Long live Qt!

1 files changed, 412 insertions, 0 deletions

diff --git a/src/gui/painting/qoutlinemapper.cpp b/src/gui/painting/qoutlinemapper.cpp
new file mode 100644
index 0000000..4f90e71
--- /dev/null
+++ b/src/gui/painting/qoutlinemapper.cpp
@@ -0,0 +1,412 @@
+/****************************************************************************
+**
+** 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qoutlinemapper_p.h"
+
+#include "qmath.h"
+
+#include <stdlib.h>
+
+QT_BEGIN_NAMESPACE
+
+static const qreal aliasedCoordinateDelta = 0.5 - 0.015625;
+
+#define qreal_to_fixed_26_6(f) (int(f * 64))
+
+
+
+
+static const QRectF boundingRect(const QPointF *points, int pointCount)
+{
+    const QPointF *e = points;
+    const QPointF *last = points + pointCount;
+    qreal minx, maxx, miny, maxy;
+    minx = maxx = e->x();
+    miny = maxy = e->y();
+    while (++e < last) {
+        if (e->x() < minx)
+            minx = e->x();
+        else if (e->x() > maxx)
+            maxx = e->x();
+        if (e->y() < miny)
+            miny = e->y();
+        else if (e->y() > maxy)
+            maxy = e->y();
+    }
+    return QRectF(QPointF(minx, miny), QPointF(maxx, maxy));
+}
+
+
+QT_FT_Outline *QOutlineMapper::convertPath(const QPainterPath &path)
+{
+    Q_ASSERT(!path.isEmpty());
+    int elmCount = path.elementCount();
+#ifdef QT_DEBUG_CONVERT
+    printf("QOutlineMapper::convertPath(), size=%d\n", elmCount);
+#endif
+    beginOutline(path.fillRule());
+
+    for (int index=0; index<elmCount; ++index) {
+        const QPainterPath::Element &elm = path.elementAt(index);
+
+        switch (elm.type) {
+
+        case QPainterPath::MoveToElement:
+            if (index == elmCount - 1)
+                continue;
+            moveTo(elm);
+            break;
+
+        case QPainterPath::LineToElement:
+            lineTo(elm);
+            break;
+
+        case QPainterPath::CurveToElement:
+            curveTo(elm, path.elementAt(index + 1), path.elementAt(index + 2));
+            index += 2;
+            break;
+
+        default:
+            break; // This will never hit..
+        }
+    }
+
+    endOutline();
+    return outline();
+}
+
+QT_FT_Outline *QOutlineMapper::convertPath(const QVectorPath &path)
+{
+    int count = path.elementCount();
+
+#ifdef QT_DEBUG_CONVERT
+    printf("QOutlineMapper::convertPath(VP), size=%d\n", count);
+#endif
+    beginOutline(path.hasWindingFill() ? Qt::WindingFill : Qt::OddEvenFill);
+
+    if (path.elements()) {
+        // TODO: if we do closing of subpaths in convertElements instead we
+        // could avoid this loop
+        const QPainterPath::ElementType *elements = path.elements();
+        const QPointF *points = reinterpret_cast<const QPointF *>(path.points());
+
+        for (int index = 0; index < count; ++index) {
+            switch (elements[index]) {
+                case QPainterPath::MoveToElement:
+                    if (index == count - 1)
+                        continue;
+                    moveTo(points[index]);
+                    break;
+
+                case QPainterPath::LineToElement:
+                    lineTo(points[index]);
+                    break;
+
+                case QPainterPath::CurveToElement:
+                    curveTo(points[index], points[index+1], points[index+2]);
+                    index += 2;
+                    break;
+
+                default:
+                    break; // This will never hit..
+            }
+        }
+
+    } else {
+        // ### We can kill this copying and just use the buffer straight...
