qsvgstyle.cpp

奇趣公司比较新的qt/emd版本

/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the QtSVG module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 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 GNU
** General Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at [e-mail].
**
** In addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.0, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
**
** In addition, as a special exception, Trolltech, as the sole copyright
** holder for Qt Designer, grants users of the Qt/Eclipse Integration
** plug-in the right for the Qt/Eclipse Integration to link to
** functionality provided by Qt Designer and its related libraries.
**
** Trolltech reserves all rights not expressly granted herein.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qsvgstyle_p.h"
#include "qsvgfont_p.h"
#include "qsvggraphics_p.h"
#include "qsvgnode_p.h"
#include "qsvgtinydocument_p.h"

#include "qpainter.h"
#include "qpair.h"
#include "qcolor.h"
#include "qdebug.h"

#include <math.h>

QSvgStyleProperty::~QSvgStyleProperty()
{
}

QSvgQualityStyle::QSvgQualityStyle(int color)
    : m_colorRendering(color)
{

}
void QSvgQualityStyle::apply(QPainter *, const QRectF &, QSvgNode *)
{

}
void QSvgQualityStyle::revert(QPainter *)
{

}

QSvgFillStyle::QSvgFillStyle(const QBrush &brush, bool fromColor)
    : m_fill(brush), m_fromColor(fromColor), m_fillRuleSet(false)
{
}

void QSvgFillStyle::setFillRule(Qt::FillRule f)
{
    m_fillRuleSet = true;
    m_fillRule = f;
}

static void recursivelySetFill(QSvgNode *node, Qt::FillRule f)
{
    if (node->type() == QSvgNode::PATH) {
        QSvgPath *path = static_cast<QSvgPath*>(node);
        path->qpath()->setFillRule(f);
    } else if (node->type() == QSvgNode::G) {
        QList<QSvgNode*> renderers = static_cast<QSvgG*>(node)->renderers();
        foreach(QSvgNode *n, renderers) {
            recursivelySetFill(n, f);
        }
    }
}
void QSvgFillStyle::apply(QPainter *p, const QRectF &, QSvgNode *node)
{
    m_oldFill = p->brush();

    if (m_fillRuleSet) {
        recursivelySetFill(node, m_fillRule);
        m_fillRuleSet = false;//set it only on the first run
    }
    p->setBrush(m_fill);
}

void QSvgFillStyle::revert(QPainter *p)
{
    p->setBrush(m_oldFill);
}

QSvgViewportFillStyle::QSvgViewportFillStyle(const QBrush &brush)
    : m_viewportFill(brush)
{
}

void QSvgViewportFillStyle::apply(QPainter *p, const QRectF &, QSvgNode *)
{
    m_oldFill = p->brush();
    p->setBrush(m_viewportFill);
}

void QSvgViewportFillStyle::revert(QPainter *p)
{
    p->setBrush(m_oldFill);
}

QSvgFontStyle::QSvgFontStyle(QSvgFont *font, QSvgTinyDocument *doc)
    : m_font(font), m_pointSize(24), m_doc(doc)
{
}

QSvgFontStyle::QSvgFontStyle(const QFont &font, QSvgTinyDocument *doc)
    : m_font(0), m_pointSize(24), m_doc(doc), m_qfont(font)
{
}


void QSvgFontStyle::setPointSize(qreal size)
{
    m_pointSize = size;
}

qreal QSvgFontStyle::pointSize() const
{
    return m_pointSize;
}

void QSvgFontStyle::apply(QPainter *p, const QRectF &, QSvgNode *)
{
    if (!m_font) {
        m_oldFont = p->font();
        p->setFont(m_qfont);
    }
}

void QSvgFontStyle::revert(QPainter *p)
{
    if (!m_font) {
        p->setFont(m_oldFont);
    }
}

QSvgStrokeStyle::QSvgStrokeStyle(const QPen &pen)
    : m_stroke(pen)
{
}

void QSvgStrokeStyle::apply(QPainter *p, const QRectF &, QSvgNode *)
{
    m_oldStroke = p->pen();
    p->setPen(m_stroke);
}

void QSvgStrokeStyle::revert(QPainter *p)
{
    p->setPen(m_oldStroke);
}

QSvgSolidColorStyle::QSvgSolidColorStyle(const QColor &color)
    : m_solidColor(color)
{
}

void QSvgSolidColorStyle::apply(QPainter *p, const QRectF &, QSvgNode *)
{
    m_oldFill = p->brush();
    m_oldStroke = p->pen();
    QBrush b = m_oldFill;
    b.setColor(m_solidColor);
    p->setBrush(b);
    QPen pen = m_oldStroke;
    pen.setColor(m_solidColor);
    p->setPen(pen);
}

void QSvgSolidColorStyle::revert(QPainter *p)
{
    p->setBrush(m_oldFill);
    p->setPen(m_oldStroke);
}

QSvgGradientStyle::QSvgGradientStyle(QGradient *grad, bool resolveBounds)
    : m_gradient(grad), m_resolveBounds(resolveBounds)
{
}

void QSvgGradientStyle::apply(QPainter *p, const QRectF &rect, QSvgNode *)
{
    if (!m_link.isEmpty()) {
        resolveStops();
    }

    m_oldFill = p->brush();

    //resolving stop colors
    if (!m_resolvePoints.isEmpty()) {
        QColor color = p->brush().color();
        if (!color.isValid())
            color = p->pen().color();
        QList<qreal>::const_iterator itr = m_resolvePoints.constBegin();
        for (; itr != m_resolvePoints.constEnd(); ++itr) {
            //qDebug()<<"resolving "<<(*itr)<<" to "<<color;
            m_gradient->setColorAt(*itr, color);
        }
    }

