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83ab9f7c2d
This is already done at the caller decode() in PortableImageLoaderCommon.h, as pointed out by @LucasChollet at https://github.com/SerenityOS/serenity/pull/22935#discussion_r1467158789 No behavior change.
62 lines
2.7 KiB
C++
62 lines
2.7 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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#include "PAMLoader.h"
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#include "PortableImageLoaderCommon.h"
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namespace Gfx {
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ErrorOr<void> read_image_data(PAMLoadingContext& context)
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{
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VERIFY(context.type == PAMLoadingContext::Type::RAWBITS);
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// FIXME: Technically it's more to spec to check that a known tupl type has a minimum depth and then skip additional channels.
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bool is_gray = context.format_details.depth == 1 && context.format_details.tupl_type == "GRAYSCALE"sv;
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bool is_gray_alpha = context.format_details.depth == 2 && context.format_details.tupl_type == "GRAYSCALE_ALPHA"sv;
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bool is_rgb = context.format_details.depth == 3 && context.format_details.tupl_type == "RGB"sv;
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bool is_rgba = context.format_details.depth == 4 && context.format_details.tupl_type == "RGB_ALPHA"sv;
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bool is_cmyk = context.format_details.depth == 4 && context.format_details.tupl_type == "CMYK"sv;
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if (!is_gray && !is_gray_alpha && !is_rgb && !is_rgba && !is_cmyk)
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return Error::from_string_view("Unsupported PAM depth"sv);
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auto& stream = *context.stream;
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if (is_cmyk) {
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context.format_details.cmyk_bitmap = TRY(CMYKBitmap::create_with_size({ context.width, context.height }));
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CMYK* data = context.format_details.cmyk_bitmap.value()->begin();
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for (u64 i = 0; i < context.width * context.height; ++i) {
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Array<u8, 4> pixel;
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TRY(stream.read_until_filled(pixel));
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data[i] = { pixel[0], pixel[1], pixel[2], pixel[3] };
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}
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} else {
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TRY(create_bitmap(context));
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for (u64 i = 0; i < context.width * context.height; ++i) {
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if (is_gray) {
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Array<u8, 1> pixel;
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TRY(stream.read_until_filled(pixel));
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context.bitmap->set_pixel(i % context.width, i / context.width, { pixel[0], pixel[0], pixel[0] });
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} else if (is_gray_alpha) {
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Array<u8, 2> pixel;
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TRY(stream.read_until_filled(pixel));
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context.bitmap->set_pixel(i % context.width, i / context.width, { pixel[0], pixel[0], pixel[0], pixel[1] });
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} else if (is_rgb) {
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Array<u8, 3> pixel;
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TRY(stream.read_until_filled(pixel));
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context.bitmap->set_pixel(i % context.width, i / context.width, { pixel[0], pixel[1], pixel[2] });
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} else if (is_rgba) {
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Array<u8, 4> pixel;
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TRY(stream.read_until_filled(pixel));
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context.bitmap->set_pixel(i % context.width, i / context.width, { pixel[0], pixel[1], pixel[2], pixel[3] });
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}
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}
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}
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return {};
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}
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}
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