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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/* Copyright (C) 2022 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_CANVAS2D
#define INCLUDED_CANVAS2D
#include "graphics/Texture.h"
#include "maths/Vector2D.h"
#include "renderer/backend/IDeviceCommandContext.h"
#include <memory>
#include <vector>
class CRect;
class CTextRenderer;
struct CColor;
// Encapsulates 2D drawing functionality to hide and optimize
// low level API calls.
class CCanvas2D
{
public:
CCanvas2D(Renderer::Backend::IDeviceCommandContext* deviceCommandContext);
~CCanvas2D();
CCanvas2D(const CCanvas2D&) = delete;
CCanvas2D& operator=(const CCanvas2D&) = delete;
CCanvas2D(CCanvas2D&&) = delete;
CCanvas2D& operator=(CCanvas2D&&) = delete;
/**
* Draws a line by the given points with the width and color.
*/
void DrawLine(
const std::vector<CVector2D>& points,
const float width, const CColor& color);
/**
* Draws the rect filled with the color.
*/
void DrawRect(const CRect& rect, const CColor& color);
/**
* Draws a piece of the texture from the source rect into the
* destination rect. The result color is set by the following formula:
* TEXTURE_COLOR * COLOR_MULTIPLY + COLOR_ADD
* The texture color is blended with its own grayscale version according to
* the grayscale factor.
*/
void DrawTexture(CTexturePtr texture,
const CRect& destination, const CRect& source,
const CColor& multiply, const CColor& add, const float grayscaleFactor);
/**
* A simpler version of the previous one, draws the texture into the
* destination rect without color modifications.
*/
void DrawTexture(CTexturePtr texture, const CRect& destination);
/**
* Draws a text using canvas materials.
*/
void DrawText(CTextRenderer& textRenderer);
/**
* Unbinds all binded resources and clears caches. Frequent calls might
* affect performance. Useful to call a custom rendering code.
*/
void Flush();
private:
class Impl;
std::unique_ptr<Impl> m;
};
#endif // INCLUDED_CANVAS2D
|
