src/pixbuf-renderer.c

   1 /*
   2  * Copyright (C) 2006 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: John Ellis
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include <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 #include "renderer-clutter.h"
  31
  32 #include "intl.h"
  33 #include "layout.h"
  34
  35 #include <gtk/gtk.h>
  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 /* default min and max zoom */
  63 #define PR_ZOOM_MIN -32.0
  64 #define PR_ZOOM_MAX 32.0
  65
  66 /* distance to drag mouse to disable image flip */
  67 #define PR_DRAG_SCROLL_THRESHHOLD 4
  68
  69 /* increase pan rate when holding down shift */
  70 #define PR_PAN_SHIFT_MULTIPLIER 6
  71
  72 /* scroller config */
  73 #define PR_SCROLLER_UPDATES_PER_SEC 30
  74 #define PR_SCROLLER_DEAD_ZONE 6
  75
  76 /* when scaling image to below this size, use nearest pixel for scaling
  77  * (below about 4, the other scale types become slow generating their conversion tables)
  78  */
  79 #define PR_MIN_SCALE_SIZE 8
  80
  81 enum {
  82         SIGNAL_ZOOM = 0,
  83         SIGNAL_CLICKED,
  84         SIGNAL_SCROLL_NOTIFY,
  85         SIGNAL_RENDER_COMPLETE,
  86         SIGNAL_DRAG,
  87         SIGNAL_UPDATE_PIXEL,
  88         SIGNAL_COUNT
  89 };
  90
  91 enum {
  92         PROP_0,
  93         PROP_ZOOM_MIN,
  94         PROP_ZOOM_MAX,
  95         PROP_ZOOM_QUALITY,
  96         PROP_ZOOM_2PASS,
  97         PROP_ZOOM_EXPAND,
  98         PROP_SCROLL_RESET,
  99         PROP_DELAY_FLIP,
 100         PROP_LOADING,
 101         PROP_COMPLETE,
 102         PROP_CACHE_SIZE_DISPLAY,
 103         PROP_CACHE_SIZE_TILES,
 104         PROP_WINDOW_FIT,
 105         PROP_WINDOW_LIMIT,
 106         PROP_WINDOW_LIMIT_VALUE,
 107         PROP_AUTOFIT_LIMIT,
 108         PROP_AUTOFIT_LIMIT_VALUE
 109 };
 110
 111 typedef enum {
 112         PR_ZOOM_NONE            = 0,
 113         PR_ZOOM_FORCE           = 1 << 0,
 114         PR_ZOOM_NEW             = 1 << 1,
 115         PR_ZOOM_CENTER          = 1 << 2,
 116         PR_ZOOM_INVALIDATE      = 1 << 3,
 117         PR_ZOOM_LAZY            = 1 << 4  /* wait with redraw for pixbuf_renderer_area_changed */
 118 } PrZoomFlags;
 119
 120 static guint signals[SIGNAL_COUNT] = { 0 };
 121 static GtkEventBoxClass *parent_class = NULL;
 122
 123
 124
 125 static void pixbuf_renderer_class_init(PixbufRendererClass *class);
 126 static void pixbuf_renderer_init(PixbufRenderer *pr);
 127 static void pixbuf_renderer_finalize(GObject *object);
 128 static void pixbuf_renderer_set_property(GObject *object, guint prop_id,
 129                                          const GValue *value, GParamSpec *pspec);
 130 static void pixbuf_renderer_get_property(GObject *object, guint prop_id,
 131                                          GValue *value, GParamSpec *pspec);
 132 static void pr_scroller_timer_set(PixbufRenderer *pr, gboolean start);
 133
 134
 135 static void pr_source_tile_free_all(PixbufRenderer *pr);
 136
 137 static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
 138                          PrZoomFlags flags, gint px, gint py);
 139
 140 static void pr_signals_connect(PixbufRenderer *pr);
 141 static void pr_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data);
 142 static void pr_stereo_temp_disable(PixbufRenderer *pr, gboolean disable);
 143
 144
 145 /*
 146  *-------------------------------------------------------------------
 147  * Pixbuf Renderer object
 148  *-------------------------------------------------------------------
 149  */
 150
 151 GType pixbuf_renderer_get_type(void)
 152 {
 153         static GType pixbuf_renderer_type = 0;
 154
 155         if (!pixbuf_renderer_type)
 156                 {
 157                 static const GTypeInfo pixbuf_renderer_info =
 158                         {
 159                         sizeof(PixbufRendererClass), /* class_size */
 160                         NULL,           /* base_init */
 161                         NULL,           /* base_finalize */
 162                         (GClassInitFunc)pixbuf_renderer_class_init,
 163                         NULL,           /* class_finalize */
 164                         NULL,           /* class_data */
 165                         sizeof(PixbufRenderer), /* instance_size */
 166                         0,              /* n_preallocs */
 167                         (GInstanceInitFunc)pixbuf_renderer_init, /* instance_init */
 168                         NULL,           /* value_table */
 169                         };
 170
 171                 pixbuf_renderer_type = g_type_register_static(GTK_TYPE_EVENT_BOX, "PixbufRenderer",
 172                                                               &pixbuf_renderer_info, 0);
 173                 }
 174
 175         return pixbuf_renderer_type;
 176 }
 177
 178 static void pixbuf_renderer_class_init(PixbufRendererClass *class)
 179 {
 180         GObjectClass *gobject_class = G_OBJECT_CLASS(class);
 181
 182         parent_class = g_type_class_peek_parent(class);
 183
 184         gobject_class->set_property = pixbuf_renderer_set_property;
 185         gobject_class->get_property = pixbuf_renderer_get_property;
 186
 187         gobject_class->finalize = pixbuf_renderer_finalize;
 188
 189         g_object_class_install_property(gobject_class,
 190                                         PROP_ZOOM_MIN,
 191                                         g_param_spec_double("zoom_min",
 192                                                             "Zoom minimum",
 193                                                             NULL,
 194                                                             -1000.0,
 195                                                             1000.0,
 196                                                             PR_ZOOM_MIN,
 197                                                             G_PARAM_READABLE | G_PARAM_WRITABLE));
 198
 199         g_object_class_install_property(gobject_class,
 200                                         PROP_ZOOM_MAX,
 201                                         g_param_spec_double("zoom_max",
 202                                                             "Zoom maximum",
 203                                                             NULL,
 204                                                             -1000.0,
 205                                                             1000.0,
 206                                                             PR_ZOOM_MIN,
 207                                                             G_PARAM_READABLE | G_PARAM_WRITABLE));
 208
 209         g_object_class_install_property(gobject_class,
 210                                         PROP_ZOOM_QUALITY,
 211                                         g_param_spec_uint("zoom_quality",
 212                                                           "Zoom quality",
 213                                                           NULL,
 214                                                           GDK_INTERP_NEAREST,
 215                                                           GDK_INTERP_HYPER,
 216                                                           GDK_INTERP_BILINEAR,
 217                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 218
 219         g_object_class_install_property(gobject_class,
 220                                         PROP_ZOOM_2PASS,
 221                                         g_param_spec_boolean("zoom_2pass",
 222                                                              "2 pass zoom",
 223                                                              NULL,
 224                                                              TRUE,
 225                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 226
 227         g_object_class_install_property(gobject_class,
 228                                         PROP_ZOOM_EXPAND,
 229                                         g_param_spec_boolean("zoom_expand",
 230                                                              "Expand image in autozoom.",
 231                                                              NULL,
 232                                                              FALSE,
 233                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 234         g_object_class_install_property(gobject_class,
 235                                         PROP_SCROLL_RESET,
 236                                         g_param_spec_uint("scroll_reset",
 237                                                           "New image scroll reset",
 238                                                           NULL,
 239                                                           PR_SCROLL_RESET_TOPLEFT,
 240                                                           PR_SCROLL_RESET_NOCHANGE,
 241                                                           PR_SCROLL_RESET_TOPLEFT,
 242                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 243
 244         g_object_class_install_property(gobject_class,
 245                                         PROP_DELAY_FLIP,
 246                                         g_param_spec_boolean("delay_flip",
 247                                                              "Delay image update",
 248                                                              NULL,
 249                                                              FALSE,
 250                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 251
 252         g_object_class_install_property(gobject_class,
 253                                         PROP_LOADING,
 254                                         g_param_spec_boolean("loading",
 255                                                              "Image actively loading",
 256                                                              NULL,
 257                                                              FALSE,
 258                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 259
 260         g_object_class_install_property(gobject_class,
 261                                         PROP_COMPLETE,
 262                                         g_param_spec_boolean("complete",
 263                                                              "Image rendering complete",
 264                                                              NULL,
 265                                                              FALSE,
 266                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 267
 268         g_object_class_install_property(gobject_class,
 269                                         PROP_CACHE_SIZE_DISPLAY,
 270                                         g_param_spec_uint("cache_display",
 271                                                           "Display cache size MB",
 272                                                           NULL,
 273                                                           0,
 274                                                           128,
 275                                                           PR_CACHE_SIZE_DEFAULT,
 276                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 277
 278         g_object_class_install_property(gobject_class,
 279                                         PROP_CACHE_SIZE_TILES,
 280                                         g_param_spec_uint("cache_tiles",
 281                                                           "Tile cache count",
 282                                                           "Number of tiles to retain in memory at any one time.",
 283                                                           0,
 284                                                           256,
 285                                                           PR_CACHE_SIZE_DEFAULT,
 286                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 287
 288         g_object_class_install_property(gobject_class,
 289                                         PROP_WINDOW_FIT,
 290                                         g_param_spec_boolean("window_fit",
 291                                                              "Fit window to image size",
 292                                                              NULL,
 293                                                              FALSE,
 294                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 295
 296         g_object_class_install_property(gobject_class,
 297                                         PROP_WINDOW_LIMIT,
 298                                         g_param_spec_boolean("window_limit",
 299                                                              "Limit size of parent window",
 300                                                              NULL,
 301                                                              FALSE,
 302                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 303
 304         g_object_class_install_property(gobject_class,
 305                                         PROP_WINDOW_LIMIT_VALUE,
 306                                         g_param_spec_uint("window_limit_value",
 307                                                           "Size limit of parent window",
 308                                                           NULL,
 309                                                           10,
 310                                                           150,
 311                                                           100,
 312                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 313
 314         g_object_class_install_property(gobject_class,
 315                                         PROP_AUTOFIT_LIMIT,
 316                                         g_param_spec_boolean("autofit_limit",
 317                                                              "Limit size of image when autofitting",
 318                                                              NULL,
 319                                                              FALSE,
 320                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 321
 322         g_object_class_install_property(gobject_class,
 323                                         PROP_AUTOFIT_LIMIT_VALUE,
 324                                         g_param_spec_uint("autofit_limit_value",
 325                                                           "Size limit of image when autofitting",
 326                                                           NULL,
 327                                                           10,
 328                                                           150,
 329                                                           100,
 330                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 331
 332
 333         signals[SIGNAL_ZOOM] =
 334                 g_signal_new("zoom",
 335                              G_OBJECT_CLASS_TYPE(gobject_class),
 336                              G_SIGNAL_RUN_LAST,
 337                              G_STRUCT_OFFSET(PixbufRendererClass, zoom),
 338                              NULL, NULL,
 339                              g_cclosure_marshal_VOID__DOUBLE,
 340                              G_TYPE_NONE, 1,
 341                              G_TYPE_DOUBLE);
 342
 343         signals[SIGNAL_CLICKED] =
 344                 g_signal_new("clicked",
 345                              G_OBJECT_CLASS_TYPE(gobject_class),
 346                              G_SIGNAL_RUN_LAST,
 347                              G_STRUCT_OFFSET(PixbufRendererClass, clicked),
 348                              NULL, NULL,
 349                              g_cclosure_marshal_VOID__BOXED,
 350                              G_TYPE_NONE, 1,
 351                              GDK_TYPE_EVENT);
 352
 353         signals[SIGNAL_SCROLL_NOTIFY] =
 354                 g_signal_new("scroll-notify",
