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ladybird/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h

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Meta: Add missing copyright headers
2020-04-06 11:09:01 +02:00
/*
LibWeb: Add CanvasRenderingContext2D.bezierCurveTo()
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* Copyright (c) 2020-2022, Andreas Kling <kling@serenityos.org>
LibWeb: Implement CanvasRenderingContext2D.drawImage() closer to spec Also add support for HTMLCanvasElement for the image parameter, leading to replacing HTMLImageElement with the CanvasImageSource Variant type. Also stub out the 'check the usability of the image argument' and 'is not origin-clean' operations, while taking into consideration that these can throw (and require DOM::ExceptionOr).
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* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
Meta: Add missing copyright headers
2020-04-06 11:09:01 +02:00
*
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 missing copyright headers
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*/
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
#pragma once
LibWeb: Make canvas text preparation handle multi-code point glyphs
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#include <AK/String.h>
LibWeb: Implement CanvasRenderingContext2D.drawImage() closer to spec Also add support for HTMLCanvasElement for the image parameter, leading to replacing HTMLImageElement with the CanvasImageSource Variant type. Also stub out the 'check the usability of the image argument' and 'is not origin-clean' operations, while taking into consideration that these can throw (and require DOM::ExceptionOr).
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#include <AK/Variant.h>
LibWeb: Use an AffineTransform for CanvasRenderingContext2D :^) This will allow us to support complex 2D transforms.
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#include <LibGfx/AffineTransform.h>
LibWeb: Use AntiAliasingPainter for canvas painting
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#include <LibGfx/AntiAliasingPainter.h>
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
#include <LibGfx/Color.h>
#include <LibGfx/Forward.h>
LibWeb: Add canvas.fill This implements only one of the two forms of this function, ctx.fill(winding_rule). Also tweaks the quadratic curve demo to have a nice looking filled shape.
2020-05-06 11:56:47 +04:30
#include <LibGfx/Painter.h>
LibWeb: Add some basic path drawing functionality to the canvas element This patch adds the following methods to CanvasRenderingContext2D: - beginPath() - moveTo(x, y) - lineTo(x, y) - closePath() - stroke() We also add the lineWidth property. :^)
2020-04-16 21:06:03 +02:00
#include <LibGfx/Path.h>
LibWeb: Make 2D and 3D canvas rendering contexts GC-allocated
2022-09-02 15:53:02 +02:00
#include <LibWeb/Bindings/PlatformObject.h>
LibWeb: Add initial implementation of CRC2D.globalAlpha Works for fills and strokes (using colors, gradients, or patterns), along with images. fill_rect() has been updated to use fill_path(), which allows it to easily transform the rect, and already supports opacity. Co-authored-by: MacDue <macdue@dueutil.tech>
2023-05-19 22:42:47 +02:00
#include <LibWeb/HTML/Canvas/CanvasCompositing.h>
LibWeb: Extract CanvasDrawImage class from CRC2D
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#include <LibWeb/HTML/Canvas/CanvasDrawImage.h>
LibWeb: Extract CanvasDrawPath class from CRC2D Again, this is an entirely virtual class since the methods involve direct access to the Painter. Though, maybe I could just expose the Painter...
2022-08-12 16:52:17 +01:00
#include <LibWeb/HTML/Canvas/CanvasDrawPath.h>
LibWeb: Extract CanvasFillStrokeStyles class from CRC2D
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#include <LibWeb/HTML/Canvas/CanvasFillStrokeStyles.h>
LibWeb: Extract CanvasImageData class from CRC2D
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#include <LibWeb/HTML/Canvas/CanvasImageData.h>
LibWeb: Implement CRC2D.imageSmoothingEnabled We now select between nearest neighbor and bilinear filtering when scaling images in CRC2D.drawImage(). This patch also adds CRC2D.imageSmoothingQuality but it's ignored for now as we don't have a bunch of different quality levels to map it to. Work towards #17993 (Ruffle Flash Player)
2023-03-29 18:35:02 +02:00
#include <LibWeb/HTML/Canvas/CanvasImageSmoothing.h>
LibWeb: Extract CanvasPath class from CRC2D This better matches the spec, and makes it possible for things like Path2D to reuse the same implementation without duplicate code. :^)
2022-08-11 16:10:04 +01:00
#include <LibWeb/HTML/Canvas/CanvasPath.h>
LibWeb: Add initial implementation of CRC2D.clip() This allows clipping your drawing by any path you like! To do this all painting has been wrapped around a new draw_clipped() helper method, which handles the clipping before/after painting. Note: This clipping is currently missing support for intersecting clip paths.
