void QSGTextMaskMaterial::populate(const QPointF &p,
                                   const QVector<quint32> &glyphIndexes,
                                   const QVector<QPointF> &glyphPositions,
                                   QSGGeometry *geometry,
                                   QRectF *boundingRect,
                                   QPointF *baseLine,
                                   const QMargins &margins)
{
    Q_ASSERT(m_font.isValid());
    QVector<QFixedPoint> fixedPointPositions;
    for (int i=0; i<glyphPositions.size(); ++i)
        fixedPointPositions.append(QFixedPoint::fromPointF(glyphPositions.at(i)));

    QTextureGlyphCache *cache = glyphCache();

    QRawFontPrivate *fontD = QRawFontPrivate::get(m_font);
    cache->populate(fontD->fontEngine, glyphIndexes.size(), glyphIndexes.constData(),
                    fixedPointPositions.data());
    cache->fillInPendingGlyphs();

    int margin = fontD->fontEngine->glyphMargin(cache->cacheType());

    Q_ASSERT(geometry->indexType() == GL_UNSIGNED_SHORT);
    geometry->allocate(glyphIndexes.size() * 4, glyphIndexes.size() * 6);
    QVector4D *vp = (QVector4D *)geometry->vertexDataAsTexturedPoint2D();
    Q_ASSERT(geometry->sizeOfVertex() == sizeof(QVector4D));
    ushort *ip = geometry->indexDataAsUShort();

    QPointF position(p.x(), p.y() - m_font.ascent());
    bool supportsSubPixelPositions = fontD->fontEngine->supportsSubPixelPositions();
    for (int i=0; i<glyphIndexes.size(); ++i) {
         QFixed subPixelPosition;
         if (supportsSubPixelPositions)
             subPixelPosition = fontD->fontEngine->subPixelPositionForX(QFixed::fromReal(glyphPositions.at(i).x()));

         QTextureGlyphCache::GlyphAndSubPixelPosition glyph(glyphIndexes.at(i), subPixelPosition);
         const QTextureGlyphCache::Coord &c = cache->coords.value(glyph);

         QPointF glyphPosition = glyphPositions.at(i) + position;
         int x = qFloor(glyphPosition.x()) + c.baseLineX - margin;
         int y = qFloor(glyphPosition.y()) - c.baseLineY - margin;

         *boundingRect |= QRectF(x + margin, y + margin, c.w, c.h);

         float cx1 = x - margins.left();
         float cx2 = x + c.w + margins.right();
         float cy1 = y - margins.top();
         float cy2 = y + c.h + margins.bottom();

         float tx1 = c.x - margins.left();
         float tx2 = c.x + c.w + margins.right();
         float ty1 = c.y - margins.top();
         float ty2 = c.y + c.h + margins.bottom();

         if (baseLine->isNull())
             *baseLine = glyphPosition;

         vp[4 * i + 0] = QVector4D(cx1, cy1, tx1, ty1);
         vp[4 * i + 1] = QVector4D(cx2, cy1, tx2, ty1);
         vp[4 * i + 2] = QVector4D(cx1, cy2, tx1, ty2);
         vp[4 * i + 3] = QVector4D(cx2, cy2, tx2, ty2);

         int o = i * 4;
         ip[6 * i + 0] = o + 0;
         ip[6 * i + 1] = o + 2;
         ip[6 * i + 2] = o + 3;
         ip[6 * i + 3] = o + 3;
         ip[6 * i + 4] = o + 1;
         ip[6 * i + 5] = o + 0;
    }
}