src/pixbuf-renderer.c

   1 /*
   2  * Geeqie
   3  * (C) 2006 John Ellis
   4  *
   5  * Author: John Ellis
   6  *
   7  * This software is released under the GNU General Public License (GNU GPL).
   8  * Please read the included file COPYING for more information.
   9  * This software comes with no warranty of any kind, use at your own risk!
  10  */
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <math.h>
  15 #include "pixbuf-renderer.h"
  16 #include "intl.h"
  17
  18 #include <gtk/gtk.h>
  19
  20
  21 /* comment this out if not using this from within Geeqie
  22  * defining GQVIEW_BUILD does these things:
  23  *   - Sets the shift-click scroller pixbuf to a nice icon instead of a black box
  24  */
  25 #define GQVIEW_BUILD 1
  26
  27
  28 #ifdef GQVIEW_BUILD
  29         #include "pixbuf_util.h"
  30 #endif
  31
  32
  33 /* size to use when breaking up image pane for rendering */
  34 #define PR_TILE_SIZE 128
  35
  36 /* default size of tile cache (mb) */
  37 #define PR_CACHE_SIZE_DEFAULT 8
  38
  39 /* default min and max zoom */
  40 #define PR_ZOOM_MIN -32.0
  41 #define PR_ZOOM_MAX 32.0
  42
  43 /* distance to drag mouse to disable image flip */
  44 #define PR_DRAG_SCROLL_THRESHHOLD 4
  45
  46 /* increase pan rate when holding down shift */
  47 #define PR_PAN_SHIFT_MULTIPLIER 6
  48
  49 /* scroller config */
  50 #define PR_SCROLLER_UPDATES_PER_SEC 30
  51 #define PR_SCROLLER_DEAD_ZONE 6
  52
  53 /* alpha channel checkerboard background (same as gimp) */
  54 #define PR_ALPHA_CHECK1 0x00999999
  55 #define PR_ALPHA_CHECK2 0x00666666
  56 #define PR_ALPHA_CHECK_SIZE 16
  57
  58 /* when scaling image to below this size, use nearest pixel for scaling
  59  * (below about 4, the other scale types become slow generating their conversion tables)
  60  */
  61 #define PR_MIN_SCALE_SIZE 8
  62
  63
  64 typedef enum {
  65         TILE_RENDER_NONE = 0,   /* do nothing */
  66         TILE_RENDER_AREA,       /* render an area of the tile */
  67         TILE_RENDER_ALL         /* render the whole tile */
  68 } ImageTileRenderType;
  69
  70 typedef struct _ImageTile ImageTile;
  71 typedef struct _QueueData QueueData;
  72
  73 struct _ImageTile
  74 {
  75         GdkPixmap *pixmap;      /* off screen buffer */
  76         GdkPixbuf *pixbuf;      /* pixbuf area for zooming */
  77         gint x;                 /* x offset into image */
  78         gint y;                 /* y offset into image */
  79         gint w;                 /* width that is visible (may be less if at edge of image) */
  80         gint h;                 /* height '' */
  81
  82         gboolean blank;
  83
  84 /* render_todo: (explanation)
  85         NONE    do nothing
  86         AREA    render area of tile, usually only used when loading an image
  87                 note: will jump to an ALL if render_done is not ALL.
  88         ALL     render entire tile, if never done before w/ ALL, for expose events *only*
  89 */
  90
  91         ImageTileRenderType render_todo;        /* what to do (see above) */
  92         ImageTileRenderType render_done;        /* highest that has been done before on tile */
  93
  94         QueueData *qd;
  95         QueueData *qd2;
  96
  97         guint size;             /* est. memory used by pixmap and pixbuf */
  98 };
  99
 100 struct _QueueData
 101 {
 102         ImageTile *it;
 103         gint x;
 104         gint y;
 105         gint w;
 106         gint h;
 107         gboolean new_data;
 108 };
 109
 110 typedef struct _SourceTile SourceTile;
 111 struct _SourceTile
 112 {
 113         gint x;
 114         gint y;
 115         GdkPixbuf *pixbuf;
 116         gboolean blank;
 117 };
 118
 119 typedef struct _OverlayData OverlayData;
 120 struct _OverlayData
 121 {
 122         gint id;
 123
 124         GdkPixbuf *pixbuf;
 125         GdkWindow *window;
 126
 127         gint x;
 128         gint y;
 129         gint relative;  /* x,y coordinates are relative, negative values start bottom right */
 130
 131         gint always;    /* hide temporarily when scrolling (not yet implemented) */
 132 };
 133
 134 enum {
 135         SIGNAL_ZOOM = 0,
 136         SIGNAL_CLICKED,
 137         SIGNAL_SCROLL_NOTIFY,
 138         SIGNAL_RENDER_COMPLETE,
 139         SIGNAL_DRAG,
 140         SIGNAL_COUNT
 141 };
 142
 143 enum {
 144         PROP_0,
 145         PROP_ZOOM_MIN,
 146         PROP_ZOOM_MAX,
 147         PROP_ZOOM_QUALITY,
 148         PROP_ZOOM_2PASS,
 149         PROP_ZOOM_EXPAND,
 150         PROP_DITHER_QUALITY,
 151         PROP_SCROLL_RESET,
 152         PROP_DELAY_FLIP,
 153         PROP_LOADING,
 154         PROP_COMPLETE,
 155         PROP_CACHE_SIZE_DISPLAY,
 156         PROP_CACHE_SIZE_TILES,
 157         PROP_WINDOW_FIT,
 158         PROP_WINDOW_LIMIT,
 159         PROP_WINDOW_LIMIT_VALUE
 160 };
 161
 162
 163
 164 static guint signals[SIGNAL_COUNT] = { 0 };
 165 static GtkEventBoxClass *parent_class = NULL;
 166
 167
 168
 169 static void pixbuf_renderer_class_init(PixbufRendererClass *class);
 170 static void pixbuf_renderer_init(PixbufRenderer *pr);
 171 static void pixbuf_renderer_finalize(GObject *object);
 172 static void pixbuf_renderer_set_property(GObject *object, guint prop_id,
 173                                          const GValue *value, GParamSpec *pspec);
 174 static void pixbuf_renderer_get_property(GObject *object, guint prop_id,
 175                                          GValue *value, GParamSpec *pspec);
 176 static gint pixbuf_renderer_expose(GtkWidget *widget, GdkEventExpose *event);
 177
 178 static void pr_render_complete_signal(PixbufRenderer *pr);
 179
 180 static void pr_overlay_list_clear(PixbufRenderer *pr);
 181 static void pr_scroller_timer_set(PixbufRenderer *pr, gint start);
 182 static void pr_border_draw(PixbufRenderer *pr, gint x, gint y, gint w, gint h);
 183
 184
 185 static void pr_source_tile_free_all(PixbufRenderer *pr);
 186 static void pr_tile_free_all(PixbufRenderer *pr);
 187 static void pr_tile_invalidate_region(PixbufRenderer *pr, gint x, gint y, gint w, gint h);
 188 static gint pr_tile_is_visible(PixbufRenderer *pr, ImageTile *it);
 189 static void pr_queue_clear(PixbufRenderer *pr);
 190 static void pr_queue_merge(QueueData *parent, QueueData *qd);
 191 static void pr_queue(PixbufRenderer *pr, gint x, gint y, gint w, gint h,
 192                      gint clamp, ImageTileRenderType render, gint new_data, gint only_existing);
 193
 194 static void pr_redraw(PixbufRenderer *pr, gint new_data);
 195
 196 static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
 197                          gint force, gint new,
 198                          gint center_point, gint px, gint py);
 199
 200 static void pr_signals_connect(PixbufRenderer *pr);
 201 static void pr_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data);
 202 static void pixbuf_renderer_paint(PixbufRenderer *pr, GdkRectangle *area);
 203
 204
 205 /*
 206  *-------------------------------------------------------------------
 207  * Pixbuf Renderer object
 208  *-------------------------------------------------------------------
 209  */
 210
 211 GType pixbuf_renderer_get_type(void)
 212 {
 213         static GType pixbuf_renderer_type = 0;
 214
 215         if (!pixbuf_renderer_type)
 216                 {
 217                 static const GTypeInfo pixbuf_renderer_info =
 218                         {
 219                         sizeof(PixbufRendererClass),
 220                         NULL,           /* base_init */
 221                         NULL,           /* base_finalize */
 222                         (GClassInitFunc)pixbuf_renderer_class_init,
 223                         NULL,           /* class_finalize */
 224                         NULL,           /* class_data */
 225                         sizeof(PixbufRenderer),
 226                         0,              /* n_preallocs */
 227                         (GInstanceInitFunc)pixbuf_renderer_init,
 228                         };
 229
 230                 pixbuf_renderer_type = g_type_register_static(GTK_TYPE_EVENT_BOX, "PixbufRenderer",
 231                                                               &pixbuf_renderer_info, 0);
 232                 }
 233
 234         return pixbuf_renderer_type;
 235 }
 236
 237 static void pixbuf_renderer_class_init(PixbufRendererClass *class)
 238 {
 239         GObjectClass *gobject_class = G_OBJECT_CLASS(class);
 240         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(class);
 241
 242         parent_class = g_type_class_peek_parent(class);
 243
 244         gobject_class->set_property = pixbuf_renderer_set_property;
 245         gobject_class->get_property = pixbuf_renderer_get_property;
 246
 247         gobject_class->finalize = pixbuf_renderer_finalize;
 248
 249         widget_class->expose_event = pixbuf_renderer_expose;
 250
 251         g_object_class_install_property(gobject_class,
 252                                         PROP_ZOOM_MIN,
 253                                         g_param_spec_double("zoom_min",
 254                                                             "Zoom minimum",
 255                                                             NULL,
 256                                                             -1000.0,
 257                                                             1000.0,
 258                                                             PR_ZOOM_MIN,
 259                                                             G_PARAM_READABLE | G_PARAM_WRITABLE));
 260
 261         g_object_class_install_property(gobject_class,
 262                                         PROP_ZOOM_MAX,
 263                                         g_param_spec_double("zoom_max",
 264                                                             "Zoom maximum",
 265                                                             NULL,
 266                                                             -1000.0,
 267                                                             1000.0,
 268                                                             PR_ZOOM_MIN,
 269                                                             G_PARAM_READABLE | G_PARAM_WRITABLE));
 270
 271         g_object_class_install_property(gobject_class,
 272                                         PROP_ZOOM_QUALITY,
 273                                         g_param_spec_uint("zoom_quality",
 274                                                           "Zoom quality",
 275                                                           NULL,
 276                                                           GDK_INTERP_NEAREST,
 277                                                           GDK_INTERP_HYPER,
 278                                                           GDK_INTERP_BILINEAR,
 279                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 280
 281         g_object_class_install_property(gobject_class,
 282                                         PROP_ZOOM_2PASS,
 283                                         g_param_spec_boolean("zoom_2pass",
 284                                                              "2 pass zoom",
 285                                                              NULL,
 286                                                              TRUE,
 287                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 288
 289         g_object_class_install_property(gobject_class,
 290                                         PROP_ZOOM_EXPAND,
 291                                         g_param_spec_boolean("zoom_expand",
 292                                                              "Expand image in autozoom.",
 293                                                              NULL,
 294                                                              FALSE,
 295                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 296
 297         g_object_class_install_property(gobject_class,
 298                                         PROP_DITHER_QUALITY,
 299                                         g_param_spec_uint("dither_quality",
 300                                                           "Dither quality",
 301                                                           NULL,
 302                                                           GDK_RGB_DITHER_NONE,
 303                                                           GDK_RGB_DITHER_MAX,
 304                                                           GDK_RGB_DITHER_NORMAL,
 305                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 306
 307         g_object_class_install_property(gobject_class,
 308                                         PROP_SCROLL_RESET,
 309                                         g_param_spec_uint("scroll_reset",
 310                                                           "New image scroll reset",
 311                                                           NULL,
 312                                                           PR_SCROLL_RESET_TOPLEFT,
 313                                                           PR_SCROLL_RESET_NOCHANGE,
 314                                                           PR_SCROLL_RESET_TOPLEFT,
 315                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 316
 317         g_object_class_install_property(gobject_class,
 318                                         PROP_DELAY_FLIP,
 319                                         g_param_spec_boolean("delay_flip",
 320                                                              "Delay image update",
 321                                                              NULL,
 322                                                              FALSE,
 323                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 324
 325         g_object_class_install_property(gobject_class,
 326                                         PROP_LOADING,
 327                                         g_param_spec_boolean("loading",
 328                                                              "Image actively loading",
 329                                                              NULL,
 330                                                              FALSE,
 331                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 332
 333         g_object_class_install_property(gobject_class,
 334                                         PROP_COMPLETE,
 335                                         g_param_spec_boolean("complete",
 336                                                              "Image rendering complete",
 337                                                              NULL,
 338                                                              FALSE,
 339                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 340
 341         g_object_class_install_property(gobject_class,
 342                                         PROP_CACHE_SIZE_DISPLAY,
 343                                         g_param_spec_uint("cache_display",
 344                                                           "Display cache size MB",
 345                                                           NULL,
 346                                                           0,
 347                                                           128,
 348                                                           PR_CACHE_SIZE_DEFAULT,
 349                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 350
 351         g_object_class_install_property(gobject_class,
 352                                         PROP_CACHE_SIZE_TILES,
 353                                         g_param_spec_uint("cache_tiles",
 354                                                           "Tile cache count",
 355                                                           "Number of tiles to retain in memory at any one time.",
 356                                                           0,
 357                                                           256,
 358                                                           PR_CACHE_SIZE_DEFAULT,
 359                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 360
 361         g_object_class_install_property(gobject_class,
 362                                         PROP_WINDOW_FIT,
 363                                         g_param_spec_boolean("window_fit",
 364                                                              "Fit window to image size",
 365                                                              NULL,
 366                                                              FALSE,
 367                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 368