2023-04-06 20:57:59 +01:00
#include <LibWeb/HTML/Canvas/CanvasPathClipper.h>
LibWeb: Extract CanvasPathDrawingStyles class from CRC2D
2022-08-12 17:43:37 +01:00
#include <LibWeb/HTML/Canvas/CanvasPathDrawingStyles.h>
LibWeb: Extract CanvasRect class from CRC2D This one requires drawing to the canvas, so it doesn't make so much sense to move the implementation over.
2022-08-12 16:06:32 +01:00
#include <LibWeb/HTML/Canvas/CanvasRect.h>
LibWeb: Extract CanvasState class from CRC2D As with CanvasPath, this is to better match the spec IDL.
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#include <LibWeb/HTML/Canvas/CanvasState.h>
LibWeb: Extract CanvasText class from CRC2D
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#include <LibWeb/HTML/Canvas/CanvasText.h>
LibWeb: Extract CanvasTransform class from CRC2D The implementation of this got a little funky, because it has to access methods from CanvasState.
2022-08-12 14:48:11 +01:00
#include <LibWeb/HTML/Canvas/CanvasTransform.h>
LibWeb: Add barebones CanvasGradient object Also add the CanvasRenderingContext2D APIs to go along with it. Note that it can't be used for anything yet.
2022-02-03 20:08:27 +01:00
#include <LibWeb/HTML/CanvasGradient.h>
LibWeb: Implement CanvasRenderingContext2D.measureText This requires an implementation of the "text preparation algorithm" as specified here: html.spec.whatwg.org/multipage/canvas.html#text-preparation-algorithm However, we're missing a lot of things such as the CanvasTextDrawingStyles interface, so most of the algorithm was not implemented. Additionally, we also are not able to use a LineBox like the algorithm suggests, because our layouting infra is not up to the task yet. The prepare_text function does nothing other than figuring out the width of the given text and return glyphs with offsets at the moment.
2021-12-30 22:15:38 +00:00
#include <LibWeb/Layout/InlineNode.h>
#include <LibWeb/Layout/LineBox.h>
LibWeb: Move ExceptionOr from DOM/ to WebIDL/ This is a concept fully defined in the Web IDL spec and doesn't belong in the DOM directory/namespace - not even DOMException, despite the name :^)
2022-09-25 17:03:42 +01:00
#include <LibWeb/WebIDL/ExceptionOr.h>
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
LibWeb: Move HTML classes into the Web::HTML namespace
2020-07-28 18:20:36 +02:00
namespace Web::HTML {
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
LibWeb: Implement CanvasRenderingContext2D.drawImage() closer to spec Also add support for HTMLCanvasElement for the image parameter, leading to replacing HTMLImageElement with the CanvasImageSource Variant type. Also stub out the 'check the usability of the image argument' and 'is not origin-clean' operations, while taking into consideration that these can throw (and require DOM::ExceptionOr).
2022-03-04 19:02:10 +01:00
// https://html.spec.whatwg.org/multipage/canvas.html#canvasimagesource
// NOTE: This is the Variant created by the IDL wrapper generator, and needs to be updated accordingly.
LibWeb+LibJS: Make the EventTarget hierarchy (incl. DOM) GC-allocated This is a monster patch that turns all EventTargets into GC-allocated PlatformObjects. Their C++ wrapper classes are removed, and the LibJS garbage collector is now responsible for their lifetimes. There's a fair amount of hacks and band-aids in this patch, and we'll have a lot of cleanup to do after this.
2022-08-28 13:42:07 +02:00
using CanvasImageSource = Variant<JS::Handle<HTMLImageElement>, JS::Handle<HTMLCanvasElement>>;
LibWeb: Implement CanvasRenderingContext2D.drawImage() closer to spec Also add support for HTMLCanvasElement for the image parameter, leading to replacing HTMLImageElement with the CanvasImageSource Variant type. Also stub out the 'check the usability of the image argument' and 'is not origin-clean' operations, while taking into consideration that these can throw (and require DOM::ExceptionOr).
2022-03-04 19:02:10 +01:00
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
class CanvasRenderingContext2D
LibWeb: Make 2D and 3D canvas rendering contexts GC-allocated
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: public Bindings::PlatformObject
LibWeb: Extract CanvasState class from CRC2D As with CanvasPath, this is to better match the spec IDL.
