nr-arena-item.cpp revision 724821145d62dee9f97465c706952582da6e432d
#define __NR_ARENA_ITEM_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
*/
#define noNR_ARENA_ITEM_VERBOSE
#define noNR_ARENA_ITEM_DEBUG_CASCADE
#include <libnr/nr-blit.h>
#include <libnr/nr-pixops.h>
#include "nr-arena.h"
#include "nr-arena-item.h"
#include "gc-core.h"
#include "nr-filter.h"
#include "libnr/nr-rect.h"
#include "nr-arena-group.h"
#include "prefs-utils.h"
namespace GC = Inkscape::GC;
static void nr_arena_item_class_init (NRArenaItemClass *klass);
static void nr_arena_item_init (NRArenaItem *item);
static void nr_arena_item_private_finalize (NRObject *object);
static NRObjectClass *parent_class;
NRType
nr_arena_item_get_type (void)
{
static NRType type = 0;
if (!type) {
type = nr_object_register_type (NR_TYPE_OBJECT,
"NRArenaItem",
sizeof (NRArenaItemClass),
sizeof (NRArenaItem),
(void (*)(NRObjectClass *))
nr_arena_item_class_init,
(void (*)(NRObject *))
nr_arena_item_init);
}
return type;
}
static void
nr_arena_item_class_init (NRArenaItemClass *klass)
{
NRObjectClass *object_class;
object_class = (NRObjectClass *) klass;
parent_class = ((NRObjectClass *) klass)->parent;
object_class->finalize = nr_arena_item_private_finalize;
object_class->cpp_ctor = NRObject::invoke_ctor < NRArenaItem >;
}
static void
nr_arena_item_init (NRArenaItem *item)
{
item->arena = NULL;
item->parent = NULL;
item->next = item->prev = NULL;
item->key = 0;
item->state = 0;
item->sensitive = TRUE;
item->visible = TRUE;
memset (&item->bbox, 0, sizeof (item->bbox));
item->transform = NULL;
item->opacity = 255;
item->render_opacity = FALSE;
item->transform = NULL;
item->clip = NULL;
item->mask = NULL;
item->px = NULL;
item->data = NULL;
item->filter = NULL;
item->background_pb = NULL;
item->background_new = false;
}
static void
nr_arena_item_private_finalize (NRObject *object)
{
NRArenaItem *item = static_cast < NRArenaItem * >(object);
item->px = NULL;
item->transform = NULL;
((NRObjectClass *) (parent_class))->finalize (object);
}
NRArenaItem *
nr_arena_item_children (NRArenaItem *item)
{
nr_return_val_if_fail (item != NULL, NULL);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
if (NR_ARENA_ITEM_VIRTUAL (item, children))
return NR_ARENA_ITEM_VIRTUAL (item, children) (item);
return NULL;
}
NRArenaItem *
nr_arena_item_last_child (NRArenaItem *item)
{
nr_return_val_if_fail (item != NULL, NULL);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
if (NR_ARENA_ITEM_VIRTUAL (item, last_child)) {
return NR_ARENA_ITEM_VIRTUAL (item, last_child) (item);
} else {
NRArenaItem *ref = nr_arena_item_children (item);
if (ref)
while (ref->next)
ref = ref->next;
return ref;
}
}
void
nr_arena_item_add_child (NRArenaItem *item, NRArenaItem *child,
NRArenaItem *ref)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
nr_return_if_fail (child != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (child));
nr_return_if_fail (child->parent == NULL);
nr_return_if_fail (child->prev == NULL);
nr_return_if_fail (child->next == NULL);
nr_return_if_fail (child->arena == item->arena);
nr_return_if_fail (child != ref);
nr_return_if_fail (!ref || NR_IS_ARENA_ITEM (ref));
nr_return_if_fail (!ref || (ref->parent == item));
if (NR_ARENA_ITEM_VIRTUAL (item, add_child))
NR_ARENA_ITEM_VIRTUAL (item, add_child) (item, child, ref);
}
void
nr_arena_item_remove_child (NRArenaItem *item, NRArenaItem *child)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
nr_return_if_fail (child != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (child));
