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

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Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
2020-01-18 09:38:21 +01:00
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
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
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
2020-01-18 09:38:21 +01:00
*/
LibDraw: Start work on a GIF decoder (not yet functional!) Here comes the first part of a GIF decoder. It decodes up to the point of gathering all the LZW-compressed data. The next step is to implement decompression, and then turn the decompressed data into a bitmap using the color maps, etc.
2019-11-23 16:48:28 +01:00
#pragma once
LibGfx/GIF: Only use a `FixedMemoryStream` This allows us to drop the data pointer in the `GIFLoadingContext`.
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#include <AK/MemoryStream.h>
LibGfx: Rename GraphicsBitmap.{cpp,h} => Bitmap.{cpp,h}
2020-02-06 12:07:05 +01:00
#include <LibGfx/Bitmap.h>
LibGfx: Move all image loaders and writers to a subdirectory
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#include <LibGfx/ImageFormats/ImageDecoder.h>
LibDraw: Start work on a GIF decoder (not yet functional!) Here comes the first part of a GIF decoder. It decodes up to the point of gathering all the LZW-compressed data. The next step is to implement decompression, and then turn the decompressed data into a bitmap using the color maps, etc.
2019-11-23 16:48:28 +01:00
LibDraw: Put all classes in the Gfx namespace I started adding things to a Draw namespace, but it somehow felt really wrong seeing Draw::Rect and Draw::Bitmap, etc. So instead, let's rename the library to LibGfx. :^)
2020-02-06 11:56:38 +01:00
namespace Gfx {
LibDraw: Start work on a GIF decoder (not yet functional!) Here comes the first part of a GIF decoder. It decodes up to the point of gathering all the LZW-compressed data. The next step is to implement decompression, and then turn the decompressed data into a bitmap using the color maps, etc.
2019-11-23 16:48:28 +01:00
struct GIFLoadingContext;
class GIFImageDecoderPlugin 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.
2023-01-20 10:13:14 +02:00
static ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> create(ReadonlyBytes);
LibDraw: Start work on a GIF decoder (not yet functional!) Here comes the first part of a GIF decoder. It decodes up to the point of gathering all the LZW-compressed data. The next step is to implement decompression, and then turn the decompressed data into a bitmap using the color maps, etc.
2019-11-23 16:48:28 +01:00
virtual ~GIFImageDecoderPlugin() override;
LibGfx: Rename Rect,Point,Size => IntRect,IntPoint,IntSize This fits nicer with FloatRect,FloatPoint,FloatSize and gives a much better visual clue about what type of metric is being used.
2020-06-10 10:57:59 +02:00
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: Add support for animated images to ImageDecoder{Plugin} Adds methods to determine whether an image is animated, how many times the animation loops, the number of frames, and to get individual frames. Implements stubs of these methods for PNGImageDecoderPlugin and GIFImageDecoderPlugin.
2020-05-03 17:12:54 +01:00
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: 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.
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virtual ErrorOr<ImageFrameDescriptor> frame(size_t index, Optional<IntSize> ideal_size = {}) override;
LibDraw: Start work on a GIF decoder (not yet functional!) Here comes the first part of a GIF decoder. It decodes up to the point of gathering all the LZW-compressed data. The next step is to implement decompression, and then turn the decompressed data into a bitmap using the color maps, etc.
2019-11-23 16:48:28 +01:00
private:
LibGfx/GIF: Only use a `FixedMemoryStream` This allows us to drop the data pointer in the `GIFLoadingContext`.
2023-07-14 17:45:19 -04:00
GIFImageDecoderPlugin(FixedMemoryStream);
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
LibDraw: Start work on a GIF decoder (not yet functional!) Here comes the first part of a GIF decoder. It decodes up to the point of gathering all the LZW-compressed data. The next step is to implement decompression, and then turn the decompressed data into a bitmap using the color maps, etc.
2019-11-23 16:48:28 +01:00
OwnPtr<GIFLoadingContext> m_context;
};
LibDraw: Put all classes in the Gfx namespace I started adding things to a Draw namespace, but it somehow felt really wrong seeing Draw::Rect and Draw::Bitmap, etc. So instead, let's rename the library to LibGfx. :^)
2020-02-06 11:56:38 +01:00
}
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