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, public CanvasPath
LibWeb: Extract CanvasTransform class from CRC2D The implementation of this got a little funky, because it has to access methods from CanvasState.
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, public CanvasState
LibWeb: Extract CanvasFillStrokeStyles class from CRC2D
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, public CanvasTransform<CanvasRenderingContext2D>
LibWeb: Extract CanvasRect class from CRC2D This one requires drawing to the canvas, so it doesn't make so much sense to move the implementation over.
2022-08-12 16:06:32 +01:00
, public CanvasFillStrokeStyles<CanvasRenderingContext2D>
LibWeb: Extract CanvasDrawPath class from CRC2D Again, this is an entirely virtual class since the methods involve direct access to the Painter. Though, maybe I could just expose the Painter...
2022-08-12 16:52:17 +01:00
, public CanvasRect
LibWeb: Extract CanvasText class from CRC2D
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, public CanvasDrawPath
LibWeb: Extract CanvasDrawImage class from CRC2D
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, public CanvasText
LibWeb: Extract CanvasImageData class from CRC2D
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, public CanvasDrawImage
LibWeb: Extract CanvasPathDrawingStyles class from CRC2D
2022-08-12 17:43:37 +01:00
, public CanvasImageData
LibWeb: Implement CRC2D.imageSmoothingEnabled We now select between nearest neighbor and bilinear filtering when scaling images in CRC2D.drawImage(). This patch also adds CRC2D.imageSmoothingQuality but it's ignored for now as we don't have a bunch of different quality levels to map it to. Work towards #17993 (Ruffle Flash Player)
2023-03-29 18:35:02 +02:00
, public CanvasImageSmoothing
LibWeb: Add initial implementation of CRC2D.globalAlpha Works for fills and strokes (using colors, gradients, or patterns), along with images. fill_rect() has been updated to use fill_path(), which allows it to easily transform the rect, and already supports opacity. Co-authored-by: MacDue <macdue@dueutil.tech>
2023-05-19 22:42:47 +02:00
, public CanvasCompositing
LibWeb: Extract CanvasPathDrawingStyles class from CRC2D
2022-08-12 17:43:37 +01:00
, public CanvasPathDrawingStyles<CanvasRenderingContext2D> {
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
LibWeb: Make 2D and 3D canvas rendering contexts GC-allocated
2022-09-02 15:53:02 +02:00
WEB_PLATFORM_OBJECT(CanvasRenderingContext2D, Bindings::PlatformObject);
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
public:
LibWeb: Make factory method of HTML::CanvasRenderingContext2D fallible
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static WebIDL::ExceptionOr<JS::NonnullGCPtr<CanvasRenderingContext2D>> create(JS::Realm&, HTMLCanvasElement&);
LibWeb: Make 2D and 3D canvas rendering contexts GC-allocated
2022-09-02 15:53:02 +02:00
virtual ~CanvasRenderingContext2D() override;
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
LibWeb: Extract CanvasRect class from CRC2D This one requires drawing to the canvas, so it doesn't make so much sense to move the implementation over.
2022-08-12 16:06:32 +01:00
virtual void fill_rect(float x, float y, float width, float height) override;
virtual void stroke_rect(float x, float y, float width, float height) override;
virtual void clear_rect(float x, float y, float width, float height) override;
LibWeb: Add CanvasRenderingContext2D.drawImage(image, x, y) This function allows you to draw a loaded <img> element into a canvas.
2020-04-14 20:38:44 +02:00
LibWeb: Move ExceptionOr from DOM/ to WebIDL/ This is a concept fully defined in the Web IDL spec and doesn't belong in the DOM directory/namespace - not even DOMException, despite the name :^)
2022-09-25 17:03:42 +01:00
virtual WebIDL::ExceptionOr<void> draw_image_internal(CanvasImageSource const&, float source_x, float source_y, float source_width, float source_height, float destination_x, float destination_y, float destination_width, float destination_height) override;
LibWeb: Add CanvasRenderingContext2D.drawImage(image, x, y) This function allows you to draw a loaded <img> element into a canvas.
2020-04-14 20:38:44 +02:00
LibWeb: Extract CanvasDrawPath class from CRC2D Again, this is an entirely virtual class since the methods involve direct access to the Painter. Though, maybe I could just expose the Painter...
2022-08-12 16:52:17 +01:00
virtual void begin_path() override;
virtual void stroke() override;
virtual void stroke(Path2D const& path) override;
LibWeb: Generate CanvasRenderingContext2D bindings from IDL :^) We're still missing optional argument support, so this implementation doesn't support fill(), only fill(fill_rule). Still it's really nice to get rid of so much hand-written wrapper code.
2020-06-22 18:39:22 +02:00
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
virtual void fill_text(DeprecatedString const&, float x, float y, Optional<double> max_width) override;
virtual void stroke_text(DeprecatedString const&, float x, float y, Optional<double> max_width) override;
LibWeb: Add a naive implemention of CanvasRenderingContext2D::fill_text This doesnt actually account for several unimplemented attributes (like ltr/rtl, alignment, etc) yet, so this should be expanded in the future.
2021-04-15 20:36:10 +03:00
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
virtual void fill(DeprecatedString const& fill_rule) override;
virtual void fill(Path2D& path, DeprecatedString const& fill_rule) override;
LibWeb: Add some basic path drawing functionality to the canvas element This patch adds the following methods to CanvasRenderingContext2D: - beginPath() - moveTo(x, y) - lineTo(x, y) - closePath() - stroke() We also add the lineWidth property. :^)
2020-04-16 21:06:03 +02:00
LibWeb: Make ImageData GC-allocated
2022-09-02 23:07:05 +02:00
virtual JS::GCPtr<ImageData> create_image_data(int width, int height) const override;
LibWeb: Move ExceptionOr from DOM/ to WebIDL/ This is a concept fully defined in the Web IDL spec and doesn't belong in the DOM directory/namespace - not even DOMException, despite the name :^)
2022-09-25 17:03:42 +01:00
virtual WebIDL::ExceptionOr<JS::GCPtr<ImageData>> get_image_data(int x, int y, int width, int height) const override;
LibWeb: Extract CanvasImageData class from CRC2D
2022-08-12 17:37:09 +01:00
virtual void put_image_data(ImageData const&, float x, float y) override;
LibWeb: Add ImageData objects and implement 2D context putImageData() An ImageData is a wrapper around a Bitmap wrapper around a JS::Uint8ClampedArray.
2020-04-21 23:49:51 +02:00
LibWeb: Extract CanvasState class from CRC2D As with CanvasPath, this is to better match the spec IDL.
2022-08-12 14:00:00 +01:00
virtual void reset_to_default_state() override;
LibWeb: Implement CanvasRenderingContext2D.save()
2021-12-27 14:31:23 +01:00
LibWeb+LibJS: Make the EventTarget hierarchy (incl. DOM) GC-allocated This is a monster patch that turns all EventTargets into GC-allocated PlatformObjects. Their C++ wrapper classes are removed, and the LibJS garbage collector is now responsible for their lifetimes. There's a fair amount of hacks and band-aids in this patch, and we'll have a lot of cleanup to do after this.
2022-08-28 13:42:07 +02:00
JS::NonnullGCPtr<HTMLCanvasElement> canvas_for_binding() const;
LibWeb: Add CanvasRenderingContext2D.canvas
2020-05-21 00:09:31 +01:00
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
virtual JS::NonnullGCPtr<TextMetrics> measure_text(DeprecatedString const& text) override;
LibWeb: Implement CanvasRenderingContext2D.measureText This requires an implementation of the "text preparation algorithm" as specified here: html.spec.whatwg.org/multipage/canvas.html#text-preparation-algorithm However, we're missing a lot of things such as the CanvasTextDrawingStyles interface, so most of the algorithm was not implemented. Additionally, we also are not able to use a LineBox like the algorithm suggests, because our layouting infra is not up to the task yet. The prepare_text function does nothing other than figuring out the width of the given text and return glyphs with offsets at the moment.
2021-12-30 22:15:38 +00:00
LibWeb: Add initial implementation of CRC2D.clip() This allows clipping your drawing by any path you like! To do this all painting has been wrapped around a new draw_clipped() helper method, which handles the clipping before/after painting. Note: This clipping is currently missing support for intersecting clip paths.
