| /**************************************************************************** |
| ** |
| ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). |
| ** All rights reserved. |
| ** Contact: Nokia Corporation (qt-info@nokia.com) |
| ** |
| ** This file is part of the QtOpenGL module of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** GNU Lesser General Public License Usage |
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| ** rights. These rights are described in the Nokia Qt LGPL Exception |
| ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU General |
| ** Public License version 3.0 as published by the Free Software Foundation |
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| ** file. Please review the following information to ensure the GNU General |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| #ifndef QTRIANGULATINGSTROKER_P_H |
| #define QTRIANGULATINGSTROKER_P_H |
| |
| #include <private/qdatabuffer_p.h> |
| #include <qvarlengtharray.h> |
| #include <private/qvectorpath_p.h> |
| #include <private/qbezier_p.h> |
| #include <private/qnumeric_p.h> |
| #include <private/qmath_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QTriangulatingStroker |
| { |
| public: |
| QTriangulatingStroker() : m_vertices(0) {} |
| void process(const QVectorPath &path, const QPen &pen, const QRectF &clip); |
| |
| inline int vertexCount() const { return m_vertices.size(); } |
| inline const float *vertices() const { return m_vertices.data(); } |
| |
| inline void setInvScale(qreal invScale) { m_inv_scale = invScale; } |
| |
| private: |
| inline void emitLineSegment(float x, float y, float nx, float ny); |
| void moveTo(const qreal *pts); |
| inline void lineTo(const qreal *pts); |
| void cubicTo(const qreal *pts); |
| void join(const qreal *pts); |
| inline void normalVector(float x1, float y1, float x2, float y2, float *nx, float *ny); |
| void endCap(const qreal *pts); |
| void arcPoints(float cx, float cy, float fromX, float fromY, float toX, float toY, QVarLengthArray<float> &points); |
| void endCapOrJoinClosed(const qreal *start, const qreal *cur, bool implicitClose, bool endsAtStart); |
| |
| |
| QDataBuffer<float> m_vertices; |
| |
| float m_cx, m_cy; // current points |
| float m_nvx, m_nvy; // normal vector... |
| float m_width; |
| qreal m_miter_limit; |
| |
| int m_roundness; // Number of line segments in a round join |
| qreal m_sin_theta; // sin(m_roundness / 360); |
| qreal m_cos_theta; // cos(m_roundness / 360); |
| qreal m_inv_scale; |
| float m_curvyness_mul; |
| float m_curvyness_add; |
| |
| Qt::PenJoinStyle m_join_style; |
| Qt::PenCapStyle m_cap_style; |
| }; |
| |
| class QDashedStrokeProcessor |
| { |
| public: |
| QDashedStrokeProcessor(); |
| |
| void process(const QVectorPath &path, const QPen &pen, const QRectF &clip); |
| |
| inline void addElement(QPainterPath::ElementType type, qreal x, qreal y) { |
| m_points.add(x); |
| m_points.add(y); |
| m_types.add(type); |
| } |
| |
| inline int elementCount() const { return m_types.size(); } |
| inline qreal *points() const { return m_points.data(); } |
| inline QPainterPath::ElementType *elementTypes() const { return m_types.data(); } |
| |
| inline void setInvScale(qreal invScale) { m_inv_scale = invScale; } |
| |
| private: |
| QDataBuffer<qreal> m_points; |
| QDataBuffer<QPainterPath::ElementType> m_types; |
| QDashStroker m_dash_stroker; |
| qreal m_inv_scale; |
| }; |
| |
| inline void QTriangulatingStroker::normalVector(float x1, float y1, float x2, float y2, |
| float *nx, float *ny) |
| { |
| float dx = x2 - x1; |
| float dy = y2 - y1; |
| |
| float pw; |
| |
| if (dx == 0) |
| pw = m_width / qAbs(dy); |
| else if (dy == 0) |
| pw = m_width / qAbs(dx); |
| else |
| pw = m_width / sqrt(dx*dx + dy*dy); |
| |
| *nx = -dy * pw; |
| *ny = dx * pw; |
| } |
| |
| inline void QTriangulatingStroker::emitLineSegment(float x, float y, float vx, float vy) |
| { |
| m_vertices.add(x + vx); |
| m_vertices.add(y + vy); |
| m_vertices.add(x - vx); |
| m_vertices.add(y - vy); |
| } |
| |
| void QTriangulatingStroker::lineTo(const qreal *pts) |
| { |
| emitLineSegment(pts[0], pts[1], m_nvx, m_nvy); |
| m_cx = pts[0]; |
| m_cy = pts[1]; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif |