libwebp-sys2 0.2.0

A handwritten raw interface to libwebp
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

use std::mem;
use std::os::raw::*;

use libc::{memcpy, memset};

#[cfg(feature = "1_1")]
use crate::{WebPFree, WebPMalloc};
#[cfg(not(feature = "1_1"))]
use libc::{free as WebPFree, malloc as WebPMalloc};

#[allow(non_camel_case_types)]
pub type WebPFeatureFlags = u32;

#[cfg(not(feature = "0_6"))]
#[deprecated(note = "Removed as of libwebp 0.6.0")]
pub const FRAGMENTS_FLAG: WebPFeatureFlags = 0x00000001;
pub const ANIMATION_FLAG: WebPFeatureFlags = 0x00000002;
pub const XMP_FLAG: WebPFeatureFlags = 0x00000004;
pub const EXIF_FLAG: WebPFeatureFlags = 0x00000008;
pub const ALPHA_FLAG: WebPFeatureFlags = 0x00000010;
pub const ICCP_FLAG: WebPFeatureFlags = 0x00000020;
#[cfg(feature = "0_6")]
pub const ALL_VALID_FLAGS: WebPFeatureFlags = 0x0000003E;

#[allow(non_camel_case_types)]
pub type WebPMuxAnimDispose = u32;

pub const WEBP_MUX_DISPOSE_NONE: WebPMuxAnimDispose = 0;
pub const WEBP_MUX_DISPOSE_BACKGROUND: WebPMuxAnimDispose = 1;

#[allow(non_camel_case_types)]
pub type WebPMuxAnimBlend = u32;

pub const WEBP_MUX_BLEND: WebPMuxAnimBlend = 0;
pub const WEBP_MUX_NO_BLEND: WebPMuxAnimBlend = 1;

#[repr(C)]
#[derive(Debug, Clone, Copy)]
pub struct WebPData {
    pub bytes: *const u8,
    pub size: usize,
}

#[allow(non_snake_case)]
#[inline]
pub unsafe extern "C" fn WebPDataInit(webp_data: *mut WebPData) {
    if !webp_data.is_null() {
        unsafe { memset(webp_data as *mut c_void, 0, mem::size_of::<WebPData>()) };
    }
}

// Clears the contents of the 'webp_data' object by calling free(). Does not
// deallocate the object itself.
#[allow(non_snake_case)]
#[inline]
pub unsafe extern "C" fn WebPDataClear(webp_data: *mut WebPData) {
    if !webp_data.is_null() {
        unsafe { WebPFree((*webp_data).bytes as *mut c_void) };
        unsafe { WebPDataInit(webp_data) };
    }
}

// Allocates necessary storage for 'dst' and copies the contents of 'src'.
// Returns true on success.
#[allow(non_snake_case)]
#[must_use]
#[inline]
pub unsafe extern "C" fn WebPDataCopy(src: *const WebPData, dst: *mut WebPData) -> c_int {
    if src.is_null() || dst.is_null() {
        return 0;
    }
    unsafe {
        WebPDataInit(dst);
        if !(*src).bytes.is_null() && (*src).size != 0 {
            (*dst).bytes = WebPMalloc((*src).size) as *mut u8;
            if (*dst).bytes.is_null() {
                return 0;
            }
            memcpy(
                (*dst).bytes as *mut c_void,
                (*src).bytes as *const c_void,
                (*src).size,
            );
            (*dst).size = (*src).size;
        }
    }
    return 1;
}