re.gfx.text source code

1 /** renderable text */
2 
3 module re.gfx.text;
4 
5 import re.ecs;
6 import re.math;
7 import re.ng.diag;
8 import std.string;
9 static import raylib;
10 
11 /// renderable text
12 class Text : Component, Renderable2D {
13     private string _text;
14     /// text font
15     public raylib.Font font;
16     /// font size
17     public int size;
18     /// text color
19     public raylib.Color color;
20     private Vector2 _text_size;
21     private Vector2 _origin;
22     /// default font size
23     public enum default_size = 10;
24     private Align _horiz_align;
25     private Align _vert_align;
26 
27     /// alignment style
28     public enum Align {
29         /// left or top
30         Close,
31         /// center
32         Center,
33         /// right or bottom
34         Far
35     }
36 
37     /// create a new text
38     this(raylib.Font font, string text, int size, raylib.Color color) {
39         import re.core : Core;
40 
41         this._text = text;
42         this.font = font;
43         this.size = size;
44         this.color = color;
45         update_dimens();
46 
47         raylib.SetTextureFilter(font.texture, Core.default_filter_mode);
48     }
49 
50     /// gets text string
51     @property string text() {
52         return _text;
53     }
54 
55     /// sets text string
56     @property string text(string value) {
57         _text = value;
58         update_dimens();
59         return value;
60     }
61 
62     @property Rectangle bounds() {
63         return Bounds.calculate(entity.transform, _origin, _text_size.x, _text_size.y);
64     }
65 
66     @property private int spacing() {
67         return size / default_size;
68     }
69 
70     /// default font (builtin to raylib)
71     @property public static raylib.Font default_font() {
72         return raylib.GetFontDefault();
73     }
74 
75     private void update_dimens() {
76         _text_size = raylib.MeasureTextEx(font, toStringz(_text), size, spacing);
77         // calculate origin
78         auto ori_x = 0.0;
79         auto ori_y = 0.0;
80         if (_horiz_align == Align.Close)
81             ori_x = 0;
82         else if (_horiz_align == Align.Center)
83             ori_x = _text_size.x / 2;
84         else
85             ori_x = _text_size.x;
86         if (_vert_align == Align.Close)
87             ori_y = 0;
88         else if (_vert_align == Align.Center)
89             ori_y = _text_size.y / 2;
90         else
91             ori_y = _text_size.y;
92         _origin = Vector2(ori_x, ori_y);
93     }
94 
95     public void set_align(Align horiz, Align vert) {
96         _horiz_align = horiz;
97         _vert_align = vert;
98         update_dimens();
99     }
100 
101     void render() {
102         raylib.DrawTextEx(font, toStringz(_text), entity.position2 - _origin, size, spacing, color);
103     }
104 
105     void debug_render() {
106         DebugRender.default_debug_render(this);
107     }
108 }