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LibWeb: Implement CRC2D.imageSmoothingEnabled

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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)
This commit is contained in:
Andreas Kling 2023-03-29 18:35:02 +02:00
parent e4b71495f5
commit e77552519e
7 changed files with 75 additions and 2 deletions
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27
Userland/Libraries/LibWeb/HTML/Canvas/CanvasImageSmoothing.h Normal file
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@ -0,0 +1,27 @@
/*
* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWeb/HTML/ImageData.h>
namespace Web::HTML {
// https://html.spec.whatwg.org/multipage/canvas.html#canvasimagesmoothing
class CanvasImageSmoothing {
public:
virtual ~CanvasImageSmoothing() = default;
virtual bool image_smoothing_enabled() const = 0;
virtual void set_image_smoothing_enabled(bool) = 0;
virtual Bindings::ImageSmoothingQuality image_smoothing_quality() const = 0;
virtual void set_image_smoothing_quality(Bindings::ImageSmoothingQuality) = 0;
protected:
CanvasImageSmoothing() = default;
};
}

6
Userland/Libraries/LibWeb/HTML/Canvas/CanvasImageSmoothing.idl Normal file
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@ -0,0 +1,6 @@
// https://html.spec.whatwg.org/multipage/canvas.html#canvasimagesmoothing
interface mixin CanvasImageSmoothing {
// image smoothing
attribute boolean imageSmoothingEnabled; // (default true)
attribute ImageSmoothingQuality imageSmoothingQuality; // (default low)
};

3
Userland/Libraries/LibWeb/HTML/Canvas/CanvasState.h
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@ -12,6 +12,7 @@
#include <LibGfx/AffineTransform.h>
#include <LibGfx/Color.h>
#include <LibGfx/PaintStyle.h>
#include <LibWeb/Bindings/CanvasRenderingContext2DPrototype.h>
#include <LibWeb/HTML/CanvasGradient.h>
#include <LibWeb/HTML/CanvasPattern.h>
@ -74,6 +75,8 @@ public:
FillOrStrokeStyle fill_style { Gfx::Color::Black };
FillOrStrokeStyle stroke_style { Gfx::Color::Black };
float line_width { 1 };
bool image_smoothing_enabled { true };
Bindings::ImageSmoothingQuality image_smoothing_quality { Bindings::ImageSmoothingQuality::Low };
};
DrawingState& drawing_state() { return m_drawing_state; }
DrawingState const& drawing_state() const { return m_drawing_state; }