+
+        m_elements.resize(count);
+        memcpy(m_elements.data(), path.points(), count* sizeof(QPointF));
+
+        m_element_types.resize(0);
+    }
+
+    endOutline();
+    return outline();
+}
+
+
+void QOutlineMapper::endOutline()
+{
+    closeSubpath();
+
+    int element_count = m_elements.size();
+
+    if (element_count == 0) {
+        memset(&m_outline, 0, sizeof(m_outline));
+        return;
+    }
+
+    QPointF *elements;
+
+    // Transform the outline
+    if (m_txop == QTransform::TxNone) {
+        elements = m_elements.data();
+    } else {
+        if (m_txop == QTransform::TxTranslate) {
+            for (int i=0; i<m_elements.size(); ++i) {
+                const QPointF &e = m_elements.at(i);
+                m_elements_dev << QPointF(e.x() + m_dx, e.y() + m_dy);
+            }
+        } else if (m_txop == QTransform::TxScale) {
+            for (int i=0; i<m_elements.size(); ++i) {
+                const QPointF &e = m_elements.at(i);
+                m_elements_dev << QPointF(m_m11 * e.x() + m_dx, m_m22 * e.y() + m_dy);
+            }
+        } else if (m_txop < QTransform::TxProject) {
+            for (int i=0; i<m_elements.size(); ++i) {
+                const QPointF &e = m_elements.at(i);
+                m_elements_dev << QPointF(m_m11 * e.x() + m_m21 * e.y() + m_dx,
+                                          m_m22 * e.y() + m_m12 * e.x() + m_dy);
+            }
+        } else {
+            // ## TODO: this case needs to be plain code polygonal paths
+            QPainterPath path;
+            if (m_element_types.isEmpty()) {
+                if (!m_elements.isEmpty())
+                    path.moveTo(m_elements.at(0));
+                for (int i=1; i<m_elements.size(); ++i)
+                    path.lineTo(m_elements.at(i));
+            } else {
+                for (int i=0; i<m_elements.size(); ++i) {
+                    switch (m_element_types.at(i)) {
+                    case QPainterPath::MoveToElement:
+                        path.moveTo(m_elements.at(i));
+                        break;
+                    case QPainterPath::LineToElement:
+                        path.lineTo(m_elements.at(i));
+                        break;
+                    case QPainterPath::CurveToElement:
+                        path.cubicTo(m_elements.at(i), m_elements.at(i+1), m_elements.at(i+2));
+                        i += 2;
+                        break;
+                    default:
+                        Q_ASSERT(false);
+                        break;
+                    }
+                }
+            }
+            path = QTransform(m_m11, m_m12, m_m13, m_m21, m_m22, m_m23, m_dx, m_dy, m_m33).map(path);
+            uint old_txop = m_txop;
+            m_txop = QTransform::TxNone;
+            if (path.isEmpty())
+                m_valid = false;
+            else
+                convertPath(path);
+            m_txop = old_txop;
+            return;
+        }
+        elements = m_elements_dev.data();
+    }
+
+    if (m_round_coords) {
+        // round coordinates to match outlines drawn with drawLine_midpoint_i
+        for (int i = 0; i < m_elements.size(); ++i)
+            elements[i] = QPointF(qFloor(elements[i].x() + aliasedCoordinateDelta),
+                                  qFloor(elements[i].y() + aliasedCoordinateDelta));
+    }
+
+    controlPointRect = boundingRect(elements, element_count);
+
+#ifdef QT_DEBUG_CONVERT
+    printf(" - control point rect (%.2f, %.2f) %.2f x %.2f\n",
+           controlPointRect.x(), controlPointRect.y(),
+           controlPointRect.width(), controlPointRect.height());
+#endif
+
+
+    // Check for out of dev bounds...
