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ladybird/Userland/Libraries/LibGfx/ImageFormats/PNGLoader.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 *
2021-04-22 01:24:48 -07:00
* 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
*/
SharedGraphics: Implement a simple PNG decoder. This is extremely unoptimized, but it does successfully load "folder32.png" so it must be at least somewhat correct. :^)
2019-03-21 03:57:42 +01:00
#pragma once
LibGfx: Move all image loaders and writers to a subdirectory
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#include <LibGfx/ImageFormats/ImageDecoder.h>
LibGfx: Make unfilter_scanline() a static PNGImageDecoderPlugin method That way, LibPDF will be able to call it. No behavior change.
2023-11-16 19:59:56 -05:00
#include <LibGfx/ImageFormats/PNGShared.h>
SharedGraphics: Implement a simple PNG decoder. This is extremely unoptimized, but it does successfully load "folder32.png" so it must be at least somewhat correct. :^)
2019-03-21 03:57:42 +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: Add ImageLoader, a simple abstraction for image loading An ImageLoader is a generic interface for loading encoded image data of any supported format. It has an ImageLoaderPlugin internally that does all the work. This patch adds an initial PNGImageLoaderPlugin that knows how to retrieve the size of a PNG, and the bitmap. The API is divided into size() and bitmap() to facilitate geometry-only decoding. This will be useful in places like LibHTML where we need dimensions for layout purposes but can wait with the bitmap until later.
2019-10-15 21:48:08 +02:00
struct PNGLoadingContext;
LibDraw: Rename ImageLoader => ImageDecoder ImageLoader was not the right name for this, as there is no loading happening, only decoding. :^)
2019-10-19 19:56:49 +02:00
class PNGImageDecoderPlugin final : public ImageDecoderPlugin {
LibDraw: Add ImageLoader, a simple abstraction for image loading An ImageLoader is a generic interface for loading encoded image data of any supported format. It has an ImageLoaderPlugin internally that does all the work. This patch adds an initial PNGImageLoaderPlugin that knows how to retrieve the size of a PNG, and the bitmap. The API is divided into size() and bitmap() to facilitate geometry-only decoding. This will be useful in places like LibHTML where we need dimensions for layout purposes but can wait with the bitmap until later.
2019-10-15 21:48:08 +02:00
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: Rename ImageLoader => ImageDecoder ImageLoader was not the right name for this, as there is no loading happening, only decoding. :^)
2019-10-19 19:56:49 +02:00
virtual ~PNGImageDecoderPlugin() override;
LibDraw: Add ImageLoader, a simple abstraction for image loading An ImageLoader is a generic interface for loading encoded image data of any supported format. It has an ImageLoaderPlugin internally that does all the work. This patch adds an initial PNGImageLoaderPlugin that knows how to retrieve the size of a PNG, and the bitmap. The API is divided into size() and bitmap() to facilitate geometry-only decoding. This will be useful in places like LibHTML where we need dimensions for layout purposes but can wait with the bitmap until later.
2019-10-15 21:48:08 +02:00
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.
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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.
2023-07-02 22:20:06 +01:00
virtual ErrorOr<ImageFrameDescriptor> frame(size_t index, Optional<IntSize> ideal_size = {}) 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;
LibDraw: Add ImageLoader, a simple abstraction for image loading An ImageLoader is a generic interface for loading encoded image data of any supported format. It has an ImageLoaderPlugin internally that does all the work. This patch adds an initial PNGImageLoaderPlugin that knows how to retrieve the size of a PNG, and the bitmap. The API is divided into size() and bitmap() to facilitate geometry-only decoding. This will be useful in places like LibHTML where we need dimensions for layout purposes but can wait with the bitmap until later.
2019-10-15 21:48:08 +02:00
LibGfx: Make unfilter_scanline() a static PNGImageDecoderPlugin method That way, LibPDF will be able to call it. No behavior change.
2023-11-16 19:59:56 -05:00
static void unfilter_scanline(PNG::FilterType filter, Bytes scanline_data, ReadonlyBytes previous_scanlines_data, u8 bytes_per_complete_pixel);
LibDraw: Add ImageLoader, a simple abstraction for image loading An ImageLoader is a generic interface for loading encoded image data of any supported format. It has an ImageLoaderPlugin internally that does all the work. This patch adds an initial PNGImageLoaderPlugin that knows how to retrieve the size of a PNG, and the bitmap. The API is divided into size() and bitmap() to facilitate geometry-only decoding. This will be useful in places like LibHTML where we need dimensions for layout purposes but can wait with the bitmap until later.
2019-10-15 21:48:08 +02:00
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
PNGImageDecoderPlugin(u8 const*, size_t);
LibGfx/PNG: Add support for animated PNG images
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bool ensure_image_data_chunk_was_decoded();
bool ensure_animation_frame_was_decoded(u32);
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: Add ImageLoader, a simple abstraction for image loading An ImageLoader is a generic interface for loading encoded image data of any supported format. It has an ImageLoaderPlugin internally that does all the work. This patch adds an initial PNGImageLoaderPlugin that knows how to retrieve the size of a PNG, and the bitmap. The API is divided into size() and bitmap() to facilitate geometry-only decoding. This will be useful in places like LibHTML where we need dimensions for layout purposes but can wait with the bitmap until later.
2019-10-15 21:48:08 +02:00
OwnPtr<PNGLoadingContext> 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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