/* * Copyright (c) 2023, Nico Weber * * SPDX-License-Identifier: BSD-2-Clause */ #include #include #include #include #include #include #include #include #include #include #include using AnyBitmap = Variant, RefPtr>; struct LoadedImage { Gfx::NaturalFrameFormat internal_format; AnyBitmap bitmap; Optional icc_data; }; static ErrorOr load_image(RefPtr const& decoder, int frame_index) { auto internal_format = decoder->natural_frame_format(); auto bitmap = TRY([&]() -> ErrorOr { switch (internal_format) { case Gfx::NaturalFrameFormat::RGB: case Gfx::NaturalFrameFormat::Grayscale: case Gfx::NaturalFrameFormat::Vector: return TRY(decoder->frame(frame_index)).image; case Gfx::NaturalFrameFormat::CMYK: return RefPtr(TRY(decoder->cmyk_frame())); } VERIFY_NOT_REACHED(); }()); return LoadedImage { internal_format, move(bitmap), TRY(decoder->icc_data()) }; } static ErrorOr invert_cmyk(LoadedImage& image) { if (!image.bitmap.has>()) return Error::from_string_literal("Can't --invert-cmyk with RGB bitmaps"); auto& frame = image.bitmap.get>(); for (auto& pixel : *frame) { pixel.c = ~pixel.c; pixel.m = ~pixel.m; pixel.y = ~pixel.y; pixel.k = ~pixel.k; } return {}; } static ErrorOr crop_image(LoadedImage& image, Gfx::IntRect const& rect) { if (!image.bitmap.has>()) return Error::from_string_literal("Can't --crop CMYK bitmaps yet"); auto& frame = image.bitmap.get>(); frame = TRY(frame->cropped(rect)); return {}; } static ErrorOr move_alpha_to_rgb(LoadedImage& image) { if (!image.bitmap.has>()) return Error::from_string_literal("Can't --move-alpha-to-rgb with CMYK bitmaps"); auto& frame = image.bitmap.get>(); switch (frame->format()) { case Gfx::BitmapFormat::Invalid: return Error::from_string_literal("Can't --move-alpha-to-rgb with invalid bitmaps"); case Gfx::BitmapFormat::RGBA8888: // No image decoder currently produces bitmaps with this format. // If that ever changes, preferrably fix the image decoder to use BGRA8888 instead :) // If there's a good reason for not doing that, implement support for this, I suppose. return Error::from_string_literal("--move-alpha-to-rgb not implemented for RGBA8888"); case Gfx::BitmapFormat::BGRA8888: case Gfx::BitmapFormat::BGRx8888: // FIXME: If BitmapFormat::Gray8 existed (and image encoders made use of it to write grayscale images), we could use it here. for (auto& pixel : *frame) { u8 alpha = pixel >> 24; pixel = 0xff000000 | (alpha << 16) | (alpha << 8) | alpha; } break; case Gfx::BitmapFormat::RGBx8888: // This should never be the case, as there's no alpha channel in the image return Error::from_string_literal("Can't --move-alpha-to-rgb with RGBx8888 bitmaps"); } return {}; } static ErrorOr strip_alpha(LoadedImage& image) { if (!image.bitmap.has>()) return Error::from_string_literal("Can't --strip-alpha with CMYK bitmaps"); auto& frame = image.bitmap.get>(); switch (frame->format()) { case Gfx::BitmapFormat::Invalid: return Error::from_string_literal("Can't --strip-alpha with invalid bitmaps"); case Gfx::BitmapFormat::RGBA8888: // No image decoder currently produces bitmaps with this format. // If that ever changes, preferrably fix the image decoder to use BGRA8888 instead :) // If there's a good reason for not doing that, implement support for this, I suppose. return Error::from_string_literal("--strip-alpha not implemented for RGBA8888"); case Gfx::BitmapFormat::BGRA8888: case Gfx::BitmapFormat::BGRx8888: // BGRx8888 is sent as BGRA8888 to Skia, // that's why we need to ensure there's no "alpha channel" left frame->strip_alpha_channel(); break; case Gfx::BitmapFormat::RGBx8888: // This format means there's no alpha channel, so nothing to do here break; } return {}; } static ErrorOr> convert_image_profile(LoadedImage& image, StringView convert_color_profile_path, OwnPtr maybe_source_icc_file) { if (!image.icc_data.has_value()) return Error::from_string_literal("No source color space embedded in image. Pass one with --assign-color-profile."); auto source_icc_file = move(maybe_source_icc_file); auto source_icc_data = image.icc_data.value(); auto icc_file = TRY(Core::MappedFile::map(convert_color_profile_path)); image.icc_data = icc_file->bytes(); auto source_profile = TRY(Gfx::ICC::Profile::try_load_from_externally_owned_memory(source_icc_data)); auto destination_profile = TRY(Gfx::ICC::Profile::try_load_from_externally_owned_memory(icc_file->bytes())); if (destination_profile->data_color_space() != Gfx::ICC::ColorSpace::RGB) return Error::from_string_literal("Can only convert to RGB at the moment, but destination color space is not RGB"); if (image.bitmap.has>()) { if (source_profile->data_color_space() != Gfx::ICC::ColorSpace::CMYK) return Error::from_string_literal("Source image data is CMYK but source color space is not CMYK"); auto& cmyk_frame = image.bitmap.get>(); auto rgb_frame = TRY(Gfx::Bitmap::create(Gfx::BitmapFormat::BGRx8888, cmyk_frame->size())); TRY(destination_profile->convert_cmyk_image(*rgb_frame, *cmyk_frame, *source_profile)); image.bitmap = RefPtr(move(rgb_frame)); image.internal_format = Gfx::NaturalFrameFormat::RGB; } else { // FIXME: This likely wrong for grayscale images because they've been converted to // RGB at this point, but their embedded color profile is still for grayscale. auto& frame = image.bitmap.get>(); TRY(destination_profile->convert_image(*frame, *source_profile)); } return icc_file; } static ErrorOr save_image(LoadedImage& image, StringView out_path, u8 jpeg_quality, Optional webp_allowed_transforms) { auto stream = [out_path]() -> ErrorOr> { auto output_stream = TRY(Core::File::open(out_path, Core::File::OpenMode::Write)); return Core::OutputBufferedFile::create(move(output_stream)); }; auto& frame = image.bitmap.get>(); if (out_path.ends_with(".gif"sv, CaseSensitivity::CaseInsensitive)) { TRY(Gfx::GIFWriter::encode(*TRY(stream()), *frame)); return {}; } if (out_path.ends_with(".jpg"sv, CaseSensitivity::CaseInsensitive) || out_path.ends_with(".jpeg"sv, CaseSensitivity::CaseInsensitive)) { TRY(Gfx::JPEGWriter::encode(*TRY(stream()), *frame, { .icc_data = image.icc_data, .quality = jpeg_quality })); return {}; } if (out_path.ends_with(".webp"sv, CaseSensitivity::CaseInsensitive)) { Gfx::WebPWriter::Options options; options.icc_data = image.icc_data; if (webp_allowed_transforms.has_value()) options.vp8l_options.allowed_transforms = webp_allowed_transforms.value(); TRY(Gfx::WebPWriter::encode(*TRY(stream()), *frame, options)); return {}; } ByteBuffer bytes; if (out_path.ends_with(".bmp"sv, CaseSensitivity::CaseInsensitive)) { bytes = TRY(Gfx::BMPWriter::encode(*frame, { .icc_data = image.icc_data })); } else if (out_path.ends_with(".png"sv, CaseSensitivity::CaseInsensitive)) { bytes = TRY(Gfx::PNGWriter::encode(*frame, { .icc_data = image.icc_data })); } else { return Error::from_string_literal("can only write .bmp, .gif, .jpg, .png, and .webp"); } TRY(TRY(stream())->write_until_depleted(bytes)); return {}; } struct Options { StringView in_path; StringView out_path; bool no_output = false; int frame_index = 0; bool invert_cmyk = false; Optional crop_rect; bool move_alpha_to_rgb = false; bool strip_alpha = false; StringView assign_color_profile_path; StringView convert_color_profile_path; bool strip_color_profile = false; u8 quality = 75; Optional webp_allowed_transforms; }; template static ErrorOr> parse_comma_separated_numbers(StringView rect_string) { auto parts = rect_string.split_view(','); Vector part_numbers; for (size_t i = 0; i < parts.size(); ++i) { auto part = parts[i].to_number(); if (!part.has_value()) return Error::from_string_literal("comma-separated parts must be numbers"); TRY(part_numbers.try_append(part.value())); } return part_numbers; } static ErrorOr parse_rect_string(StringView rect_string) { auto numbers = TRY(parse_comma_separated_numbers(rect_string)); if (numbers.size() != 4) return Error::from_string_literal("rect must have 4 comma-separated parts"); return Gfx::IntRect { numbers[0], numbers[1], numbers[2], numbers[3] }; } static ErrorOr parse_webp_allowed_transforms_string(StringView string) { unsigned allowed_transforms = 0; for (StringView part : string.split_view(',')) { if (part == "predictor" || part == "p") allowed_transforms |= 1 << Gfx::PREDICTOR_TRANSFORM; else if (part == "color" || part == "c") allowed_transforms |= 1 << Gfx::COLOR_TRANSFORM; else if (part == "subtract-green" || part == "sg") allowed_transforms |= 1 << Gfx::SUBTRACT_GREEN_TRANSFORM; else if (part == "color-indexing" || part == "ci") allowed_transforms |= 1 << Gfx::COLOR_INDEXING_TRANSFORM; else return Error::from_string_literal("unknown WebP transform; valid values: predictor, p, color, c, subtract-green, sg, color-indexing, ci"); } return allowed_transforms; } static ErrorOr parse_options(Main::Arguments arguments) { Options options; Core::ArgsParser args_parser; args_parser.add_positional_argument(options.in_path, "Path to input image file", "FILE"); args_parser.add_option(options.out_path, "Path to output image file", "output", 'o', "FILE"); args_parser.add_option(options.no_output, "Do not write output (only useful for benchmarking image decoding)", "no-output", {}); args_parser.add_option(options.frame_index, "Which frame of a multi-frame input image (0-based)", "frame-index", {}, "INDEX"); args_parser.add_option(options.invert_cmyk, "Invert CMYK channels", "invert-cmyk", {}); StringView crop_rect_string; args_parser.add_option(crop_rect_string, "Crop to a rectangle", "crop", {}, "x,y,w,h"); args_parser.add_option(options.move_alpha_to_rgb, "Copy alpha channel to rgb, clear alpha", "move-alpha-to-rgb", {}); args_parser.add_option(options.strip_alpha, "Remove alpha channel", "strip-alpha", {}); args_parser.add_option(options.assign_color_profile_path, "Load color profile from file and assign it to output image", "assign-color-profile", {}, "FILE"); args_parser.add_option(options.convert_color_profile_path, "Load color profile from file and convert output image from current profile to loaded profile", "convert-to-color-profile", {}, "FILE"); args_parser.add_option(options.strip_color_profile, "Do not write color profile to output", "strip-color-profile", {}); args_parser.add_option(options.quality, "Quality used for the JPEG encoder, the default value is 75 on a scale from 0 to 100", "quality", {}, {}); StringView webp_allowed_transforms = "default"sv; args_parser.add_option(webp_allowed_transforms, "Comma-separated list of allowed transforms (predictor,p,color,c,subtract-green,sg,color-indexing,ci) for WebP output (default: all allowed)", "webp-allowed-transforms", {}, {}); args_parser.parse(arguments); if (options.out_path.is_empty() ^ options.no_output) return Error::from_string_literal("exactly one of -o or --no-output is required"); if (!crop_rect_string.is_empty()) options.crop_rect = TRY(parse_rect_string(crop_rect_string)); if (webp_allowed_transforms != "default"sv) options.webp_allowed_transforms = TRY(parse_webp_allowed_transforms_string(webp_allowed_transforms)); return options; } ErrorOr serenity_main(Main::Arguments arguments) { Options options = TRY(parse_options(arguments)); auto file = TRY(Core::MappedFile::map(options.in_path)); auto decoder = TRY(Gfx::ImageDecoder::try_create_for_raw_bytes(file->bytes())); if (!decoder) return Error::from_string_literal("Could not find decoder for input file"); LoadedImage image = TRY(load_image(*decoder, options.frame_index)); if (options.invert_cmyk) TRY(invert_cmyk(image)); if (options.crop_rect.has_value()) TRY(crop_image(image, options.crop_rect.value())); if (options.move_alpha_to_rgb) TRY(move_alpha_to_rgb(image)); if (options.strip_alpha) TRY(strip_alpha(image)); OwnPtr icc_file; if (!options.assign_color_profile_path.is_empty()) { icc_file = TRY(Core::MappedFile::map(options.assign_color_profile_path)); image.icc_data = icc_file->bytes(); } if (!options.convert_color_profile_path.is_empty()) icc_file = TRY(convert_image_profile(image, options.convert_color_profile_path, move(icc_file))); if (options.strip_color_profile) image.icc_data.clear(); if (options.no_output) return 0; TRY(save_image(image, options.out_path, options.quality, options.webp_allowed_transforms)); return 0; }