+    const bool do_clip = (controlPointRect.left() < -QT_RASTER_COORD_LIMIT
+                          || controlPointRect.right() > QT_RASTER_COORD_LIMIT
+                          || controlPointRect.top() < -QT_RASTER_COORD_LIMIT
+                          || controlPointRect.bottom() > QT_RASTER_COORD_LIMIT);
+
+    if (do_clip) {
+        clipElements(elements, elementTypes(), element_count);
+    } else {
+        convertElements(elements, elementTypes(), element_count);
+    }
+}
+
+void QOutlineMapper::convertElements(const QPointF *elements,
+                                       const QPainterPath::ElementType *types,
+                                       int element_count)
+{
+
+    if (types) {
+        // Translate into FT coords
+        const QPointF *e = elements;
+        for (int i=0; i<element_count; ++i) {
+            switch (*types) {
+            case QPainterPath::MoveToElement:
+                {
+                    QT_FT_Vector pt_fixed = { qreal_to_fixed_26_6(e->x()),
+                                              qreal_to_fixed_26_6(e->y()) };
+                    if (i != 0)
+                        m_contours << m_points.size() - 1;
+                    m_points << pt_fixed;
+                    m_tags <<  QT_FT_CURVE_TAG_ON;
+                }
+                break;
+
+            case QPainterPath::LineToElement:
+                {
+                    QT_FT_Vector pt_fixed = { qreal_to_fixed_26_6(e->x()),
+                                              qreal_to_fixed_26_6(e->y()) };
+                    m_points << pt_fixed;
+                    m_tags << QT_FT_CURVE_TAG_ON;
+                }
+                break;
+
+            case QPainterPath::CurveToElement:
+                {
+                    QT_FT_Vector cp1_fixed = { qreal_to_fixed_26_6(e->x()),
+                                               qreal_to_fixed_26_6(e->y()) };
+                    ++e;
+                    QT_FT_Vector cp2_fixed = { qreal_to_fixed_26_6((e)->x()),
+                                               qreal_to_fixed_26_6((e)->y()) };
+                    ++e;
+                    QT_FT_Vector ep_fixed = { qreal_to_fixed_26_6((e)->x()),
+                                              qreal_to_fixed_26_6((e)->y()) };
+
+                    m_points << cp1_fixed << cp2_fixed << ep_fixed;
+                    m_tags << QT_FT_CURVE_TAG_CUBIC
+                           << QT_FT_CURVE_TAG_CUBIC
+                           << QT_FT_CURVE_TAG_ON;
+
+                    types += 2;
+                    i += 2;
+                }
+                break;
+            default:
+                break;
+            }
+            ++types;
+            ++e;
+        }
+    } else {
+        // Plain polygon...
+        const QPointF *last = elements + element_count;
+        const QPointF *e = elements;
+        while (e < last) {
+            QT_FT_Vector pt_fixed = { qreal_to_fixed_26_6(e->x()),
+                                      qreal_to_fixed_26_6(e->y()) };
+            m_points << pt_fixed;
+            m_tags << QT_FT_CURVE_TAG_ON;
+            ++e;
+        }
+    }
+
+    // close the very last subpath
+    m_contours << m_points.size() - 1;
+
+    m_outline.n_contours = m_contours.size();
+    m_outline.n_points = m_points.size();
+
+    m_outline.points = m_points.data();
+    m_outline.tags = m_tags.data();
+    m_outline.contours = m_contours.data();
+
+#ifdef QT_DEBUG_CONVERT
+    printf("QOutlineMapper::endOutline\n");
+
+    printf(" - contours: %d\n", m_outline.n_contours);
+    for (int i=0; i<m_outline.n_contours; ++i) {
+        printf("   - %d\n", m_outline.contours[i]);
+    }
+
+    printf(" - points: %d\n", m_outline.n_points);
+    for (int i=0; i<m_outline.n_points; ++i) {
+        printf("   - %d -- %.2f, %.2f, (%d, %d)\n", i,
+               (double) (m_outline.points[i].x / 64.0),
+               (double) (m_outline.points[i].y / 64.0),
+               (int) m_outline.points[i].x, (int) m_outline.points[i].y);
+    }
+#endif
+}
+
+void QOutlineMapper::clipElements(const QPointF *elements,
+                                    const QPainterPath::ElementType *types,
+                                    int element_count)
+{
+    // We could save a bit of time by actually implementing them fully
+    // instead of going through convenience functionallity, but since
+    // this part of code hardly every used, it shouldn't matter.
+
+    QPainterPath path;
+    if (types) {
+        for (int i=0; i<element_count; ++i) {
+            switch (types[i]) {
+            case QPainterPath::MoveToElement:
+                path.moveTo(elements[i]);
+                break;
+
+            case QPainterPath::LineToElement:
+                path.lineTo(elements[i]);
+                break;
+
+            case QPainterPath::CurveToElement:
+                path.cubicTo(elements[i], elements[i+1], elements[i+2]);
+                i += 2;
+                break;
+            default:
+                break;
+            }
+        }
+    } else {
+        path.moveTo(elements[0]);
+        for (int i=1; i<element_count; ++i)
+            path.lineTo(elements[i]);
+    }
+
+    QPainterPath clipPath;
+    clipPath.addRect(m_clip_rect);
+    QPainterPath clippedPath = path.intersected(clipPath);
+    uint old_txop = m_txop;
+    m_txop = QTransform::TxNone;
+    if (clippedPath.isEmpty())
+        m_valid = false;
+    else
+        convertPath(clippedPath);
+    m_txop = old_txop;
+}
+
+QT_END_NAMESPACE