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Userland: Add an image utility

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At the moment, all it can do is read all image formats that LibGfx can
read and save to any image format that LibGfx can write (currently bmp,
png, qoi).

Currently, it drops all image metadata (including color profiles).

Over time, this could learn tricks like keeping color profiles,
converting an image to a different color profile, cropping out a part of
an image, and so on.
This commit is contained in:
Nico Weber 2023-03-11 19:33:17 -05:00 • committed by Linus Groh
parent 3cff36b7ab
commit b10ec6743f
3 changed files with 59 additions and 0 deletions
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55
Userland/Utilities/image.cpp Normal file
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/*
* Copyright (c) 2023, Nico Weber <thakis@chromium.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCore/MappedFile.h>
#include <LibGfx/BMPWriter.h>
#include <LibGfx/ImageDecoder.h>
#include <LibGfx/PNGWriter.h>
#include <LibGfx/QOIWriter.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
Core::ArgsParser args_parser;
StringView in_path;
args_parser.add_positional_argument(in_path, "Path to input image file", "FILE");
StringView out_path;
args_parser.add_option(out_path, "Path to output image file", "output", 'o', "FILE");
args_parser.parse(arguments);
if (out_path.is_empty()) {
warnln("-o is required");
return 1;
}
auto file = TRY(Core::MappedFile::map(in_path));
auto decoder = Gfx::ImageDecoder::try_create_for_raw_bytes(file->bytes());
// This uses ImageDecoder instead of Bitmap::load_from_file() to have more control
// over selecting a frame, access color profile data, and so on in the future.
auto frame = TRY(decoder->frame(0)).image;
ByteBuffer bytes;
if (out_path.ends_with(".bmp"sv, CaseSensitivity::CaseInsensitive)) {
bytes = Gfx::BMPWriter().dump(frame);
} else if (out_path.ends_with(".png"sv, CaseSensitivity::CaseInsensitive)) {
bytes = TRY(Gfx::PNGWriter::encode(*frame));
} else if (out_path.ends_with(".qoi"sv, CaseSensitivity::CaseInsensitive)) {
bytes = Gfx::QOIWriter::encode(*frame);
} else {
warnln("can only write .bmp, .png, and .qoi");
return 1;
}
auto output_stream = TRY(Core::File::open(out_path, Core::File::OpenMode::Write));
TRY(output_stream->write_entire_buffer(bytes));
return 0;
}