blob: 9e230c8ba7ffc448711eb0b3ad15622b3f20f129 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/*
* 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 };
};
}
|