 369         g_object_class_install_property(gobject_class,
 370                                         PROP_WINDOW_LIMIT,
 371                                         g_param_spec_boolean("window_limit",
 372                                                              "Limit size of parent window",
 373                                                              NULL,
 374                                                              FALSE,
 375                                                              G_PARAM_READABLE | G_PARAM_WRITABLE));
 376
 377         g_object_class_install_property(gobject_class,
 378                                         PROP_WINDOW_LIMIT_VALUE,
 379                                         g_param_spec_uint("window_limit_value",
 380                                                           "Size limit of parent window",
 381                                                           NULL,
 382                                                           10,
 383                                                           150,
 384                                                           100,
 385                                                           G_PARAM_READABLE | G_PARAM_WRITABLE));
 386
 387         signals[SIGNAL_ZOOM] =
 388                 g_signal_new("zoom",
 389                              G_OBJECT_CLASS_TYPE(gobject_class),
 390                              G_SIGNAL_RUN_LAST,
 391                              G_STRUCT_OFFSET(PixbufRendererClass, zoom),
 392                              NULL, NULL,
 393                              g_cclosure_marshal_VOID__DOUBLE,
 394                              G_TYPE_NONE, 1,
 395                              G_TYPE_DOUBLE);
 396
 397         signals[SIGNAL_CLICKED] =
 398                 g_signal_new("clicked",
 399                              G_OBJECT_CLASS_TYPE(gobject_class),
 400                              G_SIGNAL_RUN_LAST,
 401                              G_STRUCT_OFFSET(PixbufRendererClass, clicked),
 402                              NULL, NULL,
 403                              g_cclosure_marshal_VOID__BOXED,
 404                              G_TYPE_NONE, 1,
 405                              GDK_TYPE_EVENT);
 406
 407         signals[SIGNAL_SCROLL_NOTIFY] =
 408                 g_signal_new("scroll-notify",
 409                              G_OBJECT_CLASS_TYPE(gobject_class),
 410                              G_SIGNAL_RUN_LAST,
 411                              G_STRUCT_OFFSET(PixbufRendererClass, scroll_notify),
 412                              NULL, NULL,
 413                              g_cclosure_marshal_VOID__VOID,
 414                              G_TYPE_NONE, 0);
 415
 416         signals[SIGNAL_RENDER_COMPLETE] =
 417                 g_signal_new("render-complete",
 418                              G_OBJECT_CLASS_TYPE(gobject_class),
 419                              G_SIGNAL_RUN_LAST,
 420                              G_STRUCT_OFFSET(PixbufRendererClass, render_complete),
 421                              NULL, NULL,
 422                              g_cclosure_marshal_VOID__VOID,
 423                              G_TYPE_NONE, 0);
 424
 425         signals[SIGNAL_DRAG] =
 426                 g_signal_new("drag",
 427                              G_OBJECT_CLASS_TYPE(gobject_class),
 428                              G_SIGNAL_RUN_LAST,
 429                              G_STRUCT_OFFSET(PixbufRendererClass, drag),
 430                              NULL, NULL,
 431                              g_cclosure_marshal_VOID__BOXED,
 432                              G_TYPE_NONE, 1,
 433                              GDK_TYPE_EVENT);
 434 }
 435
 436 static void pixbuf_renderer_init(PixbufRenderer *pr)
 437 {
 438         GtkWidget *box;
 439
 440         box = GTK_WIDGET(pr);
 441
 442         pr->zoom_min = PR_ZOOM_MIN;
 443         pr->zoom_max = PR_ZOOM_MAX;
 444         pr->zoom_quality = GDK_INTERP_BILINEAR;
 445         pr->zoom_2pass = FALSE;
 446
 447         pr->zoom = 1.0;
 448         pr->scale = 1.0;
 449
 450         pr->dither_quality = GDK_RGB_DITHER_NORMAL;
 451
 452         pr->scroll_reset = PR_SCROLL_RESET_TOPLEFT;
 453
 454         pr->draw_idle_id = -1;
 455
 456         pr->tile_width = PR_TILE_SIZE;
 457         pr->tile_height = PR_TILE_SIZE;
 458
 459         pr->tiles = NULL;
 460         pr->tile_cache_size = 0;
 461
 462         pr->tile_cache_max = PR_CACHE_SIZE_DEFAULT;
 463
 464         pr->scroller_id = -1;
 465         pr->scroller_overlay = -1;
 466
 467         pr->source_tiles_enabled = FALSE;
 468         pr->source_tiles = NULL;
 469
 470         gtk_widget_set_double_buffered(box, FALSE);
 471         g_signal_connect_after(G_OBJECT(box), "size_allocate",
 472                                G_CALLBACK(pr_size_cb), pr);
 473
 474         pr_signals_connect(pr);
 475 }
 476
 477 static void pixbuf_renderer_finalize(GObject *object)
 478 {
 479         PixbufRenderer *pr;
 480
 481         pr = PIXBUF_RENDERER(object);
 482
 483         pr_queue_clear(pr);
 484         pr_tile_free_all(pr);
 485
 486         if (pr->pixbuf) g_object_unref(pr->pixbuf);
 487
 488         pr_scroller_timer_set(pr, FALSE);
 489         pr_overlay_list_clear(pr);
 490
 491         pr_source_tile_free_all(pr);
 492 }
 493
 494 PixbufRenderer* pixbuf_renderer_new(void)
 495 {
 496         return g_object_new(TYPE_PIXBUF_RENDERER, NULL);
 497 }
 498
 499 static void pixbuf_renderer_set_property(GObject *object, guint prop_id,
 500                                          const GValue *value, GParamSpec *pspec)
 501 {
 502         PixbufRenderer *pr;
 503
 504         pr = PIXBUF_RENDERER(object);
 505
 506         switch (prop_id)
 507                 {
 508                 case PROP_ZOOM_MIN:
 509                         pr->zoom_min = g_value_get_double(value);
 510                         break;
 511                 case PROP_ZOOM_MAX:
 512                         pr->zoom_max = g_value_get_double(value);
 513                         break;
 514                 case PROP_ZOOM_QUALITY:
 515                         pr->zoom_quality = g_value_get_uint(value);
 516                         break;
 517                 case PROP_ZOOM_2PASS:
 518                         pr->zoom_2pass = g_value_get_boolean(value);
 519                         break;
 520                 case PROP_ZOOM_EXPAND:
 521                         pr->zoom_expand = g_value_get_boolean(value);
 522                         break;
 523                 case PROP_DITHER_QUALITY:
 524                         pr->dither_quality = g_value_get_uint(value);
 525                         break;
 526                 case PROP_SCROLL_RESET:
 527                         pr->scroll_reset = g_value_get_uint(value);
 528                         break;
 529                 case PROP_DELAY_FLIP:
 530                         pr->delay_flip = g_value_get_boolean(value);
 531                         break;
 532                 case PROP_LOADING:
 533                         pr->loading = g_value_get_boolean(value);
 534                         break;
 535                 case PROP_COMPLETE:
 536                         pr->complete = g_value_get_boolean(value);
 537                         break;
 538                 case PROP_CACHE_SIZE_DISPLAY:
 539                         pr->tile_cache_max = g_value_get_uint(value);
 540                         break;
 541                 case PROP_CACHE_SIZE_TILES:
 542                         pr->source_tiles_cache_size = g_value_get_uint(value);
 543                         break;
 544                 case PROP_WINDOW_FIT:
 545                         pr->window_fit = g_value_get_boolean(value);
 546                         break;
 547                 case PROP_WINDOW_LIMIT:
 548                         pr->window_limit = g_value_get_boolean(value);
 549                         break;
 550                 case PROP_WINDOW_LIMIT_VALUE:
 551                         pr->window_limit_size = g_value_get_uint(value);
 552                         break;
 553                 default:
 554                         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
 555                         break;
 556                 }
 557 }
 558
 559 static void pixbuf_renderer_get_property(GObject *object, guint prop_id,
 560                                          GValue *value, GParamSpec *pspec)
 561 {
 562         PixbufRenderer *pr;
 563
 564         pr = PIXBUF_RENDERER(object);
 565
 566         switch (prop_id)
 567                 {
 568                 case PROP_ZOOM_MIN:
 569                         g_value_set_double(value, pr->zoom_min);
 570                         break;
 571                 case PROP_ZOOM_MAX:
 572                         g_value_set_double(value, pr->zoom_max);
 573                         break;
 574                 case PROP_ZOOM_QUALITY:
 575                         g_value_set_uint(value, pr->zoom_quality);
 576                         break;
 577                 case PROP_ZOOM_2PASS:
 578                         g_value_set_boolean(value, pr->zoom_2pass);
 579                         break;
 580                 case PROP_ZOOM_EXPAND:
 581                         g_value_set_boolean(value, pr->zoom_expand);
 582                         break;
 583                 case PROP_DITHER_QUALITY:
 584                         g_value_set_uint(value, pr->dither_quality);
 585                         break;
 586                 case PROP_SCROLL_RESET:
 587                         g_value_set_uint(value, pr->scroll_reset);
 588                         break;
 589                 case PROP_DELAY_FLIP:
 590                         g_value_set_boolean(value, pr->delay_flip);
 591                         break;
 592                 case PROP_LOADING:
 593                         g_value_set_boolean(value, pr->loading);
 594                         break;
 595                 case PROP_COMPLETE:
 596                         g_value_set_boolean(value, pr->complete);
 597                         break;
 598                 case PROP_CACHE_SIZE_DISPLAY:
 599                         g_value_set_uint(value, pr->tile_cache_max);
 600                         break;
 601                 case PROP_CACHE_SIZE_TILES:
 602                         g_value_set_uint(value, pr->source_tiles_cache_size);
 603                         break;
 604                 case PROP_WINDOW_FIT:
 605                         g_value_set_boolean(value, pr->window_fit);
 606                         break;
 607                 case PROP_WINDOW_LIMIT:
 608                         g_value_set_boolean(value, pr->window_limit);
 609                         break;
 610                 case PROP_WINDOW_LIMIT_VALUE:
 611                         g_value_set_uint(value, pr->window_limit_size);
 612                         break;
 613                 default:
 614                         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
 615                         break;
 616                 }
 617 }
 618
 619 static gint pixbuf_renderer_expose(GtkWidget *widget, GdkEventExpose *event)
 620 {
 621         if (GTK_WIDGET_DRAWABLE(widget))
 622                 {
 623                 if (!GTK_WIDGET_NO_WINDOW(widget))
 624                         {
 625                         if (event->window != widget->window)
 626                                 {
 627                                 GdkRectangle area;
 628
 629                                 gdk_window_get_position(event->window, &area.x, &area.y);
 630
 631                                 area.x += event->area.x;
 632                                 area.y += event->area.y;
 633                                 area.width = event->area.width;
 634                                 area.height = event->area.height;
 635                                 pixbuf_renderer_paint(PIXBUF_RENDERER(widget), &area);
 636                                 }
 637                         else
 638                                 {
 639                                 pixbuf_renderer_paint(PIXBUF_RENDERER(widget), &event->area);
 640                                 }
 641                         }
 642                 }
 643
 644         return FALSE;
 645 }
 646
 647 /*
 648  *-------------------------------------------------------------------
 649  * misc utilities
 650  *-------------------------------------------------------------------
 651  */
 652
 653 static void widget_set_cursor(GtkWidget *widget, gint icon)
 654 {
 655         GdkCursor *cursor;
 656
 657         if (!widget->window) return;
 658
 659         if (icon == -1)
 660                 {
 661                 cursor = NULL;
 662                 }
 663         else
 664                 {
 665                 cursor = gdk_cursor_new (icon);
 666                 }
 667
 668         gdk_window_set_cursor(widget->window, cursor);
 669
 670         if (cursor) gdk_cursor_unref(cursor);
 671 }
 672
 673 static gint pixmap_calc_size(GdkPixmap *pixmap)
 674 {
 675         gint w, h, d;
 676
 677         d = gdk_drawable_get_depth(pixmap);
 678         gdk_drawable_get_size(pixmap, &w, &h);
 679         return w * h * (d / 8);
 680 }
 681
 682 static gint pr_clip_region(gint x, gint y, gint w, gint h,
 683                            gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 684                            gint *rx, gint *ry, gint *rw, gint *rh)
 685 {
 686         if (clip_x + clip_w <= x ||
 687             clip_x >= x + w ||
 688             clip_y + clip_h <= y ||
 689             clip_y >= y + h)
 690                 {
 691                 return FALSE;
 692                 }
 693
 694         *rx = MAX(x, clip_x);
 695         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 696
 697         *ry = MAX(y, clip_y);
 698         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 699
 700         return TRUE;
 701 }
 702
 703 static gint pr_parent_window_sizable(PixbufRenderer *pr)
 704 {
 705         GdkWindowState state;
 706
 707         if (!pr->parent_window) return FALSE;
 708         if (!pr->window_fit) return FALSE;
 709         if (!GTK_WIDGET(pr)->window) return FALSE;
 710
 711         if (!pr->parent_window->window) return FALSE;
 712         state = gdk_window_get_state(pr->parent_window->window);
 713         if (state & GDK_WINDOW_STATE_MAXIMIZED) return FALSE;
 714
 715         return TRUE;
 716 }
 717
 718 static gint pr_parent_window_resize(PixbufRenderer *pr, gint w, gint h)
 719 {
 720         GtkWidget *widget;
 721         GtkWidget *parent;
 722         gint ww, wh;
 723
 724         if (!pr_parent_window_sizable(pr)) return FALSE;
 725
 726         if (pr->window_limit)
 727                 {
 728                 gint sw = gdk_screen_width() * pr->window_limit_size / 100;
 729                 gint sh = gdk_screen_height() * pr->window_limit_size / 100;
 730
 731                 if (w > sw) w = sw;
 732                 if (h > sh) h = sh;
 733                 }
 734
 735         widget = GTK_WIDGET(pr);
 736         parent = GTK_WIDGET(pr->parent_window);
 737
 738         w += (parent->allocation.width - widget->allocation.width);
 739         h += (parent->allocation.height - widget->allocation.height);
 740
 741         gdk_drawable_get_size(parent->window, &ww, &wh);
 742         if (w == ww && h == wh) return FALSE;
 743
 744         gdk_window_resize(parent->window, w, h);
 745
 746         return TRUE;
 747 }
 748
 749 void pixbuf_renderer_set_parent(PixbufRenderer *pr, GtkWindow *window)
 750 {
 751         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
 752         g_return_if_fail(window == NULL || GTK_IS_WINDOW(window));
 753
 754         pr->parent_window = GTK_WIDGET(window);
 755 }
 756
 757 GtkWindow *pixbuf_renderer_get_parent(PixbufRenderer *pr)
 758 {
 759         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), NULL);
 760
 761         return GTK_WINDOW(pr->parent_window);
 762 }
 763
 764
 765 /*
 766  *-------------------------------------------------------------------
 767  * overlays
 768  *-------------------------------------------------------------------
 769  */
 770
 771 static void pr_overlay_get_position(PixbufRenderer *pr, OverlayData *od,
 772                                     gint *x, gint *y, gint *w, gint *h)
 773 {
 774         gint px, py, pw, ph;
 775
 776         pw = gdk_pixbuf_get_width(od->pixbuf);
 777         ph = gdk_pixbuf_get_height(od->pixbuf);
 778         px = od->x;
 779         py = od->y;
 780
 781         if (od->relative)
 782                 {
 783                 if (px < 0) px = pr->window_width - pw + px;
 784                 if (py < 0) py = pr->window_height - ph + py;
 785                 }
 786
