576                 {
 577                 OverlayData *od;
 578                 gint px, py, pw, ph;
 579                 gint rx, ry, rw, rh;
 580
 581                 od = static_cast<OverlayData *>(work->data);
 582                 work = work->next;
 583
 584                 if (!od->window) rt_overlay_init_window(rt, od);
 585
 586                 rt_overlay_get_position(rt, od, &px, &py, &pw, &ph);
 587                 if (pr_clip_region(x, y, w, h, px, py, pw, ph, &rx, &ry, &rw, &rh))
 588                         {
 589                         if (!rt->overlay_buffer)
 590                                 {
 591                                 rt->overlay_buffer = gdk_window_create_similar_surface(gtk_widget_get_window(reinterpret_cast<GtkWidget *>(pr)),
 592                                                             CAIRO_CONTENT_COLOR,
 593                                                             rt->tile_width, rt->tile_height);
 594                                 }
 595
 596                         if (it)
 597                                 {
 598                                 cairo_t *cr;
 599
 600                                 cr = cairo_create(rt->overlay_buffer);
 601                                 cairo_set_source_surface(cr, it->surface, (pr->x_offset + (it->x - rt->x_scroll)) - rx, (pr->y_offset + (it->y - rt->y_scroll)) - ry);
 602                                 cairo_rectangle(cr, 0, 0, rw, rh);
 603                                 cairo_fill_preserve(cr);
 604
 605                                 gdk_cairo_set_source_pixbuf(cr, od->pixbuf, px - rx, py - ry);
 606                                 cairo_fill(cr);
 607                                 cairo_destroy (cr);
 608
 609                                 cr = gdk_cairo_create(od->window);
 610                                 cairo_set_source_surface(cr, rt->overlay_buffer, rx - px, ry - py);
 611                                 cairo_rectangle (cr, rx - px, ry - py, rw, rh);
 612                                 cairo_fill (cr);
 613                                 cairo_destroy (cr);
 614                                 }
 615                         else
 616                                 {
 617                                 /* no ImageTile means region may be larger than our scratch buffer */
 618                                 gint sx, sy;
 619
 620                                 for (sx = rx; sx < rx + rw; sx += rt->tile_width)
 621                                     for (sy = ry; sy < ry + rh; sy += rt->tile_height)
 622                                         {
 623                                         gint sw, sh;
 624                                         cairo_t *cr;
 625
 626                                         sw = MIN(rx + rw - sx, rt->tile_width);
 627                                         sh = MIN(ry + rh - sy, rt->tile_height);
 628
 629                                         cr = cairo_create(rt->overlay_buffer);
 630                                         cairo_set_source_rgb(cr, 0, 0, 0);
 631                                         cairo_rectangle(cr, 0, 0, sw, sh);
 632                                         cairo_fill_preserve(cr);
 633
 634                                         gdk_cairo_set_source_pixbuf(cr, od->pixbuf, px - sx, py - sy);
 635                                         cairo_fill (cr);
 636                                         cairo_destroy (cr);
 637
 638                                         cr = gdk_cairo_create(od->window);
 639                                         cairo_set_source_surface(cr, rt->overlay_buffer, sx - px, sy - py);
 640                                         cairo_rectangle (cr, sx - px, sy - py, sw, sh);
 641                                         cairo_fill(cr);
 642                                         cairo_destroy(cr);
 643                                         }
 644                                 }
 645                         }
 646                 }
 647 }
 648
 649 static void rt_overlay_queue_draw(RendererTiles *rt, OverlayData *od, gint x1, gint y1, gint x2, gint y2)
 650 {
 651         PixbufRenderer *pr = rt->pr;
 652         gint x, y, w, h;
 653
 654         rt_overlay_get_position(rt, od, &x, &y, &w, &h);
 655
 656         /* add borders */
 657         x -= x1;
 658         y -= y1;
 659         w += x1 + x2;
 660         h += y1 + y2;
 661
 662         rt_queue(rt, rt->x_scroll - pr->x_offset + x,
 663                  rt->y_scroll - pr->y_offset + y,
 664                  w, h,
 665                  FALSE, TILE_RENDER_ALL, FALSE, FALSE);
 666
 667         rt_border_draw(rt, x, y, w, h);
 668 }
 669
 670 static void rt_overlay_queue_all(RendererTiles *rt, gint x1, gint y1, gint x2, gint y2)
 671 {
 672         GList *work;
 673
 674         work = rt->overlay_list;
 675         while (work)
 676                 {
 677                 auto od = static_cast<OverlayData *>(work->data);
 678                 work = work->next;
 679
 680                 rt_overlay_queue_draw(rt, od, x1, y1, x2, y2);
 681                 }
 682 }
 683
 684 static void rt_overlay_update_sizes(RendererTiles *rt)
 685 {
 686         GList *work;
 687
 688         work = rt->overlay_list;
 689         while (work)
 690                 {
 691                 auto od = static_cast<OverlayData *>(work->data);
 692                 work = work->next;
 693
 694                 if (!od->window) rt_overlay_init_window(rt, od);
 695
 696                 if (od->flags & OVL_RELATIVE)
 697                         {
 698                         gint x, y, w, h;
 699
 700                         rt_overlay_get_position(rt, od, &x, &y, &w, &h);
 701                         gdk_window_move_resize(od->window, x + rt->stereo_off_x, y + rt->stereo_off_y, w, h);
 702                         }
 703                 }
 704 }
 705
 706 static OverlayData *rt_overlay_find(RendererTiles *rt, gint id)
 707 {
 708         GList *work;
 709
 710         work = rt->overlay_list;
 711         while (work)
 712                 {
 713                 auto od = static_cast<OverlayData *>(work->data);
 714                 work = work->next;
 715
 716                 if (od->id == id) return od;
 717                 }
 718
 719         return nullptr;
 720 }
 721
 722
 723 gint renderer_tiles_overlay_add(void *renderer, GdkPixbuf *pixbuf, gint x, gint y,
 724                                  OverlayRendererFlags flags)
 725 {
 726         auto rt = static_cast<RendererTiles *>(renderer);
 727         PixbufRenderer *pr = rt->pr;
 728         gint id;
 729
 730         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), -1);
 731         g_return_val_if_fail(pixbuf != nullptr, -1);
 732
 733         id = 1;
 734         while (rt_overlay_find(rt, id)) id++;
 735
 736         auto od = g_new0(OverlayData, 1);
 737         od->id = id;
 738         od->pixbuf = pixbuf;
 739         g_object_ref(G_OBJECT(od->pixbuf));
 740         od->x = x;
 741         od->y = y;
 742         od->flags = flags;
 743
 744         rt_overlay_init_window(rt, od);
 745
 746         rt->overlay_list = g_list_append(rt->overlay_list, od);
 747
 748         gtk_widget_queue_draw(GTK_WIDGET(rt->pr));
 749
 750         return od->id;
 751 }
 752
 753 static void rt_overlay_free(RendererTiles *rt, OverlayData *od)
 754 {
 755         rt->overlay_list = g_list_remove(rt->overlay_list, od);
 756
 757         if (od->pixbuf) g_object_unref(G_OBJECT(od->pixbuf));
 758         if (od->window) gdk_window_destroy(od->window);
 759         g_free(od);
 760
 761         if (!rt->overlay_list && rt->overlay_buffer)
 762                 {
 763                 cairo_surface_destroy(rt->overlay_buffer);
 764                 rt->overlay_buffer = nullptr;
 765                 }
 766 }
 767
 768 static void rt_overlay_list_clear(RendererTiles *rt)
 769 {
 770         while (rt->overlay_list)
 771                 {
 772                 auto od = static_cast<OverlayData *>(rt->overlay_list->data);
 773                 rt_overlay_free(rt, od);
 774                 }
 775 }
 776
 777 static void rt_overlay_list_reset_window(RendererTiles *rt)
 778 {
 779         GList *work;
 780
 781         if (rt->overlay_buffer) cairo_surface_destroy(rt->overlay_buffer);
 782         rt->overlay_buffer = nullptr;
 783
 784         work = rt->overlay_list;
 785         while (work)
 786                 {
 787                 auto od = static_cast<OverlayData *>(work->data);
 788                 work = work->next;
 789                 if (od->window) gdk_window_destroy(od->window);
 790                 od->window = nullptr;
 791                 }
 792 }
 793
 794 void renderer_tiles_overlay_set(void *renderer, gint id, GdkPixbuf *pixbuf, gint, gint)
 795 {
 796         auto rc = static_cast<RendererTiles *>(renderer);
 797         PixbufRenderer *pr = rc->pr;
 798         OverlayData *od;
 799
