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IFF was a generic container fileformat that was popular on the Amiga since it was the only file format supported by Deluxe Paint. ILBM is an image format popular in the late eighties/nineties that uses the IFF container. This is a very first version of the decoder that only supports (byterun) compressed files with bpp <= 8. Only the minimal chunks are decoded: CMAP, BODY, BMHD. I am planning to add support for the following variants: - EHB (32 colours + lighter 32 colours) - HAM6 / HAM8 (special mode that allowed to display the whole Amiga 4096 colours / 262 144 colours palette) - TrueColor (24bit) Things that could be fun to do: - Still images could be animated using color cycle information
32 lines
811 B
C++
32 lines
811 B
C++
/*
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* Copyright (c) 2023, Nicolas Ramz <nicolas.ramz@gmail.com>
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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 <LibGfx/ImageFormats/ImageDecoder.h>
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namespace Gfx {
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struct ILBMLoadingContext;
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class ILBMImageDecoderPlugin final : public ImageDecoderPlugin {
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public:
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static bool sniff(ReadonlyBytes);
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static ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> create(ReadonlyBytes);
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virtual ~ILBMImageDecoderPlugin() override;
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virtual IntSize size() override;
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virtual ErrorOr<Optional<ReadonlyBytes>> icc_data() override;
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virtual ErrorOr<ImageFrameDescriptor> frame(size_t index, Optional<IntSize> ideal_size = {}) override;
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private:
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ILBMImageDecoderPlugin(ReadonlyBytes, NonnullOwnPtr<ILBMLoadingContext>);
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NonnullOwnPtr<ILBMLoadingContext> m_context;
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};
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}
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