1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtGui module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QCOSMETICSTROKER_P_H 41 #define QCOSMETICSTROKER_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists purely as an 48 // implementation detail. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtGui/private/qtguiglobal_p.h> 55 #include <private/qdrawhelper_p.h> 56 #include <private/qvectorpath_p.h> 57 #include <private/qpaintengine_raster_p.h> 58 #include <qpen.h> 59 60 QT_BEGIN_NAMESPACE 61 62 63 class QCosmeticStroker; 64 65 66 typedef bool (*StrokeLine)(QCosmeticStroker *stroker, qreal x1, qreal y1, qreal x2, qreal y2, int caps); 67 68 class QCosmeticStroker 69 { 70 public: 71 struct Point { 72 int x; 73 int y; 74 }; 75 struct PointF { 76 qreal x; 77 qreal y; 78 }; 79 80 enum Caps { 81 NoCaps = 0, 82 CapBegin = 0x1, 83 CapEnd = 0x2 84 }; 85 86 // used to avoid drop outs or duplicated points 87 enum Direction { 88 NoDirection = 0, 89 TopToBottom = 0x1, 90 BottomToTop = 0x2, 91 LeftToRight = 0x4, 92 RightToLeft = 0x8, 93 VerticalMask = 0x3, 94 HorizontalMask = 0xc 95 }; 96 QCosmeticStroker(QRasterPaintEngineState * s,const QRect & dr,const QRect & dr_unclipped)97 QCosmeticStroker(QRasterPaintEngineState *s, const QRect &dr, const QRect &dr_unclipped) 98 : state(s), 99 deviceRect(dr_unclipped), 100 clip(dr), 101 pattern(nullptr), 102 reversePattern(nullptr), 103 patternSize(0), 104 patternLength(0), 105 patternOffset(0), 106 legacyRounding(false), 107 current_span(0), 108 lastDir(NoDirection), 109 lastAxisAligned(false) 110 { setup(); } 111 ~QCosmeticStroker()112 ~QCosmeticStroker() { free(pattern); free(reversePattern); } 113 setLegacyRoundingEnabled(bool legacyRoundingEnabled)114 void setLegacyRoundingEnabled(bool legacyRoundingEnabled) { legacyRounding = legacyRoundingEnabled; } 115 116 void drawLine(const QPointF &p1, const QPointF &p2); 117 void drawPath(const QVectorPath &path); 118 void drawPoints(const QPoint *points, int num); 119 void drawPoints(const QPointF *points, int num); 120 121 122 QRasterPaintEngineState *state; 123 QRect deviceRect; 124 QRect clip; 125 // clip bounds in real 126 qreal xmin, xmax; 127 qreal ymin, ymax; 128 129 StrokeLine stroke; 130 bool drawCaps; 131 132 int *pattern; 133 int *reversePattern; 134 int patternSize; 135 int patternLength; 136 int patternOffset; 137 138 bool legacyRounding; 139 140 enum { NSPANS = 255 }; 141 QT_FT_Span spans[NSPANS]; 142 int current_span; 143 ProcessSpans blend; 144 145 int opacity; 146 147 uint color; 148 uint *pixels; 149 int ppl; 150 151 Direction lastDir; 152 Point lastPixel; 153 bool lastAxisAligned; 154 155 private: 156 void setup(); 157 158 void renderCubic(const QPointF &p1, const QPointF &p2, const QPointF &p3, const QPointF &p4, int caps); 159 void renderCubicSubdivision(PointF *points, int level, int caps); 160 // used for closed subpaths 161 void calculateLastPoint(qreal rx1, qreal ry1, qreal rx2, qreal ry2); 162 163 public: 164 bool clipLine(qreal &x1, qreal &y1, qreal &x2, qreal &y2); 165 }; 166 167 QT_END_NAMESPACE 168 169 #endif // QCOSMETICLINE_H 170