mirror of
https://github.com/RGBCube/serenity
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556addc5cb
These are written by `mutool extract` for CMYK images. They don't contain color profiles so they're not super convenient. But `image` can convert them (*) to sRGB as long as you use it with `--assign-color-profile` pointing to some CMYK icc profile of your choice. *: Once #22922 is merged.
93 lines
3.1 KiB
C++
93 lines
3.1 KiB
C++
/*
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* Copyright (c) 2024, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/StringView.h>
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#include <LibGfx/ImageFormats/ImageDecoder.h>
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#include <LibGfx/ImageFormats/PortableImageMapLoader.h>
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namespace Gfx {
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struct PAM {
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static constexpr auto binary_magic_number = '7';
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static constexpr StringView image_type = "PAM"sv;
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u16 max_val { 0 };
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u16 depth { 0 };
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String tupl_type {};
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Optional<NonnullRefPtr<CMYKBitmap>> cmyk_bitmap {};
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};
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using PAMLoadingContext = PortableImageMapLoadingContext<PAM>;
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template<class Context>
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ErrorOr<void> read_pam_header(Context& context)
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{
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// https://netpbm.sourceforge.net/doc/pam.html
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TRY(read_magic_number(context));
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Optional<u16> width;
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Optional<u16> height;
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Optional<u16> depth;
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Optional<u16> max_val;
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Optional<String> tupltype;
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while (true) {
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TRY(read_whitespace(context));
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auto const token = TRY(read_token(*context.stream));
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if (token == "ENDHDR") {
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auto newline = TRY(context.stream->template read_value<u8>());
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if (newline != '\n')
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return Error::from_string_view("PAM ENDHDR not followed by newline"sv);
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break;
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}
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TRY(read_whitespace(context));
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if (token == "WIDTH") {
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if (width.has_value())
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return Error::from_string_view("Duplicate PAM WIDTH field"sv);
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width = TRY(read_number(*context.stream));
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} else if (token == "HEIGHT") {
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if (height.has_value())
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return Error::from_string_view("Duplicate PAM HEIGHT field"sv);
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height = TRY(read_number(*context.stream));
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} else if (token == "DEPTH") {
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if (depth.has_value())
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return Error::from_string_view("Duplicate PAM DEPTH field"sv);
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depth = TRY(read_number(*context.stream));
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} else if (token == "MAXVAL") {
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if (max_val.has_value())
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return Error::from_string_view("Duplicate PAM MAXVAL field"sv);
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max_val = TRY(read_number(*context.stream));
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} else if (token == "TUPLTYPE") {
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// FIXME: tupltype should be all text until the next newline, with leading and trailing space stripped.
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// FIXME: If there are multipe TUPLTYPE lines, their values are all appended.
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tupltype = TRY(read_token(*context.stream));
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} else {
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return Error::from_string_view("Unknown PAM token"sv);
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}
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}
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if (!width.has_value() || !height.has_value() || !depth.has_value() || !max_val.has_value())
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return Error::from_string_view("Missing PAM header fields"sv);
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context.width = *width;
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context.height = *height;
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context.format_details.depth = *depth;
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context.format_details.max_val = *max_val;
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if (tupltype.has_value())
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context.format_details.tupl_type = *tupltype;
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context.state = Context::State::HeaderDecoded;
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return {};
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}
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using PAMImageDecoderPlugin = PortableImageDecoderPlugin<PAMLoadingContext>;
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ErrorOr<void> read_image_data(PAMLoadingContext& context);
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}
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