/*
Copyright (C) 2007 Krzysztof Kowalczyk <kkowalczyk@gmail.com>
Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <wildfox@kde.org>
2004, 2005, 2006 Rob Buis <buis@kde.org>
2005, 2007 Apple Inc. All Rights reserved.
2007 Alp Toker <alp.toker@collabora.co.uk>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
aint with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "Path.h"
#include "AffineTransform.h"
#include "CairoPath.h"
#include "FloatRect.h"
#include "NotImplemented.h"
#include "PlatformString.h"
#include <cairo.h>
#include <math.h>
#include <stdio.h>
namespace WebCore {
Path::Path()
: m_path(new CairoPath())
{
}
Path::~Path()
{
delete m_path;
}
Path::Path(const Path& other)
: m_path(new CairoPath())
{
cairo_t* cr = platformPath()->m_cr;
cairo_path_t* p = cairo_copy_path(other.platformPath()->m_cr);
cairo_append_path(cr, p);
cairo_path_destroy(p);
}
Path& Path::operator=(const Path& other)
{
if (&other == this)
return *this;
clear();
cairo_t* cr = platformPath()->m_cr;
cairo_path_t* p = cairo_copy_path(other.platformPath()->m_cr);
cairo_append_path(cr, p);
cairo_path_destroy(p);
return *this;
}
void Path::clear()
{
cairo_t* cr = platformPath()->m_cr;
cairo_new_path(cr);
}
bool Path::isEmpty() const
{
// FIXME: if/when the patch to get current pt return status is applied
// double dx,dy;
// return cairo_get_current_point(cr, &dx, &dy);
cairo_t* cr = platformPath()->m_cr;
cairo_path_t* p = cairo_copy_path(platformPath()->m_cr);
bool hasData = p->num_data;
cairo_path_destroy(p);
return !hasData;
}
void Path::translate(const FloatSize& p)
{
cairo_t* cr = platformPath()->m_cr;
cairo_translate(cr, p.width(), p.height());
}
void Path::moveTo(const FloatPoint& p)
{
cairo_t* cr = platformPath()->m_cr;
cairo_move_to(cr, p.x(), p.y());
}
void Path::addLineTo(const FloatPoint& p)
{
cairo_t* cr = platformPath()->m_cr;
cairo_line_to(cr, p.x(), p.y());
}
void Path::addRect(const FloatRect& rect)
{
cairo_t* cr = platformPath()->m_cr;
cairo_rectangle(cr, rect.x(), rect.y(), rect.width(), rect.height());
}
/*
* inspired by libsvg-cairo
*/
void Path::addQuadCurveTo(const FloatPoint& controlPoint, const FloatPoint& point)
{
cairo_t* cr = platformPath()->m_cr;
double x, y;
double x1 = controlPoint.x();
double y1 = controlPoint.y();
double x2 = point.x();
double y2 = point.y();
cairo_get_current_point(cr, &x, &y);
cairo_curve_to(cr,
x + 2.0 / 3.0 * (x1 - x), y + 2.0 / 3.0 * (y1 - y),
x2 + 2.0 / 3.0 * (x1 - x2), y2 + 2.0 / 3.0 * (y1 - y2),
x2, y2);
}
void Path::addBezierCurveTo(const FloatPoint& controlPoint1, const FloatPoint& controlPoint2, const FloatPoint& controlPoint3)
{
cairo_t* cr = platformPath()->m_cr;
cairo_curve_to(cr, controlPoint1.x(), controlPoint1.y(),
controlPoint2.x(), controlPoint2.y(),
controlPoint3.x(), controlPoint3.y());
}
void Path::addArc(const FloatPoint& p, float r, float sa, float ea, bool clockwise)
{
cairo_t* cr = platformPath()->m_cr;
if (clockwise)
cairo_arc(cr, p.x(), p.y(), r, sa, ea);
else
cairo_arc_negative(cr, p.x(), p.y(), r, sa, ea);
}
void Path::addArcTo(const FloatPoint& p1, const FloatPoint& p2, float radius)
{
// FIXME: cairo_arc_to not yet in cairo see cairo.h
