diff options
author | Lars Knoll <lars.knoll@nokia.com> | 2009-03-23 09:18:55 (GMT) |
---|---|---|
committer | Simon Hausmann <simon.hausmann@nokia.com> | 2009-03-23 09:18:55 (GMT) |
commit | e5fcad302d86d316390c6b0f62759a067313e8a9 (patch) | |
tree | c2afbf6f1066b6ce261f14341cf6d310e5595bc1 /src/gui/painting/qoutlinemapper_p.h | |
download | Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.zip Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.tar.gz Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.tar.bz2 |
Long live Qt 4.5!
Diffstat (limited to 'src/gui/painting/qoutlinemapper_p.h')
-rw-r--r-- | src/gui/painting/qoutlinemapper_p.h | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/src/gui/painting/qoutlinemapper_p.h b/src/gui/painting/qoutlinemapper_p.h new file mode 100644 index 0000000..129169e --- /dev/null +++ b/src/gui/painting/qoutlinemapper_p.h @@ -0,0 +1,238 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, 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 and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@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 <QtCore/qrect.h> + +#include <QtGui/qtransform.h> +#include <QtGui/qpainterpath.h> + +#define QT_FT_BEGIN_HEADER +#define QT_FT_END_HEADER + +#include <private/qrasterdefs_p.h> +#include <private/qdatabuffer_p.h> +#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_round_coords(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); + + void setCoordinateRounding(bool coordinateRounding) { m_round_coords = coordinateRounding; } + + inline QPainterPath::ElementType *elementTypes() const { return m_element_types.size() == 0 ? 0 : m_element_types.data(); } + +public: + QDataBuffer<QPainterPath::ElementType> m_element_types; + QDataBuffer<QPointF> m_elements; + QDataBuffer<QPointF> m_elements_dev; + QDataBuffer<QT_FT_Vector> m_points; + QDataBuffer<char> m_tags; + QDataBuffer<int> m_contours; + + QRect m_clip_rect; + QDataBuffer<QPointF> 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; + +private: + bool m_round_coords; +}; + +QT_END_NAMESPACE + +#endif // QOUTLINEMAPPER_P_H |