 800         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
 801
 802         od = rt_overlay_find(rc, id);
 803         if (!od) return;
 804
 805         if (pixbuf)
 806                 {
 807                 g_object_ref(G_OBJECT(pixbuf));
 808                 g_object_unref(G_OBJECT(od->pixbuf));
 809                 od->pixbuf = pixbuf;
 810                 }
 811         else
 812                 {
 813                 rt_overlay_free(rc, od);
 814                 }
 815
 816         gtk_widget_queue_draw(GTK_WIDGET(rc->pr));
 817 }
 818
 819 gboolean renderer_tiles_overlay_get(void *renderer, gint id, GdkPixbuf **pixbuf, gint *x, gint *y)
 820 {
 821         auto rt = static_cast<RendererTiles *>(renderer);
 822         PixbufRenderer *pr = rt->pr;
 823         OverlayData *od;
 824
 825         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
 826
 827         od = rt_overlay_find(rt, id);
 828         if (!od) return FALSE;
 829
 830         if (pixbuf) *pixbuf = od->pixbuf;
 831         if (x) *x = od->x;
 832         if (y) *y = od->y;
 833
 834         return TRUE;
 835 }
 836
 837 static void rt_hierarchy_changed_cb(GtkWidget *, GtkWidget *, gpointer data)
 838 {
 839         auto rt = static_cast<RendererTiles *>(data);
 840         rt_overlay_list_reset_window(rt);
 841 }
 842
 843 /*
 844  *-------------------------------------------------------------------
 845  * drawing
 846  *-------------------------------------------------------------------
 847  */
 848
 849 static GdkPixbuf *rt_get_spare_tile(RendererTiles *rt)
 850 {
 851         if (!rt->spare_tile) rt->spare_tile = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, rt->tile_width * rt->hidpi_scale, rt->tile_height * rt->hidpi_scale);
 852         return rt->spare_tile;
 853 }
 854
 855 enum {
 856         COLOR_BYTES = 3 /* rgb */
 857 };
 858
 859 static void rt_tile_rotate_90_clockwise(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
 860 {
 861         GdkPixbuf *src = *tile;
 862         GdkPixbuf *dest;
 863         gint srs, drs;
 864         guchar *s_pix, *d_pix;
 865         guchar *sp, *dp;
 866         guchar *ip, *spi, *dpi;
 867         gint i, j;
 868         gint tw = rt->tile_width * rt->hidpi_scale;
 869
 870         srs = gdk_pixbuf_get_rowstride(src);
 871         s_pix = gdk_pixbuf_get_pixels(src);
 872         spi = s_pix + (x * COLOR_BYTES);
 873
 874         dest = rt_get_spare_tile(rt);
 875         drs = gdk_pixbuf_get_rowstride(dest);
 876         d_pix = gdk_pixbuf_get_pixels(dest);
 877         dpi = d_pix + (tw - 1) * COLOR_BYTES;
 878
 879         for (i = y; i < y + h; i++)
 880                 {
 881                 sp = spi + (i * srs);
 882                 ip = dpi - (i * COLOR_BYTES);
 883                 for (j = x; j < x + w; j++)
 884                         {
 885                         dp = ip + (j * drs);
 886                         memcpy(dp, sp, COLOR_BYTES);
 887                         sp += COLOR_BYTES;
 888                         }
 889                 }
 890
 891         rt->spare_tile = src;
 892         *tile = dest;
 893 }
 894
 895 static void rt_tile_rotate_90_counter_clockwise(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
 896 {
 897         GdkPixbuf *src = *tile;
 898         GdkPixbuf *dest;
 899         gint srs, drs;
 900         guchar *s_pix, *d_pix;
 901         guchar *sp, *dp;
 902         guchar *ip, *spi, *dpi;
 903         gint i, j;
 904         gint th = rt->tile_height * rt->hidpi_scale;
 905
 906         srs = gdk_pixbuf_get_rowstride(src);
 907         s_pix = gdk_pixbuf_get_pixels(src);
 908         spi = s_pix + (x * COLOR_BYTES);
 909
 910         dest = rt_get_spare_tile(rt);
 911         drs = gdk_pixbuf_get_rowstride(dest);
 912         d_pix = gdk_pixbuf_get_pixels(dest);
 913         dpi = d_pix + (th - 1) * drs;
 914
 915         for (i = y; i < y + h; i++)
 916                 {
 917                 sp = spi + (i * srs);
 918                 ip = dpi + (i * COLOR_BYTES);
 919                 for (j = x; j < x + w; j++)
 920                         {
 921                         dp = ip - (j * drs);
 922                         memcpy(dp, sp, COLOR_BYTES);
 923                         sp += COLOR_BYTES;
 924                         }
 925                 }
 926
 927         rt->spare_tile = src;
 928         *tile = dest;
 929 }
 930
 931 static void rt_tile_mirror_only(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
 932 {
 933         GdkPixbuf *src = *tile;
 934         GdkPixbuf *dest;
 935         gint srs, drs;
 936         guchar *s_pix, *d_pix;
 937         guchar *sp, *dp;
 938         guchar *spi, *dpi;
 939         gint i, j;
 940
 941         gint tw = rt->tile_width * rt->hidpi_scale;
 942
 943         srs = gdk_pixbuf_get_rowstride(src);
 944         s_pix = gdk_pixbuf_get_pixels(src);
 945         spi = s_pix + (x * COLOR_BYTES);
 946
 947         dest = rt_get_spare_tile(rt);
 948         drs = gdk_pixbuf_get_rowstride(dest);
 949         d_pix = gdk_pixbuf_get_pixels(dest);
 950         dpi =  d_pix + (tw - x - 1) * COLOR_BYTES;
 951
 952         for (i = y; i < y + h; i++)
 953                 {
 954                 sp = spi + (i * srs);
 955                 dp = dpi + (i * drs);
 956                 for (j = 0; j < w; j++)
 957                         {
 958                         memcpy(dp, sp, COLOR_BYTES);
 959                         sp += COLOR_BYTES;
 960                         dp -= COLOR_BYTES;
 961                         }
 962                 }
 963
 964         rt->spare_tile = src;
 965         *tile = dest;
 966 }
 967
 968 static void rt_tile_mirror_and_flip(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
 969 {
 970         GdkPixbuf *src = *tile;
 971         GdkPixbuf *dest;
 972         gint srs, drs;
 973         guchar *s_pix, *d_pix;
 974         guchar *sp, *dp;
 975         guchar *dpi;
 976         gint i, j;
 977         gint tw = rt->tile_width * rt->hidpi_scale;
 978         gint th = rt->tile_height * rt->hidpi_scale;
 979
 980         srs = gdk_pixbuf_get_rowstride(src);
 981         s_pix = gdk_pixbuf_get_pixels(src);
 982
 983         dest = rt_get_spare_tile(rt);
 984         drs = gdk_pixbuf_get_rowstride(dest);
 985         d_pix = gdk_pixbuf_get_pixels(dest);
 986         dpi = d_pix + (th - 1) * drs + (tw - 1) * COLOR_BYTES;
 987
 988         for (i = y; i < y + h; i++)
 989                 {
 990                 sp = s_pix + (i * srs) + (x * COLOR_BYTES);
 991                 dp = dpi - (i * drs) - (x * COLOR_BYTES);
 992                 for (j = 0; j < w; j++)
 993                         {
 994                         memcpy(dp, sp, COLOR_BYTES);
 995                         sp += COLOR_BYTES;
 996                         dp -= COLOR_BYTES;
 997                         }
 998                 }
 999
1000         rt->spare_tile = src;
1001         *tile = dest;
1002 }
1003
1004 static void rt_tile_flip_only(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
1005 {
1006         GdkPixbuf *src = *tile;
1007         GdkPixbuf *dest;
1008         gint srs, drs;
1009         guchar *s_pix, *d_pix;
1010         guchar *sp, *dp;
1011         guchar *spi, *dpi;
1012         gint i;
1013         gint th = rt->tile_height * rt->hidpi_scale;
1014
1015         srs = gdk_pixbuf_get_rowstride(src);
1016         s_pix = gdk_pixbuf_get_pixels(src);
1017         spi = s_pix + (x * COLOR_BYTES);
1018
1019         dest = rt_get_spare_tile(rt);
1020         drs = gdk_pixbuf_get_rowstride(dest);
1021         d_pix = gdk_pixbuf_get_pixels(dest);
1022         dpi = d_pix + (th - 1) * drs + (x * COLOR_BYTES);
1023
1024         for (i = y; i < y + h; i++)
1025                 {
1026                 sp = spi + (i * srs);
1027                 dp = dpi - (i * drs);
1028                 memcpy(dp, sp, w * COLOR_BYTES);
1029                 }
1030
1031         rt->spare_tile = src;
1032         *tile = dest;
1033 }
1034
1035 static void rt_tile_apply_orientation(RendererTiles *rt, gint orientation, GdkPixbuf **pixbuf, gint x, gint y, gint w, gint h)
1036 {
1037         switch (orientation)
1038                 {
1039                 case EXIF_ORIENTATION_TOP_LEFT:
1040                         /* normal -- nothing to do */
1041                         break;
1042                 case EXIF_ORIENTATION_TOP_RIGHT:
1043                         /* mirrored */
1044                         {
1045                                 rt_tile_mirror_only(rt, pixbuf, x, y, w, h);
1046                         }
1047                         break;
1048                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
1049                         /* upside down */
1050                         {
1051                                 rt_tile_mirror_and_flip(rt, pixbuf, x, y, w, h);
1052                         }
1053                         break;
1054                 case EXIF_ORIENTATION_BOTTOM_LEFT:
