Method enableShadow

core/2d/Label.cpp:1485–1532

}

void Label::enableShadow(const Color4B& shadowColor /* = Color4B::BLACK */,
                         const Vec2& offset /* = Vec2(2 ,-2)*/,
                         int /* blurRadius = 0 */)
{
    _shadowEnabled = true;
    _shadowDirty   = true;

    _shadowOffset.width  = offset.width;
    _shadowOffset.height = offset.height;
    // TODO: support blur for shadow

    _shadowColor3B.r = shadowColor.r;
    _shadowColor3B.g = shadowColor.g;
    _shadowColor3B.b = shadowColor.b;
    _shadowOpacity   = shadowColor.a;

    if (!_systemFontDirty && !_contentDirty && _textSprite)
    {
        auto fontDef = _getFontDefinition();
        if (_shadowNode)
        {
            if (shadowColor != _shadowColor4F)
            {
                _shadowNode->release();
                _shadowNode = nullptr;
                createShadowSpriteForSystemFont(fontDef);
            }
            else
            {
                _shadowNode->setPosition(_shadowOffset.width, _shadowOffset.height);
            }
        }
        else
        {
            createShadowSpriteForSystemFont(fontDef);
        }
    }

    _shadowColor4F.r = shadowColor.r / 255.0f;
    _shadowColor4F.g = shadowColor.g / 255.0f;
    _shadowColor4F.b = shadowColor.b / 255.0f;
    _shadowColor4F.a = shadowColor.a / 255.0f;

    if (_currentLabelType == LabelType::BMFONT || _currentLabelType == LabelType::CHARMAP)
    {
        updateShaderProgram();
    }
}

void Label::enableItalics()
{