/**
* Get the text rendering shader.
* @param[in] factoryCache A pointer pointing to the VisualFactoryCache object
* @param[in] hasMultipleTextColors Whether the text contains multiple colors.
/**
* Get the text rendering shader.
* @param[in] factoryCache A pointer pointing to the VisualFactoryCache object
* @param[in] hasMultipleTextColors Whether the text contains multiple colors.