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Diffstat (limited to 'WebCore/platform/graphics/cairo/PathCairo.cpp')
-rw-r--r-- | WebCore/platform/graphics/cairo/PathCairo.cpp | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/WebCore/platform/graphics/cairo/PathCairo.cpp b/WebCore/platform/graphics/cairo/PathCairo.cpp deleted file mode 100644 index 03f1d10..0000000 --- a/WebCore/platform/graphics/cairo/PathCairo.cpp +++ /dev/null @@ -1,342 +0,0 @@ -/* - 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@atoker.com> - 2008 Dirk Schulze <krit@webkit.org> - - 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 "GraphicsContext.h" -#include "OwnPtrCairo.h" -#include "PlatformString.h" -#include "StrokeStyleApplier.h" -#include <cairo.h> -#include <math.h> -#include <wtf/MathExtras.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()->context(); - OwnPtr<cairo_path_t> p(cairo_copy_path(other.platformPath()->context())); - cairo_append_path(cr, p.get()); -} - -Path& Path::operator=(const Path& other) -{ - if (&other == this) - return *this; - - clear(); - cairo_t* cr = platformPath()->context(); - OwnPtr<cairo_path_t> p(cairo_copy_path(other.platformPath()->context())); - cairo_append_path(cr, p.get()); - return *this; -} - -void Path::clear() -{ - cairo_t* cr = platformPath()->context(); - cairo_new_path(cr); -} - -bool Path::isEmpty() const -{ - return !cairo_has_current_point(platformPath()->context()); -} - -bool Path::hasCurrentPoint() const -{ - return !isEmpty(); -} - -FloatPoint Path::currentPoint() const -{ - // FIXME: Is this the correct way? - double x; - double y; - cairo_get_current_point(platformPath()->context(), &x, &y); - return FloatPoint(x, y); -} - -void Path::translate(const FloatSize& p) -{ - cairo_t* cr = platformPath()->context(); - cairo_translate(cr, -p.width(), -p.height()); -} - -void Path::moveTo(const FloatPoint& p) -{ - cairo_t* cr = platformPath()->context(); - cairo_move_to(cr, p.x(), p.y()); -} - -void Path::addLineTo(const FloatPoint& p) -{ - cairo_t* cr = platformPath()->context(); - cairo_line_to(cr, p.x(), p.y()); -} - -void Path::addRect(const FloatRect& rect) -{ - cairo_t* cr = platformPath()->context(); - 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()->context(); - 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()->context(); - 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 anticlockwise) -{ - // http://bugs.webkit.org/show_bug.cgi?id=16449 - // cairo_arc() functions hang or crash when passed inf as radius or start/end angle - if (!isfinite(r) || !isfinite(sa) || !isfinite(ea)) - return; - - cairo_t* cr = platformPath()->context(); - if (anticlockwise) - cairo_arc_negative(cr, p.x(), p.y(), r, sa, ea); - else - cairo_arc(cr, p.x(), p.y(), r, sa, ea); -} - -void Path::addArcTo(const FloatPoint& p1, const FloatPoint& p2, float radius) -{ - if (isEmpty()) - return; - - cairo_t* cr = platformPath()->context(); - - double x0, y0; - cairo_get_current_point(cr, &x0, &y0); - FloatPoint p0(x0, y0); - if ((p1.x() == p0.x() && p1.y() == p0.y()) || (p1.x() == p2.x() && p1.y() == p2.y()) || radius == 0.f) { - cairo_line_to(cr, p1.x(), p1.y()); - return; - } - - FloatPoint p1p0((p0.x() - p1.x()),(p0.y() - p1.y())); - FloatPoint p1p2((p2.x() - p1.x()),(p2.y() - p1.y())); - float p1p0_length = sqrtf(p1p0.x() * p1p0.x() + p1p0.y() * p1p0.y()); - float p1p2_length = sqrtf(p1p2.x() * p1p2.x() + p1p2.y() * p1p2.y()); - - double cos_phi = (p1p0.x() * p1p2.x() + p1p0.y() * p1p2.y()) / (p1p0_length * p1p2_length); - // all points on a line logic - if (cos_phi == -1) { - cairo_line_to(cr, p1.x(), p1.y()); - return; - } - if (cos_phi == 