Using Boost.GIL to convert an image into “raw” bytes

Question

Goal

I\'m trying to move towards Boost GIL to replace some similar functionality I\'ve implemented that is reaching the end of its maintainable life.

I have

Answer 1

I would just push_back each color of the rgb8_pixel_t individually:

struct PixelInserter{
        std::vector* storage;
        PixelInserter(std::vector* s) : storage(s) {}
        void operator()(boost::gil::rgb8_pixel_t p) const {
                storage->push_back(boost::gil::at_c<0>(p));
                storage->push_back(boost::gil::at_c<1>(p));
                storage->push_back(boost::gil::at_c<2>(p));
        }
};

int main() {
  std::vector storage;
  {
    using namespace boost::gil;
    rgb8_image_t img;
    png_read_image("test.png", img);
    storage.reserve(img.width() * img.height() * num_channels());
    for_each_pixel(const_view(img), PixelInserter(&storage));
  }
...
}

...but I'm not an expert on GIL either.