1 #ifndef __NR_ARENA_ITEM_H__
2 #define __NR_ARENA_ITEM_H__
4 /*
5 * RGBA display list system for inkscape
6 *
7 * Author:
8 * Lauris Kaplinski <lauris@kaplinski.com>
9 *
10 * Copyright (C) 2001-2002 Lauris Kaplinski
11 * Copyright (C) 2001 Ximian, Inc.
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #define NR_TYPE_ARENA_ITEM (nr_arena_item_get_type ())
17 #define NR_ARENA_ITEM(o) (NR_CHECK_INSTANCE_CAST ((o), NR_TYPE_ARENA_ITEM, NRArenaItem))
18 #define NR_IS_ARENA_ITEM(o) (NR_CHECK_INSTANCE_TYPE ((o), NR_TYPE_ARENA_ITEM))
20 #define NR_ARENA_ITEM_VIRTUAL(i,m) (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (i))->m)
22 /*
23 * NRArenaItem state flags
24 */
26 /*
27 * NR_ARENA_ITEM_STATE_INVALID
28 *
29 * If set or retuned indicates, that given object is in error.
30 * Calling method has to return immediately, with appropriate
31 * error flag.
32 */
34 #define NR_ARENA_ITEM_STATE_INVALID (1 << 0)
37 #define NR_ARENA_ITEM_STATE_BBOX (1 << 1)
38 #define NR_ARENA_ITEM_STATE_COVERAGE (1 << 2)
39 #define NR_ARENA_ITEM_STATE_DRAFT (1 << 3)
40 #define NR_ARENA_ITEM_STATE_RENDER (1 << 4)
41 #define NR_ARENA_ITEM_STATE_CLIP (1 << 5)
42 #define NR_ARENA_ITEM_STATE_MASK (1 << 6)
43 #define NR_ARENA_ITEM_STATE_PICK (1 << 7)
44 #define NR_ARENA_ITEM_STATE_IMAGE (1 << 8)
46 #define NR_ARENA_ITEM_STATE_NONE 0x0000
47 #define NR_ARENA_ITEM_STATE_ALL 0x01fe
49 #define NR_ARENA_ITEM_STATE(i,s) (NR_ARENA_ITEM (i)->state & (s))
50 #define NR_ARENA_ITEM_SET_STATE(i,s) (NR_ARENA_ITEM (i)->state |= (s))
51 #define NR_ARENA_ITEM_UNSET_STATE(i,s) (NR_ARENA_ITEM (i)->state &= ~(s))
53 #define NR_ARENA_ITEM_RENDER_NO_CACHE (1 << 0)
55 #include <libnr/nr-matrix.h>
56 #include <libnr/nr-rect-l.h>
57 #include <libnr/nr-pixblock.h>
58 #include <libnr/nr-object.h>
59 #include "gc-soft-ptr.h"
60 #include "nr-arena-forward.h"
61 #include "display/nr-filter.h"
63 struct NRGC {
64 NRGC(NRGC const *p) : parent(p) {}
65 NRGC const *parent;
66 NRMatrix transform;
67 };
69 struct NRArenaItem : public NRObject {
71 NRArena *arena;
72 Inkscape::GC::soft_ptr<NRArenaItem> parent;
73 NRArenaItem *next;
74 Inkscape::GC::soft_ptr<NRArenaItem> prev;
76 /* Item state */
77 unsigned int state : 16;
78 unsigned int propagate : 1;
79 unsigned int sensitive : 1;
80 unsigned int visible : 1;
81 /* Whether items renders opacity itself */
82 unsigned int render_opacity : 1;
83 /* Opacity itself */
84 unsigned int opacity : 8;
86 /* Key for secondary rendering */
87 unsigned int key;
89 /* BBox in grid coordinates */
90 NRRectL bbox;
91 /* Our affine */
92 NRMatrix *transform;
93 /* Clip item */
94 NRArenaItem *clip;
95 /* Mask item */
96 NRArenaItem *mask;
97 /* Filter to be applied after rendering this object, NULL if none */
98 NR::Filter *filter;
99 /* Rendered buffer */
100 unsigned char *px;
102 /* Single data member */
103 void *data;
105 /* Current Transformation Matrix */
106 NR::Matrix ctm;
108 /* These hold background buffer state for filter rendering */
109 NRPixBlock *background_pb;
110 bool background_new;
112 void init(NRArena *arena) {
113 this->arena = arena;
114 }
115 };
117 struct NRArenaItemClass : public NRObjectClass {
118 NRArenaItem * (* children) (NRArenaItem *item);
119 NRArenaItem * (* last_child) (NRArenaItem *item);
120 void (* add_child) (NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref);
121 void (* remove_child) (NRArenaItem *item, NRArenaItem *child);
