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How to resize png image with alpha canal in boost::gil?

boost::gil::rgb8_image_t image;
boost::gil::rgb8_image_t newSize(640, 480);
boost::gil::png_read_and_convert_image("input.png",image);
boost::gil::resize_view(const_view(image), view(newSize), boost::gil::bilinear_sampler());
boost::gil::png_write_view("output.png",const_view(newSize));
mloskot
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Артём Селивановских
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  • Is this a question or the answer? If it's question, what is the question? That code not working? Is it? Why not? etc. – sehe Nov 18 '15 at 13:59
  • Besides, `resize_view` is not in boost. What are you using? – sehe Nov 18 '15 at 14:14

1 Answers1

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Your problem is not with resizing but with loading the original PNG in the first place, because boost::gil::rgb8_image_t is an image type without an alpha channel.

The solution is to simply use boost::gil::rgba8_image_t, which includes an alpha channel.

Christian Hackl
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