mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 12:32:43 +00:00
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.
55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
/*
|
|
* Copyright (c) 2020, Hüseyin ASLITÜRK <asliturk@hotmail.com>
|
|
* Copyright (c) 2022, the SerenityOS developers.
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include "PBMLoader.h"
|
|
#include "PortableImageLoaderCommon.h"
|
|
|
|
namespace Gfx {
|
|
|
|
ErrorOr<void> read_image_data(PBMLoadingContext& context)
|
|
{
|
|
TRY(create_bitmap(context));
|
|
|
|
auto& stream = *context.stream;
|
|
|
|
auto const context_size = context.width * context.height;
|
|
|
|
if (context.type == PBMLoadingContext::Type::ASCII) {
|
|
for (u64 i = 0; i < context_size; ++i) {
|
|
auto const byte = TRY(stream.read_value<u8>());
|
|
if (byte == '0')
|
|
context.bitmap->set_pixel(i % context.width, i / context.width, Color::White);
|
|
else if (byte == '1')
|
|
context.bitmap->set_pixel(i % context.width, i / context.width, Color::Black);
|
|
else
|
|
i--;
|
|
}
|
|
} else if (context.type == PBMLoadingContext::Type::RAWBITS) {
|
|
for (u64 color_index = 0; color_index < context_size;) {
|
|
auto byte = TRY(stream.read_value<u8>());
|
|
for (int i = 0; i < 8; i++) {
|
|
auto const val = byte & 0x80;
|
|
|
|
if (val == 0)
|
|
context.bitmap->set_pixel(color_index % context.width, color_index / context.width, Color::White);
|
|
else
|
|
context.bitmap->set_pixel(color_index % context.width, color_index / context.width, Color::Black);
|
|
|
|
byte = byte << 1;
|
|
color_index++;
|
|
|
|
if (color_index % context.width == 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
context.state = PBMLoadingContext::State::BitmapDecoded;
|
|
return {};
|
|
}
|
|
}
|