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 "renderer-tiles.h"
  23
  24 #include <cmath>
  25 #include <cstdlib>
  26 #include <cstring>
  27 #include <utility>
  28
  29 #include <cairo.h>
  30 #include <gdk-pixbuf/gdk-pixbuf.h>
  31 #include <gdk/gdk.h>
  32 #include <glib-object.h>
  33 #include <glib.h>
  34 #include <gtk/gtk.h>
  35
  36 #include "debug.h"
  37 #include "options.h"
  38 #include "pixbuf-renderer.h"
  39 #include "typedefs.h"
  40
  41 /* comment this out if not using this from within Geeqie
  42  * defining GQ_BUILD does these things:
  43  *   - Sets the shift-click scroller pixbuf to a nice icon instead of a black box
  44  */
  45 #define GQ_BUILD 1
  46
  47 #ifdef GQ_BUILD
  48 #include "exif.h"
  49 #include "pixbuf-util.h"
  50 #else
  51 enum ExifOrientationType {
  52         EXIF_ORIENTATION_UNKNOWN        = 0,
  53         EXIF_ORIENTATION_TOP_LEFT       = 1,
  54         EXIF_ORIENTATION_TOP_RIGHT      = 2,
  55         EXIF_ORIENTATION_BOTTOM_RIGHT   = 3,
  56         EXIF_ORIENTATION_BOTTOM_LEFT    = 4,
  57         EXIF_ORIENTATION_LEFT_TOP       = 5,
  58         EXIF_ORIENTATION_RIGHT_TOP      = 6,
  59         EXIF_ORIENTATION_RIGHT_BOTTOM   = 7,
  60         EXIF_ORIENTATION_LEFT_BOTTOM    = 8
  61 };
  62 #endif
  63
  64 namespace
  65 {
  66
  67 struct QueueData;
  68
  69 struct ImageTile
  70 {
  71         cairo_surface_t *surface;       /* off screen buffer */
  72         GdkPixbuf *pixbuf;      /* pixbuf area for zooming */
  73         gint x;                 /* x offset into image */
  74         gint y;                 /* y offset into image */
  75         gint w;                 /* width that is visible (may be less if at edge of image) */
  76         gint h;                 /* height '' */
  77
  78         gboolean blank;
  79
  80 /* render_todo: (explanation)
  81         NONE    do nothing
  82         AREA    render area of tile, usually only used when loading an image
  83                 note: will jump to an ALL if render_done is not ALL.
  84         ALL     render entire tile, if never done before w/ ALL, for expose events *only*
  85 */
  86
  87         ImageRenderType render_todo;    /* what to do (see above) */
  88         ImageRenderType render_done;    /* highest that has been done before on tile */
  89
  90         QueueData *qd;
  91         QueueData *qd2;
  92
  93         guint size;             /* est. memory used by pixmap and pixbuf */
  94 };
  95
  96 struct QueueData
  97 {
  98         ImageTile *it;
  99         gint x;
 100         gint y;
 101         gint w;
 102         gint h;
 103         gboolean new_data;
 104 };
 105
 106 struct OverlayData
 107 {
 108         gint id;
 109
 110         GdkPixbuf *pixbuf;
 111         GdkWindow *window;
 112
 113         gint x;
 114         gint y;
 115
 116         OverlayRendererFlags flags;
 117 };
 118
 119 struct RendererTiles
 120 {
 121         RendererFuncs f;
 122         PixbufRenderer *pr;
 123
 124         gint tile_cache_max;            /* max MiB to use for offscreen buffer */
 125
 126         gint tile_width;
 127         gint tile_height;
 128         GList *tiles;           /* list of buffer tiles */
 129         gint tile_cache_size;   /* allocated size of pixmaps/pixbufs */
 130         GList *draw_queue;      /* list of areas to redraw */
 131         GList *draw_queue_2pass;/* list when 2 pass is enabled */
 132
 133         GList *overlay_list;
 134         cairo_surface_t *overlay_buffer;
 135         cairo_surface_t *surface;
 136
 137         guint draw_idle_id; /* event source id */
 138
 139         GdkPixbuf *spare_tile;
 140
 141         gint stereo_mode;
 142         gint stereo_off_x;
 143         gint stereo_off_y;
 144
 145         gint x_scroll;  /* allow local adjustment and mirroring */
 146         gint y_scroll;
 147
 148         gint hidpi_scale;
 149 };
 150
 151 constexpr size_t COLOR_BYTES = 3; /* rgb */
 152
 153
 154 inline gint get_right_pixbuf_offset(RendererTiles *rt)
 155 {
 156         return (!!(rt->stereo_mode & PR_STEREO_RIGHT) != !!(rt->stereo_mode & PR_STEREO_SWAP)) ?
 157                rt->pr->stereo_pixbuf_offset_right : rt->pr->stereo_pixbuf_offset_left;
 158 }
 159
 160 inline gint get_left_pixbuf_offset(RendererTiles *rt)
 161 {
 162         return (!!(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 } // namespace
 167
 168
 169 static void rt_overlay_draw(RendererTiles *rt, gint x, gint y, gint w, gint h, ImageTile *it);
 170
 171 static gboolean rt_tile_is_visible(RendererTiles *rt, ImageTile *it);
 172 static void rt_queue_merge(QueueData *parent, QueueData *qd);
 173 static void rt_queue(RendererTiles *rt, gint x, gint y, gint w, gint h,
 174                      gint clamp, ImageRenderType render, gboolean new_data, gboolean only_existing);
 175
 176 static gint rt_queue_draw_idle_cb(gpointer data);
 177
 178
 179 static void rt_sync_scroll(RendererTiles *rt)
 180 {
 181         PixbufRenderer *pr = rt->pr;
 182
 183         rt->x_scroll = (rt->stereo_mode & PR_STEREO_MIRROR) ?
 184                        pr->width - pr->vis_width - pr->x_scroll
 185                        : pr->x_scroll;
 186
 187         rt->y_scroll = (rt->stereo_mode & PR_STEREO_FLIP) ?
 188                        pr->height - pr->vis_height - pr->y_scroll
 189                        : pr->y_scroll;
 190 }
 191
 192 /*
 193  *-------------------------------------------------------------------
 194  * borders
 195  *-------------------------------------------------------------------
 196  */
 197
 198 static void rt_border_draw(RendererTiles *rt, gint x, gint y, gint w, gint h)
 199 {
 200         PixbufRenderer *pr = rt->pr;
 201         GtkWidget *box;
 202         GdkWindow *window;
 203         gint rx;
 204         gint ry;
 205         gint rw;
 206         gint rh;
 207         cairo_t *cr;
 208
 209         box = GTK_WIDGET(pr);
 210         window = gtk_widget_get_window(box);
 211
 212         if (!window) return;
 213
 214         cr = cairo_create(rt->surface);
 215
 216         auto draw = [rt, pr, cr](gint x, gint y, gint w, gint h)
 217         {
 218                 cairo_set_source_rgb(cr, static_cast<double>(pr->color.red), static_cast<double>(pr->color.green), static_cast<double>(pr->color.blue));
 219                 cairo_rectangle(cr, x + rt->stereo_off_x, y + rt->stereo_off_y, w, h);
 220                 cairo_fill(cr);
 221                 rt_overlay_draw(rt, x, y, w, h, nullptr);
 222         };
 223
 224         if (!pr->pixbuf && !pr->source_tiles_enabled)
 225                 {
 226                 if (pr_clip_region(x, y, w, h,
 227                                    0, 0,
 228                                    pr->viewport_width, pr->viewport_height,
 229                                    &rx, &ry, &rw, &rh))
 230                         {
 231                         draw(rx, ry, rw, rh);
 232                         }
 233                 cairo_destroy(cr);
 234                 return;
 235                 }
 236
 237         if (pr->vis_width < pr->viewport_width)
 238                 {
 239                 if (pr->x_offset > 0 &&
 240                     pr_clip_region(x, y, w, h,
 241                                    0, 0,
 242                                    pr->x_offset, pr->viewport_height,
 243                                    &rx, &ry, &rw, &rh))
 244                         {
 245                         draw(rx, ry, rw, rh);
 246                         }
 247                 if (pr->viewport_width - pr->vis_width - pr->x_offset > 0 &&
 248                     pr_clip_region(x, y, w, h,
 249                                    pr->x_offset + pr->vis_width, 0,
 250                                    pr->viewport_width - pr->vis_width - pr->x_offset, pr->viewport_height,
 251                                    &rx, &ry, &rw, &rh))
 252                         {
 253                         draw(rx, ry, rw, rh);
 254                         }
 255                 }
 256         if (pr->vis_height < pr->viewport_height)
 257                 {
 258                 if (pr->y_offset > 0 &&
 259                     pr_clip_region(x, y, w, h,
 260                                    pr->x_offset, 0,
 261                                    pr->vis_width, pr->y_offset,
 262                                    &rx, &ry, &rw, &rh))
 263                         {
 264                         draw(rx, ry, rw, rh);
 265                         }
 266                 if (pr->viewport_height - pr->vis_height - pr->y_offset > 0 &&
 267                     pr_clip_region(x, y, w, h,
 268                                    pr->x_offset, pr->y_offset + pr->vis_height,
 269                                    pr->vis_width, pr->viewport_height - pr->vis_height - pr->y_offset,
 270                                    &rx, &ry, &rw, &rh))
 271                         {
 272                         draw(rx, ry, rw, rh);
 273                         }
 274                 }
 275         cairo_destroy(cr);
 276 }
 277
 278 static void rt_border_clear(RendererTiles *rt)
 279 {
 280         PixbufRenderer *pr = rt->pr;
 281         rt_border_draw(rt, 0, 0, pr->viewport_width, pr->viewport_height);
 282 }
 283
 284
 285 /*
 286  *-------------------------------------------------------------------
 287  * display tiles
 288  *-------------------------------------------------------------------
 289  */
 290
 291 static ImageTile *rt_tile_new(gint x, gint y, gint width, gint height)
 292 {
 293         auto it = g_new0(ImageTile, 1);
 294
 295         it->x = x;
 296         it->y = y;
 297         it->w = width;
 298         it->h = height;
 299
 300         it->render_done = TILE_RENDER_NONE;
 301
 302         return it;
 303 }
 304
 305 static void rt_tile_free(ImageTile *it)
 306 {
 307         if (!it) return;
 308
 309         if (it->pixbuf) g_object_unref(it->pixbuf);
 310         if (it->surface) cairo_surface_destroy(it->surface);
 311
 312         g_free(it);
 313 }
 314
 315 static void rt_tile_free_all(RendererTiles *rt)
 316 {
 317         g_list_free_full(rt->tiles, reinterpret_cast<GDestroyNotify>(rt_tile_free));
 318         rt->tiles = nullptr;
 319         rt->tile_cache_size = 0;
 320 }
 321
 322 static ImageTile *rt_tile_add(RendererTiles *rt, gint x, gint y)
 323 {
 324         PixbufRenderer *pr = rt->pr;
 325         ImageTile *it;
 326
 327         it = rt_tile_new(x, y, rt->tile_width, rt->tile_height);
 328
 329         if (it->x + it->w > pr->width) it->w = pr->width - it->x;
 330         if (it->y + it->h > pr->height) it->h = pr->height - it->y;
 331
 332         rt->tiles = g_list_prepend(rt->tiles, it);
 333         rt->tile_cache_size += it->size;
 334
 335         return it;
 336 }
 337
 338 static void rt_tile_remove(RendererTiles *rt, ImageTile *it)
 339 {
 340         if (it->qd)
 341                 {
 342                 QueueData *qd = it->qd;
 343
 344                 it->qd = nullptr;
 345                 rt->draw_queue = g_list_remove(rt->draw_queue, qd);
 346                 g_free(qd);
 347                 }
 348
 349         if (it->qd2)
 350                 {
 351                 QueueData *qd = it->qd2;
 352
 353                 it->qd2 = nullptr;
 354                 rt->draw_queue_2pass = g_list_remove(rt->draw_queue_2pass, qd);
