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https://github.com/RGBCube/serenity
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f3ff9c26bc
This enum used to store very precise state about the decoding process, let's simplify that by only including two steps: HeaderDecoder and BitmapDecoded.
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
/*
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* Copyright (c) 2020, Hüseyin ASLITÜRK <asliturk@hotmail.com>
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* Copyright (c) 2022, 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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#include "PGMLoader.h"
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#include "PortableImageLoaderCommon.h"
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namespace Gfx {
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ErrorOr<void> read_image_data(PGMLoadingContext& context)
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{
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TRY(create_bitmap(context));
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auto& stream = *context.stream;
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auto const context_size = context.width * context.height;
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if (context.type == PGMLoadingContext::Type::ASCII) {
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for (u64 i = 0; i < context_size; ++i) {
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auto value = TRY(read_number(stream));
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TRY(read_whitespace(context));
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Color color { static_cast<u8>(value), static_cast<u8>(value), static_cast<u8>(value) };
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if (context.format_details.max_val < 255)
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color = adjust_color(context.format_details.max_val, color);
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context.bitmap->set_pixel(i % context.width, i / context.width, color);
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}
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} else if (context.type == PGMLoadingContext::Type::RAWBITS) {
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for (u64 i = 0; i < context_size; ++i) {
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auto const pixel = TRY(stream.read_value<u8>());
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context.bitmap->set_pixel(i % context.width, i / context.width, { pixel, pixel, pixel });
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}
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}
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context.state = PGMLoadingContext::State::BitmapDecoded;
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return {};
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}
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}
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