8b71b839fa
This patch adds support for JPEG decoding. The JPEG decoder is capable of handling standard 2x1 horizontal, 2x1 vertical and quartered chroma subsampling. The implemented Inverse DCT performs with a decent speed. As of interchange formats, since we tend to ignore the metadata in APPn markers, the decoder can handle any format compatible with JFIF, which includes EXIFs and sometimes WebMs too. The decoder does not support progressive JPEGs yet.
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibGfx/BMPLoader.h>
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#include <LibGfx/GIFLoader.h>
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#include <LibGfx/ICOLoader.h>
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#include <LibGfx/ImageDecoder.h>
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#include <LibGfx/JPGLoader.h>
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#include <LibGfx/PBMLoader.h>
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#include <LibGfx/PNGLoader.h>
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#include <LibGfx/PPMLoader.h>
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namespace Gfx {
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ImageDecoder::ImageDecoder(const u8* data, size_t size)
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{
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m_plugin = make<PNGImageDecoderPlugin>(data, size);
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if (m_plugin->sniff())
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return;
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m_plugin = make<GIFImageDecoderPlugin>(data, size);
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if (m_plugin->sniff())
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return;
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m_plugin = make<BMPImageDecoderPlugin>(data, size);
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if (m_plugin->sniff())
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return;
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m_plugin = make<PBMImageDecoderPlugin>(data, size);
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if (m_plugin->sniff())
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return;
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m_plugin = make<PPMImageDecoderPlugin>(data, size);
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if (m_plugin->sniff())
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return;
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m_plugin = make<ICOImageDecoderPlugin>(data, size);
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if (m_plugin->sniff())
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return;
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m_plugin = make<JPGImageDecoderPlugin>(data, size);
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if (m_plugin->sniff())
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return;
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m_plugin = nullptr;
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return;
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}
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ImageDecoder::~ImageDecoder()
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{
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}
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RefPtr<Gfx::Bitmap> ImageDecoder::bitmap() const
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{
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if (!m_plugin)
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return nullptr;
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return m_plugin->bitmap();
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}
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}
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