Function writeMapToFileOrTile

src/aliceVision/mvsUtils/mapIO.cpp:403–540

template<typename T>
void writeMapToFileOrTile(int rc,
                          const MultiViewParams& mp,
                          const EFileType fileType,
                          const TileParams& tileParams,
                          const ROI& roi,
                          const image::Image<T>& in_map,
                          int scale,
                          int step,
                          const std::string& customSuffix = "")
{
    // assert scale & step
    assert(scale > 0);
    assert(step > 0);

    const int scaleStep = scale * step;

    // get image dimensions at scale / stepXY
    const int imageWidth = divideRoundUp(mp.getWidth(rc), scaleStep);
    const int imageHeight = divideRoundUp(mp.getHeight(rc), scaleStep);

    // get downscaled ROI
    const ROI downscaledROI = downscaleROI(roi, scaleStep);

    // check input map dimensions
    assert(in_map.width() == downscaledROI.width() && in_map.width() <= imageWidth);
    assert(in_map.height() == downscaledROI.height() && in_map.height() <= imageHeight);

    // set OIIO ROI for map writing
    // displayRoi is the image region of interest for display (image size)
    // pixelRoi is the buffer region of interest within the displayRoi (tile size)
    // no tiling if displayRoi == pixelRoi
    const oiio::ROI displayRoi(0, imageWidth, 0, imageHeight);
    const oiio::ROI pixelRoi(downscaledROI.x.begin, downscaledROI.x.end, downscaledROI.y.begin, downscaledROI.y.end);

    // output map path
    std::string mapPath;

    if (downscaledROI.width() != imageWidth || downscaledROI.height() != imageHeight)  // is a tile
    {
        // tiled map
        mapPath = getFileNameFromIndex(mp, rc, fileType, customSuffix, roi.x.begin, roi.y.begin);
    }
    else
    {
        // fullsize map
        mapPath = getFileNameFromIndex(mp, rc, fileType, customSuffix);
    }

    // original picture file metadata
    oiio::ParamValueList metadata = image::getMetadataFromMap(mp.getMetadata(rc));

    // downscale metadata
    metadata.push_back(oiio::ParamValue("AliceVision:downscale", mp.getDownscaleFactor(rc) * scaleStep));

    // roi metadata
    {
        metadata.push_back(oiio::ParamValue("AliceVision:roiBeginX", int(roi.x.begin)));
        metadata.push_back(oiio::ParamValue("AliceVision:roiBeginY", int(roi.y.begin)));