122 void (* set_child_position) (NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref);
124 unsigned int (* update) (NRArenaItem *item, NRRectL *area, NRGC *gc, unsigned int state, unsigned int reset);
125 unsigned int (* render) (NRArenaItem *item, NRRectL *area, NRPixBlock *pb, unsigned int flags);
126 unsigned int (* clip) (NRArenaItem *item, NRRectL *area, NRPixBlock *pb);
127 NRArenaItem * (* pick) (NRArenaItem *item, NR::Point p, double delta, unsigned int sticky);
128 };
130 #define NR_ARENA_ITEM_ARENA(ai) (((NRArenaItem *) (ai))->arena)
132 NRType nr_arena_item_get_type (void);
134 NRArenaItem *nr_arena_item_ref (NRArenaItem *item);
135 NRArenaItem *nr_arena_item_unref (NRArenaItem *item);
137 NRArenaItem *nr_arena_item_children (NRArenaItem *item);
138 NRArenaItem *nr_arena_item_last_child (NRArenaItem *item);
139 void nr_arena_item_add_child (NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref);
140 void nr_arena_item_remove_child (NRArenaItem *item, NRArenaItem *child);
141 void nr_arena_item_set_child_position (NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref);
143 /*
144 * Invoke update to given state, if item is inside area
145 *
146 * area == NULL is infinite
147 * gc is PARENT gc for invoke, CHILD gc in corresponding virtual method
148 * state - requested to state (bitwise or of requested flags)
149 * reset - reset to state (bitwise or of flags to reset)
150 */
152 unsigned int nr_arena_item_invoke_update (NRArenaItem *item, NRRectL *area, NRGC *gc, unsigned int state, unsigned int reset);
154 unsigned int nr_arena_item_invoke_render(NRArenaItem *item, NRRectL const *area, NRPixBlock *pb, unsigned int flags);
156 unsigned int nr_arena_item_invoke_clip (NRArenaItem *item, NRRectL *area, NRPixBlock *pb);
157 NRArenaItem *nr_arena_item_invoke_pick (NRArenaItem *item, NR::Point p, double delta, unsigned int sticky);
159 void nr_arena_item_request_update (NRArenaItem *item, unsigned int reset, unsigned int propagate);
160 void nr_arena_item_request_render (NRArenaItem *item);
162 /* Public */
164 NRArenaItem *nr_arena_item_unparent (NRArenaItem *item);
166 void nr_arena_item_append_child (NRArenaItem *parent, NRArenaItem *child);
168 void nr_arena_item_set_transform(NRArenaItem *item, NR::Matrix const &transform);
169 void nr_arena_item_set_transform(NRArenaItem *item, NRMatrix const *transform);
170 void nr_arena_item_set_opacity (NRArenaItem *item, double opacity);
171 void nr_arena_item_set_sensitive (NRArenaItem *item, unsigned int sensitive);
172 void nr_arena_item_set_visible (NRArenaItem *item, unsigned int visible);
173 void nr_arena_item_set_clip (NRArenaItem *item, NRArenaItem *clip);
174 void nr_arena_item_set_mask (NRArenaItem *item, NRArenaItem *mask);
175 void nr_arena_item_set_order (NRArenaItem *item, int order);
177 NRPixBlock *nr_arena_item_get_background (NRArenaItem const *item, int depth = 0);
179 /* Helpers */
181 NRArenaItem *nr_arena_item_attach (NRArenaItem *parent, NRArenaItem *child, NRArenaItem *prev, NRArenaItem *next);
182 NRArenaItem *nr_arena_item_detach (NRArenaItem *parent, NRArenaItem *child);
184 #define NR_ARENA_ITEM_SET_DATA(i,v) (((NRArenaItem *) (i))->data = (v))
185 #define NR_ARENA_ITEM_GET_DATA(i) (((NRArenaItem *) (i))->data)
187 #define NR_ARENA_ITEM_SET_KEY(i,k) (((NRArenaItem *) (i))->key = (k))
188 #define NR_ARENA_ITEM_GET_KEY(i) (((NRArenaItem *) (i))->key)
190 #endif