1055                         /* flipped */
1056                         {
1057                                 rt_tile_flip_only(rt, pixbuf, x, y, w, h);
1058                         }
1059                         break;
1060                 case EXIF_ORIENTATION_LEFT_TOP:
1061                         {
1062                                 rt_tile_flip_only(rt, pixbuf, x, y, w, h);
1063                                 rt_tile_rotate_90_clockwise(rt, pixbuf, x, rt->tile_height - y - h, w, h);
1064                         }
1065                         break;
1066                 case EXIF_ORIENTATION_RIGHT_TOP:
1067                         /* rotated -90 (270) */
1068                         {
1069                                 rt_tile_rotate_90_clockwise(rt, pixbuf, x, y, w, h);
1070                         }
1071                         break;
1072                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
1073                         {
1074                                 rt_tile_flip_only(rt, pixbuf, x, y, w, h);
1075                                 rt_tile_rotate_90_counter_clockwise(rt, pixbuf, x, rt->tile_height - y - h, w, h);
1076                         }
1077                         break;
1078                 case EXIF_ORIENTATION_LEFT_BOTTOM:
1079                         /* rotated 90 */
1080                         {
1081                                 rt_tile_rotate_90_counter_clockwise(rt, pixbuf, x, y, w, h);
1082                         }
1083                         break;
1084                 default:
1085                         /* The other values are out of range */
1086                         break;
1087                 }
1088 }
1089
1090 static gboolean rt_source_tile_render(RendererTiles *rt, ImageTile *it,
1091                                       gint x, gint y, gint w, gint h,
1092                                       gboolean, gboolean fast)
1093 {
1094         PixbufRenderer *pr = rt->pr;
1095         GList *list;
1096         GList *work;
1097         gboolean draw = FALSE;
1098
1099         if (pr->zoom == 1.0 || pr->scale == 1.0)
1100                 {
1101                 list = pr_source_tile_compute_region(pr, it->x + x, it->y + y, w, h, TRUE);
1102                 work = list;
1103                 while (work)
1104                         {
1105                         SourceTile *st;
1106                         gint rx, ry, rw, rh;
1107
1108                         st = static_cast<SourceTile *>(work->data);
1109                         work = work->next;
1110
1111                         if (pr_clip_region(st->x, st->y, pr->source_tile_width, pr->source_tile_height,
1112                                            it->x + x, it->y + y, w, h,
1113                                            &rx, &ry, &rw, &rh))
1114                                 {
1115                                 cairo_t *cr;
1116                                 cr = cairo_create(it->surface);
1117                                 cairo_rectangle (cr, rx - it->x, ry - it->y, rw, rh);
1118
1119                                 if (st->blank)
1120                                         {
1121                                         cairo_set_source_rgb(cr, 0, 0, 0);
1122                                         cairo_fill (cr);
1123                                         }
1124                                 else /* (pr->zoom == 1.0 || pr->scale == 1.0) */
1125                                         {
1126                                         rt_hidpi_aware_draw(rt, cr, st->pixbuf, -it->x + st->x, -it->y + st->y);
1127                                         }
1128                                 cairo_destroy (cr);
1129                                 }
1130                         }
1131                 }
1132         else
1133                 {
1134                 gdouble scale_x, scale_y;
1135                 gint sx, sy, sw, sh;
1136
1137                 if (pr->image_width == 0 || pr->image_height == 0) return FALSE;
1138                 scale_x = static_cast<gdouble>(pr->width) / pr->image_width;
1139                 scale_y = static_cast<gdouble>(pr->height) / pr->image_height;
1140
1141                 sx = static_cast<gdouble>(it->x + x) / scale_x;
1142                 sy = static_cast<gdouble>(it->y + y) / scale_y;
1143                 sw = static_cast<gdouble>(w) / scale_x;
1144                 sh = static_cast<gdouble>(h) / scale_y;
1145
1146                 if (pr->width < PR_MIN_SCALE_SIZE || pr->height < PR_MIN_SCALE_SIZE) fast = TRUE;
1147
1148 #if 0
1149                 /* draws red over draw region, to check for leaks (regions not filled) */
1150                 pixbuf_set_rect_fill(it->pixbuf, x, y, w, h, 255, 0, 0, 255);
1151 #endif
1152
1153                 list = pr_source_tile_compute_region(pr, sx, sy, sw, sh, TRUE);
1154                 work = list;
1155                 while (work)
1156                         {
1157                         SourceTile *st;
1158                         gint rx, ry, rw, rh;
1159                         gint stx, sty, stw, sth;
1160
1161                         st = static_cast<SourceTile *>(work->data);
1162                         work = work->next;
1163
1164                         stx = floor(static_cast<gdouble>(st->x) * scale_x);
1165                         sty = floor(static_cast<gdouble>(st->y) * scale_y);
1166                         stw = ceil(static_cast<gdouble>(st->x + pr->source_tile_width) * scale_x) - stx;
1167                         sth = ceil(static_cast<gdouble>(st->y + pr->source_tile_height) * scale_y) - sty;
1168
1169                         if (pr_clip_region(stx, sty, stw, sth,
1170                                            it->x + x, it->y + y, w, h,
1171                                            &rx, &ry, &rw, &rh))
1172                                 {
1173
1174                                 if (st->blank)
1175                                         {
1176                                         cairo_t *cr;
1177                                         cr = cairo_create(it->surface);
1178                                         cairo_rectangle (cr, rx - st->x, ry - st->y, rw, rh);
1179                                         cairo_set_source_rgb(cr, 0, 0, 0);
1180                                         cairo_fill (cr);
1181                                         cairo_destroy (cr);
1182                                         }
1183                                 else
1184                                         {
1185                                         gdouble offset_x;
1186                                         gdouble offset_y;
1187
1188                                         /* may need to use unfloored stx,sty values here */
1189                                         offset_x = static_cast<gdouble>(stx - it->x);
1190                                         offset_y = static_cast<gdouble>(sty - it->y);
1191
1192                                         gdk_pixbuf_scale(st->pixbuf, it->pixbuf, rx - it->x, ry - it->y, rw, rh,
1193                                                  static_cast<gdouble>(0.0) + offset_x,
1194                                                  static_cast<gdouble>(0.0) + offset_y,
1195                                                  scale_x, scale_y,
1196                                                  (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality);
1197                                         draw = TRUE;
1198                                         }
1199                                 }
1200                         }
1201                 }
1202
1203         g_list_free(list);
1204
1205         return draw;
1206 }
1207
1208 /**
1209  * @brief
1210  * @param has_alpha
1211  * @param ignore_alpha
1212  * @param src
1213  * @param dest
1214  * @param pb_x
1215  * @param pb_y
1216  * @param pb_w
1217  * @param pb_h
1218  * @param offset_x
1219  * @param offset_y
1220  * @param scale_x
1221  * @param scale_y
1222  * @param interp_type
1223  * @param check_x
1224  * @param check_y
1225  * @param wide_image Used as a work-around for a GdkPixbuf problem. Set when image width is > 32767. Problem exhibited with gdk_pixbuf_copy_area() and GDK_INTERP_NEAREST. See #772 on GitHub Geeqie
1226  *
1227  *
1228  */
1229 static void rt_tile_get_region(gboolean has_alpha, gboolean ignore_alpha,
1230                                const GdkPixbuf *src, GdkPixbuf *dest,
1231                                int pb_x, int pb_y, int pb_w, int pb_h,
1232                                double offset_x, double offset_y, double scale_x, double scale_y,
1233                                GdkInterpType interp_type,
1234                                int check_x, int check_y, gboolean wide_image)
1235 {
1236         GdkPixbuf* tmppixbuf;
1237         gint srs;
1238         gint drs;
1239         gint x;
1240         gint y;
