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Sourcecode: inkscape version File versions  Download package

canvas-arena.cpp

#define __SP_CANVAS_ARENA_C__

/*
 * RGBA display list system for inkscape
 *
 * Author:
 *   Lauris Kaplinski <lauris@kaplinski.com>
 *
 * Copyright (C) 2001-2002 Lauris Kaplinski
 * Copyright (C) 2001 Ximian, Inc.
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */

#include <string.h>
#include <libnr/nr-blit.h>
#include <gtk/gtksignal.h>

#include <display/sp-canvas.h>
#include <display/sp-canvas-util.h>
#include <helper/sp-marshal.h>
#include <display/nr-arena.h>
#include <display/nr-arena-group.h>
#include <display/canvas-arena.h>
#include <prefs-utils.h>

enum {
      ARENA_EVENT,
      LAST_SIGNAL
};

gdouble nr_arena_global_delta;

static void sp_canvas_arena_class_init(SPCanvasArenaClass *klass);
static void sp_canvas_arena_init(SPCanvasArena *group);
static void sp_canvas_arena_destroy(GtkObject *object);

static void sp_canvas_arena_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags);
static void sp_canvas_arena_render (SPCanvasItem *item, SPCanvasBuf *buf);
static double sp_canvas_arena_point (SPCanvasItem *item, NR::Point p, SPCanvasItem **actual_item);
static gint sp_canvas_arena_event (SPCanvasItem *item, GdkEvent *event);

static gint sp_canvas_arena_send_event (SPCanvasArena *arena, GdkEvent *event);

static void sp_canvas_arena_request_update (NRArena *arena, NRArenaItem *item, void *data);
static void sp_canvas_arena_request_render (NRArena *arena, NRRectL *area, void *data);

NRArenaEventVector carenaev = {
      {NULL},
      sp_canvas_arena_request_update,
      sp_canvas_arena_request_render
};

static SPCanvasItemClass *parent_class;
static guint signals[LAST_SIGNAL] = {0};

GtkType
sp_canvas_arena_get_type (void)
{
      static GtkType type = 0;
      if (!type) {
            GtkTypeInfo info = {
                  "SPCanvasArena",
                  sizeof (SPCanvasArena),
                  sizeof (SPCanvasArenaClass),
                  (GtkClassInitFunc) sp_canvas_arena_class_init,
                  (GtkObjectInitFunc) sp_canvas_arena_init,
                  NULL, NULL, NULL
            };
            type = gtk_type_unique (SP_TYPE_CANVAS_ITEM, &info);
      }
      return type;
}

static void
sp_canvas_arena_class_init (SPCanvasArenaClass *klass)
{
      GtkObjectClass *object_class;
      SPCanvasItemClass *item_class;

      nr_arena_global_delta = prefs_get_double_attribute ("options.cursortolerance", "value", 1.0); // default is 1 px

      object_class = (GtkObjectClass *) klass;
      item_class = (SPCanvasItemClass *) klass;

      parent_class = (SPCanvasItemClass*)gtk_type_class (SP_TYPE_CANVAS_ITEM);

      signals[ARENA_EVENT] = gtk_signal_new ("arena_event",
                                     GTK_RUN_LAST,
                                     GTK_CLASS_TYPE(object_class),
                                     GTK_SIGNAL_OFFSET (SPCanvasArenaClass, arena_event),
                                     sp_marshal_INT__POINTER_POINTER,
                                     GTK_TYPE_INT, 2, GTK_TYPE_POINTER, GTK_TYPE_POINTER);

      object_class->destroy = sp_canvas_arena_destroy;

      item_class->update = sp_canvas_arena_update;
      item_class->render = sp_canvas_arena_render;
      item_class->point = sp_canvas_arena_point;
      item_class->event = sp_canvas_arena_event;
}

static void
sp_canvas_arena_init (SPCanvasArena *arena)
{
      arena->sticky = FALSE;

      arena->arena = NRArena::create();
      arena->root = NRArenaGroup::create(arena->arena);
      nr_arena_group_set_transparent (NR_ARENA_GROUP (arena->root), TRUE);

#ifdef arena_item_tile_cache
  arena->root->skipCaching=true;
#endif
  
      arena->active = NULL;

      nr_active_object_add_listener ((NRActiveObject *) arena->arena, (NRObjectEventVector *) &carenaev, sizeof (carenaev), arena);
}

static void
sp_canvas_arena_destroy (GtkObject *object)
{
      SPCanvasArena *arena = SP_CANVAS_ARENA (object);

      if (arena->active) {
            nr_object_unref ((NRObject *) arena->active);
            arena->active = NULL;
      }

      if (arena->root) {
            nr_arena_item_unref (arena->root);
            arena->root = NULL;
      }

      if (arena->arena) {
            nr_active_object_remove_listener_by_data ((NRActiveObject *) arena->arena, arena);

            nr_object_unref ((NRObject *) arena->arena);
            arena->arena = NULL;
      }

      if (GTK_OBJECT_CLASS (parent_class)->destroy)
            (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}

static void
sp_canvas_arena_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags)
{
      SPCanvasArena *arena = SP_CANVAS_ARENA (item);

      if (((SPCanvasItemClass *) parent_class)->update)
            (* ((SPCanvasItemClass *) parent_class)->update) (item, affine, flags);

      arena->gc.transform = affine;

      guint reset;
      reset = (flags & SP_CANVAS_UPDATE_AFFINE)? NR_ARENA_ITEM_STATE_ALL : NR_ARENA_ITEM_STATE_NONE;

      nr_arena_item_invoke_update (arena->root, NULL, &arena->gc, NR_ARENA_ITEM_STATE_ALL, reset);

      item->x1 = arena->root->bbox.x0 - 1;
      item->y1 = arena->root->bbox.y0 - 1;
      item->x2 = arena->root->bbox.x1 + 1;
      item->y2 = arena->root->bbox.y1 + 1;

      if (arena->cursor) {
            /* Mess with enter/leave notifiers */
            NRArenaItem *new_arena = nr_arena_item_invoke_pick (arena->root, arena->c, nr_arena_global_delta, arena->sticky);
            if (new_arena != arena->active) {
                  GdkEventCrossing ec;
                  ec.window = GTK_WIDGET (item->canvas)->window;
                  ec.send_event = TRUE;
                  ec.subwindow = ec.window;
                  ec.time = GDK_CURRENT_TIME;
                  ec.x = arena->c[NR::X];
                  ec.y = arena->c[NR::Y];
                  /* fixme: */
                  if (arena->active) {
                        ec.type = GDK_LEAVE_NOTIFY;
                        sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);
                  }
                  /* fixme: This is not optimal - better track ::destroy (Lauris) */
                  if (arena->active) nr_object_unref ((NRObject *) arena->active);
                  arena->active = new_arena;
                  if (arena->active) nr_object_ref ((NRObject *) arena->active);
                  if (arena->active) {
                        ec.type = GDK_ENTER_NOTIFY;
                        sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);
                  }
            }
      }
}

#ifdef arena_item_tile_cache
extern void age_cache(void);
#endif

static void
sp_canvas_arena_render (SPCanvasItem *item, SPCanvasBuf *buf)
{
      gint bw, bh, sw, sh;
      gint x, y;

      SPCanvasArena *arena = SP_CANVAS_ARENA (item);

      nr_arena_item_invoke_update (arena->root, NULL, &arena->gc,
                             NR_ARENA_ITEM_STATE_BBOX | NR_ARENA_ITEM_STATE_RENDER,
                             NR_ARENA_ITEM_STATE_NONE);

      if (buf->is_bg) {
            sp_canvas_clear_buffer (buf);
            buf->is_bg = FALSE;
            buf->is_buf = TRUE;
      }
  
#ifdef arena_item_tile_cache
  age_cache();
#endif
      bw = buf->rect.x1 - buf->rect.x0;
      bh = buf->rect.y1 - buf->rect.y0;
      if ((bw < 1) || (bh < 1)) return;

      /* 65536 is max cached buffer and we need 4 channels */
      if (bw * bh < 16384) {
            /* We can go with single buffer */
            sw = bw;
            sh = bh;
      } else if (bw <= 2048) {
            /* Go with row buffer */
            sw = bw;
            sh = 16384 / bw;
      } else if (bh <= 2048) {
            /* Go with column buffer */
            sw = 16384 / bh;
            sh = bh;
      } else {
            sw = 128;
            sh = 128;
      }

/* fixme: RGB transformed bitmap blit is not implemented (Lauris) */
/* And even if it would be, unless it uses MMX there is little reason to go RGB */
#define STRICT_RGBA

      for (y = buf->rect.y0; y < buf->rect.y1; y += sh) {
            for (x = buf->rect.x0; x < buf->rect.x1; x += sw) {
                  NRRectL area;
#ifdef STRICT_RGBA
                  NRPixBlock pb;
#endif
                  NRPixBlock cb;

                  area.x0 = x;
                  area.y0 = y;
                  area.x1 = MIN (x + sw, buf->rect.x1);
                  area.y1 = MIN (y + sh, buf->rect.y1);

#ifdef STRICT_RGBA
                  nr_pixblock_setup_fast (&pb, NR_PIXBLOCK_MODE_R8G8B8A8P, area.x0, area.y0, area.x1, area.y1, TRUE);
                  /* fixme: */
                  pb.empty = FALSE;
#endif

                  nr_pixblock_setup_extern (&cb, NR_PIXBLOCK_MODE_R8G8B8, area.x0, area.y0, area.x1, area.y1,
                                      buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + 3 * (x - buf->rect.x0),
                                      buf->buf_rowstride,
                                      FALSE, FALSE);

#ifdef STRICT_RGBA
                  nr_arena_item_invoke_render (arena->root, &area, &pb, 0);
                  nr_blit_pixblock_pixblock (&cb, &pb);
                  nr_pixblock_release (&pb);
#else
                  nr_arena_item_invoke_render (arena->root, &area, &cb, 0);
#endif

                  nr_pixblock_release (&cb);
            }
      }
}

static double
sp_canvas_arena_point (SPCanvasItem *item, NR::Point p, SPCanvasItem **actual_item)
{
      SPCanvasArena *arena = SP_CANVAS_ARENA (item);

      nr_arena_item_invoke_update (arena->root, NULL, &arena->gc,
                             NR_ARENA_ITEM_STATE_BBOX | NR_ARENA_ITEM_STATE_PICK,
                             NR_ARENA_ITEM_STATE_NONE);

      NRArenaItem *picked = nr_arena_item_invoke_pick (arena->root, p, nr_arena_global_delta, arena->sticky);

      arena->picked = picked;

      if (picked) {
            *actual_item = item;
            return 0.0;
      }

      return 1e18;
}

static gint
sp_canvas_arena_event (SPCanvasItem *item, GdkEvent *event)
{
      NRArenaItem *new_arena;
      /* fixme: This sucks, we have to handle enter/leave notifiers */

      SPCanvasArena *arena = SP_CANVAS_ARENA (item);

      gint ret = FALSE;

      switch (event->type) {
      case GDK_ENTER_NOTIFY:
            if (!arena->cursor) {
                  if (arena->active) {
                        //g_warning ("Cursor entered to arena with already active item");
                        nr_object_unref ((NRObject *) arena->active);
                  }
                  arena->cursor = TRUE;

                  /* TODO ... event -> arena transform? */
                  arena->c = NR::Point(event->crossing.x, event->crossing.y);

                  /* fixme: Not sure abut this, but seems the right thing (Lauris) */
                  nr_arena_item_invoke_update (arena->root, NULL, &arena->gc, NR_ARENA_ITEM_STATE_PICK, NR_ARENA_ITEM_STATE_NONE);
                  arena->active = nr_arena_item_invoke_pick (arena->root, arena->c, nr_arena_global_delta, arena->sticky);
                  if (arena->active) nr_object_ref ((NRObject *) arena->active);
                  ret = sp_canvas_arena_send_event (arena, event);
            }
            break;
      case GDK_LEAVE_NOTIFY:
            if (arena->cursor) {
                  ret = sp_canvas_arena_send_event (arena, event);
                  if (arena->active) nr_object_unref ((NRObject *) arena->active);
                  arena->active = NULL;
                  arena->cursor = FALSE;
            }
            break;
      case GDK_MOTION_NOTIFY:
            /* TODO ... event -> arena transform? */
            arena->c = NR::Point(event->motion.x, event->motion.y);

            /* fixme: Not sure abut this, but seems the right thing (Lauris) */
            nr_arena_item_invoke_update (arena->root, NULL, &arena->gc, NR_ARENA_ITEM_STATE_PICK, NR_ARENA_ITEM_STATE_NONE);
            new_arena = nr_arena_item_invoke_pick (arena->root, arena->c, nr_arena_global_delta, arena->sticky);
            if (new_arena != arena->active) {
                  GdkEventCrossing ec;
                  ec.window = event->motion.window;
                  ec.send_event = event->motion.send_event;
                  ec.subwindow = event->motion.window;
                  ec.time = event->motion.time;
                  ec.x = event->motion.x;
                  ec.y = event->motion.y;
                  /* fixme: */
                  if (arena->active) {
                        ec.type = GDK_LEAVE_NOTIFY;
                        ret = sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);
                  }
                  if (arena->active) nr_object_unref ((NRObject *) arena->active);
                  arena->active = new_arena;
                  if (arena->active) nr_object_ref ((NRObject *) arena->active);
                  if (arena->active) {
                        ec.type = GDK_ENTER_NOTIFY;
                        ret = sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);
                  }
            }
            ret = sp_canvas_arena_send_event (arena, event);
            break;
      default:
            /* Just send event */
            ret = sp_canvas_arena_send_event (arena, event);
            break;
      }

      return ret;
}

static gint
sp_canvas_arena_send_event (SPCanvasArena *arena, GdkEvent *event)
{
      gint ret = FALSE;

      /* Send event to arena */
      gtk_signal_emit (GTK_OBJECT (arena), signals[ARENA_EVENT], arena->active, event, &ret);

      return ret;
}

static void
sp_canvas_arena_request_update (NRArena *arena, NRArenaItem *item, void *data)
{
      sp_canvas_item_request_update (SP_CANVAS_ITEM (data));
}

static void
sp_canvas_arena_request_render (NRArena *arena, NRRectL *area, void *data)
{
      sp_canvas_request_redraw (SP_CANVAS_ITEM (data)->canvas, area->x0, area->y0, area->x1, area->y1);
}

void
sp_canvas_arena_set_pick_delta (SPCanvasArena *ca, gdouble delta)
{
      g_return_if_fail (ca != NULL);
      g_return_if_fail (SP_IS_CANVAS_ARENA (ca));

      /* fixme: repick? */
      ca->delta = delta;
}

void
sp_canvas_arena_set_sticky (SPCanvasArena *ca, gboolean sticky)
{
      g_return_if_fail (ca != NULL);
      g_return_if_fail (SP_IS_CANVAS_ARENA (ca));

      /* fixme: repick? */
      ca->sticky = sticky;
}

void
sp_canvas_arena_render_pixblock (SPCanvasArena *ca, NRPixBlock *pb)
{
      NRRectL area;

      g_return_if_fail (ca != NULL);
      g_return_if_fail (SP_IS_CANVAS_ARENA (ca));

      /* fixme: */
      pb->empty = FALSE;

      area.x0 = pb->area.x0;
      area.y0 = pb->area.y0;
      area.x1 = pb->area.x1;
      area.y1 = pb->area.y1;

      nr_arena_item_invoke_render (ca->root, &area, pb, 0);
}


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