mirror of
https://github.com/fergalmoran/ladybird.git
synced 2025-12-22 09:19:03 +00:00
57e19a7e56
When trying to figure out the correct implementation, we now have a very
strong distinction on plugins that are well suited for sniffing, and
plugins that need a MIME type to be chosen.
Instead of having multiple calls to non-static virtual sniff methods for
each Image decoding plugin, we have 2 static methods for each
implementation:
1. The sniff method, which in contrast to the old method, gets a
ReadonlyBytes parameter and ensures we can figure out the result
with zero heap allocations for most implementations.
2. The create method, which just creates a new instance so we don't
expose the constructor to everyone anymore.
In addition to that, we have a new virtual method called initialize,
which has a per-implementation initialization pattern to actually ensure
each implementation can construct a decoder object, and then have a
correct context being applied to it for the actual decoding.
39 lines
977 B
C++
39 lines
977 B
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <LibGfx/Bitmap.h>
|
|
#include <LibGfx/ImageDecoder.h>
|
|
|
|
namespace Gfx {
|
|
|
|
struct GIFLoadingContext;
|
|
|
|
class GIFImageDecoderPlugin final : public ImageDecoderPlugin {
|
|
public:
|
|
static ErrorOr<bool> sniff(ReadonlyBytes);
|
|
static ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> create(ReadonlyBytes);
|
|
|
|
virtual ~GIFImageDecoderPlugin() override;
|
|
|
|
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;
|
|
virtual size_t loop_count() override;
|
|
virtual size_t frame_count() override;
|
|
virtual ErrorOr<ImageFrameDescriptor> frame(size_t index) override;
|
|
|
|
private:
|
|
GIFImageDecoderPlugin(u8 const*, size_t);
|
|
|
|
OwnPtr<GIFLoadingContext> m_context;
|
|
};
|
|
|
|
}
|