1241         gint c;
1242         guchar *psrc;
1243         guchar *pdst;
1244         guint32 red_1;
1245         guint32 green_1;
1246         guint32 blue_1;
1247         guint32 red_2;
1248         guint32 green_2;
1249         guint32 blue_2;
1250         guint32 alpha_1;
1251         guint32 alpha_2;
1252
1253         if (!has_alpha)
1254                 {
1255                 if (scale_x == 1.0 && scale_y == 1.0)
1256                         {
1257                         if (wide_image)
1258                                 {
1259                                 srs = gdk_pixbuf_get_rowstride(src);
1260                                 drs = gdk_pixbuf_get_rowstride(dest);
1261                                 psrc = gdk_pixbuf_get_pixels(src);
1262                                 pdst = gdk_pixbuf_get_pixels(dest);
1263                                 for (y = 0; y < pb_h; y++)
1264                                         {
1265                                         for (x = 0; x < pb_w; x++)
1266                                                 {
1267                                                 for (c = 0; c < 3; c++)
1268                                                         {
1269                                                         pdst[(y * drs) + x*3 + c] = psrc[(-static_cast<int>(offset_y) + pb_y + y) * srs + (-static_cast<int>(offset_x) + pb_x+x)*3 + c];
1270                                                         }
1271                                                 }
1272                                         }
1273                                 }
1274                         else
1275                                 {
1276                                 gdk_pixbuf_copy_area(src,
1277                                                                         -offset_x + pb_x, -offset_y + pb_y,
1278                                                                         pb_w, pb_h,
1279                                                                         dest,
1280                                                                         pb_x, pb_y);
1281                                         }
1282                         }
1283                 else
1284                         {
1285                         gdk_pixbuf_scale(src, dest,
1286                                                         pb_x, pb_y, pb_w, pb_h,
1287                                                         offset_x,
1288                                                         offset_y,
1289                                                         scale_x, scale_y,
1290                                                         (wide_image && interp_type == GDK_INTERP_NEAREST) ? GDK_INTERP_TILES : interp_type);
1291                         }
1292                 }
1293         else
1294                 {
1295                 red_1=static_cast<guint32>(options->image.alpha_color_1.red * 255) << 16 & 0x00FF0000;
1296                 green_1=static_cast<guint32>(options->image.alpha_color_1.green * 255) << 8 & 0x0000FF00;
1297                 blue_1=static_cast<guint32>(options->image.alpha_color_1.blue * 255) & 0x000000FF;
1298                 red_2=static_cast<guint32>(options->image.alpha_color_2.red * 255) << 16 & 0x00FF0000;
1299                 green_2=static_cast<guint32>(options->image.alpha_color_2.green * 255) << 8 & 0x0000FF00;
1300                 blue_2=static_cast<guint32>(options->image.alpha_color_2.blue * 255) & 0x000000FF;
1301                 alpha_1 = red_1 + green_1 + blue_1;
1302                 alpha_2 = red_2 + green_2 + blue_2;
1303
1304                 if (ignore_alpha)
1305                         {
1306                         tmppixbuf = gdk_pixbuf_add_alpha(src, FALSE, 0, 0, 0);
1307
1308                         pixbuf_ignore_alpha_rect(tmppixbuf, 0, 0, gdk_pixbuf_get_width(src), gdk_pixbuf_get_height(src));
1309
1310                         gdk_pixbuf_composite_color(tmppixbuf, dest,
1311                                         pb_x, pb_y, pb_w, pb_h,
1312                                         offset_x,
1313                                         offset_y,
1314                                         scale_x, scale_y,
1315                                         (scale_x == 1.0 && scale_y == 1.0) ? GDK_INTERP_NEAREST : interp_type,
1316                                         255, check_x, check_y,
1317                                         PR_ALPHA_CHECK_SIZE,
1318                                         alpha_1,
1319                                         alpha_2);
1320                         g_object_unref(tmppixbuf);
1321                         }
1322                 else
1323                         {
1324                         gdk_pixbuf_composite_color(src, dest,
1325                                         pb_x, pb_y, pb_w, pb_h,
1326                                         offset_x,
1327                                         offset_y,
1328                                         scale_x, scale_y,
1329                                         (scale_x == 1.0 && scale_y == 1.0) ? GDK_INTERP_NEAREST : interp_type,
1330                                         255, check_x, check_y,
1331                                         PR_ALPHA_CHECK_SIZE,
1332                                         alpha_1,
1333                                         alpha_2);
1334                         }
1335                 }
1336 }
1337
1338
1339 static gint rt_get_orientation(RendererTiles *rt)
1340 {
1341         PixbufRenderer *pr = rt->pr;
1342
1343         gint orientation = pr->orientation;
1344         static const gint mirror[]       = {1,   2, 1, 4, 3, 6, 5, 8, 7};
1345         static const gint flip[]         = {1,   4, 3, 2, 1, 8, 7, 6, 5};
1346
1347         if (rt->stereo_mode & PR_STEREO_MIRROR) orientation = mirror[orientation];
1348         if (rt->stereo_mode & PR_STEREO_FLIP) orientation = flip[orientation];
1349         return orientation;
1350 }
1351
1352
1353 static void rt_tile_render(RendererTiles *rt, ImageTile *it,
1354                            gint x, gint y, gint w, gint h,
1355                            gboolean new_data, gboolean fast)
1356 {
1357         PixbufRenderer *pr = rt->pr;
1358         gboolean has_alpha;
1359         gboolean draw = FALSE;
1360         gint orientation = rt_get_orientation(rt);
1361         gboolean wide_image = FALSE;
1362
1363         if (it->render_todo == TILE_RENDER_NONE && it->surface && !new_data) return;
1364
1365         if (it->render_done != TILE_RENDER_ALL)
1366                 {
1367                 x = 0;
1368                 y = 0;
1369                 w = it->w;
1370                 h = it->h;
1371                 if (!fast) it->render_done = TILE_RENDER_ALL;
1372                 }
1373         else if (it->render_todo != TILE_RENDER_AREA)
1374                 {
1375                 if (!fast) it->render_todo = TILE_RENDER_NONE;
1376                 return;
1377                 }
1378
1379         if (!fast) it->render_todo = TILE_RENDER_NONE;
1380
1381         if (new_data) it->blank = FALSE;
1382
1383         rt_tile_prepare(rt, it);
1384         has_alpha = (pr->pixbuf && gdk_pixbuf_get_has_alpha(pr->pixbuf));
1385
1386         /** @FIXME checker colors for alpha should be configurable,
1387          * also should be drawn for blank = TRUE
1388          */
1389
1390         if (it->blank)
1391                 {
1392                 /* no data, do fast rect fill */
1393                 cairo_t *cr;
1394                 cr = cairo_create(it->surface);
1395                 cairo_rectangle (cr, 0, 0, it->w, it->h);
1396                 cairo_set_source_rgb(cr, 0, 0, 0);
1397                 cairo_fill (cr);
1398                 cairo_destroy (cr);
1399                 }
1400         else if (pr->source_tiles_enabled)
1401                 {
1402                 draw = rt_source_tile_render(rt, it, x, y, w, h, new_data, fast);
1403                 }
1404         else
1405                 {
1406                 gdouble scale_x, scale_y;
1407                 gdouble src_x, src_y;
1408                 gint pb_x, pb_y;
1409                 gint pb_w, pb_h;
1410
1411                 if (pr->image_width == 0 || pr->image_height == 0) return;
1412
1413                 scale_x = rt->hidpi_scale * static_cast<gdouble>(pr->width) / pr->image_width;
1414                 scale_y = rt->hidpi_scale * static_cast<gdouble>(pr->height) / pr->image_height;
1415
1416                 pr_tile_coords_map_orientation(orientation, it->x, it->y,
1417                                             pr->width, pr->height,
1418                                             rt->tile_width, rt->tile_height,
1419                                             &src_x, &src_y);
1420                 pr_tile_region_map_orientation(orientation, x, y,
1421                                             rt->tile_width, rt->tile_height,