nr_return_if_fail (child->parent == item);
if (NR_ARENA_ITEM_VIRTUAL (item, remove_child))
NR_ARENA_ITEM_VIRTUAL (item, remove_child) (item, child);
}
void
nr_arena_item_set_child_position (NRArenaItem *item, NRArenaItem *child,
NRArenaItem *ref)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
nr_return_if_fail (child != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (child));
nr_return_if_fail (child->parent == item);
nr_return_if_fail (!ref || NR_IS_ARENA_ITEM (ref));
nr_return_if_fail (!ref || (ref->parent == item));
if (NR_ARENA_ITEM_VIRTUAL (item, set_child_position))
NR_ARENA_ITEM_VIRTUAL (item, set_child_position) (item, child, ref);
}
NRArenaItem *
nr_arena_item_ref (NRArenaItem *item)
{
nr_object_ref ((NRObject *) item);
return item;
}
NRArenaItem *
nr_arena_item_unref (NRArenaItem *item)
{
nr_object_unref ((NRObject *) item);
return NULL;
}
unsigned int
nr_arena_item_invoke_update (NRArenaItem *item, NRRectL *area, NRGC *gc,
unsigned int state, unsigned int reset)
{
NRGC childgc (gc);
nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
NR_ARENA_ITEM_STATE_INVALID);
nr_return_val_if_fail (!(state & NR_ARENA_ITEM_STATE_INVALID),
NR_ARENA_ITEM_STATE_INVALID);
#ifdef NR_ARENA_ITEM_DEBUG_CASCADE
printf ("Update %s:%p %x %x %x\n",
nr_type_name_from_instance ((GTypeInstance *) item), item, state,
item->state, reset);
#endif
/* return if in error */
if (item->state & NR_ARENA_ITEM_STATE_INVALID)
return item->state;
/* Set reset flags according to propagation status */
if (item->propagate) {
reset |= ~item->state;
item->propagate = FALSE;
}
/* Reset our state */
item->state &= ~reset;
/* Return if NOP */
if (!(~item->state & state))
return item->state;
/* Test whether to return immediately */
if (area && (item->state & NR_ARENA_ITEM_STATE_BBOX)) {
if (!nr_rect_l_test_intersect (area, &item->bbox))
return item->state;
}
/* Reset image cache, if not to be kept */
if (!(item->state & NR_ARENA_ITEM_STATE_IMAGE) && (item->px)) {
item->px = NULL;
}
/* Set up local gc */
childgc = *gc;
if (item->transform) {
nr_matrix_multiply (&childgc.transform, item->transform,
&childgc.transform);
}
/* Remember the transformation matrix */
item->ctm = childgc.transform;
/* Invoke the real method */
item->state =
NR_ARENA_ITEM_VIRTUAL (item, update) (item, area, &childgc, state,
reset);
if (item->state & NR_ARENA_ITEM_STATE_INVALID)
return item->state;
/* Enlarge the bounding box to contain filter effects */
if (item->filter) {
item->filter->bbox_enlarge (item->bbox);
}
// fixme: to fix the display glitches, in outline mode bbox must be a combination of
// full item bbox and its clip and mask (after we have the API to get these)
/* Clipping */
if (item->clip) {
// FIXME: since here we only need bbox, consider passing
// ((state & !(NR_ARENA_ITEM_STATE_RENDER)) | NR_ARENA_ITEM_STATE_BBOX)
// instead of state, so it does not have to create rendering structures in nr_arena_shape_update
unsigned int newstate = nr_arena_item_invoke_update (item->clip, area, &childgc, state, reset);
if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
item->state |= NR_ARENA_ITEM_STATE_INVALID;
return item->state;
}
nr_rect_l_intersect (&item->bbox, &item->bbox, &item->clip->bbox);
}
/* Masking */
if (item->mask) {
unsigned int newstate = nr_arena_item_invoke_update (item->mask, area, &childgc, state, reset);
if (newstate & NR_ARENA_ITEM_STATE_INVALID) {
item->state |= NR_ARENA_ITEM_STATE_INVALID;
return item->state;
}
nr_rect_l_intersect (&item->bbox, &item->bbox, &item->mask->bbox);
}
return item->state;
}
/**
* Render item to pixblock.
