ImageGear for C and C++ on Windows v21.0 - Updated
API Reference Guide / Core Component API Reference / Core Component Enumerations Reference / enumPNGCompLevel
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    enumPNGCompLevel
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    Specifies PNG compression level.

    Values:

    IG_PNG_MIN_COMPRESSION Minimum level of PNG compression.
    IG_PNG_MAX_COMPRESSION Maximum level of PNG compression.
    IG_PNG_DEFAULT_COMPRESSION Default PNG compression level.