void CairoContext::set_source_rgba32(guint32 color)
{
double red = SP_RGBA32_R_F(color);
double gre = SP_RGBA32_G_F(color);
double blu = SP_RGBA32_B_F(color);
double alp = SP_RGBA32_A_F(color);
cairo_set_source_rgba(cobj(), red, gre, blu, alp);
}
void ColorPicker::on_clicked()
{
if (_colorSelector)
{
SPColor color;
color.set( _rgba );
_colorSelector->base->setColorAlpha(color, SP_RGBA32_A_F(_rgba));
}
_colorSelectorDialog.show();
}
void ColorPicker::setRgba32 (guint32 rgba)
{
if (_in_use) return;
_preview.setRgba32 (rgba);
_rgba = rgba;
if (_colorSelector)
{
SPColor color;
color.set( rgba );
_colorSelector->base->setColorAlpha(color, SP_RGBA32_A_F(rgba));
}
}
static void
sp_ctrlline_render (SPCanvasItem *item, SPCanvasBuf *buf)
{
SPCtrlLine *cl = SP_CTRLLINE (item);
if (!buf->ct)
return;
if (cl->s == cl->e)
return;
sp_canvas_prepare_buffer (buf);
guint32 rgba = cl->rgba;
cairo_set_source_rgba(buf->ct, SP_RGBA32_B_F(rgba), SP_RGBA32_G_F(rgba), SP_RGBA32_R_F(rgba), SP_RGBA32_A_F(rgba));
cairo_set_line_width(buf->ct, 1);
cairo_new_path(buf->ct);
Geom::Point s = cl->s * cl->affine;
Geom::Point e = cl->e * cl->affine;
cairo_move_to (buf->ct, s[Geom::X] - buf->rect.x0, s[Geom::Y] - buf->rect.y0);
cairo_line_to (buf->ct, e[Geom::X] - buf->rect.x0, e[Geom::Y] - buf->rect.y0);
cairo_stroke(buf->ct);
}
void
ink_cairo_set_source_rgba32(cairo_t *ct, guint32 rgba)
{
cairo_set_source_rgba(ct, SP_RGBA32_R_F(rgba), SP_RGBA32_G_F(rgba), SP_RGBA32_B_F(rgba), SP_RGBA32_A_F(rgba));
}
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);
}
static void
sp_ctrlquadr_render (SPCanvasItem *item, SPCanvasBuf *buf)
{
SPCtrlQuadr *cq = SP_CTRLQUADR (item);
if (!buf->ct)
return;
// RGB / BGR
cairo_new_path(buf->ct);
Geom::Point min = buf->rect.min();
Geom::Point p1 = (cq->p1 * cq->affine) - min;
Geom::Point p2 = (cq->p2 * cq->affine) - min;
Geom::Point p3 = (cq->p3 * cq->affine) - min;
Geom::Point p4 = (cq->p4 * cq->affine) - min;
cairo_move_to(buf->ct, p1[Geom::X], p1[Geom::Y]);
cairo_line_to(buf->ct, p2[Geom::X], p2[Geom::Y]);
cairo_line_to(buf->ct, p3[Geom::X], p3[Geom::Y]);
cairo_line_to(buf->ct, p4[Geom::X], p4[Geom::Y]);
cairo_line_to(buf->ct, p1[Geom::X], p1[Geom::Y]);
// FIXME: this is supposed to draw inverse but cairo apparently is unable of this trick :(
//cairo_set_operator (buf->ct, CAIRO_OPERATOR_XOR);
cairo_set_source_rgba(buf->ct, SP_RGBA32_B_F(cq->rgba), SP_RGBA32_G_F(cq->rgba), SP_RGBA32_R_F(cq->rgba), SP_RGBA32_A_F(cq->rgba));
cairo_fill(buf->ct);
}