 355                 g_free(qd);
 356                 }
 357
 358         rt->tiles = g_list_remove(rt->tiles, it);
 359         rt->tile_cache_size -= it->size;
 360
 361         rt_tile_free(it);
 362 }
 363
 364 static void rt_tile_free_space(RendererTiles *rt, guint space, ImageTile *it)
 365 {
 366         PixbufRenderer *pr = rt->pr;
 367         GList *work;
 368         guint tile_max;
 369
 370         work = g_list_last(rt->tiles);
 371
 372         if (pr->source_tiles_enabled && pr->scale < 1.0)
 373                 {
 374                 gint tiles;
 375
 376                 tiles = (pr->vis_width / rt->tile_width + 1) * (pr->vis_height / rt->tile_height + 1);
 377                 tile_max = MAX(tiles * rt->tile_width * rt->tile_height * 3,
 378                                (gint)((gdouble)rt->tile_cache_max * 1048576.0 * pr->scale));
 379                 }
 380         else
 381                 {
 382                 tile_max = rt->tile_cache_max * 1048576;
 383                 }
 384
 385         while (work && rt->tile_cache_size + space > tile_max)
 386                 {
 387                 ImageTile *needle;
 388
 389                 needle = static_cast<ImageTile *>(work->data);
 390                 work = work->prev;
 391                 if (needle != it &&
 392                     ((!needle->qd && !needle->qd2) || !rt_tile_is_visible(rt, needle))) rt_tile_remove(rt, needle);
 393                 }
 394 }
 395
 396 static void rt_tile_invalidate_all(RendererTiles *rt)
 397 {
 398         PixbufRenderer *pr = rt->pr;
 399         GList *work;
 400
 401         work = rt->tiles;
 402         while (work)
 403                 {
 404                 ImageTile *it;
 405
 406                 it = static_cast<ImageTile *>(work->data);
 407                 work = work->next;
 408
 409                 it->render_done = TILE_RENDER_NONE;
 410                 it->render_todo = TILE_RENDER_ALL;
 411                 it->blank = FALSE;
 412
 413                 it->w = MIN(rt->tile_width, pr->width - it->x);
 414                 it->h = MIN(rt->tile_height, pr->height - it->y);
 415                 }
 416 }
 417
 418 static void rt_tile_invalidate_region(RendererTiles *rt, gint x, gint y, gint w, gint h)
 419 {
 420         gint x1;
 421         gint x2;
 422         gint y1;
 423         gint y2;
 424         GList *work;
 425
 426         x1 = ROUND_DOWN(x, rt->tile_width);
 427         x2 = ROUND_UP(x + w, rt->tile_width);
 428
 429         y1 = ROUND_DOWN(y, rt->tile_height);
 430         y2 = ROUND_UP(y + h, rt->tile_height);
 431
 432         work = rt->tiles;
 433         while (work)
 434                 {
 435                 ImageTile *it;
 436
 437                 it = static_cast<ImageTile *>(work->data);
 438                 work = work->next;
 439
 440                 if (it->x < x2 && it->x + it->w > x1 &&
 441                     it->y < y2 && it->y + it->h > y1)
 442                         {
 443                         it->render_done = TILE_RENDER_NONE;
 444                         it->render_todo = TILE_RENDER_ALL;
 445                         }
 446                 }
 447 }
 448
 449 static ImageTile *rt_tile_get(RendererTiles *rt, gint x, gint y, gboolean only_existing)
 450 {
 451         GList *work;
 452
 453         work = rt->tiles;
 454         while (work)
 455                 {
 456                 ImageTile *it;
 457
 458                 it = static_cast<ImageTile *>(work->data);
 459                 if (it->x == x && it->y == y)
 460                         {
 461                         rt->tiles = g_list_delete_link(rt->tiles, work);
 462                         rt->tiles = g_list_prepend(rt->tiles, it);
 463                         return it;
 464                         }
 465
 466                 work = work->next;
 467                 }
 468
 469         if (only_existing) return nullptr;
 470
 471         return rt_tile_add(rt, x, y);
 472 }
 473
 474 static gint pixmap_calc_size(cairo_surface_t *)
 475 {
 476         return options->image.tile_size * options->image.tile_size * 4 / 8;
 477 }
 478
 479 static void rt_hidpi_aware_draw(
 480         RendererTiles *rt,
 481         cairo_t *cr,
 482         GdkPixbuf *pixbuf,
 483         double x,
 484         double y)
 485 {
 486         cairo_surface_t *surface;
 487         surface = gdk_cairo_surface_create_from_pixbuf(pixbuf, rt->hidpi_scale, nullptr);
 488         cairo_set_source_surface(cr, surface, x, y);
 489         cairo_fill(cr);
 490         cairo_surface_destroy(surface);
 491 }
 492
 493 static void rt_tile_prepare(RendererTiles *rt, ImageTile *it)
 494 {
 495         PixbufRenderer *pr = rt->pr;
 496         if (!it->surface)
 497                 {
 498                 cairo_surface_t *surface;
 499                 guint size;
 500
 501                 surface = gdk_window_create_similar_surface(gtk_widget_get_window(reinterpret_cast<GtkWidget *>(pr)),
 502                                                             CAIRO_CONTENT_COLOR,
 503                                                             rt->tile_width, rt->tile_height);
 504
 505                 size = pixmap_calc_size(surface) * rt->hidpi_scale * rt->hidpi_scale;
 506                 rt_tile_free_space(rt, size, it);
 507
 508                 it->surface = surface;
 509                 it->size += size;
 510                 rt->tile_cache_size += size;
 511                 }
 512
 513         if (!it->pixbuf)
 514                 {
 515                 GdkPixbuf *pixbuf;
 516                 guint size;
 517                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, rt->hidpi_scale * rt->tile_width, rt->hidpi_scale * rt->tile_height);
 518
 519                 size = gdk_pixbuf_get_rowstride(pixbuf) * rt->tile_height * rt->hidpi_scale;
 520                 rt_tile_free_space(rt, size, it);
 521
 522                 it->pixbuf = pixbuf;
 523                 it->size += size;
 524                 rt->tile_cache_size += size;
 525                 }
 526 }
 527
 528 /*
 529  *-------------------------------------------------------------------
 530  * overlays
 531  *-------------------------------------------------------------------
 532  */
 533
 534 static void rt_overlay_get_position(const RendererTiles *rt, const OverlayData *od,
 535                                     gint &x, gint &y, gint &w, gint &h)
 536 {
 537         PixbufRenderer *pr = rt->pr;
 538
 539         x = od->x;
 540         y = od->y;
 541         w = gdk_pixbuf_get_width(od->pixbuf);
 542         h = gdk_pixbuf_get_height(od->pixbuf);
 543
 544         if (od->flags & OVL_RELATIVE)
 545                 {
 546                 if (x < 0) x = pr->viewport_width - w + x;
 547                 if (y < 0) y = pr->viewport_height - h + y;
 548                 }
 549 }
 550
 551 static void rt_overlay_init_window(RendererTiles *rt, OverlayData *od)
 552 {
 553         PixbufRenderer *pr = rt->pr;
 554         gint px;
 555         gint py;
 556         gint pw;
 557         gint ph;
 558         GdkWindowAttr attributes;
 559         gint attributes_mask;
 560
 561         rt_overlay_get_position(rt, od, px, py, pw, ph);
 562
 563         attributes.window_type = GDK_WINDOW_CHILD;
 564         attributes.wclass = GDK_INPUT_OUTPUT;
 565         attributes.width = pw;
 566         attributes.height = ph;
 567         attributes.event_mask = GDK_EXPOSURE_MASK;
 568         attributes_mask = 0;
 569
 570         od->window = gdk_window_new(gtk_widget_get_window(GTK_WIDGET(pr)), &attributes, attributes_mask);
 571         gdk_window_set_user_data(od->window, pr);
 572         gdk_window_move(od->window, px + rt->stereo_off_x, py + rt->stereo_off_y);
 573         gdk_window_show(od->window);
 574 }
 575
 576 static void rt_overlay_draw(RendererTiles *rt, gint x, gint y, gint w, gint h,
 577                             ImageTile *it)
 578 {
 579         PixbufRenderer *pr = rt->pr;
 580         GList *work;
 581
 582         work = rt->overlay_list;
 583         while (work)
 584                 {
 585                 OverlayData *od;
 586                 gint px;
 587                 gint py;
 588                 gint pw;
 589                 gint ph;
 590                 gint rx;
 591                 gint ry;
 592                 gint rw;
 593                 gint rh;
 594
 595                 od = static_cast<OverlayData *>(work->data);
 596                 work = work->next;
 597
 598                 if (!od->window) rt_overlay_init_window(rt, od);
 599
 600                 rt_overlay_get_position(rt, od, px, py, pw, ph);
 601                 if (pr_clip_region(x, y, w, h, px, py, pw, ph, &rx, &ry, &rw, &rh))
 602                         {
 603                         if (!rt->overlay_buffer)
 604                                 {
 605                                 rt->overlay_buffer = gdk_window_create_similar_surface(gtk_widget_get_window(reinterpret_cast<GtkWidget *>(pr)),
 606                                                             CAIRO_CONTENT_COLOR,
 607                                                             rt->tile_width, rt->tile_height);
 608                                 }
 609
 610                         if (it)
 611                                 {
 612                                 cairo_t *cr;
 613
 614                                 cr = cairo_create(rt->overlay_buffer);
 615                                 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);
 616                                 cairo_rectangle(cr, 0, 0, rw, rh);
 617                                 cairo_fill_preserve(cr);
 618
 619                                 gdk_cairo_set_source_pixbuf(cr, od->pixbuf, px - rx, py - ry);
 620                                 cairo_fill(cr);
 621                                 cairo_destroy (cr);
 622
 623                                 cr = gdk_cairo_create(od->window);
 624                                 cairo_set_source_surface(cr, rt->overlay_buffer, rx - px, ry - py);
 625                                 cairo_rectangle (cr, rx - px, ry - py, rw, rh);
 626                                 cairo_fill (cr);
 627                                 cairo_destroy (cr);
 628                                 }
 629                         else
 630                                 {
 631                                 /* no ImageTile means region may be larger than our scratch buffer */
 632                                 gint sx;
 633                                 gint sy;
 634
 635                                 for (sx = rx; sx < rx + rw; sx += rt->tile_width)
 636                                     for (sy = ry; sy < ry + rh; sy += rt->tile_height)
 637                                         {
 638                                         gint sw;
 639                                         gint sh;
 640                                         cairo_t *cr;
 641
 642                                         sw = MIN(rx + rw - sx, rt->tile_width);
 643                                         sh = MIN(ry + rh - sy, rt->tile_height);
 644
 645                                         cr = cairo_create(rt->overlay_buffer);
 646                                         cairo_set_source_rgb(cr, 0, 0, 0);
