write_png()

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

private

Definition at line 138 of file STBImageWriter.cpp.

{
    const auto* src = data.as_uint8();
    if (!src) {
        m_last_error = "PNG requires uint8 ImageData";
        MF_ERROR(Journal::Component::IO, Journal::Context::FileIO, m_last_error);
        return false;
    }
 
    const int compression = (options.compression >= 0 && options.compression <= 9)
        ? options.compression
        : 6;
    stbi_write_png_compression_level = compression;
    stbi_flip_vertically_on_write(options.flip_vertically ? 1 : 0);
 
    std::vector<uint8_t> encoded;
    encoded.reserve(static_cast<size_t>(data.width) * data.height * data.channels);
 
    const int stride = static_cast<int>(data.width * data.channels);
    const int ok = stbi_write_png_to_func(
        &stbi_memory_writer,
        &encoded,
        static_cast<int>(data.width),
        static_cast<int>(data.height),
        static_cast<int>(data.channels),
        src->data(),
        stride);
 
    if (!ok || encoded.empty()) {
        m_last_error = "stbi_write_png_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 PNG file: " + filepath;
        MF_ERROR(Journal::Component::IO, Journal::Context::FileIO, m_last_error);
        return false;
    }
 
    MF_INFO(Journal::Component::IO, Journal::Context::FileIO,
        "Wrote PNG: {} ({}x{}, {} channels, {} bytes)",
        filepath, data.width, data.height, data.channels, encoded.size());
    return true;
}

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

Referenced by write().

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