1422                                             w, h,
1423                                             &pb_x, &pb_y,
1424                                             &pb_w, &pb_h);
1425
1426                 src_x *= rt->hidpi_scale;
1427                 src_y *= rt->hidpi_scale;
1428                 pb_x *= rt->hidpi_scale;
1429                 pb_y *= rt->hidpi_scale;
1430                 pb_w *= rt->hidpi_scale;
1431                 pb_h *= rt->hidpi_scale;
1432
1433                 switch (orientation)
1434                         {
1435                         gdouble tmp;
1436                         case EXIF_ORIENTATION_LEFT_TOP:
1437                         case EXIF_ORIENTATION_RIGHT_TOP:
1438                         case EXIF_ORIENTATION_RIGHT_BOTTOM:
1439                         case EXIF_ORIENTATION_LEFT_BOTTOM:
1440                                 tmp = scale_x;
1441                                 scale_x = scale_y;
1442                                 scale_y = tmp;
1443                                 break;
1444                         default:
1445                                 /* nothing to do */
1446                                 break;
1447                         }
1448
1449                 /* HACK: The pixbuf scalers get kinda buggy(crash) with extremely
1450                  * small sizes for anything but GDK_INTERP_NEAREST
1451                  */
1452                 if (pr->width < PR_MIN_SCALE_SIZE || pr->height < PR_MIN_SCALE_SIZE) fast = TRUE;
1453                 if (pr->image_width > 32767) wide_image = TRUE;
1454
1455                 rt_tile_get_region(has_alpha, pr->ignore_alpha,
1456                                    pr->pixbuf, it->pixbuf, pb_x, pb_y, pb_w, pb_h,
1457                                    static_cast<gdouble>(0.0) - src_x - GET_RIGHT_PIXBUF_OFFSET(rt) * scale_x,
1458                                    static_cast<gdouble>(0.0) - src_y,
1459                                    scale_x, scale_y,
1460                                    (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality,
1461                                    it->x + pb_x, it->y + pb_y, wide_image);
1462                 if (rt->stereo_mode & PR_STEREO_ANAGLYPH &&
1463                     (pr->stereo_pixbuf_offset_right > 0 || pr->stereo_pixbuf_offset_left > 0))
1464                         {
1465                         GdkPixbuf *right_pb = rt_get_spare_tile(rt);
1466                         rt_tile_get_region(has_alpha, pr->ignore_alpha,
1467                                            pr->pixbuf, right_pb, pb_x, pb_y, pb_w, pb_h,
1468                                            static_cast<gdouble>(0.0) - src_x - GET_LEFT_PIXBUF_OFFSET(rt) * scale_x,
1469                                            static_cast<gdouble>(0.0) - src_y,
1470                                            scale_x, scale_y,
1471                                            (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality,
1472                                            it->x + pb_x, it->y + pb_y, wide_image);
1473                         pr_create_anaglyph(rt->stereo_mode, it->pixbuf, right_pb, pb_x, pb_y, pb_w, pb_h);
1474                         /* do not care about freeing spare_tile, it will be reused */
1475                         }
1476                 rt_tile_apply_orientation(rt, orientation, &it->pixbuf, pb_x, pb_y, pb_w, pb_h);
1477                 draw = TRUE;
1478                 }
1479
1480         if (draw && it->pixbuf && !it->blank)
1481                 {
1482                 cairo_t *cr;
1483
1484                 if (pr->func_post_process && !(pr->post_process_slow && fast))
1485                         pr->func_post_process(pr, &it->pixbuf, x, y, w, h, pr->post_process_user_data);
1486
1487                 cr = cairo_create(it->surface);
1488                 cairo_rectangle (cr, x, y, w, h);
1489                 rt_hidpi_aware_draw(rt, cr, it->pixbuf, 0, 0);
1490                 cairo_destroy (cr);
1491                 }
1492 }
1493
1494
1495 static void rt_tile_expose(RendererTiles *rt, ImageTile *it,
1496                            gint x, gint y, gint w, gint h,
1497                            gboolean new_data, gboolean fast)
1498 {
1499         PixbufRenderer *pr = rt->pr;
1500         cairo_t *cr;
1501
1502         /* clamp to visible */
1503         if (it->x + x < rt->x_scroll)
1504                 {
1505                 w -= rt->x_scroll - it->x - x;
1506                 x = rt->x_scroll - it->x;
1507                 }
1508         if (it->x + x + w > rt->x_scroll + pr->vis_width)
1509                 {
1510                 w = rt->x_scroll + pr->vis_width - it->x - x;
1511                 }
1512         if (w < 1) return;
1513         if (it->y + y < rt->y_scroll)
1514                 {
1515                 h -= rt->y_scroll - it->y - y;
1516                 y = rt->y_scroll - it->y;
1517                 }
1518         if (it->y + y + h > rt->y_scroll + pr->vis_height)
1519                 {
1520                 h = rt->y_scroll + pr->vis_height - it->y - y;
1521                 }
1522         if (h < 1) return;
1523
1524         rt_tile_render(rt, it, x, y, w, h, new_data, fast);
1525
1526         cr = cairo_create(rt->surface);
1527         cairo_set_source_surface(cr, it->surface, pr->x_offset + (it->x - rt->x_scroll) + rt->stereo_off_x, pr->y_offset + (it->y - rt->y_scroll) + rt->stereo_off_y);
1528         cairo_rectangle (cr, pr->x_offset + (it->x - rt->x_scroll) + x + rt->stereo_off_x, pr->y_offset + (it->y - rt->y_scroll) + y + rt->stereo_off_y, w, h);
1529         cairo_fill (cr);
1530         cairo_destroy (cr);
1531
1532         if (rt->overlay_list)
1533                 {
1534                 rt_overlay_draw(rt, pr->x_offset + (it->x - rt->x_scroll) + x,
1535                                 pr->y_offset + (it->y - rt->y_scroll) + y,
1536                                 w, h,
1537                                 it);
1538                 }
1539
1540         gtk_widget_queue_draw(GTK_WIDGET(rt->pr));
1541 }
1542
1543
1544 static gboolean rt_tile_is_visible(RendererTiles *rt, ImageTile *it)
1545 {
1546         PixbufRenderer *pr = rt->pr;
1547         return (it->x + it->w >= rt->x_scroll && it->x < rt->x_scroll + pr->vis_width &&
1548                 it->y + it->h >= rt->y_scroll && it->y < rt->y_scroll + pr->vis_height);
1549 }
1550
1551 /*
1552  *-------------------------------------------------------------------
1553  * draw queue
1554  *-------------------------------------------------------------------
1555  */
1556
1557 static gint rt_get_queued_area(GList *work)
1558 {
1559         gint area = 0;
1560
1561         while (work)
1562                 {
1563                 auto qd = static_cast<QueueData *>(work->data);
1564                 area += qd->w * qd->h;
1565                 work = work->next;
1566                 }
1567         return area;
1568 }
1569
1570
1571 static gboolean rt_queue_schedule_next_draw(RendererTiles *rt, gboolean force_set)
1572 {
1573         PixbufRenderer *pr = rt->pr;
1574         gfloat percent;
1575         gint visible_area = pr->vis_width * pr->vis_height;
1576
1577         if (!pr->loading)
1578                 {
1579                 /* 2pass prio */
1580                 DEBUG_2("redraw priority: 2pass");
1581                 rt->draw_idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, rt_queue_draw_idle_cb, rt, nullptr);
1582                 return G_SOURCE_REMOVE;
1583                 }
1584
1585         if (visible_area == 0)
1586                 {
1587                 /* not known yet */
1588                 percent = 100.0;
1589                 }
1590         else
1591                 {
1592                 percent = 100.0 * rt_get_queued_area(rt->draw_queue) / visible_area;
1593                 }
1594
1595         if (percent > 10.0)
1596                 {
1597                 /* we have enough data for starting intensive redrawing */
1598                 DEBUG_2("redraw priority: high %.2f %%", percent);
1599                 rt->draw_idle_id = g_idle_add_full(GDK_PRIORITY_REDRAW, rt_queue_draw_idle_cb, rt, nullptr);
1600                 return G_SOURCE_REMOVE;
1601                 }
1602
1603         if (percent < 1.0 || force_set)
1604                 {
1605                 /* queue is (almost) empty, wait  50 ms*/
1606                 DEBUG_2("redraw priority: wait %.2f %%", percent);
1607                 rt->draw_idle_id = g_timeout_add_full(G_PRIORITY_DEFAULT_IDLE, 50, rt_queue_draw_idle_cb, rt, nullptr);
1608                 return G_SOURCE_REMOVE;
1609                 }
1610
1611         /* keep the same priority as before */
1612         DEBUG_2("redraw priority: no change %.2f %%", percent);
1613         return G_SOURCE_CONTINUE;
1614 }
1615
1616
1617 static gboolean rt_queue_draw_idle_cb(gpointer data)
1618 {
1619         auto rt = static_cast<RendererTiles *>(data);