 647                                         cairo_rectangle(cr, 0, 0, sw, sh);
 648                                         cairo_fill_preserve(cr);
 649
 650                                         gdk_cairo_set_source_pixbuf(cr, od->pixbuf, px - sx, py - sy);
 651                                         cairo_fill (cr);
 652                                         cairo_destroy (cr);
 653
 654                                         cr = gdk_cairo_create(od->window);
 655                                         cairo_set_source_surface(cr, rt->overlay_buffer, sx - px, sy - py);
 656                                         cairo_rectangle (cr, sx - px, sy - py, sw, sh);
 657                                         cairo_fill(cr);
 658                                         cairo_destroy(cr);
 659                                         }
 660                                 }
 661                         }
 662                 }
 663 }
 664
 665 static void rt_overlay_queue_draw(RendererTiles *rt, OverlayData *od, gint x1, gint y1, gint x2, gint y2)
 666 {
 667         PixbufRenderer *pr = rt->pr;
 668         gint x;
 669         gint y;
 670         gint w;
 671         gint h;
 672
 673         rt_overlay_get_position(rt, od, x, y, w, h);
 674
 675         /* add borders */
 676         x -= x1;
 677         y -= y1;
 678         w += x1 + x2;
 679         h += y1 + y2;
 680
 681         rt_queue(rt, rt->x_scroll - pr->x_offset + x,
 682                  rt->y_scroll - pr->y_offset + y,
 683                  w, h,
 684                  FALSE, TILE_RENDER_ALL, FALSE, FALSE);
 685
 686         rt_border_draw(rt, x, y, w, h);
 687 }
 688
 689 static void rt_overlay_queue_all(RendererTiles *rt, gint x1, gint y1, gint x2, gint y2)
 690 {
 691         GList *work;
 692
 693         work = rt->overlay_list;
 694         while (work)
 695                 {
 696                 auto od = static_cast<OverlayData *>(work->data);
 697                 work = work->next;
 698
 699                 rt_overlay_queue_draw(rt, od, x1, y1, x2, y2);
 700                 }
 701 }
 702
 703 static void rt_overlay_update_sizes(RendererTiles *rt)
 704 {
 705         GList *work;
 706
 707         work = rt->overlay_list;
 708         while (work)
 709                 {
 710                 auto od = static_cast<OverlayData *>(work->data);
 711                 work = work->next;
 712
 713                 if (!od->window) rt_overlay_init_window(rt, od);
 714
 715                 if (od->flags & OVL_RELATIVE)
 716                         {
 717                         gint x;
 718                         gint y;
 719                         gint w;
 720                         gint h;
 721
 722                         rt_overlay_get_position(rt, od, x, y, w, h);
 723                         gdk_window_move_resize(od->window, x + rt->stereo_off_x, y + rt->stereo_off_y, w, h);
 724                         }
 725                 }
 726 }
 727
 728 static OverlayData *rt_overlay_find(RendererTiles *rt, gint id)
 729 {
 730         GList *work;
 731
 732         work = rt->overlay_list;
 733         while (work)
 734                 {
 735                 auto od = static_cast<OverlayData *>(work->data);
 736                 work = work->next;
 737
 738                 if (od->id == id) return od;
 739                 }
 740
 741         return nullptr;
 742 }
 743
 744
 745 gint renderer_tiles_overlay_add(void *renderer, GdkPixbuf *pixbuf, gint x, gint y,
 746                                  OverlayRendererFlags flags)
 747 {
 748         auto rt = static_cast<RendererTiles *>(renderer);
 749         PixbufRenderer *pr = rt->pr;
 750         gint id;
 751
 752         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), -1);
 753         g_return_val_if_fail(pixbuf != nullptr, -1);
 754
 755         id = 1;
 756         while (rt_overlay_find(rt, id)) id++;
 757
 758         auto od = g_new0(OverlayData, 1);
 759         od->id = id;
 760         od->pixbuf = pixbuf;
 761         g_object_ref(G_OBJECT(od->pixbuf));
 762         od->x = x;
 763         od->y = y;
 764         od->flags = flags;
 765
 766         rt_overlay_init_window(rt, od);
 767
 768         rt->overlay_list = g_list_append(rt->overlay_list, od);
 769
 770         gtk_widget_queue_draw(GTK_WIDGET(rt->pr));
 771
 772         return od->id;
 773 }
 774
 775 static void rt_overlay_free(RendererTiles *rt, OverlayData *od)
 776 {
 777         rt->overlay_list = g_list_remove(rt->overlay_list, od);
 778
 779         if (od->pixbuf) g_object_unref(G_OBJECT(od->pixbuf));
 780         if (od->window) gdk_window_destroy(od->window);
 781         g_free(od);
 782
 783         if (!rt->overlay_list && rt->overlay_buffer)
 784                 {
 785                 cairo_surface_destroy(rt->overlay_buffer);
 786                 rt->overlay_buffer = nullptr;
 787                 }
 788 }
 789
 790 static void rt_overlay_list_clear(RendererTiles *rt)
 791 {
 792         while (rt->overlay_list)
 793                 {
 794                 auto od = static_cast<OverlayData *>(rt->overlay_list->data);
 795                 rt_overlay_free(rt, od);
 796                 }
 797 }
 798
 799 static void rt_overlay_list_reset_window(RendererTiles *rt)
 800 {
 801         GList *work;
 802
 803         if (rt->overlay_buffer) cairo_surface_destroy(rt->overlay_buffer);
 804         rt->overlay_buffer = nullptr;
 805
 806         work = rt->overlay_list;
 807         while (work)
 808                 {
 809                 auto od = static_cast<OverlayData *>(work->data);
 810                 work = work->next;
 811                 if (od->window) gdk_window_destroy(od->window);
 812                 od->window = nullptr;
 813                 }
 814 }
 815
 816 void renderer_tiles_overlay_set(void *renderer, gint id, GdkPixbuf *pixbuf, gint, gint)
 817 {
 818         auto rc = static_cast<RendererTiles *>(renderer);
 819         PixbufRenderer *pr = rc->pr;
 820         OverlayData *od;
 821
 822         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
 823
 824         od = rt_overlay_find(rc, id);
 825         if (!od) return;
 826
 827         if (pixbuf)
 828                 {
 829                 g_object_ref(G_OBJECT(pixbuf));
 830                 g_object_unref(G_OBJECT(od->pixbuf));
 831                 od->pixbuf = pixbuf;
 832                 }
 833         else
 834                 {
 835                 rt_overlay_free(rc, od);
 836                 }
 837
 838         gtk_widget_queue_draw(GTK_WIDGET(rc->pr));
 839 }
 840
 841 gboolean renderer_tiles_overlay_get(void *renderer, gint id, GdkPixbuf **pixbuf, gint *x, gint *y)
 842 {
 843         auto rt = static_cast<RendererTiles *>(renderer);
 844         PixbufRenderer *pr = rt->pr;
 845         OverlayData *od;
 846
 847         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
 848
 849         od = rt_overlay_find(rt, id);
 850         if (!od) return FALSE;
 851
 852         if (pixbuf) *pixbuf = od->pixbuf;
 853         if (x) *x = od->x;
 854         if (y) *y = od->y;
 855
 856         return TRUE;
 857 }
 858
 859 static void rt_hierarchy_changed_cb(GtkWidget *, GtkWidget *, gpointer data)
 860 {
 861         auto rt = static_cast<RendererTiles *>(data);
 862         rt_overlay_list_reset_window(rt);
 863 }
 864
 865 /*
 866  *-------------------------------------------------------------------
 867  * drawing
 868  *-------------------------------------------------------------------
 869  */
 870
 871 static GdkPixbuf *rt_get_spare_tile(RendererTiles *rt)
 872 {
 873         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);
 874         return rt->spare_tile;
 875 }
 876
 877 static void rt_tile_rotate_90_clockwise(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
 878 {
 879         GdkPixbuf *src = *tile;
 880         GdkPixbuf *dest;
 881         gint srs;
 882         gint drs;
 883         guchar *s_pix;
 884         guchar *d_pix;
 885         guchar *sp;
 886         guchar *dp;
 887         guchar *ip;
 888         guchar *spi;
 889         guchar *dpi;
 890         gint i;
 891         gint j;
 892         gint tw = rt->tile_width * rt->hidpi_scale;
 893
 894         srs = gdk_pixbuf_get_rowstride(src);
 895         s_pix = gdk_pixbuf_get_pixels(src);
 896         spi = s_pix + (x * COLOR_BYTES);
 897
 898         dest = rt_get_spare_tile(rt);
 899         drs = gdk_pixbuf_get_rowstride(dest);
 900         d_pix = gdk_pixbuf_get_pixels(dest);
 901         dpi = d_pix + (tw - 1) * COLOR_BYTES;
 902
 903         for (i = y; i < y + h; i++)
 904                 {
 905                 sp = spi + (i * srs);
 906                 ip = dpi - (i * COLOR_BYTES);
 907                 for (j = x; j < x + w; j++)
 908                         {
 909                         dp = ip + (j * drs);
 910                         memcpy(dp, sp, COLOR_BYTES);
 911                         sp += COLOR_BYTES;
 912                         }
 913                 }
 914
 915         rt->spare_tile = src;
 916         *tile = dest;
 917 }
 918
 919 static void rt_tile_rotate_90_counter_clockwise(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
 920 {
 921         GdkPixbuf *src = *tile;
 922         GdkPixbuf *dest;
 923         gint srs;
 924         gint drs;
 925         guchar *s_pix;
 926         guchar *d_pix;
 927         guchar *sp;
 928         guchar *dp;
 929         guchar *ip;
 930         guchar *spi;
 931         guchar *dpi;
 932         gint i;
 933         gint j;
 934         gint th = rt->tile_height * rt->hidpi_scale;
 935
 936         srs = gdk_pixbuf_get_rowstride(src);
 937         s_pix = gdk_pixbuf_get_pixels(src);
 938         spi = s_pix + (x * COLOR_BYTES);
 939
 940         dest = rt_get_spare_tile(rt);
 941         drs = gdk_pixbuf_get_rowstride(dest);
 942         d_pix = gdk_pixbuf_get_pixels(dest);
 943         dpi = d_pix + (th - 1) * drs;
 944
 945         for (i = y; i < y + h; i++)
 946                 {
 947                 sp = spi + (i * srs);
 948                 ip = dpi + (i * COLOR_BYTES);
 949                 for (j = x; j < x + w; j++)
 950                         {
 951                         dp = ip - (j * drs);
 952                         memcpy(dp, sp, COLOR_BYTES);
 953                         sp += COLOR_BYTES;
 954                         }
 955                 }
 956
 957         rt->spare_tile = src;
 958         *tile = dest;
 959 }
 960
 961 static void rt_tile_mirror_only(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
 962 {
 963         GdkPixbuf *src = *tile;
 964         GdkPixbuf *dest;
 965         gint srs;
 966         gint drs;
 967         guchar *s_pix;
 968         guchar *d_pix;
 969         guchar *sp;
 970         guchar *dp;
 971         guchar *spi;
 972         guchar *dpi;
 973         gint i;
 974         gint j;
 975
 976         gint tw = rt->tile_width * rt->hidpi_scale;
 977
 978         srs = gdk_pixbuf_get_rowstride(src);
 979         s_pix = gdk_pixbuf_get_pixels(src);
 980         spi = s_pix + (x * COLOR_BYTES);
 981
 982         dest = rt_get_spare_tile(rt);
 983         drs = gdk_pixbuf_get_rowstride(dest);
 984         d_pix = gdk_pixbuf_get_pixels(dest);
 985         dpi =  d_pix + (tw - x - 1) * COLOR_BYTES;
 986
 987         for (i = y; i < y + h; i++)
 988                 {