 355                              G_OBJECT_CLASS_TYPE(gobject_class),
 356                              G_SIGNAL_RUN_LAST,
 357                              G_STRUCT_OFFSET(PixbufRendererClass, scroll_notify),
 358                              NULL, NULL,
 359                              g_cclosure_marshal_VOID__VOID,
 360                              G_TYPE_NONE, 0);
 361
 362         signals[SIGNAL_RENDER_COMPLETE] =
 363                 g_signal_new("render-complete",
 364                              G_OBJECT_CLASS_TYPE(gobject_class),
 365                              G_SIGNAL_RUN_LAST,
 366                              G_STRUCT_OFFSET(PixbufRendererClass, render_complete),
 367                              NULL, NULL,
 368                              g_cclosure_marshal_VOID__VOID,
 369                              G_TYPE_NONE, 0);
 370
 371         signals[SIGNAL_DRAG] =
 372                 g_signal_new("drag",
 373                              G_OBJECT_CLASS_TYPE(gobject_class),
 374                              G_SIGNAL_RUN_LAST,
 375                              G_STRUCT_OFFSET(PixbufRendererClass, drag),
 376                              NULL, NULL,
 377                              g_cclosure_marshal_VOID__BOXED,
 378                              G_TYPE_NONE, 1,
 379                              GDK_TYPE_EVENT);
 380
 381         signals[SIGNAL_UPDATE_PIXEL] =
 382                 g_signal_new("update-pixel",
 383                              G_OBJECT_CLASS_TYPE(gobject_class),
 384                              G_SIGNAL_RUN_LAST,
 385                              G_STRUCT_OFFSET(PixbufRendererClass, update_pixel),
 386                              NULL, NULL,
 387                              g_cclosure_marshal_VOID__VOID,
 388                              G_TYPE_NONE, 0);
 389 }
 390
 391 static RendererFuncs *pr_backend_renderer_new(PixbufRenderer *pr)
 392 {
 393         if (options->image.use_clutter_renderer)
 394                 {
 395 #ifdef HAVE_CLUTTER
 396                 return renderer_clutter_new(pr);
 397 #else
 398                 DEBUG_0("Geeqie is built without clutter renderer support");
 399 #endif
 400                 }
 401         return renderer_tiles_new(pr);
 402 }
 403
 404
 405 static void pixbuf_renderer_init(PixbufRenderer *pr)
 406 {
 407         GtkWidget *box;
 408
 409         box = GTK_WIDGET(pr);
 410
 411         pr->zoom_min = PR_ZOOM_MIN;
 412         pr->zoom_max = PR_ZOOM_MAX;
 413         pr->zoom_quality = GDK_INTERP_BILINEAR;
 414         pr->zoom_2pass = FALSE;
 415
 416         pr->zoom = 1.0;
 417         pr->scale = 1.0;
 418         pr->aspect_ratio = 1.0;
 419
 420         pr->scroll_reset = PR_SCROLL_RESET_TOPLEFT;
 421
 422         pr->scroller_id = 0;
 423         pr->scroller_overlay = -1;
 424
 425         pr->x_mouse = -1;
 426         pr->y_mouse = -1;
 427
 428         pr->source_tiles_enabled = FALSE;
 429         pr->source_tiles = NULL;
 430
 431         pr->orientation = 1;
 432
 433         pr->norm_center_x = 0.5;
 434         pr->norm_center_y = 0.5;
 435
 436         pr->stereo_mode = PR_STEREO_NONE;
 437
 438         pr->renderer = pr_backend_renderer_new(pr);
 439
 440         pr->renderer2 = NULL;
 441
 442         gtk_widget_set_double_buffered(box, FALSE);
 443         gtk_widget_set_app_paintable(box, TRUE);
 444         g_signal_connect_after(G_OBJECT(box), "size_allocate",
 445                                G_CALLBACK(pr_size_cb), pr);
 446
 447         pr_signals_connect(pr);
 448 }
 449
 450 static void pixbuf_renderer_finalize(GObject *object)
 451 {
 452         PixbufRenderer *pr;
 453
 454         pr = PIXBUF_RENDERER(object);
 455
 456         pr->renderer->free(pr->renderer);
 457         if (pr->renderer2) pr->renderer2->free(pr->renderer2);
 458
 459
 460         if (pr->pixbuf) g_object_unref(pr->pixbuf);
 461
 462         pr_scroller_timer_set(pr, FALSE);
 463
 464         pr_source_tile_free_all(pr);
 465 }
 466
 467 PixbufRenderer *pixbuf_renderer_new(void)
 468 {
 469         return g_object_new(TYPE_PIXBUF_RENDERER, NULL);
 470 }
 471
 472 static void pixbuf_renderer_set_property(GObject *object, guint prop_id,
 473                                          const GValue *value, GParamSpec *pspec)
 474 {
 475         PixbufRenderer *pr;
 476
 477         pr = PIXBUF_RENDERER(object);
 478
 479         switch (prop_id)
 480                 {
 481                 case PROP_ZOOM_MIN:
 482                         pr->zoom_min = g_value_get_double(value);
 483                         break;
 484                 case PROP_ZOOM_MAX:
 485                         pr->zoom_max = g_value_get_double(value);
 486                         break;
 487                 case PROP_ZOOM_QUALITY:
 488                         pr->zoom_quality = g_value_get_uint(value);
 489                         break;
 490                 case PROP_ZOOM_2PASS:
 491                         pr->zoom_2pass = g_value_get_boolean(value);
 492                         break;
 493                 case PROP_ZOOM_EXPAND:
 494                         pr->zoom_expand = g_value_get_boolean(value);
 495                         break;
 496                 case PROP_SCROLL_RESET:
 497                         pr->scroll_reset = g_value_get_uint(value);
 498                         break;
 499                 case PROP_DELAY_FLIP:
 500                         pr->delay_flip = g_value_get_boolean(value);
 501                         break;
 502                 case PROP_LOADING:
 503                         pr->loading = g_value_get_boolean(value);
 504                         break;
 505                 case PROP_COMPLETE:
 506                         pr->complete = g_value_get_boolean(value);
 507                         break;
 508                 case PROP_CACHE_SIZE_DISPLAY:
 509 //                      pr->tile_cache_max = g_value_get_uint(value);
 510                         break;
 511                 case PROP_CACHE_SIZE_TILES:
 512                         pr->source_tiles_cache_size = g_value_get_uint(value);
 513                         break;
 514                 case PROP_WINDOW_FIT:
 515                         pr->window_fit = g_value_get_boolean(value);
 516                         break;
 517                 case PROP_WINDOW_LIMIT:
 518                         pr->window_limit = g_value_get_boolean(value);
 519                         break;
 520                 case PROP_WINDOW_LIMIT_VALUE:
 521                         pr->window_limit_size = g_value_get_uint(value);
 522                         break;
 523                 case PROP_AUTOFIT_LIMIT:
 524                         pr->autofit_limit = g_value_get_boolean(value);
 525                         break;
 526                 case PROP_AUTOFIT_LIMIT_VALUE:
 527                         pr->autofit_limit_size = g_value_get_uint(value);
 528                         break;
 529                 default:
 530                         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
 531                         break;
 532                 }
 533 }
 534
 535 static void pixbuf_renderer_get_property(GObject *object, guint prop_id,
 536                                          GValue *value, GParamSpec *pspec)
 537 {
 538         PixbufRenderer *pr;
 539
 540         pr = PIXBUF_RENDERER(object);
 541
 542         switch (prop_id)
 543                 {
 544                 case PROP_ZOOM_MIN:
 545                         g_value_set_double(value, pr->zoom_min);
 546                         break;
 547                 case PROP_ZOOM_MAX:
 548                         g_value_set_double(value, pr->zoom_max);
 549                         break;
 550                 case PROP_ZOOM_QUALITY:
 551                         g_value_set_uint(value, pr->zoom_quality);
 552                         break;
 553                 case PROP_ZOOM_2PASS:
 554                         g_value_set_boolean(value, pr->zoom_2pass);
 555                         break;
 556                 case PROP_ZOOM_EXPAND:
 557                         g_value_set_boolean(value, pr->zoom_expand);
 558                         break;
 559                 case PROP_SCROLL_RESET:
 560                         g_value_set_uint(value, pr->scroll_reset);
 561                         break;
 562                 case PROP_DELAY_FLIP:
 563                         g_value_set_boolean(value, pr->delay_flip);
 564                         break;
 565                 case PROP_LOADING:
 566                         g_value_set_boolean(value, pr->loading);
 567                         break;
 568                 case PROP_COMPLETE:
 569                         g_value_set_boolean(value, pr->complete);
 570                         break;
 571                 case PROP_CACHE_SIZE_DISPLAY:
 572 //                      g_value_set_uint(value, pr->tile_cache_max);
 573                         break;
 574                 case PROP_CACHE_SIZE_TILES:
 575                         g_value_set_uint(value, pr->source_tiles_cache_size);
 576                         break;
 577                 case PROP_WINDOW_FIT:
 578                         g_value_set_boolean(value, pr->window_fit);
 579                         break;
 580                 case PROP_WINDOW_LIMIT:
 581                         g_value_set_boolean(value, pr->window_limit);
 582                         break;
 583                 case PROP_WINDOW_LIMIT_VALUE:
 584                         g_value_set_uint(value, pr->window_limit_size);
 585                         break;
 586                 case PROP_AUTOFIT_LIMIT:
 587                         g_value_set_boolean(value, pr->autofit_limit);
 588                         break;
 589                 case PROP_AUTOFIT_LIMIT_VALUE:
 590                         g_value_set_uint(value, pr->autofit_limit_size);
 591                         break;
 592                 default:
 593                         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
 594                         break;
 595                 }
 596 }
 597
 598
 599 /*
 600  *-------------------------------------------------------------------
 601  * misc utilities
 602  *-------------------------------------------------------------------
 603  */
 604
 605 static void widget_set_cursor(GtkWidget *widget, gint icon)
 606 {
 607         GdkCursor *cursor;
 608
 609         if (!gtk_widget_get_window(widget)) return;
 610
 611         if (icon == -1)
 612                 {
 613                 cursor = NULL;
 614                 }
 615         else
 616                 {
 617                 cursor = gdk_cursor_new(icon);
 618                 }
 619
 620         gdk_window_set_cursor(gtk_widget_get_window(widget), cursor);
 621
 622         if (cursor) gdk_cursor_unref(cursor);
 623 }
 624
 625 gboolean pr_clip_region(gint x, gint y, gint w, gint h,
 626                                gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 627                                gint *rx, gint *ry, gint *rw, gint *rh)
 628 {
 629         if (clip_x + clip_w <= x ||
 630             clip_x >= x + w ||
 631             clip_y + clip_h <= y ||
 632             clip_y >= y + h)
 633                 {
 634                 return FALSE;
 635                 }
 636
 637         *rx = MAX(x, clip_x);
 638         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 639
 640         *ry = MAX(y, clip_y);
 641         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 642
 643         return TRUE;
 644 }
 645
 646 static gboolean pr_parent_window_sizable(PixbufRenderer *pr)
 647 {
 648         GdkWindowState state;
 649
 650         if (!pr->parent_window) return FALSE;
 651         if (!pr->window_fit) return FALSE;
 652         if (!gtk_widget_get_window(GTK_WIDGET(pr))) return FALSE;
 653
 654         if (!gtk_widget_get_window(pr->parent_window)) return FALSE;
 655         state = gdk_window_get_state(gtk_widget_get_window(pr->parent_window));
 656         if (state & GDK_WINDOW_STATE_MAXIMIZED) return FALSE;
 657
 658         return TRUE;
 659 }
 660
 661 static gboolean pr_parent_window_resize(PixbufRenderer *pr, gint w, gint h)
 662 {
 663         GtkWidget *widget;
 664         GtkWidget *parent;
 665         gint ww, wh;
 666         GtkAllocation widget_allocation;
 667         GtkAllocation parent_allocation;
 668
 669         if (!pr_parent_window_sizable(pr)) return FALSE;
 670
 671         if (pr->window_limit)
 672                 {
 673                 gint sw = gdk_screen_width() * pr->window_limit_size / 100;
 674                 gint sh = gdk_screen_height() * pr->window_limit_size / 100;
 675
 676                 if (w > sw) w = sw;
 677                 if (h > sh) h = sh;
 678                 }
 679
 680         widget = GTK_WIDGET(pr);
 681         parent = GTK_WIDGET(pr->parent_window);
 682
 683         gtk_widget_get_allocation(widget, &widget_allocation);
 684         gtk_widget_get_allocation(parent, &parent_allocation);
 685
 686         w += (parent_allocation.width - widget_allocation.width);
 687         h += (parent_allocation.height - widget_allocation.height);
 688
 689         ww = gdk_window_get_width(gtk_widget_get_window(parent));
 690         wh = gdk_window_get_height(gtk_widget_get_window(parent));
 691         if (w == ww && h == wh) return FALSE;
 692
 693         gdk_window_resize(gtk_widget_get_window(parent), w, h);
 694
 695         return TRUE;
 696 }
 697
 698 void pixbuf_renderer_set_parent(PixbufRenderer *pr, GtkWindow *window)
 699 {
 700         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
 701         g_return_if_fail(window == NULL || GTK_IS_WINDOW(window));
 702
 703         pr->parent_window = GTK_WIDGET(window);
 704 }
 705
 706 GtkWindow *pixbuf_renderer_get_parent(PixbufRenderer *pr)
 707 {
 708         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), NULL);
 709
 710         return GTK_WINDOW(pr->parent_window);
 711 }
 712
 713
 714 /*
 715  *-------------------------------------------------------------------
 716  * overlays
 717  *-------------------------------------------------------------------
 718  */
 719
 720
 721 gint pixbuf_renderer_overlay_add(PixbufRenderer *pr, GdkPixbuf *pixbuf, gint x, gint y,
 722                                  OverlayRendererFlags flags)
 723 {
 724         /* let's assume both renderers returns the same value */
 725         if (pr->renderer2) pr->renderer2->overlay_add(pr->renderer2, pixbuf, x, y, flags);
 726         return pr->renderer->overlay_add(pr->renderer, pixbuf, x, y, flags);
 727 }
 728
 729 void pixbuf_renderer_overlay_set(PixbufRenderer *pr, gint id, GdkPixbuf *pixbuf, gint x, gint y)
 730 {
 731         pr->renderer->overlay_set(pr->renderer, id, pixbuf, x, y);
 732         if (pr->renderer2) pr->renderer2->overlay_set(pr->renderer2, id, pixbuf, x, y);
 733 }
 734
 735 gboolean pixbuf_renderer_overlay_get(PixbufRenderer *pr, gint id, GdkPixbuf **pixbuf, gint *x, gint *y)
 736 {
 737         if (pr->renderer2) pr->renderer2->overlay_get(pr->renderer2, id, pixbuf, x, y);
 738         return pr->renderer->overlay_get(pr->renderer, id, pixbuf, x, y);
 739 }
 740
 741 void pixbuf_renderer_overlay_remove(PixbufRenderer *pr, gint id)
 742 {
 743         pr->renderer->overlay_set(pr->renderer, id, NULL, 0, 0);
 744         if (pr->renderer2) pr->renderer2->overlay_set(pr->renderer2, id, NULL, 0, 0);
 745 }
 746
 747 /*
 748  *-------------------------------------------------------------------
 749  * scroller overlay
 750  *-------------------------------------------------------------------
 751  */
 752
 753
 754 static gboolean pr_scroller_update_cb(gpointer data)
 755 {
 756         PixbufRenderer *pr = data;
 757         gint x, y;
 758         gint xinc, yinc;
 759
 760         /* this was a simple scroll by difference between scroller and mouse position,
 761          * but all this math results in a smoother result and accounts for a dead zone.