1620         PixbufRenderer *pr = rt->pr;
1621         QueueData *qd;
1622         gboolean fast;
1623
1624
1625         if ((!pr->pixbuf && !pr->source_tiles_enabled) ||
1626             (!rt->draw_queue && !rt->draw_queue_2pass) ||
1627             !rt->draw_idle_id)
1628                 {
1629                 pr_render_complete_signal(pr);
1630
1631                 rt->draw_idle_id = 0;
1632                 return G_SOURCE_REMOVE;
1633                 }
1634
1635         if (rt->draw_queue)
1636                 {
1637                 qd = static_cast<QueueData *>(rt->draw_queue->data);
1638                 fast = (pr->zoom_2pass && ((pr->zoom_quality != GDK_INTERP_NEAREST && pr->scale != 1.0) || pr->post_process_slow));
1639                 }
1640         else
1641                 {
1642                 if (pr->loading)
1643                         {
1644                         /* still loading, wait till done (also drops the higher priority) */
1645
1646                         return rt_queue_schedule_next_draw(rt, FALSE);
1647                         }
1648
1649                 qd = static_cast<QueueData *>(rt->draw_queue_2pass->data);
1650                 fast = FALSE;
1651                 }
1652
1653         if (gtk_widget_get_realized(GTK_WIDGET(pr)))
1654                 {
1655                 if (rt_tile_is_visible(rt, qd->it))
1656                         {
1657                         rt_tile_expose(rt, qd->it, qd->x, qd->y, qd->w, qd->h, qd->new_data, fast);
1658                         }
1659                 else if (qd->new_data)
1660                         {
1661                         /* if new pixel data, and we already have a pixmap, update the tile */
1662                         qd->it->blank = FALSE;
1663                         if (qd->it->surface && qd->it->render_done == TILE_RENDER_ALL)
1664                                 {
1665                                 rt_tile_render(rt, qd->it, qd->x, qd->y, qd->w, qd->h, qd->new_data, fast);
1666                                 }
1667                         }
1668                 }
1669
1670         if (rt->draw_queue)
1671                 {
1672                 qd->it->qd = nullptr;
1673                 rt->draw_queue = g_list_remove(rt->draw_queue, qd);
1674                 if (fast)
1675                         {
1676                         if (qd->it->qd2)
1677                                 {
1678                                 rt_queue_merge(qd->it->qd2, qd);
1679                                 g_free(qd);
1680                                 }
1681                         else
1682                                 {
1683                                 qd->it->qd2 = qd;
1684                                 rt->draw_queue_2pass = g_list_append(rt->draw_queue_2pass, qd);
1685                                 }
1686                         }
1687                 else
1688                         {
1689                         g_free(qd);
1690                         }
1691                 }
1692         else
1693                 {
1694                 qd->it->qd2 = nullptr;
1695                 rt->draw_queue_2pass = g_list_remove(rt->draw_queue_2pass, qd);
1696                 g_free(qd);
1697                 }
1698
1699         if (!rt->draw_queue && !rt->draw_queue_2pass)
1700                 {
1701                 pr_render_complete_signal(pr);
1702
1703                 rt->draw_idle_id = 0;
1704                 return G_SOURCE_REMOVE;
1705                 }
1706
1707                 return rt_queue_schedule_next_draw(rt, FALSE);
1708 }
1709
1710 static void rt_queue_list_free(GList *list)
1711 {
1712         GList *work;
1713
1714         work = list;
1715         while (work)
1716                 {
1717                 QueueData *qd;
1718
1719                 qd = static_cast<QueueData *>(work->data);
1720                 work = work->next;
1721
1722                 qd->it->qd = nullptr;
1723                 qd->it->qd2 = nullptr;
1724                 g_free(qd);
1725                 }
1726
1727         g_list_free(list);
1728 }
1729
1730 static void rt_queue_clear(RendererTiles *rt)
1731 {
1732         rt_queue_list_free(rt->draw_queue);
1733         rt->draw_queue = nullptr;
1734
1735         rt_queue_list_free(rt->draw_queue_2pass);
1736         rt->draw_queue_2pass = nullptr;
1737
1738         if (rt->draw_idle_id)
1739                 {
1740                 g_source_remove(rt->draw_idle_id);
1741                 rt->draw_idle_id = 0;
1742                 }
1743         rt_sync_scroll(rt);
1744 }
1745
1746 static void rt_queue_merge(QueueData *parent, QueueData *qd)
1747 {
1748         if (parent->x + parent->w < qd->x + qd->w)
1749                 {
1750                 parent->w += (qd->x + qd->w) - (parent->x + parent->w);
1751                 }
1752         if (parent->x > qd->x)
1753                 {
1754                 parent->w += parent->x - qd->x;
1755                 parent->x = qd->x;
1756                 }
1757
1758         if (parent->y + parent->h < qd->y + qd->h)
1759                 {
1760                 parent->h += (qd->y + qd->h) - (parent->y + parent->h);
1761                 }
1762         if (parent->y > qd->y)
1763                 {
1764                 parent->h += parent->y - qd->y;
1765                 parent->y = qd->y;
1766                 }
1767
1768         parent->new_data |= qd->new_data;
1769 }
1770
1771 static gboolean rt_clamp_to_visible(RendererTiles *rt, gint *x, gint *y, gint *w, gint *h)
1772 {
1773         PixbufRenderer *pr = rt->pr;
1774         gint nx, ny;
1775         gint nw, nh;
1776         gint vx, vy;
1777         gint vw, vh;
1778
1779         vw = pr->vis_width;
1780         vh = pr->vis_height;
1781
1782         vx = rt->x_scroll;
1783         vy = rt->y_scroll;
1784
1785         if (*x + *w < vx || *x > vx + vw || *y + *h < vy || *y > vy + vh) return FALSE;
1786
1787         /* now clamp it */
1788         nx = CLAMP(*x, vx, vx + vw);
1789         nw = CLAMP(*w - (nx - *x), 1, vw);
1790
1791         ny = CLAMP(*y, vy, vy + vh);
1792         nh = CLAMP(*h - (ny - *y), 1, vh);
1793
1794         *x = nx;
1795         *y = ny;
1796         *w = nw;
1797         *h = nh;
1798
1799         return TRUE;
1800 }
1801
1802 static gboolean rt_queue_to_tiles(RendererTiles *rt, gint x, gint y, gint w, gint h,
1803                                   gboolean clamp, ImageRenderType render,
1804                                   gboolean new_data, gboolean only_existing)
1805 {
1806         PixbufRenderer *pr = rt->pr;
1807         gint i, j;
1808         gint x1, x2;
1809         gint y1, y2;
1810
1811         if (clamp && !rt_clamp_to_visible(rt, &x, &y, &w, &h)) return FALSE;
1812
1813         x1 = ROUND_DOWN(x, rt->tile_width);
1814         x2 = ROUND_UP(x + w, rt->tile_width);
1815
1816         y1 = ROUND_DOWN(y, rt->tile_height);
1817         y2 = ROUND_UP(y + h, rt->tile_height);
1818
1819         for (j = y1; j <= y2; j += rt->tile_height)
1820                 {
1821                 for (i = x1; i <= x2; i += rt->tile_width)
1822                         {
1823                         ImageTile *it;
1824
1825                         it = rt_tile_get(rt, i, j,
1826                                          (only_existing &&
1827                                           (i + rt->tile_width < rt->x_scroll ||
1828                                            i > rt->x_scroll + pr->vis_width ||
1829                                            j + rt->tile_height < rt->y_scroll ||
1830                                            j > rt->y_scroll + pr->vis_height)));
1831                         if (it)
1832                                 {
1833                                 if ((render == TILE_RENDER_ALL && it->render_done != TILE_RENDER_ALL) ||
1834                                     (render == TILE_RENDER_AREA && it->render_todo != TILE_RENDER_ALL))
1835                                         {
1836                                         it->render_todo = render;
1837                                         }
1838
1839                                 auto qd = g_new(QueueData, 1);
1840                                 qd->it = it;
1841                                 qd->new_data = new_data;
1842
1843                                 if (i < x)
1844                                         {
1845                                         qd->x = x - i;
1846                                         }
1847                                 else
1848                                         {
1849                                         qd->x = 0;
1850                                         }
1851                                 qd->w = x + w - i - qd->x;
1852                                 if (qd->x + qd->w > rt->tile_width) qd->w = rt->tile_width - qd->x;
1853
1854                                 if (j < y)
1855                                         {