*
* \return Has NR_ARENA_ITEM_STATE_RENDER set on success.
*/
unsigned int
nr_arena_item_invoke_render (cairo_t *ct, NRArenaItem *item, NRRectL const *area,
NRPixBlock *pb, unsigned int flags)
{
bool outline = (item->arena->rendermode == RENDERMODE_OUTLINE);
nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
NR_ARENA_ITEM_STATE_INVALID);
nr_return_val_if_fail (item->state & NR_ARENA_ITEM_STATE_BBOX,
item->state);
#ifdef NR_ARENA_ITEM_VERBOSE
printf ("Invoke render %p: %d %d - %d %d\n", item, area->x0, area->y0,
area->x1, area->y1);
#endif
/* If we are outside bbox just return successfully */
if (!item->visible)
return item->state | NR_ARENA_ITEM_STATE_RENDER;
NRRectL carea;
nr_rect_l_intersect (&carea, area, &item->bbox);
if (nr_rect_l_test_empty (&carea))
return item->state | NR_ARENA_ITEM_STATE_RENDER;
if (item->filter && !outline) {
item->filter->area_enlarge (carea, item->ctm);
nr_rect_l_intersect (&carea, &carea, &item->bbox);
}
if (outline) {
// No caching in outline mode for now; investigate if it really gives any advantage with cairo.
// Also no attempts to clip anything; just render everything: item, clip, mask
// First, render the object itself
unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, pb, flags);
if (state & NR_ARENA_ITEM_STATE_INVALID) {
/* Clean up and return error */
item->state |= NR_ARENA_ITEM_STATE_INVALID;
return item->state;
}
// render clip and mask, if any
guint32 saved_rgba = item->arena->outlinecolor; // save current outline color
// render clippath as an object, using a different color
if (item->clip) {
item->arena->outlinecolor = prefs_get_int_attribute("options.wireframecolors", "clips", 0x00ff00ff); // green clips
NR_ARENA_ITEM_VIRTUAL (item->clip, render) (ct, item->clip, &carea, pb, flags);
}
// render mask as an object, using a different color
if (item->mask) {
item->arena->outlinecolor = prefs_get_int_attribute("options.wireframecolors", "masks", 0x0000ffff); // blue masks
NR_ARENA_ITEM_VIRTUAL (item->mask, render) (ct, item->mask, &carea, pb, flags);
}
item->arena->outlinecolor = saved_rgba; // restore outline color
return item->state | NR_ARENA_ITEM_STATE_RENDER;
}
NRPixBlock cpb;
if (item->px) {
/* Has cache pixblock, render this and return */
nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P,
/* fixme: This probably cannot overflow, because we render only if visible */
/* fixme: and pixel cache is there only for small items */
/* fixme: But this still needs extra check (Lauris) */
item->bbox.x0, item->bbox.y0,
item->bbox.x1, item->bbox.y1,
item->px,
4 * (item->bbox.x1 - item->bbox.x0), FALSE,
FALSE);
nr_blit_pixblock_pixblock (pb, &cpb);
nr_pixblock_release (&cpb);
pb->empty = FALSE;
return item->state | NR_ARENA_ITEM_STATE_RENDER;
}
NRPixBlock *dpb = pb;
/* Setup cache if we can */
if ((!(flags & NR_ARENA_ITEM_RENDER_NO_CACHE)) &&
(carea.x0 <= item->bbox.x0) && (carea.y0 <= item->bbox.y0) &&
