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ladybird/Userland/Libraries/LibGfx/ImageFormats/ICOLoader.h

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LibGfx: Initial support for ICO image files. This adds support for loading the first image from ICO format images only if they are PNG encoded. This is useful for loading favicons, which are sometimes PNGs with an ICO extension and sometimes actual ICO files. In particular we can now load the favicon from new.ycombinator.com
2020-06-15 21:36:05 -04:00
/*
* Copyright (c) 2020, Paul Roukema <roukemap@gmail.com>
*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
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* SPDX-License-Identifier: BSD-2-Clause
LibGfx: Initial support for ICO image files. This adds support for loading the first image from ICO format images only if they are PNG encoded. This is useful for loading favicons, which are sometimes PNGs with an ICO extension and sometimes actual ICO files. In particular we can now load the favicon from new.ycombinator.com
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*/
#pragma once
LibGfx: Move all image loaders and writers to a subdirectory
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#include <LibGfx/ImageFormats/ImageDecoder.h>
LibGfx: Initial support for ICO image files. This adds support for loading the first image from ICO format images only if they are PNG encoded. This is useful for loading favicons, which are sometimes PNGs with an ICO extension and sometimes actual ICO files. In particular we can now load the favicon from new.ycombinator.com
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namespace Gfx {
struct ICOLoadingContext;
class ICOImageDecoderPlugin final : public ImageDecoderPlugin {
public:
LibGfx: Return bool not ErrorOr<bool> from ImageDecoderPlugin::sniff() 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.
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static bool sniff(ReadonlyBytes);
LibGfx: Re-structure the whole initialization pattern for image decoders 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.
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static ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> create(ReadonlyBytes);
LibGfx: Initial support for ICO image files. This adds support for loading the first image from ICO format images only if they are PNG encoded. This is useful for loading favicons, which are sometimes PNGs with an ICO extension and sometimes actual ICO files. In particular we can now load the favicon from new.ycombinator.com
2020-06-15 21:36:05 -04:00
virtual ~ICOImageDecoderPlugin() override;
virtual IntSize size() override;
virtual void set_volatile() override;
LibGfx: Make Gfx::Bitmap::set_nonvolatile() report allocation failure Making a bitmap non-volatile after being volatile may fail to allocate physical pages after the kernel stole the old pages in a purge. This is different from the pages being purged, but reallocated. In that case, they are simply replaced with zero-fill-on-demand pages as if they were freshly allocated.
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[[nodiscard]] virtual bool set_nonvolatile(bool& was_purged) override;
LibGfx+Fuzz: Convert ImageDecoder::initialize to ErrorOr This prevents callers from accidentally discarding the result of initialize(), which was the root cause of this OSS Fuzz bug: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=55896&q=label%3AProj-serenity&sort=summary
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virtual ErrorOr<void> initialize() override;
LibGfx: Initial support for ICO image files. This adds support for loading the first image from ICO format images only if they are PNG encoded. This is useful for loading favicons, which are sometimes PNGs with an ICO extension and sometimes actual ICO files. In particular we can now load the favicon from new.ycombinator.com
2020-06-15 21:36:05 -04:00
virtual bool is_animated() override;
virtual size_t loop_count() override;
virtual size_t frame_count() override;
LibGfx: Add first_animated_frame_index method to ImageDecoder Some image formats such as APNG may not use the first frame for animations.
2023-04-07 20:41:22 -06:00
virtual size_t first_animated_frame_index() override;
LibGfx: Make ImageDecoderPlugin::frame() return ErrorOr<> This is a first step towards better error propagation from image codecs.
2021-11-20 14:29:33 +01:00
virtual ErrorOr<ImageFrameDescriptor> frame(size_t index) override;
LibGfx: Add a method to ImageDecoderPlugin for reading ICC data This probably won't be the final API for getting color spaces from images, since some formats just store an "is sRGB?" flag instead of a full profile. Instead, once everything works, we probably want to give every Bitmap a pointer to some color space abstraction. But we can always change this later, once things are further along and better understood.
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virtual ErrorOr<Optional<ReadonlyBytes>> icc_data() override;
LibGfx: Initial support for ICO image files. This adds support for loading the first image from ICO format images only if they are PNG encoded. This is useful for loading favicons, which are sometimes PNGs with an ICO extension and sometimes actual ICO files. In particular we can now load the favicon from new.ycombinator.com
2020-06-15 21:36:05 -04:00
private:
LibGfx: Re-structure the whole initialization pattern for image decoders 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.
2023-01-20 10:13:14 +02:00
ICOImageDecoderPlugin(u8 const*, size_t);
LibGfx: Return ErrorOr<> in ICOLoader internal functions
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static ErrorOr<void> load_ico_bitmap(ICOLoadingContext& context, Optional<size_t> index);
LibGfx: Re-structure the whole initialization pattern for image decoders 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.
2023-01-20 10:13:14 +02:00
LibGfx: Initial support for ICO image files. This adds support for loading the first image from ICO format images only if they are PNG encoded. This is useful for loading favicons, which are sometimes PNGs with an ICO extension and sometimes actual ICO files. In particular we can now load the favicon from new.ycombinator.com
2020-06-15 21:36:05 -04:00
OwnPtr<ICOLoadingContext> m_context;
};
}
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