ffx_format.md

FFX (Filters Unlimited) file format

FFXFile = {
    FFXString         fileVersion        // "FFX1.0", or "FFX1.1", or "FFX1.2"
    FFXString         title
    FFXString         category
    FFXString         author
    FFXString         copyright
    FFXString[5]      channels           // I (Intro), R (Red), G (Green), B (Blue), A (Alpha)
    FFXSliderInfo[8]  sliders
    uint32_t          gradientIndex
    uint32_t          bitmapInfoSize     // only in FFX >= 1.2, otherwise not present
    FFXBitmapInfo     bitmapInfo         // only in FFX >= 1.2, otherwise not present
    uint32_t          numPresets         // only in FFX >= 1.1, otherwise not present
    FFXPreset[]       presets            // only in FFX >= 1.1, otherwise not present
}

FFXBitmapInfo = {
    char[7]           szFilesize         // human-readable filesize in decimal notation (numeric string) with NUL terminator(s)
    char[]            jpgData
}

FFXString = {
    uint32_t          length
    char[]            value
}

FFXSliderInfo = {
    uint32_t          nameLength
    char[]            name               // In FFX >= 1.2: Slider can have names prefixes:
                                         // {C} = Checkbox
                                         // {S} or none = Slider
    byte              enabled
    int32_t           initialValue
}

FFXPreset = {
    FFXString         name
    int32_t[8]        sliderPosition
    int32_t           gradientIndex
    int32_t           jpegThumbnailWidth
    int32_t           jpegThumbnailHeight
    int32_t           jpegThumbnailLength
    byte[]            jpegThumbnailData
}