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LibGfx: Add a simple GrayscaleBitmap class

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This is very similar to the existing CharacterBitmap class but instead
intended for small static grayscale bitmaps (such as signed distance
fields).
This commit is contained in:
MacDue 2023-03-23 00:22:00 +01:00 committed by Sam Atkins
parent 87b8a36e56
commit 429d7b002b
Notes: sideshowbarker 2024-07-17 02:21:14 +09:00 
Author: https://github.com/MacDue
Commit: https://github.com/SerenityOS/serenity/commit/429d7b002b
Pull-request: https://github.com/SerenityOS/serenity/pull/17933
Reviewed-by: https://github.com/AtkinsSJ ✅
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/gmta
Reviewed-by: https://github.com/srikavin
1 changed files with 38 additions and 0 deletions
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38
Userland/Libraries/LibGfx/GrayscaleBitmap.h Normal file
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/*
* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "Size.h"
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <AK/StringView.h>
namespace Gfx {
class GrayscaleBitmap {
public:
GrayscaleBitmap() = delete;
constexpr GrayscaleBitmap(ReadonlyBytes data, unsigned width, unsigned height)
: m_data(data)
, m_size(width, height)
{
VERIFY(width * height == data.size());
}
constexpr u8 pixel_at(unsigned x, unsigned y) const { return m_data[y * width() + x]; }
constexpr ReadonlyBytes data() const { return m_data; }
constexpr IntSize size() const { return m_size; }
constexpr unsigned width() const { return m_size.width(); }
constexpr unsigned height() const { return m_size.height(); }
private:
ReadonlyBytes m_data {};
IntSize m_size {};
};
}