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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>
This commit is contained in:
Simon Danner 2023-05-19 22:42:47 +02:00 committed by Andreas Kling
parent ff5d530aa3
commit 45f86466bb
8 changed files with 150 additions and 39 deletions

View file

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/*
* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWeb/HTML/ImageData.h>
namespace Web::HTML {
// https://html.spec.whatwg.org/multipage/canvas.html#canvascompositing
class CanvasCompositing {
public:
virtual ~CanvasCompositing() = default;
virtual float global_alpha() const = 0;
virtual void set_global_alpha(float) = 0;
protected:
CanvasCompositing() = default;
};
}