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LibWeb: Extract CanvasState class from CRC2D

As with CanvasPath, this is to better match the spec IDL.
This commit is contained in:
Sam Atkins 2022-08-12 14:00:00 +01:00 committed by Andreas Kling
parent 7b61d16262
commit 08e6071ebb
7 changed files with 154 additions and 93 deletions

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/*
* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Vector.h>
#include <LibGfx/AffineTransform.h>
#include <LibGfx/Color.h>
namespace Web::HTML {
// https://html.spec.whatwg.org/multipage/canvas.html#canvasstate
class CanvasState {
public:
virtual ~CanvasState() = default;
void save();
void restore();
void reset();
bool is_context_lost();
// https://html.spec.whatwg.org/multipage/canvas.html#drawing-state
struct DrawingState {
Gfx::AffineTransform transform;
Gfx::Color fill_style { Gfx::Color::Black };
Gfx::Color stroke_style { Gfx::Color::Black };
float line_width { 1 };
};
DrawingState& drawing_state() { return m_drawing_state; }
DrawingState const& drawing_state() const { return m_drawing_state; }
void clear_drawing_state_stack() { m_drawing_state_stack.clear(); }
void reset_drawing_state() { m_drawing_state = {}; }
virtual void reset_to_default_state() = 0;
protected:
CanvasState() = default;
private:
DrawingState m_drawing_state;
Vector<DrawingState> m_drawing_state_stack;
// https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-context-lost
bool m_context_lost { false };
};
}