singe-npp 0.1.0-alpha.8

Safe Rust wrappers for NVIDIA Performance Primitives library (NPP).
Documentation 
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
168
169
170
171
172
173
174

use crate::{
    error::{Error, Result},
    types::Size,
    utility::to_i32,
};

pub(super) fn validate_same_size(source: Size, destination: Size) -> Result<()> {
    if source == destination {
        return Ok(());
    }

    Err(Error::SizeMismatch {
        name: "image size".into(),
        expected: source,
        actual: destination,
    })
}

pub(super) fn validate_mask_size(roi: Size, mask: Size) -> Result<()> {
    if roi == mask {
        return Ok(());
    }

    Err(Error::SizeMismatch {
        name: "mask size".into(),
        expected: roi,
        actual: mask,
    })
}

pub(super) fn validate_border_placement(
    source: Size,
    destination: Size,
    top: usize,
    left: usize,
) -> Result<(i32, i32)> {
    let top = to_i32(top, "top")?;
    let left = to_i32(left, "left")?;

    let bottom = top
        .checked_add(source.height)
        .ok_or_else(|| Error::OutOfRange {
            name: "border offset".into(),
        })?;
    let right = left
        .checked_add(source.width)
        .ok_or_else(|| Error::OutOfRange {
            name: "border offset".into(),
        })?;

    if bottom > destination.height || right > destination.width {
        return Err(Error::SizeMismatch {
            name: "border placement".into(),
            expected: destination,
            actual: source,
        });
    }

    Ok((top, left))
}

pub(super) fn validate_subpixel_copy(
    source: Size,
    destination: Size,
    x_shift: f32,
    y_shift: f32,
) -> Result<()> {
    if !x_shift.is_finite()
        || !y_shift.is_finite()
        || !(0.0..1.0).contains(&x_shift)
        || !(0.0..1.0).contains(&y_shift)
    {
        return Err(Error::OutOfRange {
            name: "subpixel shift".into(),
        });
    }

    if destination.width > source.width || destination.height > source.height {
        return Err(Error::SizeMismatch {
            name: "subpixel source extent".into(),
            expected: source,
            actual: destination,
        });
    }

    Ok(())
}

pub(super) fn validate_transpose_size(source: Size, destination: Size) -> Result<()> {
    if source.width == destination.height && source.height == destination.width {
        return Ok(());
    }

    Err(Error::SizeMismatch {
        name: "transpose image size".into(),
        expected: source,
        actual: destination,
    })
}

pub(super) fn validate_scale_range(min: f32, max: f32) -> Result<()> {
    if !min.is_finite() || !max.is_finite() || max <= min {
        return Err(Error::OutOfRange {
            name: "scale range".into(),
        });
    }

    Ok(())
}

pub(super) fn validate_channel_order(order: &[i32], channels: i32) -> Result<()> {
    let mut seen = vec![false; channels as usize];
    for &channel in order {
        if !(0..channels).contains(&channel) {
            return Err(Error::OutOfRange {
                name: "channel order".into(),
            });
        }

        let index = channel as usize;
        if seen[index] {
            return Err(Error::OutOfRange {
                name: "channel order".into(),
            });
        }
        seen[index] = true;
    }

    Ok(())
}

pub(super) fn validate_channel_order_with_fill(
    order: &[i32],
    source_channels: i32,
    destination_channels: i32,
) -> Result<()> {
    let mut seen = vec![false; source_channels as usize];
    for &channel in order {
        if channel == source_channels {
            continue;
        }
        if !(0..source_channels).contains(&channel) {
            return Err(Error::OutOfRange {
                name: "channel order".into(),
            });
        }

        let index = channel as usize;
        if seen[index] {
            return Err(Error::OutOfRange {
                name: "channel order".into(),
            });
        }
        seen[index] = true;
    }

    if order.len() != destination_channels as usize {
        return Err(Error::OutOfRange {
            name: "channel order".into(),
        });
    }

    Ok(())
}

pub(super) fn validate_channel_index(channel: usize, channels: usize) -> Result<()> {
    if channel < channels {
        return Ok(());
    }

    Err(Error::OutOfRange {
        name: "channel".into(),
    })
}