src/renderer-tiles.c

   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 <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <math.h>
  26
  27 #include "main.h"
  28 #include "pixbuf-renderer.h"
  29 #include "renderer-tiles.h"
  30
  31 #include "intl.h"
  32 #include "layout.h"
  33
  34 #include <gtk/gtk.h>
  35
  36
  37 /* comment this out if not using this from within Geeqie
  38  * defining GQ_BUILD does these things:
  39  *   - Sets the shift-click scroller pixbuf to a nice icon instead of a black box
  40  */
  41 #define GQ_BUILD 1
  42
  43 #ifdef GQ_BUILD
  44 #include "main.h"
  45 #include "pixbuf_util.h"
  46 #include "exif.h"
  47 #else
  48 typedef enum {
  49         EXIF_ORIENTATION_UNKNOWN        = 0,
  50         EXIF_ORIENTATION_TOP_LEFT       = 1,
  51         EXIF_ORIENTATION_TOP_RIGHT      = 2,
  52         EXIF_ORIENTATION_BOTTOM_RIGHT   = 3,
  53         EXIF_ORIENTATION_BOTTOM_LEFT    = 4,
  54         EXIF_ORIENTATION_LEFT_TOP       = 5,
  55         EXIF_ORIENTATION_RIGHT_TOP      = 6,
  56         EXIF_ORIENTATION_RIGHT_BOTTOM   = 7,
  57         EXIF_ORIENTATION_LEFT_BOTTOM    = 8
  58 } ExifOrientationType;
  59 #endif
  60
  61
  62 /* size to use when breaking up image pane for rendering */
  63 #define PR_TILE_SIZE 128
  64
  65 typedef struct _ImageTile ImageTile;
  66 typedef struct _QueueData QueueData;
  67
  68 struct _ImageTile
  69 {
  70         cairo_surface_t *surface;       /* off screen buffer */
  71         GdkPixbuf *pixbuf;      /* pixbuf area for zooming */
  72         gint x;                 /* x offset into image */
  73         gint y;                 /* y offset into image */
  74         gint w;                 /* width that is visible (may be less if at edge of image) */
  75         gint h;                 /* height '' */
  76
  77         gboolean blank;
  78
  79 /* render_todo: (explanation)
  80         NONE    do nothing
  81         AREA    render area of tile, usually only used when loading an image
  82                 note: will jump to an ALL if render_done is not ALL.
  83         ALL     render entire tile, if never done before w/ ALL, for expose events *only*
  84 */
  85
  86         ImageRenderType render_todo;    /* what to do (see above) */
  87         ImageRenderType render_done;    /* highest that has been done before on tile */
  88
  89         QueueData *qd;
  90         QueueData *qd2;
  91
  92         guint size;             /* est. memory used by pixmap and pixbuf */
  93 };
  94
  95 struct _QueueData
  96 {
  97         ImageTile *it;
  98         gint x;
  99         gint y;
 100         gint w;
 101         gint h;
 102         gboolean new_data;
 103 };
 104
 105 typedef struct _OverlayData OverlayData;
 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 typedef struct _RendererTiles RendererTiles;
 120
 121 struct _RendererTiles
 122 {
 123         RendererFuncs f;
 124         PixbufRenderer *pr;
 125
 126         gint tile_cache_max;            /* max MiB to use for offscreen buffer */
 127
 128         gint tile_width;
 129         gint tile_height;
 130         gint tile_cols;         /* count of tile columns */
 131         GList *tiles;           /* list of buffer tiles */
 132         gint tile_cache_size;   /* allocated size of pixmaps/pixbufs */
 133         GList *draw_queue;      /* list of areas to redraw */
 134         GList *draw_queue_2pass;/* list when 2 pass is enabled */
 135
 136         GList *overlay_list;
 137         cairo_surface_t *overlay_buffer;
 138         cairo_surface_t *surface;
 139
 140         guint draw_idle_id; /* event source id */
 141
 142         GdkPixbuf *spare_tile;
 143
 144         gint stereo_mode;
 145         gint stereo_off_x;
 146         gint stereo_off_y;
 147
 148         gint x_scroll;  /* allow local adjustment and mirroring */
 149         gint y_scroll;
 150
 151         gint hidpi_scale;
 152 };
 153
 154
 155
 156 static void rt_border_draw(RendererTiles *rt, gint x, gint y, gint w, gint h);
 157 static void rt_overlay_draw(RendererTiles *rt, gint x, gint y, gint w, gint h, ImageTile *it);
 158
 159
 160 static void rt_tile_free_all(RendererTiles *rt);
 161 static void rt_tile_invalidate_region(RendererTiles *rt, gint x, gint y, gint w, gint h);
 162 static gboolean rt_tile_is_visible(RendererTiles *rt, ImageTile *it);
 163 static void rt_queue_clear(RendererTiles *rt);
 164 static void rt_queue_merge(QueueData *parent, QueueData *qd);
 165 static void rt_queue(RendererTiles *rt, gint x, gint y, gint w, gint h,
 166                      gint clamp, ImageRenderType render, gboolean new_data, gboolean only_existing);
 167
 168 static void rt_hierarchy_changed_cb(GtkWidget *widget, GtkWidget *previous_toplevel, gpointer data);
 169 static gint rt_queue_draw_idle_cb(gpointer data);
 170
 171 #define GET_RIGHT_PIXBUF_OFFSET(rt) \
 172         (( (rt->stereo_mode & PR_STEREO_RIGHT) && !(rt->stereo_mode & PR_STEREO_SWAP)) || \
 173          (!(rt->stereo_mode & PR_STEREO_RIGHT) &&  (rt->stereo_mode & PR_STEREO_SWAP)) ?  \
 174           rt->pr->stereo_pixbuf_offset_right : rt->pr->stereo_pixbuf_offset_left )
 175
 176 #define GET_LEFT_PIXBUF_OFFSET(rt) \
 177         ((!(rt->stereo_mode & PR_STEREO_RIGHT) && !(rt->stereo_mode & PR_STEREO_SWAP)) || \
 178          ( (rt->stereo_mode & PR_STEREO_RIGHT) &&  (rt->stereo_mode & PR_STEREO_SWAP)) ?  \
 179           rt->pr->stereo_pixbuf_offset_right : rt->pr->stereo_pixbuf_offset_left )
 180
 181
 182 static void rt_sync_scroll(RendererTiles *rt)
 183 {
 184         PixbufRenderer *pr = rt->pr;
 185
 186         rt->x_scroll = (rt->stereo_mode & PR_STEREO_MIRROR) ?
 187                        pr->width - pr->vis_width - pr->x_scroll
 188                        : pr->x_scroll;
 189
 190         rt->y_scroll = (rt->stereo_mode & PR_STEREO_FLIP) ?
 191                        pr->height - pr->vis_height - pr->y_scroll
 192                        : pr->y_scroll;
 193 }
 194
 195 /*
 196  *-------------------------------------------------------------------
 197  * borders
 198  *-------------------------------------------------------------------
 199  */
 200
 201 static void rt_border_draw(RendererTiles *rt, gint x, gint y, gint w, gint h)
 202 {
 203         PixbufRenderer *pr = rt->pr;
 204         GtkWidget *box;
 205         GdkWindow *window;
 206         gint rx, ry, rw, 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 #if GTK_CHECK_VERSION(3,0,0)
 215         cr = cairo_create(rt->surface);
 216 #else
 217         cr = gdk_cairo_create(window);
 218 #endif
 219
 220         if (!pr->pixbuf && !pr->source_tiles_enabled)
 221                 {
 222                 if (pr_clip_region(x, y, w, h,
 223                                    0, 0,
 224                                    pr->viewport_width, pr->viewport_height,
 225                                    &rx, &ry, &rw, &rh))
 226                         {
 227                         cairo_set_source_rgb(cr, (double)pr->color.red/65535, (double)pr->color.green/65535, (double)pr->color.blue/65535);
 228                         cairo_rectangle(cr, rx + rt->stereo_off_x, ry + rt->stereo_off_y, rw, rh);
 229                         cairo_fill(cr);
 230                         rt_overlay_draw(rt, rx, ry, rw, rh, NULL);
 231                         }
 232                 cairo_destroy(cr);
 233                 return;
 234                 }
 235
 236         if (pr->vis_width < pr->viewport_width)
 237                 {
 238                 if (pr->x_offset > 0 &&
 239                     pr_clip_region(x, y, w, h,
 240                                    0, 0,
 241                                    pr->x_offset, pr->viewport_height,
 242                                    &rx, &ry, &rw, &rh))
 243                         {
 244                         cairo_set_source_rgb(cr, (double)pr->color.red/65535, (double)pr->color.green/65535, (double)pr->color.blue/65535);
 245                         cairo_rectangle(cr, rx + rt->stereo_off_x, ry + rt->stereo_off_y, rw, rh);
 246                         cairo_fill(cr);
 247                         rt_overlay_draw(rt, rx, ry, rw, rh, NULL);
 248                         }
 249                 if (pr->viewport_width - pr->vis_width - pr->x_offset > 0 &&
 250                     pr_clip_region(x, y, w, h,
 251                                    pr->x_offset + pr->vis_width, 0,
 252                                    pr->viewport_width - pr->vis_width - pr->x_offset, pr->viewport_height,
 253                                    &rx, &ry, &rw, &rh))
 254                         {
 255                         cairo_set_source_rgb(cr, (double)pr->color.red/65535, (double)pr->color.green/65535, (double)pr->color.blue/65535);
 256                         cairo_rectangle(cr, rx + rt->stereo_off_x, ry + rt->stereo_off_y, rw, rh);
 257                         cairo_fill(cr);
 258                         rt_overlay_draw(rt, rx, ry, rw, rh, NULL);
 259                         }
 260                 }
 261         if (pr->vis_height < pr->viewport_height)
 262                 {
 263                 if (pr->y_offset > 0 &&
 264                     pr_clip_region(x, y, w, h,
 265                                    pr->x_offset, 0,
 266                                    pr->vis_width, pr->y_offset,
 267                                    &rx, &ry, &rw, &rh))
 268                         {
 269                         cairo_set_source_rgb(cr, (double)pr->color.red/65535, (double)pr->color.green/65535, (double)pr->color.blue/65535);
 270                         cairo_rectangle(cr, rx + rt->stereo_off_x, ry + rt->stereo_off_y, rw, rh);
 271                         cairo_fill(cr);
 272                         rt_overlay_draw(rt, rx, ry, rw, rh, NULL);
 273                         }
 274                 if (pr->viewport_height - pr->vis_height - pr->y_offset > 0 &&
 275                     pr_clip_region(x, y, w, h,
 276                                    pr->x_offset, pr->y_offset + pr->vis_height,
 277                                    pr->vis_width, pr->viewport_height - pr->vis_height - pr->y_offset,
 278                                    &rx, &ry, &rw, &rh))
 279                         {
 280                         cairo_set_source_rgb(cr, (double)pr->color.red/65535, (double)pr->color.green/65535, (double)pr->color.blue/65535);
 281                         cairo_rectangle(cr, rx + rt->stereo_off_x, ry + rt->stereo_off_y, rw, rh);
 282                         cairo_fill(cr);
 283                         rt_overlay_draw(rt, rx, ry, rw, rh, NULL);
 284                         }
 285                 }
 286         cairo_destroy(cr);
 287 }
 288
 289 static void rt_border_clear(RendererTiles *rt)
 290 {
 291         PixbufRenderer *pr = rt->pr;
 292         rt_border_draw(rt, 0, 0, pr->viewport_width, pr->viewport_height);
 293 }
 294
 295
 296 /*
 297  *-------------------------------------------------------------------
 298  * display tiles
 299  *-------------------------------------------------------------------
 300  */
 301
 302 static ImageTile *rt_tile_new(gint x, gint y, gint width, gint height)
 303 {
 304         ImageTile *it;
 305
 306         it = g_new0(ImageTile, 1);
 307
 308         it->x = x;
 309         it->y = y;
 310         it->w = width;
 311         it->h = height;
 312
 313         it->render_done = TILE_RENDER_NONE;
 314
 315         return it;
 316 }
 317
