Method orientToTopLeft

src/Image.cpp:472–518

}

Task<void> ImageData::orientToTopLeft(int priority) {
    if (orientation == EOrientation::None || orientation == EOrientation::TopLeft) {
        orientation = EOrientation::TopLeft;
        co_return;
    }

    const bool swapAxes = orientation >= EOrientation::LeftTop;

    struct DataDesc {
        shared_ptr<PixelBuffer> data;
        Vector2i size;

        struct Hash {
            size_t operator()(const DataDesc& interval) const { return hash<shared_ptr<PixelBuffer>>()(interval.data); }
        };

        bool operator==(const DataDesc& other) const { return data == other.data && size == other.size; }
    };

    unordered_set<DataDesc, DataDesc::Hash> channelData;
    for (auto& c : channels) {
        // TODO: ensure channel data is interleaved if multiple channels share the same data buffer

        channelData.insert({c.dataBuf(), c.size()});
        if (swapAxes) {
            c.setSize({c.size().y(), c.size().x()});
        }
    }

    vector<Task<nanogui::Vector2i>> tasks;
    for (auto& c : channelData) {
        tasks.emplace_back(tev::orientToTopLeft(*c.data, c.size, orientation, priority));
    }

    co_await awaitAll(span{tasks});

    const auto referenceWindow = displayWindow.isValid() ? displayWindow : (dataWindow.isValid() ? dataWindow : Box2i{size()});
    if (dataWindow.isValid()) {
        dataWindow = applyOrientation(orientation, dataWindow, referenceWindow);
    }

    if (displayWindow.isValid()) {
        displayWindow = applyOrientation(orientation, displayWindow, referenceWindow);
    }

    orientation = EOrientation::TopLeft;
}

void ImageData::updateLayers() {
    layers.clear();