libview/ev-pixbuf-cache.c

   1 #include <config.h>
   2 #include "ev-pixbuf-cache.h"
   3 #include "ev-job-scheduler.h"
   4 #include "ev-mapping.h"
   5 #include "ev-document-forms.h"
   6 #include "ev-document-images.h"
   7 #include "ev-document-annotations.h"
   8 #include "ev-view-private.h"
   9
  10 typedef struct _CacheJobInfo
  11 {
  12         EvJob *job;
  13         EvRenderContext *rc;
  14         gboolean page_ready;
  15
  16         /* Region of the page that needs to be drawn */
  17         GdkRegion *region;
  18
  19         /* Data we get from rendering */
  20         cairo_surface_t *surface;
  21
  22         /* Selection data.
  23          * Selection_points are the coordinates encapsulated in selection.
  24          * target_points is the target selection size. */
  25         EvRectangle      selection_points;
  26         EvRectangle      target_points;
  27         EvSelectionStyle selection_style;
  28         gboolean         points_set;
  29
  30         cairo_surface_t *selection;
  31         GdkRegion *selection_region;
  32 } CacheJobInfo;
  33
  34 struct _EvPixbufCache
  35 {
  36         GObject parent;
  37
  38         /* We keep a link to our containing view just for style information. */
  39         GtkWidget *view;
  40         EvDocument *document;
  41         int start_page;
  42         int end_page;
  43         gboolean inverted_colors;
  44
  45         /* preload_cache_size is the number of pages prior to the current
  46          * visible area that we cache.  It's normally 1, but could be 2 in the
  47          * case of twin pages.
  48          */
  49         int preload_cache_size;
  50         CacheJobInfo *prev_job;
  51         CacheJobInfo *job_list;
  52         CacheJobInfo *next_job;
  53 };
  54
  55 struct _EvPixbufCacheClass
  56 {
  57         GObjectClass parent_class;
  58
  59         void (* job_finished) (EvPixbufCache *pixbuf_cache);
  60 };
  61
  62
  63 enum
  64 {
  65         JOB_FINISHED,
  66         N_SIGNALS,
  67 };
  68
  69 static guint signals[N_SIGNALS] = {0, };
  70
  71 static void          ev_pixbuf_cache_init       (EvPixbufCache      *pixbuf_cache);
  72 static void          ev_pixbuf_cache_class_init (EvPixbufCacheClass *pixbuf_cache);
  73 static void          ev_pixbuf_cache_finalize   (GObject            *object);
  74 static void          ev_pixbuf_cache_dispose    (GObject            *object);
  75 static void          job_finished_cb            (EvJob              *job,
  76                                                  EvPixbufCache      *pixbuf_cache);
  77 static CacheJobInfo *find_job_cache             (EvPixbufCache      *pixbuf_cache,
  78                                                  int                 page);
  79 static gboolean      new_selection_surface_needed(EvPixbufCache      *pixbuf_cache,
  80                                                   CacheJobInfo       *job_info,
  81                                                   gint                page,
  82                                                   gfloat              scale);
  83
  84
  85 /* These are used for iterating through the prev and next arrays */
  86 #define FIRST_VISIBLE_PREV(pixbuf_cache) \
  87         (MAX (0, pixbuf_cache->preload_cache_size - pixbuf_cache->start_page))
  88 #define VISIBLE_NEXT_LEN(pixbuf_cache) \
  89         (MIN(pixbuf_cache->preload_cache_size, ev_document_get_n_pages (pixbuf_cache->document) - (1 + pixbuf_cache->end_page)))
  90 #define PAGE_CACHE_LEN(pixbuf_cache) \
  91         ((pixbuf_cache->end_page - pixbuf_cache->start_page) + 1)
  92
  93 G_DEFINE_TYPE (EvPixbufCache, ev_pixbuf_cache, G_TYPE_OBJECT)
  94
  95 static void
  96 ev_pixbuf_cache_init (EvPixbufCache *pixbuf_cache)
  97 {
  98         pixbuf_cache->start_page = 0;
  99         pixbuf_cache->end_page = 0;
 100         pixbuf_cache->job_list = g_new0 (CacheJobInfo, PAGE_CACHE_LEN (pixbuf_cache));
 101
 102         pixbuf_cache->preload_cache_size = 2;
 103         pixbuf_cache->prev_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 104         pixbuf_cache->next_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 105 }
 106
 107 static void
 108 ev_pixbuf_cache_class_init (EvPixbufCacheClass *class)
 109 {
 110         GObjectClass *object_class;
 111
 112         object_class = G_OBJECT_CLASS (class);
 113
 114         object_class->finalize = ev_pixbuf_cache_finalize;
 115         object_class->dispose = ev_pixbuf_cache_dispose;
 116
 117         signals[JOB_FINISHED] =
 118                 g_signal_new ("job-finished",
 119                               G_OBJECT_CLASS_TYPE (object_class),
 120                               G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 121                               G_STRUCT_OFFSET (EvPixbufCacheClass, job_finished),
 122                               NULL, NULL,
 123                               g_cclosure_marshal_VOID__POINTER,
 124                               G_TYPE_NONE, 1,
 125                               G_TYPE_POINTER);
 126 }
 127
 128 static void
 129 ev_pixbuf_cache_finalize (GObject *object)
 130 {
 131         EvPixbufCache *pixbuf_cache;
 132
 133         pixbuf_cache = EV_PIXBUF_CACHE (object);
 134
 135         g_free (pixbuf_cache->prev_job);
 136         g_free (pixbuf_cache->job_list);
 137         g_free (pixbuf_cache->next_job);
 138
 139         G_OBJECT_CLASS (ev_pixbuf_cache_parent_class)->finalize (object);
 140 }
 141
 142 static void
 143 dispose_cache_job_info (CacheJobInfo *job_info,
 144                         gpointer      data)
 145 {
 146         if (job_info == NULL)
 147                 return;
 148
 149         if (job_info->job) {
 150                 g_signal_handlers_disconnect_by_func (job_info->job,
 151                                                       G_CALLBACK (job_finished_cb),
 152                                                       data);
 153                 ev_job_cancel (job_info->job);
 154                 g_object_unref (job_info->job);
 155                 job_info->job = NULL;
 156         }
 157         if (job_info->surface) {
 158                 cairo_surface_destroy (job_info->surface);
 159                 job_info->surface = NULL;
 160         }
 161         if (job_info->region) {
 162                 gdk_region_destroy (job_info->region);
 163                 job_info->region = NULL;
 164         }
 165         if (job_info->selection) {
 166                 cairo_surface_destroy (job_info->selection);
 167                 job_info->selection = NULL;
 168         }
 169         if (job_info->selection_region) {
 170                 gdk_region_destroy (job_info->selection_region);
 171                 job_info->selection_region = NULL;
 172         }
 173         if (job_info->rc) {
 174                 g_object_unref (G_OBJECT (job_info->rc));
 175                 job_info->rc = NULL;
 176         }
 177
 178         job_info->points_set = FALSE;
 179 }
 180
 181 static void
 182 ev_pixbuf_cache_dispose (GObject *object)
 183 {
 184         EvPixbufCache *pixbuf_cache;
 185         int i;
 186
 187         pixbuf_cache = EV_PIXBUF_CACHE (object);
 188
 189         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 190                 dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 191                 dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 192         }
 193
 194         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 195                 dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
 196         }
 197
 198         G_OBJECT_CLASS (ev_pixbuf_cache_parent_class)->dispose (object);
 199 }
 200
 201
 202 EvPixbufCache *
 203 ev_pixbuf_cache_new (GtkWidget  *view,
 204                      EvDocument *document)
 205 {
 206         EvPixbufCache *pixbuf_cache;
 207
 208         pixbuf_cache = (EvPixbufCache *) g_object_new (EV_TYPE_PIXBUF_CACHE, NULL);
 209         /* This is a backlink, so we don't ref this */
 210         pixbuf_cache->view = view;
 211         pixbuf_cache->document = document;
 212
 213         return pixbuf_cache;
 214 }
 215
 216 static void
 217 copy_job_to_job_info (EvJobRender   *job_render,
 218                       CacheJobInfo  *job_info,
 219                       EvPixbufCache *pixbuf_cache)
 220 {
 221         if (job_info->rc == NULL) {
 222                 job_info->rc = ev_render_context_new (job_render->ev_page,
 223                                                       job_render->rotation,
 224                                                       job_render->scale);
 225         } else {
 226                 ev_render_context_set_page (job_info->rc, job_render->ev_page);
 227                 ev_render_context_set_rotation (job_info->rc, job_render->rotation);
 228                 ev_render_context_set_scale (job_info->rc, job_render->scale);
 229         }
 230
 231         if (job_info->surface) {
 232                 cairo_surface_destroy (job_info->surface);
 233         }
 234         job_info->surface = cairo_surface_reference (job_render->surface);
 235         if (pixbuf_cache->inverted_colors) {
 236                 ev_document_misc_invert_surface (job_info->surface);
 237         }
 238
 239         job_info->points_set = FALSE;
 240         if (job_render->include_selection) {
 241                 if (job_info->selection) {
 242                         cairo_surface_destroy (job_info->selection);
 243                         job_info->selection = NULL;
 244                 }
 245                 if (job_info->selection_region) {
 246                         gdk_region_destroy (job_info->selection_region);
 247                         job_info->selection_region = NULL;
 248                 }
 249
 250                 job_info->selection_points = job_render->selection_points;
 251                 job_info->selection_region = gdk_region_copy (job_render->selection_region);
 252                 job_info->selection = cairo_surface_reference (job_render->selection);
 253                 g_assert (job_info->selection_points.x1 >= 0);
 254                 job_info->points_set = TRUE;
 255         }
 256
 257         if (job_info->job) {
 258                 g_signal_handlers_disconnect_by_func (job_info->job,
 259                                                       G_CALLBACK (job_finished_cb),
 260                                                       pixbuf_cache);
 261                 ev_job_cancel (job_info->job);
 262                 g_object_unref (job_info->job);
 263                 job_info->job = NULL;
 264         }
 265
 266         job_info->page_ready = TRUE;
 267 }
 268
 269 static void
 270 job_finished_cb (EvJob         *job,
 271                  EvPixbufCache *pixbuf_cache)
 272 {
 273         CacheJobInfo *job_info;
 274         EvJobRender *job_render = EV_JOB_RENDER (job);
 275
 276         /* If the job is outside of our interest, we silently discard it */
 277         if ((job_render->page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size)) ||
 278             (job_render->page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))) {
 279                 g_object_unref (job);
 280                 return;
 281         }
 282
 283         job_info = find_job_cache (pixbuf_cache, job_render->page);
 284
 285         copy_job_to_job_info (job_render, job_info, pixbuf_cache);
 286         g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 287 }
 288
 289 /* This checks a job to see if the job would generate the right sized pixbuf
 290  * given a scale.  If it won't, it removes the job and clears it to NULL.
 291  */
 292 static void
 293 check_job_size_and_unref (EvPixbufCache *pixbuf_cache,
 294                           CacheJobInfo  *job_info,
 295                           gfloat         scale)
 296 {
 297         gint width, height;
 298
 299         g_assert (job_info);
 300
 301         if (job_info->job == NULL)
 302                 return;
 303
 304         _get_page_size_for_scale_and_rotation (job_info->job->document,
 305                                                EV_JOB_RENDER (job_info->job)->page,
 306                                                scale,
 307                                                EV_JOB_RENDER (job_info->job)->rotation,
 308                                                &width, &height);
 309         if (width == EV_JOB_RENDER (job_info->job)->target_width &&
 310             height == EV_JOB_RENDER (job_info->job)->target_height)
 311                 return;
 312
 313         g_signal_handlers_disconnect_by_func (job_info->job,
 314                                               G_CALLBACK (job_finished_cb),
 315                                               pixbuf_cache);
 316         ev_job_cancel (job_info->job);
 317         g_object_unref (job_info->job);
 318         job_info->job = NULL;
 319 }
 320
 321 /* Do all function that copies a job from an older cache to it's position in the
 322  * new cache.  It clears the old job if it doesn't have a place.
 323  */
 324 static void
 325 move_one_job (CacheJobInfo  *job_info,
 326               EvPixbufCache *pixbuf_cache,
 327               int            page,
 328               CacheJobInfo  *new_job_list,
 329               CacheJobInfo  *new_prev_job,
 330               CacheJobInfo  *new_next_job,
 331               int            start_page,
 332               int            end_page,
 333               gint           priority)
 334 {
 335         CacheJobInfo *target_page = NULL;
 336         int page_offset;
 337         gint new_priority;
 338
 339         if (page < (start_page - pixbuf_cache->preload_cache_size) ||
 340             page > (end_page + pixbuf_cache->preload_cache_size)) {
 341                 dispose_cache_job_info (job_info, pixbuf_cache);
 342                 return;
 343         }
 344
 345         /* find the target page to copy it over to. */
 346         if (page < start_page) {
 347                 page_offset = (page - (start_page - pixbuf_cache->preload_cache_size));
 348
 349                 g_assert (page_offset >= 0 &&
 350                           page_offset < pixbuf_cache->preload_cache_size);
 351                 target_page = new_prev_job + page_offset;
 352                 new_priority = EV_JOB_PRIORITY_LOW;
 353         } else if (page > end_page) {
 354                 page_offset = (page - (end_page + 1));
 355
 356                 g_assert (page_offset >= 0 &&
 357                           page_offset < pixbuf_cache->preload_cache_size);
 358                 target_page = new_next_job + page_offset;
 359                 new_priority = EV_JOB_PRIORITY_LOW;
 360         } else {
 361                 page_offset = page - start_page;
 362                 g_assert (page_offset >= 0 &&
 363                           page_offset <= ((end_page - start_page) + 1));
 364                 new_priority = EV_JOB_PRIORITY_URGENT;
 365                 target_page = new_job_list + page_offset;
 366         }
 367
 368         *target_page = *job_info;
 369         job_info->job = NULL;
 370         job_info->region = NULL;
 371         job_info->surface = NULL;
 372
 373         if (new_priority != priority && target_page->job) {
 374                 ev_job_scheduler_update_job (target_page->job, new_priority);
 375         }
 376 }
 377
 378 static void
 379 ev_pixbuf_cache_update_range (EvPixbufCache *pixbuf_cache,
 380                               gint           start_page,
 381                               gint           end_page)
 382 {
 383         CacheJobInfo *new_job_list;
 384         CacheJobInfo *new_prev_job;
 385         CacheJobInfo *new_next_job;
 386         int i, page;
 387
 388         if (pixbuf_cache->start_page == start_page &&
 389             pixbuf_cache->end_page == end_page)
 390                 return;
 391
 392         new_job_list = g_new0 (CacheJobInfo, (end_page - start_page) + 1);
 393         new_prev_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 394         new_next_job = g_new0 (CacheJobInfo, pixbuf_cache->preload_cache_size);
 395
 396         /* We go through each job in the old cache and either clear it or move
 397          * it to a new location. */
 398
 399         /* Start with the prev cache. */
 400         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
 401         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 402                 if (page < 0) {
 403                         dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 404                 } else {
 405                         move_one_job (pixbuf_cache->prev_job + i,
 406                                       pixbuf_cache, page,
 407                                       new_job_list, new_prev_job, new_next_job,
 408                                       start_page, end_page, EV_JOB_PRIORITY_LOW);
 409                 }
 410                 page ++;
 411         }
 412
 413         page = pixbuf_cache->start_page;
 414         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 415                 move_one_job (pixbuf_cache->job_list + i,
 416                               pixbuf_cache, page,
 417                               new_job_list, new_prev_job, new_next_job,
 418                               start_page, end_page, EV_JOB_PRIORITY_URGENT);
 419                 page ++;
 420         }
 421
 422         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 423                 if (page >= ev_document_get_n_pages (pixbuf_cache->document)) {
 424                         dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 425                 } else {
 426                         move_one_job (pixbuf_cache->next_job + i,
 427                                       pixbuf_cache, page,
 428                                       new_job_list, new_prev_job, new_next_job,
 429                                       start_page, end_page, EV_JOB_PRIORITY_LOW);
 430                 }
 431                 page ++;
 432         }
 433
 434         g_free (pixbuf_cache->job_list);
 435         g_free (pixbuf_cache->prev_job);
 436         g_free (pixbuf_cache->next_job);
 437
 438         pixbuf_cache->job_list = new_job_list;
 439         pixbuf_cache->prev_job = new_prev_job;
 440         pixbuf_cache->next_job = new_next_job;
 441
 442         pixbuf_cache->start_page = start_page;
 443         pixbuf_cache->end_page = end_page;
 444 }
 445
 446 static CacheJobInfo *
 447 find_job_cache (EvPixbufCache *pixbuf_cache,
 448                 int            page)
 449 {
 450         int page_offset;
 451
 452         if (page < (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size) ||
 453             page > (pixbuf_cache->end_page + pixbuf_cache->preload_cache_size))
 454                 return NULL;
 455
 456         if (page < pixbuf_cache->start_page) {
 457                 page_offset = (page - (pixbuf_cache->start_page - pixbuf_cache->preload_cache_size));
 458
 459                 g_assert (page_offset >= 0 &&
 460                           page_offset < pixbuf_cache->preload_cache_size);
 461                 return pixbuf_cache->prev_job + page_offset;
 462         }
 463
 464         if (page > pixbuf_cache->end_page) {
 465                 page_offset = (page - (pixbuf_cache->end_page + 1));
 466
 467                 g_assert (page_offset >= 0 &&
 468                           page_offset < pixbuf_cache->preload_cache_size);
 469                 return pixbuf_cache->next_job + page_offset;
 470         }
 471
 472         page_offset = page - pixbuf_cache->start_page;
 473         g_assert (page_offset >= 0 &&
 474                   page_offset <= PAGE_CACHE_LEN(pixbuf_cache));
 475         return pixbuf_cache->job_list + page_offset;
 476 }
 477
 478 static void
 479 ev_pixbuf_cache_clear_job_sizes (EvPixbufCache *pixbuf_cache,
 480                                  gfloat         scale)
 481 {
 482         int i;
 483
 484         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 485                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->job_list + i, scale);
 486         }
 487
 488         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 489                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->prev_job + i, scale);
 490                 check_job_size_and_unref (pixbuf_cache, pixbuf_cache->next_job + i, scale);
 491         }
 492 }
 493
 494 static void
 495 get_selection_colors (GtkWidget *widget, GdkColor **text, GdkColor **base)
 496 {
 497     if (GTK_WIDGET_HAS_FOCUS (widget)) {
 498         *text = &widget->style->text [GTK_STATE_SELECTED];
 499         *base = &widget->style->base [GTK_STATE_SELECTED];
 500     } else {
 501         *text = &widget->style->text [GTK_STATE_ACTIVE];
 502         *base = &widget->style->base [GTK_STATE_ACTIVE];
 503     }
 504 }
 505
 506 static void
 507 add_job (EvPixbufCache *pixbuf_cache,
 508          CacheJobInfo  *job_info,
 509          GdkRegion     *region,
 510          gint           width,
 511          gint           height,
 512          gint           page,
 513          gint           rotation,
 514          gfloat         scale,
 515          EvJobPriority  priority)
 516 {
 517         job_info->page_ready = FALSE;
 518
 519         if (job_info->region)
 520                 gdk_region_destroy (job_info->region);
 521         job_info->region = region ? gdk_region_copy (region) : NULL;
 522
 523         job_info->job = ev_job_render_new (pixbuf_cache->document,
 524                                            page, rotation, scale,
 525                                            width, height);
 526
 527         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 528                 GdkColor *text, *base;
 529
 530                 gtk_widget_ensure_style (pixbuf_cache->view);
 531                 get_selection_colors (pixbuf_cache->view, &text, &base);
 532                 ev_job_render_set_selection_info (EV_JOB_RENDER (job_info->job),
 533                                                   &(job_info->target_points),
 534                                                   job_info->selection_style,
 535                                                   text, base);
 536         }
 537
 538         g_signal_connect (job_info->job, "finished",
 539                           G_CALLBACK (job_finished_cb),
 540                           pixbuf_cache);
 541         ev_job_scheduler_push_job (job_info->job, priority);
 542 }
 543
 544 static void
 545 add_job_if_needed (EvPixbufCache *pixbuf_cache,
 546                    CacheJobInfo  *job_info,
 547                    gint           page,
 548                    gint           rotation,
 549                    gfloat         scale,
 550                    EvJobPriority  priority)
 551 {
 552         gint width, height;
 553
 554         if (job_info->job)
 555                 return;
 556
 557         _get_page_size_for_scale_and_rotation (pixbuf_cache->document,
 558                                                page, scale, rotation,
 559                                                &width, &height);
 560
 561         if (job_info->surface &&
 562             cairo_image_surface_get_width (job_info->surface) == width &&
 563             cairo_image_surface_get_height (job_info->surface) == height)
 564                 return;
 565
 566         add_job (pixbuf_cache, job_info, NULL,
 567                  width, height, page, rotation, scale,
 568                  priority);
 569 }
 570
 571 static void
 572 ev_pixbuf_cache_add_jobs_if_needed (EvPixbufCache *pixbuf_cache,
 573                                     gint           rotation,
 574                                     gfloat         scale)
 575 {
 576         CacheJobInfo *job_info;
 577         int page;
 578         int i;
 579
 580         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 581                 job_info = (pixbuf_cache->job_list + i);
 582                 page = pixbuf_cache->start_page + i;
 583
 584                 add_job_if_needed (pixbuf_cache, job_info,
 585                                    page, rotation, scale,
 586                                    EV_JOB_PRIORITY_URGENT);
 587         }
 588
 589         for (i = FIRST_VISIBLE_PREV(pixbuf_cache); i < pixbuf_cache->preload_cache_size; i++) {
 590                 job_info = (pixbuf_cache->prev_job + i);
 591                 page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size + i;
 592
 593                 add_job_if_needed (pixbuf_cache, job_info,
 594                                    page, rotation, scale,
 595                                    EV_JOB_PRIORITY_LOW);
 596         }
 597
 598         for (i = 0; i < VISIBLE_NEXT_LEN(pixbuf_cache); i++) {
 599                 job_info = (pixbuf_cache->next_job + i);
 600                 page = pixbuf_cache->end_page + 1 + i;
 601
 602                 add_job_if_needed (pixbuf_cache, job_info,
 603                                    page, rotation, scale,
 604                                    EV_JOB_PRIORITY_LOW);
 605         }
 606
 607 }
 608
 609 void
 610 ev_pixbuf_cache_set_page_range (EvPixbufCache  *pixbuf_cache,
 611                                 gint            start_page,
 612                                 gint            end_page,
 613                                 gint            rotation,
 614                                 gfloat          scale,
 615                                 GList          *selection_list)
 616 {
 617         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
 618
 619         g_return_if_fail (start_page >= 0 && start_page < ev_document_get_n_pages (pixbuf_cache->document));
 620         g_return_if_fail (end_page >= 0 && end_page < ev_document_get_n_pages (pixbuf_cache->document));
 621         g_return_if_fail (end_page >= start_page);
 622
 623         /* First, resize the page_range as needed.  We cull old pages
 624          * mercilessly. */
 625         ev_pixbuf_cache_update_range (pixbuf_cache, start_page, end_page);
 626
 627         /* Then, we update the current jobs to see if any of them are the wrong
 628          * size, we remove them if we need to. */
 629         ev_pixbuf_cache_clear_job_sizes (pixbuf_cache, scale);
 630
 631         /* Next, we update the target selection for our pages */
 632         ev_pixbuf_cache_set_selection_list (pixbuf_cache, selection_list);
 633
 634         /* Finally, we add the new jobs for all the sizes that don't have a
 635          * pixbuf */
 636         ev_pixbuf_cache_add_jobs_if_needed (pixbuf_cache, rotation, scale);
 637 }
 638
 639 void
 640 ev_pixbuf_cache_set_inverted_colors (EvPixbufCache *pixbuf_cache,
 641                                      gboolean       inverted_colors)
 642 {
 643         gint i;
 644
 645         if (pixbuf_cache->inverted_colors == inverted_colors)
 646                 return;
 647
 648         pixbuf_cache->inverted_colors = inverted_colors;
 649
 650         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 651                 CacheJobInfo *job_info;
 652
 653                 job_info = pixbuf_cache->prev_job + i;
 654                 if (job_info->surface)
 655                         ev_document_misc_invert_surface (job_info->surface);
 656
 657                 job_info = pixbuf_cache->next_job + i;
 658                 if (job_info->surface)
 659                         ev_document_misc_invert_surface (job_info->surface);
 660         }
 661
 662         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 663                 CacheJobInfo *job_info;
 664
 665                 job_info = pixbuf_cache->job_list + i;
 666                 if (job_info->surface)
 667                         ev_document_misc_invert_surface (job_info->surface);
 668         }
 669 }
 670
 671 cairo_surface_t *
 672 ev_pixbuf_cache_get_surface (EvPixbufCache *pixbuf_cache,
 673                              gint           page)
 674 {
 675         CacheJobInfo *job_info;
 676
 677         job_info = find_job_cache (pixbuf_cache, page);
 678         if (job_info == NULL)
 679                 return NULL;
 680
 681         if (job_info->page_ready)
 682                 return job_info->surface;
 683
 684         /* We don't need to wait for the idle to handle the callback */
 685         if (job_info->job &&
 686             EV_JOB_RENDER (job_info->job)->page_ready) {
 687                 copy_job_to_job_info (EV_JOB_RENDER (job_info->job), job_info, pixbuf_cache);
 688                 g_signal_emit (pixbuf_cache, signals[JOB_FINISHED], 0, job_info->region);
 689         }
 690
 691         return job_info->surface;
 692 }
 693
 694 static gboolean
 695 new_selection_surface_needed (EvPixbufCache *pixbuf_cache,
 696                               CacheJobInfo  *job_info,
 697                               gint           page,
 698                               gfloat         scale)
 699 {
 700         if (job_info->selection && job_info->rc) {
 701                 gint width, height;
 702                 gint selection_width, selection_height;
 703
 704                 _get_page_size_for_scale_and_rotation (pixbuf_cache->document,
 705                                                        page, scale, job_info->rc->rotation,
 706                                                        &width, &height);
 707
 708                 selection_width = cairo_image_surface_get_width (job_info->selection);
 709                 selection_height = cairo_image_surface_get_height (job_info->selection);
 710
 711                 if (width != selection_width || height != selection_height)
 712                         return TRUE;
 713         } else {
 714                 if (job_info->points_set)
 715                         return TRUE;
 716         }
 717
 718         return FALSE;
 719 }
 720
 721 static void
 722 clear_selection_if_needed (EvPixbufCache *pixbuf_cache,
 723                            CacheJobInfo  *job_info,
 724                            gint           page,
 725                            gfloat         scale)
 726 {
 727         if (new_selection_surface_needed (pixbuf_cache, job_info, page, scale)) {
 728                 if (job_info->selection)
 729                         cairo_surface_destroy (job_info->selection);
 730                 job_info->selection = NULL;
 731                 job_info->selection_points.x1 = -1;
 732         }
 733 }
 734
 735 /* Clears the cache of jobs and pixbufs.
 736  */
 737 void
 738 ev_pixbuf_cache_clear (EvPixbufCache *pixbuf_cache)
 739 {
 740         int i;
 741
 742         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 743                 dispose_cache_job_info (pixbuf_cache->prev_job + i, pixbuf_cache);
 744                 dispose_cache_job_info (pixbuf_cache->next_job + i, pixbuf_cache);
 745         }
 746
 747         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 748                 dispose_cache_job_info (pixbuf_cache->job_list + i, pixbuf_cache);
 749         }
 750 }
 751
 752
 753 void
 754 ev_pixbuf_cache_style_changed (EvPixbufCache *pixbuf_cache)
 755 {
 756         gint i;
 757
 758         /* FIXME: doesn't update running jobs. */
 759         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 760                 CacheJobInfo *job_info;
 761
 762                 job_info = pixbuf_cache->prev_job + i;
 763                 if (job_info->selection) {
 764                         cairo_surface_destroy (job_info->selection);
 765                         job_info->selection = NULL;
 766                 }
 767
 768                 job_info = pixbuf_cache->next_job + i;
 769                 if (job_info->selection) {
 770                         cairo_surface_destroy (job_info->selection);
 771                         job_info->selection = NULL;
 772                 }
 773         }
 774
 775         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 776                 CacheJobInfo *job_info;
 777
 778                 job_info = pixbuf_cache->job_list + i;
 779                 if (job_info->selection) {
 780                         cairo_surface_destroy (job_info->selection);
 781                         job_info->selection = NULL;
 782                 }
 783         }
 784 }
 785
 786 cairo_surface_t *
 787 ev_pixbuf_cache_get_selection_surface (EvPixbufCache  *pixbuf_cache,
 788                                        gint            page,
 789                                        gfloat          scale,
 790                                        GdkRegion     **region)
 791 {
 792         CacheJobInfo *job_info;
 793
 794         /* the document does not implement the selection interface */
 795         if (!EV_IS_SELECTION (pixbuf_cache->document))
 796                 return NULL;
 797
 798         job_info = find_job_cache (pixbuf_cache, page);
 799         if (job_info == NULL)
 800                 return NULL;
 801
 802         /* No selection on this page */
 803         if (!job_info->points_set)
 804                 return NULL;
 805
 806         /* Create new render context if needed (selection + fast scrolling) */
 807         if (job_info->rc == NULL) {
 808                 EvPage  *ev_page;
 809                 ev_page = ev_document_get_page (pixbuf_cache->document, page);
 810                 job_info->rc = ev_render_context_new (ev_page, 0, scale);
 811                 g_object_unref (ev_page);
 812         }
 813
 814         /* Update the rc */
 815         ev_render_context_set_scale (job_info->rc, scale);
 816
 817         /* If we have a running job, we just return what we have under the
 818          * assumption that it'll be updated later and we can scale it as need
 819          * be */
 820         if (job_info->job && EV_JOB_RENDER (job_info->job)->include_selection)
 821                 return job_info->selection;
 822
 823         /* Now, lets see if we need to resize the image.  If we do, we clear the
 824          * old one. */
 825         clear_selection_if_needed (pixbuf_cache, job_info, page, scale);
 826
 827         /* Finally, we see if the two scales are the same, and get a new pixbuf
 828          * if needed.  We do this synchronously for now.  At some point, we
 829          * _should_ be able to get rid of the doc_mutex, so the synchronicity
 830          * doesn't kill us.  Rendering a few glyphs should really be fast.
 831          */
 832         if (ev_rect_cmp (&(job_info->target_points), &(job_info->selection_points))) {
 833                 EvRectangle *old_points;
 834                 GdkColor *text, *base;
 835
 836                 /* we need to get a new selection pixbuf */
 837                 ev_document_doc_mutex_lock ();
 838                 if (job_info->selection_points.x1 < 0) {
 839                         g_assert (job_info->selection == NULL);
 840                         old_points = NULL;
 841                 } else {
 842                         g_assert (job_info->selection != NULL);
 843                         old_points = &(job_info->selection_points);
 844                 }
 845
 846                 if (job_info->selection_region)
 847                         gdk_region_destroy (job_info->selection_region);
 848                 job_info->selection_region =
 849                         ev_selection_get_selection_region (EV_SELECTION (pixbuf_cache->document),
 850                                                            job_info->rc,
 851                                                            job_info->selection_style,
 852                                                            &(job_info->target_points));
 853
 854                 gtk_widget_ensure_style (pixbuf_cache->view);
 855
 856                 get_selection_colors (pixbuf_cache->view, &text, &base);
 857
 858                 ev_selection_render_selection (EV_SELECTION (pixbuf_cache->document),
 859                                                job_info->rc, &(job_info->selection),
 860                                                &(job_info->target_points),
 861                                                old_points,
 862                                                job_info->selection_style,
 863                                                text, base);
 864                 job_info->selection_points = job_info->target_points;
 865                 ev_document_doc_mutex_unlock ();
 866         }
 867         if (region)
 868                 *region = job_info->selection_region;
 869         return job_info->selection;
 870 }
 871
 872 static void
 873 update_job_selection (CacheJobInfo    *job_info,
 874                       EvViewSelection *selection)
 875 {
 876         job_info->points_set = TRUE;
 877         job_info->target_points = selection->rect;
 878         job_info->selection_style = selection->style;
 879 }
 880
 881 static void
 882 clear_job_selection (CacheJobInfo *job_info)
 883 {
 884         job_info->points_set = FALSE;
 885         job_info->selection_points.x1 = -1;
 886
 887         if (job_info->selection) {
 888                 cairo_surface_destroy (job_info->selection);
 889                 job_info->selection = NULL;
 890         }
 891 }
 892
 893 /* This function will reset the selection on pages that no longer have them, and
 894  * will update the target_selection on those that need it.  It will _not_ free
 895  * the previous selection_list -- that's up to caller to do.
 896  */
 897 void
 898 ev_pixbuf_cache_set_selection_list (EvPixbufCache *pixbuf_cache,
 899                                     GList         *selection_list)
 900 {
 901         EvViewSelection *selection;
 902         GList *list = selection_list;
 903         int page;
 904         int i;
 905
 906         g_return_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache));
 907
 908         if (!EV_IS_SELECTION (pixbuf_cache->document))
 909                 return;
 910
 911         /* We check each area to see what needs updating, and what needs freeing; */
 912         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
 913         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 914                 if (page < 0) {
 915                         page ++;
 916                         continue;
 917                 }
 918
 919                 selection = NULL;
 920                 while (list) {
 921                         if (((EvViewSelection *)list->data)->page == page) {
 922                                 selection = list->data;
 923                                 break;
 924                         } else if (((EvViewSelection *)list->data)->page > page)
 925                                 break;
 926                         list = list->next;
 927                 }
 928
 929                 if (selection)
 930                         update_job_selection (pixbuf_cache->prev_job + i, selection);
 931                 else
 932                         clear_job_selection (pixbuf_cache->prev_job + i);
 933                 page ++;
 934         }
 935
 936         page = pixbuf_cache->start_page;
 937         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
 938                 selection = NULL;
 939                 while (list) {
 940                         if (((EvViewSelection *)list->data)->page == page) {
 941                                 selection = list->data;
 942                                 break;
 943                         } else if (((EvViewSelection *)list->data)->page > page)
 944                                 break;
 945                         list = list->next;
 946                 }
 947
 948                 if (selection)
 949                         update_job_selection (pixbuf_cache->job_list + i, selection);
 950                 else
 951                         clear_job_selection (pixbuf_cache->job_list + i);
 952                 page ++;
 953         }
 954
 955         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 956                 if (page >= ev_document_get_n_pages (pixbuf_cache->document))
 957                         break;
 958
 959                 selection = NULL;
 960                 while (list) {
 961                         if (((EvViewSelection *)list->data)->page == page) {
 962                                 selection = list->data;
 963                                 break;
 964                         } else if (((EvViewSelection *)list->data)->page > page)
 965                                 break;
 966                         list = list->next;
 967                 }
 968
 969                 if (selection)
 970                         update_job_selection (pixbuf_cache->next_job + i, selection);
 971                 else
 972                         clear_job_selection (pixbuf_cache->next_job + i);
 973                 page ++;
 974         }
 975 }
 976
 977
 978 /* Returns what the pixbuf cache thinks is */
 979
 980 GList *
 981 ev_pixbuf_cache_get_selection_list (EvPixbufCache *pixbuf_cache)
 982 {
 983         EvViewSelection *selection;
 984         GList *retval = NULL;
 985         int page;
 986         int i;
 987
 988         g_return_val_if_fail (EV_IS_PIXBUF_CACHE (pixbuf_cache), NULL);
 989
 990         /* We check each area to see what needs updating, and what needs freeing; */
 991         page = pixbuf_cache->start_page - pixbuf_cache->preload_cache_size;
 992         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
 993                 if (page < 0) {
 994                         page ++;
 995                         continue;
 996                 }
 997
 998                 if (pixbuf_cache->prev_job[i].selection_points.x1 != -1) {
 999                         selection = g_new0 (EvViewSelection, 1);
1000                         selection->page = page;
1001                         selection->rect = pixbuf_cache->prev_job[i].selection_points;
1002                         if (pixbuf_cache->prev_job[i].selection_region)
1003                                 selection->covered_region = gdk_region_copy (pixbuf_cache->prev_job[i].selection_region);
1004                         retval = g_list_append (retval, selection);
1005                 }
1006
1007                 page ++;
1008         }
1009
1010         page = pixbuf_cache->start_page;
1011         for (i = 0; i < PAGE_CACHE_LEN (pixbuf_cache); i++) {
1012                 if (pixbuf_cache->job_list[i].selection_points.x1 != -1) {
1013                         selection = g_new0 (EvViewSelection, 1);
1014                         selection->page = page;
1015                         selection->rect = pixbuf_cache->job_list[i].selection_points;
1016                         if (pixbuf_cache->job_list[i].selection_region)
1017                                 selection->covered_region = gdk_region_copy (pixbuf_cache->job_list[i].selection_region);
1018                         retval = g_list_append (retval, selection);
1019                 }
1020
1021                 page ++;
1022         }
1023
1024         for (i = 0; i < pixbuf_cache->preload_cache_size; i++) {
1025                 if (page >= ev_document_get_n_pages (pixbuf_cache->document))
1026                         break;
1027
1028                 if (pixbuf_cache->next_job[i].selection_points.x1 != -1) {
1029                         selection = g_new0 (EvViewSelection, 1);
1030                         selection->page = page;
1031                         selection->rect = pixbuf_cache->next_job[i].selection_points;
1032                         if (pixbuf_cache->next_job[i].selection_region)
1033                                 selection->covered_region = gdk_region_copy (pixbuf_cache->next_job[i].selection_region);
1034                         retval = g_list_append (retval, selection);
1035                 }
1036
1037                 page ++;
1038         }
1039
1040         return retval;
1041 }
1042
1043 void
1044 ev_pixbuf_cache_reload_page (EvPixbufCache *pixbuf_cache,
1045                              GdkRegion     *region,
1046                              gint           page,
1047                              gint           rotation,
1048                              gdouble        scale)
1049 {
1050         CacheJobInfo *job_info;
1051         gint width, height;
1052
1053         job_info = find_job_cache (pixbuf_cache, page);
1054         if (job_info == NULL)
1055                 return;
1056
1057         _get_page_size_for_scale_and_rotation (pixbuf_cache->document,
1058                                                page, scale, rotation,
1059                                                &width, &height);
1060         add_job (pixbuf_cache, job_info, region,
1061                  width, height, page, rotation, scale,
1062                  EV_JOB_PRIORITY_URGENT);
1063 }
1064
1065