mirror of
https://github.com/RGBCube/serenity
synced 2025-05-19 22:25:07 +00:00
6cf8eeb7a4
Nobody made use of the ErrorOr return value and it just added more chance of confusion, since it was not clear if failing to sniff an image should return an error or false. The answer was false, if you returned Error you'd crash the ImageDecoder.
70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
/*
|
|
* 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 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; }
|
|
};
|