1856                                         qd->y = y - j;
1857                                         }
1858                                 else
1859                                         {
1860                                         qd->y = 0;
1861                                         }
1862                                 qd->h = y + h - j - qd->y;
1863                                 if (qd->y + qd->h > rt->tile_height) qd->h = rt->tile_height - qd->y;
1864
1865                                 if (qd->w < 1 || qd->h < 1)
1866                                         {
1867                                         g_free(qd);
1868                                         }
1869                                 else if (it->qd)
1870                                         {
1871                                         rt_queue_merge(it->qd, qd);
1872                                         g_free(qd);
1873                                         }
1874                                 else
1875                                         {
1876                                         it->qd = qd;
1877                                         rt->draw_queue = g_list_append(rt->draw_queue, qd);
1878                                         }
1879                                 }
1880                         }
1881                 }
1882
1883         return TRUE;
1884 }
1885
1886 static void rt_queue(RendererTiles *rt, gint x, gint y, gint w, gint h,
1887                      gboolean clamp, ImageRenderType render,
1888                      gboolean new_data, gboolean only_existing)
1889 {
1890         PixbufRenderer *pr = rt->pr;
1891         gint nx, ny;
1892
1893         rt_sync_scroll(rt);
1894
1895         nx = CLAMP(x, 0, pr->width - 1);
1896         ny = CLAMP(y, 0, pr->height - 1);
1897         w -= (nx - x);
1898         h -= (ny - y);
1899         w = CLAMP(w, 0, pr->width - nx);
1900         h = CLAMP(h, 0, pr->height - ny);
1901         if (w < 1 || h < 1) return;
1902
1903         if (rt_queue_to_tiles(rt, nx, ny, w, h, clamp, render, new_data, only_existing) &&
1904             ((!rt->draw_queue && !rt->draw_queue_2pass) || !rt->draw_idle_id))
1905                 {
1906                 if (rt->draw_idle_id)
1907                         {
1908                         g_source_remove(rt->draw_idle_id);
1909                         rt->draw_idle_id = 0;
1910                         }
1911                 rt_queue_schedule_next_draw(rt, TRUE);
1912                 }
1913 }
1914
1915 static void rt_scroll(void *renderer, gint x_off, gint y_off)
1916 {
1917         auto rt = static_cast<RendererTiles *>(renderer);
1918         PixbufRenderer *pr = rt->pr;
1919
1920         rt_sync_scroll(rt);
1921         if (rt->stereo_mode & PR_STEREO_MIRROR) x_off = -x_off;
1922         if (rt->stereo_mode & PR_STEREO_FLIP) y_off = -y_off;
1923
1924         gint w = pr->vis_width - abs(x_off);
1925         gint h = pr->vis_height - abs(y_off);
1926
1927         if (w < 1 || h < 1)
1928                 {
1929                 /* scrolled completely to new material */
1930                 rt_queue(rt, 0, 0, pr->width, pr->height, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
1931                 return;
1932                 }
1933
1934                 gint x1, y1;
1935                 gint x2, y2;
1936                 cairo_t *cr;
1937                 cairo_surface_t *surface;
1938
1939                 if (x_off < 0)
1940                         {
1941                         x1 = abs(x_off);
1942                         x2 = 0;
1943                         }
1944                 else
1945                         {
1946                         x1 = 0;
1947                         x2 = abs(x_off);
1948                         }
1949
1950                 if (y_off < 0)
1951                         {
1952                         y1 = abs(y_off);
1953                         y2 = 0;
1954                         }
1955                 else
1956                         {
1957                         y1 = 0;
1958                         y2 = abs(y_off);
1959                         }
1960
1961                 cr = cairo_create(rt->surface);
1962                 surface = rt->surface;
1963
1964                 /* clipping restricts the intermediate surface's size, so it's a good idea
1965                  * to use it. */
1966                 cairo_rectangle(cr, x1 + pr->x_offset + rt->stereo_off_x, y1 + pr->y_offset + rt->stereo_off_y, w, h);
1967                 cairo_clip (cr);
1968                 /* Now push a group to change the target */
1969                 cairo_push_group (cr);
1970                 cairo_set_source_surface(cr, surface, x1 - x2, y1 - y2);
1971                 cairo_paint(cr);
1972                 /* Now copy the intermediate target back */
1973                 cairo_pop_group_to_source(cr);
1974                 cairo_paint(cr);
1975                 cairo_destroy(cr);
1976
1977                 rt_overlay_queue_all(rt, x2, y2, x1, y1);
1978
1979                 w = pr->vis_width - w;
1980                 h = pr->vis_height - h;
1981
1982                 if (w > 0)
1983                         {
1984                         rt_queue(rt,
1985                                     x_off > 0 ? rt->x_scroll + (pr->vis_width - w) : rt->x_scroll, rt->y_scroll,
1986                                     w, pr->vis_height, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
1987                         }
1988                 if (h > 0)
1989                         {
1990                         /** @FIXME to optimize this, remove overlap */
1991                         rt_queue(rt,
1992                                     rt->x_scroll, y_off > 0 ? rt->y_scroll + (pr->vis_height - h) : rt->y_scroll,
1993                                     pr->vis_width, h, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
1994                         }
1995 }
1996
1997 static void renderer_area_changed(void *renderer, gint src_x, gint src_y, gint src_w, gint src_h)
1998 {
1999         auto rt = static_cast<RendererTiles *>(renderer);
2000         PixbufRenderer *pr = rt->pr;
2001         gint x, y, width, height,  x1, y1, x2, y2;
2002
2003         gint orientation = rt_get_orientation(rt);
2004         pr_coords_map_orientation_reverse(orientation,
2005                                      src_x - GET_RIGHT_PIXBUF_OFFSET(rt), src_y,
2006                                      pr->image_width, pr->image_height,
2007                                      src_w, src_h,
2008                                      &x, &y,
2009                                      &width, &height);
2010
2011         if (pr->scale != 1.0 && pr->zoom_quality != GDK_INTERP_NEAREST)
2012                 {
2013                 /* increase region when using a zoom quality that may access surrounding pixels */
2014                 y -= 1;
2015                 height += 2;
2016                 }
2017
2018         x1 = static_cast<gint>(floor(static_cast<gdouble>(x) * pr->scale));
2019         y1 = static_cast<gint>(floor(static_cast<gdouble>(y) * pr->scale * pr->aspect_ratio));
2020         x2 = static_cast<gint>(ceil(static_cast<gdouble>(x + width) * pr->scale));
2021         y2 = static_cast<gint>(ceil(static_cast<gdouble>(y + height) * pr->scale * pr->aspect_ratio));
2022
2023         rt_queue(rt, x1, y1, x2 - x1, y2 - y1, FALSE, TILE_RENDER_AREA, TRUE, TRUE);
2024 }
2025
2026 static void renderer_redraw(RendererTiles *rt, gint x, gint y, gint w, gint h,
2027                      gint clamp, ImageRenderType render, gboolean new_data, gboolean only_existing)
2028 {
2029         PixbufRenderer *pr = rt->pr;
2030
2031         x -= rt->stereo_off_x;
2032         y -= rt->stereo_off_y;
2033
2034         rt_border_draw(rt, x, y, w, h);
2035
2036         x = MAX(0, x - pr->x_offset + pr->x_scroll);
2037         y = MAX(0, y - pr->y_offset + pr->y_scroll);
2038
2039         rt_queue(rt,
2040                  x, y,
2041                  MIN(w, pr->width - x),
2042                  MIN(h, pr->height - y),
2043                  clamp, render, new_data, only_existing);
2044 }
2045
2046 static void renderer_update_pixbuf(void *renderer, gboolean)
2047 {
2048         rt_queue_clear(static_cast<RendererTiles *>(renderer));
2049 }
2050
2051 static void renderer_update_zoom(void *renderer, gboolean lazy)
2052 {
2053         auto rt = static_cast<RendererTiles *>(renderer);
2054         PixbufRenderer *pr = rt->pr;
2055
2056         rt_tile_invalidate_all(static_cast<RendererTiles *>(renderer));
2057         if (!lazy)
2058                 {
2059                 renderer_redraw(static_cast<RendererTiles *>(renderer), 0, 0, pr->width, pr->height, TRUE, TILE_RENDER_ALL, TRUE, FALSE);
2060                 }
2061         rt_border_clear(rt);
2062 }
2063
2064 static void renderer_invalidate_region(void *renderer, gint x, gint y, gint w, gint h)
2065 {
