mySprite.cpp

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#include "utils.h"
#include "mySprite.h"
 
future<void> MySprite::asyncLoad(const string& fname){
    DEBUG_MSG("Load file " << fname)
    return std::async(std::launch::async, [fname, this]() -> void {
        ptr = std::make_unique<nsGui::Sprite>(fname);
    });
}
 
void MySprite::mirror(MySprite& msp) {
    const vector<RGBAcolor>& inPixels = msp.ptr->getPixelData();
    unsigned rowSize = msp.ptr->getRowSize();
 
    vector<RGBAcolor> outPixels;
    // we reserve size so the vector doesn't dynamically grows
    outPixels.reserve(inPixels.size());
    //for each line of pixel
    for(unsigned rowOffset=0; rowOffset < inPixels.size(); rowOffset+=rowSize){
        // for each pixel of that line
        for(unsigned j=0;j<rowSize;++j) {
            // push back the pixel opposed to this one (still in the same line)
            outPixels.push_back(inPixels[rowOffset + rowSize - j - 1]);
        }
    }
    ptr = std::make_unique<nsGui::Sprite>(outPixels, rowSize);
}