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
/*
* Copyright (c) 2023.
*
* This software is free software;
*
* You can redistribute it or modify it under terms of the MIT, Apache License or Zlib license
*/
//!This crate provides a library for decoding valid
//! ITU-T Rec. T.851 (09/2005) ITU-T T.81 (JPEG-1) or JPEG images.
//!
//!
//!
//! # Features
//! - SSE and AVX accelerated functions to speed up certain decoding operations
//! - FAST and accurate 32 bit IDCT algorithm
//! - Fast color convert functions
//! - RGBA and RGBX (4-Channel) color conversion functions
//! - YCbCr to Luma(Grayscale) conversion.
//!
//! # Usage
//! Add zune-jpeg to the dependencies in the project Cargo.toml
//!
//! ```toml
//! [dependencies]
//! zune_jpeg = "0.3"
//! ```
//! # Examples
//!
//! ## Decode a JPEG file with default arguments.
//!```no_run
//! use std::fs::read;
//! use zune_jpeg::JpegDecoder;
//! let file_contents = read("a_jpeg.file").unwrap();
//! let mut decoder = JpegDecoder::new(&file_contents);
//! let mut pixels = decoder.decode().unwrap();
//! ```
//!
//! ## Decode a JPEG file to RGBA format
//!
//! - Other (limited) supported formats are and BGR, BGRA
//!
//!```no_run
//! use zune_core::colorspace::ColorSpace;
//! use zune_core::options::DecoderOptions;
//! use zune_jpeg::JpegDecoder;
//!
//! let mut options = DecoderOptions::default().jpeg_set_out_colorspace(ColorSpace::RGBA);
//!
//! let mut decoder = JpegDecoder::new_with_options(&[],options);
//! let pixels = decoder.decode().unwrap();
//! ```
//!
//! ## Decode an image and get it's width and height.
//!```no_run
//! use zune_jpeg::JpegDecoder;
//!
//! let mut decoder = JpegDecoder::new(&[]);
//! decoder.decode_headers().unwrap();
//! let image_info = decoder.info().unwrap();
//! println!("{},{}",image_info.width,image_info.height)
//! ```
//! # Crate features.
//! This crate tries to be as minimal as possible while being extensible
//! enough to handle the complexities arising from parsing different types
//! of jpeg images.
//!
//! Safety is a top concern that is why we provide both static ways to disable unsafe code,
//! disabling x86 feature, and dynamic ,by using [`DecoderOptions::set_use_unsafe(false)`],
//! both of these disable platform specific optimizations, which reduce the speed of decompression.
//!
//! Please do note that careful consideration has been taken to ensure that the unsafe paths
//! are only unsafe because they depend on platform specific intrinsics, hence no need to disable them
//!
//! The crate tries to decode as many images as possible, as a best effort, even those violating the standard
//! , this means a lot of images may get silent warnings and wrong output, but if you are sure you will be handling
//! images that follow the spec, set `ZuneJpegOptions::set_strict` to true.
//!
//![`DecoderOptions::set_use_unsafe(false)`]: https://docs.rs/zune-core/0.2.1/zune_core/options/struct.DecoderOptions.html#method.set_use_unsafe
// no_std compatibility
extern crate alloc;
extern crate core;
pub use zune_core;
pub use crate;