d2d.font.ttftext source code

1 module d2d.font.ttftext;
2 
3 import d2d;
4 
5 /// Implementation containing text drawable functions using a TTF font. Nice for static texts, slow for dynamic texts.
6 class TTFText : RectangleShape, IText
7 {
8 private:
9 	float _scale = 1.0f;
10 	string _text = "";
11 	TTFFont _font;
12 	bool _multiline = false;
13 
14 public:
15 	/// Creates an empty ttf text
16 	this(TTFFont font)
17 	{
18 		_font = font;
19 		texture = new Texture();
20 		texture.create(0, 0, []);
21 	}
22 
23 	/// Gets the scale in percent.
24 	override @property float scale()
25 	{
26 		return _scale;
27 	}
28 
29 	/// Sets the scale in percent.
30 	override @property void scale(float value)
31 	{
32 		_scale = value;
33 	}
34 
35 	/// Gets the text.
36 	override @property string text()
37 	{
38 		return _text;
39 	}
40 
41 	/// Modifies the text.
42 	override @property void text(string value)
43 	{
44 		if (_text != value)
45 		{
46 			_text = value;
47 			redraw();
48 		}
49 	}
50 
51 	/// Returns if this text should be rendered multiline.
52 	@property bool multiline()
53 	{
54 		return _multiline;
55 	}
56 
57 	/// Sets if this text should be rendered multiline.
58 	@property void multiline(bool value)
59 	{
60 		if (_multiline != value)
61 		{
62 			_multiline = value;
63 			redraw();
64 		}
65 	}
66 
67 	/// Should get called automatically when something changed.
68 	void redraw()
69 	{
70 		Bitmap bmp;
71 		if (_multiline)
72 		{
73 			string[] lines = text.split('\n');
74 			int maxWidth = 0;
75 			foreach (string line; lines)
76 			{
77 				int w, h;
78 				TTF_SizeText(_font.handle, line.toStringz(), &w, &h);
79 				maxWidth = max(w, maxWidth);
80 			}
81 			bmp = Bitmap.fromSurface(TTF_RenderUTF8_Blended_Wrapped(_font.handle, text.toStringz(), Color.White.sdl_color, maxWidth));
82 		}
83 		else
84 		{
85 			bmp = Bitmap.fromSurface(TTF_RenderUTF8_Blended(_font.handle, text.toStringz(), Color.White.sdl_color));
86 		}
87 		if (!bmp.valid)
88 			throw new Exception(cast(string) TTF_GetError().fromStringz());
89 		texture.recreateFromBitmap(bmp, "Blended Text: \"" ~ text ~ "\"");
90 		size = vec2(texture.width, texture.height);
91 		create();
92 	}
93 
94 	override void draw(IRenderTarget target, ShaderProgram shader = null)
95 	{
96 		matrixStack.push();
97 		matrixStack.top = matrixStack.top * mat4.scaling(_scale, _scale, 1);
98 		super.draw(target, shader);
99 		matrixStack.pop();
100 	}
101 
102 	override @property bool valid()
103 	{
104 		return super.valid;
105 	}
106 
107 	override void dispose()
108 	{
109 		super.dispose();
110 	}
111 }