 787         if (x) *x = px;
 788         if (y) *y = py;
 789         if (w) *w = pw;
 790         if (h) *h = ph;
 791 }
 792
 793 static void pr_overlay_draw(PixbufRenderer *pr, gint x, gint y, gint w, gint h,
 794                             ImageTile *it)
 795 {
 796         GtkWidget *box;
 797         GList *work;
 798
 799         box = GTK_WIDGET(pr);
 800
 801         work = pr->overlay_list;
 802         while (work)
 803                 {
 804                 OverlayData *od;
 805                 gint px, py, pw, ph;
 806                 gint rx, ry, rw, rh;
 807
 808                 od = work->data;
 809                 work = work->next;
 810
 811                 pr_overlay_get_position(pr, od, &px, &py, &pw, &ph);
 812                 if (pr_clip_region(x, y, w, h, px, py, pw, ph, &rx, &ry, &rw, &rh))
 813                         {
 814                         if (!pr->overlay_buffer)
 815                                 {
 816                                 pr->overlay_buffer = gdk_pixmap_new(((GtkWidget *)pr)->window, pr->tile_width, pr->tile_height, -1);
 817                                 }
 818
 819                         if (it)
 820                                 {
 821                                 gdk_draw_drawable(pr->overlay_buffer, box->style->fg_gc[GTK_WIDGET_STATE(box)],
 822                                                   it->pixmap,
 823                                                   rx - (pr->x_offset + (it->x - pr->x_scroll)),
 824                                                   ry - (pr->y_offset + (it->y - pr->y_scroll)),
 825                                                   0, 0, rw, rh);
 826                                 gdk_draw_pixbuf(pr->overlay_buffer,
 827                                                 box->style->fg_gc[GTK_WIDGET_STATE(box)],
 828                                                 od->pixbuf,
 829                                                 rx - px, ry - py,
 830                                                 0, 0, rw, rh,
 831                                                 pr->dither_quality, rx, ry);
 832                                 gdk_draw_drawable(od->window, box->style->fg_gc[GTK_WIDGET_STATE(box)],
 833                                                   pr->overlay_buffer,
 834                                                   0, 0,
 835                                                   rx - px, ry - py, rw, rh);
 836                                 }
 837                         else
 838                                 {
 839                                 /* no ImageTile means region may be larger than our scratch buffer */
 840                                 gint sx, sy;
 841
 842                                 for (sx = rx; sx < rx + rw; sx += pr->tile_width)
 843                                     for(sy = ry; sy < ry + rh; sy += pr->tile_height)
 844                                         {
 845                                         gint sw, sh;
 846
 847                                         sw = MIN(rx + rw - sx, pr->tile_width);
 848                                         sh = MIN(ry + rh - sy, pr->tile_height);
 849
 850                                         gdk_draw_rectangle(pr->overlay_buffer,
 851                                                            box->style->bg_gc[GTK_WIDGET_STATE(box)], TRUE,
 852                                                            0, 0, sw, sh);
 853                                         gdk_draw_pixbuf(pr->overlay_buffer,
 854                                                         box->style->fg_gc[GTK_WIDGET_STATE(box)],
 855                                                         od->pixbuf,
 856                                                         sx - px, sy - py,
 857                                                         0, 0, sw, sh,
 858                                                         pr->dither_quality, sx, sy);
 859                                         gdk_draw_drawable(od->window, box->style->fg_gc[GTK_WIDGET_STATE(box)],
 860                                                           pr->overlay_buffer,
 861                                                           0, 0,
 862                                                           sx - px, sy - py, sw, sh);
 863                                         }
 864                                 }
 865                         }
 866                 }
 867 }
 868
 869 static void pr_overlay_queue_draw(PixbufRenderer *pr, OverlayData *od)
 870 {
 871         gint x, y, w, h;
 872
 873         pr_overlay_get_position(pr, od, &x, &y, &w, &h);
 874         pr_queue(pr, pr->x_scroll - pr->x_offset + x,
 875                  pr->y_scroll - pr->y_offset + y,
 876                  w, h,
 877                  FALSE, TILE_RENDER_ALL, FALSE, FALSE);
 878
 879         pr_border_draw(pr, x, y, w, h);
 880 }
 881
 882 static void pr_overlay_queue_all(PixbufRenderer *pr)
 883 {
 884         GList *work;
 885
 886         work = pr->overlay_list;
 887         while (work)
 888                 {
 889                 OverlayData *od = work->data;
 890                 work = work->next;
 891
 892                 pr_overlay_queue_draw(pr, od);
 893                 }
 894 }
 895
 896 static void pr_overlay_update_sizes(PixbufRenderer *pr)
 897 {
 898         GList *work;
 899
 900         work = pr->overlay_list;
 901         while (work)
 902                 {
 903                 OverlayData *od = work->data;
 904                 work = work->next;
 905
 906                 if (od->relative && od->window)
 907                         {
 908                         gint x, y, w, h;
 909
 910                         pr_overlay_get_position(pr, od, &x, &y, &w, &h);
 911                         gdk_window_move_resize(od->window, x, y, w, h);
 912                         }
 913                 }
 914 }
 915
 916 static OverlayData *pr_overlay_find(PixbufRenderer *pr, gint id)
 917 {
 918         GList *work;
 919
 920         work = pr->overlay_list;
 921         while (work)
 922                 {
 923                 OverlayData *od = work->data;
 924                 work = work->next;
 925
 926                 if (od->id == id) return od;
 927                 }
 928
 929         return NULL;
 930 }
 931
 932 gint pixbuf_renderer_overlay_add(PixbufRenderer *pr, GdkPixbuf *pixbuf, gint x, gint y,
 933                                  gint relative, gint always)
 934 {
 935         OverlayData *od;
 936         gint id;
 937         gint px, py, pw, ph;
 938         GdkWindowAttr attributes;
 939         gint attributes_mask;
 940
 941         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), -1);
 942         g_return_val_if_fail(pixbuf != NULL, -1);
 943
 944         id = 1;
 945         while (pr_overlay_find(pr, id)) id++;
 946
 947         od = g_new0(OverlayData, 1);
 948         od->id = id;
 949         od->pixbuf = pixbuf;
 950         g_object_ref(G_OBJECT(od->pixbuf));
 951         od->x = x;
 952         od->y = y;
 953         od->relative = relative;
 954         od->always = always;
 955
 956         pr_overlay_get_position(pr, od, &px, &py, &pw, &ph);
 957
 958         attributes.window_type = GDK_WINDOW_CHILD;
 959         attributes.wclass = GDK_INPUT_OUTPUT;
 960         attributes.width = pw;
 961         attributes.height = ph;
 962         attributes.event_mask = GDK_EXPOSURE_MASK;
 963         attributes_mask = 0;
 964
 965         od->window = gdk_window_new(GTK_WIDGET(pr)->window, &attributes, attributes_mask);
 966         gdk_window_set_user_data (od->window, pr);
 967         gdk_window_move(od->window, px, py);
 968         gdk_window_show(od->window);
 969
 970         pr->overlay_list = g_list_append(pr->overlay_list, od);
 971
 972         pr_overlay_queue_draw(pr, od);
 973
 974         return od->id;
 975 }
 976
 977 static void pr_overlay_free(PixbufRenderer *pr, OverlayData *od)
 978 {
 979         pr->overlay_list = g_list_remove(pr->overlay_list, od);
 980
 981         if (od->pixbuf) g_object_unref(G_OBJECT(od->pixbuf));
 982         if (od->window) gdk_window_destroy(od->window);
 983         g_free(od);
 984
 985         if (!pr->overlay_list && pr->overlay_buffer)
 986                 {
 987                 g_object_unref(pr->overlay_buffer);
 988                 pr->overlay_buffer = NULL;
 989                 }
 990 }
 991
 992 static void pr_overlay_list_clear(PixbufRenderer *pr)
 993 {
 994         while (pr->overlay_list)
 995                 {
 996                 OverlayData *od;
 997
 998                 od = pr->overlay_list->data;
 999                 pr_overlay_free(pr, od);
1000                 }
1001 }
1002
1003 void pixbuf_renderer_overlay_set(PixbufRenderer *pr, gint id, GdkPixbuf *pixbuf, gint x, gint y)
1004 {
1005         OverlayData *od;
1006
1007         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
1008
1009         od = pr_overlay_find(pr, id);
1010         if (!od) return;
1011
1012         if (pixbuf)
1013                 {
1014                 gint px, py, pw, ph;
1015
1016                 g_object_ref(G_OBJECT(pixbuf));
1017                 g_object_unref(G_OBJECT(od->pixbuf));
1018                 od->pixbuf = pixbuf;
1019
1020                 od->x = x;
1021                 od->y = y;
1022
1023                 pr_overlay_queue_draw(pr, od);
1024                 pr_overlay_get_position(pr, od, &px, &py, &pw, &ph);
1025                 gdk_window_move_resize(od->window, px, py, pw, ph);
1026                 }
1027         else
1028                 {
1029                 pr_overlay_queue_draw(pr, od);
1030                 pr_overlay_free(pr, od);
1031                 }
1032 }
1033
1034 gint pixbuf_renderer_overlay_get(PixbufRenderer *pr, gint id, GdkPixbuf **pixbuf, gint *x, gint *y)
1035 {
1036         OverlayData *od;
1037
1038         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
1039
1040         od = pr_overlay_find(pr, id);
1041         if (!od) return FALSE;
1042
1043         if (pixbuf) *pixbuf = od->pixbuf;
1044         if (x) *x = od->x;
1045         if (y) *y = od->y;
1046
1047         return TRUE;
1048 }
1049
1050 void pixbuf_renderer_overlay_remove(PixbufRenderer *pr, gint id)
1051 {
1052         pixbuf_renderer_overlay_set(pr, id, NULL, 0, 0);
1053 }
1054
1055 /*
1056  *-------------------------------------------------------------------
1057  * scroller overlay
1058  *-------------------------------------------------------------------
1059  */
1060
1061
1062 static gboolean pr_scroller_update_cb(gpointer data)
1063 {
1064         PixbufRenderer *pr = data;
1065         gint x, y;
1066         gint xinc, yinc;
1067
1068         /* this was a simple scroll by difference between scroller and mouse position,
1069          * but all this math results in a smoother result and accounts for a dead zone.
1070          */
1071
1072         if (abs(pr->scroller_xpos - pr->scroller_x) < PR_SCROLLER_DEAD_ZONE)
1073                 {
1074                 x = 0;
1075                 }
1076         else
1077                 {
1078                 gint shift = PR_SCROLLER_DEAD_ZONE / 2 * PR_SCROLLER_UPDATES_PER_SEC;
1079                 x = (pr->scroller_xpos - pr->scroller_x) / 2 * PR_SCROLLER_UPDATES_PER_SEC;
1080                 x += (x > 0) ? -shift : shift;
1081                 }
1082
1083         if (abs(pr->scroller_ypos - pr->scroller_y) < PR_SCROLLER_DEAD_ZONE)
1084                 {
1085                 y = 0;
1086                 }
1087         else
1088                 {
1089                 gint shift = PR_SCROLLER_DEAD_ZONE / 2 * PR_SCROLLER_UPDATES_PER_SEC;
1090                 y = (pr->scroller_ypos - pr->scroller_y) / 2 * PR_SCROLLER_UPDATES_PER_SEC;
1091                 y += (y > 0) ? -shift : shift;
1092                 }
1093
1094         if (abs(x) < PR_SCROLLER_DEAD_ZONE * PR_SCROLLER_UPDATES_PER_SEC)
1095                 {
1096                 xinc = x;
1097                 }
1098         else
1099                 {
1100                 xinc = pr->scroller_xinc;
1101
1102                 if (x >= 0)
1103                         {
1104                         if (xinc < 0) xinc = 0;
1105                         if (x < xinc) xinc = x;
1106                         if (x > xinc) xinc = MIN(xinc + x / PR_SCROLLER_UPDATES_PER_SEC, x);
1107                         }
1108                 else
1109                         {
1110                         if (xinc > 0) xinc = 0;
1111                         if (x > xinc) xinc = x;
1112                         if (x < xinc) xinc = MAX(xinc + x / PR_SCROLLER_UPDATES_PER_SEC, x);
1113                         }
1114                 }
1115
1116         if (abs(y) < PR_SCROLLER_DEAD_ZONE * PR_SCROLLER_UPDATES_PER_SEC)
1117                 {
1118                 yinc = y;
1119                 }
1120         else
1121                 {
1122                 yinc = pr->scroller_yinc;
1123
1124                 if (y >= 0)
1125                         {
1126                         if (yinc < 0) yinc = 0;
1127                         if (y < yinc) yinc = y;
1128                         if (y > yinc) yinc = MIN(yinc + y / PR_SCROLLER_UPDATES_PER_SEC, y);
1129                         }
1130                 else
1131                         {
1132                         if (yinc > 0) yinc = 0;
1133                         if (y > yinc) yinc = y;
1134                         if (y < yinc) yinc = MAX(yinc + y / PR_SCROLLER_UPDATES_PER_SEC, y);
1135                         }
1136                 }
1137
1138         pr->scroller_xinc = xinc;
1139         pr->scroller_yinc = yinc;
1140
1141         xinc = xinc / PR_SCROLLER_UPDATES_PER_SEC;
1142         yinc = yinc / PR_SCROLLER_UPDATES_PER_SEC;
1143
1144         pixbuf_renderer_scroll(pr, xinc, yinc);
1145
1146         return TRUE;
1147 }
1148
1149 static void pr_scroller_timer_set(PixbufRenderer *pr, gint start)
1150 {
1151         if (pr->scroller_id != -1)
1152                 {
1153                 g_source_remove(pr->scroller_id);
1154                 pr->scroller_id = -1;
1155                 }
1156
1157         if (start)
1158                 {
1159                 pr->scroller_id = g_timeout_add(1000 / PR_SCROLLER_UPDATES_PER_SEC,
1160                                                 pr_scroller_update_cb, pr);
1161                 }
1162 }
1163
1164 static void pr_scroller_start(PixbufRenderer *pr, gint x, gint y)
1165 {
1166         if (pr->scroller_overlay == -1)
1167                 {
1168                 GdkPixbuf *pixbuf;
1169                 gint w, h;
1170
1171 #ifdef GQVIEW_BUILD
1172                 pixbuf = pixbuf_inline(PIXBUF_INLINE_SCROLLER);
1173 #else
1174                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, 32, 32);
1175                 gdk_pixbuf_fill(pixbuf, 0x000000ff);
1176 #endif
1177                 w = gdk_pixbuf_get_width(pixbuf);
1178                 h = gdk_pixbuf_get_height(pixbuf);
1179
1180                 pr->scroller_overlay = pixbuf_renderer_overlay_add(pr, pixbuf, x - w / 2, y - h / 2, FALSE, TRUE);
1181                 g_object_unref(pixbuf);
1182                 }
1183
1184         pr->scroller_x = x;
1185         pr->scroller_y = y;
1186         pr->scroller_xpos = x;
1187         pr->scroller_ypos = y;
1188
1189         pr_scroller_timer_set(pr, TRUE);
1190 }
1191
1192 static void pr_scroller_stop(PixbufRenderer *pr)
1193 {
1194         if (pr->scroller_id == -1) return;
1195
1196         pixbuf_renderer_overlay_remove(pr, pr->scroller_overlay);
1197         pr->scroller_overlay = -1;
1198
1199         pr_scroller_timer_set(pr, FALSE);
1200 }
1201
1202 /*
1203  *-------------------------------------------------------------------
1204  * borders
1205  *-------------------------------------------------------------------
1206  */
1207
1208 static void pr_border_draw(PixbufRenderer *pr, gint x, gint y, gint w, gint h)
1209 {
1210         GtkWidget *box;
1211         gint rx, ry, rw, rh;
1212
1213         box = GTK_WIDGET(pr);
1214
1215         if (!box->window) return;
1216
1217         if (!pr->pixbuf && !pr->source_tiles_enabled)
1218                 {
1219                 if (pr_clip_region(x, y, w, h,
1220                                    0, 0,
1221                                    pr->window_width, pr->window_height,
1222                                    &rx, &ry, &rw, &rh))
1223                         {
1224                         gdk_window_clear_area(box->window, rx, ry, rw, rh);
1225                         pr_overlay_draw(pr, rx, ry, rw, rh, NULL);
1226                         }
1227                 return;
1228                 }
1229
1230         if (pr->vis_width < pr->window_width)
1231                 {
