/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtGui module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** No Commercial Usage ** This file contains pre-release code and may not be distributed. ** You may use this file in accordance with the terms and conditions ** contained in the Technology Preview License Agreement accompanying ** this package. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** ** ** ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #ifndef QOUTLINEMAPPER_P_H #define QOUTLINEMAPPER_P_H // // W A R N I N G // ------------- // // This file is not part of the Qt API. It exists purely as an // implementation detail. This header file may change from version to // version without notice, or even be removed. // // We mean it. // #include #include #include #define QT_FT_BEGIN_HEADER #define QT_FT_END_HEADER #include #include #include "qpaintengineex_p.h" QT_BEGIN_NAMESPACE // This limitations comes from qgrayraster.c. Any higher and // rasterization of shapes will produce incorrect results. const int QT_RASTER_COORD_LIMIT = 32767; //#define QT_DEBUG_CONVERT /******************************************************************************** * class QOutlineMapper * * Used to map between QPainterPath and the QT_FT_Outline structure used by the * freetype scanconvertor. * * The outline mapper uses a path iterator to get points from the path, * so that it is possible to transform the points as they are converted. The * callback can be a noop, translate or full-fledged xform. (Tests indicated * that using a C callback was low cost). */ class QOutlineMapper { public: QOutlineMapper() : m_element_types(0), m_elements(0), m_elements_dev(0), m_points(0), m_tags(0), m_contours(0), m_polygon_dev(0), m_in_clip_elements(false) { } /*! Sets up the matrix to be used for conversion. This also sets up the qt_path_iterator function that is used as a callback to get points. */ void setMatrix(const QTransform &m) { m_m11 = m.m11(); m_m12 = m.m12(); m_m13 = m.m13(); m_m21 = m.m21(); m_m22 = m.m22(); m_m23 = m.m23(); m_m33 = m.m33(); m_dx = m.dx(); m_dy = m.dy(); m_txop = m.type(); } void beginOutline(Qt::FillRule fillRule) { #ifdef QT_DEBUG_CONVERT printf("QOutlineMapper::beginOutline rule=%d\n", fillRule); #endif m_valid = true; m_elements.reset(); m_elements_dev.reset(); m_element_types.reset(); m_points.reset(); m_tags.reset(); m_contours.reset(); m_outline.flags = fillRule == Qt::WindingFill ? QT_FT_OUTLINE_NONE : QT_FT_OUTLINE_EVEN_ODD_FILL; m_subpath_start = 0; } void endOutline(); void clipElements(const QPointF *points, const QPainterPath::ElementType *types, int count); void convertElements(const QPointF *points, const QPainterPath::ElementType *types, int count); inline void moveTo(const QPointF &pt) { #ifdef QT_DEBUG_CONVERT printf("QOutlineMapper::moveTo() (%f, %f)\n", pt.x(), pt.y()); #endif closeSubpath(); m_subpath_start = m_elements.size(); m_elements << pt; m_element_types << QPainterPath::MoveToElement; } inline void lineTo(const QPointF &pt) { #ifdef QT_DEBUG_CONVERT printf("QOutlineMapper::lineTo() (%f, %f)\n", pt.x(), pt.y()); #endif m_elements.add(pt); m_element_types << QPainterPath::LineToElement; } inline void curveTo(const QPointF &cp1, const QPointF &cp2, const QPointF &ep) { #ifdef QT_DEBUG_CONVERT printf("QOutlineMapper::curveTo() (%f, %f)\n", ep.x(), ep.y()); #endif m_elements << cp1 << cp2 << ep; m_element_types << QPainterPath::CurveToElement << QPainterPath::CurveToDataElement << QPainterPath::CurveToDataElement; } inline void closeSubpath() { int element_count = m_elements.size(); if (element_count > 0) { if (m_elements.at(element_count-1) != m_elements.at(m_subpath_start)) { #ifdef QT_DEBUG_CONVERT printf(" - implicitly closing\n"); #endif // Put the object on the stack to avoid the odd case where // lineTo reallocs the databuffer and the QPointF & will // be invalidated. QPointF pt = m_elements.at(m_subpath_start); // only do lineTo if we have element_type array... if (m_element_types.size()) lineTo(pt); else m_elements << pt; } } } QT_FT_Outline *outline() { if (m_valid) return &m_outline; return 0; } QT_FT_Outline *convertPath(const QPainterPath &path); QT_FT_Outline *convertPath(const QVectorPath &path); inline QPainterPath::ElementType *elementTypes() const { return m_element_types.size() == 0 ? 0 : m_element_types.data(); } public: QDataBuffer m_element_types; QDataBuffer m_elements; QDataBuffer m_elements_dev; QDataBuffer m_points; QDataBuffer m_tags; QDataBuffer m_contours; QRect m_clip_rect; QDataBuffer m_polygon_dev; QRectF controlPointRect; // only valid after endOutline() QT_FT_Outline m_outline; uint m_txop; int m_subpath_start; // Matrix qreal m_m11; qreal m_m12; qreal m_m13; qreal m_m21; qreal m_m22; qreal m_m23; qreal m_m33; qreal m_dx; qreal m_dy; bool m_valid; bool m_in_clip_elements; }; QT_END_NAMESPACE #endif // QOUTLINEMAPPER_P_H