/**
* Rasterize the clipping path.
* This method submits drawing operations required to draw a basic filled shape
* of the item to the supplied drawing context. Rendering is limited to the
* given area. The rendering of the clipped object is composited into
* the result of this call using the IN operator. See the implementation
* of render() for details.
*/
void
DrawingItem::clip(Inkscape::DrawingContext &dc, Geom::IntRect const &area)
{
// don't bother if the object does not implement clipping (e.g. DrawingImage)
if (!_canClip()) return;
if (!_visible) return;
if (!area.intersects(_bbox)) return;
dc.setSource(0,0,0,1);
dc.pushGroup();
// rasterize the clipping path
_clipItem(dc, area);
if (_clip) {
// The item used as the clipping path itself has a clipping path.
// Render this item's clipping path onto a temporary surface, then composite it
// with the item using the IN operator
dc.pushGroup();
_clip->clip(dc, area);
dc.popGroupToSource();
dc.setOperator(CAIRO_OPERATOR_IN);
dc.paint();
}
dc.popGroupToSource();
dc.setOperator(CAIRO_OPERATOR_OVER);
dc.paint();
dc.setSource(0,0,0,0);
}
void NRStyle::applyTextDecorationStroke(Inkscape::DrawingContext &dc)
{
dc.setSource(text_decoration_stroke_pattern);
dc.setLineWidth(text_decoration_stroke_width);
dc.setLineCap(CAIRO_LINE_CAP_BUTT);
dc.setLineJoin(CAIRO_LINE_JOIN_MITER);
dc.setMiterLimit(miter_limit);
cairo_set_dash(dc.raw(), 0, 0, 0.0); // fixme (no dash)
}
void NRStyle::applyStroke(Inkscape::DrawingContext &dc)
{
dc.setSource(stroke_pattern);
dc.setLineWidth(stroke_width);
dc.setLineCap(line_cap);
dc.setLineJoin(line_join);
dc.setMiterLimit(miter_limit);
cairo_set_dash(dc.raw(), dash, n_dash, dash_offset); // fixme
}
bool NRStyle::prepareTextDecorationStroke(Inkscape::DrawingContext &dc, Geom::OptRect const &paintbox)
{
if (!text_decoration_stroke_pattern) {
switch (text_decoration_stroke.type) {
case PAINT_SERVER: {
text_decoration_stroke_pattern = text_decoration_stroke.server->pattern_new(dc.raw(), paintbox, text_decoration_stroke.opacity);
} break;
case PAINT_COLOR: {
SPColor const &c = text_decoration_stroke.color;
text_decoration_stroke_pattern = cairo_pattern_create_rgba(
c.v.c[0], c.v.c[1], c.v.c[2], text_decoration_stroke.opacity);
} break;
default: break;
}
}
if (!text_decoration_stroke_pattern) return false;
return true;
}
bool NRStyle::prepareStroke(Inkscape::DrawingContext &ct, Geom::OptRect const &paintbox)
{
if (!stroke_pattern) {
switch (stroke.type) {
case PAINT_SERVER: {
stroke_pattern = sp_paint_server_create_pattern(stroke.server, ct.raw(), paintbox, stroke.opacity);
} break;
case PAINT_COLOR: {
SPColor const &c = stroke.color;
stroke_pattern = cairo_pattern_create_rgba(
c.v.c[0], c.v.c[1], c.v.c[2], stroke.opacity);
} break;
default: break;
}
}
if (!stroke_pattern) return false;
return true;
}
bool NRStyle::prepareFill(Inkscape::DrawingContext &dc, Geom::OptRect const &paintbox)
{
// update fill pattern
if (!fill_pattern) {
switch (fill.type) {
case PAINT_SERVER: {
fill_pattern = fill.server->pattern_new(dc.raw(), paintbox, fill.opacity);
} break;
case PAINT_COLOR: {
SPColor const &c = fill.color;
fill_pattern = cairo_pattern_create_rgba(
c.v.c[0], c.v.c[1], c.v.c[2], fill.opacity);
} break;
default: break;
}
}
if (!fill_pattern) return false;
return true;
}
void NRStyle::applyTextDecorationFill(Inkscape::DrawingContext &dc)
{
dc.setSource(text_decoration_fill_pattern);
// Fill rule does not matter, no intersections.
}
void NRStyle::applyFill(Inkscape::DrawingContext &dc)
{
dc.setSource(fill_pattern);
dc.setFillRule(fill_rule);
}