mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 21:32:44 +00:00
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.
32 lines
659 B
C++
32 lines
659 B
C++
/*
|
|
* Copyright (c) 2021, Pierre Hoffmeister
|
|
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Vector.h>
|
|
#include <LibGfx/Forward.h>
|
|
|
|
namespace Gfx {
|
|
|
|
class PNGChunk;
|
|
|
|
class PNGWriter {
|
|
public:
|
|
static ByteBuffer encode(Gfx::Bitmap const&);
|
|
|
|
private:
|
|
PNGWriter() { }
|
|
|
|
Vector<u8> m_data;
|
|
void add_chunk(PNGChunk&);
|
|
void add_png_header();
|
|
void add_IHDR_chunk(u32 width, u32 height, u8 bit_depth, u8 color_type, u8 compression_method, u8 filter_method, u8 interlace_method);
|
|
void add_IDAT_chunk(Gfx::Bitmap const&);
|
|
void add_IEND_chunk();
|
|
};
|
|
|
|
}
|