 762          */
 763
 764         if (abs(pr->scroller_xpos - pr->scroller_x) < PR_SCROLLER_DEAD_ZONE)
 765                 {
 766                 x = 0;
 767                 }
 768         else
 769                 {
 770                 gint shift = PR_SCROLLER_DEAD_ZONE / 2 * PR_SCROLLER_UPDATES_PER_SEC;
 771                 x = (pr->scroller_xpos - pr->scroller_x) / 2 * PR_SCROLLER_UPDATES_PER_SEC;
 772                 x += (x > 0) ? -shift : shift;
 773                 }
 774
 775         if (abs(pr->scroller_ypos - pr->scroller_y) < PR_SCROLLER_DEAD_ZONE)
 776                 {
 777                 y = 0;
 778                 }
 779         else
 780                 {
 781                 gint shift = PR_SCROLLER_DEAD_ZONE / 2 * PR_SCROLLER_UPDATES_PER_SEC;
 782                 y = (pr->scroller_ypos - pr->scroller_y) / 2 * PR_SCROLLER_UPDATES_PER_SEC;
 783                 y += (y > 0) ? -shift : shift;
 784                 }
 785
 786         if (abs(x) < PR_SCROLLER_DEAD_ZONE * PR_SCROLLER_UPDATES_PER_SEC)
 787                 {
 788                 xinc = x;
 789                 }
 790         else
 791                 {
 792                 xinc = pr->scroller_xinc;
 793
 794                 if (x >= 0)
 795                         {
 796                         if (xinc < 0) xinc = 0;
 797                         if (x < xinc) xinc = x;
 798                         if (x > xinc) xinc = MIN(xinc + x / PR_SCROLLER_UPDATES_PER_SEC, x);
 799                         }
 800                 else
 801                         {
 802                         if (xinc > 0) xinc = 0;
 803                         if (x > xinc) xinc = x;
 804                         if (x < xinc) xinc = MAX(xinc + x / PR_SCROLLER_UPDATES_PER_SEC, x);
 805                         }
 806                 }
 807
 808         if (abs(y) < PR_SCROLLER_DEAD_ZONE * PR_SCROLLER_UPDATES_PER_SEC)
 809                 {
 810                 yinc = y;
 811                 }
 812         else
 813                 {
 814                 yinc = pr->scroller_yinc;
 815
 816                 if (y >= 0)
 817                         {
 818                         if (yinc < 0) yinc = 0;
 819                         if (y < yinc) yinc = y;
 820                         if (y > yinc) yinc = MIN(yinc + y / PR_SCROLLER_UPDATES_PER_SEC, y);
 821                         }
 822                 else
 823                         {
 824                         if (yinc > 0) yinc = 0;
 825                         if (y > yinc) yinc = y;
 826                         if (y < yinc) yinc = MAX(yinc + y / PR_SCROLLER_UPDATES_PER_SEC, y);
 827                         }
 828                 }
 829
 830         pr->scroller_xinc = xinc;
 831         pr->scroller_yinc = yinc;
 832
 833         xinc = xinc / PR_SCROLLER_UPDATES_PER_SEC;
 834         yinc = yinc / PR_SCROLLER_UPDATES_PER_SEC;
 835
 836         pixbuf_renderer_scroll(pr, xinc, yinc);
 837
 838         return TRUE;
 839 }
 840
 841 static void pr_scroller_timer_set(PixbufRenderer *pr, gboolean start)
 842 {
 843         if (pr->scroller_id)
 844                 {
 845                 g_source_remove(pr->scroller_id);
 846                 pr->scroller_id = 0;
 847                 }
 848
 849         if (start)
 850                 {
 851                 pr->scroller_id = g_timeout_add(1000 / PR_SCROLLER_UPDATES_PER_SEC,
 852                                                 pr_scroller_update_cb, pr);
 853                 }
 854 }
 855
 856 static void pr_scroller_start(PixbufRenderer *pr, gint x, gint y)
 857 {
 858         if (pr->scroller_overlay == -1)
 859                 {
 860                 GdkPixbuf *pixbuf;
 861                 gint w, h;
 862
 863 #ifdef GQ_BUILD
 864                 pixbuf = pixbuf_inline(PIXBUF_INLINE_SCROLLER);
 865 #else
 866                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, 32, 32);
 867                 gdk_pixbuf_fill(pixbuf, 0x000000ff);
 868 #endif
 869                 w = gdk_pixbuf_get_width(pixbuf);
 870                 h = gdk_pixbuf_get_height(pixbuf);
 871
 872                 pr->scroller_overlay = pixbuf_renderer_overlay_add(pr, pixbuf, x - w / 2, y - h / 2, OVL_NORMAL);
 873                 g_object_unref(pixbuf);
 874                 }
 875
 876         pr->scroller_x = x;
 877         pr->scroller_y = y;
 878         pr->scroller_xpos = x;
 879         pr->scroller_ypos = y;
 880
 881         pr_scroller_timer_set(pr, TRUE);
 882 }
 883
 884 static void pr_scroller_stop(PixbufRenderer *pr)
 885 {
 886         if (!pr->scroller_id) return;
 887
 888         pixbuf_renderer_overlay_remove(pr, pr->scroller_overlay);
 889         pr->scroller_overlay = -1;
 890
 891         pr_scroller_timer_set(pr, FALSE);
 892 }
 893
 894 /*
 895  *-------------------------------------------------------------------
 896  * borders
 897  *-------------------------------------------------------------------
 898  */
 899
 900 void pixbuf_renderer_set_color(PixbufRenderer *pr, GdkColor *color)
 901 {
 902         GtkStyle *style;
 903         GtkWidget *widget;
 904
 905         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
 906
 907         widget = GTK_WIDGET(pr);
 908
 909         if (color) {
 910                 GdkColor *slot;
 911
 912                 style = gtk_style_copy(gtk_widget_get_style(widget));
 913                 slot = &style->bg[GTK_STATE_NORMAL];
 914
 915                 slot->red = color->red;
 916                 slot->green = color->green;
 917                 slot->blue = color->blue;
 918                 }
 919         else {
 920                 style = gtk_style_copy(gtk_widget_get_default_style());
 921         }
 922
 923         gtk_widget_set_style(widget, style);
 924
 925         pr->renderer->update_viewport(pr->renderer);
 926         if (pr->renderer2) pr->renderer2->update_viewport(pr->renderer2);
 927 }
 928
 929 /*
 930  *-------------------------------------------------------------------
 931  * source tiles
 932  *-------------------------------------------------------------------
 933  */
 934
 935 static void pr_source_tile_free(SourceTile *st)
 936 {
 937         if (!st) return;
 938
 939         if (st->pixbuf) g_object_unref(st->pixbuf);
 940         g_free(st);
 941 }
 942
 943 static void pr_source_tile_free_all(PixbufRenderer *pr)
 944 {
 945         GList *work;
 946
 947         work = pr->source_tiles;
 948         while (work)
 949                 {
 950                 SourceTile *st;
 951
 952                 st = work->data;
 953                 work = work->next;
 954
 955                 pr_source_tile_free(st);
 956                 }
 957
 958         g_list_free(pr->source_tiles);
 959         pr->source_tiles = NULL;
 960 }
 961
 962 static void pr_source_tile_unset(PixbufRenderer *pr)
 963 {
 964         pr_source_tile_free_all(pr);
 965         pr->source_tiles_enabled = FALSE;
 966 }
 967
 968 static gboolean pr_source_tile_visible(PixbufRenderer *pr, SourceTile *st)
 969 {
 970         gint x1, y1, x2, y2;
 971
 972         if (!st) return FALSE;
 973
 974 //      x1 = ROUND_DOWN(pr->x_scroll, pr->tile_width);
 975 //      y1 = ROUND_DOWN(pr->y_scroll, pr->tile_height);
 976 //      x2 = ROUND_UP(pr->x_scroll + pr->vis_width, pr->tile_width);
 977 //      y2 = ROUND_UP(pr->y_scroll + pr->vis_height, pr->tile_height);
 978         x1 = pr->x_scroll;
 979         y1 = pr->y_scroll;
 980         x2 = pr->x_scroll + pr->vis_width;
 981         y2 = pr->y_scroll + pr->vis_height;
 982
 983         return !((gdouble)st->x * pr->scale > (gdouble)x2 ||
 984                  (gdouble)(st->x + pr->source_tile_width) * pr->scale < (gdouble)x1 ||
 985                  (gdouble)st->y * pr->scale > (gdouble)y2 ||
 986                  (gdouble)(st->y + pr->source_tile_height) * pr->scale < (gdouble)y1);
 987 }
 988
 989 static SourceTile *pr_source_tile_new(PixbufRenderer *pr, gint x, gint y)
 990 {
 991         SourceTile *st = NULL;
 992         gint count;
 993
 994         g_return_val_if_fail(pr->source_tile_width >= 1 && pr->source_tile_height >= 1, NULL);
 995
 996         if (pr->source_tiles_cache_size < 4) pr->source_tiles_cache_size = 4;
 997
 998         count = g_list_length(pr->source_tiles);
 999         if (count >= pr->source_tiles_cache_size)
1000                 {
1001                 GList *work;
1002
1003                 work = g_list_last(pr->source_tiles);
1004                 while (work && count >= pr->source_tiles_cache_size)
1005                         {
1006                         SourceTile *needle;
1007
1008                         needle = work->data;
1009                         work = work->prev;
1010
1011                         if (!pr_source_tile_visible(pr, needle))
1012                                 {
1013                                 pr->source_tiles = g_list_remove(pr->source_tiles, needle);
1014
1015                                 if (pr->func_tile_dispose)
1016                                         {
1017                                         pr->func_tile_dispose(pr, needle->x, needle->y,
1018                                                               pr->source_tile_width, pr->source_tile_height,
1019                                                               needle->pixbuf, pr->func_tile_data);
1020                                         }
1021
1022                                 if (!st)
1023                                         {
1024                                         st = needle;
1025                                         }
1026                                 else
1027                                         {
1028                                         pr_source_tile_free(needle);
1029                                         }
1030
1031                                 count--;
1032                                 }
1033                         }
1034                 }
1035
1036         if (!st)
1037                 {
1038                 st = g_new0(SourceTile, 1);
1039                 st->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8,
1040                                             pr->source_tile_width, pr->source_tile_height);
1041                 }
1042
1043         st->x = ROUND_DOWN(x, pr->source_tile_width);
1044         st->y = ROUND_DOWN(y, pr->source_tile_height);
1045         st->blank = TRUE;
1046
1047         pr->source_tiles = g_list_prepend(pr->source_tiles, st);
1048
1049         return st;
1050 }
1051
1052 static SourceTile *pr_source_tile_request(PixbufRenderer *pr, gint x, gint y)
1053 {
1054         SourceTile *st;
1055
1056         st = pr_source_tile_new(pr, x, y);
1057         if (!st) return NULL;
1058
1059         if (pr->func_tile_request &&
1060             pr->func_tile_request(pr, st->x, st->y,
1061                                    pr->source_tile_width, pr->source_tile_height, st->pixbuf, pr->func_tile_data))
1062                 {
1063                 st->blank = FALSE;
1064                 }
1065
1066         pr->renderer->invalidate_region(pr->renderer, st->x * pr->scale, st->y * pr->scale,
1067                                   pr->source_tile_width * pr->scale, pr->source_tile_height * pr->scale);
1068         if (pr->renderer2) pr->renderer2->invalidate_region(pr->renderer2, st->x * pr->scale, st->y * pr->scale,
1069                                   pr->source_tile_width * pr->scale, pr->source_tile_height * pr->scale);
1070         return st;
1071 }
1072
1073 static SourceTile *pr_source_tile_find(PixbufRenderer *pr, gint x, gint y)
1074 {
1075         GList *work;
1076
1077         work = pr->source_tiles;
1078         while (work)
1079                 {
1080                 SourceTile *st = work->data;
1081
1082                 if (x >= st->x && x < st->x + pr->source_tile_width &&
1083                     y >= st->y && y < st->y + pr->source_tile_height)
1084                         {
1085                         if (work != pr->source_tiles)
1086                                 {
1087                                 pr->source_tiles = g_list_remove_link(pr->source_tiles, work);
1088                                 pr->source_tiles = g_list_concat(work, pr->source_tiles);
1089                                 }
1090                         return st;
1091                         }
1092
1093                 work = work->next;
1094                 }
1095
1096         return NULL;
1097 }
1098
1099 GList *pr_source_tile_compute_region(PixbufRenderer *pr, gint x, gint y, gint w, gint h, gboolean request)
1100 {
1101         gint x1, y1;
1102         GList *list = NULL;
1103         gint sx, sy;
1104
1105         if (x < 0) x = 0;
1106         if (y < 0) y = 0;
1107         if (w > pr->image_width) w = pr->image_width;
1108         if (h > pr->image_height) h = pr->image_height;
1109
1110         sx = ROUND_DOWN(x, pr->source_tile_width);
1111         sy = ROUND_DOWN(y, pr->source_tile_height);
1112
1113         for (x1 = sx; x1 < x + w; x1+= pr->source_tile_width)
1114                 {
1115                 for (y1 = sy; y1 < y + h; y1 += pr->source_tile_height)
1116                         {
1117                         SourceTile *st;
1118
1119                         st = pr_source_tile_find(pr, x1, y1);
1120                         if (!st && request) st = pr_source_tile_request(pr, x1, y1);
1121
1122                         if (st) list = g_list_prepend(list, st);
1123                         }
1124                 }
1125
1126         return g_list_reverse(list);
1127 }
1128
1129 static void pr_source_tile_changed(PixbufRenderer *pr, gint x, gint y, gint width, gint height)
1130 {
1131         GList *work;
1132
1133         if (width < 1 || height < 1) return;
1134
1135         work = pr->source_tiles;
1136         while (work)
1137                 {
1138                 SourceTile *st;
1139                 gint rx, ry, rw, rh;
1140
1141                 st = work->data;
1142                 work = work->next;
1143
1144                 if (pr_clip_region(st->x, st->y, pr->source_tile_width, pr->source_tile_height,
1145                                    x, y, width, height,
1146                                    &rx, &ry, &rw, &rh))
1147                         {
1148                         GdkPixbuf *pixbuf;
1149
1150                         pixbuf = gdk_pixbuf_new_subpixbuf(st->pixbuf, rx - st->x, ry - st->y, rw, rh);
1151                         if (pr->func_tile_request &&
1152                             pr->func_tile_request(pr, rx, ry, rw, rh, pixbuf, pr->func_tile_data))
1153                                 {
1154                                         pr->renderer->invalidate_region(pr->renderer, rx * pr->scale, ry * pr->scale,
1155                                                               rw * pr->scale, rh * pr->scale);
1156                                         if (pr->renderer2) pr->renderer2->invalidate_region(pr->renderer2, rx * pr->scale, ry * pr->scale,
1157                                                                 rw * pr->scale, rh * pr->scale);
1158                                 }
1159                         g_object_unref(pixbuf);
1160                         }
1161                 }
1162 }
1163
1164 void pixbuf_renderer_set_tiles(PixbufRenderer *pr, gint width, gint height,
1165                                gint tile_width, gint tile_height, gint cache_size,
1166                                PixbufRendererTileRequestFunc func_request,
1167                                PixbufRendererTileDisposeFunc func_dispose,
1168                                gpointer user_data,
1169                                gdouble zoom)
1170 {
1171         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
1172         g_return_if_fail(tile_width >= 32 && tile_height >= 32);
1173         g_return_if_fail(width >= 32 && height > 32);
1174         g_return_if_fail(func_request != NULL);
1175
1176         if (pr->pixbuf) g_object_unref(pr->pixbuf);
1177         pr->pixbuf = NULL;
1178
1179         pr_source_tile_unset(pr);
1180
1181         if (cache_size < 4) cache_size = 4;
1182
1183         pr->source_tiles_enabled = TRUE;
1184         pr->source_tiles_cache_size = cache_size;
1185         pr->source_tile_width = tile_width;
1186         pr->source_tile_height = tile_height;
1187
1188         pr->image_width = width;
1189         pr->image_height = height;
1190
1191         pr->func_tile_request = func_request;
1192         pr->func_tile_dispose = func_dispose;
1193         pr->func_tile_data = user_data;
1194
1195         pr_stereo_temp_disable(pr, TRUE);
1196         pr_zoom_sync(pr, zoom, PR_ZOOM_FORCE | PR_ZOOM_NEW, 0, 0);
1197 }
1198
1199 void pixbuf_renderer_set_tiles_size(PixbufRenderer *pr, gint width, gint height)
1200 {
1201         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
1202         g_return_if_fail(width >= 32 && height > 32);
1203
1204         if (!pr->source_tiles_enabled) return;
1205         if (pr->image_width == width && pr->image_height == height) return;
1206
1207         pr->image_width = width;
1208         pr->image_height = height;
1209
1210         pr_zoom_sync(pr, pr->zoom, PR_ZOOM_FORCE, 0, 0);
1211 }
1212
1213 gint pixbuf_renderer_get_tiles(PixbufRenderer *pr)
1214 {
1215         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
1216
1217         return pr->source_tiles_enabled;
1218 }
1219
1220 static void pr_zoom_adjust_real(PixbufRenderer *pr, gdouble increment,
1221                                 PrZoomFlags flags, gint x, gint y)
1222 {
1223         gdouble zoom = pr->zoom;
1224
1225         if (increment == 0.0) return;
1226
1227         if (zoom == 0.0)
1228                 {
1229                 if (pr->scale < 1.0)
1230                         {
1231                         zoom = 0.0 - 1.0 / pr->scale;
1232                         }
1233                 else
1234                         {
1235                         zoom = pr->scale;
1236                         }
1237                 }
1238
1239         if (increment < 0.0)
1240                 {
1241                 if (zoom >= 1.0 && zoom + increment < 1.0)
1242                         {
1243                         zoom = zoom + increment - 2.0;
1244                         }
1245                 else
1246                         {
1247                         zoom = zoom + increment;
1248                         }
1249                 }
1250         else
1251                 {
1252                 if (zoom <= -1.0 && zoom + increment > -1.0)
1253                         {
1254                         zoom = zoom + increment + 2.0;
1255                         }
1256                 else
1257                         {
1258                         zoom = zoom + increment;
1259                         }
1260                 }
1261
1262         pr_zoom_sync(pr, zoom, flags, x, y);
1263 }
1264
1265
1266 /*
1267  *-------------------------------------------------------------------
1268  * signal emission
1269  *-------------------------------------------------------------------
1270  */
1271
1272 static void pr_update_signal(PixbufRenderer *pr)
1273 {
1274         DEBUG_1("%s pixbuf renderer updated - started drawing %p, img: %dx%d", get_exec_time(), pr, pr->image_width, pr->image_height);
1275         pr->debug_updated = TRUE;
1276 }
1277
1278 static void pr_zoom_signal(PixbufRenderer *pr)
1279 {
1280         g_signal_emit(pr, signals[SIGNAL_ZOOM], 0, pr->zoom);
1281 }
1282
1283 static void pr_clicked_signal(PixbufRenderer *pr, GdkEventButton *bevent)
1284 {
1285         g_signal_emit(pr, signals[SIGNAL_CLICKED], 0, bevent);
1286 }
1287
1288 static void pr_scroll_notify_signal(PixbufRenderer *pr)
1289 {
1290         g_signal_emit(pr, signals[SIGNAL_SCROLL_NOTIFY], 0);
1291 }
1292
1293 void pr_render_complete_signal(PixbufRenderer *pr)
1294 {
1295         if (!pr->complete)
1296                 {
1297                 g_signal_emit(pr, signals[SIGNAL_RENDER_COMPLETE], 0);
1298                 g_object_set(G_OBJECT(pr), "complete", TRUE, NULL);
1299                 }
1300         if (pr->debug_updated)
1301                 {
1302                 DEBUG_1("%s pixbuf renderer done %p", get_exec_time(), pr);
1303                 pr->debug_updated = FALSE;
1304                 }
1305 }
1306
1307 static void pr_drag_signal(PixbufRenderer *pr, GdkEventButton *bevent)
1308 {
1309         g_signal_emit(pr, signals[SIGNAL_DRAG], 0, bevent);
1310 }
1311
1312 static void pr_update_pixel_signal(PixbufRenderer *pr)
1313 {
1314         g_signal_emit(pr, signals[SIGNAL_UPDATE_PIXEL], 0);
1315 }
1316
1317 /*
1318  *-------------------------------------------------------------------
1319  * sync and clamp
1320  *-------------------------------------------------------------------
1321  */
1322
1323
1324 void pr_tile_coords_map_orientation(gint orientation,
1325                                      gdouble tile_x, gdouble tile_y, /* coordinates of the tile */
1326                                      gdouble image_w, gdouble image_h,
1327                                      gdouble tile_w, gdouble tile_h,
1328                                      gdouble *res_x, gdouble *res_y)
1329 {
1330         *res_x = tile_x;
1331         *res_y = tile_y;
1332         switch (orientation)
1333                 {
1334                 case EXIF_ORIENTATION_TOP_LEFT:
1335                         /* normal -- nothing to do */
1336                         break;
1337                 case EXIF_ORIENTATION_TOP_RIGHT:
1338                         /* mirrored */
1339                         *res_x = image_w - tile_x - tile_w;
1340                         break;
1341                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
1342                         /* upside down */
1343                         *res_x = image_w - tile_x - tile_w;
1344                         *res_y = image_h - tile_y - tile_h;
1345                         break;
1346                 case EXIF_ORIENTATION_BOTTOM_LEFT:
1347                         /* flipped */
1348                         *res_y = image_h - tile_y - tile_h;
1349                         break;
1350                 case EXIF_ORIENTATION_LEFT_TOP:
1351                         *res_x = tile_y;
1352                         *res_y = tile_x;
1353                         break;
1354                 case EXIF_ORIENTATION_RIGHT_TOP:
1355                         /* rotated -90 (270) */
1356                         *res_x = tile_y;
1357                         *res_y = image_w - tile_x - tile_w;
1358                         break;
1359                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
1360                         *res_x = image_h - tile_y - tile_h;
1361                         *res_y = image_w - tile_x - tile_w;
1362                         break;
1363                 case EXIF_ORIENTATION_LEFT_BOTTOM:
1364                         /* rotated 90 */
1365                         *res_x = image_h - tile_y - tile_h;
1366                         *res_y = tile_x;
1367                         break;
1368                 default:
1369                         /* The other values are out of range */
1370                         break;
1371                 }
1372 //      log_printf("tile coord y:%f, ih:%d, th:%f ry:%f\n", tile_y, image_h, tile_h, *res_x);
1373 }
1374
1375 void pr_tile_region_map_orientation(gint orientation,
1376                                      gint area_x, gint area_y, /* coordinates of the area inside tile */
1377                                      gint tile_w, gint tile_h,
1378                                      gint area_w, gint area_h,
1379                                      gint *res_x, gint *res_y,
1380                                      gint *res_w, gint *res_h)
1381 {
1382         *res_x = area_x;
1383         *res_y = area_y;
1384         *res_w = area_w;
1385         *res_h = area_h;
1386
1387         switch (orientation)
1388                 {
1389                 case EXIF_ORIENTATION_TOP_LEFT:
1390                         /* normal -- nothing to do */
1391                         break;
1392                 case EXIF_ORIENTATION_TOP_RIGHT:
1393                         /* mirrored */
1394                         *res_x = tile_w - area_x - area_w;
1395                         break;
1396                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
1397                         /* upside down */
1398                         *res_x = tile_w - area_x - area_w;
1399                         *res_y = tile_h - area_y - area_h;
1400                         break;
1401                 case EXIF_ORIENTATION_BOTTOM_LEFT:
1402                         /* flipped */
1403                         *res_y = tile_h - area_y - area_h;
1404                         break;
1405                 case EXIF_ORIENTATION_LEFT_TOP:
1406                         *res_x = area_y;
1407                         *res_y = area_x;
1408                         *res_w = area_h;
1409                         *res_h = area_w;
1410                         break;
1411                 case EXIF_ORIENTATION_RIGHT_TOP:
1412                         /* rotated -90 (270) */
1413                         *res_x = area_y;
1414                         *res_y = tile_w - area_x - area_w;
1415                         *res_w = area_h;
1416                         *res_h = area_w;
1417                         break;
1418                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
1419                         *res_x = tile_h - area_y - area_h;
1420                         *res_y = tile_w - area_x - area_w;
1421                         *res_w = area_h;
1422                         *res_h = area_w;
1423                         break;
1424                 case EXIF_ORIENTATION_LEFT_BOTTOM:
1425                         /* rotated 90 */
1426                         *res_x = tile_h - area_y - area_h;
1427                         *res_y = area_x;
1428                         *res_w = area_h;
1429                         *res_h = area_w;
1430                         break;
1431                 default:
1432                         /* The other values are out of range */
1433                         break;
1434                 }
1435 //      log_printf("inside y:%d, th:%d, ah:%d ry:%d\n", area_y, tile_h, area_h, *res_x);
1436 }
1437
1438 void pr_coords_map_orientation_reverse(gint orientation,
1439                                      gint area_x, gint area_y,
1440                                      gint tile_w, gint tile_h,
1441                                      gint area_w, gint area_h,
1442                                      gint *res_x, gint *res_y,
1443                                      gint *res_w, gint *res_h)
1444 {
1445         *res_x = area_x;
1446         *res_y = area_y;
1447         *res_w = area_w;
1448         *res_h = area_h;
1449
1450         switch (orientation)
1451                 {
1452                 case EXIF_ORIENTATION_TOP_LEFT:
1453                         /* normal -- nothing to do */
1454                         break;
1455                 case EXIF_ORIENTATION_TOP_RIGHT:
1456                         /* mirrored */
1457                         *res_x = tile_w - area_x - area_w;
1458                         break;
1459                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
1460                         /* upside down */
1461                         *res_x = tile_w - area_x - area_w;
1462                         *res_y = tile_h - area_y - area_h;
1463                         break;
1464                 case EXIF_ORIENTATION_BOTTOM_LEFT:
1465                         /* flipped */
1466                         *res_y = tile_h - area_y - area_h;
1467                         break;
1468                 case EXIF_ORIENTATION_LEFT_TOP:
1469                         *res_x = area_y;
1470                         *res_y = area_x;
1471                         *res_w = area_h;
1472                         *res_h = area_w;
1473                         break;
1474                 case EXIF_ORIENTATION_RIGHT_TOP:
1475                         /* rotated -90 (270) */
1476                         *res_x = tile_w - area_y - area_h;
1477                         *res_y = area_x;
1478                         *res_w = area_h;
1479                         *res_h = area_w;
1480                         break;
1481                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
1482                         *res_x = tile_w - area_y - area_h;
1483                         *res_y = tile_h - area_x - area_w;
1484                         *res_w = area_h;
1485                         *res_h = area_w;
1486                         break;
1487                 case EXIF_ORIENTATION_LEFT_BOTTOM:
1488                         /* rotated 90 */
1489                         *res_x = area_y;
1490                         *res_y = tile_h - area_x - area_w;
1491                         *res_w = area_h;
1492                         *res_h = area_w;
1493                         break;
1494                 default:
1495                         /* The other values are out of range */
1496                         break;
1497                 }
1498 }
1499
1500
1501
1502 static void pixbuf_renderer_sync_scroll_center(PixbufRenderer *pr)
1503 {
1504         gint src_x, src_y;
1505         if (!pr->width || !pr->height) return;
1506
1507         /*
1508          * Update norm_center only if the image is bigger than the window.
1509          * With this condition the stored center survives also a temporary display
1510          * of the "broken image" icon.
