kindle_screensaver/
structs.rs

1use thiserror::Error;
2use image::imageops;
3
4#[derive(Debug, Clone, Copy, PartialEq)]
5pub enum KindleModel {
6    Basic,
7    Paperwhite,
8    Colorsoft,
9}
10
11#[derive(Debug, Clone, Copy, PartialEq)]
12pub enum DitheringAlgorithm {
13    None,
14    FloydSteinberg,
15    Ordered,
16}
17
18#[derive(Debug, Clone, Copy, PartialEq)]
19pub enum ResizingMethod {
20    Nearest,
21    Triangle,
22    Lanczos3,
23}
24
25
26impl ResizingMethod {
27    pub fn to_filter_type(&self) -> imageops::FilterType {
28        match self {
29            ResizingMethod::Nearest => imageops::FilterType::Nearest,
30            ResizingMethod::Triangle => imageops::FilterType::Triangle, 
31            ResizingMethod::Lanczos3 => imageops::FilterType::Lanczos3,
32        }
33    }
34}
35
36impl ConversionOptions {
37    pub fn filter_type(&self) -> imageops::FilterType {
38        self.resizing_method.to_filter_type()
39    }
40}
41
42#[derive(Clone, Copy, PartialEq)]
43pub struct ConversionOptions {
44    pub model: KindleModel,
45    pub dithering: DitheringAlgorithm,
46    pub optimize_contrast: bool,
47    pub resizing_method: ResizingMethod,
48}
49
50impl Default for ConversionOptions {
51    fn default() -> Self {
52        Self {
53            model: KindleModel::Paperwhite,
54            dithering: DitheringAlgorithm::None,
55            optimize_contrast: true,
56            resizing_method: ResizingMethod::Nearest,
57        }
58    }
59}
60
61impl KindleModel {
62    pub fn dimensions(&self) -> (u32, u32) {
63        match self {
64            KindleModel::Basic => (1072, 1448),
65            KindleModel::Paperwhite => (1072, 1448),
66            KindleModel::Colorsoft => (1272, 1696),
67        }
68    }
69
70    pub fn bit_depth(&self) -> u8 {
71        match self {
72            KindleModel::Basic => 8,
73            KindleModel::Paperwhite => 8,
74            KindleModel::Colorsoft => 32,
75        }
76    }
77    
78    pub fn is_color(&self) -> bool {
79        // only kindle colorsoft has color currently
80        match self {
81            KindleModel::Colorsoft => true,
82            _ => false,
83        }
84    }
85}
86
87#[derive(Error, Debug)]
88pub enum KindleError {
89    #[error("Image processing error: {0}")]
90    ImageError(#[from] image::ImageError),
91    
92    #[error("IO error: {0}")]
93    IoError(#[from] std::io::Error),
94    
95    #[error("Unsupported image format")]
96    UnsupportedFormat,
97    
98    #[error("Invalid input data")]
99    InvalidData,
100}
kindle_screensaver/structs.rs

kindle_screensaver/
structs.rs
