Creating image with Boost.GIL

Question

I've been trying to read the boost::gil documentation, but it's somewhere between lacking, and convoluted.

Ranting aside, I need an example on how to do the following:

Create an image of, say 512x512. Fill it with red pixels. Write to PNG.

I can't find anything about doing any of that, at all, in the documentation for gil. Particularly the creating an image or filling it with pixels part.

If anyone can help, thanks.

Answer 1

I haven't used GIL yet, but I want to learn it as well. Having looked at the design guide and having googled up the error related to libpng, looks like the simplest example is

#define png_infopp_NULL (png_infopp)NULL
#define int_p_NULL (int*)NULL
#include <boost/gil/gil_all.hpp>
#include <boost/gil/extension/io/png_dynamic_io.hpp>
using namespace boost::gil;
int main()
{
    rgb8_image_t img(512, 512);
    rgb8_pixel_t red(255, 0, 0);
    fill_pixels(view(img), red);
    png_write_view("redsquare.png", const_view(img));
}

works for me, with -lpng on command line, producing this image