 318 static void rt_tile_free(ImageTile *it)
 319 {
 320         if (!it) return;
 321
 322         if (it->pixbuf) g_object_unref(it->pixbuf);
 323         if (it->surface) cairo_surface_destroy(it->surface);
 324
 325         g_free(it);
 326 }
 327
 328 static void rt_tile_free_all(RendererTiles *rt)
 329 {
 330         GList *work;
 331
 332         work = rt->tiles;
 333         while (work)
 334                 {
 335                 ImageTile *it;
 336
 337                 it = work->data;
 338                 work = work->next;
 339
 340                 rt_tile_free(it);
 341                 }
 342
 343         g_list_free(rt->tiles);
 344         rt->tiles = NULL;
 345         rt->tile_cache_size = 0;
 346 }
 347
 348 static ImageTile *rt_tile_add(RendererTiles *rt, gint x, gint y)
 349 {
 350         PixbufRenderer *pr = rt->pr;
 351         ImageTile *it;
 352
 353         it = rt_tile_new(x, y, rt->tile_width, rt->tile_height);
 354
 355         if (it->x + it->w > pr->width) it->w = pr->width - it->x;
 356         if (it->y + it->h > pr->height) it->h = pr->height - it->y;
 357
 358         rt->tiles = g_list_prepend(rt->tiles, it);
 359         rt->tile_cache_size += it->size;
 360
 361         return it;
 362 }
 363
 364 static void rt_tile_remove(RendererTiles *rt, ImageTile *it)
 365 {
 366         if (it->qd)
 367                 {
 368                 QueueData *qd = it->qd;
 369
 370                 it->qd = NULL;
 371                 rt->draw_queue = g_list_remove(rt->draw_queue, qd);
 372                 g_free(qd);
 373                 }
 374
 375         if (it->qd2)
 376                 {
 377                 QueueData *qd = it->qd2;
 378
 379                 it->qd2 = NULL;
 380                 rt->draw_queue_2pass = g_list_remove(rt->draw_queue_2pass, qd);
 381                 g_free(qd);
 382                 }
 383
 384         rt->tiles = g_list_remove(rt->tiles, it);
 385         rt->tile_cache_size -= it->size;
 386
 387         rt_tile_free(it);
 388 }
 389
 390 static void rt_tile_free_space(RendererTiles *rt, guint space, ImageTile *it)
 391 {
 392         PixbufRenderer *pr = rt->pr;
 393         GList *work;
 394         guint tile_max;
 395
 396         work = g_list_last(rt->tiles);
 397
 398         if (pr->source_tiles_enabled && pr->scale < 1.0)
 399                 {
 400                 gint tiles;
 401
 402                 tiles = (pr->vis_width / rt->tile_width + 1) * (pr->vis_height / rt->tile_height + 1);
 403                 tile_max = MAX(tiles * rt->tile_width * rt->tile_height * 3,
 404                                (gint)((gdouble)rt->tile_cache_max * 1048576.0 * pr->scale));
 405                 }
 406         else
 407                 {
 408                 tile_max = rt->tile_cache_max * 1048576;
 409                 }
 410
 411         while (work && rt->tile_cache_size + space > tile_max)
 412                 {
 413                 ImageTile *needle;
 414
 415                 needle = work->data;
 416                 work = work->prev;
 417                 if (needle != it &&
 418                     ((!needle->qd && !needle->qd2) || !rt_tile_is_visible(rt, needle))) rt_tile_remove(rt, needle);
 419                 }
 420 }
 421
 422 static void rt_tile_invalidate_all(RendererTiles *rt)
 423 {
 424         PixbufRenderer *pr = rt->pr;
 425         GList *work;
 426
 427         work = rt->tiles;
 428         while (work)
 429                 {
 430                 ImageTile *it;
 431
 432                 it = work->data;
 433                 work = work->next;
 434
 435                 it->render_done = TILE_RENDER_NONE;
 436                 it->render_todo = TILE_RENDER_ALL;
 437                 it->blank = FALSE;
 438
 439                 it->w = MIN(rt->tile_width, pr->width - it->x);
 440                 it->h = MIN(rt->tile_height, pr->height - it->y);
 441                 }
 442 }
 443
 444 static void rt_tile_invalidate_region(RendererTiles *rt, gint x, gint y, gint w, gint h)
 445 {
 446         gint x1, x2;
 447         gint y1, y2;
 448         GList *work;
 449
 450         x1 = ROUND_DOWN(x, rt->tile_width);
 451         x2 = ROUND_UP(x + w, rt->tile_width);
 452
 453         y1 = ROUND_DOWN(y, rt->tile_height);
 454         y2 = ROUND_UP(y + h, rt->tile_height);
 455
 456         work = rt->tiles;
 457         while (work)
 458                 {
 459                 ImageTile *it;
 460
 461                 it = work->data;
 462                 work = work->next;
 463
 464                 if (it->x < x2 && it->x + it->w > x1 &&
 465                     it->y < y2 && it->y + it->h > y1)
 466                         {
 467                         it->render_done = TILE_RENDER_NONE;
 468                         it->render_todo = TILE_RENDER_ALL;
 469                         }
 470                 }
 471 }
 472
 473 static ImageTile *rt_tile_get(RendererTiles *rt, gint x, gint y, gboolean only_existing)
 474 {
 475         GList *work;
 476
 477         work = rt->tiles;
 478         while (work)
 479                 {
 480                 ImageTile *it;
 481
 482                 it = work->data;
 483                 if (it->x == x && it->y == y)
 484                         {
 485                         rt->tiles = g_list_delete_link(rt->tiles, work);
 486                         rt->tiles = g_list_prepend(rt->tiles, it);
 487                         return it;
 488                         }
 489
 490                 work = work->next;
 491                 }
 492
 493         if (only_existing) return NULL;
 494
 495         return rt_tile_add(rt, x, y);
 496 }
 497
 498 static gint pixmap_calc_size(cairo_surface_t *surface)
 499 {
 500 //      gint w, h, d;
 501
 502 //      d = gdk_drawable_get_depth(pixmap);
 503 //      gdk_drawable_get_size(pixmap, &w, &h);
 504         return PR_TILE_SIZE * PR_TILE_SIZE * 4 / 8;
 505 }
 506
 507 static void rt_hidpi_aware_draw(
 508         RendererTiles *rt,
 509         cairo_t *cr,
 510         GdkPixbuf *pixbuf,
 511         double x,
 512         double y)
 513 {
 514 #if GTK_CHECK_VERSION(3, 10, 0)
 515         cairo_surface_t *surface;
 516         surface = gdk_cairo_surface_create_from_pixbuf(pixbuf, rt->hidpi_scale, NULL);
 517         cairo_set_source_surface(cr, surface, x, y);
 518         cairo_fill(cr);
 519         cairo_surface_destroy(surface);
 520 #else
 521         gdk_cairo_set_source_pixbuf(cr, pixbuf, x, y);
 522         cairo_fill(cr);
 523 #endif
 524 }
 525
 526 static void rt_tile_prepare(RendererTiles *rt, ImageTile *it)
 527 {
 528         PixbufRenderer *pr = rt->pr;
 529         if (!it->surface)
 530                 {
 531                 cairo_surface_t *surface;
 532                 guint size;
 533
 534                 surface = gdk_window_create_similar_surface(gtk_widget_get_window((GtkWidget *)pr),
 535                                                             CAIRO_CONTENT_COLOR,
 536                                                             rt->tile_width, rt->tile_height);
 537
 538                 size = pixmap_calc_size(surface) * rt->hidpi_scale * rt->hidpi_scale;
 539                 rt_tile_free_space(rt, size, it);
 540
 541                 it->surface = surface;
 542                 it->size += size;
 543                 rt->tile_cache_size += size;
 544                 }
 545
 546         if (!it->pixbuf)
 547                 {
 548                 GdkPixbuf *pixbuf;
 549                 guint size;
 550                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, rt->hidpi_scale * rt->tile_width, rt->hidpi_scale * rt->tile_height);
 551
 552                 size = gdk_pixbuf_get_rowstride(pixbuf) * rt->tile_height * rt->hidpi_scale;
 553                 rt_tile_free_space(rt, size, it);
 554
 555                 it->pixbuf = pixbuf;
 556                 it->size += size;
 557                 rt->tile_cache_size += size;
 558                 }
 559 }
 560
 561 /*
 562  *-------------------------------------------------------------------
 563  * overlays
 564  *-------------------------------------------------------------------
 565  */
 566
 567 static void rt_overlay_get_position(RendererTiles *rt, OverlayData *od,
 568                                     gint *x, gint *y, gint *w, gint *h)
 569 {
 570         PixbufRenderer *pr = rt->pr;
 571         gint px, py, pw, ph;
 572
 573         pw = gdk_pixbuf_get_width(od->pixbuf);
 574         ph = gdk_pixbuf_get_height(od->pixbuf);
 575         px = od->x;
 576         py = od->y;
 577
 578         if (od->flags & OVL_RELATIVE)
 579                 {
 580                 if (px < 0) px = pr->viewport_width - pw + px;
 581                 if (py < 0) py = pr->viewport_height - ph + py;
 582                 }
 583
 584         if (x) *x = px;
 585         if (y) *y = py;
 586         if (w) *w = pw;
 587         if (h) *h = ph;
 588 }
 589
 590 static void rt_overlay_init_window(RendererTiles *rt, OverlayData *od)
 591 {
 592         PixbufRenderer *pr = rt->pr;
 593         gint px, py, pw, ph;
 594         GdkWindowAttr attributes;
 595         gint attributes_mask;
 596
 597         rt_overlay_get_position(rt, od, &px, &py, &pw, &ph);
 598
 599         attributes.window_type = GDK_WINDOW_CHILD;
 600         attributes.wclass = GDK_INPUT_OUTPUT;
 601         attributes.width = pw;
 602         attributes.height = ph;
 603         attributes.event_mask = GDK_EXPOSURE_MASK;
 604         attributes_mask = 0;
 605
 606         od->window = gdk_window_new(gtk_widget_get_window(GTK_WIDGET(pr)), &attributes, attributes_mask);
 607         gdk_window_set_user_data(od->window, pr);
 608         gdk_window_move(od->window, px + rt->stereo_off_x, py + rt->stereo_off_y);
 609 #if !GTK_CHECK_VERSION(3,0,0)
 610         gdk_window_show(od->window);
 611 #endif
 612 }
 613
 614 static void rt_overlay_draw(RendererTiles *rt, gint x, gint y, gint w, gint h,
 615                             ImageTile *it)
 616 {
 617         PixbufRenderer *pr = rt->pr;
 618         GList *work;
 619
 620         work = rt->overlay_list;
 621         while (work)
 622                 {
 623                 OverlayData *od;
 624                 gint px, py, pw, ph;
 625                 gint rx, ry, rw, rh;
 626
 627                 od = work->data;
 628                 work = work->next;
 629
 630                 if (!od->window) rt_overlay_init_window(rt, od);
 631
 632                 rt_overlay_get_position(rt, od, &px, &py, &pw, &ph);
 633                 if (pr_clip_region(x, y, w, h, px, py, pw, ph, &rx, &ry, &rw, &rh))
 634                         {
 635                         if (!rt->overlay_buffer)
 636                                 {
 637                                 rt->overlay_buffer = gdk_window_create_similar_surface(gtk_widget_get_window((GtkWidget *)pr),
 638                                                             CAIRO_CONTENT_COLOR,
 639                                                             rt->tile_width, rt->tile_height);
 640                                 }
 641
 642                         if (it)
 643                                 {
 644                                 cairo_t *cr;
 645
 646                                 cr = cairo_create(rt->overlay_buffer);
 647                                 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);
 648                                 cairo_rectangle(cr, 0, 0, rw, rh);
 649                                 cairo_fill_preserve(cr);
 650
 651                                 gdk_cairo_set_source_pixbuf(cr, od->pixbuf, px - rx, py - ry);
 652                                 cairo_fill(cr);
 653                                 cairo_destroy (cr);
 654
 655                                 cr = gdk_cairo_create(od->window);
 656                                 cairo_set_source_surface(cr, rt->overlay_buffer, rx - px, ry - py);
 657                                 cairo_rectangle (cr, rx - px, ry - py, rw, rh);
 658                                 cairo_fill (cr);
 659                                 cairo_destroy (cr);
 660                                 }
 661                         else
 662                                 {
 663                                 /* no ImageTile means region may be larger than our scratch buffer */
 664                                 gint sx, sy;
 665
 666                                 for (sx = rx; sx < rx + rw; sx += rt->tile_width)
 667                                     for (sy = ry; sy < ry + rh; sy += rt->tile_height)
 668                                         {
 669                                         gint sw, sh;
 670                                         cairo_t *cr;
 671
 672                                         sw = MIN(rx + rw - sx, rt->tile_width);
 673                                         sh = MIN(ry + rh - sy, rt->tile_height);
 674
 675                                         cr = cairo_create(rt->overlay_buffer);
 676                                         cairo_set_source_rgb(cr, 0, 0, 0);
 677                                         cairo_rectangle(cr, 0, 0, sw, sh);
 678                                         cairo_fill_preserve(cr);
 679
 680                                         gdk_cairo_set_source_pixbuf(cr, od->pixbuf, px - sx, py - sy);
 681                                         cairo_fill (cr);
 682                                         cairo_destroy (cr);
 683
 684                                         cr = gdk_cairo_create(od->window);
 685                                         cairo_set_source_surface(cr, rt->overlay_buffer, sx - px, sy - py);
 686                                         cairo_rectangle (cr, sx - px, sy - py, sw, sh);
 687                                         cairo_fill(cr);
 688                                         cairo_destroy(cr);
 689                                         }
 690                                 }
 691                         }
 692                 }
 693 }
 694
 695 static void rt_overlay_queue_draw(RendererTiles *rt, OverlayData *od, gint x1, gint y1, gint x2, gint y2)
 696 {
 697         PixbufRenderer *pr = rt->pr;
 698         gint x, y, w, h;
 699
 700         rt_overlay_get_position(rt, od, &x, &y, &w, &h);
 701
 702         /* add borders */
 703         x -= x1;
 704         y -= y1;
 705         w += x1 + x2;
 706         h += y1 + y2;
 707
 708         rt_queue(rt, rt->x_scroll - pr->x_offset + x,
 709                  rt->y_scroll - pr->y_offset + y,
 710                  w, h,
 711                  FALSE, TILE_RENDER_ALL, FALSE, FALSE);
 712
 713         rt_border_draw(rt, x, y, w, h);
 714 }
 715
 716 static void rt_overlay_queue_all(RendererTiles *rt, gint x1, gint y1, gint x2, gint y2)
 717 {
 718         GList *work;
 719
 720         work = rt->overlay_list;
 721         while (work)
 722                 {
 723                 OverlayData *od = work->data;
 724                 work = work->next;
 725
 726                 rt_overlay_queue_draw(rt, od, x1, y1, x2, y2);
 727                 }
 728 }
 729
 730 static void rt_overlay_update_sizes(RendererTiles *rt)
 731 {
 732         GList *work;
 733
 734         work = rt->overlay_list;
 735         while (work)
 736                 {
 737                 OverlayData *od = work->data;
 738                 work = work->next;
 739
 740                 if (!od->window) rt_overlay_init_window(rt, od);
 741
 742                 if (od->flags & OVL_RELATIVE)
 743                         {
 744                         gint x, y, w, h;
 745
 746                         rt_overlay_get_position(rt, od, &x, &y, &w, &h);
 747                         gdk_window_move_resize(od->window, x + rt->stereo_off_x, y + rt->stereo_off_y, w, h);
 748                         }
 749                 }
 750 }
 751
 752 static OverlayData *rt_overlay_find(RendererTiles *rt, gint id)
 753 {
 754         GList *work;
 755
 756         work = rt->overlay_list;
 757         while (work)
 758                 {
 759                 OverlayData *od = work->data;
 760                 work = work->next;
 761
 762                 if (od->id == id) return od;
 763                 }
 764
 765         return NULL;
 766 }
 767
 768
 769 gint renderer_tiles_overlay_add(void *renderer, GdkPixbuf *pixbuf, gint x, gint y,
 770                                  OverlayRendererFlags flags)
 771 {
 772         RendererTiles *rt = (RendererTiles *) renderer;
 773         PixbufRenderer *pr = rt->pr;
 774         OverlayData *od;
 775         gint id;
 776
 777         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), -1);
 778         g_return_val_if_fail(pixbuf != NULL, -1);
 779
 780         id = 1;
 781         while (rt_overlay_find(rt, id)) id++;
 782
 783         od = g_new0(OverlayData, 1);
 784         od->id = id;
 785         od->pixbuf = pixbuf;
 786         g_object_ref(G_OBJECT(od->pixbuf));
 787         od->x = x;
 788         od->y = y;
 789         od->flags = flags;
 790
 791         rt_overlay_init_window(rt, od);
 792
 793         rt->overlay_list = g_list_append(rt->overlay_list, od);
 794
 795 #if GTK_CHECK_VERSION(3,0,0)
 796         gtk_widget_queue_draw(GTK_WIDGET(rt->pr));
 797 #else
 798         rt_overlay_queue_draw(rt, od, 0, 0, 0, 0);
 799 #endif
 800
 801         return od->id;
 802 }
 803
 804 static void rt_overlay_free(RendererTiles *rt, OverlayData *od)
 805 {
 806         rt->overlay_list = g_list_remove(rt->overlay_list, od);
 807
 808         if (od->pixbuf) g_object_unref(G_OBJECT(od->pixbuf));
 809         if (od->window) gdk_window_destroy(od->window);
 810         g_free(od);
 811
 812         if (!rt->overlay_list && rt->overlay_buffer)
 813                 {
 814                 cairo_surface_destroy(rt->overlay_buffer);
 815                 rt->overlay_buffer = NULL;
 816                 }
 817 }
 818
 819 static void rt_overlay_list_clear(RendererTiles *rt)
 820 {
 821         while (rt->overlay_list)
 822                 {
 823                 OverlayData *od;
 824
 825                 od = rt->overlay_list->data;
 826                 rt_overlay_free(rt, od);
 827                 }
 828 }
 829
 830 static void rt_overlay_list_reset_window(RendererTiles *rt)
 831 {
 832         GList *work;
 833
 834         if (rt->overlay_buffer) cairo_surface_destroy(rt->overlay_buffer);
 835         rt->overlay_buffer = NULL;
 836
 837         work = rt->overlay_list;
 838         while (work)
 839                 {
 840                 OverlayData *od = work->data;
 841                 work = work->next;
 842                 if (od->window) gdk_window_destroy(od->window);
 843                 od->window = NULL;
 844                 }
 845 }
 846
 847 #if GTK_CHECK_VERSION(3,0,0)
 848 void renderer_tiles_overlay_set(void *renderer, gint id, GdkPixbuf *pixbuf, gint x, gint y)
 849 {
 850         RendererTiles *rc = (RendererTiles *)renderer;
 851         PixbufRenderer *pr = rc->pr;
 852         OverlayData *od;
 853
 854         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
 855
 856         od = rt_overlay_find(rc, id);
 857         if (!od) return;
 858
 859         if (pixbuf)
 860                 {
 861                 g_object_ref(G_OBJECT(pixbuf));
 862                 g_object_unref(G_OBJECT(od->pixbuf));
 863                 od->pixbuf = pixbuf;
 864                 }
 865         else
 866                 {
 867                 rt_overlay_free(rc, od);
 868                 }
 869 }
 870 #else
 871 void renderer_tiles_overlay_set(void *renderer, gint id, GdkPixbuf *pixbuf, gint x, gint y)
 872 {
 873         RendererTiles *rt = (RendererTiles *) renderer;
 874         PixbufRenderer *pr = rt->pr;
 875         OverlayData *od;
 876
 877         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
 878
 879         od = rt_overlay_find(rt, id);
 880         if (!od) return;
 881
 882         if (pixbuf)
 883                 {
 884                 gint px, py, pw, ph;
 885
 886                 g_object_ref(G_OBJECT(pixbuf));
 887                 g_object_unref(G_OBJECT(od->pixbuf));
 888                 od->pixbuf = pixbuf;
 889
 890                 od->x = x;
 891                 od->y = y;
 892
 893                 if (!od->window) rt_overlay_init_window(rt, od);
 894
 895                 rt_overlay_queue_draw(rt, od, 0, 0, 0, 0);
 896                 rt_overlay_get_position(rt, od, &px, &py, &pw, &ph);
 897                 gdk_window_move_resize(od->window, px + rt->stereo_off_x, py + rt->stereo_off_y, pw, ph);
 898                 }
 899         else
 900                 {
 901                 rt_overlay_queue_draw(rt, od, 0, 0, 0, 0);
 902                 rt_overlay_free(rt, od);
 903                 }
 904 }
 905 #endif
 906
 907 gboolean renderer_tiles_overlay_get(void *renderer, gint id, GdkPixbuf **pixbuf, gint *x, gint *y)
 908 {
 909         RendererTiles *rt = (RendererTiles *) renderer;
 910         PixbufRenderer *pr = rt->pr;
 911         OverlayData *od;
 912
 913         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
 914
 915         od = rt_overlay_find(rt, id);
 916         if (!od) return FALSE;
 917
 918         if (pixbuf) *pixbuf = od->pixbuf;
 919         if (x) *x = od->x;
 920         if (y) *y = od->y;
 921
 922         return TRUE;
 923 }
 924
 925 static void rt_hierarchy_changed_cb(GtkWidget *widget, GtkWidget *previous_toplevel, gpointer data)
 926 {
 927         RendererTiles *rt = data;
 928         rt_overlay_list_reset_window(rt);
 929 }
 930
 931 /*
 932  *-------------------------------------------------------------------
 933  * drawing
 934  *-------------------------------------------------------------------
 935  */
 936
 937 static GdkPixbuf *rt_get_spare_tile(RendererTiles *rt)
 938 {
 939         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);
 940         return rt->spare_tile;
 941 }
 942
 943 #define COLOR_BYTES 3   /* rgb */
 944
 945 static void rt_tile_rotate_90_clockwise(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
 946 {
 947         GdkPixbuf *src = *tile;
 948         GdkPixbuf *dest;
 949         gint srs, drs;
 950         guchar *s_pix, *d_pix;
 951         guchar *sp, *dp;
 952         guchar *ip, *spi, *dpi;
 953         gint i, j;
 954         gint tw = rt->tile_width * rt->hidpi_scale;
 955
 956         srs = gdk_pixbuf_get_rowstride(src);
 957         s_pix = gdk_pixbuf_get_pixels(src);
 958         spi = s_pix + (x * COLOR_BYTES);
 959
 960         dest = rt_get_spare_tile(rt);
 961         drs = gdk_pixbuf_get_rowstride(dest);
 962         d_pix = gdk_pixbuf_get_pixels(dest);
 963         dpi = d_pix + (tw - 1) * COLOR_BYTES;
 964
 965         for (i = y; i < y + h; i++)
 966                 {
 967                 sp = spi + (i * srs);
 968                 ip = dpi - (i * COLOR_BYTES);
 969                 for (j = x; j < x + w; j++)
 970                         {
 971                         dp = ip + (j * drs);