2023-04-06 20:57:59 +01:00
virtual void clip(DeprecatedString const& fill_rule) override;
virtual void clip(Path2D& path, DeprecatedString const& fill_rule) override;
LibWeb: Implement CanvasRenderingContext2D.transform
2022-04-10 18:46:04 +01:00
LibWeb: Implement CRC2D.imageSmoothingEnabled We now select between nearest neighbor and bilinear filtering when scaling images in CRC2D.drawImage(). This patch also adds CRC2D.imageSmoothingQuality but it's ignored for now as we don't have a bunch of different quality levels to map it to. Work towards #17993 (Ruffle Flash Player)
2023-03-29 18:35:02 +02:00
virtual bool image_smoothing_enabled() const override;
virtual void set_image_smoothing_enabled(bool) override;
virtual Bindings::ImageSmoothingQuality image_smoothing_quality() const override;
virtual void set_image_smoothing_quality(Bindings::ImageSmoothingQuality) override;
LibWeb: Add initial implementation of CRC2D.globalAlpha Works for fills and strokes (using colors, gradients, or patterns), along with images. fill_rect() has been updated to use fill_path(), which allows it to easily transform the rect, and already supports opacity. Co-authored-by: MacDue <macdue@dueutil.tech>
2023-05-19 22:42:47 +02:00
virtual float global_alpha() const override;
virtual void set_global_alpha(float) override;
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
private:
LibWeb: Remove unecessary dependence on Window from HTML classes These classes only needed Window to get at its realm. Pass a realm directly to construct HTML classes.
2022-09-25 16:38:21 -06:00
explicit CanvasRenderingContext2D(JS::Realm&, HTMLCanvasElement&);
LibWeb: Make 2D and 3D canvas rendering contexts GC-allocated
2022-09-02 15:53:02 +02:00
LibJS+Everywhere: Allow Cell::initialize overrides to throw OOM errors Note that as of this commit, there aren't any such throwers, and the call site in Heap::allocate will drop exceptions on the floor. This commit only serves to change the declaration of the overrides, make sure they return an empty value, and to propagate OOM errors frm their base initialize invocations.
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virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
LibWeb: Make 2D and 3D canvas rendering contexts GC-allocated
2022-09-02 15:53:02 +02:00
virtual void visit_edges(Cell::Visitor&) override;
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
LibWeb: Implement CanvasRenderingContext2D.measureText This requires an implementation of the "text preparation algorithm" as specified here: html.spec.whatwg.org/multipage/canvas.html#text-preparation-algorithm However, we're missing a lot of things such as the CanvasTextDrawingStyles interface, so most of the algorithm was not implemented. Additionally, we also are not able to use a LineBox like the algorithm suggests, because our layouting infra is not up to the task yet. The prepare_text function does nothing other than figuring out the width of the given text and return glyphs with offsets at the moment.
2021-12-30 22:15:38 +00:00
struct PreparedTextGlyph {
LibWeb: Make canvas text preparation handle multi-code point glyphs
2023-02-22 11:48:05 -05:00
String glyph;
LibWeb: Implement CanvasRenderingContext2D.measureText This requires an implementation of the "text preparation algorithm" as specified here: html.spec.whatwg.org/multipage/canvas.html#text-preparation-algorithm However, we're missing a lot of things such as the CanvasTextDrawingStyles interface, so most of the algorithm was not implemented. Additionally, we also are not able to use a LineBox like the algorithm suggests, because our layouting infra is not up to the task yet. The prepare_text function does nothing other than figuring out the width of the given text and return glyphs with offsets at the moment.
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Gfx::IntPoint position;
};
struct PreparedText {
Vector<PreparedTextGlyph> glyphs;
Gfx::TextAlignment physical_alignment;
Gfx::IntRect bounding_box;
};
Everywhere: Run clang-format
2022-04-01 20:58:27 +03:00
void did_draw(Gfx::FloatRect const&);
LibWeb: Add initial implementation of CRC2D.clip() This allows clipping your drawing by any path you like! To do this all painting has been wrapped around a new draw_clipped() helper method, which handles the clipping before/after painting. Note: This clipping is currently missing support for intersecting clip paths.
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template<typename TDrawFunction>
void draw_clipped(TDrawFunction draw_function)
{
auto painter = this->antialiased_painter();
if (!painter.has_value())
return;
ScopedCanvasPathClip clipper(painter->underlying_painter(), drawing_state().clip);
auto draw_rect = draw_function(*painter);
if (drawing_state().clip.has_value())
draw_rect.intersect(drawing_state().clip->path.bounding_box());
did_draw(draw_rect);
}
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
PreparedText prepare_text(DeprecatedString const& text, float max_width = INFINITY);
LibWeb: Add basic support for requestAnimationFrame() We now support rAF, driven by GUI::DisplayLink callbacks. It's a bit strange how we keep registering new callbacks over and over. That's something we can definitely optimize. This allows you to update animations/whatever without doing it more often than the browser can display.
