1use std::{ffi::CString, io};
2
3use crate::{interop::RustWStream, prelude::*, DataTable, Pixmap};
4use skia_bindings as sb;
5
6bitflags! {
7 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
8 pub struct FilterFlag: u32 {
9 const ZERO = sb::SkPngEncoder_FilterFlag::kZero as _;
10 const NONE = sb::SkPngEncoder_FilterFlag::kNone as _;
11 const SUB = sb::SkPngEncoder_FilterFlag::kSub as _;
12 const UP = sb::SkPngEncoder_FilterFlag::kUp as _;
13 const AVG = sb::SkPngEncoder_FilterFlag::kAvg as _;
14 const PAETH = sb::SkPngEncoder_FilterFlag::kPaeth as _;
15 const ALL = Self::NONE.bits() | Self::SUB.bits() | Self::UP.bits() | Self::AVG.bits() | Self::PAETH.bits();
16 }
17}
18native_transmutable!(sb::SkPngEncoder_FilterFlag, FilterFlag, filter_flag_layout);
19
20#[derive(Debug, Clone, PartialEq, Eq)]
21#[non_exhaustive]
22pub struct Options {
23 pub filter_flags: FilterFlag,
24 pub z_lib_level: i32,
25 pub comments: Vec<Comment>,
26 // TODO: ICCProfile
27 // TODO: ICCProfileDescription
28 // TODO: If SkGainmapInfo get out of private/ : fGainmap fGainmapInfo
29}
30
31impl Default for Options {
32 fn default() -> Self {
33 Self {
34 filter_flags: FilterFlag::ALL,
35 z_lib_level: 6,
36 comments: vec![],
37 }
38 }
39}
40
41impl Options {
42 fn comments_to_data_table(&self) -> Option<DataTable> {
43 let mut comments: Vec = Vec::with_capacity(self.comments.len() * 2);
44 for c: &Comment in self.comments.iter() {
45 comments.push(CString::new(c.keyword.as_str()).ok()?);
46 comments.push(CString::new(c.text.as_str()).ok()?);
47 }
48 let slices: Vec<&[u8]> = comments.iter().map(|c: &CString| c.as_bytes_with_nul()).collect();
49 Some(DataTable::from_slices(&slices))
50 }
51}
52
53#[derive(Debug, Clone, PartialEq, Eq)]
54pub struct Comment {
55 pub keyword: String,
56 pub text: String,
57}
58
59impl Comment {
60 pub fn new(keyword: impl Into<String>, text: impl Into<String>) -> Self {
61 Self {
62 keyword: keyword.into(),
63 text: text.into(),
64 }
65 }
66}
67
68pub fn encode<W: io::Write>(pixmap: &Pixmap, writer: &mut W, options: &Options) -> bool {
69 let Some(comments: RCHandle) = options.comments_to_data_table() else {
70 return false;
71 };
72
73 let mut stream: RustWStream<'_> = RustWStream::new(writer);
74
75 unsafe {
76 sb::C_SkPngEncoder_Encode(
77 stream.stream_mut(),
78 pixmap.native(),
79 comments.into_ptr(),
80 filterFlags:options.filter_flags.into_native(),
81 zLibLevel:options.z_lib_level,
82 )
83 }
84}
85
86pub fn encode_image<'a>(
87 context: impl Into<Option<&'a mut crate::gpu::DirectContext>>,
88 img: &crate::Image,
89 options: &Options,
90) -> Option<crate::Data> {
91 crate::Data::from_ptr(unsafe {
92 sb::C_SkPngEncoder_EncodeImage(
93 ctx:context.into().native_ptr_or_null_mut(),
94 img.native(),
95 comments:options.comments_to_data_table()?.into_ptr(),
96 filterFlags:options.filter_flags.into_native(),
97 zLibLevel:options.z_lib_level,
98 )
99 })
100}
101
102// TODO: Make
103