crgbToJson()

optional< json > fl::crgbToJson

(

span< const CRGB >

pixels

)

Encode a CRGB pixel buffer as a versioned JSON object.

Parameters

pixels

Pixel buffer to encode.

Returns

JSON object with version and pixels fields, or nullopt if the document could not be built (for example, due to allocation failure).

Definition at line 63 of file crgb_json.cpp.hpp.

                                                                {
    json encodedPixels = json::array();
    if (!encodedPixels.is_array()) {
        return fl::nullopt;
    }
 
    for (const CRGB& pixel : pixels) {
        json encodedPixel = json::array();
        if (!encodedPixel.is_array()) {
            return fl::nullopt;
        }
 
        encodedPixel.push_back(json(static_cast<int>(pixel.r)));
        encodedPixel.push_back(json(static_cast<int>(pixel.g)));
        encodedPixel.push_back(json(static_cast<int>(pixel.b)));
        if (encodedPixel.size() != 3 || !crgbJsonPixel(encodedPixel)) {
            return fl::nullopt;
        }
 
        const size oldSize = encodedPixels.size();
        encodedPixels.push_back(encodedPixel);
        if (encodedPixels.size() != oldSize + 1) {
            return fl::nullopt;
        }
    }
 
    json document = json::object();
    if (!document.is_object()) {
        return fl::nullopt;
    }
    document.set("version", 1);
    document.set("pixels", encodedPixels);
    if (!crgbJsonMatches(document, pixels)) {
        return fl::nullopt;
    }
    return document;
}

References fl::json::array(), FL_NO_EXCEPT, fl::json::is_array(), fl::json::is_object(), nullopt, fl::json::object(), fl::json::push_back(), fl::json::set(), and fl::json::size().

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