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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
use {
super::double_line::DoubleLine,
crate::{
app::AppContext,
display::{fill_bg, Screen, W},
errors::ProgramError,
kitty,
skin::PanelSkin,
},
crossterm::{
cursor,
style::{
Color,
SetBackgroundColor,
},
QueueableCommand,
},
image::{
io::Reader,
DynamicImage,
GenericImageView,
imageops::FilterType,
},
std::path::{Path, PathBuf},
termimad::{Area},
};
/// an already resized image, with the dimensions it
/// was computed for (which may be different from the
/// dimensions we got)
struct CachedImage {
img: DynamicImage,
target_width: u32,
target_height: u32,
}
/// an imageview can display an image in the terminal with
/// a ratio of one pixel per char in width.
pub struct ImageView {
path: PathBuf,
source_img: DynamicImage,
display_img: Option<CachedImage>,
}
impl ImageView {
pub fn new(path: &Path) -> Result<Self, ProgramError> {
let source_img = time!(
Debug,
"decode image",
path,
Reader::open(&path)?.decode()?
);
Ok(Self {
path: path.to_path_buf(),
source_img,
display_img: None,
})
}
pub fn is_png(&self) -> bool {
match self.path.extension() {
Some(ext) => ext == "png" || ext == "PNG",
None => false,
}
}
pub fn display(
&mut self,
w: &mut W,
_screen: Screen,
panel_skin: &PanelSkin,
area: &Area,
con: &AppContext,
) -> Result<(), ProgramError> {
let styles = &panel_skin.styles;
let bg = styles.preview.get_bg()
.or_else(|| styles.default.get_bg())
.unwrap_or(Color::AnsiValue(238));
#[cfg(unix)]
if let Some(renderer) = kitty::image_renderer() {
let mut renderer = renderer.lock().unwrap();
renderer.print(
w,
&self.source_img,
area,
)?;
for y in area.top..area.top+area.height {
w.queue(cursor::MoveTo(area.left, y))?;
fill_bg(w, area.width as usize, bg)?;
}
return Ok(());
}
let target_width = area.width as u32;
let target_height = (area.height*2) as u32;
let cached = self.display_img.as_ref()
.filter(|ci| ci.target_width==target_width && ci.target_height==target_height);
let img = match cached {
Some(ci) => &ci.img,
None => {
let img = time!(
Debug,
"resize image",
self.source_img.resize(target_width, target_height, FilterType::Triangle),
);
self.display_img = Some(CachedImage {
target_width,
target_height,
img,
});
&self.display_img.as_ref().unwrap().img
}
};
let (width, height) = img.dimensions();
debug!("resized image dimensions: {},{}", width, height);
debug_assert!(width <= area.width as u32);
let mut double_line = DoubleLine::new(width as usize, con.true_colors);
let mut y = area.top;
let img_top_offset = (area.height - (height/2) as u16)/2;
for _ in 0..img_top_offset {
w.queue(cursor::MoveTo(area.left, y))?;
fill_bg(w, area.width as usize, bg)?;
y += 1;
}
let margin = area.width as usize - width as usize;
let left_margin = margin / 2;
let right_margin = margin - left_margin;
w.queue(cursor::MoveTo(area.left, y))?;
for pixel in img.pixels() {
double_line.push(pixel.2);
if double_line.is_full() {
double_line.write(w, left_margin, right_margin, bg)?;
y += 1;
w.queue(cursor::MoveTo(area.left, y))?;
}
}
if !double_line.is_empty() {
double_line.write(w, left_margin, right_margin, bg)?;
y += 1;
}
w.queue(SetBackgroundColor(bg))?;
for y in y..area.top+area.height {
w.queue(cursor::MoveTo(area.left, y))?;
fill_bg(w, area.width as usize, bg)?;
}
Ok(())
}
pub fn display_info(
&mut self,
w: &mut W,
_screen: Screen,
panel_skin: &PanelSkin,
area: &Area,
) -> Result<(), ProgramError> {
let dim = self.source_img.dimensions();
let s = format!("{} x {}", dim.0, dim.1);
if s.len() > area.width as usize {
return Ok(());
}
w.queue(cursor::MoveTo(
area.left + area.width - s.len() as u16,
area.top,
))?;
panel_skin.styles.default.queue(w, s)?;
Ok(())
}
}
|