msg_tool\scripts\softpal\img\pgd/
pgd3.rs

1use super::base::*;
2use crate::ext::io::*;
3use crate::scripts::base::*;
4use crate::types::*;
5use crate::utils::img::*;
6use crate::utils::struct_pack::*;
7use anyhow::Result;
8use std::io::{Read, Seek};
9
10#[derive(Debug)]
11pub struct Pgd3Builder {}
12
13impl Pgd3Builder {
14    pub fn new() -> Self {
15        Self {}
16    }
17}
18
19impl ScriptBuilder for Pgd3Builder {
20    fn default_encoding(&self) -> Encoding {
21        Encoding::Cp932
22    }
23
24    fn build_script(
25        &self,
26        buf: Vec<u8>,
27        filename: &str,
28        encoding: Encoding,
29        _archive_encoding: Encoding,
30        config: &ExtraConfig,
31        archive: Option<&Box<dyn Script>>,
32    ) -> Result<Box<dyn Script>> {
33        Ok(Box::new(Pgd3::new(
34            MemReader::new(buf),
35            filename,
36            encoding,
37            config,
38            archive,
39        )?))
40    }
41
42    fn extensions(&self) -> &'static [&'static str] {
43        &["pgd"]
44    }
45
46    fn script_type(&self) -> &'static ScriptType {
47        &ScriptType::SoftpalPgd3
48    }
49
50    fn is_image(&self) -> bool {
51        true
52    }
53
54    fn is_this_format(&self, _filename: &str, buf: &[u8], buf_len: usize) -> Option<u8> {
55        if buf_len >= 4 && (buf.starts_with(b"PGD3") || buf.starts_with(b"PGD2")) {
56            return Some(20);
57        }
58        None
59    }
60}
61
62#[derive(Debug)]
63pub struct Pgd3 {
64    header: PgdDiffHeader,
65    base_header: PgdGeHeader,
66    base: ImageData,
67    diff: ImageData,
68}
69
70impl Pgd3 {
71    pub fn new<R: Read + Seek>(
72        mut reader: R,
73        filename: &str,
74        encoding: Encoding,
75        _config: &ExtraConfig,
76        archive: Option<&Box<dyn Script>>,
77    ) -> Result<Self> {
78        let mut sig = [0u8; 4];
79        reader.read_exact(&mut sig)?;
80        if &sig != b"PGD3" && &sig != b"PGD2" {
81            return Err(anyhow::anyhow!("Not a valid PGD3/PGD2 file"));
82        }
83        let header = PgdDiffHeader::unpack(&mut reader, false, encoding)?;
84        let diff = PgdReader::with_diff_header(reader, &header)?.unpack_overlay()?;
85        let base: Vec<u8> = if let Some(archive) = archive {
86            let mut file = archive.open_file_by_name(&header.base_name, true)?;
87            file.data()?
88        } else {
89            let path = {
90                let mut pb = std::path::PathBuf::from(filename);
91                pb.set_file_name(&header.base_name);
92                pb
93            };
94            crate::utils::files::read_file(&path).map_err(|e| {
95                anyhow::anyhow!("Failed to read base image file '{}': {}", path.display(), e)
96            })?
97        };
98        let mut reader = MemReader::new(base);
99        reader.read_exact(&mut sig)?;
100        if &sig != b"GE \0" {
101            return Err(anyhow::anyhow!(
102                "Base image file '{}' is not a valid GE file",
103                header.base_name
104            ));
105        }
106        let base_header = PgdGeHeader::unpack(&mut reader, false, encoding)?;
107        let base = PgdReader::with_ge_header(reader, &base_header)?.unpack_ge()?;
108        Ok(Self {
109            header,
110            base_header,
111            base,
112            diff,
113        })
114    }
115}
116
117impl Script for Pgd3 {
118    fn default_output_script_type(&self) -> OutputScriptType {
119        OutputScriptType::Json
120    }
121
122    fn default_format_type(&self) -> FormatOptions {
123        FormatOptions::None
124    }
125
126    fn is_image(&self) -> bool {
127        true
128    }
129
130    fn export_image(&self) -> Result<ImageData> {
131        let mut base = if self.base_header.is_base_file() {
132            self.base.clone()
133        } else {
134            draw_on_canvas(
135                self.base.clone(),
136                self.base_header.canvas_width,
137                self.base_header.canvas_height,
138                self.base_header.offset_x,
139                self.base_header.offset_y,
140            )?
141        };
142        draw_on_img(
143            &mut base,
144            &self.diff,
145            self.header.offset_x as u32,
146            self.header.offset_y as u32,
147        )?;
148        Ok(base)
149    }
150}
151
152fn draw_on_img(base: &mut ImageData, diff: &ImageData, left: u32, top: u32) -> Result<()> {
153    if base.color_type != diff.color_type {
154        return Err(anyhow::anyhow!(
155            "Color types do not match: {:?} vs {:?}",
156            base.color_type,
157            diff.color_type
158        ));
159    }
160    let bpp = base.color_type.bpp(1) as usize;
161    let base_stride = base.width as usize * bpp;
162    let diff_stride = diff.width as usize * bpp;
163
164    for y in 0..diff.height {
165        let base_y = top + y;
166        if base_y >= base.height {
167            continue; // Skip if the base image is not tall enough
168        }
169
170        for x in 0..diff.width {
171            let base_x = left + x;
172            if base_x >= base.width {
173                continue; // Skip if the base image is not wide enough
174            }
175
176            let base_index = (base_y as usize * base_stride) + (base_x as usize * bpp);
177            let diff_index = (y as usize * diff_stride) + (x as usize * bpp);
178
179            let diff_pixel = &diff.data[diff_index..diff_index + bpp];
180            let base_pixel_orig = base.data[base_index..base_index + bpp].to_vec();
181            let mut b = base_pixel_orig[0];
182            let mut g = base_pixel_orig[1];
183            let mut r = base_pixel_orig[2];
184            b ^= diff_pixel[0];
185            g ^= diff_pixel[1];
186            r ^= diff_pixel[2];
187            base.data[base_index] = b;
188            base.data[base_index + 1] = g;
189            base.data[base_index + 2] = r;
190            if bpp == 4 {
191                let mut a = base_pixel_orig[3];
192                a ^= diff_pixel[3];
193                base.data[base_index + 3] = a;
194            }
195        }
196    }
197    Ok(())
198}
msg_tool\scripts\softpal\img\pgd/pgd3.rs

msg_tool\scripts\softpal\img\pgd/
pgd3.rs
