• Skip to content
  • Skip to link menu
  • KDE API Reference
  • kdelibs-4.14.38 API Reference
  • KDE Home
  • Contact Us
 

KHTML

  • khtml
  • svg
  • graphics
  • qt
SVGPaintServerRadialGradientQt.cpp
Go to the documentation of this file.
1/*
2 Copyright (C) 2006 Nikolas Zimmermann <wildfox@kde.org>
3
4 This file is part of the KDE project
5
6 This library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public
8 License as published by the Free Software Foundation; either
9 version 2 of the License, or (at your option) any later version.
10
11 This library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
15
16 You should have received a copy of the GNU Library General Public License
17 aint with this library; see the file COPYING.LIB. If not, write to
18 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 Boston, MA 02110-1301, USA.
20*/
21
22#include "config.h"
23#include "wtf/Platform.h"
24
25#if ENABLE(SVG)
26#include "SVGPaintServerRadialGradient.h"
27
28/*#include "GraphicsContext.h"*/
29#include "RenderPath.h"
30
31#include <math.h>
32#include <QPainter>
33#include <QPainterPath>
34#include <QRadialGradient>
35
36namespace WebCore {
37
38QGradient SVGPaintServerRadialGradient::setupGradient(QPainter* painter, QPainterPath* painterPath, const RenderObject* object) const
39{
40 Q_UNUSED(object);
41 //QPainter* painter(context ? context->platformContext() : 0);
42 //Q_ASSERT(painter);
43
44 //QPainterPath* path(context ? context->currentPath() : 0);
45 //Q_ASSERT(path);
46 QPainterPath* path(painterPath);
47
48 //RenderStyle* renderStyle = object->style();
49
50 QMatrix mat = painter->matrix();
51
52 double cx, fx, cy, fy, r;
53 if (boundingBoxMode()) {
54 QRectF bbox = path->boundingRect();
55 cx = double(bbox.left()) + (double(gradientCenter().x() / 100.0) * double(bbox.width()));
56 cy = double(bbox.top()) + (double(gradientCenter().y() / 100.0) * double(bbox.height()));
57 fx = double(bbox.left()) + (double(gradientFocal().x() / 100.0) * double(bbox.width())) - cx;
58 fy = double(bbox.top()) + (double(gradientFocal().y() / 100.0) * double(bbox.height())) - cy;
59 r = double(gradientRadius() / 100.0) * (sqrt(pow(bbox.width(), 2) + pow(bbox.height(), 2)));
60
61 float width = bbox.width();
62 float height = bbox.height();
63
64 int diff = int(width - height); // allow slight tolerance
65 if (!(diff > -2 && diff < 2)) {
66 // make elliptical or circular depending on bbox aspect ratio
67 float ratioX = (width / height);
68 float ratioY = (height / width);
69 mat.scale((width > height) ? 1 : ratioX, (width > height) ? ratioY : 1);
70 }
71 } else {
72 cx = gradientCenter().x();
73 cy = gradientCenter().y();
74
75 fx = gradientFocal().x();
76 fy = gradientFocal().y();
77
78 fx -= cx;
79 fy -= cy;
80
81 r = gradientRadius();
82 }
83
84 if (sqrt(fx * fx + fy * fy) > r) {
85 // Spec: If (fx, fy) lies outside the circle defined by (cx, cy) and r, set (fx, fy)
86 // to the point of intersection of the line through (fx, fy) and the circle.
87 double angle = atan2(fy, fx);
88 fx = int(cos(angle) * r) - 1;
89 fy = int(sin(angle) * r) - 1;
90 }
91
92 kDebug() << "cx:" << cx << "cy:" << cy << "radius:" << gradientRadius() << "fx:" << fx + cx << "fy:" << fy + cy << endl;
93 QRadialGradient gradient(QPointF(cx, cy), gradientRadius(), QPointF(fx + cx, fy + cy));
94
95 return gradient;
96}
97
98} // namespace WebCore
99
100#endif
101
102// vim:ts=4:noet
SVGPaintServerRadialGradient.h
kDebug
#define kDebug
WebCore
Definition: CSSHelper.h:7
This file is part of the KDE documentation.
Documentation copyright © 1996-2023 The KDE developers.
Generated on Mon Feb 20 2023 00:00:00 by doxygen 1.9.6 written by Dimitri van Heesch, © 1997-2006

KDE's Doxygen guidelines are available online.

KHTML

Skip menu "KHTML"
  • Main Page
  • Namespace List
  • Namespace Members
  • Alphabetical List
  • Class List
  • Class Hierarchy
  • Class Members
  • File List
  • File Members
  • Related Pages

kdelibs-4.14.38 API Reference

Skip menu "kdelibs-4.14.38 API Reference"
  • DNSSD
  • Interfaces
  •   KHexEdit
  •   KMediaPlayer
  •   KSpeech
  •   KTextEditor
  • kconf_update
  • KDE3Support
  •   KUnitTest
  • KDECore
  • KDED
  • KDEsu
  • KDEUI
  • KDEWebKit
  • KDocTools
  • KFile
  • KHTML
  • KImgIO
  • KInit
  • kio
  • KIOSlave
  • KJS
  •   KJS-API
  •   WTF
  • kjsembed
  • KNewStuff
  • KParts
  • KPty
  • Kross
  • KUnitConversion
  • KUtils
  • Nepomuk
  • Plasma
  • Solid
  • Sonnet
  • ThreadWeaver
Report problems with this website to our bug tracking system.
Contact the specific authors with questions and comments about the page contents.

KDE® and the K Desktop Environment® logo are registered trademarks of KDE e.V. | Legal