(carea.x1 >= item->bbox.x1) && (carea.y1 >= item->bbox.y1) &&
(((item->bbox.x1 - item->bbox.x0) * (item->bbox.y1 -
item->bbox.y0)) <= 4096)) {
// Item bbox is fully in renderable area and size is acceptable
carea.x0 = item->bbox.x0;
carea.y0 = item->bbox.y0;
carea.x1 = item->bbox.x1;
carea.y1 = item->bbox.y1;
item->px =
new (GC::ATOMIC) unsigned char[4 * (carea.x1 - carea.x0) *
(carea.y1 - carea.y0)];
nr_pixblock_setup_extern (&cpb, NR_PIXBLOCK_MODE_R8G8B8A8P, carea.x0,
carea.y0, carea.x1, carea.y1, item->px,
4 * (carea.x1 - carea.x0), TRUE, TRUE);
cpb.visible_area = pb->visible_area;
dpb = &cpb;
// Set nocache flag for downstream rendering
flags |= NR_ARENA_ITEM_RENDER_NO_CACHE;
}
/* Determine, whether we need temporary buffer */
if (item->clip || item->mask
|| ((item->opacity != 255) && !item->render_opacity)
|| (item->filter) || item->background_new
|| (item->parent && item->parent->background_pb)) {
/* Setup and render item buffer */
NRPixBlock ipb;
nr_pixblock_setup_fast (&ipb, NR_PIXBLOCK_MODE_R8G8B8A8P,
carea.x0, carea.y0, carea.x1, carea.y1,
TRUE);
// if memory allocation failed, abort render
if (ipb.size != NR_PIXBLOCK_SIZE_TINY && ipb.data.px == NULL) {
nr_pixblock_release (&ipb);
return (item->state);
}
/* If background access is used, save the pixblock address.
* This address is set to NULL at the end of this block */
if (item->background_new
|| (item->parent && item->parent->background_pb)) {
item->background_pb = &ipb;
}
ipb.visible_area = pb->visible_area;
unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, &ipb, flags);
if (state & NR_ARENA_ITEM_STATE_INVALID) {
/* Clean up and return error */
nr_pixblock_release (&ipb);
if (dpb != pb)
nr_pixblock_release (dpb);
item->state |= NR_ARENA_ITEM_STATE_INVALID;
return item->state;
}
ipb.empty = FALSE;
/* Run filtering, if a filter is set for this object */
if (item->filter) {
item->filter->render (item, &ipb);
}
if (item->clip || item->mask) {
/* Setup mask pixblock */
NRPixBlock mpb;
nr_pixblock_setup_fast (&mpb, NR_PIXBLOCK_MODE_A8, carea.x0,
carea.y0, carea.x1, carea.y1, TRUE);
if (mpb.data.px != NULL) { // if memory allocation was successful
mpb.visible_area = pb->visible_area;
/* Do clip if needed */
if (item->clip) {
state = nr_arena_item_invoke_clip (item->clip, &carea, &mpb);
if (state & NR_ARENA_ITEM_STATE_INVALID) {
/* Clean up and return error */
nr_pixblock_release (&mpb);
nr_pixblock_release (&ipb);
if (dpb != pb)
nr_pixblock_release (dpb);
item->state |= NR_ARENA_ITEM_STATE_INVALID;
return item->state;
}
mpb.empty = FALSE;
}
/* Do mask if needed */
if (item->mask) {
NRPixBlock tpb;
/* Set up yet another temporary pixblock */
nr_pixblock_setup_fast (&tpb, NR_PIXBLOCK_MODE_R8G8B8A8N,
carea.x0, carea.y0, carea.x1,
carea.y1, TRUE);
if (tpb.data.px != NULL) { // if memory allocation was successful
tpb.visible_area = pb->visible_area;
unsigned int state = NR_ARENA_ITEM_VIRTUAL (item->mask, render) (ct, item->mask, &carea, &tpb, flags);
if (state & NR_ARENA_ITEM_STATE_INVALID) {
/* Clean up and return error */
nr_pixblock_release (&tpb);
nr_pixblock_release (&mpb);
nr_pixblock_release (&ipb);
if (dpb != pb)
nr_pixblock_release (dpb);
item->state |= NR_ARENA_ITEM_STATE_INVALID;
return item->state;
}
/* Composite with clip */
if (item->clip) {
int x, y;
for (y = carea.y0; y < carea.y1; y++) {
unsigned char *s, *d;
s = NR_PIXBLOCK_PX (&tpb) + (y -
carea.y0) * tpb.rs;
d = NR_PIXBLOCK_PX (&mpb) + (y -
carea.y0) * mpb.rs;
for (x = carea.x0; x < carea.x1; x++) {
unsigned int m;
m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
d[0] =
FAST_DIV_ROUND < 3 * 255 * 255 >
(NR_PREMUL_123 (d[0], m));
s += 4;
d += 1;
}
}
} else {
int x, y;
for (y = carea.y0; y < carea.y1; y++) {
unsigned char *s, *d;
s = NR_PIXBLOCK_PX (&tpb) + (y -
carea.y0) * tpb.rs;
d = NR_PIXBLOCK_PX (&mpb) + (y -
carea.y0) * mpb.rs;
for (x = carea.x0; x < carea.x1; x++) {
unsigned int m;
m = NR_PREMUL_112 (s[0] + s[1] + s[2], s[3]);
d[0] = FAST_DIV_ROUND < 3 * 255 > (m);
s += 4;
d += 1;
}
}
mpb.empty = FALSE;
}
}
nr_pixblock_release (&tpb);
}
/* Multiply with opacity if needed */
if ((item->opacity != 255) && !item->render_opacity
) {
int x, y;
unsigned int a;
a = item->opacity;
for (y = carea.y0; y < carea.y1; y++) {
unsigned char *d;
d = NR_PIXBLOCK_PX (&mpb) + (y - carea.y0) * mpb.rs;
for (x = carea.x0; x < carea.x1; x++) {
d[0] = NR_PREMUL_111 (d[0], a);
d += 1;
}
}
}
/* Compose rendering pixblock int destination */
nr_blit_pixblock_pixblock_mask (dpb, &ipb, &mpb);
}
nr_pixblock_release (&mpb);
/* This pointer wouldn't be valid outside this block, so clear it */
item->background_pb = NULL;
} else {
if (item->render_opacity) { // opacity was already rendered in, just copy to dpb here
nr_blit_pixblock_pixblock(dpb, &ipb);
} else { // copy while multiplying by opacity
nr_blit_pixblock_pixblock_alpha (dpb, &ipb, item->opacity);
}
}
nr_pixblock_release (&ipb);
dpb->empty = FALSE;
} else {
/* Just render */
unsigned int state = NR_ARENA_ITEM_VIRTUAL (item, render) (ct, item, &carea, dpb, flags);
if (state & NR_ARENA_ITEM_STATE_INVALID) {
/* Clean up and return error */
if (dpb != pb)
nr_pixblock_release (dpb);
item->state |= NR_ARENA_ITEM_STATE_INVALID;
return item->state;
}
dpb->empty = FALSE;
}
if (dpb != pb) {
/* Have to blit from cache */
nr_blit_pixblock_pixblock (pb, dpb);
nr_pixblock_release (dpb);
pb->empty = FALSE;
item->state |= NR_ARENA_ITEM_STATE_IMAGE;
}
return item->state | NR_ARENA_ITEM_STATE_RENDER;
}
unsigned int
nr_arena_item_invoke_clip (NRArenaItem *item, NRRectL *area, NRPixBlock *pb)
{
nr_return_val_if_fail (item != NULL, NR_ARENA_ITEM_STATE_INVALID);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (item),
NR_ARENA_ITEM_STATE_INVALID);
/* we originally short-circuited if the object state included
* NR_ARENA_ITEM_STATE_CLIP (and showed a warning on the console);
* anyone know why we stopped doing so?
*/
nr_return_val_if_fail ((pb->area.x1 - pb->area.x0) >=
(area->x1 - area->x0),
NR_ARENA_ITEM_STATE_INVALID);
nr_return_val_if_fail ((pb->area.y1 - pb->area.y0) >=
(area->y1 - area->y0),
NR_ARENA_ITEM_STATE_INVALID);
#ifdef NR_ARENA_ITEM_VERBOSE
printf ("Invoke clip by %p: %d %d - %d %d, item bbox %d %d - %d %d\n",
item, area->x0, area->y0, area->x1, area->y1, (&item->bbox)->x0,
(&item->bbox)->y0, (&item->bbox)->x1, (&item->bbox)->y1);
#endif
if (item->visible && nr_rect_l_test_intersect (area, &item->bbox)) {
/* Need render that item */
if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->clip) {
return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
clip (item, area, pb);
}
}
return item->state;
}
NRArenaItem *
nr_arena_item_invoke_pick (NRArenaItem *item, NR::Point p, double delta,
unsigned int sticky)
{
nr_return_val_if_fail (item != NULL, NULL);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
// Sometimes there's no BBOX in item->state, reason unknown (bug 992817); I made this not an assert to remove the warning
if (!(item->state & NR_ARENA_ITEM_STATE_BBOX)
|| !(item->state & NR_ARENA_ITEM_STATE_PICK))
return NULL;
if (!sticky && !(item->visible && item->sensitive))
return NULL;
// TODO: rewrite using NR::Rect
const double x = p[NR::X];
const double y = p[NR::Y];
if (((x + delta) >= item->bbox.x0) &&
((x - delta) < item->bbox.x1) &&
((y + delta) >= item->bbox.y0) && ((y - delta) < item->bbox.y1)) {
if (((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->pick)
return ((NRArenaItemClass *) NR_OBJECT_GET_CLASS (item))->
pick (item, p, delta, sticky);
}
return NULL;
}
void
nr_arena_item_request_update (NRArenaItem *item, unsigned int reset,
unsigned int propagate)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
nr_return_if_fail (!(reset & NR_ARENA_ITEM_STATE_INVALID));
if (propagate && !item->propagate)
item->propagate = TRUE;
if (item->state & reset) {
item->state &= ~reset;
if (item->parent) {
nr_arena_item_request_update (item->parent, reset, FALSE);
} else {
nr_arena_request_update (item->arena, item);
}
}
}
void
nr_arena_item_request_render (NRArenaItem *item)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
nr_arena_request_render_rect (item->arena, &item->bbox);
}
/* Public */
NRArenaItem *
nr_arena_item_unparent (NRArenaItem *item)
{
nr_return_val_if_fail (item != NULL, NULL);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (item), NULL);
nr_arena_item_request_render (item);
if (item->parent) {
nr_arena_item_remove_child (item->parent, item);
}
return NULL;
}
void
nr_arena_item_append_child (NRArenaItem *parent, NRArenaItem *child)
{
nr_return_if_fail (parent != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (parent));
nr_return_if_fail (child != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (child));
nr_return_if_fail (parent->arena == child->arena);
nr_return_if_fail (child->parent == NULL);
nr_return_if_fail (child->prev == NULL);
nr_return_if_fail (child->next == NULL);
nr_arena_item_add_child (parent, child, nr_arena_item_last_child (parent));
}
void
nr_arena_item_set_transform (NRArenaItem *item, NR::Matrix const &transform)
{
NRMatrix const t (transform);
nr_arena_item_set_transform (item, &t);
}
void
nr_arena_item_set_transform (NRArenaItem *item, NRMatrix const *transform)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
if (!transform && !item->transform)
return;
const NRMatrix *md = (item->transform) ? item->transform : &NR_MATRIX_IDENTITY;
const NRMatrix *ms = (transform) ? transform : &NR_MATRIX_IDENTITY;
if (!NR_MATRIX_DF_TEST_CLOSE (md, ms, NR_EPSILON)) {
nr_arena_item_request_render (item);
if (!transform || nr_matrix_test_identity (transform, NR_EPSILON)) {
/* Set to identity affine */
item->transform = NULL;
} else {
if (!item->transform)
item->transform = new (GC::ATOMIC) NRMatrix ();
*item->transform = *transform;
}
nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
}
}
void
nr_arena_item_set_opacity (NRArenaItem *item, double opacity)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
nr_arena_item_request_render (item);
item->opacity = (unsigned int) (opacity * 255.9999);
}
void
nr_arena_item_set_sensitive (NRArenaItem *item, unsigned int sensitive)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
/* fixme: mess with pick/repick... */
item->sensitive = sensitive;
}
void
nr_arena_item_set_visible (NRArenaItem *item, unsigned int visible)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
item->visible = visible;
nr_arena_item_request_render (item);
}
void
nr_arena_item_set_clip (NRArenaItem *item, NRArenaItem *clip)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
nr_return_if_fail (!clip || NR_IS_ARENA_ITEM (clip));
if (clip != item->clip) {
nr_arena_item_request_render (item);
if (item->clip)
item->clip = nr_arena_item_detach (item, item->clip);
if (clip)
item->clip = nr_arena_item_attach (item, clip, NULL, NULL);
nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
}
}
void
nr_arena_item_set_mask (NRArenaItem *item, NRArenaItem *mask)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
nr_return_if_fail (!mask || NR_IS_ARENA_ITEM (mask));
if (mask != item->mask) {
nr_arena_item_request_render (item);
if (item->mask)
item->mask = nr_arena_item_detach (item, item->mask);
if (mask)
item->mask = nr_arena_item_attach (item, mask, NULL, NULL);
nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, TRUE);
}
}
void
nr_arena_item_set_order (NRArenaItem *item, int order)
{
nr_return_if_fail (item != NULL);
nr_return_if_fail (NR_IS_ARENA_ITEM (item));
if (!item->parent)
return;
NRArenaItem *children = nr_arena_item_children (item->parent);
NRArenaItem *ref = NULL;
int pos = 0;
for (NRArenaItem *child = children; child != NULL; child = child->next) {
if (pos >= order)
break;
if (child != item) {
ref = child;
pos += 1;
}
}
nr_arena_item_set_child_position (item->parent, item, ref);
}
/** Returns a background image for use with filter effects. */
NRPixBlock *
nr_arena_item_get_background (NRArenaItem const *item, int depth)
{
NRPixBlock *pb;
if (!item->background_pb)
return NULL;
if (item->background_new) {
pb = new NRPixBlock ();
nr_pixblock_setup_fast (pb, item->background_pb->mode,
item->background_pb->area.x0,
item->background_pb->area.y0,
item->background_pb->area.x1,
item->background_pb->area.y1, true);
if (pb->size != NR_PIXBLOCK_SIZE_TINY && pb->data.px == NULL) // allocation failed
return NULL;
} else if (item->parent) {
pb = nr_arena_item_get_background (item->parent, depth + 1);
} else
return NULL;
if (depth > 0)
nr_blit_pixblock_pixblock (pb, item->background_pb);
return pb;
}
/* Helpers */
NRArenaItem *
nr_arena_item_attach (NRArenaItem *parent, NRArenaItem *child,
NRArenaItem *prev, NRArenaItem *next)
{
nr_return_val_if_fail (parent != NULL, NULL);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
nr_return_val_if_fail (child != NULL, NULL);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
nr_return_val_if_fail (child->parent == NULL, NULL);
nr_return_val_if_fail (child->prev == NULL, NULL);
nr_return_val_if_fail (child->next == NULL, NULL);
nr_return_val_if_fail (!prev || NR_IS_ARENA_ITEM (prev), NULL);
nr_return_val_if_fail (!prev || (prev->parent == parent), NULL);
nr_return_val_if_fail (!prev || (prev->next == next), NULL);
nr_return_val_if_fail (!next || NR_IS_ARENA_ITEM (next), NULL);
nr_return_val_if_fail (!next || (next->parent == parent), NULL);
nr_return_val_if_fail (!next || (next->prev == prev), NULL);
child->parent = parent;
child->prev = prev;
child->next = next;
if (prev)
prev->next = child;
if (next)
next->prev = child;
return child;
}
NRArenaItem *
nr_arena_item_detach (NRArenaItem *parent, NRArenaItem *child)
{
nr_return_val_if_fail (parent != NULL, NULL);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (parent), NULL);
nr_return_val_if_fail (child != NULL, NULL);
nr_return_val_if_fail (NR_IS_ARENA_ITEM (child), NULL);
nr_return_val_if_fail (child->parent == parent, NULL);
NRArenaItem *prev = child->prev;
NRArenaItem *next = child->next;
child->parent = NULL;
child->prev = NULL;
child->next = NULL;
if (prev)
prev->next = next;
if (next)
next->prev = prev;
return next;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :