/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
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** This file is part of the QtQuick module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
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****************************************************************************/

#include "qsgsoftwareglyphnode_p.h"

QT_BEGIN_NAMESPACE

QSGSoftwareGlyphNode::QSGSoftwareGlyphNode()
    : m_geometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 0)
    , m_style(QQuickText::Normal)
{
    setMaterial((QSGMaterial*)1);
    setGeometry(&m_geometry);
}

namespace {
QRectF calculateBoundingRect(const QPointF &position, const QGlyphRun &glyphs)
{
    qreal minX = 0;
    qreal minY = 0;
    qreal maxX = 0;
    qreal maxY = 0;

    for (int i = 0, n = qMin(glyphs.glyphIndexes().size(), glyphs.positions().size()); i < n; ++i) {
        QRectF glyphRect = glyphs.rawFont().boundingRect(glyphs.glyphIndexes()[i]);
        glyphRect.translate(glyphs.positions()[i]);

        if (i == 0) {
            minX = glyphRect.left();
            minY = glyphRect.top();
            maxX = glyphRect.right();
            maxY = glyphRect.bottom();
        } else {
            minX = qMin(glyphRect.left(), minX);
            minY = qMin(glyphRect.top(), minY);
            maxX = qMax(glyphRect.right(),maxX);
            maxY = qMax(glyphRect.bottom(), maxY);
        }
    }
    QRectF boundingRect(QPointF(minX, minY), QPointF(maxX, maxY));
    return boundingRect.translated(position - QPointF(0.0, glyphs.rawFont().ascent()));
}
}

void QSGSoftwareGlyphNode::setGlyphs(const QPointF &position, const QGlyphRun &glyphs)
{
    m_position = position;
    m_glyphRun = glyphs;
    m_bounding_rect = calculateBoundingRect(position, glyphs);
}

void QSGSoftwareGlyphNode::setColor(const QColor &color)
{
    m_color = color;
}

void QSGSoftwareGlyphNode::setStyle(QQuickText::TextStyle style)
{
    m_style = style;
}

void QSGSoftwareGlyphNode::setStyleColor(const QColor &color)
{
    m_styleColor = color;
}

QPointF QSGSoftwareGlyphNode::baseLine() const
{
    return QPointF();
}

void QSGSoftwareGlyphNode::setPreferredAntialiasingMode(QSGGlyphNode::AntialiasingMode)
{
}

void QSGSoftwareGlyphNode::update()
{
}

void QSGSoftwareGlyphNode::paint(QPainter *painter)
{
    painter->setBrush(QBrush());
    QPointF pos = m_position - QPointF(0, m_glyphRun.rawFont().ascent());

    qreal offset = 1.0;
    if (painter->device()->devicePixelRatioF() > 0.0)
        offset = 1.0 / painter->device()->devicePixelRatioF();

    switch (m_style) {
    case QQuickText::Normal: break;
    case QQuickText::Outline:
        painter->setPen(m_styleColor);
        painter->drawGlyphRun(pos + QPointF(0, offset), m_glyphRun);
        painter->drawGlyphRun(pos + QPointF(0, -offset), m_glyphRun);
        painter->drawGlyphRun(pos + QPointF(offset, 0), m_glyphRun);
        painter->drawGlyphRun(pos + QPointF(-offset, 0), m_glyphRun);
        break;
    case QQuickText::Raised:
        painter->setPen(m_styleColor);
        painter->drawGlyphRun(pos + QPointF(0, offset), m_glyphRun);
        break;
    case QQuickText::Sunken:
        painter->setPen(m_styleColor);
        painter->drawGlyphRun(pos + QPointF(0, -offset), m_glyphRun);
        break;
    }

    painter->setPen(m_color);
    painter->drawGlyphRun(pos, m_glyphRun);
}

QT_END_NAMESPACE