diff options
Diffstat (limited to 'src/gui/painting/qstroker.cpp')
| -rw-r--r-- | src/gui/painting/qstroker.cpp | 102 |
1 files changed, 39 insertions, 63 deletions
diff --git a/src/gui/painting/qstroker.cpp b/src/gui/painting/qstroker.cpp index cd1a49150b..79799ca2ec 100644 --- a/src/gui/painting/qstroker.cpp +++ b/src/gui/painting/qstroker.cpp @@ -1,41 +1,5 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtGui module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only #include "private/qstroker_p.h" #include "private/qbezier_p.h" @@ -295,7 +259,7 @@ void QStrokerOps::strokePath(const QPainterPath &path, void *customData, const Q /*! Convenience function for stroking a polygon of the \a pointCount first points in \a points. If \a implicit_close is set to true a - line is implictly drawn between the first and last point in the + line is implicitly drawn between the first and last point in the polygon. Typically true for polygons and false for polylines. The \a matrix is used to transform the points before they enter the @@ -1133,7 +1097,9 @@ void QDashStroker::processCurrentSubpath() qreal doffset = m_dashOffset * m_stroke_width; // make sure doffset is in range [0..sumLength) - doffset -= qFloor(doffset * invSumLength) * sumLength; + doffset = std::fmod(doffset, sumLength); + if (doffset < 0) + doffset += sumLength; while (doffset >= dashes[idash]) { doffset -= dashes[idash]; @@ -1179,32 +1145,42 @@ void QDashStroker::processCurrentSubpath() bool done = pos >= estop; - if (clipping) { - // Check if the entire line can be clipped away. - if (!lineIntersectsRect(prev, e, clip_tl, clip_br)) { - // Cut away full dash sequences. - elen -= qFloor(elen * invSumLength) * sumLength; - // Update dash offset. - while (!done) { - qreal dpos = pos + dashes[idash] - doffset - estart; - - Q_ASSERT(dpos >= 0); - - if (dpos > elen) { // dash extends this line - doffset = dashes[idash] - (dpos - elen); // subtract the part already used - pos = estop; // move pos to next path element - done = true; - } else { // Dash is on this line - pos = dpos + estart; - done = pos >= estop; - if (++idash >= dashCount) - idash = 0; - doffset = 0; // full segment so no offset on next. - } + // Check if the entire line should be clipped away or simplified + bool clipIt = clipping && !lineIntersectsRect(prev, e, clip_tl, clip_br); + bool skipDashing = elen * invSumLength > repetitionLimit(); + int maxDashes = dashCount; + if (skipDashing || clipIt) { + // Cut away full dash sequences. + elen -= std::floor(elen * invSumLength) * sumLength; + // Update dash offset. + while (!done) { + qreal dpos = pos + dashes[idash] - doffset - estart; + + Q_ASSERT(dpos >= 0); + + if (dpos > elen) { // dash extends this line + doffset = dashes[idash] - (dpos - elen); // subtract the part already used + pos = estop; // move pos to next path element + done = true; + } else { // Dash is on this line + pos = --maxDashes > 0 ? dpos + estart : estop; + done = pos >= estop; + if (++idash >= dashCount) + idash = 0; + doffset = 0; // full segment so no offset on next. } + } + if (clipIt) { hasMoveTo = false; - move_to_pos = e; + } else { + // skip costly dashing, just draw solid line + if (!hasMoveTo) { + emitMoveTo(move_to_pos.x, move_to_pos.y); + hasMoveTo = true; + } + emitLineTo(e.x, e.y); } + move_to_pos = e; } // Dash away... |