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/*
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Forward.h>
#include <LibGfx/Forward.h>
#include <LibGfx/ImageDecoder.h>
namespace Gfx {
// Decoder for the "Quite OK Image" format (v1.0).
// https://qoiformat.org/qoi-specification.pdf
struct [[gnu::packed]] QOIHeader {
char magic[4];
u32 width;
u32 height;
u8 channels;
u8 colorspace;
};
struct QOILoadingContext {
enum class State {
NotDecoded = 0,
HeaderDecoded,
ImageDecoded,
Error,
};
State state { State::NotDecoded };
OwnPtr<Stream> stream {};
QOIHeader header {};
RefPtr<Bitmap> bitmap;
};
class QOIImageDecoderPlugin final : public ImageDecoderPlugin {
public:
static ErrorOr<bool> sniff(ReadonlyBytes);
static ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> create(ReadonlyBytes);
virtual ~QOIImageDecoderPlugin() override = default;
virtual IntSize size() override;
virtual void set_volatile() override;
[[nodiscard]] virtual bool set_nonvolatile(bool& was_purged) override;
virtual bool initialize() override;
virtual bool is_animated() override { return false; }
virtual size_t loop_count() override { return 0; }
virtual size_t frame_count() override { return 1; }
virtual ErrorOr<ImageFrameDescriptor> frame(size_t index) override;
virtual ErrorOr<Optional<ReadonlyBytes>> icc_data() override;
private:
ErrorOr<void> decode_header_and_update_context(Stream&);
ErrorOr<void> decode_image_and_update_context(Stream&);
QOIImageDecoderPlugin(NonnullOwnPtr<Stream>);
OwnPtr<QOILoadingContext> m_context;
};
}
template<>
struct AK::Traits<Gfx::QOIHeader> : public GenericTraits<Gfx::QOIHeader> {
static constexpr bool is_trivially_serializable() { return true; }
};
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