void ofCairoRenderer::drawPath(const ofShape & path,bool is_subpath){
if(!surface || !cr) return;
const vector<ofShape::Command> & commands = path.getCommands();
if(is_subpath)
cairo_new_sub_path(cr);
else
cairo_new_path(cr);
for(int i=0; i<(int)commands.size(); i++){
switch(commands[i].type){
case ofShape::Command::lineTo:
curvePoints.clear();
cairo_line_to(cr,commands[i].to.x,commands[i].to.y);
break;
case ofShape::Command::curveTo:
curvePoints.push_back(commands[i].to);
//code adapted from ofxVectorGraphics to convert catmull rom to bezier
if(curvePoints.size()==4){
ofPoint p1=curvePoints[0];
ofPoint p2=curvePoints[1];
ofPoint p3=curvePoints[2];
ofPoint p4=curvePoints[3];
//SUPER WEIRD MAGIC CONSTANT = 1/6 (this works 100% can someone explain it?)
ofPoint cp1 = p2 + ( p3 - p1 ) * (1.0/6);
ofPoint cp2 = p3 + ( p2 - p4 ) * (1.0/6);
cairo_curve_to( cr, cp1.x, cp1.y, cp2.x, cp2.y, p3.x, p3.y );
curvePoints.pop_front();
}
break;
case ofShape::Command::bezierTo:
curvePoints.clear();
cairo_curve_to(cr,commands[i].cp1.x,commands[i].cp1.y,commands[i].cp2.x,commands[i].cp2.y,commands[i].to.x,commands[i].to.y);
break;
case ofShape::Command::quadBezierTo:
curvePoints.clear();
cairo_curve_to(cr,commands[i].cp1.x,commands[i].cp1.y,commands[i].cp2.x,commands[i].cp2.y,commands[i].to.x,commands[i].to.y);
break;
case ofShape::Command::arc:
curvePoints.clear();
// elliptic arcs not directly supported in cairo, lets scale y
if(commands[i].radiusX!=commands[i].radiusY){
float ellipse_ratio = commands[i].radiusY/commands[i].radiusX;
pushMatrix();
translate(0,-commands[i].to.y*ellipse_ratio);
scale(1,ellipse_ratio);
translate(0,commands[i].to.y*1/ellipse_ratio);
cairo_arc(cr,commands[i].to.x,commands[i].to.y,commands[i].radiusX,commands[i].angleBegin,commands[i].angleEnd);
//cairo_set_matrix(cr,&stored_matrix);
popMatrix();
}else{
cairo_arc(cr,commands[i].to.x,commands[i].to.y,commands[i].radiusX,commands[i].angleBegin,commands[i].angleEnd);
}
break;
}
}
if(path.isClosed()){
cairo_close_path(cr);
}
const vector<ofShape> &subpaths = path.getSubShapes();
for(int i=0;i<(int)subpaths.size();i++){
drawPath(subpaths[i],true);
}
cairo_fill_rule_t cairo_poly_mode;
if(path.getWindingMode()==OF_POLY_WINDING_ODD) cairo_poly_mode=CAIRO_FILL_RULE_EVEN_ODD;
else cairo_poly_mode=CAIRO_FILL_RULE_WINDING;
cairo_set_fill_rule(cr,cairo_poly_mode);
if(path.getStrokeWidth()>0){
ofColor c = path.getStrokeColor() * ofGetStyle().color;
c.a = path.getStrokeColor().a/255. * ofGetStyle().color.a;
cairo_set_source_rgba(cr, (float)c.r/255.0, (float)c.g/255.0, (float)c.b/255.0, (float)c.a/255.0);
cairo_set_line_width( cr, path.getStrokeWidth() );
if(path.isFilled())
cairo_stroke_preserve( cr );
else
cairo_stroke( cr );
}
if(path.isFilled()){
ofColor c = path.getFillColor() * ofGetStyle().color;
c.a = path.getFillColor().a/255. * ofGetStyle().color.a;
cairo_set_source_rgba(cr, (float)c.r/255.0, (float)c.g/255.0, (float)c.b/255.0, (float)c.a/255.0);
cairo_fill( cr );
}
}
void ofCairoRenderer::draw(ofShape & shape){
cairo_new_path(cr);
vector<ofSubPath> & paths = shape.getSubPaths();
for(int i=0;i<(int)paths.size();i++){
draw(paths[i]);
}
cairo_fill_rule_t cairo_poly_mode;
if(shape.getWindingMode()==OF_POLY_WINDING_ODD) cairo_poly_mode=CAIRO_FILL_RULE_EVEN_ODD;
else cairo_poly_mode=CAIRO_FILL_RULE_WINDING;
cairo_set_fill_rule(cr,cairo_poly_mode);
ofColor prevColor;
if(shape.getUseShapeColor()){
prevColor = ofGetStyle().color;
}
if(shape.isFilled()){
if(shape.getUseShapeColor()){
ofColor c = shape.getFillColor() * ofGetStyle().color;
c.a = shape.getFillColor().a/255. * ofGetStyle().color.a;
cairo_set_source_rgba(cr, (float)c.r/255.0, (float)c.g/255.0, (float)c.b/255.0, (float)c.a/255.0);
}
if(shape.hasOutline()){
cairo_fill_preserve( cr );
}else{
cairo_fill(cr);
}
}
if(shape.hasOutline()){
float lineWidth = ofGetStyle().lineWidth;
if(shape.getUseShapeColor()){
ofColor c = shape.getFillColor() * ofGetStyle().color;
c.a = shape.getFillColor().a/255. * ofGetStyle().color.a;
cairo_set_source_rgba(cr, (float)c.r/255.0, (float)c.g/255.0, (float)c.b/255.0, (float)c.a/255.0);
}
cairo_set_line_width( cr, shape.getStrokeWidth() );
cairo_stroke( cr );
cairo_set_line_width( cr, lineWidth );
}
if(shape.getUseShapeColor()){
setColor(prevColor);
}
ofPopStyle();
}
void ofGLRenderer::draw(ofShape & path){
ofShapeTessellation & shape = path.getTessellation();
draw(shape);
}
