libvips_rs/
utils.rs

1// (c) Copyright 2019-2023 MIT
2use crate::bindings;
3use crate::bindings::{VipsArrayDouble, VipsArrayImage, VipsArrayInt};
4use crate::error::Error;
5use crate::Result;
6use crate::VipsImage;
7use std::ffi::c_void;
8use std::ffi::CString;
9
10pub(crate) struct VipsArrayIntWrapper {
11    pub ctx: *mut VipsArrayInt,
12}
13pub(crate) struct VipsArrayDoubleWrapper {
14    pub ctx: *mut VipsArrayDouble,
15}
16pub(crate) struct VipsArrayImageWrapper {
17    pub ctx: *mut VipsArrayImage,
18}
19
20impl Drop for VipsArrayIntWrapper {
21    fn drop(&mut self) {
22        unsafe {
23            bindings::vips_area_unref(self.ctx as *mut bindings::VipsArea);
24        }
25    }
26}
27
28impl Drop for VipsArrayDoubleWrapper {
29    fn drop(&mut self) {
30        unsafe {
31            bindings::vips_area_unref(self.ctx as *mut bindings::VipsArea);
32        }
33    }
34}
35
36impl Drop for VipsArrayImageWrapper {
37    fn drop(&mut self) {
38        unsafe {
39            bindings::vips_area_unref(self.ctx as *mut bindings::VipsArea);
40        }
41    }
42}
43
44impl From<&[i32]> for VipsArrayIntWrapper {
45    #[inline]
46    fn from(array: &[i32]) -> Self {
47        VipsArrayIntWrapper {
48            ctx: unsafe { bindings::vips_array_int_new(array.as_ptr(), array.len() as i32) },
49        }
50    }
51}
52
53impl From<&[f64]> for VipsArrayDoubleWrapper {
54    #[inline]
55    fn from(array: &[f64]) -> Self {
56        VipsArrayDoubleWrapper {
57            ctx: unsafe { bindings::vips_array_double_new(array.as_ptr(), array.len() as i32) },
58        }
59    }
60}
61
62impl From<&[VipsImage]> for VipsArrayImageWrapper {
63    #[inline]
64    fn from(array: &[VipsImage]) -> Self {
65        let len = array.len() as i32;
66        let as_vips = array.iter().map(|v| v.ctx).collect::<Vec<_>>().as_mut_ptr();
67        VipsArrayImageWrapper {
68            ctx: unsafe { bindings::vips_array_image_new(as_vips, len) },
69        }
70    }
71}
72
73#[inline]
74pub fn result<T>(res: i32, output: T, error: Error) -> Result<T> {
75    if res == 0 {
76        Ok(output)
77    } else {
78        Err(error)
79    }
80}
81
82#[inline]
83pub(crate) fn new_c_string(string: &str) -> Result<CString> {
84    CString::new(string).map_err(|_| Error::InitializationError("Error initializing C string."))
85}
86
87#[inline]
88pub(crate) unsafe fn new_byte_array(buf: *mut c_void, size: u64) -> Vec<u8> {
89    Vec::from_raw_parts(buf as *mut u8, size as usize, size as usize)
90}
91
92#[inline]
93pub unsafe fn new_int_array(array: *mut i32, size: u64) -> Vec<i32> {
94    Vec::from(std::slice::from_raw_parts(array as *mut i32, size as usize))
95}
96
97#[inline]
98pub unsafe fn new_double_array(array: *mut f64, size: u64) -> Vec<f64> {
99    Vec::from(std::slice::from_raw_parts(array as *mut f64, size as usize))
100}
libvips_rs/utils.rs

libvips_rs/
utils.rs
