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-rw-r--r--src/gui/painting/qoutlinemapper.cpp412
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diff --git a/src/gui/painting/qoutlinemapper.cpp b/src/gui/painting/qoutlinemapper.cpp
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+/****************************************************************************
+**
+** 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
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