/*

 * Copyright (c) 2020, Hüseyin ASLITÜRK <asliturk@hotmail.com>

 * Copyright (c) 2022, the SerenityOS developers.

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#include "PGMLoader.h"

#include "PortableImageLoaderCommon.h"

namespace Gfx {

ErrorOr<void> read_image_data(PGMLoadingContext& context)

{

    TRY(create_bitmap(context));

    auto& stream = *context.stream;

    auto const context_size = context.width * context.height;

    if (context.type == PGMLoadingContext::Type::ASCII) {

        for (u64 i = 0; i < context_size; ++i) {

            auto value = TRY(read_number(stream));

            TRY(read_whitespace(context));

            Color color { static_cast<u8>(value), static_cast<u8>(value), static_cast<u8>(value) };

            if (context.format_details.max_val < 255)

                color = adjust_color(context.format_details.max_val, color);

            context.bitmap->set_pixel(i % context.width, i / context.width, color);

        }

    } else if (context.type == PGMLoadingContext::Type::RAWBITS) {

        for (u64 i = 0; i < context_size; ++i) {

            auto const pixel = TRY(stream.read_value<u8>());

            context.bitmap->set_pixel(i % context.width, i / context.width, { pixel, pixel, pixel });

        }

    }

    return {};

}

}