2020-03-22 21:15:49 +01:00
LibWeb: Use AntiAliasingPainter for canvas painting
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Gfx::Painter* painter();
Optional<Gfx::AntiAliasingPainter> antialiased_painter();
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
LibWeb: Forward CRC2D's ref count to HTMLCanvasElement This allows HTMLCanvasElement and CRC2D to share their lifetime, as JS allows them to arbitrarily access them at any time and CRC2D.canvas expects a non-null return value.
2022-06-19 19:42:27 +01:00
HTMLCanvasElement& canvas_element();
HTMLCanvasElement const& canvas_element() const;
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
LibWeb: Add initial implementation of CRC2D.globalAlpha Works for fills and strokes (using colors, gradients, or patterns), along with images. fill_rect() has been updated to use fill_path(), which allows it to easily transform the rect, and already supports opacity. Co-authored-by: MacDue <macdue@dueutil.tech>
2023-05-19 22:42:47 +02:00
Gfx::Path rect_path(float x, float y, float width, float height);
LibWeb: Teach CRC2D to draw Path2Ds :^)
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void stroke_internal(Gfx::Path const&);
LibWeb: Add initial implementation of CRC2D.globalAlpha Works for fills and strokes (using colors, gradients, or patterns), along with images. fill_rect() has been updated to use fill_path(), which allows it to easily transform the rect, and already supports opacity. Co-authored-by: MacDue <macdue@dueutil.tech>
2023-05-19 22:42:47 +02:00
void fill_internal(Gfx::Path const&, Gfx::Painter::WindingRule);
void clip_internal(Gfx::Path&, Gfx::Painter::WindingRule);
LibWeb: Teach CRC2D to draw Path2Ds :^)
2022-08-11 17:39:37 +01:00
LibWeb: Make 2D and 3D canvas rendering contexts GC-allocated
2022-09-02 15:53:02 +02:00
JS::NonnullGCPtr<HTMLCanvasElement> m_element;
LibWeb: Use AntiAliasingPainter for canvas painting
2022-11-30 00:10:02 +00:00
OwnPtr<Gfx::Painter> m_painter;
LibWeb+LibJS: Make the EventTarget hierarchy (incl. DOM) GC-allocated This is a monster patch that turns all EventTargets into GC-allocated PlatformObjects. Their C++ wrapper classes are removed, and the LibJS garbage collector is now responsible for their lifetimes. There's a fair amount of hacks and band-aids in this patch, and we'll have a lot of cleanup to do after this.
2022-08-28 13:42:07 +02:00
LibWeb: Add CanvasRenderingContext2D's origin-clean flag
2022-03-04 18:57:29 +01:00
// https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-origin-clean
bool m_origin_clean { true };
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
};
LibWeb: Implement CanvasRenderingContext2D.drawImage() closer to spec Also add support for HTMLCanvasElement for the image parameter, leading to replacing HTMLImageElement with the CanvasImageSource Variant type. Also stub out the 'check the usability of the image argument' and 'is not origin-clean' operations, while taking into consideration that these can throw (and require DOM::ExceptionOr).
2022-03-04 19:02:10 +01:00
enum class CanvasImageSourceUsability {
Bad,
Good,
};
LibWeb: Move ExceptionOr from DOM/ to WebIDL/ This is a concept fully defined in the Web IDL spec and doesn't belong in the DOM directory/namespace - not even DOMException, despite the name :^)
2022-09-25 17:03:42 +01:00
WebIDL::ExceptionOr<CanvasImageSourceUsability> check_usability_of_image(CanvasImageSource const&);
LibWeb: Implement CanvasRenderingContext2D.drawImage() closer to spec Also add support for HTMLCanvasElement for the image parameter, leading to replacing HTMLImageElement with the CanvasImageSource Variant type. Also stub out the 'check the usability of the image argument' and 'is not origin-clean' operations, while taking into consideration that these can throw (and require DOM::ExceptionOr).
2022-03-04 19:02:10 +01:00
bool image_is_not_origin_clean(CanvasImageSource const&);
LibWeb: Add <canvas> element and start fleshing out CRC2D This patch adds HTMLCanvasElement along with a LayoutCanvas object. The DOM and layout parts are very similar to <img> elements. The <canvas> element holds a Gfx::Bitmap which is sized according to the "width" and "height" attributes on the element. Calling .getContext("2d") on a <canvas> element gives you a context object that draws into the underlying Gfx::Bitmap of the <canvas>. The context weakly points to the <canvas> which allows it to outlive the canvas element if needed. This is really quite cool. :^)
2020-03-19 19:07:56 +01:00
}
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