1) { - // add infinite far away point - unsigned int max_length = 65535; - double factor_max = max_length / p1p0_length; - FloatPoint ep((p0.x() + factor_max * p1p0.x()), (p0.y() + factor_max * p1p0.y())); - cairo_line_to(cr, ep.x(), ep.y()); - return; - } - - float tangent = radius / tan(acos(cos_phi) / 2); - float factor_p1p0 = tangent / p1p0_length; - FloatPoint t_p1p0((p1.x() + factor_p1p0 * p1p0.x()), (p1.y() + factor_p1p0 * p1p0.y())); - - FloatPoint orth_p1p0(p1p0.y(), -p1p0.x()); - float orth_p1p0_length = sqrt(orth_p1p0.x() * orth_p1p0.x() + orth_p1p0.y() * orth_p1p0.y()); - float factor_ra = radius / orth_p1p0_length; - - // angle between orth_p1p0 and p1p2 to get the right vector orthographic to p1p0 - double cos_alpha = (orth_p1p0.x() * p1p2.x() + orth_p1p0.y() * p1p2.y()) / (orth_p1p0_length * p1p2_length); - if (cos_alpha < 0.f) - orth_p1p0 = FloatPoint(-orth_p1p0.x(), -orth_p1p0.y()); - - FloatPoint p((t_p1p0.x() + factor_ra * orth_p1p0.x()), (t_p1p0.y() + factor_ra * orth_p1p0.y())); - - // calculate angles for addArc - orth_p1p0 = FloatPoint(-orth_p1p0.x(), -orth_p1p0.y()); - float sa = acos(orth_p1p0.x() / orth_p1p0_length); - if (orth_p1p0.y() < 0.f) - sa = 2 * piDouble - sa; - - // anticlockwise logic - bool anticlockwise = false; - - float factor_p1p2 = tangent / p1p2_length; - FloatPoint t_p1p2((p1.x() + factor_p1p2 * p1p2.x()), (p1.y() + factor_p1p2 * p1p2.y())); - FloatPoint orth_p1p2((t_p1p2.x() - p.x()),(t_p1p2.y() - p.y())); - float orth_p1p2_length = sqrtf(orth_p1p2.x() * orth_p1p2.x() + orth_p1p2.y() * orth_p1p2.y()); - float ea = acos(orth_p1p2.x() / orth_p1p2_length); - if (orth_p1p2.y() < 0) - ea = 2 * piDouble - ea; - if ((sa > ea) && ((sa - ea) < piDouble)) - anticlockwise = true; - if ((sa < ea) && ((ea - sa) > piDouble)) - anticlockwise = true; - - cairo_line_to(cr, t_p1p0.x(), t_p1p0.y()); - - addArc(p, radius, sa, ea, anticlockwise); -} - -void Path::addEllipse(const FloatRect& rect) -{ - cairo_t* cr = platformPath()->context(); - 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 * piDouble); - cairo_restore(cr); -} - -void Path::closeSubpath() -{ - cairo_t* cr = platformPath()->context(); - cairo_close_path(cr); -} - -FloatRect Path::boundingRect() const -{ - cairo_t* cr = platformPath()->context(); - double x0, x1, y0, y1; - cairo_path_extents(cr, &x0, &y0, &x1, &y1); - return FloatRect(x0, y0, x1 - x0, y1 - y0); -} - -FloatRect Path::strokeBoundingRect(StrokeStyleApplier* applier) -{ - cairo_t* cr = platformPath()->context(); - if (applier) { - GraphicsContext gc(cr); - applier->strokeStyle(&gc); - } - - double x0, x1, y0, y1; - cairo_stroke_extents(cr, &x0, &y0, &x1, &y1); - return FloatRect(x0, y0, x1 - x0, y1 - y0); -} - -bool Path::contains(const FloatPoint& point, WindRule rule) const -{ - if (!isfinite(point.x()) || !isfinite(point.y())) - return false; - cairo_t* cr = platformPath()->context(); - 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; -} - -bool Path::strokeContains(StrokeStyleApplier* applier, const FloatPoint& point) const -{ - ASSERT(applier); - cairo_t* cr = platformPath()->context(); - GraphicsContext gc(cr); - applier->strokeStyle(&gc); - - return cairo_in_stroke(cr, point.x(), point.y()); -} - -void Path::apply(void* info, PathApplierFunction function) const -{ - cairo_t* cr = platformPath()->context(); - OwnPtr<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; - } - } -} - -void Path::transform(const AffineTransform& trans) -{ - cairo_t* cr = platformPath()->context(); - cairo_matrix_t c_matrix = cairo_matrix_t(trans); - cairo_matrix_invert(&c_matrix); - cairo_transform(cr, &c_matrix); -} - -} // namespace WebCore |