// cairo_arc_to(m_cr, p1.x(), p1.y(), p2.x(), p2.y());
notImplemented();
}
void Path::addEllipse(const FloatRect& rect)
{
cairo_t* cr = platformPath()->m_cr;
cairo_save(cr);
float yRadius = .5 * rect.height();
float xRadius = .5 * rect.width();
cairo_translate(cr, rect.x() + xRadius, rect.y() + yRadius);
cairo_scale(cr, xRadius, yRadius);
cairo_arc(cr, 0., 0., 1., 0., 2 * M_PI);
cairo_restore(cr);
}
void Path::closeSubpath()
{
cairo_t* cr = platformPath()->m_cr;
cairo_close_path(cr);
}
FloatRect Path::boundingRect() const
{
cairo_t* cr = platformPath()->m_cr;
double x0, x1, y0, y1;
cairo_fill_extents(cr, &x0, &y0, &x1, &y1);
return FloatRect(x0, y0, x1 - x0, y1 - y0);
}
bool Path::contains(const FloatPoint& point, WindRule rule) const
{
cairo_t* cr = platformPath()->m_cr;
cairo_fill_rule_t cur = cairo_get_fill_rule(cr);
cairo_set_fill_rule(cr, rule == RULE_EVENODD ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
bool contains = cairo_in_fill(cr, point.x(), point.y());
cairo_set_fill_rule(cr, cur);
return contains;
}
void Path::apply(void* info, PathApplierFunction function) const
{
cairo_t* cr = platformPath()->m_cr;
cairo_path_t* path = cairo_copy_path(cr);
cairo_path_data_t* data;
PathElement pelement;
FloatPoint points[3];
pelement.points = points;
for (int i = 0; i < path->num_data; i += path->data[i].header.length) {
data = &path->data[i];
switch (data->header.type) {
case CAIRO_PATH_MOVE_TO:
pelement.type = PathElementMoveToPoint;
pelement.points[0] = FloatPoint(data[1].point.x,data[1].point.y);
function(info, &pelement);
break;
case CAIRO_PATH_LINE_TO:
pelement.type = PathElementAddLineToPoint;
pelement.points[0] = FloatPoint(data[1].point.x,data[1].point.y);
function(info, &pelement);
break;
case CAIRO_PATH_CURVE_TO:
pelement.type = PathElementAddCurveToPoint;
pelement.points[0] = FloatPoint(data[1].point.x,data[1].point.y);
pelement.points[1] = FloatPoint(data[2].point.x,data[2].point.y);
pelement.points[2] = FloatPoint(data[3].point.x,data[3].point.y);
function(info, &pelement);
break;
case CAIRO_PATH_CLOSE_PATH:
pelement.type = PathElementCloseSubpath;
function(info, &pelement);
break;
}
}
cairo_path_destroy(path);
}
void Path::transform(const AffineTransform& trans)
{
cairo_t* m_cr = platformPath()->m_cr;
cairo_matrix_t c_matrix = cairo_matrix_t(trans);
cairo_transform(m_cr, &c_matrix);
}
String Path::debugString() const
{
String string = "";
cairo_path_t* path = cairo_copy_path(platformPath()->m_cr);
cairo_path_data_t* data;
if (!path->num_data )
string = "EMPTY";
for (int i = 0; i < path->num_data; i += path->data[i].header.length) {
data = &path->data[i];
switch (data->header.type) {
case CAIRO_PATH_MOVE_TO:
string += String::format("M %.2f,%.2f",
data[1].point.x, data[1].point.y);
break;
case CAIRO_PATH_LINE_TO:
string += String::format("L %.2f,%.2f",
data[1].point.x, data[1].point.y);
break;
case CAIRO_PATH_CURVE_TO:
string += String::format("C %.2f,%.2f,%.2f,%.2f,%.2f,%.2f",
data[1].point.x, data[1].point.y,
data[2].point.x, data[2].point.y,
data[3].point.x, data[3].point.y);
break;
case CAIRO_PATH_CLOSE_PATH:
string += "X";
break;
}
}
cairo_path_destroy(path);
return string;
}
} // namespace WebCore