write_jpg()

bool MayaFlux::IO::STBImageWriter::write_jpg ( const std::string &  filepath, const ImageData &  data, const ImageWriteOptions &  options  )

private

Definition at line 187 of file STBImageWriter.cpp.

{
    const auto* src = data.as_uint8();
    if (!src) {
        m_last_error = "JPG requires uint8 ImageData";
        MF_ERROR(Journal::Component::IO, Journal::Context::FileIO, m_last_error);
        return false;
    }
 
    if (data.channels != 1 && data.channels != 3) {
        m_last_error = "JPG supports only 1 or 3 channels (got "
            + std::to_string(data.channels) + ")";
        MF_ERROR(Journal::Component::IO, Journal::Context::FileIO, m_last_error);
        return false;
    }
 
    const int quality = std::clamp(options.quality, 1, 100);
    stbi_flip_vertically_on_write(options.flip_vertically ? 1 : 0);
 
    std::vector<uint8_t> encoded;
    const int ok = stbi_write_jpg_to_func(
        &stbi_memory_writer,
        &encoded,
        static_cast<int>(data.width),
        static_cast<int>(data.height),
        static_cast<int>(data.channels),
        src->data(),
        quality);
 
    if (!ok || encoded.empty()) {
        m_last_error = "stbi_write_jpg_to_func failed";
        MF_ERROR(Journal::Component::IO, Journal::Context::FileIO, m_last_error);
        return false;
    }
 
    if (!flush_to_disk(filepath, encoded)) {
        m_last_error = "Failed to write JPG file: " + filepath;
        MF_ERROR(Journal::Component::IO, Journal::Context::FileIO, m_last_error);
        return false;
    }
 
    MF_INFO(Journal::Component::IO, Journal::Context::FileIO,
        "Wrote JPG: {} ({}x{}, quality {}, {} bytes)",
        filepath, data.width, data.height, quality, encoded.size());
    return true;
}

References MayaFlux::IO::ImageData::as_uint8(), MayaFlux::IO::ImageData::channels, MayaFlux::Journal::FileIO, MayaFlux::IO::ImageWriteOptions::flip_vertically, MayaFlux::IO::ImageData::height, MayaFlux::Journal::IO, m_last_error, MF_ERROR, MF_INFO, MayaFlux::IO::ImageWriteOptions::quality, and MayaFlux::IO::ImageData::width.

Referenced by write().

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