forked from phaserjs/phaser
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathGetBitmapTextSize.js
More file actions
133 lines (105 loc) · 2.79 KB
/
GetBitmapTextSize.js
File metadata and controls
133 lines (105 loc) · 2.79 KB
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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2018 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
var GetBitmapTextSize = function (src, round)
{
var text = src.text;
var textLength = text.length;
var bx = Number.MAX_VALUE;
var by = Number.MAX_VALUE;
var bw = 0;
var bh = 0;
var chars = src.fontData.chars;
var lineHeight = src.fontData.lineHeight;
var xAdvance = 0;
var yAdvance = 0;
var indexCount = 0;
var charCode = 0;
var glyph = null;
var glyphW = 0;
var glyphH = 0;
var x = 0;
var y = 0;
var lastGlyph = null;
var lastCharCode = 0;
for (var index = 0; index < textLength; ++index)
{
charCode = text.charCodeAt(index);
if (charCode === 10)
{
xAdvance = 0;
indexCount = 0;
yAdvance += lineHeight;
lastGlyph = null;
continue;
}
glyph = chars[charCode];
if (!glyph)
{
continue;
}
glyphW = glyph.width;
glyphH = glyph.height;
x = indexCount + glyph.xOffset + xAdvance;
y = glyph.yOffset + yAdvance;
if (lastGlyph !== null)
{
var kerningOffset = glyph.kerning[lastCharCode];
x += (kerningOffset !== undefined) ? kerningOffset : 0;
}
if (bx > x)
{
bx = x;
}
if (by > y)
{
by = y;
}
var gw = x + glyphW - bx;
var gh = y + glyphH - by;
if (bw < gw)
{
bw = gw;
}
if (bh < gh)
{
bh = gh;
}
xAdvance += glyph.xAdvance;
indexCount += 1;
lastGlyph = glyph;
lastCharCode = charCode;
}
var scale = (src.fontSize / src.fontData.size);
var sx = scale * src.scaleX;
var sy = scale * src.scaleY;
var out = {
local: {
x: bx * scale,
y: by * scale,
width: bw * scale,
height: bh * scale
},
global: {
x: src.x + (bx * sx),
y: src.y + (by * sy),
width: bw * sx,
height: bh * sy
}
};
if (round)
{
out.local.x = Math.round(out.local.x);
out.local.y = Math.round(out.local.y);
out.local.width = Math.round(out.local.width);
out.local.height = Math.round(out.local.height);
out.global.x = Math.round(out.global.x);
out.global.y = Math.round(out.global.y);
out.global.width = Math.round(out.global.width);
out.global.height = Math.round(out.global.height);
}
return out;
};
module.exports = GetBitmapTextSize;