static void
sp_gradient_simplify(SPGradientContext *rc, double tolerance)
{
SPDocument *doc = NULL;
GrDrag *drag = rc->_grdrag;
GSList *these_stops = NULL;
GSList *next_stops = NULL;
std::vector<Geom::Point> coords = sp_gradient_context_get_stop_intervals (drag, &these_stops, &next_stops);
GSList *todel = NULL;
GSList *i = these_stops;
GSList *j = next_stops;
for (; i != NULL && j != NULL; i = i->next, j = j->next) {
SPStop *stop0 = (SPStop *) i->data;
SPStop *stop1 = (SPStop *) j->data;
gint i1 = g_slist_index(these_stops, stop1);
if (i1 != -1) {
GSList *next_next = g_slist_nth (next_stops, i1);
if (next_next) {
SPStop *stop2 = (SPStop *) next_next->data;
if (g_slist_find(todel, stop0) || g_slist_find(todel, stop2))
continue;
guint32 const c0 = sp_stop_get_rgba32(stop0);
guint32 const c2 = sp_stop_get_rgba32(stop2);
guint32 const c1r = sp_stop_get_rgba32(stop1);
guint32 c1 = average_color (c0, c2,
(stop1->offset - stop0->offset) / (stop2->offset - stop0->offset));
double diff =
sqr(SP_RGBA32_R_F(c1) - SP_RGBA32_R_F(c1r)) +
sqr(SP_RGBA32_G_F(c1) - SP_RGBA32_G_F(c1r)) +
sqr(SP_RGBA32_B_F(c1) - SP_RGBA32_B_F(c1r)) +
sqr(SP_RGBA32_A_F(c1) - SP_RGBA32_A_F(c1r));
if (diff < tolerance)
todel = g_slist_prepend (todel, stop1);
}
}
}
for (i = todel; i != NULL; i = i->next) {
SPStop *stop = (SPStop*) i->data;
doc = SP_OBJECT_DOCUMENT (stop);
Inkscape::XML::Node * parent = SP_OBJECT_REPR(stop)->parent();
parent->removeChild(SP_OBJECT_REPR(stop));
}
if (g_slist_length(todel) > 0) {
sp_document_done (doc, SP_VERB_CONTEXT_GRADIENT, _("Simplify gradient"));
drag->local_change = true;
drag->updateDraggers();
drag->selectByCoords(coords);
}
g_slist_free (todel);
g_slist_free (these_stops);
g_slist_free (next_stops);
}
bool Plasma::do_plasma(int x1, int y1, int x2, int y2, int depth, int scale_depth)
{
Color tl, ml, bl, tm, mm, bm, tr, mr, br;
int xm = ( x1 + x2 )/ 2;
int ym = ( y1 + y2 )/ 2;
if(depth == -1)
{
random_rbg(tl);
random_rbg(ml);
random_rbg(bl);
random_rbg(tm);
random_rbg(mm);
random_rbg(bm);
random_rbg(tr);
random_rbg(mr);
random_rbg(br);
set_pixel(m_pSurface, x1, y1, tl);
set_pixel(m_pSurface, x1, ym, ml);
set_pixel(m_pSurface, x1, y2, bl);
set_pixel(m_pSurface, xm, y1, tm);
set_pixel(m_pSurface, xm, ym, mm);
set_pixel(m_pSurface, xm, y2, bm);
set_pixel(m_pSurface, x2, y1, tr);
set_pixel(m_pSurface, x2, ym, mr);
set_pixel(m_pSurface, x2, y2, br);
return false;
}
if(depth == 0)
{
if(x1 == x2 && y1 == y2)
return false;
get_pixel(m_pSurface, x1, y1, tl);
get_pixel(m_pSurface, x1, y2, bl);
get_pixel(m_pSurface, x2, y1, tr);
get_pixel(m_pSurface, x2, y2, br);
int ran = (int)((256.0 / (2 * scale_depth)) * m_fTurbulance);
if (xm != x1 || xm != x2)
{
// Left
ml = average_color(tl, bl);
add_random(ml, ran);
set_pixel(m_pSurface, x1, ym, ml);
if (x1 != x2)
{
// Right
mr = average_color(tr, br);
add_random(mr, ran);
set_pixel(m_pSurface, x2, ym, mr);
}
}
if (ym != y1 || ym != y2)
{
if (x1 != xm || ym != y2)
{
// Bottom
Color mb = average_color(bl, br);
add_random(mb, ran);
set_pixel(m_pSurface, xm, y2, mb);
}
if (y1 != y2)
{
// Top
Color mt = average_color(tl, tr);
add_random(mt, ran);
set_pixel(m_pSurface, xm, y1, mt);
}
}
if (y1 != y2 || x1 != x2)
{
// Middle pixel
Color tmp;
mm = average_color(tl, br);
tmp = average_color(bl, tr);
mm = average_color(mm, tmp);
add_random(mm, ran);
set_pixel(m_pSurface, xm, ym, mm);
}
return x2 - x1 < 3 && y2 - y1 < 3;
} //depth == 0
if (x1 < x2 || y1 < y2)
{
// Top left.
do_plasma (x1, y1, xm, ym, depth - 1, scale_depth + 1);
/* Bottom left. */
do_plasma (x1, ym, xm, y2, depth - 1, scale_depth + 1);
/* Top right. */
do_plasma (xm, y1, x2, ym, depth - 1, scale_depth + 1);
/* Bottom right. */
return do_plasma (xm, ym, x2, y2, depth - 1, scale_depth + 1);
}
return true;
}