1232                 if (pr->x_offset > 0 &&
1233                     pr_clip_region(x, y, w, h,
1234                                    0, 0,
1235                                    pr->x_offset, pr->window_height,
1236                                    &rx, &ry, &rw, &rh))
1237                         {
1238                         gdk_window_clear_area(box->window, rx, ry, rw, rh);
1239                         pr_overlay_draw(pr, rx, ry, rw, rh, NULL);
1240                         }
1241                 if (pr->window_width - pr->vis_width - pr->x_offset > 0 &&
1242                     pr_clip_region(x, y, w, h,
1243                                    pr->x_offset + pr->vis_width, 0,
1244                                    pr->window_width - pr->vis_width - pr->x_offset, pr->window_height,
1245                                    &rx, &ry, &rw, &rh))
1246                         {
1247                         gdk_window_clear_area(box->window, rx, ry, rw, rh);
1248                         pr_overlay_draw(pr, rx, ry, rw, rh, NULL);
1249                         }
1250                 }
1251         if (pr->vis_height < pr->window_height)
1252                 {
1253                 if (pr->y_offset > 0 &&
1254                     pr_clip_region(x, y, w, h,
1255                                    pr->x_offset, 0,
1256                                    pr->vis_width, pr->y_offset,
1257                                    &rx, &ry, &rw, &rh))
1258                         {
1259                         gdk_window_clear_area(box->window, rx, ry, rw, rh);
1260                         pr_overlay_draw(pr, rx, ry, rw, rh, NULL);
1261                         }
1262                 if (pr->window_height - pr->vis_height - pr->y_offset > 0 &&
1263                     pr_clip_region(x, y, w, h,
1264                                    pr->x_offset, pr->y_offset + pr->vis_height,
1265                                    pr->vis_width, pr->window_height - pr->vis_height - pr->y_offset,
1266                                    &rx, &ry, &rw, &rh))
1267                         {
1268                         gdk_window_clear_area(box->window, rx, ry, rw, rh);
1269                         pr_overlay_draw(pr, rx, ry, rw, rh, NULL);
1270                         }
1271                 }
1272 }
1273
1274 static void pr_border_clear(PixbufRenderer *pr)
1275 {
1276         pr_border_draw(pr, 0, 0, pr->window_width, pr->window_height);
1277 }
1278
1279 void pixbuf_renderer_set_color(PixbufRenderer *pr, GdkColor *color)
1280 {
1281         GtkStyle *style;
1282         GtkWidget *widget;
1283
1284         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
1285
1286         widget = GTK_WIDGET(pr);
1287
1288         if (color) {
1289                 GdkColor *slot;
1290
1291                 style = gtk_style_copy(gtk_widget_get_style(widget));
1292                 slot = &style->bg[GTK_STATE_NORMAL];
1293
1294                 slot->red = color->red;
1295                 slot->green = color->green;
1296                 slot->blue = color->blue;
1297                 }
1298         else {
1299                 style = gtk_style_copy(gtk_widget_get_default_style());
1300         }
1301
1302         gtk_widget_set_style(widget, style);
1303
1304         if (GTK_WIDGET_VISIBLE(widget)) pr_border_clear(pr);
1305 }
1306
1307
1308 /*
1309  *-------------------------------------------------------------------
1310  * source tiles
1311  *-------------------------------------------------------------------
1312  */
1313
1314 static void pr_source_tile_free(SourceTile *st)
1315 {
1316         if (!st) return;
1317
1318         if (st->pixbuf) g_object_unref(st->pixbuf);
1319         g_free(st);
1320 }
1321
1322 static void pr_source_tile_free_all(PixbufRenderer *pr)
1323 {
1324         GList *work;
1325
1326         work = pr->source_tiles;
1327         while (work)
1328                 {
1329                 SourceTile *st;
1330
1331                 st = work->data;
1332                 work = work->next;
1333
1334                 pr_source_tile_free(st);
1335                 }
1336
1337         g_list_free(pr->source_tiles);
1338         pr->source_tiles = NULL;
1339 }
1340
1341 static void pr_source_tile_unset(PixbufRenderer *pr)
1342 {
1343         pr_source_tile_free_all(pr);
1344         pr->source_tiles_enabled = FALSE;
1345 }
1346
1347 static gint pr_source_tile_visible(PixbufRenderer *pr, SourceTile *st)
1348 {
1349         gint x1, y1, x2, y2;
1350
1351         if (!st) return FALSE;
1352
1353         x1 = (pr->x_scroll / pr->tile_width) * pr->tile_width;
1354         y1 = (pr->y_scroll / pr->tile_height) * pr->tile_height;
1355         x2 = ((pr->x_scroll + pr->vis_width) / pr->tile_width) * pr->tile_width + pr->tile_width;
1356         y2 = ((pr->y_scroll + pr->vis_height) / pr->tile_height) * pr->tile_height + pr->tile_height;
1357
1358         return !((double)st->x * pr->scale > (double)x2 ||
1359                  (double)(st->x + pr->source_tile_width) * pr->scale < (double)x1 ||
1360                  (double)st->y * pr->scale > (double)y2 ||
1361                  (double)(st->y + pr->source_tile_height) * pr->scale < (double)y1);
1362 }
1363
1364 static SourceTile *pr_source_tile_new(PixbufRenderer *pr, gint x, gint y)
1365 {
1366         SourceTile *st = NULL;
1367         gint count;
1368
1369         g_return_val_if_fail(pr->source_tile_width >= 1 && pr->source_tile_height >= 1, NULL);
1370
1371         if (pr->source_tiles_cache_size < 4) pr->source_tiles_cache_size = 4;
1372
1373         count = g_list_length(pr->source_tiles);
1374         if (count >= pr->source_tiles_cache_size)
1375                 {
1376                 GList *work;
1377
1378                 work = g_list_last(pr->source_tiles);
1379                 while (work && count >= pr->source_tiles_cache_size)
1380                         {
1381                         SourceTile *needle;
1382
1383                         needle = work->data;
1384                         work = work->prev;
1385
1386                         if (!pr_source_tile_visible(pr, needle))
1387                                 {
1388                                 pr->source_tiles = g_list_remove(pr->source_tiles, needle);
1389
1390                                 if (pr->func_tile_dispose)
1391                                         {
1392                                         pr->func_tile_dispose(pr, needle->x, needle->y,
1393                                                               pr->source_tile_width, pr->source_tile_height,
1394                                                               needle->pixbuf, pr->func_tile_data);
1395                                         }
1396
1397                                 if (!st)
1398                                         {
1399                                         st = needle;
1400                                         }
1401                                 else
1402                                         {
1403                                         pr_source_tile_free(needle);
1404                                         }
1405
1406                                 count--;
1407                                 }
1408                         }
1409                 }
1410
1411         if (!st)
1412                 {
1413                 st = g_new0(SourceTile, 1);
1414                 st->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8,
1415                                             pr->source_tile_width, pr->source_tile_height);
1416                 }
1417
1418         st->x = (x / pr->source_tile_width) * pr->source_tile_width;
1419         st->y = (y / pr->source_tile_height) * pr->source_tile_height;
1420         st->blank = TRUE;
1421
1422         pr->source_tiles = g_list_prepend(pr->source_tiles, st);
1423
1424         return st;
1425 }
1426
1427 static SourceTile *pr_source_tile_request(PixbufRenderer *pr, gint x, gint y)
1428 {
1429         SourceTile *st;
1430
1431         st = pr_source_tile_new(pr, x, y);
1432         if (!st) return NULL;
1433
1434         if (pr->func_tile_request &&
1435             pr->func_tile_request(pr, st->x, st->y,
1436                                    pr->source_tile_width, pr->source_tile_height, st->pixbuf, pr->func_tile_data))
1437                 {
1438                 st->blank = FALSE;
1439                 }
1440
1441         pr_tile_invalidate_region(pr, st->x * pr->scale, st->y * pr->scale,
1442                                   pr->source_tile_width * pr->scale, pr->source_tile_height * pr->scale);
1443
1444         return st;
1445 }
1446
1447 static SourceTile *pr_source_tile_find(PixbufRenderer *pr, gint x, gint y)
1448 {
1449         GList *work;
1450
1451         work = pr->source_tiles;
1452         while (work)
1453                 {
1454                 SourceTile *st = work->data;
1455
1456                 if (x >= st->x && x < st->x + pr->source_tile_width &&
1457                     y >= st->y && y < st->y + pr->source_tile_height)
1458                         {
1459                         if (work != pr->source_tiles)
1460                                 {
1461                                 pr->source_tiles = g_list_remove_link(pr->source_tiles, work);
1462                                 pr->source_tiles = g_list_concat(work, pr->source_tiles);
1463                                 }
1464                         return st;
1465                         }
1466
1467                 work = work->next;
1468                 }
1469
1470         return NULL;
1471 }
1472
1473 static GList *pr_source_tile_compute_region(PixbufRenderer *pr, gint x, gint y, gint w, gint h, gint request)
1474 {
1475         gint x1, y1;
1476         GList *list = NULL;
1477         gint sx, sy;
1478
1479         if (x < 0) x = 0;
1480         if (y < 0) y = 0;
1481         if (w > pr->image_width) w = pr->image_width;
1482         if (h > pr->image_height) h = pr->image_height;
1483
1484         sx = (x / pr->source_tile_width) * pr->source_tile_width;
1485         sy = (y / pr->source_tile_height) * pr->source_tile_height;
1486
1487         for (x1 = sx; x1 < x + w; x1+= pr->source_tile_width)
1488                 {
1489                 for (y1 = sy; y1 < y + h; y1 += pr->source_tile_height)
1490                         {
1491                         SourceTile *st;
1492
1493                         st = pr_source_tile_find(pr, x1, y1);
1494                         if (!st && request) st = pr_source_tile_request(pr, x1, y1);
1495
1496                         if (st) list = g_list_prepend(list, st);
1497                         }
1498                 }
1499
1500         return g_list_reverse(list);
1501 }
1502
1503 static void pr_source_tile_changed(PixbufRenderer *pr, gint x, gint y, gint width, gint height)
1504 {
1505         GList *work;
1506
1507         if (width < 1 || height < 1) return;
1508
1509         work = pr->source_tiles;
1510         while (work)
1511                 {
1512                 SourceTile *st;
1513                 gint rx, ry, rw, rh;
1514
1515                 st = work->data;
1516                 work = work->next;
1517
1518                 if (pr_clip_region(st->x, st->y, pr->source_tile_width, pr->source_tile_height,
1519                                    x, y, width, height,
1520                                    &rx, &ry, &rw, &rh))
1521                         {
1522                         GdkPixbuf *pixbuf;
1523
1524                         pixbuf = gdk_pixbuf_new_subpixbuf(st->pixbuf, rx - st->x, ry - st->y, rw, rh);
1525                         if (pr->func_tile_request &&
1526                             pr->func_tile_request(pr, rx, ry, rw, rh, pixbuf, pr->func_tile_data))
1527                                 {
1528                                 pr_tile_invalidate_region(pr, rx * pr->scale, ry * pr->scale,
1529                                                               rw * pr->scale, rh * pr->scale);
1530                                 }
1531                         g_object_unref(pixbuf);
1532                         }
1533                 }
1534 }
1535
1536 static gint pr_source_tile_render(PixbufRenderer *pr, ImageTile *it,
1537                                   gint x, gint y, gint w, gint h,
1538                                   gint new_data, gint fast)
1539 {
1540         GtkWidget *box;
1541         GList *list;
1542         GList *work;
1543         gint draw = FALSE;
1544
1545         box = GTK_WIDGET(pr);
1546
1547         if (pr->zoom == 1.0 || pr->scale == 1.0)
1548                 {
1549                 list = pr_source_tile_compute_region(pr, it->x + x, it->y + y, w, h, TRUE);
1550                 work = list;
1551                 while (work)
1552                         {
1553                         SourceTile *st;
1554                         gint rx, ry, rw, rh;
1555
1556                         st = work->data;
1557                         work = work->next;
1558
1559                         if (pr_clip_region(st->x, st->y, pr->source_tile_width, pr->source_tile_height,
1560                                            it->x + x, it->y + y, w, h,
1561                                            &rx, &ry, &rw, &rh))
1562                                 {
1563                                 if (st->blank)
1564                                         {
1565                                         gdk_draw_rectangle(it->pixmap, box->style->black_gc, TRUE,
1566                                                            rx - st->x, ry - st->y, rw, rh);
1567                                         }
1568                                 else /* (pr->zoom == 1.0 || pr->scale == 1.0) */
1569                                         {
1570                                         gdk_draw_pixbuf(it->pixmap,
1571                                                         box->style->fg_gc[GTK_WIDGET_STATE(box)],
1572                                                         st->pixbuf,
1573                                                         rx - st->x, ry - st->y,
1574                                                         rx - it->x, ry - it->y,
1575                                                         rw, rh,
1576                                                         pr->dither_quality, rx, ry);
1577                                         }
1578                                 }
1579                         }
1580                 }
1581         else
1582                 {
1583                 double scale_x, scale_y;
1584                 gint sx, sy, sw, sh;
1585
1586                 if (pr->image_width == 0 || pr->image_height == 0) return FALSE;
1587                 scale_x = (double)pr->width / pr->image_width;
1588                 scale_y = (double)pr->height / pr->image_height;
1589
1590                 sx = (double)(it->x + x) / scale_x;
1591                 sy = (double)(it->y + y) / scale_y;
1592                 sw = (double)w / scale_x;
1593                 sh = (double)h / scale_y;
1594
1595                 if (pr->width < PR_MIN_SCALE_SIZE || pr->height < PR_MIN_SCALE_SIZE) fast = TRUE;
1596
1597 #if 0
1598                 /* draws red over draw region, to check for leaks (regions not filled) */
1599                 pixbuf_set_rect_fill(it->pixbuf, x, y, w, h, 255, 0, 0, 255);
1600 #endif
1601
1602                 list = pr_source_tile_compute_region(pr, sx, sy, sw, sh, TRUE);
1603                 work = list;
1604                 while (work)
1605                         {
1606                         SourceTile *st;
1607                         gint rx, ry, rw, rh;
1608                         gint stx, sty, stw, sth;
1609
1610                         st = work->data;
1611                         work = work->next;
1612
1613                         stx = floor((double)st->x * scale_x);
1614                         sty = floor((double)st->y * scale_y);
1615                         stw = ceil ((double)(st->x + pr->source_tile_width) * scale_x) - stx;
1616                         sth = ceil ((double)(st->y + pr->source_tile_height) * scale_y) - sty;
1617
1618                         if (pr_clip_region(stx, sty, stw, sth,
1619                                            it->x + x, it->y + y, w, h,
1620                                            &rx, &ry, &rw, &rh))
1621                                 {
1622                                 if (st->blank)
1623                                         {
1624                                         gdk_draw_rectangle(it->pixmap, box->style->black_gc, TRUE,
1625                                                            rx - st->x, ry - st->y, rw, rh);
1626                                         }
1627                                 else
1628                                         {
1629                                         double offset_x;
1630                                         double offset_y;
1631
1632                                         /* may need to use unfloored stx,sty values here */
1633                                         offset_x = (double)(stx - it->x);
1634                                         offset_y = (double)(sty - it->y);
1635
1636                                         gdk_pixbuf_scale(st->pixbuf, it->pixbuf, rx - it->x, ry - it->y, rw, rh,
1637                                                  (double) 0.0 + offset_x,
1638                                                  (double) 0.0 + offset_y,
1639                                                  scale_x, scale_y,
1640                                                  (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality);
1641                                         draw = TRUE;
1642                                         }
1643                                 }
1644                         }
1645                 }
1646
1647         g_list_free(list);
1648
1649         return draw;
1650 }
1651
1652 void pixbuf_renderer_set_tiles(PixbufRenderer *pr, gint width, gint height,
1653                                gint tile_width, gint tile_height, gint cache_size,
1654                                PixbufRendererTileRequestFunc func_request,
1655                                PixbufRendererTileDisposeFunc func_dispose,
1656                                gpointer user_data,
1657                                gdouble zoom)
1658 {
1659         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
1660         g_return_if_fail(tile_width >= 32 && tile_width >= 32);
1661         g_return_if_fail(width >= 32 && height > 32);
1662         g_return_if_fail(func_request != NULL);
1663
1664         if (pr->pixbuf) g_object_unref(pr->pixbuf);
1665         pr->pixbuf = NULL;
1666
1667         pr_source_tile_unset(pr);
1668
1669         if (cache_size < 4) cache_size = 4;
1670
1671         pr->source_tiles_enabled = TRUE;
1672         pr->source_tiles_cache_size = cache_size;
1673         pr->source_tile_width = tile_width;
1674         pr->source_tile_height = tile_height;
1675
1676         pr->image_width = width;
1677         pr->image_height = height;
1678
1679         pr->func_tile_request = func_request;
1680         pr->func_tile_dispose = func_dispose;
1681         pr->func_tile_data = user_data;
1682
1683         pr_zoom_sync(pr, zoom, TRUE, TRUE, FALSE, 0, 0);
1684         pr_redraw(pr, TRUE);
1685 }
1686
1687 void pixbuf_renderer_set_tiles_size(PixbufRenderer *pr, gint width, gint height)
1688 {
1689         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
1690         g_return_if_fail(width >= 32 && height > 32);
1691
1692         if (!pr->source_tiles_enabled) return;
1693         if (pr->image_width == width && pr->image_height == height) return;
1694
1695         pr->image_width = width;
1696         pr->image_height = height;
1697
1698         pr_zoom_sync(pr, pr->zoom, TRUE, FALSE, FALSE, 0, 0);
1699 }
1700
1701 gint pixbuf_renderer_get_tiles(PixbufRenderer *pr)
1702 {
1703         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
1704
1705         return pr->source_tiles_enabled;
1706 }
1707
1708 static void pr_zoom_adjust_real(PixbufRenderer *pr, gdouble increment,
1709                                 gint center_point, gint x, gint y)
1710 {
1711         gdouble zoom = pr->zoom;
1712
1713         if (increment == 0.0) return;
1714
1715         if (zoom == 0.0)
1716                 {
1717                 if (pr->scale < 1.0)
1718                         {
1719                         zoom = 0.0 - 1.0 / pr->scale;
1720                         }
1721                 else
1722                         {
1723                         zoom = pr->scale;
1724                         }
1725                 }
1726
1727         if (increment < 0.0)
1728                 {
1729                 if (zoom >= 1.0 && zoom + increment < 1.0)
1730                         {
1731                         zoom = zoom + increment - 2.0;
1732                         }
1733                 else
1734                         {
1735                         zoom = zoom + increment;
1736                         }
1737                 }
1738         else
1739                 {
1740                 if (zoom <= -1.0 && zoom + increment > -1.0)
1741                         {
1742                         zoom = zoom + increment + 2.0;
1743                         }
1744                 else
1745                         {
1746                         zoom = zoom + increment;
1747                         }
1748                 }
1749
1750         pr_zoom_sync(pr, zoom, FALSE, FALSE, center_point, x, y);
1751 }
1752
1753 /*
1754  *-------------------------------------------------------------------
1755  * display tiles
1756  *-------------------------------------------------------------------
1757  */
1758
1759 static ImageTile *pr_tile_new(gint x, gint y, gint width, gint height)
1760 {
1761         ImageTile *it;
1762
1763         it = g_new0(ImageTile, 1);
1764
1765         it->x = x;
1766         it->y = y;
1767         it->w = width;
1768         it->h = height;
1769
1770         it->render_done = TILE_RENDER_NONE;
1771
1772         return it;
1773 }
1774
1775 static void pr_tile_free(ImageTile *it)
1776 {
1777         if (!it) return;
1778
1779         if (it->pixbuf) gdk_pixbuf_unref(it->pixbuf);
1780         if (it->pixmap) g_object_unref(it->pixmap);
1781
1782         g_free(it);
1783 }
1784
1785 static void pr_tile_free_all(PixbufRenderer *pr)
1786 {
1787         GList *work;
1788
1789         work = pr->tiles;
1790         while (work)
1791                 {
1792                 ImageTile *it;
1793
1794                 it = work->data;
1795                 work = work->next;
1796
1797                 pr_tile_free(it);
1798                 }
1799
1800         g_list_free(pr->tiles);
1801         pr->tiles = NULL;
1802         pr->tile_cache_size = 0;
1803 }
1804
1805 static ImageTile *pr_tile_add(PixbufRenderer *pr, gint x, gint y)
1806 {
1807         ImageTile *it;
1808
1809         it = pr_tile_new(x, y, pr->tile_width, pr->tile_height);
1810
1811         if (it->x + it->w > pr->width) it->w = pr->width - it->x;
1812         if (it->y + it->h > pr->height) it->h = pr->height - it->y;
1813
1814         pr->tiles = g_list_prepend(pr->tiles, it);
1815         pr->tile_cache_size += it->size;
1816
1817         return it;
1818 }
1819
1820 static void pr_tile_remove(PixbufRenderer *pr, ImageTile *it)
1821 {
1822         if (it->qd)
1823                 {
1824                 QueueData *qd = it->qd;
1825
1826                 it->qd = NULL;
1827                 pr->draw_queue = g_list_remove(pr->draw_queue, qd);
1828                 g_free(qd);
1829                 }
1830
1831         if (it->qd2)
1832                 {
1833                 QueueData *qd = it->qd2;
1834
1835                 it->qd2 = NULL;
1836                 pr->draw_queue_2pass = g_list_remove(pr->draw_queue_2pass, qd);
1837                 g_free(qd);
1838                 }
1839
1840         pr->tiles = g_list_remove(pr->tiles, it);
1841         pr->tile_cache_size -= it->size;
1842
1843         pr_tile_free(it);
1844 }
1845
1846 static void pr_tile_free_space(PixbufRenderer *pr, guint space, ImageTile *it)
1847 {
1848         GList *work;
1849         gint tile_max;
1850
1851         work = g_list_last(pr->tiles);
1852
1853         if (pr->source_tiles_enabled && pr->scale < 1.0)
1854                 {
1855                 gint tiles;
1856
1857                 tiles = (pr->vis_width / pr->tile_width + 1) * (pr->vis_height / pr->tile_height + 1);
1858                 tile_max = MAX(tiles * pr->tile_width * pr->tile_height * 3,
1859                                (gint)((double)pr->tile_cache_max * 1048576.0 * pr->scale));
1860                 }
1861         else
1862                 {
1863                 tile_max = pr->tile_cache_max * 1048576;
1864                 }
1865
1866         while (work && pr->tile_cache_size + space > tile_max)
1867                 {
1868                 ImageTile *needle;
1869
1870                 needle = work->data;
1871                 work = work->prev;
1872                 if (needle != it &&
1873                     ((!needle->qd && !needle->qd2) || !pr_tile_is_visible(pr, needle))) pr_tile_remove(pr, needle);
1874                 }
1875 }
1876
1877 static void pr_tile_invalidate_all(PixbufRenderer *pr)
1878 {
1879         GList *work;
1880
1881         work = pr->tiles;
1882         while (work)
1883                 {
1884                 ImageTile *it;
1885
1886                 it = work->data;
1887                 work = work->next;
1888
1889                 it->render_done = TILE_RENDER_NONE;
1890                 it->render_todo = TILE_RENDER_ALL;
1891                 it->blank = FALSE;
1892
1893                 it->w = MIN(pr->tile_width, pr->width - it->x);
1894                 it->h = MIN(pr->tile_height, pr->height - it->y);
1895                 }
1896 }
1897
1898 static void pr_tile_invalidate_region(PixbufRenderer *pr, gint x, gint y, gint w, gint h)
1899 {
1900         gint x1, x2;
1901         gint y1, y2;
1902         GList *work;
1903
1904         x1 = (gint)floor(x / pr->tile_width) * pr->tile_width;
1905         x2 = (gint)ceil((x + w) / pr->tile_width) * pr->tile_width;
1906
1907         y1 = (gint)floor(y / pr->tile_height) * pr->tile_height;
1908         y2 = (gint)ceil((y + h) / pr->tile_height) * pr->tile_height;
1909
1910         work = pr->tiles;
1911         while (work)
1912                 {
1913                 ImageTile *it;
1914
1915                 it = work->data;
1916                 work = work->next;
1917
1918                 if (it->x < x2 && it->x + it->w > x1 &&
1919                     it->y < y2 && it->y + it->h > y1)
1920                         {
1921                         it->render_done = TILE_RENDER_NONE;
1922                         it->render_todo = TILE_RENDER_ALL;
1923                         }
1924                 }
1925 }
1926
1927 static ImageTile *pr_tile_get(PixbufRenderer *pr, gint x, gint y, gint only_existing)
1928 {
1929         GList *work;
1930
1931         work = pr->tiles;
1932         while (work)
1933                 {
1934                 ImageTile *it;
1935
1936                 it = work->data;
1937                 if (it->x == x && it->y == y)
1938                         {
1939                         pr->tiles = g_list_delete_link(pr->tiles, work);
1940                         pr->tiles = g_list_prepend(pr->tiles, it);
1941                         return it;
1942                         }
1943
1944                 work = work->next;
1945                 }
1946
1947         if (only_existing) return NULL;
1948
1949         return pr_tile_add(pr, x, y);
1950 }
1951
1952 static void pr_tile_prepare(PixbufRenderer *pr, ImageTile *it)
1953 {
1954         if (!it->pixmap)
1955                 {
1956                 GdkPixmap *pixmap;
1957                 guint size;
1958
1959                 pixmap = gdk_pixmap_new(((GtkWidget *)pr)->window, pr->tile_width, pr->tile_height, -1);
1960
1961                 size = pixmap_calc_size(pixmap);
1962                 pr_tile_free_space(pr, size, it);
1963
1964                 it->pixmap = pixmap;
1965                 it->size += size;
1966                 pr->tile_cache_size += size;
1967                 }
1968
1969         if ((pr->zoom != 1.0 || pr->source_tiles_enabled || (pr->pixbuf && gdk_pixbuf_get_has_alpha(pr->pixbuf)) ) &&
1970             !it->pixbuf)
1971                 {
1972                 GdkPixbuf *pixbuf;
1973                 guint size;
1974
1975                 if (pr->pixbuf)
1976                         {
1977                         pixbuf = gdk_pixbuf_new(gdk_pixbuf_get_colorspace(pr->pixbuf),
1978                                                 gdk_pixbuf_get_has_alpha(pr->pixbuf),
1979                                                 gdk_pixbuf_get_bits_per_sample(pr->pixbuf),
1980                                                 pr->tile_width, pr->tile_height);
1981                         }
1982                 else
1983                         {
1984                         pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, pr->tile_width, pr->tile_height);
1985                         }
1986
1987                 size = gdk_pixbuf_get_rowstride(pixbuf) * pr->tile_height;
1988                 pr_tile_free_space(pr, size, it);
1989
1990                 it->pixbuf = pixbuf;
1991                 it->size += size;
1992                 pr->tile_cache_size += size;
1993                 }
1994 }
1995
1996 /*
1997  *-------------------------------------------------------------------
1998  * drawing
1999  *-------------------------------------------------------------------
2000  */
2001
2002 static void pr_tile_render(PixbufRenderer *pr, ImageTile *it,
2003                            gint x, gint y, gint w, gint h,
2004                            gint new_data, gint fast)
2005 {
2006         GtkWidget *box;
2007         gint has_alpha;
2008         gint draw = FALSE;
2009
2010         if (it->render_todo == TILE_RENDER_NONE && it->pixmap && !new_data) return;
2011
2012         if (it->render_done != TILE_RENDER_ALL)
2013                 {
2014                 x = 0;
2015                 y = 0;
2016                 w = it->w;
2017                 h = it->h;
2018                 if (!fast) it->render_done = TILE_RENDER_ALL;
2019                 }
2020         else if (it->render_todo != TILE_RENDER_AREA)
2021                 {
2022                 if (!fast) it->render_todo = TILE_RENDER_NONE;
2023                 return;
2024                 }
2025
2026         if (!fast) it->render_todo = TILE_RENDER_NONE;
2027
2028         if (new_data) it->blank = FALSE;
2029
2030         pr_tile_prepare(pr, it);
2031         has_alpha = (pr->pixbuf && gdk_pixbuf_get_has_alpha(pr->pixbuf));
2032
2033         box = GTK_WIDGET(pr);
2034
2035         /* FIXME checker colors for alpha should be configurable,
2036          * also should be drawn for blank = TRUE
2037          */
2038
2039         if (it->blank)
2040                 {
2041                 /* no data, do fast rect fill */
2042                 gdk_draw_rectangle(it->pixmap, box->style->black_gc, TRUE,
2043                                    0, 0, it->w, it->h);
2044                 }
2045         else if (pr->source_tiles_enabled)
2046                 {
2047                 draw = pr_source_tile_render(pr, it, x, y, w, h, new_data, fast);
2048                 }
2049         else if (pr->zoom == 1.0 || pr->scale == 1.0)
2050                 {
2051                 if (has_alpha)
2052                         {
2053                         gdk_pixbuf_composite_color(pr->pixbuf, it->pixbuf, x, y, w, h,
2054                                          (double) 0.0 - it->x,
2055                                          (double) 0.0 - it->y,
2056                                          1.0, 1.0, GDK_INTERP_NEAREST,
2057                                          255, it->x + x, it->y + y,
2058                                          PR_ALPHA_CHECK_SIZE, PR_ALPHA_CHECK1, PR_ALPHA_CHECK2);
2059                         draw = TRUE;
2060                         }
2061                 else
2062                         {
2063                         /* faster, simple */
2064                         gdk_draw_pixbuf(it->pixmap,
2065                                         box->style->fg_gc[GTK_WIDGET_STATE(box)],
2066                                         pr->pixbuf,
2067                                         it->x + x, it->y + y,
2068                                         x, y,
2069                                         w, h,
2070                                         pr->dither_quality, it->x + x, it->y + y);
2071                         }
2072                 }
2073         else
2074                 {
2075                 double scale_x, scale_y;
2076
2077                 if (pr->image_width == 0 || pr->image_height == 0) return;
2078                 scale_x = (double)pr->width / pr->image_width;
2079                 scale_y = (double)pr->height / pr->image_height;
2080
2081                 /* HACK: The pixbuf scalers get kinda buggy(crash) with extremely
2082                  * small sizes for anything but GDK_INTERP_NEAREST
2083                  */
2084                 if (pr->width < PR_MIN_SCALE_SIZE || pr->height < PR_MIN_SCALE_SIZE) fast = TRUE;
2085
2086                 if (!has_alpha)
2087                         {
2088                         gdk_pixbuf_scale(pr->pixbuf, it->pixbuf, x, y, w, h,