2066         rt_tile_invalidate_region(static_cast<RendererTiles *>(renderer), x, y, w, h);
2067 }
2068
2069 static void renderer_update_viewport(void *renderer)
2070 {
2071         auto rt = static_cast<RendererTiles *>(renderer);
2072
2073         rt->stereo_off_x = 0;
2074         rt->stereo_off_y = 0;
2075
2076         if (rt->stereo_mode & PR_STEREO_RIGHT)
2077                 {
2078                 if (rt->stereo_mode & PR_STEREO_HORIZ)
2079                         {
2080                         rt->stereo_off_x = rt->pr->viewport_width;
2081                         }
2082                 else if (rt->stereo_mode & PR_STEREO_VERT)
2083                         {
2084                         rt->stereo_off_y = rt->pr->viewport_height;
2085                         }
2086                 else if (rt->stereo_mode & PR_STEREO_FIXED)
2087                         {
2088                         rt->stereo_off_x = rt->pr->stereo_fixed_x_right;
2089                         rt->stereo_off_y = rt->pr->stereo_fixed_y_right;
2090                         }
2091                 }
2092         else
2093                 {
2094                 if (rt->stereo_mode & PR_STEREO_FIXED)
2095                         {
2096                         rt->stereo_off_x = rt->pr->stereo_fixed_x_left;
2097                         rt->stereo_off_y = rt->pr->stereo_fixed_y_left;
2098                         }
2099                 }
2100         DEBUG_1("update size: %p  %d %d   %d %d", (void *)rt, rt->stereo_off_x, rt->stereo_off_y, rt->pr->viewport_width, rt->pr->viewport_height);
2101         rt_sync_scroll(rt);
2102         rt_overlay_update_sizes(rt);
2103         rt_border_clear(rt);
2104 }
2105
2106 static void renderer_stereo_set(void *renderer, gint stereo_mode)
2107 {
2108         auto rt = static_cast<RendererTiles *>(renderer);
2109
2110         rt->stereo_mode = stereo_mode;
2111 }
2112
2113 static void renderer_free(void *renderer)
2114 {
2115         auto rt = static_cast<RendererTiles *>(renderer);
2116         rt_queue_clear(rt);
2117         rt_tile_free_all(rt);
2118         if (rt->spare_tile) g_object_unref(rt->spare_tile);
2119         if (rt->overlay_buffer) g_object_unref(rt->overlay_buffer);
2120         rt_overlay_list_clear(rt);
2121         /* disconnect "hierarchy-changed" */
2122         g_signal_handlers_disconnect_matched(G_OBJECT(rt->pr), G_SIGNAL_MATCH_DATA,
2123                                                      0, 0, nullptr, nullptr, rt);
2124         g_free(rt);
2125 }
2126
2127 static gboolean rt_realize_cb(GtkWidget *widget, gpointer data)
2128 {
2129         auto rt = static_cast<RendererTiles *>(data);
2130         cairo_t *cr;
2131
2132         if (!rt->surface)
2133                 {
2134                 rt->surface = gdk_window_create_similar_surface(gtk_widget_get_window(widget), CAIRO_CONTENT_COLOR, gtk_widget_get_allocated_width(widget), gtk_widget_get_allocated_height(widget));
2135
2136                 cr = cairo_create(rt->surface);
2137                 cairo_set_source_rgb(cr, static_cast<gdouble>(rt->pr->color.red), static_cast<gdouble>(rt->pr->color.green), static_cast<gdouble>(rt->pr->color.blue));
2138                 cairo_paint(cr);
2139                 cairo_destroy(cr);
2140                 }
2141
2142         return FALSE;
2143 }
2144
2145 static gboolean rt_size_allocate_cb(GtkWidget *widget,  GdkRectangle *allocation, gpointer data)
2146 {
2147         auto rt = static_cast<RendererTiles *>(data);
2148         cairo_t *cr;
2149         cairo_surface_t *old_surface;
2150
2151         if (gtk_widget_get_realized(GTK_WIDGET(rt->pr)))
2152                 {
2153                 old_surface = rt->surface;
2154                 rt->surface = gdk_window_create_similar_surface(gtk_widget_get_window(widget), CAIRO_CONTENT_COLOR, allocation->width, allocation->height);
2155
2156                 cr = cairo_create(rt->surface);
2157
2158                 cairo_set_source_rgb(cr, static_cast<gdouble>(options->image.border_color.red), static_cast<gdouble>(options->image.border_color.green), static_cast<gdouble>(options->image.border_color.blue));
2159                 cairo_paint(cr);
2160                 cairo_set_source_surface(cr, old_surface, 0, 0);
2161                 cairo_paint(cr);
2162                 cairo_destroy(cr);
2163                 cairo_surface_destroy(old_surface);
2164
2165                 renderer_redraw(rt, allocation->x, allocation->y, allocation->width, allocation->height, FALSE, TILE_RENDER_ALL, FALSE, FALSE);
2166         }
2167
2168         return FALSE;
2169 }
2170
2171 static gboolean rt_draw_cb(GtkWidget *, cairo_t *cr, gpointer data)
2172 {
2173         auto rt = static_cast<RendererTiles *>(data);
2174         GList *work;
2175         OverlayData *od;
2176
2177         if (rt->stereo_mode & (PR_STEREO_HORIZ | PR_STEREO_VERT))
2178                 {
2179                 cairo_push_group(cr);
2180                 cairo_set_source_rgb(cr, static_cast<double>(rt->pr->color.red), static_cast<double>(rt->pr->color.green), static_cast<double>(rt->pr->color.blue));
2181
2182                 if (rt->stereo_mode & PR_STEREO_HORIZ)
2183                         {
2184                         cairo_rectangle(cr, rt->stereo_off_x, 0, rt->pr->viewport_width, rt->pr->viewport_height);
2185                         }
2186                 else
2187                         {
2188                         cairo_rectangle(cr, 0, rt->stereo_off_y, rt->pr->viewport_width, rt->pr->viewport_height);
2189                         }
2190                 cairo_clip(cr);
2191                 cairo_paint(cr);
2192
2193                 cairo_rectangle(cr, rt->pr->x_offset + rt->stereo_off_x, rt->pr->y_offset + rt->stereo_off_y, rt->pr->vis_width, rt->pr->vis_height);
2194                 cairo_clip(cr);
2195                 cairo_set_source_surface(cr, rt->surface, 0, 0);
2196                 cairo_paint(cr);
2197
2198                 cairo_pop_group_to_source(cr);
2199                 cairo_paint(cr);
2200                 }
2201         else
2202                 {
2203                 cairo_set_source_surface(cr, rt->surface, 0, 0);
2204                 cairo_paint(cr);
2205                 }
2206
2207         work = rt->overlay_list;
2208         while (work)
2209                 {
2210                 od = static_cast<OverlayData *>(work->data);
2211                 gint px, py, pw, ph;
2212                 pw = gdk_pixbuf_get_width(od->pixbuf);
2213                 ph = gdk_pixbuf_get_height(od->pixbuf);
2214                 px = od->x;
2215                 py = od->y;
2216
2217                 if (od->flags & OVL_RELATIVE)
2218                         {
2219                         if (px < 0) px = rt->pr->viewport_width - pw + px;
2220                         if (py < 0) py = rt->pr->viewport_height - ph + py;
2221                         }
2222
2223                 gdk_cairo_set_source_pixbuf(cr, od->pixbuf, px, py);
2224                 cairo_paint(cr);
2225                 work = work->next;
2226                 }
2227
2228         return FALSE;
2229 }
2230
2231 RendererFuncs *renderer_tiles_new(PixbufRenderer *pr)
2232 {
2233         auto rt = g_new0(RendererTiles, 1);
2234
2235         rt->pr = pr;
2236
2237         rt->f.area_changed = renderer_area_changed;
2238         rt->f.update_pixbuf = renderer_update_pixbuf;
2239         rt->f.free = renderer_free;
2240         rt->f.update_zoom = renderer_update_zoom;
2241         rt->f.invalidate_region = renderer_invalidate_region;
2242         rt->f.scroll = rt_scroll;
2243         rt->f.update_viewport = renderer_update_viewport;
2244
2245
2246         rt->f.overlay_add = renderer_tiles_overlay_add;
2247         rt->f.overlay_set = renderer_tiles_overlay_set;
2248         rt->f.overlay_get = renderer_tiles_overlay_get;
2249
2250         rt->f.stereo_set = renderer_stereo_set;
2251
2252         rt->tile_width = options->image.tile_size;
2253         rt->tile_height = options->image.tile_size;
2254
2255         rt->tiles = nullptr;
2256         rt->tile_cache_size = 0;
2257
2258         rt->tile_cache_max = PR_CACHE_SIZE_DEFAULT;
2259
2260         rt->draw_idle_id = 0;
2261
2262         rt->stereo_mode = 0;
2263         rt->stereo_off_x = 0;
2264         rt->stereo_off_y = 0;
2265
2266         rt->hidpi_scale = gtk_widget_get_scale_factor(GTK_WIDGET(rt->pr));
2267
2268         g_signal_connect(G_OBJECT(pr), "hierarchy-changed",
2269                          G_CALLBACK(rt_hierarchy_changed_cb), rt);
2270
2271         g_signal_connect(G_OBJECT(pr), "draw",
2272                          G_CALLBACK(rt_draw_cb), rt);
2273         g_signal_connect(G_OBJECT(pr), "realize", G_CALLBACK(rt_realize_cb), rt);
2274         g_signal_connect(G_OBJECT(pr), "size-allocate", G_CALLBACK(rt_size_allocate_cb), rt);
2275
2276         return reinterpret_cast<RendererFuncs *>(rt);
2277 }
2278
2279
2280 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */