src/display/canvas-arena.cpp

   1 #define __SP_CANVAS_ARENA_C__
   2
   3 /*
   4  * RGBA display list system for inkscape
   5  *
   6  * Author:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *
   9  * Copyright (C) 2001-2002 Lauris Kaplinski
  10  * Copyright (C) 2001 Ximian, Inc.
  11  *
  12  * Released under GNU GPL, read the file 'COPYING' for more information
  13  */
  14
  15 #include <libnr/nr-blit.h>
  16 #include <gtk/gtksignal.h>
  17
  18 #include <display/display-forward.h>
  19 #include <display/sp-canvas-util.h>
  20 #include <helper/sp-marshal.h>
  21 #include <display/nr-arena.h>
  22 #include <display/nr-arena-group.h>
  23 #include <display/canvas-arena.h>
  24
  25 enum {
  26         ARENA_EVENT,
  27         LAST_SIGNAL
  28 };
  29
  30 static void sp_canvas_arena_class_init(SPCanvasArenaClass *klass);
  31 static void sp_canvas_arena_init(SPCanvasArena *group);
  32 static void sp_canvas_arena_destroy(GtkObject *object);
  33
  34 static void sp_canvas_arena_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags);
  35 static void sp_canvas_arena_render (SPCanvasItem *item, SPCanvasBuf *buf);
  36 static double sp_canvas_arena_point (SPCanvasItem *item, NR::Point p, SPCanvasItem **actual_item);
  37 static gint sp_canvas_arena_event (SPCanvasItem *item, GdkEvent *event);
  38
  39 static gint sp_canvas_arena_send_event (SPCanvasArena *arena, GdkEvent *event);
  40
  41 static void sp_canvas_arena_request_update (NRArena *arena, NRArenaItem *item, void *data);
  42 static void sp_canvas_arena_request_render (NRArena *arena, NRRectL *area, void *data);
  43
  44 NRArenaEventVector carenaev = {
  45         {NULL},
  46         sp_canvas_arena_request_update,
  47         sp_canvas_arena_request_render
  48 };
  49
  50 static SPCanvasItemClass *parent_class;
  51 static guint signals[LAST_SIGNAL] = {0};
  52
  53 GtkType
  54 sp_canvas_arena_get_type (void)
  55 {
  56         static GtkType type = 0;
  57         if (!type) {
  58                 GtkTypeInfo info = {
  59                         "SPCanvasArena",
  60                         sizeof (SPCanvasArena),
  61                         sizeof (SPCanvasArenaClass),
  62                         (GtkClassInitFunc) sp_canvas_arena_class_init,
  63                         (GtkObjectInitFunc) sp_canvas_arena_init,
  64                         NULL, NULL, NULL
  65                 };
  66                 type = gtk_type_unique (SP_TYPE_CANVAS_ITEM, &info);
  67         }
  68         return type;
  69 }
  70
  71 static void
  72 sp_canvas_arena_class_init (SPCanvasArenaClass *klass)
  73 {
  74         GtkObjectClass *object_class;
  75         SPCanvasItemClass *item_class;
  76
  77         object_class = (GtkObjectClass *) klass;
  78         item_class = (SPCanvasItemClass *) klass;
  79
  80         parent_class = (SPCanvasItemClass*)gtk_type_class (SP_TYPE_CANVAS_ITEM);
  81
  82         signals[ARENA_EVENT] = gtk_signal_new ("arena_event",
  83                                                GTK_RUN_LAST,
  84                                                GTK_CLASS_TYPE(object_class),
  85                                                GTK_SIGNAL_OFFSET (SPCanvasArenaClass, arena_event),
  86                                                sp_marshal_INT__POINTER_POINTER,
  87                                                GTK_TYPE_INT, 2, GTK_TYPE_POINTER, GTK_TYPE_POINTER);
  88
  89         object_class->destroy = sp_canvas_arena_destroy;
  90
  91         item_class->update = sp_canvas_arena_update;
  92         item_class->render = sp_canvas_arena_render;
  93         item_class->point = sp_canvas_arena_point;
  94         item_class->event = sp_canvas_arena_event;
  95 }
  96
  97 static void
  98 sp_canvas_arena_init (SPCanvasArena *arena)
  99 {
 100         arena->sticky = FALSE;
 101
 102         arena->arena = NRArena::create();
 103         arena->root = NRArenaGroup::create(arena->arena);
 104         nr_arena_group_set_transparent (NR_ARENA_GROUP (arena->root), TRUE);
 105
 106         arena->active = NULL;
 107
 108         nr_active_object_add_listener ((NRActiveObject *) arena->arena, (NRObjectEventVector *) &carenaev, sizeof (carenaev), arena);
 109 }
 110
 111 static void
 112 sp_canvas_arena_destroy (GtkObject *object)
 113 {
 114         SPCanvasArena *arena = SP_CANVAS_ARENA (object);
 115
 116         if (arena->active) {
 117                 nr_object_unref ((NRObject *) arena->active);
 118                 arena->active = NULL;
 119         }
 120
 121         if (arena->root) {
 122                 nr_arena_item_unref (arena->root);
 123                 arena->root = NULL;
 124         }
 125
 126         if (arena->arena) {
 127                 nr_active_object_remove_listener_by_data ((NRActiveObject *) arena->arena, arena);
 128
 129                 nr_object_unref ((NRObject *) arena->arena);
 130                 arena->arena = NULL;
 131         }
 132
 133         if (GTK_OBJECT_CLASS (parent_class)->destroy)
 134                 (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
 135 }
 136
 137 static void
 138 sp_canvas_arena_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags)
 139 {
 140         SPCanvasArena *arena = SP_CANVAS_ARENA (item);
 141
 142         if (((SPCanvasItemClass *) parent_class)->update)
 143                 (* ((SPCanvasItemClass *) parent_class)->update) (item, affine, flags);
 144
 145         arena->gc.transform = affine;
 146
 147         guint reset;
 148         reset = (flags & SP_CANVAS_UPDATE_AFFINE)? NR_ARENA_ITEM_STATE_ALL : NR_ARENA_ITEM_STATE_NONE;
 149
 150         nr_arena_item_invoke_update (arena->root, NULL, &arena->gc, NR_ARENA_ITEM_STATE_ALL, reset);
 151
 152         item->x1 = arena->root->bbox.x0 - 1;
 153         item->y1 = arena->root->bbox.y0 - 1;
 154         item->x2 = arena->root->bbox.x1 + 1;
 155         item->y2 = arena->root->bbox.y1 + 1;
 156
 157         if (arena->cursor) {
 158                 /* Mess with enter/leave notifiers */
 159                 NRArenaItem *new_arena = nr_arena_item_invoke_pick (arena->root, arena->c, arena->arena->delta, arena->sticky);
 160                 if (new_arena != arena->active) {
 161                         GdkEventCrossing ec;
 162                         ec.window = GTK_WIDGET (item->canvas)->window;
 163                         ec.send_event = TRUE;
 164                         ec.subwindow = ec.window;
 165                         ec.time = GDK_CURRENT_TIME;
 166                         ec.x = arena->c[NR::X];
 167                         ec.y = arena->c[NR::Y];
 168                         /* fixme: */
 169                         if (arena->active) {
 170                                 ec.type = GDK_LEAVE_NOTIFY;
 171                                 sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);
 172                         }
 173                         /* fixme: This is not optimal - better track ::destroy (Lauris) */
 174                         if (arena->active) nr_object_unref ((NRObject *) arena->active);
 175                         arena->active = new_arena;
 176                         if (arena->active) nr_object_ref ((NRObject *) arena->active);
 177                         if (arena->active) {
 178                                 ec.type = GDK_ENTER_NOTIFY;
 179                                 sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);
 180                         }
 181                 }
 182         }
 183 }
 184
 185 static void
 186 sp_canvas_arena_render (SPCanvasItem *item, SPCanvasBuf *buf)
 187 {
 188         gint bw, bh, sw, sh;
 189         gint x, y;
 190
 191         SPCanvasArena *arena = SP_CANVAS_ARENA (item);
 192
 193         nr_arena_item_invoke_update (arena->root, NULL, &arena->gc,
 194                                      NR_ARENA_ITEM_STATE_BBOX | NR_ARENA_ITEM_STATE_RENDER,
 195                                      NR_ARENA_ITEM_STATE_NONE);
 196
 197         sp_canvas_prepare_buffer(buf);
 198
 199         bw = buf->rect.x1 - buf->rect.x0;
 200         bh = buf->rect.y1 - buf->rect.y0;
 201         if ((bw < 1) || (bh < 1)) return;
 202
 203         if (arena->arena->rendermode != RENDERMODE_OUTLINE) { // use 256K as a compromise to not slow down gradients
 204                 /* 256K is the cached buffer and we need 4 channels */
 205                 if (bw * bh < 65536) { // 256K/4
 206                         /* We can go with single buffer */
 207                         sw = bw;
 208                         sh = bh;
 209                 } else if (bw <= 4096) {
 210                         /* Go with row buffer */
 211                         sw = bw;
 212                         sh = 65536 / bw;
 213                 } else if (bh <= 4096) {
 214                         /* Go with column buffer */
 215                         sw = 65536 / bh;
 216                         sh = bh;
 217                 } else {
 218                         sw = 256;
 219                         sh = 256;
 220                 }
 221         } else { // paths only, so 1M works faster
 222                 /* 1M is the cached buffer and we need 4 channels */
 223                 if (bw * bh < 262144) { // 1M/4
 224                         /* We can go with single buffer */
 225                         sw = bw;
 226                         sh = bh;
 227                 } else if (bw <= 8192) {
 228                         /* Go with row buffer */
 229                         sw = bw;
 230                         sh = 262144 / bw;
 231                 } else if (bh <= 8192) {
 232                         /* Go with column buffer */
 233                         sw = 262144 / bh;
 234                         sh = bh;
 235                 } else {
 236                         sw = 512;
 237                         sh = 512;
 238                 }
 239         }
 240
 241 /* fixme: RGB transformed bitmap blit is not implemented (Lauris) */
 242 /* And even if it would be, unless it uses MMX there is little reason to go RGB */
 243 // CAIRO FIXME: undefine this so that arena renders directly into SPCanvasBuf, without blitting and squishing (32bpp -> 24bpp packed) from a pixblock
 244 #define STRICT_RGBA
 245
 246         for (y = buf->rect.y0; y < buf->rect.y1; y += sh) {
 247                 for (x = buf->rect.x0; x < buf->rect.x1; x += sw) {
 248                         NRRectL area;
 249 #ifdef STRICT_RGBA
 250                         NRPixBlock pb;
 251 #endif
 252                         NRPixBlock cb;
 253
 254                         area.x0 = x;
 255                         area.y0 = y;
 256                         area.x1 = MIN (x + sw, buf->rect.x1);
 257                         area.y1 = MIN (y + sh, buf->rect.y1);
 258
 259 #ifdef STRICT_RGBA
 260                         nr_pixblock_setup_fast (&pb, NR_PIXBLOCK_MODE_R8G8B8A8P, area.x0, area.y0, area.x1, area.y1, TRUE);
 261                         /* fixme: */
 262                         pb.empty = FALSE;
 263 #endif
 264
 265 // CAIRO FIXME: switch this to R8G8B8A8P and 4 * ...
 266                         nr_pixblock_setup_extern (&cb, NR_PIXBLOCK_MODE_R8G8B8, area.x0, area.y0, area.x1, area.y1,
 267                                                   buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + 3 * (x - buf->rect.x0),
 268                                                   buf->buf_rowstride,
 269                                                   FALSE, FALSE);
 270
 271 #ifdef STRICT_RGBA
 272             pb.visible_area = buf->visible_rect;
 273                         if (pb.data.px != NULL) {
 274                             nr_arena_item_invoke_render (arena->root, &area, &pb, 0);
 275                             nr_blit_pixblock_pixblock (&cb, &pb);
 276                         }
 277                         nr_pixblock_release (&pb);
 278 #else
 279             cb.visible_area = buf->visible_rect;
 280                         nr_arena_item_invoke_render (arena->root, &area, &cb, 0);
 281 #endif
 282
 283                         nr_pixblock_release (&cb);
 284                 }
 285         }
 286 }
 287
 288 static double
 289 sp_canvas_arena_point (SPCanvasItem *item, NR::Point p, SPCanvasItem **actual_item)
 290 {
 291         SPCanvasArena *arena = SP_CANVAS_ARENA (item);
 292
 293         nr_arena_item_invoke_update (arena->root, NULL, &arena->gc,
 294                                      NR_ARENA_ITEM_STATE_BBOX | NR_ARENA_ITEM_STATE_PICK,
 295                                      NR_ARENA_ITEM_STATE_NONE);
 296
 297         NRArenaItem *picked = nr_arena_item_invoke_pick (arena->root, p, arena->arena->delta, arena->sticky);
 298
 299         arena->picked = picked;
 300
 301         if (picked) {
 302                 *actual_item = item;
 303                 return 0.0;
 304         }
 305
 306         return 1e18;
 307 }
 308
 309 static gint
 310 sp_canvas_arena_event (SPCanvasItem *item, GdkEvent *event)
 311 {
 312         NRArenaItem *new_arena;
 313         /* fixme: This sucks, we have to handle enter/leave notifiers */
 314
 315         SPCanvasArena *arena = SP_CANVAS_ARENA (item);
 316
 317         gint ret = FALSE;
 318
 319         switch (event->type) {
 320         case GDK_ENTER_NOTIFY:
 321                 if (!arena->cursor) {
 322                         if (arena->active) {
 323                                 //g_warning ("Cursor entered to arena with already active item");
 324                                 nr_object_unref ((NRObject *) arena->active);
 325                         }
 326                         arena->cursor = TRUE;
 327
 328                         /* TODO ... event -> arena transform? */
 329                         arena->c = NR::Point(event->crossing.x, event->crossing.y);
 330
 331                         /* fixme: Not sure abut this, but seems the right thing (Lauris) */
 332                         nr_arena_item_invoke_update (arena->root, NULL, &arena->gc, NR_ARENA_ITEM_STATE_PICK, NR_ARENA_ITEM_STATE_NONE);
 333                         arena->active = nr_arena_item_invoke_pick (arena->root, arena->c, arena->arena->delta, arena->sticky);
 334                         if (arena->active) nr_object_ref ((NRObject *) arena->active);
 335                         ret = sp_canvas_arena_send_event (arena, event);
 336                 }
 337                 break;
 338         case GDK_LEAVE_NOTIFY:
 339                 if (arena->cursor) {
 340                         ret = sp_canvas_arena_send_event (arena, event);
 341                         if (arena->active) nr_object_unref ((NRObject *) arena->active);
 342                         arena->active = NULL;
 343                         arena->cursor = FALSE;
 344                 }
 345                 break;
 346         case GDK_MOTION_NOTIFY:
 347                 /* TODO ... event -> arena transform? */
 348                 arena->c = NR::Point(event->motion.x, event->motion.y);
 349
 350                 /* fixme: Not sure abut this, but seems the right thing (Lauris) */
 351                 nr_arena_item_invoke_update (arena->root, NULL, &arena->gc, NR_ARENA_ITEM_STATE_PICK, NR_ARENA_ITEM_STATE_NONE);
 352                 new_arena = nr_arena_item_invoke_pick (arena->root, arena->c, arena->arena->delta, arena->sticky);
 353                 if (new_arena != arena->active) {
 354                         GdkEventCrossing ec;
 355                         ec.window = event->motion.window;
 356                         ec.send_event = event->motion.send_event;
 357                         ec.subwindow = event->motion.window;
 358                         ec.time = event->motion.time;
 359                         ec.x = event->motion.x;
 360                         ec.y = event->motion.y;
 361                         /* fixme: */
 362                         if (arena->active) {
 363                                 ec.type = GDK_LEAVE_NOTIFY;
 364                                 ret = sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);
 365                         }
 366                         if (arena->active) nr_object_unref ((NRObject *) arena->active);
 367                         arena->active = new_arena;
 368                         if (arena->active) nr_object_ref ((NRObject *) arena->active);
 369                         if (arena->active) {
 370                                 ec.type = GDK_ENTER_NOTIFY;
 371                                 ret = sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);
 372                         }
 373                 }
 374                 ret = sp_canvas_arena_send_event (arena, event);
 375                 break;
 376         default:
 377                 /* Just send event */
 378                 ret = sp_canvas_arena_send_event (arena, event);
 379                 break;
 380         }
 381
 382         return ret;
 383 }
 384
 385 static gint
 386 sp_canvas_arena_send_event (SPCanvasArena *arena, GdkEvent *event)
 387 {
 388         gint ret = FALSE;
 389
 390         /* Send event to arena */
 391         gtk_signal_emit (GTK_OBJECT (arena), signals[ARENA_EVENT], arena->active, event, &ret);
 392
 393         return ret;
 394 }
 395
 396 static void
 397 sp_canvas_arena_request_update (NRArena *arena, NRArenaItem *item, void *data)
 398 {
 399         sp_canvas_item_request_update (SP_CANVAS_ITEM (data));
 400 }
 401
 402 static void
 403 sp_canvas_arena_request_render (NRArena *arena, NRRectL *area, void *data)
 404 {
 405         sp_canvas_request_redraw (SP_CANVAS_ITEM (data)->canvas, area->x0, area->y0, area->x1, area->y1);
 406 }
 407
 408 void
 409 sp_canvas_arena_set_pick_delta (SPCanvasArena *ca, gdouble delta)
 410 {
 411         g_return_if_fail (ca != NULL);
 412         g_return_if_fail (SP_IS_CANVAS_ARENA (ca));
 413
 414         /* fixme: repick? */
 415         ca->delta = delta;
 416 }
 417
 418 void
 419 sp_canvas_arena_set_sticky (SPCanvasArena *ca, gboolean sticky)
 420 {
 421         g_return_if_fail (ca != NULL);
 422         g_return_if_fail (SP_IS_CANVAS_ARENA (ca));
 423
 424         /* fixme: repick? */
 425         ca->sticky = sticky;
 426 }
 427
 428 void
 429 sp_canvas_arena_render_pixblock (SPCanvasArena *ca, NRPixBlock *pb)
 430 {
 431         NRRectL area;
 432
 433         g_return_if_fail (ca != NULL);
 434         g_return_if_fail (SP_IS_CANVAS_ARENA (ca));
 435
 436         /* fixme: */
 437         pb->empty = FALSE;
 438
 439         area.x0 = pb->area.x0;
 440         area.y0 = pb->area.y0;
 441         area.x1 = pb->area.x1;
 442         area.y1 = pb->area.y1;
 443
 444         nr_arena_item_invoke_render (ca->root, &area, pb, 0);
 445 }
 446