 989                 sp = spi + (i * srs);
 990                 dp = dpi + (i * drs);
 991                 for (j = 0; j < w; j++)
 992                         {
 993                         memcpy(dp, sp, COLOR_BYTES);
 994                         sp += COLOR_BYTES;
 995                         dp -= COLOR_BYTES;
 996                         }
 997                 }
 998
 999         rt->spare_tile = src;
1000         *tile = dest;
1001 }
1002
1003 static void rt_tile_mirror_and_flip(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
1004 {
1005         GdkPixbuf *src = *tile;
1006         GdkPixbuf *dest;
1007         gint srs;
1008         gint drs;
1009         guchar *s_pix;
1010         guchar *d_pix;
1011         guchar *sp;
1012         guchar *dp;
1013         guchar *dpi;
1014         gint i;
1015         gint j;
1016         gint tw = rt->tile_width * rt->hidpi_scale;
1017         gint th = rt->tile_height * rt->hidpi_scale;
1018
1019         srs = gdk_pixbuf_get_rowstride(src);
1020         s_pix = gdk_pixbuf_get_pixels(src);
1021
1022         dest = rt_get_spare_tile(rt);
1023         drs = gdk_pixbuf_get_rowstride(dest);
1024         d_pix = gdk_pixbuf_get_pixels(dest);
1025         dpi = d_pix + (th - 1) * drs + (tw - 1) * COLOR_BYTES;
1026
1027         for (i = y; i < y + h; i++)
1028                 {
1029                 sp = s_pix + (i * srs) + (x * COLOR_BYTES);
1030                 dp = dpi - (i * drs) - (x * COLOR_BYTES);
1031                 for (j = 0; j < w; j++)
1032                         {
1033                         memcpy(dp, sp, COLOR_BYTES);
1034                         sp += COLOR_BYTES;
1035                         dp -= COLOR_BYTES;
1036                         }
1037                 }
1038
1039         rt->spare_tile = src;
1040         *tile = dest;
1041 }
1042
1043 static void rt_tile_flip_only(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
1044 {
1045         GdkPixbuf *src = *tile;
1046         GdkPixbuf *dest;
1047         gint srs;
1048         gint drs;
1049         guchar *s_pix;
1050         guchar *d_pix;
1051         guchar *sp;
1052         guchar *dp;
1053         guchar *spi;
1054         guchar *dpi;
1055         gint i;
1056         gint th = rt->tile_height * rt->hidpi_scale;
1057
1058         srs = gdk_pixbuf_get_rowstride(src);
1059         s_pix = gdk_pixbuf_get_pixels(src);
1060         spi = s_pix + (x * COLOR_BYTES);
1061
1062         dest = rt_get_spare_tile(rt);
1063         drs = gdk_pixbuf_get_rowstride(dest);
1064         d_pix = gdk_pixbuf_get_pixels(dest);
1065         dpi = d_pix + (th - 1) * drs + (x * COLOR_BYTES);
1066
1067         for (i = y; i < y + h; i++)
1068                 {
1069                 sp = spi + (i * srs);
1070                 dp = dpi - (i * drs);
1071                 memcpy(dp, sp, w * COLOR_BYTES);
1072                 }
1073
1074         rt->spare_tile = src;
1075         *tile = dest;
1076 }
1077
1078 static void rt_tile_apply_orientation(RendererTiles *rt, gint orientation, GdkPixbuf **pixbuf, gint x, gint y, gint w, gint h)
1079 {
1080         switch (orientation)
1081                 {
1082                 case EXIF_ORIENTATION_TOP_LEFT:
1083                         /* normal -- nothing to do */
1084                         break;
1085                 case EXIF_ORIENTATION_TOP_RIGHT:
1086                         /* mirrored */
1087                         {
1088                                 rt_tile_mirror_only(rt, pixbuf, x, y, w, h);
1089                         }
1090                         break;
1091                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
1092                         /* upside down */
1093                         {
1094                                 rt_tile_mirror_and_flip(rt, pixbuf, x, y, w, h);
1095                         }
1096                         break;
1097                 case EXIF_ORIENTATION_BOTTOM_LEFT:
1098                         /* flipped */
1099                         {
1100                                 rt_tile_flip_only(rt, pixbuf, x, y, w, h);
1101                         }
1102                         break;
1103                 case EXIF_ORIENTATION_LEFT_TOP:
1104                         {
1105                                 rt_tile_flip_only(rt, pixbuf, x, y, w, h);
1106                                 rt_tile_rotate_90_clockwise(rt, pixbuf, x, rt->tile_height - y - h, w, h);
1107                         }
1108                         break;
1109                 case EXIF_ORIENTATION_RIGHT_TOP:
1110                         /* rotated -90 (270) */
1111                         {
1112                                 rt_tile_rotate_90_clockwise(rt, pixbuf, x, y, w, h);
1113                         }
1114                         break;
1115                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
1116                         {
1117                                 rt_tile_flip_only(rt, pixbuf, x, y, w, h);
1118                                 rt_tile_rotate_90_counter_clockwise(rt, pixbuf, x, rt->tile_height - y - h, w, h);
1119                         }
1120                         break;
1121                 case EXIF_ORIENTATION_LEFT_BOTTOM:
1122                         /* rotated 90 */
1123                         {
1124                                 rt_tile_rotate_90_counter_clockwise(rt, pixbuf, x, y, w, h);
1125                         }
1126                         break;
1127                 default:
1128                         /* The other values are out of range */
1129                         break;
1130                 }
1131 }
1132
1133 static gboolean rt_source_tile_render(RendererTiles *rt, ImageTile *it,
1134                                       gint x, gint y, gint w, gint h,
1135                                       gboolean, gboolean fast)
1136 {
1137         PixbufRenderer *pr = rt->pr;
1138         GList *list;
1139         GList *work;
1140         gboolean draw = FALSE;
1141
1142         if (pr->zoom == 1.0 || pr->scale == 1.0)
1143                 {
1144                 list = pr_source_tile_compute_region(pr, it->x + x, it->y + y, w, h, TRUE);
1145                 work = list;
1146                 while (work)
1147                         {
1148                         SourceTile *st;
1149                         gint rx;
1150                         gint ry;
1151                         gint rw;
1152                         gint rh;
1153
1154                         st = static_cast<SourceTile *>(work->data);
1155                         work = work->next;
1156
1157                         if (pr_clip_region(st->x, st->y, pr->source_tile_width, pr->source_tile_height,
1158                                            it->x + x, it->y + y, w, h,
1159                                            &rx, &ry, &rw, &rh))
1160                                 {
1161                                 cairo_t *cr;
1162                                 cr = cairo_create(it->surface);
1163                                 cairo_rectangle (cr, rx - it->x, ry - it->y, rw, rh);
1164
1165                                 if (st->blank)
1166                                         {
1167                                         cairo_set_source_rgb(cr, 0, 0, 0);
1168                                         cairo_fill (cr);
1169                                         }
1170                                 else /* (pr->zoom == 1.0 || pr->scale == 1.0) */
1171                                         {
1172                                         rt_hidpi_aware_draw(rt, cr, st->pixbuf, -it->x + st->x, -it->y + st->y);
1173                                         }
1174                                 cairo_destroy (cr);
1175                                 }
1176                         }
1177                 }
1178         else
1179                 {
1180                 gdouble scale_x;
1181                 gdouble scale_y;
1182                 gint sx;
1183                 gint sy;
1184                 gint sw;
1185                 gint sh;
1186
1187                 if (pr->image_width == 0 || pr->image_height == 0) return FALSE;
1188                 scale_x = static_cast<gdouble>(pr->width) / pr->image_width;
1189                 scale_y = static_cast<gdouble>(pr->height) / pr->image_height;
1190
1191                 sx = static_cast<gdouble>(it->x + x) / scale_x;
1192                 sy = static_cast<gdouble>(it->y + y) / scale_y;
1193                 sw = static_cast<gdouble>(w) / scale_x;
1194                 sh = static_cast<gdouble>(h) / scale_y;
1195
1196                 if (pr->width < PR_MIN_SCALE_SIZE || pr->height < PR_MIN_SCALE_SIZE) fast = TRUE;
1197
1198 #if 0
1199                 /* draws red over draw region, to check for leaks (regions not filled) */
1200                 pixbuf_set_rect_fill(it->pixbuf, x, y, w, h, 255, 0, 0, 255);
1201 #endif
1202
1203                 list = pr_source_tile_compute_region(pr, sx, sy, sw, sh, TRUE);
1204                 work = list;
1205                 while (work)
1206                         {
1207                         SourceTile *st;
1208                         gint rx;
1209                         gint ry;
1210                         gint rw;
1211                         gint rh;
1212                         gint stx;
1213                         gint sty;
1214                         gint stw;
1215                         gint sth;
1216
1217                         st = static_cast<SourceTile *>(work->data);
1218                         work = work->next;
1219
1220                         stx = floor(static_cast<gdouble>(st->x) * scale_x);
1221                         sty = floor(static_cast<gdouble>(st->y) * scale_y);
1222                         stw = ceil(static_cast<gdouble>(st->x + pr->source_tile_width) * scale_x) - stx;
1223                         sth = ceil(static_cast<gdouble>(st->y + pr->source_tile_height) * scale_y) - sty;
1224
1225                         if (pr_clip_region(stx, sty, stw, sth,
1226                                            it->x + x, it->y + y, w, h,
1227                                            &rx, &ry, &rw, &rh))
1228                                 {
1229
1230                                 if (st->blank)
1231                                         {
1232                                         cairo_t *cr;
1233                                         cr = cairo_create(it->surface);
1234                                         cairo_rectangle (cr, rx - st->x, ry - st->y, rw, rh);
1235                                         cairo_set_source_rgb(cr, 0, 0, 0);
1236                                         cairo_fill (cr);
1237                                         cairo_destroy (cr);
1238                                         }
1239                                 else
1240                                         {
1241                                         gdouble offset_x;
1242                                         gdouble offset_y;
1243
1244                                         /* may need to use unfloored stx,sty values here */
1245                                         offset_x = static_cast<gdouble>(stx - it->x);
1246                                         offset_y = static_cast<gdouble>(sty - it->y);
1247