2089                                          (double) 0.0 - it->x,
2090                                          (double) 0.0 - it->y,
2091                                          scale_x, scale_y,
2092                                          (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality);
2093                         }
2094                 else
2095                         {
2096                         gdk_pixbuf_composite_color(pr->pixbuf, it->pixbuf, x, y, w, h,
2097                                          (double) 0.0 - it->x,
2098                                          (double) 0.0 - it->y,
2099                                          scale_x, scale_y,
2100                                          (fast) ? GDK_INTERP_NEAREST : pr->zoom_quality,
2101                                          255, it->x + x, it->y + y,
2102                                          PR_ALPHA_CHECK_SIZE, PR_ALPHA_CHECK1, PR_ALPHA_CHECK2);
2103                         }
2104                 draw = TRUE;
2105                 }
2106
2107         if (draw && it->pixbuf && !it->blank)
2108                 {
2109                 gdk_draw_pixbuf(it->pixmap,
2110                                 box->style->fg_gc[GTK_WIDGET_STATE(box)],
2111                                 it->pixbuf,
2112                                 x, y,
2113                                 x, y,
2114                                 w, h,
2115                                 pr->dither_quality, it->x + x, it->y + y);
2116                 }
2117
2118 #if 0
2119         /* enable this line for debugging the edges of tiles */
2120         gdk_draw_rectangle(it->pixmap, box->style->white_gc,
2121                            FALSE, 0, 0, it->w, it->h);
2122 #endif
2123 }
2124
2125
2126 static void pr_tile_expose(PixbufRenderer *pr, ImageTile *it,
2127                            gint x, gint y, gint w, gint h,
2128                            gint new_data, gint fast)
2129 {
2130         GtkWidget *box;
2131
2132         pr_tile_render(pr, it, x, y, w, h, new_data, fast);
2133
2134         box = GTK_WIDGET(pr);
2135
2136         gdk_draw_drawable(box->window, box->style->fg_gc[GTK_WIDGET_STATE(box)],
2137                           it->pixmap, x, y,
2138                           pr->x_offset + (it->x - pr->x_scroll) + x, pr->y_offset + (it->y - pr->y_scroll) + y, w, h);
2139
2140         if (pr->overlay_list)
2141                 {
2142                 pr_overlay_draw(pr, pr->x_offset + (it->x - pr->x_scroll) + x,
2143                                 pr->y_offset + (it->y - pr->y_scroll) + y,
2144                                 w, h,
2145                                 it);
2146                 }
2147 }
2148
2149
2150 static gint pr_tile_is_visible(PixbufRenderer *pr, ImageTile *it)
2151 {
2152         return (it->x + it->w >= pr->x_scroll && it->x < pr->x_scroll + pr->vis_width &&
2153                 it->y + it->h >= pr->y_scroll && it->y < pr->y_scroll + pr->vis_height);
2154 }
2155
2156 /*
2157  *-------------------------------------------------------------------
2158  * draw queue
2159  *-------------------------------------------------------------------
2160  */
2161
2162 static gint pr_queue_draw_idle_cb(gpointer data)
2163 {
2164         PixbufRenderer *pr = data;
2165         QueueData *qd;
2166         gint fast;
2167
2168         if ((!pr->pixbuf && !pr->source_tiles_enabled) ||
2169             (!pr->draw_queue && !pr->draw_queue_2pass) ||
2170             pr->draw_idle_id == -1)
2171                 {
2172                 pr_render_complete_signal(pr);
2173
2174                 pr->draw_idle_id = -1;
2175                 return FALSE;
2176                 }
2177
2178         if (pr->draw_queue)
2179                 {
2180                 qd = pr->draw_queue->data;
2181                 fast = (pr->zoom_2pass && pr->zoom_quality != GDK_INTERP_NEAREST && pr->scale != 1.0);
2182                 }
2183         else
2184                 {
2185                 if (pr->loading)
2186                         {
2187                         /* still loading, wait till done (also drops the higher priority) */
2188
2189                         pr->draw_idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE,
2190                                                            pr_queue_draw_idle_cb, pr, NULL);
2191                         pr->draw_idle_high = FALSE;
2192                         return FALSE;
2193                         }
2194
2195                 qd = pr->draw_queue_2pass->data;
2196                 fast = FALSE;
2197                 }
2198
2199         if (GTK_WIDGET_REALIZED(pr))
2200                 {
2201                 if (pr_tile_is_visible(pr, qd->it))
2202                         {
2203                         pr_tile_expose(pr, qd->it, qd->x, qd->y, qd->w, qd->h, qd->new_data, fast);
2204                         }
2205                 else if (qd->new_data)
2206                         {
2207                         /* if new pixel data, and we already have a pixmap, update the tile */
2208                         qd->it->blank = FALSE;
2209                         if (qd->it->pixmap && qd->it->render_done == TILE_RENDER_ALL)
2210                                 {
2211                                 pr_tile_render(pr, qd->it, qd->x, qd->y, qd->w, qd->h, qd->new_data, fast);
2212                                 }
2213                         }
2214                 }
2215
2216         if (pr->draw_queue)
2217                 {
2218                 qd->it->qd = NULL;
2219                 pr->draw_queue = g_list_remove(pr->draw_queue, qd);
2220                 if (fast)
2221                         {
2222                         if (qd->it->qd2)
2223                                 {
2224                                 pr_queue_merge(qd->it->qd2, qd);
2225                                 g_free(qd);
2226                                 }
2227                         else
2228                                 {
2229                                 qd->it->qd2 = qd;
2230                                 pr->draw_queue_2pass = g_list_append(pr->draw_queue_2pass, qd);
2231                                 }
2232                         }
2233                 else
2234                         {
2235                         g_free(qd);
2236                         }
2237                 }
2238         else
2239                 {
2240                 qd->it->qd2 = NULL;
2241                 pr->draw_queue_2pass = g_list_remove(pr->draw_queue_2pass, qd);
2242                 g_free(qd);
2243                 }
2244
2245         if (!pr->draw_queue && !pr->draw_queue_2pass)
2246                 {
2247                 pr_render_complete_signal(pr);
2248
2249                 pr->draw_idle_id = -1;
2250                 return FALSE;
2251                 }
2252
2253         return TRUE;
2254 }
2255
2256 static void pr_queue_list_free(GList *list)
2257 {
2258         GList *work;
2259
2260         work = list;
2261         while (work)
2262                 {
2263                 QueueData *qd;
2264
2265                 qd = work->data;
2266                 work = work->next;
2267
2268                 qd->it->qd = NULL;
2269                 qd->it->qd2 = NULL;
2270                 g_free(qd);
2271                 }
2272
2273         g_list_free(list);
2274 }
2275
2276 static void pr_queue_clear(PixbufRenderer *pr)
2277 {
2278         pr_queue_list_free(pr->draw_queue);
2279         pr->draw_queue = NULL;
2280
2281         pr_queue_list_free(pr->draw_queue_2pass);
2282         pr->draw_queue_2pass = NULL;
2283
2284         if (pr->draw_idle_id != -1) g_source_remove(pr->draw_idle_id);
2285         pr->draw_idle_id = -1;
2286 }
2287
2288 static void pr_queue_merge(QueueData *parent, QueueData *qd)
2289 {
2290         if (parent->x + parent->w < qd->x + qd->w)
2291                 {
2292                 parent->w += (qd->x + qd->w) - (parent->x + parent->w);
2293                 }
2294         if (parent->x > qd->x)
2295                 {
2296                 parent->w += parent->x - qd->x;
2297                 parent->x = qd->x;
2298                 }
2299
2300         if (parent->y + parent->h < qd->y + qd->h)
2301                 {
2302                 parent->h += (qd->y + qd->h) - (parent->y + parent->h);
2303                 }
2304         if (parent->y > qd->y)
2305                 {
2306                 parent->h += parent->y - qd->y;
2307                 parent->y = qd->y;
2308                 }
2309
2310         parent->new_data |= qd->new_data;
2311 }
2312
2313 static gint pr_clamp_to_visible(PixbufRenderer *pr, gint *x, gint *y, gint *w, gint *h)
2314 {
2315         gint nx, ny;
2316         gint nw, nh;
2317         gint vx, vy;
2318         gint vw, vh;
2319
2320         vw = pr->vis_width;
2321         vh = pr->vis_height;
2322
2323         vx = pr->x_scroll;
2324         vy = pr->y_scroll;
2325
2326         if (*x + *w < vx || *x > vx + vw || *y + *h < vy || *y > vy + vh) return FALSE;
2327
2328         /* now clamp it */
2329         nx = CLAMP(*x, vx, vx + vw);
2330         nw = CLAMP(*w - (nx - *x), 1, vw);
2331
2332         ny = CLAMP(*y, vy, vy + vh);
2333         nh = CLAMP(*h - (ny - *y), 1, vh);
2334
2335         *x = nx;
2336         *y = ny;
2337         *w = nw;
2338         *h = nh;
2339
2340         return TRUE;
2341 }
2342
2343 static gint pr_queue_to_tiles(PixbufRenderer *pr, gint x, gint y, gint w, gint h,
2344                               gint clamp, ImageTileRenderType render, gint new_data, gint only_existing)
2345 {
2346         gint i, j;
2347         gint x1, x2;
2348         gint y1, y2;
2349
2350         if (clamp && !pr_clamp_to_visible(pr, &x, &y, &w, &h)) return FALSE;
2351
2352         x1 = (gint)floor(x / pr->tile_width) * pr->tile_width;
2353         x2 = (gint)ceil((x + w) / pr->tile_width) * pr->tile_width;
2354
2355         y1 = (gint)floor(y / pr->tile_height) * pr->tile_height;
2356         y2 = (gint)ceil((y + h) / pr->tile_height) * pr->tile_height;
2357
2358         for (j = y1; j <= y2; j += pr->tile_height)
2359                 {
2360                 for (i = x1; i <= x2; i += pr->tile_width)
2361                         {
2362                         ImageTile *it;
2363
2364                         it = pr_tile_get(pr, i, j,
2365                                          (only_existing &&
2366                                           (i + pr->tile_width < pr->x_scroll ||
2367                                            i > pr->x_scroll + pr->vis_width ||
2368                                            j + pr->tile_height < pr->y_scroll ||
2369                                            j > pr->y_scroll + pr->vis_height)));
2370                         if (it)
2371                                 {
2372                                 QueueData *qd;
2373
2374                                 if ((render == TILE_RENDER_ALL && it->render_done != TILE_RENDER_ALL) ||
2375                                     (render == TILE_RENDER_AREA && it->render_todo != TILE_RENDER_ALL))
2376                                         {
2377                                         it->render_todo = render;
2378                                         }
2379
2380                                 qd = g_new(QueueData, 1);
2381                                 qd->it = it;
2382                                 qd->new_data = new_data;
2383
2384                                 if (i < x)
2385                                         {
2386                                         qd->x = x - i;
2387                                         }
2388                                 else
2389                                         {
2390                                         qd->x = 0;
2391                                         }
2392                                 qd->w = x + w - i - qd->x;
2393                                 if (qd->x + qd->w > pr->tile_width) qd->w = pr->tile_width - qd->x;
2394
2395                                 if (j < y)
2396                                         {
2397                                         qd->y = y - j;
2398                                         }
2399                                 else
2400                                         {
2401                                         qd->y = 0;
2402                                         }
2403                                 qd->h = y + h - j - qd->y;
2404                                 if (qd->y + qd->h > pr->tile_height) qd->h = pr->tile_height - qd->y;
2405
2406                                 if (qd->w < 1 || qd->h < 1)
2407                                         {
2408                                         g_free(qd);
2409                                         }
2410                                 else if (it->qd)
2411                                         {
2412                                         pr_queue_merge(it->qd, qd);
2413                                         g_free(qd);
2414                                         }
2415                                 else
2416                                         {
2417                                         it->qd = qd;
2418                                         pr->draw_queue = g_list_append(pr->draw_queue, qd);
2419                                         }
2420                                 }
2421                         }
2422                 }
2423
2424         return TRUE;
2425 }
2426
2427 static void pr_queue(PixbufRenderer *pr, gint x, gint y, gint w, gint h,
2428                      gint clamp, ImageTileRenderType render, gint new_data, gint only_existing)
2429 {
2430         gint nx, ny;
2431
2432         nx = CLAMP(x, 0, pr->width - 1);
2433         ny = CLAMP(y, 0, pr->height - 1);
2434         w -= (nx - x);
2435         h -= (ny - y);
2436         w = CLAMP(w, 0, pr->width - nx);
2437         h = CLAMP(h, 0, pr->height - ny);
2438         if (w < 1 || h < 1) return;
2439
2440         if (pr_queue_to_tiles(pr, nx, ny, w, h, clamp, render, new_data, only_existing) &&
2441             ((!pr->draw_queue && !pr->draw_queue_2pass) || pr->draw_idle_id == -1 || !pr->draw_idle_high))
2442                 {
2443                 if (pr->draw_idle_id != -1) g_source_remove(pr->draw_idle_id);
2444                 pr->draw_idle_id = g_idle_add_full(GDK_PRIORITY_REDRAW,
2445                                                    pr_queue_draw_idle_cb, pr, NULL);
2446                 pr->draw_idle_high = TRUE;
2447                 }
2448 }
2449
2450 static void pr_redraw(PixbufRenderer *pr, gint new_data)
2451 {
2452         pr_queue_clear(pr);
2453         pr_queue(pr, 0, 0, pr->width, pr->height, TRUE, TILE_RENDER_ALL, new_data, FALSE);
2454 }
2455
2456 /*
2457  *-------------------------------------------------------------------
2458  * signal emission
2459  *-------------------------------------------------------------------
2460  */
2461
2462 static void pr_update_signal(PixbufRenderer *pr)
2463 {
2464 #if 0
2465         printf("FIXME: send updated signal\n");
2466 #endif
2467 }
2468
2469 static void pr_zoom_signal(PixbufRenderer *pr)
2470 {
2471         g_signal_emit(pr, signals[SIGNAL_ZOOM], 0, pr->zoom);
2472 }
2473
2474 static void pr_clicked_signal(PixbufRenderer *pr, GdkEventButton *bevent)
2475 {
2476         g_signal_emit(pr, signals[SIGNAL_CLICKED], 0, bevent);
2477 }
2478
2479 static void pr_scroll_notify_signal(PixbufRenderer *pr)
2480 {
2481         g_signal_emit(pr, signals[SIGNAL_SCROLL_NOTIFY], 0);
2482 }
2483
2484 static void pr_render_complete_signal(PixbufRenderer *pr)
2485 {
2486         if (!pr->complete)
2487                 {
2488                 g_signal_emit(pr, signals[SIGNAL_RENDER_COMPLETE], 0);
2489                 g_object_set(G_OBJECT(pr), "complete", TRUE, NULL);
2490                 }
2491 }
2492
2493 static void pr_drag_signal(PixbufRenderer *pr, GdkEventButton *bevent)
2494 {
2495         g_signal_emit(pr, signals[SIGNAL_DRAG], 0, bevent);
2496 }
2497
2498 /*
2499  *-------------------------------------------------------------------
2500  * sync and clamp
2501  *-------------------------------------------------------------------
2502  */
2503
2504 static gint pr_scroll_clamp(PixbufRenderer *pr)
2505 {
2506         gint old_xs;
2507         gint old_ys;
2508
2509         if (pr->zoom == 0.0)
2510                 {
2511                 pr->x_scroll = 0;
2512                 pr->y_scroll = 0;
2513
2514                 return FALSE;
2515                 }
2516
2517         old_xs = pr->x_scroll;
2518         old_ys = pr->y_scroll;
2519
2520         if (pr->x_offset > 0)
2521                 {
2522                 pr->x_scroll = 0;
2523                 }
2524         else
2525                 {
2526                 pr->x_scroll = CLAMP(pr->x_scroll, 0, pr->width - pr->vis_width);
2527                 }
2528
2529         if (pr->y_offset > 0)
2530                 {
2531                 pr->y_scroll = 0;
2532                 }
2533         else
2534                 {
2535                 pr->y_scroll = CLAMP(pr->y_scroll, 0, pr->height - pr->vis_height);
2536                 }
2537
2538         return (old_xs != pr->x_scroll || old_ys != pr->y_scroll);
2539 }
2540
2541 static gint pr_size_clamp(PixbufRenderer *pr)
2542 {
2543         gint old_vw, old_vh;
2544
2545         old_vw = pr->vis_width;
2546         old_vh = pr->vis_height;
2547
2548         if (pr->width < pr->window_width)
2549                 {
2550                 pr->vis_width = pr->width;
2551                 pr->x_offset = (pr->window_width - pr->width) / 2;
2552                 }
2553         else
2554                 {
2555                 pr->vis_width = pr->window_width;
2556                 pr->x_offset = 0;
2557                 }
2558
2559         if (pr->height < pr->window_height)
2560                 {
2561                 pr->vis_height = pr->height;
2562                 pr->y_offset = (pr->window_height - pr->height) / 2;
2563                 }
2564         else
2565                 {
2566                 pr->vis_height = pr->window_height;
2567                 pr->y_offset = 0;
2568                 }
2569
2570         return (old_vw != pr->vis_width || old_vh != pr->vis_height);
2571 }
2572
2573 static gint pr_zoom_clamp(PixbufRenderer *pr, gdouble zoom,
2574                           gint force, gint new, gint invalidate,
2575                           gint *redrawn)
2576 {
2577         gint w, h;
2578         gdouble scale;
2579         gint invalid;
2580
2581         zoom = CLAMP(zoom, pr->zoom_min, pr->zoom_max);
2582
2583         if (pr->zoom == zoom && !force) return FALSE;
2584
2585         w = pr->image_width;
2586         h = pr->image_height;
2587
2588         if (zoom == 0.0 && !pr->pixbuf)
2589                 {
2590                 scale = 1.0;
2591                 }
2592         else if (zoom == 0.0)
2593                 {
2594                 gint max_w;
2595                 gint max_h;
2596                 gint sizeable;
2597
2598                 sizeable = (new && pr_parent_window_sizable(pr));
2599
2600                 if (sizeable)
2601                         {
2602                         max_w = gdk_screen_width();
2603                         max_h = gdk_screen_height();
2604
2605                         if (pr->window_limit)
2606                                 {
2607                                 max_w = max_w * pr->window_limit_size / 100;
2608                                 max_h = max_h * pr->window_limit_size / 100;
2609                                 }
2610                         }
2611                 else
2612                         {
2613                         max_w = pr->window_width;
2614                         max_h = pr->window_height;
2615                         }
2616
2617                 if ((pr->zoom_expand && !sizeable) || w > max_w || h > max_h)
2618                         {
2619                         if ((gdouble)max_w / w > (gdouble)max_h / h)
2620                                 {
2621                                 scale = (gdouble)max_h / h;
2622                                 h = max_h;
2623                                 w = w * scale + 0.5;
2624                                 if (w > max_w) w = max_w;
2625                                 }
2626                         else
2627                                 {
2628                                 scale = (gdouble)max_w / w;
2629                                 w = max_w;
2630                                 h = h * scale + 0.5;
2631                                 if (h > max_h) h = max_h;
2632                                 }
2633                         if (w < 1) w = 1;
2634                         if (h < 1) h = 1;
2635                         }
2636                 else
2637                         {
2638                         scale = 1.0;
2639                         }
2640                 }
2641         else if (zoom > 0.0) /* zoom orig, in */
2642                 {
2643                 scale = zoom;
2644                 w = w * scale;
2645                 h = h * scale;
2646                 }
2647         else /* zoom out */
2648                 {
2649                 scale = 1.0 / (0.0 - zoom);
2650                 w = w * scale;
2651                 h = h * scale;
2652                 }
2653
2654         invalid = (pr->width != w || pr->height != h);
2655
2656         pr->zoom = zoom;
2657         pr->width = w;
2658         pr->height = h;
2659         pr->scale = scale;
2660
2661         if (invalidate || invalid)
2662                 {
2663                 pr_tile_invalidate_all(pr);
2664                 pr_redraw(pr, TRUE);
2665                 }
2666         if (redrawn) *redrawn = (invalidate || invalid);
2667
2668         return TRUE;
2669 }
2670
2671 static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
2672                          gint force, gint new,
2673                          gint center_point, gint px, gint py)
2674 {
2675         gdouble old_scale;
2676         gint old_cx, old_cy;
2677         gint clamped;
2678         gint sized;
2679         gint redrawn = FALSE;
2680
2681         old_scale = pr->scale;
2682         if (center_point)
2683                 {
2684                 px = CLAMP(px, 0, pr->width);
2685                 py = CLAMP(py, 0, pr->height);
2686                 old_cx = pr->x_scroll + (px - pr->x_offset);
2687                 old_cy = pr->y_scroll + (py - pr->y_offset);
2688                 }
2689         else
2690                 {
2691                 px = py = 0;
2692                 old_cx = pr->x_scroll + pr->vis_width / 2;
2693                 old_cy = pr->y_scroll + pr->vis_height / 2;
2694                 }
2695
2696         if (!pr_zoom_clamp(pr, zoom, force, new, force, &redrawn)) return;
2697
2698         clamped = pr_size_clamp(pr);
2699         sized = pr_parent_window_resize(pr, pr->width, pr->height);
2700
2701         if (force && new)
2702                 {
2703                 switch (pr->scroll_reset)
2704                         {
2705                         case PR_SCROLL_RESET_NOCHANGE:
2706                                 /* maintain old scroll position, do nothing */
2707                                 break;
2708                         case PR_SCROLL_RESET_CENTER:
2709                                 /* center new image */
2710                                 pr->x_scroll = ((double)pr->image_width / 2.0 * pr->scale) - pr->vis_width / 2;
2711                                 pr->y_scroll = ((double)pr->image_height / 2.0 * pr->scale) - pr->vis_height / 2;
2712                                 break;
2713                         case PR_SCROLL_RESET_TOPLEFT:
2714                         default:
2715                                 /* reset to upper left */
2716                                 pr->x_scroll = 0;
2717                                 pr->y_scroll = 0;
2718                                 break;
2719                         }
2720                 }
2721         else
2722                 {
2723                 /* user zoom does not force, so keep visible center point */
2724                 if (center_point)
2725                         {
2726                         pr->x_scroll = old_cx / old_scale * pr->scale - (px - pr->x_offset);
2727                         pr->y_scroll = old_cy / old_scale * pr->scale - (py - pr->y_offset);
2728                         }
2729                 else
2730                         {
2731                         pr->x_scroll = old_cx / old_scale * pr->scale - (pr->vis_width / 2);
2732                         pr->y_scroll = old_cy / old_scale * pr->scale - (pr->vis_height / 2);
2733                         }
2734                 }
2735
2736         pr_scroll_clamp(pr);
2737
2738         /* If the window was not sized, redraw the image - we know there will be no size/expose signal.
2739          * But even if a size is claimed, there is no guarantee that the window manager will allow it,
2740          * so redraw the window anyway :/
2741          */
2742         if (sized || clamped) pr_border_clear(pr);
2743         pr_redraw(pr, redrawn);
2744
2745         pr_scroll_notify_signal(pr);
2746         pr_zoom_signal(pr);
2747         pr_update_signal(pr);
2748 }
2749
2750 static void pr_size_sync(PixbufRenderer *pr, gint new_width, gint new_height)
2751 {
2752         gint zoom_changed = FALSE;
2753
2754         if (pr->window_width == new_width && pr->window_height == new_height) return;
2755
2756         pr->window_width = new_width;
2757         pr->window_height = new_height;
2758
2759         if (pr->zoom == 0.0)
2760                 {
2761                 gdouble old_scale = pr->scale;
2762                 pr_zoom_clamp(pr, 0.0, TRUE, FALSE, FALSE, NULL);
2763                 zoom_changed = (old_scale != pr->scale);
2764                 }
2765
2766         pr_size_clamp(pr);
2767         pr_scroll_clamp(pr);
2768
2769         pr_overlay_update_sizes(pr);
2770
2771         /* ensure scroller remains visible */
2772         if (pr->scroller_overlay != -1)
2773                 {
2774                 gint update = FALSE;
2775
2776                 if (pr->scroller_x > new_width)
2777                         {
2778                         pr->scroller_x = new_width;
2779                         pr->scroller_xpos = new_width;
2780                         update = TRUE;
2781                         }
2782                 if (pr->scroller_y > new_height)
2783                         {
2784                         pr->scroller_y = new_height;
2785                         pr->scroller_ypos = new_height;
2786                         update = TRUE;
2787                         }
2788
2789                 if (update)
2790                         {
2791                         GdkPixbuf *pixbuf;
2792
2793                         if (pixbuf_renderer_overlay_get(pr, pr->scroller_overlay, &pixbuf, NULL, NULL))
2794                                 {
2795                                 gint w, h;
2796
2797                                 w = gdk_pixbuf_get_width(pixbuf);
2798                                 h = gdk_pixbuf_get_height(pixbuf);
2799                                 pixbuf_renderer_overlay_set(pr, pr->scroller_overlay, pixbuf,
2800                                                             pr->scroller_x - w / 2, pr->scroller_y - h / 2);
2801                                 }
2802                         }
2803                 }
2804
2805         pr_border_clear(pr);
2806
2807         pr_scroll_notify_signal(pr);
2808         if (zoom_changed) pr_zoom_signal(pr);
2809         pr_update_signal(pr);
2810 }
2811
2812 static void pr_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
2813 {
2814         PixbufRenderer *pr = data;
2815
2816         pr_size_sync(pr, allocation->width, allocation->height);
2817 }
2818
2819 static void pixbuf_renderer_paint(PixbufRenderer *pr, GdkRectangle *area)
2820 {
2821         gint x, y;
2822
2823         pr_border_draw(pr, area->x, area->y, area->width, area->height);
2824
2825         x = MAX(0, (gint)area->x - pr->x_offset + pr->x_scroll);
2826         y = MAX(0, (gint)area->y - pr->y_offset + pr->y_scroll);
2827
2828         pr_queue(pr, x, y,
2829                  MIN((gint)area->width, pr->width - x),
2830                  MIN((gint)area->height, pr->height - y),
2831                  FALSE, TILE_RENDER_ALL, FALSE, FALSE);
2832 }
2833
2834 /*
2835  *-------------------------------------------------------------------
2836  * scrolling
2837  *-------------------------------------------------------------------
2838  */
2839
2840 void pixbuf_renderer_scroll(PixbufRenderer *pr, gint x, gint y)
2841 {
2842         gint old_x, old_y;
2843         gint x_off, y_off;
2844         gint w, h;
2845
2846         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
2847
2848         if (!pr->pixbuf && !pr->source_tiles_enabled) return;
2849
2850         old_x = pr->x_scroll;
2851         old_y = pr->y_scroll;
2852
2853         pr->x_scroll += x;
2854         pr->y_scroll += y;
2855
2856         pr_scroll_clamp(pr);
2857         if (pr->x_scroll == old_x && pr->y_scroll == old_y) return;
2858
2859         pr_scroll_notify_signal(pr);
2860
2861         x_off = pr->x_scroll - old_x;
2862         y_off = pr->y_scroll - old_y;
2863
2864         w = pr->vis_width - abs(x_off);
2865         h = pr->vis_height - abs(y_off);
2866
2867         if (w < 1 || h < 1)
2868                 {
2869                 /* scrolled completely to new material */
2870                 pr_queue(pr, 0, 0, pr->width, pr->height, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
2871                 return;
2872                 }
2873         else
2874                 {
2875                 gint x1, y1;
2876                 gint x2, y2;
2877                 GtkWidget *box;
2878                 GdkGC *gc;
2879                 GdkEvent *event;
2880
2881                 if (x_off < 0)
2882                         {
2883                         x1 = abs(x_off);
2884                         x2 = 0;
2885                         }
2886                 else
2887                         {
2888                         x1 = 0;
2889                         x2 = abs(x_off);
2890                         }
2891
2892                 if (y_off < 0)
2893                         {
2894                         y1 = abs(y_off);
2895                         y2 = 0;
2896                         }
2897                 else
2898                         {
2899                         y1 = 0;
2900                         y2 = abs(y_off);
2901                         }
2902
2903                 box = GTK_WIDGET(pr);
2904
2905                 gc = gdk_gc_new(box->window);
2906                 gdk_gc_set_exposures(gc, TRUE);
2907                 gdk_draw_drawable(box->window, gc,
2908                                   box->window,
2909                                   x2 + pr->x_offset, y2 + pr->y_offset,
2910                                   x1 + pr->x_offset, y1 + pr->y_offset, w, h);
2911                 g_object_unref(gc);
2912
2913                 if (pr->overlay_list)
2914                         {
2915                         pr_overlay_queue_all(pr);
2916                         }
2917
2918                 w = pr->vis_width - w;
2919                 h = pr->vis_height - h;
2920
2921                 if (w > 0)
2922                         {
2923                         pr_queue(pr,
2924                                  x_off > 0 ? pr->x_scroll + (pr->vis_width - w) : pr->x_scroll, pr->y_scroll,
2925                                  w, pr->vis_height, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
2926                         }
2927                 if (h > 0)
2928                         {
2929                         /* FIXME, to optimize this, remove overlap */
2930                         pr_queue(pr,
2931                                  pr->x_scroll, y_off > 0 ? pr->y_scroll + (pr->vis_height - h) : pr->y_scroll,
2932                                  pr->vis_width, h, TRUE, TILE_RENDER_ALL, FALSE, FALSE);
2933                         }
2934
2935                 /* process exposures here, "expose_event" seems to miss a few with obstructed windows */
2936                 while ((event = gdk_event_get_graphics_expose(box->window)) != NULL)
2937                         {
2938                         pixbuf_renderer_paint(pr, &event->expose.area);
2939
2940                         if (event->expose.count == 0)
2941                                 {
2942                                 gdk_event_free(event);
2943                                 break;
2944                                 }
2945                         gdk_event_free(event);
2946                         }
2947                 }
2948 }
2949
2950 void pixbuf_renderer_scroll_to_point(PixbufRenderer *pr, gint x, gint y,
2951                                      gdouble x_align, gdouble y_align)
2952 {
2953         gint px, py;
2954         gint ax, ay;
2955
2956         x_align = CLAMP(x_align, 0.0, 1.0);
2957         y_align = CLAMP(y_align, 0.0, 1.0);
2958
2959         ax = (gdouble)pr->vis_width * x_align;
2960         ay = (gdouble)pr->vis_height * y_align;
2961
2962         px = (gdouble)x * pr->scale - (pr->x_scroll + ax);
2963         py = (gdouble)y * pr->scale - (pr->y_scroll + ay);
2964
2965         pixbuf_renderer_scroll(pr, px, py);
2966 }
2967
2968 /* get or set coordinates of viewport center in the image, in range 0.0 - 1.0 */
2969
2970 void pixbuf_renderer_get_scroll_center(PixbufRenderer *pr, gdouble *x, gdouble *y)
2971 {
2972         gint src_x, src_y;
2973
2974         src_x = pr->x_scroll + pr->vis_width / 2;
2975         src_y = pr->y_scroll + pr->vis_height / 2;
2976
2977         *x = (gdouble)src_x / pr->width;
2978         *y = (gdouble)src_y / pr->height;
2979 }
2980
2981 void pixbuf_renderer_set_scroll_center(PixbufRenderer *pr, gdouble x, gdouble y)
2982 {
2983         gdouble dst_x, dst_y;
2984
2985         dst_x = x * pr->width  - pr->vis_width  / 2 - pr->x_scroll + CLAMP(pr->subpixel_x_scroll, -1.0, 1.0);
2986         dst_y = y * pr->height - pr->vis_height / 2 - pr->y_scroll + CLAMP(pr->subpixel_y_scroll, -1.0, 1.0);
2987
2988         pr->subpixel_x_scroll = dst_x - (int)dst_x;
2989         pr->subpixel_y_scroll = dst_y - (int)dst_y;
2990
2991         pixbuf_renderer_scroll(pr, (int)dst_x, (int)dst_y);
2992 }
2993
2994
2995 /*
2996  *-------------------------------------------------------------------
2997  * mouse
2998  *-------------------------------------------------------------------
2999  */
3000
3001 static gint pr_mouse_motion_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
3002 {
3003         PixbufRenderer *pr;
3004         gint accel;
3005
3006         pr = PIXBUF_RENDERER(widget);
3007
3008         if (pr->scroller_id != -1)
3009                 {
3010                 pr->scroller_xpos = bevent->x;
3011                 pr->scroller_ypos = bevent->y;
3012                 }
3013
3014         if (!pr->in_drag || !gdk_pointer_is_grabbed()) return FALSE;
3015
3016         if (pr->drag_moved < PR_DRAG_SCROLL_THRESHHOLD)
3017                 {
3018                 pr->drag_moved++;
3019                 }
3020         else
3021                 {
3022                 widget_set_cursor(widget, GDK_FLEUR);
3023                 }
3024
3025         if (bevent->state & GDK_SHIFT_MASK)
3026                 {
3027                 accel = PR_PAN_SHIFT_MULTIPLIER;
3028                 }
3029         else
3030                 {
3031                 accel = 1;
3032                 }
3033
3034         /* do the scroll */
3035         pixbuf_renderer_scroll(pr, (pr->drag_last_x - bevent->x) * accel,
3036                                (pr->drag_last_y - bevent->y) * accel);
3037
3038         pr_drag_signal(pr, bevent);
3039
3040         pr->drag_last_x = bevent->x;
3041         pr->drag_last_y = bevent->y;
3042
3043         return FALSE;
3044 }
3045
3046 static gint pr_mouse_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
3047 {
3048         PixbufRenderer *pr;
3049         GtkWidget *parent;
3050
3051         pr = PIXBUF_RENDERER(widget);
3052
3053         if (pr->scroller_id != -1) return TRUE;
3054
3055         switch (bevent->button)
3056                 {
3057                 case 1:
3058                         pr->in_drag = TRUE;
3059                         pr->drag_last_x = bevent->x;
3060                         pr->drag_last_y = bevent->y;
3061                         pr->drag_moved = 0;
3062                         gdk_pointer_grab(widget->window, FALSE,
3063                                          GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
3064                                          NULL, NULL, bevent->time);
3065                         gtk_grab_add(widget);
3066                         break;
3067                 case 2:
3068                         pr->drag_moved = 0;
3069                         break;
3070                 case 3:
3071                         pr_clicked_signal(pr, bevent);
3072                         break;
3073                 default:
3074                         break;
3075                 }
3076
3077         parent = gtk_widget_get_parent(widget);
3078         if (widget && GTK_WIDGET_CAN_FOCUS(parent))
3079                 {
3080                 gtk_widget_grab_focus(parent);
3081                 }
3082
3083         return FALSE;
3084 }
3085
3086 static gint pr_mouse_release_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
3087 {
3088         PixbufRenderer *pr;
3089
3090         pr = PIXBUF_RENDERER(widget);
3091
3092         if (pr->scroller_id != -1)
3093                 {
3094                 pr_scroller_stop(pr);
3095                 return TRUE;
3096                 }
3097
3098         if (gdk_pointer_is_grabbed() && GTK_WIDGET_HAS_GRAB(pr))
3099                 {
3100                 gtk_grab_remove(widget);
3101                 gdk_pointer_ungrab(bevent->time);
3102                 widget_set_cursor(widget, -1);
3103                 }
3104
3105         if (pr->drag_moved < PR_DRAG_SCROLL_THRESHHOLD)
3106                 {
3107                 if (bevent->button == 1 && (bevent->state & GDK_SHIFT_MASK))
3108                         {
3109                         pr_scroller_start(pr, bevent->x, bevent->y);
3110                         }
3111                 else if (bevent->button == 1 || bevent->button == 2)
3112                         {
3113                         pr_clicked_signal(pr, bevent);
3114                         }
3115                 }
3116
3117         pr->in_drag = FALSE;
3118
3119         return FALSE;
3120 }
3121
3122 static gint pr_mouse_leave_cb(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
3123 {
3124         PixbufRenderer *pr;
3125
3126         pr = PIXBUF_RENDERER(widget);
3127
3128         if (pr->scroller_id != -1)
3129                 {
3130                 pr->scroller_xpos = pr->scroller_x;
3131                 pr->scroller_ypos = pr->scroller_y;
3132                 pr->scroller_xinc = 0;
3133                 pr->scroller_yinc = 0;
3134                 }
3135
3136         return FALSE;
3137 }
3138
3139 static void pr_mouse_drag_cb(GtkWidget *widget, GdkDragContext *context, gpointer data)
3140 {
3141         PixbufRenderer *pr;
3142
3143         pr = PIXBUF_RENDERER(widget);
3144
3145         pr->drag_moved = PR_DRAG_SCROLL_THRESHHOLD;
3146 }
3147
3148 static void pr_signals_connect(PixbufRenderer *pr)
3149 {
3150         g_signal_connect(G_OBJECT(pr), "motion_notify_event",
3151                          G_CALLBACK(pr_mouse_motion_cb), pr);
3152         g_signal_connect(G_OBJECT(pr), "button_press_event",
3153                          G_CALLBACK(pr_mouse_press_cb), pr);
3154         g_signal_connect(G_OBJECT(pr), "button_release_event",
3155                          G_CALLBACK(pr_mouse_release_cb), pr);
3156         g_signal_connect(G_OBJECT(pr), "leave_notify_event",
3157                          G_CALLBACK(pr_mouse_leave_cb), pr);
3158
3159         gtk_widget_set_events(GTK_WIDGET(pr), GDK_POINTER_MOTION_MASK |
3160                                               GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK |
3161                                               GDK_LEAVE_NOTIFY_MASK);
3162
3163         g_signal_connect(G_OBJECT(pr), "drag_begin",
3164                          G_CALLBACK(pr_mouse_drag_cb), pr);
3165
3166 }
3167
3168 /*
3169  *-------------------------------------------------------------------
3170  * public
3171  *-------------------------------------------------------------------
3172  */
3173
3174 static void pr_pixbuf_sync(PixbufRenderer *pr, gdouble zoom)
3175 {
3176         if (!pr->pixbuf)
3177                 {
3178                 GtkWidget *box;
3179
3180                 /* no pixbuf so just clear the window */
3181                 pr->image_width = 0;
3182                 pr->image_height = 0;
3183                 pr->scale = 1.0;
3184
3185                 box = GTK_WIDGET(pr);
3186
3187                 if (GTK_WIDGET_REALIZED(box))
3188                         {
3189                         gdk_window_clear(box->window);
3190                         pr_overlay_draw(pr, 0, 0, pr->window_width, pr->window_height, NULL);
3191                         }
3192
3193                 pr_update_signal(pr);
3194
3195                 return;
3196                 }
3197
3198         pr->image_width = gdk_pixbuf_get_width(pr->pixbuf);
3199         pr->image_height = gdk_pixbuf_get_height(pr->pixbuf);
3200
3201         pr_zoom_sync(pr, zoom, TRUE, TRUE, FALSE, 0, 0);
3202 }
3203
3204 static void pr_set_pixbuf(PixbufRenderer *pr, GdkPixbuf *pixbuf, gdouble zoom)
3205 {
3206         if (pixbuf) g_object_ref(pixbuf);
3207         if (pr->pixbuf) g_object_unref(pr->pixbuf);
3208         pr->pixbuf = pixbuf;
3209
3210         pr_pixbuf_sync(pr, zoom);
3211 }
3212
3213 void pixbuf_renderer_set_pixbuf(PixbufRenderer *pr, GdkPixbuf *pixbuf, gdouble zoom)
3214 {
3215         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
3216
3217         pr_source_tile_unset(pr);
3218
3219         pr_set_pixbuf(pr, pixbuf, zoom);
3220
3221         pr_update_signal(pr);
3222 }
3223
3224 GdkPixbuf *pixbuf_renderer_get_pixbuf(PixbufRenderer *pr)
3225 {
3226         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), NULL);
3227
3228         return pr->pixbuf;
3229 }
3230
3231 void pixbuf_renderer_move(PixbufRenderer *pr, PixbufRenderer *source)
3232 {
3233         GObject *object;
3234         PixbufRendererScrollResetType scroll_reset;
3235
3236         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
3237         g_return_if_fail(IS_PIXBUF_RENDERER(source));
3238
3239         if (pr == source) return;
3240
3241         object = G_OBJECT(pr);
3242
3243         g_object_set(object, "zoom_min", source->zoom_min, NULL);
3244         g_object_set(object, "zoom_max", source->zoom_max, NULL);
3245         g_object_set(object, "loading", source->loading, NULL);
3246
3247         pr->complete = source->complete;
3248
3249         pr->x_scroll = source->x_scroll;
3250         pr->y_scroll = source->y_scroll;
3251
3252         scroll_reset = pr->scroll_reset;
3253         pr->scroll_reset = PR_SCROLL_RESET_NOCHANGE;
3254
3255         if (source->source_tiles_enabled)
3256                 {
3257                 pr_source_tile_unset(pr);
3258
3259                 pr->source_tiles_enabled = source->source_tiles_enabled;
3260                 pr->source_tiles_cache_size = source->source_tiles_cache_size;
3261                 pr->source_tile_width = source->source_tile_width;
3262                 pr->source_tile_height = source->source_tile_height;
3263                 pr->image_width = source->image_width;
3264                 pr->image_height = source->image_height;
3265
3266                 pr->func_tile_request = source->func_tile_request;
3267                 pr->func_tile_dispose = source->func_tile_dispose;
3268                 pr->func_tile_data = source->func_tile_data;
3269
3270                 pr->source_tiles = source->source_tiles;
3271                 source->source_tiles = NULL;
3272
3273                 pr_zoom_sync(pr, source->zoom, TRUE, TRUE, FALSE, 0, 0);
3274                 pr_redraw(pr, TRUE);
3275                 }
3276         else
3277                 {
3278                 pixbuf_renderer_set_pixbuf(pr, source->pixbuf, source->zoom);
3279                 }
3280
3281         pr->scroll_reset = scroll_reset;
3282
3283         pixbuf_renderer_set_pixbuf(source, NULL, source->zoom);
3284         pr_queue_clear(source);
3285         pr_tile_free_all(source);
3286 }
3287
3288 void pixbuf_renderer_area_changed(PixbufRenderer *pr, gint x, gint y, gint width, gint height)
3289 {
3290         gint x1, y1, x2, y2;
3291
3292         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
3293
3294         if (pr->source_tiles_enabled)
3295                 {
3296                 pr_source_tile_changed(pr, x, y, width, height);
3297                 }
3298
3299         if (pr->scale != 1.0 && pr->zoom_quality != GDK_INTERP_NEAREST)
3300                 {
3301                 /* increase region when using a zoom quality that may access surrounding pixels */
3302                 y -= 1;
3303                 height += 2;
3304                 }
3305
3306         x1 = (gint)floor((double)x * pr->scale);
3307         y1 = (gint)floor((double)y * pr->scale);
3308         x2 = (gint)ceil((double)(x + width) * pr->scale);
3309         y2 = (gint)ceil((double)(y + height) * pr->scale);
3310
3311         pr_queue(pr, x1, y1, x2 - x1, y2 - y1, FALSE, TILE_RENDER_AREA, TRUE, TRUE);
3312 }
3313
3314 void pixbuf_renderer_zoom_adjust(PixbufRenderer *pr, gdouble increment)
3315 {
3316         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
3317
3318         pr_zoom_adjust_real(pr, increment, FALSE, 0, 0);
3319 }
3320
3321 void pixbuf_renderer_zoom_adjust_at_point(PixbufRenderer *pr, gdouble increment, gint x, gint y)
3322 {
3323         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
3324
3325         pr_zoom_adjust_real(pr, increment, TRUE, x, y);
3326 }
3327
3328 void pixbuf_renderer_zoom_set(PixbufRenderer *pr, gdouble zoom)
3329 {
3330         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
3331
3332         pr_zoom_sync(pr, zoom, FALSE, FALSE, FALSE, 0, 0);
3333 }
3334
3335 gdouble pixbuf_renderer_zoom_get(PixbufRenderer *pr)
3336 {
3337         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), 1.0);
3338
3339         return pr->zoom;
3340 }
3341
3342 gdouble pixbuf_renderer_zoom_get_scale(PixbufRenderer *pr)
3343 {
3344         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), 1.0);
3345
3346         return pr->scale;
3347 }
3348
3349 void pixbuf_renderer_zoom_set_limits(PixbufRenderer *pr, gdouble min, gdouble max)
3350 {
3351         g_return_if_fail(IS_PIXBUF_RENDERER(pr));
3352
3353         if (min > 1.0 || max < 1.0) return;
3354         if (min < 1.0 && min > -1.0) return;
3355         if (min < -200.0 || max > 200.0) return;
3356
3357         if (pr->zoom_min != min)
3358                 {
3359                 pr->zoom_min = min;
3360                 g_object_notify(G_OBJECT(pr), "zoom_min");
3361                 }
3362         if (pr->zoom_max != max)
3363                 {
3364                 pr->zoom_max = max;
3365                 g_object_notify(G_OBJECT(pr), "zoom_max");
3366                 }
3367 }
3368
3369 gint pixbuf_renderer_get_image_size(PixbufRenderer *pr, gint *width, gint *height)
3370 {
3371         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
3372         g_return_val_if_fail(width != NULL && height != NULL, FALSE);
3373
3374         if (!pr->pixbuf && !pr->source_tiles_enabled)
3375                 {
3376                 *width = 0;
3377                 *height = 0;
3378                 return FALSE;
3379                 }
3380
3381         *width = pr->image_width;
3382         *height = pr->image_height;
3383         return TRUE;
3384 }
3385
3386 gint pixbuf_renderer_get_scaled_size(PixbufRenderer *pr, gint *width, gint *height)
3387 {
3388         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
3389         g_return_val_if_fail(width != NULL && height != NULL, FALSE);
3390
3391         if (!pr->pixbuf && !pr->source_tiles_enabled)
3392                 {
3393                 *width = 0;
3394                 *height = 0;
3395                 return FALSE;
3396                 }
3397
3398         *width = pr->width;
3399         *height = pr->height;
3400         return TRUE;
3401 }
3402
3403 gint pixbuf_renderer_get_visible_rect(PixbufRenderer *pr, GdkRectangle *rect)
3404 {
3405         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
3406         g_return_val_if_fail(rect != NULL, FALSE);
3407
3408         if ((!pr->pixbuf && !pr->source_tiles_enabled) ||
3409             !pr->scale)
3410                 {
3411                 rect->x = 0;
3412                 rect->y = 0;
3413                 rect->width = 0;
3414                 rect->height = 0;
3415                 return FALSE;
3416                 }
3417
3418         rect->x = (gint)((gdouble)pr->x_scroll / pr->scale);
3419         rect->y = (gint)((gdouble)pr->y_scroll / pr->scale);
3420         rect->width = (gint)((gdouble)pr->vis_width / pr->scale);
3421         rect->height = (gint)((gdouble)pr->vis_height / pr->scale);
3422         return TRUE;
3423 }
3424
3425 gint pixbuf_renderer_get_virtual_rect(PixbufRenderer *pr, GdkRectangle *rect)
3426 {
3427         g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
3428         g_return_val_if_fail(rect != NULL, FALSE);
3429
3430         if ((!pr->pixbuf && !pr->source_tiles_enabled))
3431                 {
3432                 rect->x = 0;
3433                 rect->y = 0;
3434                 rect->width = 0;
3435                 rect->height = 0;
3436                 return FALSE;
3437                 }
3438
3439         rect->x = pr->x_scroll;
3440         rect->y = pr->y_scroll;
3441         rect->width = pr->vis_width;
3442         rect->height = pr->vis_height;
3443         return TRUE;
3444 }
3445
3446