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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 241 insertions, 0 deletions

diff --git a/src/gui/painting/qoutlinemapper_p.h b/src/gui/painting/qoutlinemapper_p.h
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index 0000000000..4dd28ac172
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+++ b/src/gui/painting/qoutlinemapper_p.h
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+/****************************************************************************
+**
+** 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 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 <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_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<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;
+    bool m_in_clip_elements;
+};
+
+QT_END_NAMESPACE
+
+#endif // QOUTLINEMAPPER_P_H