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/**
* @file
* Group belonging to an SVG drawing element.
*//*
* Authors:
* Krzysztof Kosiński <tweenk.pl@gmail.com>
*
* Copyright (C) 2011 Authors
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "display/cairo-utils.h"
#include "display/canvas-bpath.h" // for SPWindRule (WTF!)
#include "display/drawing.h"
#include "display/drawing-context.h"
#include "display/drawing-surface.h"
#include "display/drawing-text.h"
#include "helper/geom.h"
#include "libnrtype/font-instance.h"
#include "style.h"
namespace Inkscape {
DrawingGlyphs::DrawingGlyphs(Drawing &drawing)
: DrawingItem(drawing)
, _font(NULL)
, _glyph(0)
{}
DrawingGlyphs::~DrawingGlyphs()
{
if (_font) {
_font->Unref();
_font = NULL;
}
}
void
DrawingGlyphs::setGlyph(font_instance *font, int glyph, Geom::Affine const &trans)
{
_markForRendering();
setTransform(trans);
if (font) font->Ref();
if (_font) _font->Unref();
_font = font;
_glyph = glyph;
_markForUpdate(STATE_ALL, false);
}
unsigned DrawingGlyphs::_updateItem(Geom::IntRect const &/*area*/, UpdateContext const &ctx, unsigned /*flags*/, unsigned /*reset*/)
{
DrawingText *ggroup = dynamic_cast<DrawingText *>(_parent);
if (!ggroup) throw InvalidItemException();
if (!_font || !ggroup->_style) return STATE_ALL;
if (ggroup->_nrstyle.fill.type == NRStyle::PAINT_NONE &&
ggroup->_nrstyle.stroke.type == NRStyle::PAINT_NONE)
{
return STATE_ALL;
}
_pick_bbox = Geom::IntRect();
_bbox = Geom::IntRect();
Geom::OptRect b = bounds_exact_transformed(*_font->PathVector(_glyph), ctx.ctm);
if (b && ggroup->_nrstyle.stroke.type != NRStyle::PAINT_NONE) {
float width, scale;
scale = ctx.ctm.descrim();
if (_transform) scale /= _transform->descrim(); // FIXME temporary hack
width = MAX(0.125, ggroup->_nrstyle.stroke_width * scale);
if ( fabs(ggroup->_nrstyle.stroke_width * scale) > 0.01 ) { // FIXME: this is always true
b->expandBy(0.5 * width);
}
// save bbox without miters for picking
_pick_bbox = b->roundOutwards();
float miterMax = width * ggroup->_nrstyle.miter_limit;
if ( miterMax > 0.01 ) {
// grunt mode. we should compute the various miters instead
// (one for each point on the curve)
b->expandBy(miterMax);
}
_bbox = b->roundOutwards();
} else if (b) {
_bbox = b->roundOutwards();
_pick_bbox = *_bbox;
}
return STATE_ALL;
}
DrawingItem *
DrawingGlyphs::_pickItem(Geom::Point const &p, double delta, unsigned /*flags*/)
{
if (!_font || !_bbox) return NULL;
// With text we take a simple approach: pick if the point is in a characher bbox
Geom::Rect expanded(_pick_bbox);
expanded.expandBy(delta);
if (expanded.contains(p)) return this;
return NULL;
}
DrawingText::DrawingText(Drawing &drawing)
: DrawingGroup(drawing)
{}
DrawingText::~DrawingText()
{}
void
DrawingText::clear()
{
_markForRendering();
_children.clear_and_dispose(DeleteDisposer());
}
void
DrawingText::addComponent(font_instance *font, int glyph, Geom::Affine const &trans)
{
if (!font || !font->PathVector(glyph)) return;
_markForRendering();
DrawingGlyphs *ng = new DrawingGlyphs(_drawing);
ng->setGlyph(font, glyph, trans);
appendChild(ng);
}
void
DrawingText::setStyle(SPStyle *style)
{
_nrstyle.set(style);
DrawingGroup::setStyle(style);
}
unsigned
DrawingText::_updateItem(Geom::IntRect const &area, UpdateContext const &ctx, unsigned flags, unsigned reset)
{
_nrstyle.update();
return DrawingGroup::_updateItem(area, ctx, flags, reset);
}
unsigned DrawingText::_renderItem(DrawingContext &ct, Geom::IntRect const &/*area*/, unsigned /*flags*/, DrawingItem * /*stop_at*/)
{
if (_drawing.outline()) {
guint32 rgba = _drawing.outlinecolor;
Inkscape::DrawingContext::Save save(ct);
ct.setSource(rgba);
ct.setTolerance(1.25); // low quality, but good enough for outline mode
for (ChildrenList::iterator i = _children.begin(); i != _children.end(); ++i) {
DrawingGlyphs *g = dynamic_cast<DrawingGlyphs *>(&*i);
if (!g) throw InvalidItemException();
Inkscape::DrawingContext::Save save(ct);
// skip glpyhs with singular transforms
if (g->_ctm.isSingular()) continue;
ct.transform(g->_ctm);
ct.path(*g->_font->PathVector(g->_glyph));
ct.fill();
}
return RENDER_OK;
}
// NOTE: this is very similar to drawing-shape.cpp; the only difference is in path feeding
bool has_stroke, has_fill;
has_fill = _nrstyle.prepareFill(ct, _item_bbox);
has_stroke = _nrstyle.prepareStroke(ct, _item_bbox);
if (has_fill || has_stroke) {
for (ChildrenList::iterator i = _children.begin(); i != _children.end(); ++i) {
DrawingGlyphs *g = dynamic_cast<DrawingGlyphs *>(&*i);
if (!g) throw InvalidItemException();
Inkscape::DrawingContext::Save save(ct);
if (g->_ctm.isSingular()) continue;
ct.transform(g->_ctm);
ct.path(*g->_font->PathVector(g->_glyph));
}
Inkscape::DrawingContext::Save save(ct);
ct.transform(_ctm);
if (has_fill) {
_nrstyle.applyFill(ct);
ct.fillPreserve();
}
if (has_stroke) {
_nrstyle.applyStroke(ct);
ct.strokePreserve();
}
ct.newPath(); // clear path
}
return RENDER_OK;
}
void DrawingText::_clipItem(DrawingContext &ct, Geom::IntRect const &/*area*/)
{
Inkscape::DrawingContext::Save save(ct);
// handle clip-rule
if (_style) {
if (_style->clip_rule.computed == SP_WIND_RULE_EVENODD) {
ct.setFillRule(CAIRO_FILL_RULE_EVEN_ODD);
} else {
ct.setFillRule(CAIRO_FILL_RULE_WINDING);
}
}
for (ChildrenList::iterator i = _children.begin(); i != _children.end(); ++i) {
DrawingGlyphs *g = dynamic_cast<DrawingGlyphs *>(&*i);
if (!g) throw InvalidItemException();
Inkscape::DrawingContext::Save save(ct);
ct.transform(g->_ctm);
ct.path(*g->_font->PathVector(g->_glyph));
}
ct.fill();
}
DrawingItem *
DrawingText::_pickItem(Geom::Point const &p, double delta, unsigned flags)
{
DrawingItem *picked = DrawingGroup::_pickItem(p, delta, flags);
if (picked) return this;
return NULL;
}
bool
DrawingText::_canClip()
{
return true;
}
} // end namespace Inkscape
/*
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:fileencoding=utf-8:textwidth=99 :
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