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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
2020-06-15 21:36:05 -04:00
*/
#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
2020-06-15 21:36:05 -04:00
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.
2023-02-26 18:02:50 +00:00
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;
LibGfx: Remove `ImageDecoder::set_[non]volatile()` These methods are unused so let's remove them.
2023-07-07 18:37:46 -04:00
LibGfx: Allow passing an ideal size to image decoders The ideal size is the size the user will display the image. Raster formats should ignore this parameter, but vector formats can use it to generate a bitmap of the ideal size.
2023-07-02 22:20:06 +01:00
virtual ErrorOr<ImageFrameDescriptor> frame(size_t index, Optional<IntSize> ideal_size = {}) 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/ICO: Remove unused parameter
2023-07-19 00:28:17 -04:00
static ErrorOr<void> load_ico_bitmap(ICOLoadingContext& context);
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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