 972                         memcpy(dp, sp, COLOR_BYTES);
 973                         sp += COLOR_BYTES;
 974                         }
 975                 }
 976
 977         rt->spare_tile = src;
 978         *tile = dest;
 979 }
 980
 981 static void rt_tile_rotate_90_counter_clockwise(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
 982 {
 983         GdkPixbuf *src = *tile;
 984         GdkPixbuf *dest;
 985         gint srs, drs;
 986         guchar *s_pix, *d_pix;
 987         guchar *sp, *dp;
 988         guchar *ip, *spi, *dpi;
 989         gint i, j;
 990         gint th = rt->tile_height * rt->hidpi_scale;
 991
 992         srs = gdk_pixbuf_get_rowstride(src);
 993         s_pix = gdk_pixbuf_get_pixels(src);
 994         spi = s_pix + (x * COLOR_BYTES);
 995
 996         dest = rt_get_spare_tile(rt);
 997         drs = gdk_pixbuf_get_rowstride(dest);
 998         d_pix = gdk_pixbuf_get_pixels(dest);
 999         dpi = d_pix + (th - 1) * drs;
1000
1001         for (i = y; i < y + h; i++)
1002                 {
1003                 sp = spi + (i * srs);
1004                 ip = dpi + (i * COLOR_BYTES);
1005                 for (j = x; j < x + w; j++)
1006                         {
1007                         dp = ip - (j * drs);
1008                         memcpy(dp, sp, COLOR_BYTES);
1009                         sp += COLOR_BYTES;
1010                         }
1011                 }
1012
1013         rt->spare_tile = src;
1014         *tile = dest;
1015 }
1016
1017 static void rt_tile_mirror_only(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
1018 {
1019         GdkPixbuf *src = *tile;
1020         GdkPixbuf *dest;
1021         gint srs, drs;
1022         guchar *s_pix, *d_pix;
1023         guchar *sp, *dp;
1024         guchar *spi, *dpi;
1025         gint i, j;
1026
1027         gint tw = rt->tile_width * rt->hidpi_scale;
1028
1029         srs = gdk_pixbuf_get_rowstride(src);
1030         s_pix = gdk_pixbuf_get_pixels(src);
1031         spi = s_pix + (x * COLOR_BYTES);
1032
1033         dest = rt_get_spare_tile(rt);
1034         drs = gdk_pixbuf_get_rowstride(dest);
1035         d_pix = gdk_pixbuf_get_pixels(dest);
1036         dpi =  d_pix + (tw - x - 1) * COLOR_BYTES;
1037
1038         for (i = y; i < y + h; i++)
1039                 {
1040                 sp = spi + (i * srs);
1041                 dp = dpi + (i * drs);
1042                 for (j = 0; j < w; j++)
1043                         {
1044                         memcpy(dp, sp, COLOR_BYTES);
1045                         sp += COLOR_BYTES;
1046                         dp -= COLOR_BYTES;
1047                         }
1048                 }
1049
1050         rt->spare_tile = src;
1051         *tile = dest;
1052 }
1053
1054 static void rt_tile_mirror_and_flip(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
1055 {
1056         GdkPixbuf *src = *tile;
1057         GdkPixbuf *dest;
1058         gint srs, drs;
1059         guchar *s_pix, *d_pix;
1060         guchar *sp, *dp;
1061         guchar *dpi;
1062         gint i, j;
1063         gint tw = rt->tile_width * rt->hidpi_scale;
1064         gint th = rt->tile_height * rt->hidpi_scale;
1065
1066         srs = gdk_pixbuf_get_rowstride(src);
1067         s_pix = gdk_pixbuf_get_pixels(src);
1068
1069         dest = rt_get_spare_tile(rt);
1070         drs = gdk_pixbuf_get_rowstride(dest);
1071         d_pix = gdk_pixbuf_get_pixels(dest);
1072         dpi = d_pix + (th - 1) * drs + (tw - 1) * COLOR_BYTES;
1073
1074         for (i = y; i < y + h; i++)
1075                 {
1076                 sp = s_pix + (i * srs) + (x * COLOR_BYTES);
1077                 dp = dpi - (i * drs) - (x * COLOR_BYTES);
1078                 for (j = 0; j < w; j++)
1079                         {
1080                         memcpy(dp, sp, COLOR_BYTES);
1081                         sp += COLOR_BYTES;
1082                         dp -= COLOR_BYTES;
1083                         }
1084                 }
1085
1086         rt->spare_tile = src;
1087         *tile = dest;
1088 }
1089
1090 static void rt_tile_flip_only(RendererTiles *rt, GdkPixbuf **tile, gint x, gint y, gint w, gint h)
1091 {
1092         GdkPixbuf *src = *tile;
1093         GdkPixbuf *dest;
1094         gint srs, drs;
1095         guchar *s_pix, *d_pix;
1096         guchar *sp, *dp;
1097         guchar *spi, *dpi;
1098         gint i;
1099         gint th = rt->tile_height * rt->hidpi_scale;
1100
1101         srs = gdk_pixbuf_get_rowstride(src);
1102         s_pix = gdk_pixbuf_get_pixels(src);
1103         spi = s_pix + (x * COLOR_BYTES);
1104
1105         dest = rt_get_spare_tile(rt);
1106         drs = gdk_pixbuf_get_rowstride(dest);
1107         d_pix = gdk_pixbuf_get_pixels(dest);
1108         dpi = d_pix + (th - 1) * drs + (x * COLOR_BYTES);
1109
1110         for (i = y; i < y + h; i++)
1111                 {
1112                 sp = spi + (i * srs);
1113                 dp = dpi - (i * drs);
1114                 memcpy(dp, sp, w * COLOR_BYTES);
1115                 }
1116
1117         rt->spare_tile = src;
1118         *tile = dest;
1119 }
1120
1121 static void rt_tile_apply_orientation(RendererTiles *rt, gint orientation, GdkPixbuf **pixbuf, gint x, gint y, gint w, gint h)
1122 {
1123         switch (orientation)
1124                 {
1125                 case EXIF_ORIENTATION_TOP_LEFT:
1126                         /* normal -- nothing to do */
1127                         break;
1128                 case EXIF_ORIENTATION_TOP_RIGHT:
1129                         /* mirrored */
1130                         {
1131                                 rt_tile_mirror_only(rt, pixbuf, x, y, w, h);
1132                         }
1133                         break;
1134                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
1135                         /* upside down */
1136                         {
1137                                 rt_tile_mirror_and_flip(rt, pixbuf, x, y, w, h);
1138                         }
1139                         break;
1140                 case EXIF_ORIENTATION_BOTTOM_LEFT:
1141                         /* flipped */
1142                         {
1143                                 rt_tile_flip_only(rt, pixbuf, x, y, w, h);
1144                         }
1145                         break;
1146                 case EXIF_ORIENTATION_LEFT_TOP:
1147                         {
1148                                 rt_tile_flip_only(rt, pixbuf, x, y, w, h);
1149                                 rt_tile_rotate_90_clockwise(rt, pixbuf, x, rt->tile_height - y - h, w, h);
1150                         }
1151                         break;
1152                 case EXIF_ORIENTATION_RIGHT_TOP:
1153                         /* rotated -90 (270) */
1154                         {
1155                                 rt_tile_rotate_90_clockwise(rt, pixbuf, x, y, w, h);
1156                         }
1157                         break;
1158                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
1159                         {
1160                                 rt_tile_flip_only(rt, pixbuf, x, y, w, h);
1161                                 rt_tile_rotate_90_counter_clockwise(rt, pixbuf, x, rt->tile_height - y - h, w, h);
1162                         }
1163                         break;
1164                 case EXIF_ORIENTATION_LEFT_BOTTOM:
1165                         /* rotated 90 */
1166                         {
1167                                 rt_tile_rotate_90_counter_clockwise(rt, pixbuf, x, y, w, h);
1168                         }
1169                         break;
1170                 default:
1171                         /* The other values are out of range */
1172                         break;
1173                 }
1174 }
1175
1176 static gboolean rt_source_tile_render(RendererTiles *rt, ImageTile *it,
1177                                       gint x, gint y, gint w, gint h,
1178                                       gboolean new_data, gboolean fast)
1179 {
1180         PixbufRenderer *pr = rt->pr;
1181         GList *list;
1182         GList *work;
1183         gboolean draw = FALSE;
1184
1185         if (pr->zoom == 1.0 || pr->scale == 1.0)
1186                 {
1187                 list = pr_source_tile_compute_region(pr, it->x + x, it->y + y, w, h, TRUE);
1188                 work = list;
1189                 while (work)
1190                         {
1191                         SourceTile *st;
1192                         gint rx, ry, rw, rh;
1193
1194                         st = work->data;
1195                         work = work->next;
1196
1197                         if (pr_clip_region(st->x, st->y, pr->source_tile_width, pr->source_tile_height,
1198                                            it->x + x, it->y + y, w, h,
1199                                            &rx, &ry, &rw, &rh))
1200                                 {
1201                                 cairo_t *cr;
1202                                 cr = cairo_create(it->surface);
1203                                 cairo_rectangle (cr, rx - it->x, ry - it->y, rw, rh);
1204
1205                                 if (st->blank)
1206                                         {
1207                                         cairo_set_source_rgb(cr, 0, 0, 0);
1208                                         cairo_fill (cr);
1209                                         }
1210                                 else /* (pr->zoom == 1.0 || pr->scale == 1.0) */
1211                                         {
1212                                         rt_hidpi_aware_draw(rt, cr, st->pixbuf, -it->x + st->x, -it->y + st->y);
1213                                         }
1214                                 cairo_destroy (cr);
1215                                 }
1216                         }
1217                 }
1218         else
1219                 {
1220                 gdouble scale_x, scale_y;
1221                 gint sx, sy, sw, sh;
1222
1223                 if (pr->image_width == 0 || pr->image_height == 0) return FALSE;
1224                 scale_x = (gdouble)pr->width / pr->image_width;
1225                 scale_y = (gdouble)pr->height / pr->image_height;
1226
1227                 sx = (gdouble)(it->x + x) / scale_x;
1228                 sy = (gdouble)(it->y + y) / scale_y;
1229                 sw = (gdouble)w / scale_x;
1230                 sh = (gdouble)h / scale_y;
1231
1232                 if (pr->width < PR_MIN_SCALE_SIZE || pr->height < PR_MIN_SCALE_SIZE) fast = TRUE;
1233
1234 #if 0
1235                 /* draws red over draw region, to check for leaks (regions not filled) */
1236                 pixbuf_set_rect_fill(it->pixbuf, x, y, w, h, 255, 0, 0, 255);
1237 #endif
1238
1239                 list = pr_source_tile_compute_region(pr, sx, sy, sw, sh, TRUE);
1240                 work = list;
1241                 while (work)
1242                         {
1243                         SourceTile *st;
1244                         gint rx, ry, rw, rh;
1245                         gint stx, sty, stw, sth;
1246
1247                         st = work->data;
1248                         work = work->next;
1249
1250                         stx = floor((gdouble)st->x * scale_x);
1251                         sty = floor((gdouble)st->y * scale_y);
1252                         stw = ceil((gdouble)(st->x + pr->source_tile_width) * scale_x) - stx;
1253                         sth = ceil((gdouble)(st->y + pr->source_tile_height) * scale_y) - sty;
1254
1255                         if (pr_clip_region(stx, sty, stw, sth,
1256                                            it->x + x, it->y + y, w, h,
1257                                            &rx, &ry, &rw, &rh))
1258                                 {
1259
1260                                 if (st->blank)
1261                                         {
1262                                         cairo_t *cr;
1263                                         cr = cairo_create(it->surface);
1264                                         cairo_rectangle (cr, rx - st->x, ry - st->y, rw, rh);
1265                                         cairo_set_source_rgb(cr, 0, 0, 0);
1266                                         cairo_fill (cr);
1267                                         cairo_destroy (cr);
1268                                         }
1269                                 else
1270                                         {
1271                                         gdouble offset_x;
1272                                         gdouble offset_y;
1273
1274                                         /* may need to use unfloored stx,sty values here */
1275                                         offset_x = (gdouble)(stx - it->x);
1276                                         offset_y = (gdouble)(sty - it->y);
1277
1278                                         gdk_pixbuf_scale(st->pixbuf, it->pixbuf, rx - it->x, ry - it->y, rw, rh,
1279                                                  (gdouble) 0.0 + offset_x,
1280                                                  (gdouble) 0.0 + offset_y,
1281                                                  scale_x, scale_y,
1282                                                  (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality);
1283                                         draw = TRUE;
1284                                         }
1285                                 }
1286                         }
1287                 }
1288
1289         g_list_free(list);
1290
1291         return draw;
1292 }
1293
1294 static void rt_tile_get_region(gboolean has_alpha, gboolean ignore_alpha,
1295                                const GdkPixbuf *src, GdkPixbuf *dest,
1296                                int pb_x, int pb_y, int pb_w, int pb_h,
1297                                double offset_x, double offset_y, double scale_x, double scale_y,
1298                                GdkInterpType interp_type,
1299                                int check_x, int check_y)
1300 {
1301         GdkPixbuf* tmppixbuf;
1302
1303         if (!has_alpha)
1304                 {
1305                 if (scale_x == 1.0 && scale_y == 1.0)
1306                         {
1307                         gdk_pixbuf_copy_area(src,
1308                                              -offset_x + pb_x, -offset_y + pb_y,
1309                                              pb_w, pb_h,
1310                                              dest,
1311                                              pb_x, pb_y);
1312                         }
1313                 else
1314                         {
1315                         gdk_pixbuf_scale(src, dest,
1316                                          pb_x, pb_y, pb_w, pb_h,
1317                                          offset_x,
1318                                          offset_y,
1319                                          scale_x, scale_y,
1320                                          interp_type);
1321                         }
1322                 }
1323         else
1324                 {
1325                 if (ignore_alpha)
1326                         {
1327                         tmppixbuf = gdk_pixbuf_add_alpha(src, FALSE, 0, 0, 0);
1328
1329                         pixbuf_ignore_alpha_rect(tmppixbuf, 0, 0, gdk_pixbuf_get_width(src), gdk_pixbuf_get_height(src));
1330
1331                         gdk_pixbuf_composite_color(tmppixbuf, dest,
1332                                         pb_x, pb_y, pb_w, pb_h,
1333                                         offset_x,
1334                                         offset_y,
1335                                         scale_x, scale_y,
1336                                         (scale_x == 1.0 && scale_y == 1.0) ? GDK_INTERP_NEAREST : interp_type,
1337                                         255, check_x, check_y,
1338                                         PR_ALPHA_CHECK_SIZE,
1339                                         ((options->image.alpha_color_1.red << 8 & 0x00FF0000) +
1340                                         (options->image.alpha_color_1.green & 0x00FF00) +
1341                                         (options->image.alpha_color_1.blue >> 8 & 0x00FF)),
1342                                         ((options->image.alpha_color_2.red << 8 & 0x00FF0000) +
1343                                         (options->image.alpha_color_2.green & 0x00FF00) +
1344                                         (options->image.alpha_color_2.blue >> 8 & 0x00FF)));
1345                         g_object_unref(tmppixbuf);
1346                         }
1347                 else
1348                         {
1349                         gdk_pixbuf_composite_color(src, dest,
1350                                         pb_x, pb_y, pb_w, pb_h,
1351                                         offset_x,
1352                                         offset_y,
1353                                         scale_x, scale_y,
1354                                         (scale_x == 1.0 && scale_y == 1.0) ? GDK_INTERP_NEAREST : interp_type,
1355                                         255, check_x, check_y,
1356                                         PR_ALPHA_CHECK_SIZE,
1357                                         ((options->image.alpha_color_1.red << 8 & 0x00FF0000) +
1358                                         (options->image.alpha_color_1.green & 0x00FF00) +
1359                                         (options->image.alpha_color_1.blue >> 8 & 0x00FF)),
1360                                         ((options->image.alpha_color_2.red << 8 & 0x00FF0000) +
1361                                         (options->image.alpha_color_2.green & 0x00FF00) +
1362                                         (options->image.alpha_color_2.blue >> 8 & 0x00FF)));
1363                         }
1364                 }
1365 }
1366
1367
1368 static gint rt_get_orientation(RendererTiles *rt)
1369 {
1370         PixbufRenderer *pr = rt->pr;
1371
1372         gint orientation = pr->orientation;
1373         static const gint mirror[]       = {1,   2, 1, 4, 3, 6, 5, 8, 7};
1374         static const gint flip[]         = {1,   4, 3, 2, 1, 8, 7, 6, 5};
1375
1376         if (rt->stereo_mode & PR_STEREO_MIRROR) orientation = mirror[orientation];
1377         if (rt->stereo_mode & PR_STEREO_FLIP) orientation = flip[orientation];
1378         return orientation;
1379 }
1380
1381
1382 static void rt_tile_render(RendererTiles *rt, ImageTile *it,
1383                            gint x, gint y, gint w, gint h,
1384                            gboolean new_data, gboolean fast)
1385 {
1386         PixbufRenderer *pr = rt->pr;
1387         gboolean has_alpha;
1388         gboolean draw = FALSE;
1389         gint orientation = rt_get_orientation(rt);
1390
1391         if (it->render_todo == TILE_RENDER_NONE && it->surface && !new_data) return;
1392
1393         if (it->render_done != TILE_RENDER_ALL)
1394                 {
1395                 x = 0;
1396                 y = 0;
1397                 w = it->w;
1398                 h = it->h;
1399                 if (!fast) it->render_done = TILE_RENDER_ALL;
1400                 }
1401         else if (it->render_todo != TILE_RENDER_AREA)
1402                 {
1403                 if (!fast) it->render_todo = TILE_RENDER_NONE;
1404                 return;
1405                 }
1406
1407         if (!fast) it->render_todo = TILE_RENDER_NONE;
1408
1409         if (new_data) it->blank = FALSE;
1410
1411         rt_tile_prepare(rt, it);
1412         has_alpha = (pr->pixbuf && gdk_pixbuf_get_has_alpha(pr->pixbuf));
1413
1414         /* FIXME checker colors for alpha should be configurable,
1415          * also should be drawn for blank = TRUE
1416          */
1417
1418         if (it->blank)
1419                 {
1420                 /* no data, do fast rect fill */
1421                 cairo_t *cr;
1422                 cr = cairo_create(it->surface);
1423                 cairo_rectangle (cr, 0, 0, it->w, it->h);
1424                 cairo_set_source_rgb(cr, 0, 0, 0);
1425                 cairo_fill (cr);
1426                 cairo_destroy (cr);
1427                 }
1428         else if (pr->source_tiles_enabled)
1429                 {
1430                 draw = rt_source_tile_render(rt, it, x, y, w, h, new_data, fast);
1431                 }
1432         else
1433                 {
1434                 gdouble scale_x, scale_y;
1435                 gdouble src_x, src_y;
1436                 gint pb_x, pb_y;
1437                 gint pb_w, pb_h;
1438
1439                 if (pr->image_width == 0 || pr->image_height == 0) return;
1440
1441                 scale_x = rt->hidpi_scale * (gdouble)pr->width / pr->image_width;
1442                 scale_y = rt->hidpi_scale * (gdouble)pr->height / pr->image_height;
1443
1444                 pr_tile_coords_map_orientation(orientation, it->x, it->y,
1445                                             pr->width, pr->height,
1446                                             rt->tile_width, rt->tile_height,
1447                                             &src_x, &src_y);
1448                 pr_tile_region_map_orientation(orientation, x, y,
1449                                             rt->tile_width, rt->tile_height,
1450                                             w, h,
1451                                             &pb_x, &pb_y,
1452                                             &pb_w, &pb_h);
1453
1454                 src_x *= rt->hidpi_scale;
1455                 src_y *= rt->hidpi_scale;
1456                 pb_x *= rt->hidpi_scale;
1457                 pb_y *= rt->hidpi_scale;
1458                 pb_w *= rt->hidpi_scale;
1459                 pb_h *= rt->hidpi_scale;
1460
1461                 switch (orientation)
1462                         {
1463                         gdouble tmp;
1464                         case EXIF_ORIENTATION_LEFT_TOP:
1465                         case EXIF_ORIENTATION_RIGHT_TOP:
1466                         case EXIF_ORIENTATION_RIGHT_BOTTOM:
1467                         case EXIF_ORIENTATION_LEFT_BOTTOM:
1468                                 tmp = scale_x;
1469                                 scale_x = scale_y;
1470                                 scale_y = tmp;
1471                                 break;
1472                         default:
1473                                 /* nothing to do */
1474                                 break;
1475                         }
1476
1477                 /* HACK: The pixbuf scalers get kinda buggy(crash) with extremely
1478                  * small sizes for anything but GDK_INTERP_NEAREST
1479                  */
1480                 if (pr->width < PR_MIN_SCALE_SIZE || pr->height < PR_MIN_SCALE_SIZE) fast = TRUE;
1481
1482                 rt_tile_get_region(has_alpha, pr->ignore_alpha,
1483                                    pr->pixbuf, it->pixbuf, pb_x, pb_y, pb_w, pb_h,
1484                                    (gdouble) 0.0 - src_x - GET_RIGHT_PIXBUF_OFFSET(rt) * scale_x,
1485                                    (gdouble) 0.0 - src_y,
1486                                    scale_x, scale_y,
1487                                    (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality,
1488                                    it->x + pb_x, it->y + pb_y);
1489                 if (rt->stereo_mode & PR_STEREO_ANAGLYPH &&
1490                     (pr->stereo_pixbuf_offset_right > 0 || pr->stereo_pixbuf_offset_left > 0))
1491                         {
1492                         GdkPixbuf *right_pb = rt_get_spare_tile(rt);
1493                         rt_tile_get_region(has_alpha, pr->ignore_alpha,
1494                                            pr->pixbuf, right_pb, pb_x, pb_y, pb_w, pb_h,
1495                                            (gdouble) 0.0 - src_x - GET_LEFT_PIXBUF_OFFSET(rt) * scale_x,
1496                                            (gdouble) 0.0 - src_y,
1497                                            scale_x, scale_y,
1498                                            (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality,
1499                                            it->x + pb_x, it->y + pb_y);
1500                         pr_create_anaglyph(rt->stereo_mode, it->pixbuf, right_pb, pb_x, pb_y, pb_w, pb_h);
1501                         /* do not care about freeing spare_tile, it will be reused */
1502                         }
1503                 rt_tile_apply_orientation(rt, orientation, &it->pixbuf, pb_x, pb_y, pb_w, pb_h);
1504                 draw = TRUE;
1505                 }
1506
1507         if (draw && it->pixbuf && !it->blank)
1508                 {
1509                 cairo_t *cr;
1510
1511                 if (pr->func_post_process && !(pr->post_process_slow && fast))
1512                         pr->func_post_process(pr, &it->pixbuf, x, y, w, h, pr->post_process_user_data);
1513
1514                 cr = cairo_create(it->surface);
1515                 cairo_rectangle (cr, x, y, w, h);
1516                 rt_hidpi_aware_draw(rt, cr, it->pixbuf, 0, 0);
1517                 cairo_destroy (cr);
1518                 }
1519 }
1520
1521
1522 static void rt_tile_expose(RendererTiles *rt, ImageTile *it,
1523                            gint x, gint y, gint w, gint h,
1524                            gboolean new_data, gboolean fast)
1525 {
1526         PixbufRenderer *pr = rt->pr;
1527         GtkWidget *box;
1528         GdkWindow *window;
1529         cairo_t *cr;
1530
1531         /* clamp to visible */
1532         if (it->x + x < rt->x_scroll)
1533                 {
1534                 w -= rt->x_scroll - it->x - x;
1535                 x = rt->x_scroll - it->x;
1536                 }
1537         if (it->x + x + w > rt->x_scroll + pr->vis_width)
1538                 {
1539                 w = rt->x_scroll + pr->vis_width - it->x - x;
1540                 }
1541         if (w < 1) return;
1542         if (it->y + y < rt->y_scroll)
1543                 {
1544                 h -= rt->y_scroll - it->y - y;
1545                 y = rt->y_scroll - it->y;
1546                 }
1547         if (it->y + y + h > rt->y_scroll + pr->vis_height)
1548                 {
1549                 h = rt->y_scroll + pr->vis_height - it->y - y;
1550                 }
1551         if (h < 1) return;
1552
1553         rt_tile_render(rt, it, x, y, w, h, new_data, fast);
1554
1555         box = GTK_WIDGET(pr);
1556         window = gtk_widget_get_window(box);
1557
1558 #if GTK_CHECK_VERSION(3,0,0)
1559         cr = cairo_create(rt->surface);
1560 #else
1561         cr = gdk_cairo_create(window);
1562 #endif
1563         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);
1564         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);
1565         cairo_fill (cr);
1566         cairo_destroy (cr);
1567
1568         if (rt->overlay_list)
1569                 {
1570                 rt_overlay_draw(rt, pr->x_offset + (it->x - rt->x_scroll) + x,
1571                                 pr->y_offset + (it->y - rt->y_scroll) + y,
1572                                 w, h,
1573                                 it);
1574                 }
1575
1576 #if GTK_CHECK_VERSION(3,0,0)
1577         gtk_widget_queue_draw(GTK_WIDGET(rt->pr));
1578 #endif
1579 }
1580
1581
1582 static gboolean rt_tile_is_visible(RendererTiles *rt, ImageTile *it)
1583 {
1584         PixbufRenderer *pr = rt->pr;
1585         return (it->x + it->w >= rt->x_scroll && it->x < rt->x_scroll + pr->vis_width &&
1586                 it->y + it->h >= rt->y_scroll && it->y < rt->y_scroll + pr->vis_height);
1587 }
1588
1589 /*
1590  *-------------------------------------------------------------------
1591  * draw queue
1592  *-------------------------------------------------------------------
1593  */
1594
1595 static gint rt_get_queued_area(GList *work)
1596 {
1597         gint area = 0;
1598
1599         while (work)
1600                 {
1601                 QueueData *qd = work->data;
1602                 area += qd->w * qd->h;
1603                 work = work->next;
1604                 }
1605         return area;
1606 }
1607
1608
1609 static gboolean rt_queue_schedule_next_draw(RendererTiles *rt, gboolean force_set)
1610 {
1611         PixbufRenderer *pr = rt->pr;
1612         gfloat percent;
1613         gint visible_area = pr->vis_width * pr->vis_height;
1614
1615         if (!pr->loading)
1616                 {
1617                 /* 2pass prio */
1618                 DEBUG_2("redraw priority: 2pass");
1619                 rt->draw_idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, rt_queue_draw_idle_cb, rt, NULL);
1620                 return FALSE;
1621                 }
1622
1623         if (visible_area == 0)
1624                 {
1625                 /* not known yet */
1626                 percent = 100.0;
1627                 }
1628         else
1629                 {
1630                 percent = 100.0 * rt_get_queued_area(rt->draw_queue) / visible_area;
1631                 }
1632
1633         if (percent > 10.0)
1634                 {
1635                 /* we have enough data for starting intensive redrawing */
1636                 DEBUG_2("redraw priority: high %.2f %%", percent);
1637                 rt->draw_idle_id = g_idle_add_full(GDK_PRIORITY_REDRAW, rt_queue_draw_idle_cb, rt, NULL);
1638                 return FALSE;
1639                 }
1640
1641         if (percent < 1.0 || force_set)
1642                 {
1643                 /* queue is (almost) empty, wait  50 ms*/
1644                 DEBUG_2("redraw priority: wait %.2f %%", percent);
1645                 rt->draw_idle_id = g_timeout_add_full(G_PRIORITY_DEFAULT_IDLE, 50, rt_queue_draw_idle_cb, rt, NULL);
1646                 return FALSE;
1647                 }
1648
1649         /* keep the same priority as before */
1650         DEBUG_2("redraw priority: no change %.2f %%", percent);
1651         return TRUE;
1652 }
1653
1654
1655 static gboolean rt_queue_draw_idle_cb(gpointer data)
1656 {
1657         RendererTiles *rt = data;
1658         PixbufRenderer *pr = rt->pr;
1659         QueueData *qd;
1660         gboolean fast;
1661
1662
1663         if ((!pr->pixbuf && !pr->source_tiles_enabled) ||
1664             (!rt->draw_queue && !rt->draw_queue_2pass) ||
1665             !rt->draw_idle_id)
1666                 {
1667                 pr_render_complete_signal(pr);
1668
1669                 rt->draw_idle_id = 0;
1670                 return FALSE;
1671                 }
1672
1673         if (rt->draw_queue)
1674                 {
1675                 qd = rt->draw_queue->data;
1676                 fast = (pr->zoom_2pass && ((pr->zoom_quality != GDK_INTERP_NEAREST && pr->scale != 1.0) || pr->post_process_slow));
1677                 }
1678         else
1679                 {
1680                 if (pr->loading)
1681                         {
1682                         /* still loading, wait till done (also drops the higher priority) */
1683
1684                         return rt_queue_schedule_next_draw(rt, FALSE);
1685                         }
1686
1687                 qd = rt->draw_queue_2pass->data;
1688                 fast = FALSE;
1689                 }
1690
1691         if (gtk_widget_get_realized(GTK_WIDGET(pr)))
1692                 {
1693                 if (rt_tile_is_visible(rt, qd->it))
1694                         {
1695                         rt_tile_expose(rt, qd->it, qd->x, qd->y, qd->w, qd->h, qd->new_data, fast);
1696                         }
1697                 else if (qd->new_data)
1698                         {
1699                         /* if new pixel data, and we already have a pixmap, update the tile */
1700                         qd->it->blank = FALSE;
1701                         if (qd->it->surface && qd->it->render_done == TILE_RENDER_ALL)
1702                                 {
1703                                 rt_tile_render(rt, qd->it, qd->x, qd->y, qd->w, qd->h, qd->new_data, fast);
1704                                 }
1705                         }
1706                 }
1707
1708         if (rt->draw_queue)
1709                 {
1710                 qd->it->qd = NULL;
1711                 rt->draw_queue = g_list_remove(rt->draw_queue, qd);
1712                 if (fast)
1713                         {
1714                         if (qd->it->qd2)
1715                                 {
1716                                 rt_queue_merge(qd->it->qd2, qd);
1717                                 g_free(qd);
1718                                 }
1719                         else
1720                                 {
1721                                 qd->it->qd2 = qd;
1722                                 rt->draw_queue_2pass = g_list_append(rt->draw_queue_2pass, qd);
1723                                 }
1724                         }
1725                 else
1726                         {
1727                         g_free(qd);
1728                         }
1729                 }
1730         else
1731                 {
1732                 qd->it->qd2 = NULL;
1733                 rt->draw_queue_2pass = g_list_remove(rt->draw_queue_2pass, qd);
1734                 g_free(qd);
1735                 }
1736
1737         if (!rt->draw_queue && !rt->draw_queue_2pass)
1738                 {
1739                 pr_render_complete_signal(pr);
1740
1741                 rt->draw_idle_id = 0;
1742                 return FALSE;
1743                 }
1744
1745                 return rt_queue_schedule_next_draw(rt, FALSE);
1746 }
1747
1748 static void rt_queue_list_free(GList *list)
1749 {
1750         GList *work;
1751
1752         work = list;
1753         while (work)
1754                 {
1755                 QueueData *qd;
1756
1757                 qd = work->data;
1758                 work = work->next;
1759
1760                 qd->it->qd = NULL;
1761                 qd->it->qd2 = NULL;
1762                 g_free(qd);
1763                 }
1764
1765         g_list_free(list);
1766 }
1767
1768 static void rt_queue_clear(RendererTiles *rt)
1769 {
1770         rt_queue_list_free(rt->draw_queue);
1771         rt->draw_queue = NULL;
1772
1773         rt_queue_list_free(rt->draw_queue_2pass);
1774         rt->draw_queue_2pass = NULL;
1775
1776         if (rt->draw_idle_id)
1777                 {
1778                 g_source_remove(rt->draw_idle_id);
1779                 rt->draw_idle_id = 0;
1780                 }
1781         rt_sync_scroll(rt);
1782 }
1783
1784 static void rt_queue_merge(QueueData *parent, QueueData *qd)
1785 {
1786         if (parent->x + parent->w < qd->x + qd->w)
1787                 {
1788                 parent->w += (qd->x + qd->w) - (parent->x + parent->w);
1789                 }
1790         if (parent->x > qd->x)
1791                 {
1792                 parent->w += parent->x - qd->x;
1793                 parent->x = qd->x;
1794                 }
1795
1796         if (parent->y + parent->h < qd->y + qd->h)
1797                 {
1798                 parent->h += (qd->y + qd->h) - (parent->y + parent->h);
1799                 }
1800         if (parent->y > qd->y)
1801                 {
1802                 parent->h += parent->y - qd->y;
1803                 parent->y = qd->y;
1804                 }
1805
1806         parent->new_data |= qd->new_data;
1807 }
1808
1809 static gboolean rt_clamp_to_visible(RendererTiles *rt, gint *x, gint *y, gint *w, gint *h)
1810 {
1811         PixbufRenderer *pr = rt->pr;
1812         gint nx, ny;
1813         gint nw, nh;
1814         gint vx, vy;
1815         gint vw, vh;
1816
1817         vw = pr->vis_width;
1818         vh = pr->vis_height;
1819
1820         vx = rt->x_scroll;
1821         vy = rt->y_scroll;
1822
1823         if (*x + *w < vx || *x > vx + vw || *y + *h < vy || *y > vy + vh) return FALSE;
1824
1825         /* now clamp it */
1826         nx = CLAMP(*x, vx, vx + vw);
1827         nw = CLAMP(*w - (nx - *x), 1, vw);
1828
1829         ny = CLAMP(*y, vy, vy + vh);
1830         nh = CLAMP(*h - (ny - *y), 1, vh);
1831
1832         *x = nx;
1833         *y = ny;
1834         *w = nw;
1835         *h = nh;
1836
1837         return TRUE;
1838 }
1839
1840 static gboolean rt_queue_to_tiles(RendererTiles *rt, gint x, gint y, gint w, gint h,
1841                                   gboolean clamp, ImageRenderType render,
1842                                   gboolean new_data, gboolean only_existing)
1843 {
1844         PixbufRenderer *pr = rt->pr;
1845         gint i, j;
1846         gint x1, x2;
1847         gint y1, y2;
1848
1849         if (clamp && !rt_clamp_to_visible(rt, &x, &y, &w, &h)) return FALSE;
1850
1851         x1 = ROUND_DOWN(x, rt->tile_width);
1852         x2 = ROUND_UP(x + w, rt->tile_width);
1853
1854         y1 = ROUND_DOWN(y, rt->tile_height);
1855         y2 = ROUND_UP(y + h, rt->tile_height);
1856
1857         for (j = y1; j <= y2; j += rt->tile_height)
1858                 {
1859                 for (i = x1; i <= x2; i += rt->tile_width)
1860                         {
1861                         ImageTile *it;
1862
1863                         it = rt_tile_get(rt, i, j,
1864                                          (only_existing &&
1865                                           (i + rt->tile_width < rt->x_scroll ||
1866                                            i > rt->x_scroll + pr->vis_width ||
1867                                            j + rt->tile_height < rt->y_scroll ||
1868                                            j > rt->y_scroll + pr->vis_height)));
1869                         if (it)
1870                                 {
1871                                 QueueData *qd;
1872
1873                                 if ((render == TILE_RENDER_ALL && it->render_done != TILE_RENDER_ALL) ||
1874                                     (render == TILE_RENDER_AREA && it->render_todo != TILE_RENDER_ALL))
1875                                         {
1876                                         it->render_todo = render;
1877                                         }
1878
1879                                 qd = g_new(QueueData, 1);
1880                                 qd->it = it;
1881                                 qd->new_data = new_data;
1882
1883                                 if (i < x)
1884                                         {
1885                                         qd->x = x - i;
1886                                         }
1887                                 else
1888                                         {
1889                                         qd->x = 0;
1890                                         }
1891                                 qd->w = x + w - i - qd->x;
1892                                 if (qd->x + qd->w > rt->tile_width) qd->w = rt->tile_width - qd->x;
1893
1894                                 if (j < y)
1895                                         {
1896                                         qd->y = y - j;
1897                                         }
1898                                 else
1899                                         {
1900                                         qd->y = 0;
1901                                         }
1902                                 qd->h = y + h - j - qd->y;
1903                                 if (qd->y + qd->h > rt->tile_height) qd->h = rt->tile_height - qd->y;
1904
1905                                 if (qd->w < 1 || qd->h < 1)
1906                                         {
1907                                         g_free(qd);
1908                                         }
1909                                 else if (it->qd)
1910                                         {
1911                                         rt_queue_merge(it->qd, qd);
1912                                         g_free(qd);
1913                                         }
1914                                 else
1915                                         {
1916                                         it->qd = qd;
1917                                         rt->draw_queue = g_list_append(rt->draw_queue, qd);
1918                                         }
1919                                 }
1920                         }
1921                 }
1922
1923         return TRUE;
1924 }
1925
1926 static void rt_queue(RendererTiles *rt, gint x, gint y, gint w, gint h,
1927                      gboolean clamp, ImageRenderType render,
1928                      gboolean new_data, gboolean only_existing)
1929 {
1930         PixbufRenderer *pr = rt->pr;
1931         gint nx, ny;
1932
1933         rt_sync_scroll(rt);
1934
1935         nx = CLAMP(x, 0, pr->width - 1);
1936         ny = CLAMP(y, 0, pr->height - 1);
1937         w -= (nx - x);
1938         h -= (ny - y);
1939         w = CLAMP(w, 0, pr->width - nx);
1940         h = CLAMP(h, 0, pr->height - ny);
1941         if (w < 1 || h < 1) return;
1942
1943         if (rt_queue_to_tiles(rt, nx, ny, w, h, clamp, render, new_data, only_existing) &&
1944             ((!rt->draw_queue && !rt->draw_queue_2pass) || !rt->draw_idle_id))
1945                 {
1946                 if (rt->draw_idle_id)
1947                         {
1948                         g_source_remove(rt->draw_idle_id);
1949                         rt->draw_idle_id = 0;
1950                         }
1951                 rt_queue_schedule_next_draw(rt, TRUE);
1952                 }
1953 }
1954
1955 static void rt_scroll(void *renderer, gint x_off, gint y_off)
1956 {
1957         RendererTiles *rt = (RendererTiles *) renderer;
1958         PixbufRenderer *pr = rt->pr;
1959
1960         rt_sync_scroll(rt);
1961         if (rt->stereo_mode & PR_STEREO_MIRROR) x_off = -x_off;
1962         if (rt->stereo_mode & PR_STEREO_FLIP) y_off = -y_off;
1963
1964         gint w = pr->vis_width - abs(x_off);
1965         gint h = pr->vis_height - abs(y_off);
1966
1967         if (w < 1 || h < 1)
1968                 {
1969                 /* scrolled completely to new material */
1970                 rt_queue(rt, 0, 0, pr->width, pr->height, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
1971                 return;
1972                 }
1973         else
1974                 {
1975                 gint x1, y1;
1976                 gint x2, y2;
1977                 GtkWidget *box;
1978                 GdkWindow *window;
1979                 cairo_t *cr;
1980                 cairo_surface_t *surface;
1981
1982                 if (x_off < 0)
1983                         {
1984                         x1 = abs(x_off);
1985                         x2 = 0;
1986                         }
1987                 else
1988                         {
1989                         x1 = 0;
1990                         x2 = abs(x_off);
1991                         }
1992
1993                 if (y_off < 0)
1994                         {
1995                         y1 = abs(y_off);
1996                         y2 = 0;
1997                         }
1998                 else
1999                         {
2000                         y1 = 0;
2001                         y2 = abs(y_off);
2002                         }
2003
2004 #if GTK_CHECK_VERSION(3,0,0)
2005                 cr = cairo_create(rt->surface);
2006                 surface = rt->surface;
2007 #else
2008                 box = GTK_WIDGET(pr);
2009                 window = gtk_widget_get_window(box);
2010
2011                 cr = gdk_cairo_create(window);
2012                 surface = cairo_get_target(cr);
2013 #endif
2014                 /* clipping restricts the intermediate surface's size, so it's a good idea
2015                  * to use it. */
2016                 cairo_rectangle(cr, x1 + pr->x_offset + rt->stereo_off_x, y1 + pr->y_offset + rt->stereo_off_y, w, h);
2017                 cairo_clip (cr);
2018                 /* Now push a group to change the target */
2019                 cairo_push_group (cr);
2020                 cairo_set_source_surface(cr, surface, x1 - x2, y1 - y2);
2021                 cairo_paint(cr);
2022                 /* Now copy the intermediate target back */
2023                 cairo_pop_group_to_source(cr);
2024                 cairo_paint(cr);
2025                 cairo_destroy(cr);
2026
2027                 rt_overlay_queue_all(rt, x2, y2, x1, y1);
2028
2029                 w = pr->vis_width - w;
2030                 h = pr->vis_height - h;
2031
2032                 if (w > 0)
2033                         {
2034                         rt_queue(rt,
2035                                     x_off > 0 ? rt->x_scroll + (pr->vis_width - w) : rt->x_scroll, rt->y_scroll,
2036                                     w, pr->vis_height, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
2037                         }
2038                 if (h > 0)
2039                         {
2040                         /* FIXME, to optimize this, remove overlap */
2041                         rt_queue(rt,
2042                                     rt->x_scroll, y_off > 0 ? rt->y_scroll + (pr->vis_height - h) : rt->y_scroll,
2043                                     pr->vis_width, h, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
2044                         }
2045                 }
2046 }
2047
2048 static void renderer_area_changed(void *renderer, gint src_x, gint src_y, gint src_w, gint src_h)
2049 {
2050         RendererTiles *rt = (RendererTiles *)renderer;
2051         PixbufRenderer *pr = rt->pr;
2052         gint x, y, width, height,  x1, y1, x2, y2;
2053
2054         gint orientation = rt_get_orientation(rt);
2055         pr_coords_map_orientation_reverse(orientation,
2056                                      src_x - GET_RIGHT_PIXBUF_OFFSET(rt), src_y,
2057                                      pr->image_width, pr->image_height,
2058                                      src_w, src_h,
2059                                      &x, &y,
2060                                      &width, &height);
2061
2062         if (pr->scale != 1.0 && pr->zoom_quality != GDK_INTERP_NEAREST)
2063                 {
2064                 /* increase region when using a zoom quality that may access surrounding pixels */
2065                 y -= 1;
2066                 height += 2;
2067                 }
2068
2069         x1 = (gint)floor((gdouble)x * pr->scale);
2070         y1 = (gint)floor((gdouble)y * pr->scale * pr->aspect_ratio);
2071         x2 = (gint)ceil((gdouble)(x + width) * pr->scale);
2072         y2 = (gint)ceil((gdouble)(y + height) * pr->scale * pr->aspect_ratio);
2073
2074         rt_queue(rt, x1, y1, x2 - x1, y2 - y1, FALSE, TILE_RENDER_AREA, TRUE, TRUE);
2075 }
2076
2077 static void renderer_redraw(RendererTiles *rt, gint x, gint y, gint w, gint h,
2078                      gint clamp, ImageRenderType render, gboolean new_data, gboolean only_existing)
2079 {
2080         PixbufRenderer *pr = rt->pr;
2081
2082         x -= rt->stereo_off_x;
2083         y -= rt->stereo_off_y;
2084
2085         rt_border_draw(rt, x, y, w, h);
2086
2087         x = MAX(0, x - pr->x_offset + pr->x_scroll);
2088         y = MAX(0, y - pr->y_offset + pr->y_scroll);
2089
2090         rt_queue(rt,
2091                  x, y,
2092                  MIN(w, pr->width - x),
2093                  MIN(h, pr->height - y),
2094                  clamp, render, new_data, only_existing);
2095 }
2096
2097 static void renderer_update_pixbuf(void *renderer, gboolean lazy)
2098 {
2099         rt_queue_clear((RendererTiles *)renderer);
2100 }
2101
2102 static void renderer_update_zoom(void *renderer, gboolean lazy)
2103 {
2104         RendererTiles *rt = (RendererTiles *)renderer;
2105         PixbufRenderer *pr = rt->pr;
2106
2107         rt_tile_invalidate_all((RendererTiles *)renderer);
2108         if (!lazy)
2109                 {
2110                 renderer_redraw(renderer, 0, 0, pr->width, pr->height, TRUE, TILE_RENDER_ALL, TRUE, FALSE);
2111                 }
2112         rt_border_clear(rt);
2113 }
2114
2115 static void renderer_invalidate_region(void *renderer, gint x, gint y, gint w, gint h)
2116 {
2117         rt_tile_invalidate_region((RendererTiles *)renderer, x, y, w, h);
2118 }
2119
2120 static void renderer_update_viewport(void *renderer)
2121 {
2122         RendererTiles *rt = (RendererTiles *)renderer;
2123
2124         rt->stereo_off_x = 0;
2125         rt->stereo_off_y = 0;
2126
2127         if (rt->stereo_mode & PR_STEREO_RIGHT)
2128                 {
2129                 if (rt->stereo_mode & PR_STEREO_HORIZ)
2130                         {
2131                         rt->stereo_off_x = rt->pr->viewport_width;
2132                         }
2133                 else if (rt->stereo_mode & PR_STEREO_VERT)
2134                         {
2135                         rt->stereo_off_y = rt->pr->viewport_height;
2136                         }
2137                 else if (rt->stereo_mode & PR_STEREO_FIXED)
2138                         {
2139                         rt->stereo_off_x = rt->pr->stereo_fixed_x_right;
2140                         rt->stereo_off_y = rt->pr->stereo_fixed_y_right;
2141                         }
2142                 }
2143         else
2144                 {
2145                 if (rt->stereo_mode & PR_STEREO_FIXED)
2146                         {
2147                         rt->stereo_off_x = rt->pr->stereo_fixed_x_left;
2148                         rt->stereo_off_y = rt->pr->stereo_fixed_y_left;
2149                         }
2150                 }
2151         DEBUG_1("update size: %p  %d %d   %d %d", rt, rt->stereo_off_x, rt->stereo_off_y, rt->pr->viewport_width, rt->pr->viewport_height);
2152         rt_sync_scroll(rt);
2153         rt_overlay_update_sizes(rt);
2154         rt_border_clear(rt);
2155 }
2156
2157 static void renderer_stereo_set(void *renderer, gint stereo_mode)
2158 {
2159         RendererTiles *rt = (RendererTiles *)renderer;
2160
2161         rt->stereo_mode = stereo_mode;
2162 }
2163
2164 static void renderer_free(void *renderer)
2165 {
2166         RendererTiles *rt = (RendererTiles *)renderer;
2167         rt_queue_clear(rt);
2168         rt_tile_free_all(rt);
2169         if (rt->spare_tile) g_object_unref(rt->spare_tile);
2170         if (rt->overlay_buffer) g_object_unref(rt->overlay_buffer);
2171         rt_overlay_list_clear(rt);
2172         /* disconnect "hierarchy-changed" */
2173         g_signal_handlers_disconnect_matched(G_OBJECT(rt->pr), G_SIGNAL_MATCH_DATA,
2174                                                      0, 0, 0, NULL, rt);
2175         g_free(rt);
2176 }
2177
2178 #if GTK_CHECK_VERSION(3,0,0)
2179 static gboolean rt_realize_cb(GtkWidget *widget, gpointer data)
2180 {
2181         RendererTiles *rt = (RendererTiles *)data;
2182         cairo_t *cr;
2183
2184         if (!rt->surface)
2185                 {
2186                 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));
2187
2188                 cr = cairo_create(rt->surface);
2189                 cairo_set_source_rgb(cr, (gdouble)options->image.border_color.red  /65535, (gdouble)options->image.border_color.green / 65535, (gdouble)options->image.border_color.blue / 65535);
2190                 cairo_paint(cr);
2191                 cairo_destroy(cr);
2192                 }
2193
2194         return FALSE;
2195 }
2196
2197 static gboolean rt_size_allocate_cb(GtkWidget *widget,  GdkRectangle *allocation, gpointer data)
2198 {
2199         RendererTiles *rt = data;
2200         cairo_t *cr;
2201         cairo_surface_t *old_surface;
2202
2203         if (gtk_widget_get_realized(GTK_WIDGET(rt->pr)))
2204                 {
2205                 old_surface = rt->surface;
2206                 rt->surface = gdk_window_create_similar_surface(gtk_widget_get_window(widget), CAIRO_CONTENT_COLOR, allocation->width, allocation->height);
2207
2208                 cr = cairo_create(rt->surface);
2209
2210                 cairo_set_source_rgb(cr, (gdouble)options->image.border_color.red / 65535, (gdouble)options->image.border_color.green / 65535, (gdouble)options->image.border_color.blue / 65535);
2211                 cairo_paint(cr);
2212                 cairo_set_source_surface(cr, old_surface, 0, 0);
2213                 cairo_paint(cr);
2214                 cairo_destroy(cr);
2215                 cairo_surface_destroy(old_surface);
2216
2217                 renderer_redraw(rt, allocation->x, allocation->y, allocation->width, allocation->height, FALSE, TILE_RENDER_ALL, FALSE, FALSE);
2218         }
2219
2220         return FALSE;
2221 }
2222
2223 static gboolean rt_draw_cb(GtkWidget *widget, cairo_t *cr, gpointer data)
2224 {
2225         RendererTiles *rt = (RendererTiles *)data;
2226         GList *work;
2227         OverlayData *od;
2228
2229         cairo_set_source_surface (cr, rt->surface, 0, 0);
2230         cairo_paint(cr);
2231
2232         work = rt->overlay_list;
2233         while (work)
2234                 {
2235                 od = work->data;
2236                 gint px, py, pw, ph;
2237                 pw = gdk_pixbuf_get_width(od->pixbuf);
2238                 ph = gdk_pixbuf_get_height(od->pixbuf);
2239                 px = od->x;
2240                 py = od->y;
2241
2242                 if (od->flags & OVL_RELATIVE)
2243                         {
2244                         if (px < 0) px = rt->pr->viewport_width - pw + px;
2245                         if (py < 0) py = rt->pr->viewport_height - ph + py;
2246                         }
2247
2248                 gdk_cairo_set_source_pixbuf(cr, od->pixbuf, px, py);
2249                 cairo_paint(cr);
2250                 work = work->next;
2251                 }
2252
2253         return FALSE;
2254 }
2255
2256 #else
2257 static gboolean rt_expose_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
2258 {
2259         RendererTiles *rt = (RendererTiles *)data;
2260         if (gtk_widget_is_drawable(widget))
2261                 {
2262                 if (gtk_widget_get_has_window(widget))
2263                         {
2264                         if (event->window != gtk_widget_get_window(widget))
2265                                 {
2266                                 GdkRectangle area;
2267
2268                                 gdk_window_get_position(event->window, &area.x, &area.y);
2269                                 area.x += event->area.x;
2270                                 area.y += event->area.y;
2271                                 area.width = event->area.width;
2272                                 area.height = event->area.height;
2273                                 renderer_redraw(rt, area.x, area.y, area.width, area.height,
2274                                                 FALSE, TILE_RENDER_ALL, FALSE, FALSE);
2275
2276                                 }
2277                         else
2278                                 {
2279                                 renderer_redraw(rt, event->area.x, event->area.y, event->area.width, event->area.height,
2280                                                 FALSE, TILE_RENDER_ALL, FALSE, FALSE);
2281                                 }
2282                         }
2283                 }
2284
2285         return FALSE;
2286 }
2287 #endif
2288
2289
2290 RendererFuncs *renderer_tiles_new(PixbufRenderer *pr)
2291 {
2292         RendererTiles *rt = g_new0(RendererTiles, 1);
2293
2294         rt->pr = pr;
2295
2296         rt->f.area_changed = renderer_area_changed;
2297         rt->f.update_pixbuf = renderer_update_pixbuf;
2298         rt->f.free = renderer_free;
2299         rt->f.update_zoom = renderer_update_zoom;
2300         rt->f.invalidate_region = renderer_invalidate_region;
2301         rt->f.scroll = rt_scroll;
2302         rt->f.update_viewport = renderer_update_viewport;
2303
2304
2305         rt->f.overlay_add = renderer_tiles_overlay_add;
2306         rt->f.overlay_set = renderer_tiles_overlay_set;
2307         rt->f.overlay_get = renderer_tiles_overlay_get;
2308
2309         rt->f.stereo_set = renderer_stereo_set;
2310
2311         rt->tile_width = PR_TILE_SIZE;
2312         rt->tile_height = PR_TILE_SIZE;
2313
2314         rt->tiles = NULL;
2315         rt->tile_cache_size = 0;
2316
2317         rt->tile_cache_max = PR_CACHE_SIZE_DEFAULT;
2318
2319         rt->draw_idle_id = 0;
2320
2321         rt->stereo_mode = 0;
2322         rt->stereo_off_x = 0;
2323         rt->stereo_off_y = 0;
2324
2325 #if GTK_CHECK_VERSION(3, 10, 0)
2326         rt->hidpi_scale = gtk_widget_get_scale_factor(GTK_WIDGET(rt->pr));
2327 #else
2328         rt->hidpi_scale = 1;
2329 #endif
2330
2331         g_signal_connect(G_OBJECT(pr), "hierarchy-changed",
2332                          G_CALLBACK(rt_hierarchy_changed_cb), rt);
2333
2334 #if GTK_CHECK_VERSION(3,0,0)
2335         g_signal_connect(G_OBJECT(pr), "draw",
2336                          G_CALLBACK(rt_draw_cb), rt);
2337         g_signal_connect(G_OBJECT(pr), "realize", G_CALLBACK(rt_realize_cb), rt);
2338         g_signal_connect(G_OBJECT(pr), "size-allocate", G_CALLBACK(rt_size_allocate_cb), rt);
2339 #else
2340         g_signal_connect(G_OBJECT(pr), "expose_event",
2341                          G_CALLBACK(rt_expose_cb), rt);
2342 #endif
2343
2344         return (RendererFuncs *) rt;
2345 }
2346
2347
2348 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */