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LibGfx: Comment ImageDecoderPlugin's interface
This is done as an effort to unify the behavior of every plugin. See #19893 for more details.
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1 changed files with 10 additions and 1 deletions
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@ -35,10 +35,19 @@ class ImageDecoderPlugin {
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public:
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virtual ~ImageDecoderPlugin() = default;
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// Each plugin should implement these static functions and register them in ImageDecoder.cpp
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// Implement sniff() if the file includes a magic number
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// static bool sniff(ReadonlyBytes);
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// Implement validate_before_create() otherwise
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// static ErrorOr<bool> validate_before_create(ReadonlyBytes);
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// This function should be used to both create the context and parse the image header.
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// static ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> create(ReadonlyBytes);
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// This should always be available as gathered in create()
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virtual IntSize size() = 0;
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virtual bool is_animated() = 0;
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virtual size_t loop_count() = 0;
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virtual size_t frame_count() = 0;
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virtual size_t first_animated_frame_index() = 0;
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