src/pixbuf-renderer.c

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