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
|
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package opentype_test
import (
"fmt"
"image"
"image/color"
"log"
"os"
"golang.org/x/image/font"
"golang.org/x/image/font/gofont/goitalic"
"golang.org/x/image/font/opentype"
"golang.org/x/image/math/fixed"
)
func ExampleNewFace() {
const (
width = 72
height = 36
startingDotX = 6
startingDotY = 28
)
f, err := opentype.Parse(goitalic.TTF)
if err != nil {
log.Fatalf("Parse: %v", err)
}
face, err := opentype.NewFace(f, &opentype.FaceOptions{
Size: 32,
DPI: 72,
Hinting: font.HintingNone,
})
if err != nil {
log.Fatalf("NewFace: %v", err)
}
dst := image.NewGray(image.Rect(0, 0, width, height))
d := font.Drawer{
Dst: dst,
Src: image.White,
Face: face,
Dot: fixed.P(startingDotX, startingDotY),
}
fmt.Printf("The dot is at %v\n", d.Dot)
d.DrawString("jel")
fmt.Printf("The dot is at %v\n", d.Dot)
d.Src = image.NewUniform(color.Gray{0x7F})
d.DrawString("ly")
fmt.Printf("The dot is at %v\n", d.Dot)
const asciiArt = ".++8"
buf := make([]byte, 0, height*(width+1))
for y := 0; y < height; y++ {
for x := 0; x < width; x++ {
c := asciiArt[dst.GrayAt(x, y).Y>>6]
if c != '.' {
// No-op.
} else if x == startingDotX-1 {
c = ']'
} else if y == startingDotY-1 {
c = '_'
}
buf = append(buf, c)
}
buf = append(buf, '\n')
}
os.Stdout.Write(buf)
// Output:
// The dot is at {6:00 28:00}
// The dot is at {41:32 28:00}
// The dot is at {66:48 28:00}
// .....]..................................................................
// .....]..................................................................
// .....]..................................................................
// .....]..................................+++......+++....................
// .....]........+++.......................888......+++....................
// .....].......+88+......................+88+......+++....................
// .....].......888+......................+88+.....+++.....................
// .....].......888+......................+88+.....+++.....................
// .....].................................888......+++.....................
// .....].................................888......+++.....................
// .....]....................++..........+88+......+++.....................
// .....]......+88+.......+888888+.......+88+.....+++....+++..........++...
// .....]......888......+888888888+......+88+.....+++....++++........+++...
// .....]......888.....+888+...+888......888......+++.....+++........++....
// .....].....+888....+888......+88+.....888......+++.....+++.......+++....
// .....].....+88+....888.......+88+....+88+......+++.....+++......+++.....
// .....].....+88+...+888.......+88+....+88+.....+++......+++......+++.....
// .....].....888....888+++++++++88+....+88+.....+++......+++.....+++......
// .....].....888....88888888888888+....888......+++......++++....++.......
// .....]....+888...+88888888888888.....888......+++.......+++...+++.......
// .....]....+88+...+888...............+888......+++.......+++..+++........
// .....]....+88+...+888...............+88+.....+++........+++..+++........
// .....]....888....+888...............+88+.....+++........+++.+++.........
// .....]....888....+888...............888......+++........++++++..........
// .....]...+888.....888+..............888......+++........++++++..........
// .....]...+88+.....+8888+....++8.....888+.....++++........++++...........
// .....]...+88+......+8888888888+.....+8888....+++++.......++++...........
// _____]___888________+88888888++______+888_____++++_______+++____________
// .....]...888...........+++.............++................+++............
// .....]..+88+............................................+++.............
// .....]..+88+...........................................+++..............
// .....].+888............................................+++..............
// ....888888............................................+++...............
// ....88888............................................++++...............
// ....+++.................................................................
// .....]..................................................................
}
|