1248                                         gdk_pixbuf_scale(st->pixbuf, it->pixbuf, rx - it->x, ry - it->y, rw, rh,
1249                                                  static_cast<gdouble>(0.0) + offset_x,
1250                                                  static_cast<gdouble>(0.0) + offset_y,
1251                                                  scale_x, scale_y,
1252                                                  (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality);
1253                                         draw = TRUE;
1254                                         }
1255                                 }
1256                         }
1257                 }
1258
1259         g_list_free(list);
1260
1261         return draw;
1262 }
1263
1264 /**
1265  * @brief
1266  * @param has_alpha
1267  * @param ignore_alpha
1268  * @param src
1269  * @param dest
1270  * @param pb_x
1271  * @param pb_y
1272  * @param pb_w
1273  * @param pb_h
1274  * @param offset_x
1275  * @param offset_y
1276  * @param scale_x
1277  * @param scale_y
1278  * @param interp_type
1279  * @param check_x
1280  * @param check_y
1281  * @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
1282  *
1283  *
1284  */
1285 static void rt_tile_get_region(gboolean has_alpha, gboolean ignore_alpha,
1286                                const GdkPixbuf *src, GdkPixbuf *dest,
1287                                int pb_x, int pb_y, int pb_w, int pb_h,
1288                                double offset_x, double offset_y, double scale_x, double scale_y,
1289                                GdkInterpType interp_type,
1290                                int check_x, int check_y, gboolean wide_image)
1291 {
1292         GdkPixbuf* tmppixbuf;
1293         gint srs;
1294         gint drs;
1295         gint x;
1296         gint y;
1297         gint c;
1298         guchar *psrc;
1299         guchar *pdst;
1300         guint32 red_1;
1301         guint32 green_1;
1302         guint32 blue_1;
1303         guint32 red_2;
1304         guint32 green_2;
1305         guint32 blue_2;
1306         guint32 alpha_1;
1307         guint32 alpha_2;
1308
1309         if (!has_alpha)
1310                 {
1311                 if (scale_x == 1.0 && scale_y == 1.0)
1312                         {
1313                         if (wide_image)
1314                                 {
1315                                 srs = gdk_pixbuf_get_rowstride(src);
1316                                 drs = gdk_pixbuf_get_rowstride(dest);
1317                                 psrc = gdk_pixbuf_get_pixels(src);
1318                                 pdst = gdk_pixbuf_get_pixels(dest);
1319                                 for (y = 0; y < pb_h; y++)
1320                                         {
1321                                         for (x = 0; x < pb_w; x++)
1322                                                 {
1323                                                 for (c = 0; c < 3; c++)
1324                                                         {
1325                                                         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];
1326                                                         }
1327                                                 }
1328                                         }
1329                                 }
1330                         else
1331                                 {
1332                                 gdk_pixbuf_copy_area(src,
1333                                                                         -offset_x + pb_x, -offset_y + pb_y,
1334                                                                         pb_w, pb_h,
1335                                                                         dest,
1336                                                                         pb_x, pb_y);
1337                                         }
1338                         }
1339                 else
1340                         {
1341                         gdk_pixbuf_scale(src, dest,
1342                                                         pb_x, pb_y, pb_w, pb_h,
1343                                                         offset_x,
1344                                                         offset_y,
1345                                                         scale_x, scale_y,
1346                                                         (wide_image && interp_type == GDK_INTERP_NEAREST) ? GDK_INTERP_TILES : interp_type);
1347                         }
1348                 }
1349         else
1350                 {
1351                 red_1=static_cast<guint32>(options->image.alpha_color_1.red * 255) << 16 & 0x00FF0000;
1352                 green_1=static_cast<guint32>(options->image.alpha_color_1.green * 255) << 8 & 0x0000FF00;
1353                 blue_1=static_cast<guint32>(options->image.alpha_color_1.blue * 255) & 0x000000FF;
1354                 red_2=static_cast<guint32>(options->image.alpha_color_2.red * 255) << 16 & 0x00FF0000;
1355                 green_2=static_cast<guint32>(options->image.alpha_color_2.green * 255) << 8 & 0x0000FF00;
1356                 blue_2=static_cast<guint32>(options->image.alpha_color_2.blue * 255) & 0x000000FF;
1357                 alpha_1 = red_1 + green_1 + blue_1;
1358                 alpha_2 = red_2 + green_2 + blue_2;
1359
1360                 if (ignore_alpha)
1361                         {
1362                         tmppixbuf = gdk_pixbuf_add_alpha(src, FALSE, 0, 0, 0);
1363
1364                         pixbuf_ignore_alpha_rect(tmppixbuf, 0, 0, gdk_pixbuf_get_width(src), gdk_pixbuf_get_height(src));
1365
1366                         gdk_pixbuf_composite_color(tmppixbuf, dest,
1367                                         pb_x, pb_y, pb_w, pb_h,
1368                                         offset_x,
1369                                         offset_y,
1370                                         scale_x, scale_y,
1371                                         (scale_x == 1.0 && scale_y == 1.0) ? GDK_INTERP_NEAREST : interp_type,
1372                                         255, check_x, check_y,
1373                                         PR_ALPHA_CHECK_SIZE,
1374                                         alpha_1,
1375                                         alpha_2);
1376                         g_object_unref(tmppixbuf);
1377                         }
1378                 else
1379                         {
1380                         gdk_pixbuf_composite_color(src, dest,
1381                                         pb_x, pb_y, pb_w, pb_h,
1382                                         offset_x,
1383                                         offset_y,
1384                                         scale_x, scale_y,
1385                                         (scale_x == 1.0 && scale_y == 1.0) ? GDK_INTERP_NEAREST : interp_type,
1386                                         255, check_x, check_y,
1387                                         PR_ALPHA_CHECK_SIZE,
1388                                         alpha_1,
1389                                         alpha_2);
1390                         }
1391                 }
1392 }
1393
1394
1395 static gint rt_get_orientation(RendererTiles *rt)
1396 {
1397         PixbufRenderer *pr = rt->pr;
1398
1399         gint orientation = pr->orientation;
1400         static const gint mirror[]       = {1,   2, 1, 4, 3, 6, 5, 8, 7};
1401         static const gint flip[]         = {1,   4, 3, 2, 1, 8, 7, 6, 5};
1402
1403         if (rt->stereo_mode & PR_STEREO_MIRROR) orientation = mirror[orientation];
1404         if (rt->stereo_mode & PR_STEREO_FLIP) orientation = flip[orientation];
1405         return orientation;
1406 }
1407
1408
1409 static void rt_tile_render(RendererTiles *rt, ImageTile *it,
1410                            gint x, gint y, gint w, gint h,
1411                            gboolean new_data, gboolean fast)
1412 {
1413         PixbufRenderer *pr = rt->pr;
1414         gboolean has_alpha;
1415         gboolean draw = FALSE;
1416         gint orientation = rt_get_orientation(rt);
1417         gboolean wide_image = FALSE;
1418
1419         if (it->render_todo == TILE_RENDER_NONE && it->surface && !new_data) return;
1420
1421         if (it->render_done != TILE_RENDER_ALL)
1422                 {
1423                 x = 0;
1424                 y = 0;
1425                 w = it->w;
1426                 h = it->h;
1427                 if (!fast) it->render_done = TILE_RENDER_ALL;
1428                 }
1429         else if (it->render_todo != TILE_RENDER_AREA)
1430                 {
1431                 if (!fast) it->render_todo = TILE_RENDER_NONE;
1432                 return;
1433                 }
1434
1435         if (!fast) it->render_todo = TILE_RENDER_NONE;
1436
1437         if (new_data) it->blank = FALSE;
1438
1439         rt_tile_prepare(rt, it);
1440         has_alpha = (pr->pixbuf && gdk_pixbuf_get_has_alpha(pr->pixbuf));
1441
1442         /** @FIXME checker colors for alpha should be configurable,
1443          * also should be drawn for blank = TRUE
1444          */
1445
1446         if (it->blank)
1447                 {
1448                 /* no data, do fast rect fill */
1449                 cairo_t *cr;
1450                 cr = cairo_create(it->surface);
1451                 cairo_rectangle (cr, 0, 0, it->w, it->h);
1452                 cairo_set_source_rgb(cr, 0, 0, 0);
1453                 cairo_fill (cr);
1454                 cairo_destroy (cr);
1455                 }
1456         else if (pr->source_tiles_enabled)
1457                 {
1458                 draw = rt_source_tile_render(rt, it, x, y, w, h, new_data, fast);
1459                 }
1460         else
1461                 {
1462                 gdouble scale_x;
1463                 gdouble scale_y;
1464                 gdouble src_x;
1465                 gdouble src_y;
1466                 gint pb_x;
1467                 gint pb_y;
1468                 gint pb_w;
1469                 gint pb_h;
1470
1471                 if (pr->image_width == 0 || pr->image_height == 0) return;
1472
1473                 scale_x = rt->hidpi_scale * static_cast<gdouble>(pr->width) / pr->image_width;
1474                 scale_y = rt->hidpi_scale * static_cast<gdouble>(pr->height) / pr->image_height;
1475
1476                 pr_tile_coords_map_orientation(orientation, it->x, it->y,
1477                                             pr->width, pr->height,
1478                                             rt->tile_width, rt->tile_height,
1479                                             &src_x, &src_y);
1480                 pr_tile_region_map_orientation(orientation, x, y,
1481                                             rt->tile_width, rt->tile_height,
1482                                             w, h,
1483                                             &pb_x, &pb_y,
1484                                             &pb_w, &pb_h);
1485
1486                 src_x *= rt->hidpi_scale;
1487                 src_y *= rt->hidpi_scale;
1488                 pb_x *= rt->hidpi_scale;
1489                 pb_y *= rt->hidpi_scale;
1490                 pb_w *= rt->hidpi_scale;
1491                 pb_h *= rt->hidpi_scale;
1492
1493                 switch (orientation)
1494                         {
1495                         case EXIF_ORIENTATION_LEFT_TOP:
