Method setCurrentSize

src/SFML/Graphics/Font.cpp:766–803

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bool Font::setCurrentSize(unsigned int characterSize) const
{
    // FT_Set_Pixel_Sizes is an expensive function, so we must call it
    // only when necessary to avoid killing performances

    // m_fontHandles and m_fontHandles->face are checked to be non-null before calling this method
    FT_Face         face        = m_fontHandles->face;
    const FT_UShort currentSize = face->size->metrics.x_ppem;

    if (currentSize != characterSize)
    {
        const FT_Error result = FT_Set_Pixel_Sizes(face, 0, characterSize);

        if (result == FT_Err_Invalid_Pixel_Size)
        {
            // In the case of bitmap fonts, resizing can
            // fail if the requested size is not available
            if (!FT_IS_SCALABLE(face))
            {
                err() << "Failed to set bitmap font size to " << characterSize << '\n' << "Available sizes are: ";
                for (int i = 0; i < face->num_fixed_sizes; ++i)
                {
                    const long size = (face->available_sizes[i].y_ppem + 32) >> 6;
                    err() << size << " ";
                }
                err() << std::endl;
            }
            else
            {
                err() << "Failed to set font size to " << characterSize << std::endl;
            }
        }

        return result == FT_Err_Ok;
    }

    return true;
}


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