1511         */
1512
1513         if (pr->width > pr->viewport_width)
1514                 {
1515                 src_x = pr->x_scroll + pr->vis_width / 2;
1516                 pr->norm_center_x = (gdouble)src_x / pr->width;
1517                 }
1518
1519         if (pr->height > pr->viewport_height)
1520                 {
1521                 src_y = pr->y_scroll + pr->vis_height / 2;
1522                 pr->norm_center_y = (gdouble)src_y / pr->height;
1523                 }
1524 }
1525
1526
1527 static gboolean pr_scroll_clamp(PixbufRenderer *pr)
1528 {
1529         gint old_xs;
1530         gint old_ys;
1531
1532         if (pr->zoom == 0.0)
1533                 {
1534                 pr->x_scroll = 0;
1535                 pr->y_scroll = 0;
1536
1537                 return FALSE;
1538                 }
1539
1540         old_xs = pr->x_scroll;
1541         old_ys = pr->y_scroll;
1542
1543         if (pr->x_offset > 0)
1544                 {
1545                 pr->x_scroll = 0;
1546                 }
1547         else
1548                 {
1549                 pr->x_scroll = CLAMP(pr->x_scroll, 0, pr->width - pr->vis_width);
1550                 }
1551
1552         if (pr->y_offset > 0)
1553                 {
1554                 pr->y_scroll = 0;
1555                 }
1556         else
1557                 {
1558                 pr->y_scroll = CLAMP(pr->y_scroll, 0, pr->height - pr->vis_height);
1559                 }
1560
1561         pixbuf_renderer_sync_scroll_center(pr);
1562
1563         return (old_xs != pr->x_scroll || old_ys != pr->y_scroll);
1564 }
1565
1566 static gboolean pr_size_clamp(PixbufRenderer *pr)
1567 {
1568         gint old_vw, old_vh;
1569
1570         old_vw = pr->vis_width;
1571         old_vh = pr->vis_height;
1572
1573         if (pr->width < pr->viewport_width)
1574                 {
1575                 pr->vis_width = pr->width;
1576                 pr->x_offset = (pr->viewport_width - pr->width) / 2;
1577                 }
1578         else
1579                 {
1580                 pr->vis_width = pr->viewport_width;
1581                 pr->x_offset = 0;
1582                 }
1583
1584         if (pr->height < pr->viewport_height)
1585                 {
1586                 pr->vis_height = pr->height;
1587                 pr->y_offset = (pr->viewport_height - pr->height) / 2;
1588                 }
1589         else
1590                 {
1591                 pr->vis_height = pr->viewport_height;
1592                 pr->y_offset = 0;
1593                 }
1594
1595         pixbuf_renderer_sync_scroll_center(pr);
1596
1597         return (old_vw != pr->vis_width || old_vh != pr->vis_height);
1598 }
1599
1600 static gboolean pr_zoom_clamp(PixbufRenderer *pr, gdouble zoom,
1601                               PrZoomFlags flags)
1602 {
1603         gint w, h;
1604         gdouble scale;
1605         gboolean force = !!(flags & PR_ZOOM_FORCE);
1606         gboolean new = !!(flags & PR_ZOOM_NEW);
1607
1608         zoom = CLAMP(zoom, pr->zoom_min, pr->zoom_max);
1609
1610         if (pr->zoom == zoom && !force) return FALSE;
1611
1612         w = pr->image_width;
1613         h = pr->image_height;
1614
1615         if (zoom == 0.0 && !pr->pixbuf)
1616                 {
1617                 scale = 1.0;
1618                 }
1619         else if (zoom == 0.0)
1620                 {
1621                 gint max_w;
1622                 gint max_h;
1623                 gboolean sizeable;
1624
1625                 sizeable = (new && pr_parent_window_sizable(pr));
1626
1627                 if (sizeable)
1628                         {
1629                         max_w = gdk_screen_width();
1630                         max_h = gdk_screen_height();
1631
1632                         if (pr->window_limit)
1633                                 {
1634                                 max_w = max_w * pr->window_limit_size / 100;
1635                                 max_h = max_h * pr->window_limit_size / 100;
1636                                 }
1637                         }
1638                 else
1639                         {
1640                         max_w = pr->viewport_width;
1641                         max_h = pr->viewport_height;
1642                         }
1643
1644                 if ((pr->zoom_expand && !sizeable) || w > max_w || h > max_h)
1645                         {
1646                         if ((gdouble)max_w / w > (gdouble)max_h / h / pr->aspect_ratio)
1647                                 {
1648                                 scale = (gdouble)max_h / h / pr->aspect_ratio;
1649                                 h = max_h;
1650                                 w = w * scale + 0.5;
1651                                 if (w > max_w) w = max_w;
1652                                 }
1653                         else
1654                                 {
1655                                 scale = (gdouble)max_w / w;
1656                                 w = max_w;
1657                                 h = h * scale * pr->aspect_ratio + 0.5;
1658                                 if (h > max_h) h = max_h;
1659                                 }
1660
1661                         if (pr->autofit_limit)
1662                                 {
1663                                 gdouble factor = (gdouble)pr->autofit_limit_size / 100;
1664                                 w = w * factor + 0.5;
1665                                 h = h * factor + 0.5;
1666                                 scale = scale * factor;
1667                                 }
1668
1669                         if (w < 1) w = 1;
1670                         if (h < 1) h = 1;
1671                         }
1672                 else
1673                         {
1674                         scale = 1.0;
1675                         }
1676                 }
1677         else if (zoom > 0.0) /* zoom orig, in */
1678                 {
1679                 scale = zoom;
1680                 w = w * scale;
1681                 h = h * scale * pr->aspect_ratio;
1682                 }
1683         else /* zoom out */
1684                 {
1685                 scale = 1.0 / (0.0 - zoom);
1686                 w = w * scale;
1687                 h = h * scale * pr->aspect_ratio;
1688                 }
1689
1690         pr->zoom = zoom;
1691         pr->width = w;
1692         pr->height = h;
1693         pr->scale = scale;
1694
1695         return TRUE;
1696 }
1697
1698 static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
1699                          PrZoomFlags flags, gint px, gint py)
1700 {
1701         gdouble old_scale;
1702         gint old_cx, old_cy;
1703         gboolean center_point = !!(flags & PR_ZOOM_CENTER);
1704         gboolean force = !!(flags & PR_ZOOM_FORCE);
1705         gboolean new = !!(flags & PR_ZOOM_NEW);
1706         gboolean lazy = !!(flags & PR_ZOOM_LAZY);
1707         PrZoomFlags clamp_flags = flags;
1708         gdouble old_center_x = pr->norm_center_x;
1709         gdouble old_center_y = pr->norm_center_y;
1710
1711         old_scale = pr->scale;
1712         if (center_point)
1713                 {
1714                 px = CLAMP(px, 0, pr->width);
1715                 py = CLAMP(py, 0, pr->height);
1716                 old_cx = pr->x_scroll + (px - pr->x_offset);
1717                 old_cy = pr->y_scroll + (py - pr->y_offset);
1718                 }
1719         else
1720                 {
1721                 px = py = 0;
1722                 old_cx = pr->x_scroll + pr->vis_width / 2;
1723                 old_cy = pr->y_scroll + pr->vis_height / 2;
1724                 }
1725
1726         if (force) clamp_flags |= PR_ZOOM_INVALIDATE;
1727         if (!pr_zoom_clamp(pr, zoom, clamp_flags)) return;
1728
1729         (void) pr_size_clamp(pr);
1730         (void) pr_parent_window_resize(pr, pr->width, pr->height);
1731
1732         if (force && new)
1733                 {
1734                 switch (pr->scroll_reset)
1735                         {
1736                         case PR_SCROLL_RESET_NOCHANGE:
1737                                 /* maintain old scroll position */
1738                                 pr->x_scroll = ((gdouble)pr->image_width * old_center_x * pr->scale) - pr->vis_width / 2;
1739                                 pr->y_scroll = ((gdouble)pr->image_height * old_center_y * pr->scale * pr->aspect_ratio) - pr->vis_height / 2;
1740                                 break;
1741                         case PR_SCROLL_RESET_CENTER:
1742                                 /* center new image */
1743                                 pr->x_scroll = ((gdouble)pr->image_width / 2.0 * pr->scale) - pr->vis_width / 2;
1744                                 pr->y_scroll = ((gdouble)pr->image_height / 2.0 * pr->scale * pr->aspect_ratio) - pr->vis_height / 2;
1745                                 break;
1746                         case PR_SCROLL_RESET_TOPLEFT:
1747                         default:
1748                                 /* reset to upper left */
1749                                 pr->x_scroll = 0;
1750                                 pr->y_scroll = 0;
1751                                 break;
1752                         }
1753                 }
1754         else
1755                 {
1756                 /* user zoom does not force, so keep visible center point */
1757                 if (center_point)
1758                         {
1759                         pr->x_scroll = old_cx / old_scale * pr->scale - (px - pr->x_offset);
1760                         pr->y_scroll = old_cy / old_scale * pr->scale * pr->aspect_ratio - (py - pr->y_offset);
1761                         }
1762                 else
1763                         {
1764                         pr->x_scroll = old_cx / old_scale * pr->scale - (pr->vis_width / 2);
1765                         pr->y_scroll = old_cy / old_scale * pr->scale * pr->aspect_ratio - (pr->vis_height / 2);
1766                         }
1767                 }
1768
1769         pr_scroll_clamp(pr);
1770
1771         pr->renderer->update_zoom(pr->renderer, lazy);
1772         if (pr->renderer2) pr->renderer2->update_zoom(pr->renderer2, lazy);
1773
1774         pr_scroll_notify_signal(pr);
1775         pr_zoom_signal(pr);
1776         pr_update_signal(pr);
1777 }
1778
1779 static void pr_size_sync(PixbufRenderer *pr, gint new_width, gint new_height)
1780 {
1781         gboolean zoom_changed = FALSE;
1782
1783         gint new_viewport_width = new_width;
1784         gint new_viewport_height = new_height;
1785
1786         if (!pr->stereo_temp_disable)
1787                 {
1788                 if (pr->stereo_mode & PR_STEREO_HORIZ)
1789                         {
1790                         new_viewport_width = new_width / 2;
1791                         }
1792                 else if (pr->stereo_mode & PR_STEREO_VERT)
1793                         {
1794                         new_viewport_height = new_height / 2;
1795                         }
1796                 else if (pr->stereo_mode & PR_STEREO_FIXED)
1797                         {
1798                         new_viewport_width = pr->stereo_fixed_width;
1799                         new_viewport_height = pr->stereo_fixed_height;
1800                         }
1801                 }
1802
1803         if (pr->window_width == new_width && pr->window_height == new_height &&
1804             pr->viewport_width == new_viewport_width && pr->viewport_height == new_viewport_height) return;
1805
1806         pr->window_width = new_width;
1807         pr->window_height = new_height;
1808         pr->viewport_width = new_viewport_width;
1809         pr->viewport_height = new_viewport_height;
1810
1811         if (pr->zoom == 0.0)
1812                 {
1813                 gdouble old_scale = pr->scale;
1814                 pr_zoom_clamp(pr, 0.0, PR_ZOOM_FORCE);
1815                 zoom_changed = (old_scale != pr->scale);
1816                 }
1817
1818         pr_size_clamp(pr);
1819         pr_scroll_clamp(pr);
1820
1821         if (zoom_changed)
1822                 {
1823                 pr->renderer->update_zoom(pr->renderer, FALSE);
1824                 if (pr->renderer2) pr->renderer2->update_zoom(pr->renderer2, FALSE);
1825                 }
1826
1827         pr->renderer->update_viewport(pr->renderer);
1828         if (pr->renderer2) pr->renderer2->update_viewport(pr->renderer2);
1829
1830
1831         /* ensure scroller remains visible */
1832         if (pr->scroller_overlay != -1)
1833                 {
1834                 gboolean update = FALSE;
1835
1836                 if (pr->scroller_x > new_width)
1837                         {
1838                         pr->scroller_x = new_width;
1839                         pr->scroller_xpos = new_width;
1840                         update = TRUE;
1841                         }
1842                 if (pr->scroller_y > new_height)
1843                         {
1844                         pr->scroller_y = new_height;
1845                         pr->scroller_ypos = new_height;
1846                         update = TRUE;
1847                         }
1848
1849                 if (update)
1850                         {
1851                         GdkPixbuf *pixbuf;
1852
1853                         if (pixbuf_renderer_overlay_get(pr, pr->scroller_overlay, &pixbuf, NULL, NULL))
1854                                 {
1855                                 gint w, h;
1856
1857                                 w = gdk_pixbuf_get_width(pixbuf);
1858                                 h = gdk_pixbuf_get_height(pixbuf);
1859                                 pixbuf_renderer_overlay_set(pr, pr->scroller_overlay, pixbuf,
1860                                                             pr->scroller_x - w / 2, pr->scroller_y - h / 2);
1861                                 }
1862                         }
1863                 }
1864
1865         pr_scroll_notify_signal(pr);
1866         if (zoom_changed) pr_zoom_signal(pr);
1867         pr_update_signal(pr);
1868 }
1869
1870 static void pr_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
1871 {
1872         PixbufRenderer *pr = data;
1873
1874         pr_size_sync(pr, allocation->width, allocation->height);
1875 }
1876
1877 /*
1878  *-------------------------------------------------------------------
1879  * scrolling
1880  *-------------------------------------------------------------------
1881  */
1882
1883 void pixbuf_renderer_scroll(PixbufRenderer *pr, gint x, gint y)
1884 {
1885         gint old_x, old_y;
1886         gint x_off, y_off;
1887
1888         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
1889
1890         if (!pr->pixbuf && !pr->source_tiles_enabled) return;
1891
1892         old_x = pr->x_scroll;
1893         old_y = pr->y_scroll;
1894
1895         pr->x_scroll += x;
1896         pr->y_scroll += y;
1897
1898         pr_scroll_clamp(pr);
1899
1900         pixbuf_renderer_sync_scroll_center(pr);
1901
1902         if (pr->x_scroll == old_x && pr->y_scroll == old_y) return;
1903
1904         pr_scroll_notify_signal(pr);
1905
1906         x_off = pr->x_scroll - old_x;
1907         y_off = pr->y_scroll - old_y;
1908
1909         pr->renderer->scroll(pr->renderer, x_off, y_off);
1910         if (pr->renderer2) pr->renderer2->scroll(pr->renderer2, x_off, y_off);
1911 }
1912
1913 void pixbuf_renderer_scroll_to_point(PixbufRenderer *pr, gint x, gint y,
1914                                      gdouble x_align, gdouble y_align)
1915 {
1916         gint px, py;
1917         gint ax, ay;
1918
1919         x_align = CLAMP(x_align, 0.0, 1.0);
1920         y_align = CLAMP(y_align, 0.0, 1.0);
1921
1922         ax = (gdouble)pr->vis_width * x_align;
1923         ay = (gdouble)pr->vis_height * y_align;
1924
1925         px = (gdouble)x * pr->scale - (pr->x_scroll + ax);
1926         py = (gdouble)y * pr->scale * pr->aspect_ratio - (pr->y_scroll + ay);
1927
1928         pixbuf_renderer_scroll(pr, px, py);
1929 }
1930
1931 /* get or set coordinates of viewport center in the image, in range 0.0 - 1.0 */
1932
1933 void pixbuf_renderer_get_scroll_center(PixbufRenderer *pr, gdouble *x, gdouble *y)
1934 {
1935         *x = pr->norm_center_x;
1936         *y = pr->norm_center_y;
1937 }
1938
1939 void pixbuf_renderer_set_scroll_center(PixbufRenderer *pr, gdouble x, gdouble y)
1940 {
1941         gdouble dst_x, dst_y;
1942
1943         dst_x = x * pr->width  - pr->vis_width  / 2 - pr->x_scroll + CLAMP(pr->subpixel_x_scroll, -1.0, 1.0);
1944         dst_y = y * pr->height - pr->vis_height / 2 - pr->y_scroll + CLAMP(pr->subpixel_y_scroll, -1.0, 1.0);
1945
1946         pr->subpixel_x_scroll = dst_x - (gint)dst_x;
1947         pr->subpixel_y_scroll = dst_y - (gint)dst_y;
1948
1949         pixbuf_renderer_scroll(pr, (gint)dst_x, (gint)dst_y);
1950 }
1951
1952 /*
1953  *-------------------------------------------------------------------
1954  * mouse
1955  *-------------------------------------------------------------------
1956  */
1957
1958 static gboolean pr_mouse_motion_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
1959 {
1960         PixbufRenderer *pr;
1961         gint accel;
1962
1963         /* This is a hack, but work far the best, at least for single pointer systems.