1496                         case EXIF_ORIENTATION_RIGHT_TOP:
1497                         case EXIF_ORIENTATION_RIGHT_BOTTOM:
1498                         case EXIF_ORIENTATION_LEFT_BOTTOM:
1499                                 std::swap(scale_x, scale_y);
1500                                 break;
1501                         default:
1502                                 /* nothing to do */
1503                                 break;
1504                         }
1505
1506                 /* HACK: The pixbuf scalers get kinda buggy(crash) with extremely
1507                  * small sizes for anything but GDK_INTERP_NEAREST
1508                  */
1509                 if (pr->width < PR_MIN_SCALE_SIZE || pr->height < PR_MIN_SCALE_SIZE) fast = TRUE;
1510                 if (pr->image_width > 32767) wide_image = TRUE;
1511
1512                 rt_tile_get_region(has_alpha, pr->ignore_alpha,
1513                                    pr->pixbuf, it->pixbuf, pb_x, pb_y, pb_w, pb_h,
1514                                    static_cast<gdouble>(0.0) - src_x - get_right_pixbuf_offset(rt) * scale_x,
1515                                    static_cast<gdouble>(0.0) - src_y,
1516                                    scale_x, scale_y,
1517                                    (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality,
1518                                    it->x + pb_x, it->y + pb_y, wide_image);
1519                 if (rt->stereo_mode & PR_STEREO_ANAGLYPH &&
1520                     (pr->stereo_pixbuf_offset_right > 0 || pr->stereo_pixbuf_offset_left > 0))
1521                         {
1522                         GdkPixbuf *right_pb = rt_get_spare_tile(rt);
1523                         rt_tile_get_region(has_alpha, pr->ignore_alpha,
1524                                            pr->pixbuf, right_pb, pb_x, pb_y, pb_w, pb_h,
1525                                            static_cast<gdouble>(0.0) - src_x - get_left_pixbuf_offset(rt) * scale_x,
1526                                            static_cast<gdouble>(0.0) - src_y,
1527                                            scale_x, scale_y,
1528                                            (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality,
1529                                            it->x + pb_x, it->y + pb_y, wide_image);
1530                         pr_create_anaglyph(rt->stereo_mode, it->pixbuf, right_pb, pb_x, pb_y, pb_w, pb_h);
1531                         /* do not care about freeing spare_tile, it will be reused */
1532                         }
1533                 rt_tile_apply_orientation(rt, orientation, &it->pixbuf, pb_x, pb_y, pb_w, pb_h);
1534                 draw = TRUE;
1535                 }
1536
1537         if (draw && it->pixbuf && !it->blank)
1538                 {
1539                 cairo_t *cr;
1540
1541                 if (pr->func_post_process && (!pr->post_process_slow || !fast))
1542                         pr->func_post_process(pr, &it->pixbuf, x, y, w, h, pr->post_process_user_data);
1543
1544                 cr = cairo_create(it->surface);
1545                 cairo_rectangle (cr, x, y, w, h);
1546                 rt_hidpi_aware_draw(rt, cr, it->pixbuf, 0, 0);
1547                 cairo_destroy (cr);
1548                 }
1549 }
1550
1551
1552 static void rt_tile_expose(RendererTiles *rt, ImageTile *it,
1553                            gint x, gint y, gint w, gint h,
1554                            gboolean new_data, gboolean fast)
1555 {
1556         PixbufRenderer *pr = rt->pr;
1557         cairo_t *cr;
1558
1559         /* clamp to visible */
1560         if (it->x + x < rt->x_scroll)
1561                 {
1562                 w -= rt->x_scroll - it->x - x;
1563                 x = rt->x_scroll - it->x;
1564                 }
1565         if (it->x + x + w > rt->x_scroll + pr->vis_width)
1566                 {
1567                 w = rt->x_scroll + pr->vis_width - it->x - x;
1568                 }
1569         if (w < 1) return;
1570         if (it->y + y < rt->y_scroll)
1571                 {
1572                 h -= rt->y_scroll - it->y - y;
1573                 y = rt->y_scroll - it->y;
1574                 }
1575         if (it->y + y + h > rt->y_scroll + pr->vis_height)
1576                 {
1577                 h = rt->y_scroll + pr->vis_height - it->y - y;
1578                 }
1579         if (h < 1) return;
1580
1581         rt_tile_render(rt, it, x, y, w, h, new_data, fast);
1582
1583         cr = cairo_create(rt->surface);
1584         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);
1585         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);
1586         cairo_fill (cr);
1587         cairo_destroy (cr);
1588
1589         if (rt->overlay_list)
1590                 {
1591                 rt_overlay_draw(rt, pr->x_offset + (it->x - rt->x_scroll) + x,
1592                                 pr->y_offset + (it->y - rt->y_scroll) + y,
1593                                 w, h,
1594                                 it);
1595                 }
1596
1597         gtk_widget_queue_draw(GTK_WIDGET(rt->pr));
1598 }
1599
1600
1601 static gboolean rt_tile_is_visible(RendererTiles *rt, ImageTile *it)
1602 {
1603         PixbufRenderer *pr = rt->pr;
1604         return (it->x + it->w >= rt->x_scroll && it->x < rt->x_scroll + pr->vis_width &&
1605                 it->y + it->h >= rt->y_scroll && it->y < rt->y_scroll + pr->vis_height);
1606 }
1607
1608 /*
1609  *-------------------------------------------------------------------
1610  * draw queue
1611  *-------------------------------------------------------------------
1612  */
1613
1614 static gint rt_get_queued_area(GList *work)
1615 {
1616         gint area = 0;
1617
1618         while (work)
1619                 {
1620                 auto qd = static_cast<QueueData *>(work->data);
1621                 area += qd->w * qd->h;
1622                 work = work->next;
1623                 }
1624         return area;
1625 }
1626
1627
1628 static gboolean rt_queue_schedule_next_draw(RendererTiles *rt, gboolean force_set)
1629 {
1630         PixbufRenderer *pr = rt->pr;
1631         gfloat percent;
1632         gint visible_area = pr->vis_width * pr->vis_height;
1633
1634         if (!pr->loading)
1635                 {
1636                 /* 2pass prio */
1637                 DEBUG_2("redraw priority: 2pass");
1638                 rt->draw_idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, rt_queue_draw_idle_cb, rt, nullptr);
1639                 return G_SOURCE_REMOVE;
1640                 }
1641
1642         if (visible_area == 0)
1643                 {
1644                 /* not known yet */
1645                 percent = 100.0;
1646                 }
1647         else
1648                 {
1649                 percent = 100.0 * rt_get_queued_area(rt->draw_queue) / visible_area;
1650                 }
1651
1652         if (percent > 10.0)
1653                 {
1654                 /* we have enough data for starting intensive redrawing */
1655                 DEBUG_2("redraw priority: high %.2f %%", percent);
1656                 rt->draw_idle_id = g_idle_add_full(GDK_PRIORITY_REDRAW, rt_queue_draw_idle_cb, rt, nullptr);
1657                 return G_SOURCE_REMOVE;
1658                 }
1659
1660         if (percent < 1.0 || force_set)
1661                 {
1662                 /* queue is (almost) empty, wait  50 ms*/
1663                 DEBUG_2("redraw priority: wait %.2f %%", percent);
1664                 rt->draw_idle_id = g_timeout_add_full(G_PRIORITY_DEFAULT_IDLE, 50, rt_queue_draw_idle_cb, rt, nullptr);
1665                 return G_SOURCE_REMOVE;
1666                 }
1667
1668         /* keep the same priority as before */
1669         DEBUG_2("redraw priority: no change %.2f %%", percent);
1670         return G_SOURCE_CONTINUE;
1671 }
1672
1673
1674 static gboolean rt_queue_draw_idle_cb(gpointer data)
1675 {
1676         auto rt = static_cast<RendererTiles *>(data);
1677         PixbufRenderer *pr = rt->pr;
1678         QueueData *qd;
1679         gboolean fast;
1680
1681
1682         if ((!pr->pixbuf && !pr->source_tiles_enabled) ||
1683             (!rt->draw_queue && !rt->draw_queue_2pass) ||
1684             !rt->draw_idle_id)
1685                 {
1686                 pr_render_complete_signal(pr);
1687
1688                 rt->draw_idle_id = 0;
1689                 return G_SOURCE_REMOVE;
1690                 }
1691
1692         if (rt->draw_queue)
1693                 {
1694                 qd = static_cast<QueueData *>(rt->draw_queue->data);
1695                 fast = (pr->zoom_2pass && ((pr->zoom_quality != GDK_INTERP_NEAREST && pr->scale != 1.0) || pr->post_process_slow));
1696                 }
1697         else
1698                 {
1699                 if (pr->loading)
1700                         {
1701                         /* still loading, wait till done (also drops the higher priority) */
1702
1703                         return rt_queue_schedule_next_draw(rt, FALSE);
1704                         }
1705
1706                 qd = static_cast<QueueData *>(rt->draw_queue_2pass->data);
1707                 fast = FALSE;
1708                 }
1709
1710         if (gtk_widget_get_realized(GTK_WIDGET(pr)))
1711                 {
1712                 if (rt_tile_is_visible(rt, qd->it))
1713                         {
1714                         rt_tile_expose(rt, qd->it, qd->x, qd->y, qd->w, qd->h, qd->new_data, fast);
1715                         }
1716                 else if (qd->new_data)
1717                         {
1718                         /* if new pixel data, and we already have a pixmap, update the tile */
1719                         qd->it->blank = FALSE;
1720                         if (qd->it->surface && qd->it->render_done == TILE_RENDER_ALL)
1721                                 {
1722                                 rt_tile_render(rt, qd->it, qd->x, qd->y, qd->w, qd->h, qd->new_data, fast);
1723                                 }
1724                         }
1725                 }
1726
1727         if (rt->draw_queue)
1728                 {
1729                 qd->it->qd = nullptr;
1730                 rt->draw_queue = g_list_remove(rt->draw_queue, qd);
1731                 if (fast)
1732                         {
1733                         if (qd->it->qd2)
1734                                 {
1735                                 rt_queue_merge(qd->it->qd2, qd);
1736                                 g_free(qd);
1737                                 }
1738                         else
1739                                 {
1740                                 qd->it->qd2 = qd;
1741                                 rt->draw_queue_2pass = g_list_append(rt->draw_queue_2pass, qd);
1742                                 }
1743                         }
1744                 else
1745                         {
1746                         g_free(qd);
1747                         }
1748                 }
1749         else
1750                 {
1751                 qd->it->qd2 = nullptr;
1752                 rt->draw_queue_2pass = g_list_remove(rt->draw_queue_2pass, qd);
1753                 g_free(qd);
1754                 }
1755
1756         if (!rt->draw_queue && !rt->draw_queue_2pass)
1757                 {
1758                 pr_render_complete_signal(pr);
1759
1760                 rt->draw_idle_id = 0;
1761                 return G_SOURCE_REMOVE;
1762                 }
1763
1764                 return rt_queue_schedule_next_draw(rt, FALSE);
1765 }
1766
1767 static void rt_queue_data_free(gpointer data)
1768 {
1769         auto *qd = static_cast<QueueData *>(data);
1770
1771         qd->it->qd = nullptr;
1772         qd->it->qd2 = nullptr;
1773         g_free(qd);
1774 }
1775
1776 static void rt_queue_clear(RendererTiles *rt)
1777 {
1778         g_list_free_full(rt->draw_queue, rt_queue_data_free);
1779         rt->draw_queue = nullptr;
1780
1781         g_list_free_full(rt->draw_queue_2pass, rt_queue_data_free);
1782         rt->draw_queue_2pass = nullptr;
1783
1784         if (rt->draw_idle_id)
1785                 {
1786                 g_source_remove(rt->draw_idle_id);
1787                 rt->draw_idle_id = 0;
1788                 }
1789         rt_sync_scroll(rt);
1790 }
1791
1792 static void rt_queue_merge(QueueData *parent, QueueData *qd)
1793 {
1794         if (parent->x + parent->w < qd->x + qd->w)
1795                 {
1796                 parent->w += (qd->x + qd->w) - (parent->x + parent->w);
1797                 }
1798         if (parent->x > qd->x)
1799                 {
1800                 parent->w += parent->x - qd->x;
1801                 parent->x = qd->x;
1802                 }
1803
1804         if (parent->y + parent->h < qd->y + qd->h)
1805                 {
1806                 parent->h += (qd->y + qd->h) - (parent->y + parent->h);
1807                 }
1808         if (parent->y > qd->y)
1809                 {
1810                 parent->h += parent->y - qd->y;
1811                 parent->y = qd->y;
1812                 }
1813
1814         parent->new_data |= qd->new_data;
1815 }
1816
1817 static gboolean rt_clamp_to_visible(RendererTiles *rt, gint *x, gint *y, gint *w, gint *h)
1818 {
1819         PixbufRenderer *pr = rt->pr;
1820         gint nx;
1821         gint ny;
1822         gint nw;
1823         gint nh;
1824         gint vx;
1825         gint vy;
1826         gint vw;
1827         gint vh;
1828
1829         vw = pr->vis_width;
1830         vh = pr->vis_height;
1831
1832         vx = rt->x_scroll;
1833         vy = rt->y_scroll;
1834
1835         if (*x + *w < vx || *x > vx + vw || *y + *h < vy || *y > vy + vh) return FALSE;
1836
1837         /* now clamp it */
1838         nx = CLAMP(*x, vx, vx + vw);
1839         nw = CLAMP(*w - (nx - *x), 1, vw);
1840
1841         ny = CLAMP(*y, vy, vy + vh);
1842         nh = CLAMP(*h - (ny - *y), 1, vh);
1843
1844         *x = nx;
1845         *y = ny;
1846         *w = nw;
1847         *h = nh;
1848
1849         return TRUE;
1850 }
1851
1852 static gboolean rt_queue_to_tiles(RendererTiles *rt, gint x, gint y, gint w, gint h,
1853                                   gboolean clamp, ImageRenderType render,
1854                                   gboolean new_data, gboolean only_existing)
1855 {
1856         PixbufRenderer *pr = rt->pr;
1857         gint i;
1858         gint j;
1859         gint x1;
1860         gint x2;
1861         gint y1;
1862         gint y2;
1863
1864         if (clamp && !rt_clamp_to_visible(rt, &x, &y, &w, &h)) return FALSE;
1865
1866         x1 = ROUND_DOWN(x, rt->tile_width);
1867         x2 = ROUND_UP(x + w, rt->tile_width);
1868
1869         y1 = ROUND_DOWN(y, rt->tile_height);
1870         y2 = ROUND_UP(y + h, rt->tile_height);
1871
1872         for (j = y1; j <= y2; j += rt->tile_height)
1873                 {
1874                 for (i = x1; i <= x2; i += rt->tile_width)
1875                         {
1876                         ImageTile *it;
1877
1878                         it = rt_tile_get(rt, i, j,
1879                                          (only_existing &&
1880                                           (i + rt->tile_width < rt->x_scroll ||
1881                                            i > rt->x_scroll + pr->vis_width ||
1882                                            j + rt->tile_height < rt->y_scroll ||
1883                                            j > rt->y_scroll + pr->vis_height)));
1884                         if (it)
1885                                 {
1886                                 if ((render == TILE_RENDER_ALL && it->render_done != TILE_RENDER_ALL) ||
1887                                     (render == TILE_RENDER_AREA && it->render_todo != TILE_RENDER_ALL))
1888                                         {
1889                                         it->render_todo = render;
1890                                         }
1891
1892                                 auto qd = g_new(QueueData, 1);
1893                                 qd->it = it;
1894                                 qd->new_data = new_data;
1895
1896                                 if (i < x)
1897                                         {
1898                                         qd->x = x - i;
1899                                         }
1900                                 else
1901                                         {
1902                                         qd->x = 0;
1903                                         }
1904                                 qd->w = x + w - i - qd->x;
1905                                 if (qd->x + qd->w > rt->tile_width) qd->w = rt->tile_width - qd->x;
1906
1907                                 if (j < y)
1908                                         {
1909                                         qd->y = y - j;
1910                                         }
1911                                 else
1912                                         {
1913                                         qd->y = 0;
1914                                         }
1915                                 qd->h = y + h - j - qd->y;
1916                                 if (qd->y + qd->h > rt->tile_height) qd->h = rt->tile_height - qd->y;
1917
1918                                 if (qd->w < 1 || qd->h < 1)
1919                                         {
1920                                         g_free(qd);
1921                                         }
1922                                 else if (it->qd)
1923                                         {
1924                                         rt_queue_merge(it->qd, qd);
1925                                         g_free(qd);
1926                                         }
1927                                 else
1928                                         {
1929                                         it->qd = qd;
1930                                         rt->draw_queue = g_list_append(rt->draw_queue, qd);
1931                                         }
1932                                 }
1933                         }
1934                 }
1935
1936         return TRUE;
1937 }
1938
1939 static void rt_queue(RendererTiles *rt, gint x, gint y, gint w, gint h,
1940                      gboolean clamp, ImageRenderType render,
1941                      gboolean new_data, gboolean only_existing)
1942 {
1943         PixbufRenderer *pr = rt->pr;
1944         gint nx;
1945         gint ny;
1946
1947         rt_sync_scroll(rt);
1948
1949         nx = CLAMP(x, 0, pr->width - 1);
1950         ny = CLAMP(y, 0, pr->height - 1);
1951         w -= (nx - x);
1952         h -= (ny - y);
1953         w = CLAMP(w, 0, pr->width - nx);
1954         h = CLAMP(h, 0, pr->height - ny);
1955         if (w < 1 || h < 1) return;
1956
1957         if (rt_queue_to_tiles(rt, nx, ny, w, h, clamp, render, new_data, only_existing) &&
1958             ((!rt->draw_queue && !rt->draw_queue_2pass) || !rt->draw_idle_id))
1959                 {
1960                 if (rt->draw_idle_id)
1961                         {
1962                         g_source_remove(rt->draw_idle_id);
1963                         rt->draw_idle_id = 0;
1964                         }
1965                 rt_queue_schedule_next_draw(rt, TRUE);
1966                 }
1967 }
1968
1969 static void rt_scroll(void *renderer, gint x_off, gint y_off)
1970 {
1971         auto rt = static_cast<RendererTiles *>(renderer);
1972         PixbufRenderer *pr = rt->pr;
1973
1974         rt_sync_scroll(rt);
1975         if (rt->stereo_mode & PR_STEREO_MIRROR) x_off = -x_off;
1976         if (rt->stereo_mode & PR_STEREO_FLIP) y_off = -y_off;
1977
1978         gint w = pr->vis_width - abs(x_off);
1979         gint h = pr->vis_height - abs(y_off);
1980
1981         if (w < 1 || h < 1)
1982                 {
1983                 /* scrolled completely to new material */
1984                 rt_queue(rt, 0, 0, pr->width, pr->height, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
1985                 return;
1986                 }
1987
1988                 gint x1;
1989                 gint y1;
1990                 gint x2;
1991                 gint y2;
1992                 cairo_t *cr;
1993                 cairo_surface_t *surface;
1994
1995                 if (x_off < 0)
1996                         {
1997                         x1 = abs(x_off);
1998                         x2 = 0;
1999                         }
2000                 else
2001                         {
2002                         x1 = 0;
2003                         x2 = abs(x_off);
2004                         }
2005
2006                 if (y_off < 0)
2007                         {
2008                         y1 = abs(y_off);
2009                         y2 = 0;
2010                         }
2011                 else
2012                         {
2013                         y1 = 0;
2014                         y2 = abs(y_off);
2015                         }
2016
2017                 cr = cairo_create(rt->surface);
2018                 surface = rt->surface;
2019
2020                 /* clipping restricts the intermediate surface's size, so it's a good idea
2021                  * to use it. */
2022                 cairo_rectangle(cr, x1 + pr->x_offset + rt->stereo_off_x, y1 + pr->y_offset + rt->stereo_off_y, w, h);
2023                 cairo_clip (cr);
2024                 /* Now push a group to change the target */
2025                 cairo_push_group (cr);
2026                 cairo_set_source_surface(cr, surface, x1 - x2, y1 - y2);
2027                 cairo_paint(cr);
2028                 /* Now copy the intermediate target back */
2029                 cairo_pop_group_to_source(cr);
2030                 cairo_paint(cr);
2031                 cairo_destroy(cr);
2032
2033                 rt_overlay_queue_all(rt, x2, y2, x1, y1);
2034
2035                 w = pr->vis_width - w;
2036                 h = pr->vis_height - h;
2037
2038                 if (w > 0)
2039                         {
2040                         rt_queue(rt,
2041                                     x_off > 0 ? rt->x_scroll + (pr->vis_width - w) : rt->x_scroll, rt->y_scroll,
2042                                     w, pr->vis_height, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
2043                         }
2044                 if (h > 0)
2045                         {
2046                         /** @FIXME to optimize this, remove overlap */
2047                         rt_queue(rt,
2048                                     rt->x_scroll, y_off > 0 ? rt->y_scroll + (pr->vis_height - h) : rt->y_scroll,
2049                                     pr->vis_width, h, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
2050                         }
2051 }
2052
2053 static void renderer_area_changed(void *renderer, gint src_x, gint src_y, gint src_w, gint src_h)
2054 {
2055         auto rt = static_cast<RendererTiles *>(renderer);
2056         PixbufRenderer *pr = rt->pr;
2057         gint x;
2058         gint y;
2059         gint width;
2060         gint height;
2061         gint x1;
2062         gint y1;
2063         gint x2;
2064         gint y2;
2065
2066         gint orientation = rt_get_orientation(rt);
2067         pr_coords_map_orientation_reverse(orientation,
2068                                           src_x - get_right_pixbuf_offset(rt), src_y,
2069                                           pr->image_width, pr->image_height,
2070                                           src_w, src_h,
2071                                           &x, &y,
2072                                           &width, &height);
2073
2074         if (pr->scale != 1.0 && pr->zoom_quality != GDK_INTERP_NEAREST)
2075                 {
2076                 /* increase region when using a zoom quality that may access surrounding pixels */
2077                 y -= 1;
2078                 height += 2;
2079                 }
2080
2081         x1 = static_cast<gint>(floor(static_cast<gdouble>(x) * pr->scale));
2082         y1 = static_cast<gint>(floor(static_cast<gdouble>(y) * pr->scale * pr->aspect_ratio));
2083         x2 = static_cast<gint>(ceil(static_cast<gdouble>(x + width) * pr->scale));
2084         y2 = static_cast<gint>(ceil(static_cast<gdouble>(y + height) * pr->scale * pr->aspect_ratio));
2085
2086         rt_queue(rt, x1, y1, x2 - x1, y2 - y1, FALSE, TILE_RENDER_AREA, TRUE, TRUE);
2087 }
2088
2089 static void renderer_redraw(RendererTiles *rt, gint x, gint y, gint w, gint h,
2090                      gint clamp, ImageRenderType render, gboolean new_data, gboolean only_existing)
2091 {
2092         PixbufRenderer *pr = rt->pr;
2093
2094         x -= rt->stereo_off_x;
2095         y -= rt->stereo_off_y;
2096
2097         rt_border_draw(rt, x, y, w, h);
2098
2099         x = MAX(0, x - pr->x_offset + pr->x_scroll);
2100         y = MAX(0, y - pr->y_offset + pr->y_scroll);
2101
2102         rt_queue(rt,
2103                  x, y,
2104                  MIN(w, pr->width - x),
2105                  MIN(h, pr->height - y),
2106                  clamp, render, new_data, only_existing);
2107 }
2108
2109 static void renderer_update_pixbuf(void *renderer, gboolean)
2110 {
2111         rt_queue_clear(static_cast<RendererTiles *>(renderer));
2112 }
2113
2114 static void renderer_update_zoom(void *renderer, gboolean lazy)
2115 {
2116         auto rt = static_cast<RendererTiles *>(renderer);
2117         PixbufRenderer *pr = rt->pr;
2118
2119         rt_tile_invalidate_all(static_cast<RendererTiles *>(renderer));
2120         if (!lazy)
2121                 {
2122                 renderer_redraw(static_cast<RendererTiles *>(renderer), 0, 0, pr->width, pr->height, TRUE, TILE_RENDER_ALL, TRUE, FALSE);
2123                 }
2124         rt_border_clear(rt);
2125 }
2126
2127 static void renderer_invalidate_region(void *renderer, gint x, gint y, gint w, gint h)
2128 {
2129         rt_tile_invalidate_region(static_cast<RendererTiles *>(renderer), x, y, w, h);
2130 }
2131
2132 static void renderer_update_viewport(void *renderer)
2133 {
2134         auto rt = static_cast<RendererTiles *>(renderer);
2135
2136         rt->stereo_off_x = 0;
2137         rt->stereo_off_y = 0;
2138
2139         if (rt->stereo_mode & PR_STEREO_RIGHT)
2140                 {
2141                 if (rt->stereo_mode & PR_STEREO_HORIZ)
2142                         {
2143                         rt->stereo_off_x = rt->pr->viewport_width;
2144                         }
2145                 else if (rt->stereo_mode & PR_STEREO_VERT)
2146                         {
2147                         rt->stereo_off_y = rt->pr->viewport_height;
2148                         }
2149                 else if (rt->stereo_mode & PR_STEREO_FIXED)
2150                         {
2151                         rt->stereo_off_x = rt->pr->stereo_fixed_x_right;
2152                         rt->stereo_off_y = rt->pr->stereo_fixed_y_right;
2153                         }
2154                 }
2155         else
2156                 {
2157                 if (rt->stereo_mode & PR_STEREO_FIXED)
2158                         {
2159                         rt->stereo_off_x = rt->pr->stereo_fixed_x_left;
2160                         rt->stereo_off_y = rt->pr->stereo_fixed_y_left;
2161                         }
2162                 }
2163         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);
2164         rt_sync_scroll(rt);
2165         rt_overlay_update_sizes(rt);
2166         rt_border_clear(rt);
2167 }
2168
2169 static void renderer_stereo_set(void *renderer, gint stereo_mode)
2170 {
2171         auto rt = static_cast<RendererTiles *>(renderer);
2172
2173         rt->stereo_mode = stereo_mode;
2174 }
2175
2176 static void renderer_free(void *renderer)
2177 {
2178         auto rt = static_cast<RendererTiles *>(renderer);
2179         rt_queue_clear(rt);
2180         rt_tile_free_all(rt);
2181         if (rt->spare_tile) g_object_unref(rt->spare_tile);
2182         if (rt->overlay_buffer) g_object_unref(rt->overlay_buffer);
2183         rt_overlay_list_clear(rt);
2184         /* disconnect "hierarchy-changed" */
2185         g_signal_handlers_disconnect_matched(G_OBJECT(rt->pr), G_SIGNAL_MATCH_DATA,
2186                                                      0, 0, nullptr, nullptr, rt);
2187         g_free(rt);
2188 }
2189
2190 static gboolean rt_realize_cb(GtkWidget *widget, gpointer data)
2191 {
2192         auto rt = static_cast<RendererTiles *>(data);
2193         cairo_t *cr;
2194
2195         if (!rt->surface)
2196                 {
2197                 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));
2198
2199                 cr = cairo_create(rt->surface);
2200                 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));
2201                 cairo_paint(cr);
2202                 cairo_destroy(cr);
2203                 }
2204
2205         return FALSE;
2206 }
2207
2208 static gboolean rt_size_allocate_cb(GtkWidget *widget,  GdkRectangle *allocation, gpointer data)
2209 {
2210         auto rt = static_cast<RendererTiles *>(data);
2211         cairo_t *cr;
2212         cairo_surface_t *old_surface;
2213
2214         if (gtk_widget_get_realized(GTK_WIDGET(rt->pr)))
2215                 {
2216                 old_surface = rt->surface;
2217                 rt->surface = gdk_window_create_similar_surface(gtk_widget_get_window(widget), CAIRO_CONTENT_COLOR, allocation->width, allocation->height);
2218
2219                 cr = cairo_create(rt->surface);
2220
2221                 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));
2222                 cairo_paint(cr);
2223                 cairo_set_source_surface(cr, old_surface, 0, 0);
2224                 cairo_paint(cr);
2225                 cairo_destroy(cr);
2226                 cairo_surface_destroy(old_surface);
2227
2228                 renderer_redraw(rt, allocation->x, allocation->y, allocation->width, allocation->height, FALSE, TILE_RENDER_ALL, FALSE, FALSE);
2229         }
2230
2231         return FALSE;
2232 }
2233
2234 static gboolean rt_draw_cb(GtkWidget *, cairo_t *cr, gpointer data)
2235 {
2236         auto rt = static_cast<RendererTiles *>(data);
2237         GList *work;
2238         OverlayData *od;
2239
2240         if (rt->stereo_mode & (PR_STEREO_HORIZ | PR_STEREO_VERT))
2241                 {
2242                 cairo_push_group(cr);
2243                 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));
2244
2245                 if (rt->stereo_mode & PR_STEREO_HORIZ)
2246                         {
2247                         cairo_rectangle(cr, rt->stereo_off_x, 0, rt->pr->viewport_width, rt->pr->viewport_height);
2248                         }
2249                 else
2250                         {
2251                         cairo_rectangle(cr, 0, rt->stereo_off_y, rt->pr->viewport_width, rt->pr->viewport_height);
2252                         }
2253                 cairo_clip(cr);
2254                 cairo_paint(cr);
2255
2256                 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);
2257                 cairo_clip(cr);
2258                 cairo_set_source_surface(cr, rt->surface, 0, 0);
2259                 cairo_paint(cr);
2260
2261                 cairo_pop_group_to_source(cr);
2262                 cairo_paint(cr);
2263                 }
2264         else
2265                 {
2266                 cairo_set_source_surface(cr, rt->surface, 0, 0);
2267                 cairo_paint(cr);
2268                 }
2269
2270         work = rt->overlay_list;
2271         while (work)
2272                 {
2273                 od = static_cast<OverlayData *>(work->data);
2274                 gint px;
2275                 gint py;
2276                 gint pw;
2277                 gint ph;
2278
2279                 rt_overlay_get_position(rt, od, px, py, pw, ph);
2280
2281                 gdk_cairo_set_source_pixbuf(cr, od->pixbuf, px, py);
2282                 cairo_paint(cr);
2283                 work = work->next;
2284                 }
2285
2286         return FALSE;
2287 }
2288
2289 RendererFuncs *renderer_tiles_new(PixbufRenderer *pr)
2290 {
2291         auto rt = g_new0(RendererTiles, 1);
2292
2293         rt->pr = pr;
2294
2295         rt->f.area_changed = renderer_area_changed;
2296         rt->f.update_pixbuf = renderer_update_pixbuf;
2297         rt->f.free = renderer_free;
2298         rt->f.update_zoom = renderer_update_zoom;
2299         rt->f.invalidate_region = renderer_invalidate_region;
2300         rt->f.scroll = rt_scroll;
2301         rt->f.update_viewport = renderer_update_viewport;
2302
2303
2304         rt->f.overlay_add = renderer_tiles_overlay_add;
2305         rt->f.overlay_set = renderer_tiles_overlay_set;
2306         rt->f.overlay_get = renderer_tiles_overlay_get;
2307
2308         rt->f.stereo_set = renderer_stereo_set;
2309
2310         rt->tile_width = options->image.tile_size;
2311         rt->tile_height = options->image.tile_size;
2312
2313         rt->tiles = nullptr;
2314         rt->tile_cache_size = 0;
2315
2316         rt->tile_cache_max = PR_CACHE_SIZE_DEFAULT;
2317
2318         rt->draw_idle_id = 0;
2319
2320         rt->stereo_mode = 0;
2321         rt->stereo_off_x = 0;
2322         rt->stereo_off_y = 0;
2323
2324         rt->hidpi_scale = gtk_widget_get_scale_factor(GTK_WIDGET(rt->pr));
2325
2326         g_signal_connect(G_OBJECT(pr), "hierarchy-changed",
2327                          G_CALLBACK(rt_hierarchy_changed_cb), rt);
2328
2329         g_signal_connect(G_OBJECT(pr), "draw",
2330                          G_CALLBACK(rt_draw_cb), rt);
2331         g_signal_connect(G_OBJECT(pr), "realize", G_CALLBACK(rt_realize_cb), rt);
2332         g_signal_connect(G_OBJECT(pr), "size-allocate", G_CALLBACK(rt_size_allocate_cb), rt);
2333
2334         return reinterpret_cast<RendererFuncs *>(rt);
2335 }
2336
2337
2338 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */