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b70f2b00a3
Before this change PNGWriter::add_chunk used to make a copy of PNGChunk's ByteBuffer to prepend the size of the data. With this change, 4-byte space is saved from the beginning and written at the end of the operation. Avoiding this copy yields significant speed up.
33 lines
659 B
C++
33 lines
659 B
C++
/*
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* Copyright (c) 2021, Pierre Hoffmeister
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Vector.h>
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#include <LibGfx/Forward.h>
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namespace Gfx {
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class PNGChunk;
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class PNGWriter {
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public:
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static ByteBuffer encode(Gfx::Bitmap const&);
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private:
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PNGWriter() { }
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Vector<u8> m_data;
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void add_chunk(PNGChunk&);
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void add_png_header();
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void add_IHDR_chunk(u32 width, u32 height, u8 bit_depth, u8 color_type, u8 compression_method, u8 filter_method, u8 interlace_method);
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void add_IDAT_chunk(Gfx::Bitmap const&);
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void add_IEND_chunk();
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};
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}
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