1964          * See http://bugzilla.gnome.org/show_bug.cgi?id=587714 for more. */
1965         gint x, y;
1966         gdk_window_get_pointer (bevent->window, &x, &y, NULL);
1967         bevent->x = x;
1968         bevent->y = y;
1969
1970         pr = PIXBUF_RENDERER(widget);
1971
1972         if (pr->scroller_id)
1973                 {
1974                 pr->scroller_xpos = bevent->x;
1975                 pr->scroller_ypos = bevent->y;
1976                 }
1977
1978         pr->x_mouse = bevent->x;
1979         pr->y_mouse = bevent->y;
1980         pr_update_pixel_signal(pr);
1981
1982         if (!pr->in_drag || !gdk_pointer_is_grabbed()) return FALSE;
1983
1984         if (pr->drag_moved < PR_DRAG_SCROLL_THRESHHOLD)
1985                 {
1986                 pr->drag_moved++;
1987                 }
1988         else
1989                 {
1990                 widget_set_cursor(widget, GDK_FLEUR);
1991                 }
1992
1993         if (bevent->state & GDK_CONTROL_MASK)
1994                 {
1995                 accel = PR_PAN_SHIFT_MULTIPLIER;
1996                 }
1997         else
1998                 {
1999                 accel = 1;
2000                 }
2001
2002         /* do the scroll */
2003         pixbuf_renderer_scroll(pr, (pr->drag_last_x - bevent->x) * accel,
2004                                (pr->drag_last_y - bevent->y) * accel);
2005
2006         pr_drag_signal(pr, bevent);
2007
2008         pr->drag_last_x = bevent->x;
2009         pr->drag_last_y = bevent->y;
2010
2011         /* This is recommended by the GTK+ documentation, but does not work properly.
2012          * Use deprecated way until GTK+ gets a solution for correct motion hint handling:
2013          * http://bugzilla.gnome.org/show_bug.cgi?id=587714
2014          */
2015         /* gdk_event_request_motions (bevent); */
2016         return FALSE;
2017 }
2018
2019 static gboolean pr_leave_notify_cb(GtkWidget *widget, GdkEventCrossing *cevent, gpointer data)
2020 {
2021         PixbufRenderer *pr;
2022
2023         pr = PIXBUF_RENDERER(widget);
2024         pr->x_mouse = -1;
2025         pr->y_mouse = -1;
2026
2027         pr_update_pixel_signal(pr);
2028         return FALSE;
2029 }
2030
2031 static gboolean pr_mouse_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
2032 {
2033         PixbufRenderer *pr;
2034         GtkWidget *parent;
2035
2036         pr = PIXBUF_RENDERER(widget);
2037
2038         if (pr->scroller_id) return TRUE;
2039
2040         switch (bevent->button)
2041                 {
2042                 case MOUSE_BUTTON_LEFT:
2043                         pr->in_drag = TRUE;
2044                         pr->drag_last_x = bevent->x;
2045                         pr->drag_last_y = bevent->y;
2046                         pr->drag_moved = 0;
2047                         gdk_pointer_grab(gtk_widget_get_window(widget), FALSE,
2048                                          GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_RELEASE_MASK,
2049                                          NULL, NULL, bevent->time);
2050                         gtk_grab_add(widget);
2051                         break;
2052                 case MOUSE_BUTTON_MIDDLE:
2053                         pr->drag_moved = 0;
2054                         break;
2055                 case MOUSE_BUTTON_RIGHT:
2056                         pr_clicked_signal(pr, bevent);
2057                         break;
2058                 default:
2059                         break;
2060                 }
2061
2062         parent = gtk_widget_get_parent(widget);
2063         if (widget && gtk_widget_get_can_focus(parent))
2064                 {
2065                 gtk_widget_grab_focus(parent);
2066                 }
2067
2068         return FALSE;
2069 }
2070
2071 static gboolean pr_mouse_release_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
2072 {
2073         PixbufRenderer *pr;
2074
2075         pr = PIXBUF_RENDERER(widget);
2076
2077         if (pr->scroller_id)
2078                 {
2079                 pr_scroller_stop(pr);
2080                 return TRUE;
2081                 }
2082
2083         if (gdk_pointer_is_grabbed() && gtk_widget_has_grab(GTK_WIDGET(pr)))
2084                 {
2085                 gtk_grab_remove(widget);
2086                 gdk_pointer_ungrab(bevent->time);
2087                 widget_set_cursor(widget, -1);
2088                 }
2089
2090         if (pr->drag_moved < PR_DRAG_SCROLL_THRESHHOLD)
2091                 {
2092                 if (bevent->button == MOUSE_BUTTON_LEFT && (bevent->state & GDK_CONTROL_MASK))
2093                         {
2094                         pr_scroller_start(pr, bevent->x, bevent->y);
2095                         }
2096                 else if (bevent->button == MOUSE_BUTTON_LEFT || bevent->button == MOUSE_BUTTON_MIDDLE)
2097                         {
2098                         pr_clicked_signal(pr, bevent);
2099                         }
2100                 }
2101
2102         pr->in_drag = FALSE;
2103
2104         return FALSE;
2105 }
2106
2107 static gboolean pr_mouse_leave_cb(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
2108 {
2109         PixbufRenderer *pr;
2110
2111         pr = PIXBUF_RENDERER(widget);
2112
2113         if (pr->scroller_id)
2114                 {
2115                 pr->scroller_xpos = pr->scroller_x;
2116                 pr->scroller_ypos = pr->scroller_y;
2117                 pr->scroller_xinc = 0;
2118                 pr->scroller_yinc = 0;
2119                 }
2120
2121         return FALSE;
2122 }
2123
2124 static void pr_mouse_drag_cb(GtkWidget *widget, GdkDragContext *context, gpointer data)
2125 {
2126         PixbufRenderer *pr;
2127
2128         pr = PIXBUF_RENDERER(widget);
2129
2130         pr->drag_moved = PR_DRAG_SCROLL_THRESHHOLD;
2131 }
2132
2133 static void pr_signals_connect(PixbufRenderer *pr)
2134 {
2135         g_signal_connect(G_OBJECT(pr), "motion_notify_event",
2136                          G_CALLBACK(pr_mouse_motion_cb), pr);
2137         g_signal_connect(G_OBJECT(pr), "button_press_event",
2138                          G_CALLBACK(pr_mouse_press_cb), pr);
2139         g_signal_connect(G_OBJECT(pr), "button_release_event",
2140                          G_CALLBACK(pr_mouse_release_cb), pr);
2141         g_signal_connect(G_OBJECT(pr), "leave_notify_event",
2142                          G_CALLBACK(pr_mouse_leave_cb), pr);
2143         g_signal_connect(G_OBJECT(pr), "leave_notify_event",
2144                          G_CALLBACK(pr_leave_notify_cb), pr);
2145
2146         gtk_widget_set_events(GTK_WIDGET(pr), GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |
2147                                               GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK | GDK_SCROLL_MASK |
2148                                               GDK_LEAVE_NOTIFY_MASK);
2149
2150         g_signal_connect(G_OBJECT(pr), "drag_begin",
2151                          G_CALLBACK(pr_mouse_drag_cb), pr);
2152
2153 }
2154
2155 /*
2156  *-------------------------------------------------------------------
2157  * stereo support
2158  *-------------------------------------------------------------------
2159  */
2160
2161 #define COLOR_BYTES 3   /* rgb */
2162 #define RC 0            /* Red-Cyan */
2163 #define GM 1            /* Green-Magenta */
2164 #define YB 2            /* Yellow-Blue */
2165
2166 static void pr_create_anaglyph_color(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h, guint mode)
2167 {
2168         gint srs, drs;
2169         guchar *s_pix, *d_pix;
2170         guchar *sp, *dp;
2171         guchar *spi, *dpi;
2172         gint i, j;
2173
2174         srs = gdk_pixbuf_get_rowstride(right);
2175         s_pix = gdk_pixbuf_get_pixels(right);
2176         spi = s_pix + (x * COLOR_BYTES);
2177
2178         drs = gdk_pixbuf_get_rowstride(pixbuf);
2179         d_pix = gdk_pixbuf_get_pixels(pixbuf);
2180         dpi =  d_pix + x * COLOR_BYTES;
2181
2182         for (i = y; i < y + h; i++)
2183                 {
2184                 sp = spi + (i * srs);
2185                 dp = dpi + (i * drs);
2186                 for (j = 0; j < w; j++)
2187                         {
2188                         switch(mode)
2189                                 {
2190                                 case RC:
2191                                         dp[0] = sp[0]; /* copy red channel */
2192                                         break;
2193                                 case GM:
2194                                         dp[1] = sp[1];
2195                                         break;
2196                                 case YB:
2197                                         dp[0] = sp[0];
2198                                         dp[1] = sp[1];
2199                                         break;
2200                                 }
2201                         sp += COLOR_BYTES;
2202                         dp += COLOR_BYTES;
2203                         }
2204                 }
2205 }
2206
2207 static void pr_create_anaglyph_gray(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h, guint mode)
2208 {
2209         gint srs, drs;
2210         guchar *s_pix, *d_pix;
2211         guchar *sp, *dp;
2212         guchar *spi, *dpi;
2213         gint i, j;
2214         const double gc[3] = {0.299, 0.587, 0.114};
2215
2216         srs = gdk_pixbuf_get_rowstride(right);
2217         s_pix = gdk_pixbuf_get_pixels(right);
2218         spi = s_pix + (x * COLOR_BYTES);
2219
2220         drs = gdk_pixbuf_get_rowstride(pixbuf);
2221         d_pix = gdk_pixbuf_get_pixels(pixbuf);
2222         dpi =  d_pix + x * COLOR_BYTES;
2223
2224         for (i = y; i < y + h; i++)
2225                 {
2226                 sp = spi + (i * srs);
2227                 dp = dpi + (i * drs);
2228                 for (j = 0; j < w; j++)
2229                         {
2230                         guchar g1 = dp[0] * gc[0] + dp[1] * gc[1] + dp[2] * gc[2];
2231                         guchar g2 = sp[0] * gc[0] + sp[1] * gc[1] + sp[2] * gc[2];
2232                         switch(mode)
2233                                 {
2234                                 case RC:
2235                                         dp[0] = g2; /* red channel from sp */
2236                                         dp[1] = g1; /* green and blue from dp */
2237                                         dp[2] = g1;
2238                                         break;
2239                                 case GM:
2240                                         dp[0] = g1;
2241                                         dp[1] = g2;
2242                                         dp[2] = g1;
2243                                         break;
2244                                 case YB:
2245                                         dp[0] = g2;
2246                                         dp[1] = g2;
2247                                         dp[2] = g1;
2248                                         break;
2249                                 }
2250                         sp += COLOR_BYTES;
2251                         dp += COLOR_BYTES;
2252                         }
2253                 }
2254 }
2255
2256 static void pr_create_anaglyph_dubois(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h, guint mode)
2257 {
2258         gint srs, drs;
2259         guchar *s_pix, *d_pix;
2260         guchar *sp, *dp;
2261         guchar *spi, *dpi;
2262         gint i, j, k;
2263         double pr_dubois_matrix[3][6];
2264         const static double pr_dubois_matrix_RC[3][6] = {
2265                 { 0.456,  0.500,  0.176, -0.043, -0.088, -0.002},
2266                 {-0.040, -0.038, -0.016,  0.378,  0.734, -0.018},
2267                 {-0.015, -0.021, -0.005, -0.072, -0.113,  1.226}};
2268         const static double pr_dubois_matrix_GM[3][6] = {
2269                 {-0.062, -0.158, -0.039,  0.529,  0.705,  0.024},
2270                 { 0.284,  0.668,  0.143, -0.016, -0.015, -0.065},
2271                 {-0.015, -0.027,  0.021,  0.009,  0.075,  0.937}};
2272         const static double pr_dubois_matrix_YB[3][6] = {
2273                 { 1.000, -0.193,  0.282, -0.015, -0.116, -0.016},
2274                 {-0.024,  0.855,  0.064,  0.006,  0.058, -0.016},
2275                 {-0.036, -0.163,  0.021,  0.089,  0.174,  0.858}};
2276
2277         switch(mode)
2278                 {
2279                 case RC:
2280                         memcpy(pr_dubois_matrix, pr_dubois_matrix_RC, sizeof pr_dubois_matrix);
2281                         break;
2282                 case GM:
2283                         memcpy(pr_dubois_matrix, pr_dubois_matrix_GM, sizeof pr_dubois_matrix);
2284                         break;
2285                 case YB:
2286                         memcpy(pr_dubois_matrix, pr_dubois_matrix_YB, sizeof pr_dubois_matrix);
2287                         break;
2288                 }
2289
2290         srs = gdk_pixbuf_get_rowstride(right);
