HorizontalBlur.cpp

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#include "HorizontalBlur.h"
 
HorizontalBlur::HorizontalBlur(uint8_t pixels) : pixels(pixels) {}
 
void HorizontalBlur::ApplyEffect(IPixelGroup* pixelGroup) {
    RGBColor* pixelColors = pixelGroup->GetColors();
    RGBColor* colorBuffer = pixelGroup->GetColorBuffer();
 
    for (uint16_t i = 0; i < pixelGroup->GetPixelCount(); i++) {
        uint16_t indexLeft = i;
        uint16_t indexRight = i;
        uint16_t tIndexLeft = 0;
        uint16_t tIndexRight = 0;
        bool validL = false;
        bool validR = false;
 
        uint16_t blurRange = uint16_t(Mathematics::Map(ratio, 0.0f, 1.0f, 1.0f, float(pixels / 2)));
 
        uint16_t R, G, B;
 
        R = (uint16_t)pixelColors[i].R;
        G = (uint16_t)pixelColors[i].G;
        B = (uint16_t)pixelColors[i].B;
 
        for (uint8_t j = 1; j < blurRange + 1; j++) {
            validL = pixelGroup->GetLeftIndex(indexLeft, &tIndexLeft);
            validR = pixelGroup->GetRightIndex(indexRight, &tIndexRight);
 
            indexLeft = tIndexLeft;
            indexRight = tIndexRight;
 
            if (validL && validR) {
                R = R + (uint16_t)pixelColors[indexLeft].R + (uint16_t)pixelColors[indexRight].R;
                G = G + (uint16_t)pixelColors[indexLeft].G + (uint16_t)pixelColors[indexRight].G;
                B = B + (uint16_t)pixelColors[indexLeft].B + (uint16_t)pixelColors[indexRight].B;
            }
        }
 
        colorBuffer[i].R = Mathematics::Constrain(R / (blurRange * 2), 0, 255);
        colorBuffer[i].B = Mathematics::Constrain(G / (blurRange * 2), 0, 255);
        colorBuffer[i].G = Mathematics::Constrain(B / (blurRange * 2), 0, 255);
    }
 
    for (uint16_t i = 0; i < pixelGroup->GetPixelCount(); i++) {
        pixelColors[i].R = colorBuffer[i].R;
        pixelColors[i].G = colorBuffer[i].G;
        pixelColors[i].B = colorBuffer[i].B;
    }
}