    QBrush brush;
    //we need to resolve boundaries
    //the code is funky i'll have to verify it
    //(testcases right now are bugs/resolve_radial.svg
    // and bugs/resolve_linear.svg)
    if (m_resolveBounds) {
        if (m_gradient->type() == QGradient::LinearGradient) {
            QLinearGradient *grad = (QLinearGradient*)(m_gradient);
            qreal xs, ys, xf, yf;
            xs = rect.x() +  rect.width()  * grad->start().x();
            ys = rect.y() +  rect.height() * grad->start().y();
            xf =  rect.x() + rect.width()  * grad->finalStop().x();
            yf =  rect.y() + rect.height() * grad->finalStop().y();
            QLinearGradient gradient(xs, ys,
                                     xf, yf);
            gradient.setStops(m_gradient->stops());
            gradient.setSpread(m_gradient->spread());
            brush = QBrush(gradient);
        } else {
            QRadialGradient *grad = (QRadialGradient*)m_gradient;
            qreal cx, cy, r, fx, fy;
            cx = rect.width() * grad->center().x();
            cy = rect.height() * grad->center().y();
            //### the radius is wrong. it has to be transformed
            // so that the horizontal on is rect.width() * grad->radius();
            // and vertical rect.height() * grad->radius(). it's a simple
            // transformation but we don't support exclusive fill
            // transformations at the moment
            r  = rect.width() * grad->radius();
            fx = rect.width() * grad->focalPoint().x();
            fy = rect.width() * grad->focalPoint().y();
            //qDebug()<<cx << cy << r << fx << fy;
            QRadialGradient gradient(cx, cy,
                                     r, fx, fy);
            gradient.setStops(m_gradient->stops());
            gradient.setSpread(m_gradient->spread());
            brush = QBrush(gradient);
        }
    } else {
        brush = QBrush(*m_gradient);
    }

    if (!m_matrix.isIdentity())
        brush.setMatrix(m_matrix);

    p->setBrush(brush);
}

void QSvgGradientStyle::revert(QPainter *p)
{
    p->setBrush(m_oldFill);
}


void QSvgGradientStyle::setMatrix(const QMatrix &mat)
{
    m_matrix = mat;
}

void QSvgGradientStyle::addResolve(qreal offset)
{
    m_resolvePoints.append(offset);
}

QSvgTransformStyle::QSvgTransformStyle(const QMatrix &trans)
    : m_transform(trans)
{
}

void QSvgTransformStyle::apply(QPainter *p, const QRectF &, QSvgNode *)
{
    m_oldWorldMatrix = p->matrix();
    p->setMatrix(m_transform, true);
}

void QSvgTransformStyle::revert(QPainter *p)
{
    p->setMatrix(m_oldWorldMatrix, false);//don't combine
}

QSvgStyleProperty::Type QSvgQualityStyle::type() const
{
    return QUALITY;
}

QSvgStyleProperty::Type QSvgFillStyle::type() const
{
    return FILL;
}

QSvgStyleProperty::Type QSvgViewportFillStyle::type() const
{
    return VIEWPORT_FILL;
}

QSvgStyleProperty::Type QSvgFontStyle::type() const
{
    return FONT;
}

QSvgStyleProperty::Type QSvgStrokeStyle::type() const
{
    return STROKE;
}

QSvgStyleProperty::Type QSvgSolidColorStyle::type() const
{
    return SOLID_COLOR;
}

QSvgStyleProperty::Type QSvgGradientStyle::type() const
{
    return GRADIENT;
}

QSvgStyleProperty::Type QSvgTransformStyle::type() const
{
    return TRANSFORM;
}


QSvgCompOpStyle::QSvgCompOpStyle(QPainter::CompositionMode mode)
    : m_mode(mode)
{
    
}

void QSvgCompOpStyle::apply(QPainter *p, const QRectF &, QSvgNode *)
{
    m_oldMode = p->compositionMode();
    p->setCompositionMode(m_mode);
}

void QSvgCompOpStyle::revert(QPainter *p)
{
    p->setCompositionMode(m_oldMode);
}

QSvgStyleProperty::Type QSvgCompOpStyle::type() const
{
    return COMP_OP;
}

QSvgStyle::~QSvgStyle()
{
}

void QSvgStyle::apply(QPainter *p, const QRectF &rect, QSvgNode *node)
{
    if (quality) {
        quality->apply(p, rect, node);
    }

    if (fill) {
        fill->apply(p, rect, node);
    }

    if (viewportFill) {
        viewportFill->apply(p, rect, node);
    }

    if (font) {
        font->apply(p, rect, node);
    }

    if (stroke) {
        stroke->apply(p, rect, node);
    }

    if (solidColor) {
        solidColor->apply(p, rect, node);
    }

    if (gradient) {
        gradient->apply(p, rect, node);
    }

    if (transform) {
        transform->apply(p, rect, node);
    }

    if (animateColor) {
        animateColor->apply(p, rect, node);
    }

    //animated transforms have to be applied
    //_after_ the original object transformations
    if (!animateTransforms.isEmpty()) {
        QList<QSvgRefCounter<QSvgAnimateTransform> >::const_iterator itr;
        for (itr = animateTransforms.constBegin(); itr != animateTransforms.constEnd();
             ++itr) {
            (*itr)->apply(p, rect, node);
        }
    }

    if (opacity) {