2291         s_pix = gdk_pixbuf_get_pixels(right);
2292         spi = s_pix + (x * COLOR_BYTES);
2293
2294         drs = gdk_pixbuf_get_rowstride(pixbuf);
2295         d_pix = gdk_pixbuf_get_pixels(pixbuf);
2296         dpi =  d_pix + x * COLOR_BYTES;
2297
2298         for (i = y; i < y + h; i++)
2299                 {
2300                 sp = spi + (i * srs);
2301                 dp = dpi + (i * drs);
2302                 for (j = 0; j < w; j++)
2303                         {
2304                         double res[3];
2305                         for (k = 0; k < 3; k++)
2306                                 {
2307                                 const double *m = pr_dubois_matrix[k];
2308                                 res[k] = sp[0] * m[0] + sp[1] * m[1] + sp[2] * m[2] + dp[0] * m[3] + dp[1] * m[4] + dp[2] * m[5];
2309                                 if (res[k] < 0.0) res[k] = 0;
2310                                 if (res[k] > 255.0) res[k] = 255.0;
2311                                 }
2312                         dp[0] = res[0];
2313                         dp[1] = res[1];
2314                         dp[2] = res[2];
2315                         sp += COLOR_BYTES;
2316                         dp += COLOR_BYTES;
2317                         }
2318                 }
2319 }
2320
2321 void pr_create_anaglyph(guint mode, GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h)
2322 {
2323         if (mode & PR_STEREO_ANAGLYPH_RC)
2324                 pr_create_anaglyph_color(pixbuf, right, x, y, w, h, RC);
2325         else if (mode & PR_STEREO_ANAGLYPH_GM)
2326                 pr_create_anaglyph_color(pixbuf, right, x, y, w, h, GM);
2327         else if (mode & PR_STEREO_ANAGLYPH_YB)
2328                 pr_create_anaglyph_color(pixbuf, right, x, y, w, h, YB);
2329         else if (mode & PR_STEREO_ANAGLYPH_GRAY_RC)
2330                 pr_create_anaglyph_gray(pixbuf, right, x, y, w, h, RC);
2331         else if (mode & PR_STEREO_ANAGLYPH_GRAY_GM)
2332                 pr_create_anaglyph_gray(pixbuf, right, x, y, w, h, GM);
2333         else if (mode & PR_STEREO_ANAGLYPH_GRAY_YB)
2334                 pr_create_anaglyph_gray(pixbuf, right, x, y, w, h, YB);
2335         else if (mode & PR_STEREO_ANAGLYPH_DB_RC)
2336                 pr_create_anaglyph_dubois(pixbuf, right, x, y, w, h, RC);
2337         else if (mode & PR_STEREO_ANAGLYPH_DB_GM)
2338                 pr_create_anaglyph_dubois(pixbuf, right, x, y, w, h, GM);
2339         else if (mode & PR_STEREO_ANAGLYPH_DB_YB)
2340                 pr_create_anaglyph_dubois(pixbuf, right, x, y, w, h, YB);
2341 }
2342
2343 /*
2344  *-------------------------------------------------------------------
2345  * public
2346  *-------------------------------------------------------------------
2347  */
2348 static void pr_pixbuf_size_sync(PixbufRenderer *pr)
2349 {
2350         pr->stereo_pixbuf_offset_left = 0;
2351         pr->stereo_pixbuf_offset_right = 0;
2352         if (!pr->pixbuf) return;
2353         switch (pr->orientation)
2354                 {
2355                 case EXIF_ORIENTATION_LEFT_TOP:
2356                 case EXIF_ORIENTATION_RIGHT_TOP:
2357                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
2358                 case EXIF_ORIENTATION_LEFT_BOTTOM:
2359                         pr->image_width = gdk_pixbuf_get_height(pr->pixbuf);
2360                         pr->image_height = gdk_pixbuf_get_width(pr->pixbuf);
2361                         if (pr->stereo_data == STEREO_PIXBUF_SBS)
2362                                 {
2363                                 pr->image_height /= 2;
2364                                 pr->stereo_pixbuf_offset_right = pr->image_height;
2365                                 }
2366                         else if (pr->stereo_data == STEREO_PIXBUF_CROSS)
2367                                 {
2368                                 pr->image_height /= 2;
2369                                 pr->stereo_pixbuf_offset_left = pr->image_height;
2370                                 }
2371
2372                         break;
2373                 default:
2374                         pr->image_width = gdk_pixbuf_get_width(pr->pixbuf);
2375                         pr->image_height = gdk_pixbuf_get_height(pr->pixbuf);
2376                         if (pr->stereo_data == STEREO_PIXBUF_SBS)
2377                                 {
2378                                 pr->image_width /= 2;
2379                                 pr->stereo_pixbuf_offset_right = pr->image_width;
2380                                 }
2381                         else if (pr->stereo_data == STEREO_PIXBUF_CROSS)
2382                                 {
2383                                 pr->image_width /= 2;
2384                                 pr->stereo_pixbuf_offset_left = pr->image_width;
2385                                 }
2386                 }
2387 }
2388
2389 static void pr_set_pixbuf(PixbufRenderer *pr, GdkPixbuf *pixbuf, gdouble zoom, PrZoomFlags flags)
2390 {
2391         if (pixbuf) g_object_ref(pixbuf);
2392         if (pr->pixbuf) g_object_unref(pr->pixbuf);
2393         pr->pixbuf = pixbuf;
2394
2395         if (!pr->pixbuf)
2396                 {
2397                 /* no pixbuf so just clear the window */
2398                 pr->image_width = 0;
2399                 pr->image_height = 0;
2400                 pr->scale = 1.0;
2401                 pr->zoom = zoom; /* don't throw away the zoom value, it is set by pixbuf_renderer_move, among others,
2402                                     and used for pixbuf_renderer_zoom_get */
2403
2404                 pr->renderer->update_pixbuf(pr->renderer, flags & PR_ZOOM_LAZY);
2405                 if (pr->renderer2) pr->renderer2->update_pixbuf(pr->renderer2, flags & PR_ZOOM_LAZY);
2406
2407                 pr_update_signal(pr);
2408
2409                 return;
2410                 }
2411
2412         if (pr->stereo_mode & PR_STEREO_TEMP_DISABLE)
2413                 {
2414                 gint disable = !pr->pixbuf || ! pr->stereo_data;
2415                 pr_stereo_temp_disable(pr, disable);
2416                 }
2417
2418         pr_pixbuf_size_sync(pr);
2419         pr->renderer->update_pixbuf(pr->renderer, flags & PR_ZOOM_LAZY);
2420         if (pr->renderer2) pr->renderer2->update_pixbuf(pr->renderer2, flags & PR_ZOOM_LAZY);
2421         pr_zoom_sync(pr, zoom, flags | PR_ZOOM_FORCE | PR_ZOOM_NEW, 0, 0);
2422 }
2423
2424 void pixbuf_renderer_set_pixbuf(PixbufRenderer *pr, GdkPixbuf *pixbuf, gdouble zoom)
2425 {
2426         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2427
2428         pr_source_tile_unset(pr);
2429
2430         pr_set_pixbuf(pr, pixbuf, zoom, 0);
2431
2432         pr_update_signal(pr);
2433 }
2434
2435 void pixbuf_renderer_set_pixbuf_lazy(PixbufRenderer *pr, GdkPixbuf *pixbuf, gdouble zoom, gint orientation, StereoPixbufData stereo_data)
2436 {
2437         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2438
2439         pr_source_tile_unset(pr);
2440
2441         pr->orientation = orientation;
2442         pr->stereo_data = stereo_data;
2443         pr_set_pixbuf(pr, pixbuf, zoom, PR_ZOOM_LAZY);
2444
2445         pr_update_signal(pr);
2446 }
2447
2448 GdkPixbuf *pixbuf_renderer_get_pixbuf(PixbufRenderer *pr)
2449 {
2450         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), NULL);
2451
2452         return pr->pixbuf;
2453 }
2454
2455 void pixbuf_renderer_set_orientation(PixbufRenderer *pr, gint orientation)
2456 {
2457         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2458
2459         pr->orientation = orientation;
2460
2461         pr_pixbuf_size_sync(pr);
2462         pr_zoom_sync(pr, pr->zoom, PR_ZOOM_FORCE, 0, 0);
2463 }
2464
2465 gint pixbuf_renderer_get_orientation(PixbufRenderer *pr)
2466 {
2467         if (!pr) return 1;
2468         return pr->orientation;
2469 }
2470
2471 void pixbuf_renderer_set_stereo_data(PixbufRenderer *pr, StereoPixbufData stereo_data)
2472 {
2473         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2474         if (pr->stereo_data == stereo_data) return;
2475
2476
2477         pr->stereo_data = stereo_data;
2478
2479         if (pr->stereo_mode & PR_STEREO_TEMP_DISABLE)
2480                 {
2481                 gint disable = !pr->pixbuf || ! pr->stereo_data;
2482                 pr_stereo_temp_disable(pr, disable);
2483                 }
2484         pr_pixbuf_size_sync(pr);
2485         pr->renderer->update_pixbuf(pr->renderer, FALSE);
2486         if (pr->renderer2) pr->renderer2->update_pixbuf(pr->renderer2, FALSE);
2487         pr_zoom_sync(pr, pr->zoom, PR_ZOOM_FORCE, 0, 0);
2488 }
2489
2490 void pixbuf_renderer_set_post_process_func(PixbufRenderer *pr, PixbufRendererPostProcessFunc func, gpointer user_data, gboolean slow)
2491 {
2492         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2493
2494         pr->func_post_process = func;
2495         pr->post_process_user_data = user_data;
2496         pr->post_process_slow = func && slow;
2497
2498 }
2499
2500
2501 void pixbuf_renderer_move(PixbufRenderer *pr, PixbufRenderer *source)
2502 {
2503         GObject *object;
2504         PixbufRendererScrollResetType scroll_reset;
2505
2506         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2507         g_return_if_fail(IS_PIXBUF_RENDERER(source));
2508
2509         if (pr == source) return;
2510
2511         object = G_OBJECT(pr);
2512
2513         g_object_set(object, "zoom_min", source->zoom_min, NULL);
2514         g_object_set(object, "zoom_max", source->zoom_max, NULL);
2515         g_object_set(object, "loading", source->loading, NULL);
2516
2517         pr->complete = source->complete;
2518
2519         pr->x_scroll = source->x_scroll;
2520         pr->y_scroll = source->y_scroll;
2521         pr->x_mouse  = source->x_mouse;
2522         pr->y_mouse  = source->y_mouse;
2523
2524         scroll_reset = pr->scroll_reset;
2525         pr->scroll_reset = PR_SCROLL_RESET_NOCHANGE;
2526
2527         pr->func_post_process = source->func_post_process;
2528         pr->post_process_user_data = source->post_process_user_data;
2529         pr->post_process_slow = source->post_process_slow;
2530         pr->orientation = source->orientation;
2531         pr->stereo_data = source->stereo_data;
2532
2533         if (source->source_tiles_enabled)
2534                 {
2535                 pr_source_tile_unset(pr);
2536
2537                 pr->source_tiles_enabled = source->source_tiles_enabled;
2538                 pr->source_tiles_cache_size = source->source_tiles_cache_size;
2539                 pr->source_tile_width = source->source_tile_width;
2540                 pr->source_tile_height = source->source_tile_height;
2541                 pr->image_width = source->image_width;
2542                 pr->image_height = source->image_height;
2543
2544                 pr->func_tile_request = source->func_tile_request;
2545                 pr->func_tile_dispose = source->func_tile_dispose;
2546                 pr->func_tile_data = source->func_tile_data;
2547
2548                 pr->source_tiles = source->source_tiles;
2549                 source->source_tiles = NULL;
2550
2551                 pr_zoom_sync(pr, source->zoom, PR_ZOOM_FORCE | PR_ZOOM_NEW, 0, 0);
2552                 }
2553         else
2554                 {
2555                 pixbuf_renderer_set_pixbuf(pr, source->pixbuf, source->zoom);
2556                 }
2557
2558         pr->scroll_reset = scroll_reset;
2559
2560         pixbuf_renderer_set_pixbuf(source, NULL, source->zoom);
2561 }
2562
2563 void pixbuf_renderer_copy(PixbufRenderer *pr, PixbufRenderer *source)
2564 {
2565         GObject *object;
2566         PixbufRendererScrollResetType scroll_reset;
2567
2568         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2569         g_return_if_fail(IS_PIXBUF_RENDERER(source));
2570
2571         if (pr == source) return;
2572
2573         object = G_OBJECT(pr);
2574
2575         g_object_set(object, "zoom_min", source->zoom_min, NULL);
2576         g_object_set(object, "zoom_max", source->zoom_max, NULL);
2577         g_object_set(object, "loading", source->loading, NULL);
2578
2579         pr->complete = source->complete;
2580
2581         pr->x_scroll = source->x_scroll;
2582         pr->y_scroll = source->y_scroll;
2583         pr->x_mouse  = source->x_mouse;
2584         pr->y_mouse  = source->y_mouse;
2585
2586         scroll_reset = pr->scroll_reset;
2587         pr->scroll_reset = PR_SCROLL_RESET_NOCHANGE;
2588
2589         pr->orientation = source->orientation;
2590         pr->stereo_data = source->stereo_data;
2591
2592         if (source->source_tiles_enabled)
2593                 {
2594                 pr->source_tiles_enabled = source->source_tiles_enabled;
2595                 pr->source_tiles_cache_size = source->source_tiles_cache_size;
2596                 pr->source_tile_width = source->source_tile_width;
2597                 pr->source_tile_height = source->source_tile_height;
2598                 pr->image_width = source->image_width;
2599                 pr->image_height = source->image_height;
2600
2601                 pr->func_tile_request = source->func_tile_request;
2602                 pr->func_tile_dispose = source->func_tile_dispose;
2603                 pr->func_tile_data = source->func_tile_data;
2604
2605                 pr->source_tiles = source->source_tiles;
2606                 source->source_tiles = NULL;
2607
2608                 pr_zoom_sync(pr, source->zoom, PR_ZOOM_FORCE | PR_ZOOM_NEW, 0, 0);
2609                 }
2610         else
2611                 {
2612                 pixbuf_renderer_set_pixbuf(pr, source->pixbuf, source->zoom);
2613                 }
2614
2615         pr->scroll_reset = scroll_reset;
2616 }
2617
2618 void pixbuf_renderer_area_changed(PixbufRenderer *pr, gint x, gint y, gint w, gint h)
2619 {
2620         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2621
2622         if (pr->source_tiles_enabled)
2623                 {
2624                 pr_source_tile_changed(pr, x, y, w, h);
2625                 }
2626
2627         pr->renderer->area_changed(pr->renderer, x, y, w, h);
2628         if (pr->renderer2) pr->renderer2->area_changed(pr->renderer2, x, y, w, h);
2629 }
2630
2631 void pixbuf_renderer_zoom_adjust(PixbufRenderer *pr, gdouble increment)
2632 {
2633         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2634
2635         pr_zoom_adjust_real(pr, increment, PR_ZOOM_NONE, 0, 0);
2636 }
2637
2638 void pixbuf_renderer_zoom_adjust_at_point(PixbufRenderer *pr, gdouble increment, gint x, gint y)
2639 {
2640         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2641
2642         pr_zoom_adjust_real(pr, increment, PR_ZOOM_CENTER, x, y);
2643 }
2644
2645 void pixbuf_renderer_zoom_set(PixbufRenderer *pr, gdouble zoom)
2646 {
2647         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2648
2649         pr_zoom_sync(pr, zoom, PR_ZOOM_NONE, 0, 0);
2650 }
2651
2652 gdouble pixbuf_renderer_zoom_get(PixbufRenderer *pr)
2653 {
2654         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), 1.0);
2655
2656         return pr->zoom;
2657 }
2658
2659 gdouble pixbuf_renderer_zoom_get_scale(PixbufRenderer *pr)
2660 {
2661         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), 1.0);
2662
2663         return pr->scale;
2664 }
2665
2666 void pixbuf_renderer_zoom_set_limits(PixbufRenderer *pr, gdouble min, gdouble max)
2667 {
2668         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2669
2670         if (min > 1.0 || max < 1.0) return;
2671         if (min < 1.0 && min > -1.0) return;
2672         if (min < -200.0 || max > 200.0) return;
2673
2674         if (pr->zoom_min != min)
2675                 {
2676                 pr->zoom_min = min;
2677                 g_object_notify(G_OBJECT(pr), "zoom_min");
2678                 }
2679         if (pr->zoom_max != max)
2680                 {
2681                 pr->zoom_max = max;
2682                 g_object_notify(G_OBJECT(pr), "zoom_max");
2683                 }
2684 }
2685
2686 static void pr_stereo_set(PixbufRenderer *pr)
2687 {
2688         if (!pr->renderer) pr->renderer = pr_backend_renderer_new(pr);
2689
2690         pr->renderer->stereo_set(pr->renderer, pr->stereo_mode & ~PR_STEREO_MIRROR_RIGHT & ~PR_STEREO_FLIP_RIGHT);
2691
2692         if (pr->stereo_mode & (PR_STEREO_HORIZ | PR_STEREO_VERT | PR_STEREO_FIXED))
2693                 {
2694                 if (!pr->renderer2) pr->renderer2 = pr_backend_renderer_new(pr);
2695                 pr->renderer2->stereo_set(pr->renderer2, (pr->stereo_mode & ~PR_STEREO_MIRROR_LEFT & ~PR_STEREO_FLIP_LEFT) | PR_STEREO_RIGHT);
2696                 }
2697         else
2698                 {
2699                 if (pr->renderer2) pr->renderer2->free(pr->renderer2);
2700                 pr->renderer2 = NULL;
2701                 }
2702         if (pr->stereo_mode & PR_STEREO_HALF)
2703                 {
2704                 if (pr->stereo_mode & PR_STEREO_HORIZ) pr->aspect_ratio = 2.0;
2705                 else if (pr->stereo_mode & PR_STEREO_VERT) pr->aspect_ratio = 0.5;
2706                 else pr->aspect_ratio = 1.0;
2707                 }
2708         else
2709                 {
2710                 pr->aspect_ratio = 1.0;
2711                 }
2712 }
2713
2714 void pixbuf_renderer_stereo_set(PixbufRenderer *pr, gint stereo_mode)
2715 {
2716         gboolean redraw = !(pr->stereo_mode == stereo_mode) || pr->stereo_temp_disable;
2717         pr->stereo_mode = stereo_mode;
2718         if ((stereo_mode & PR_STEREO_TEMP_DISABLE) && pr->stereo_temp_disable) return;
2719
2720         pr->stereo_temp_disable = FALSE;
2721
2722         pr_stereo_set(pr);
2723
2724         if (redraw)
2725                 {
2726                 pr_size_sync(pr, pr->window_width, pr->window_height); /* recalculate new viewport */
2727                 pr_zoom_sync(pr, pr->zoom, PR_ZOOM_FORCE | PR_ZOOM_NEW, 0, 0);
2728                 }
2729 }
2730
2731 void pixbuf_renderer_stereo_fixed_set(PixbufRenderer *pr, gint width, gint height, gint x1, gint y1, gint x2, gint y2)
2732 {
2733         pr->stereo_fixed_width = width;
2734         pr->stereo_fixed_height = height;
2735         pr->stereo_fixed_x_left = x1;
2736         pr->stereo_fixed_y_left = y1;
2737         pr->stereo_fixed_x_right = x2;
2738         pr->stereo_fixed_y_right = y2;
2739 }
2740
2741 gint pixbuf_renderer_stereo_get(PixbufRenderer *pr)
2742 {
2743         return pr->stereo_mode;
2744 }
2745
2746 static void pr_stereo_temp_disable(PixbufRenderer *pr, gboolean disable)
2747 {
2748         if (pr->stereo_temp_disable == disable) return;
2749         pr->stereo_temp_disable = disable;
2750         if (disable)
2751                 {
2752                 if (!pr->renderer) pr->renderer = pr_backend_renderer_new(pr);
2753                 pr->renderer->stereo_set(pr->renderer, PR_STEREO_NONE);
2754                 if (pr->renderer2) pr->renderer2->free(pr->renderer2);
2755                 pr->renderer2 = NULL;
2756                 pr->aspect_ratio = 1.0;
2757                 }
2758         else
2759                 {
2760                 pr_stereo_set(pr);
2761                 }
2762         pr_size_sync(pr, pr->window_width, pr->window_height); /* recalculate new viewport */
2763 }
2764
2765 gboolean pixbuf_renderer_get_pixel_colors(PixbufRenderer *pr, gint x_pixel, gint y_pixel,
2766                                           gint *r_mouse, gint *g_mouse, gint *b_mouse)
2767 {
2768         GdkPixbuf *pb = pr->pixbuf;
2769         gint p_alpha, prs;
2770         guchar *p_pix, *pp;
2771         gint map_x, map_y, map_w, map_h;
2772
2773         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
2774         g_return_val_if_fail(r_mouse != NULL && g_mouse != NULL && b_mouse != NULL, FALSE);
2775
2776         if (!pr->pixbuf && !pr->source_tiles_enabled)
2777                 {
2778                 *r_mouse = -1;
2779                 *g_mouse = -1;
2780                 *b_mouse = -1;
2781                 return FALSE;
2782                 }
2783
2784         if (!pb) return FALSE;
2785
2786         pr_tile_region_map_orientation(pr->orientation,
2787                                         x_pixel, y_pixel,
2788                                         pr->image_width, pr->image_height,
2789                                         1, 1, /*single pixel */
2790                                         &map_x, &map_y,
2791                                         &map_w, &map_h);
2792
2793         if (map_x < 0 || map_x > gdk_pixbuf_get_width(pr->pixbuf) - 1) return  FALSE;
2794         if (map_y < 0 || map_y > gdk_pixbuf_get_height(pr->pixbuf) - 1) return  FALSE;
2795
2796         p_alpha = gdk_pixbuf_get_has_alpha(pb);
2797         prs = gdk_pixbuf_get_rowstride(pb);
2798         p_pix = gdk_pixbuf_get_pixels(pb);
2799
2800         pp = p_pix + map_y * prs + (map_x * (p_alpha ? 4 : 3));
2801         *r_mouse = *pp;
2802         pp++;
2803         *g_mouse = *pp;
2804         pp++;
2805         *b_mouse = *pp;
2806
2807         return TRUE;
2808 }
2809
2810 gboolean pixbuf_renderer_get_mouse_position(PixbufRenderer *pr, gint *x_pixel_return, gint *y_pixel_return)
2811 {
2812         gint x_pixel, y_pixel, x_pixel_clamped, y_pixel_clamped;
2813
2814         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
2815         g_return_val_if_fail(x_pixel_return != NULL && y_pixel_return != NULL, FALSE);
2816
2817         if (!pr->pixbuf && !pr->source_tiles_enabled)
2818                 {
2819                 *x_pixel_return = -1;
2820                 *y_pixel_return = -1;
2821                 return FALSE;
2822                 }
2823
2824         x_pixel = floor((gdouble)(pr->x_mouse - pr->x_offset + pr->x_scroll) / pr->scale);
2825         y_pixel = floor((gdouble)(pr->y_mouse - pr->y_offset + pr->y_scroll) / pr->scale / pr->aspect_ratio);
2826         x_pixel_clamped = CLAMP(x_pixel, 0, pr->image_width - 1);
2827         y_pixel_clamped = CLAMP(y_pixel, 0, pr->image_height - 1);
2828
2829         if(x_pixel != x_pixel_clamped || y_pixel != y_pixel_clamped)
2830                 {
2831                 /* mouse is not on pr */
2832                 x_pixel = y_pixel = -1;
2833                 }
2834
2835         *x_pixel_return = x_pixel;
2836         *y_pixel_return = y_pixel;
2837
2838         return TRUE;
2839 }
2840
2841 gboolean pixbuf_renderer_get_image_size(PixbufRenderer *pr, gint *width, gint *height)
2842 {
2843         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
2844         g_return_val_if_fail(width != NULL && height != NULL, FALSE);
2845
2846         if (!pr->pixbuf && !pr->source_tiles_enabled && (!pr->image_width || !pr->image_height))
2847                 {
2848                 *width = 0;
2849                 *height = 0;
2850                 return FALSE;
2851                 }
2852
2853         *width = pr->image_width;
2854         *height = pr->image_height;
2855         return TRUE;
2856 }
2857
2858 gboolean pixbuf_renderer_get_scaled_size(PixbufRenderer *pr, gint *width, gint *height)
2859 {
2860         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
2861         g_return_val_if_fail(width != NULL && height != NULL, FALSE);
2862
2863         if (!pr->pixbuf && !pr->source_tiles_enabled && (!pr->image_width || !pr->image_height))
2864                 {
2865                 *width = 0;
2866                 *height = 0;
2867                 return FALSE;
2868                 }
2869
2870         *width = pr->width;
2871         *height = pr->height;
2872         return TRUE;
2873 }
2874
2875 gboolean pixbuf_renderer_get_visible_rect(PixbufRenderer *pr, GdkRectangle *rect)
2876 {
2877         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
2878         g_return_val_if_fail(rect != NULL, FALSE);
2879
2880         if ((!pr->pixbuf && !pr->source_tiles_enabled) ||
2881             !pr->scale)
2882                 {
2883                 rect->x = 0;
2884                 rect->y = 0;
2885                 rect->width = 0;
2886                 rect->height = 0;
2887                 return FALSE;
2888                 }
2889
2890         rect->x = (gint)((gdouble)pr->x_scroll / pr->scale);
2891         rect->y = (gint)((gdouble)pr->y_scroll / pr->scale / pr->aspect_ratio);
2892         rect->width = (gint)((gdouble)pr->vis_width / pr->scale);
2893         rect->height = (gint)((gdouble)pr->vis_height / pr->scale / pr->aspect_ratio);
2894         return TRUE;
2895 }
2896
2897 gboolean pixbuf_renderer_get_virtual_rect(PixbufRenderer *pr, GdkRectangle *rect)
2898 {
2899         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
2900         g_return_val_if_fail(rect != NULL, FALSE);
2901
2902         if ((!pr->pixbuf && !pr->source_tiles_enabled))
2903                 {
2904                 rect->x = 0;
2905                 rect->y = 0;
2906                 rect->width = 0;
2907                 rect->height = 0;
2908                 return FALSE;
2909                 }
2910
2911         rect->x = pr->x_scroll;
2912         rect->y = pr->y_scroll;
2913         rect->width = pr->vis_width;
2914         rect->height = pr->vis_height;
2915         return TRUE;
2916 }
2917
2918 void pixbuf_renderer_set_size_early(PixbufRenderer *pr, guint width, guint height)
2919 {
2920 #if 0
2921         /* FIXME: this function does not consider the image orientation,
2922         so it probably only breaks something */
2923         gdouble zoom;
2924         gint w, h;
2925
2926         zoom = pixbuf_renderer_zoom_get(pr);
2927         pr->image_width = width;
2928         pr->image_height = height;
2929
2930         pr_zoom_clamp(pr, zoom, PR_ZOOM_FORCE, NULL);
2931
2932         //w = width;
2933         //h = height;
2934
2935         //pr->width = width;
2936         //pr->height = height;
2937 #endif
2938 }
2939
2940 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */