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Add pimg extract support

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lifegpc
2025-07-03 13:10:34 +08:00
parent 53ebb9612f
commit 64ac525bce
10 changed files with 507 additions and 37 deletions
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36
src/scripts/cat_system/image/hg3.rs
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@@ -390,39 +390,3 @@ impl<'a> Hg3Reader<'a> {
Ok(img)
}
}
fn draw_on_canvas(
img: ImageData,
canvas_width: u32,
canvas_height: u32,
offset_x: u32,
offset_y: u32,
) -> Result<ImageData> {
let bytes_per_pixel = img.color_type.bpp(img.depth) as u32 / 8;
let mut canvas_data = vec![0u8; (canvas_width * canvas_height * bytes_per_pixel) as usize];
let canvas_stride = canvas_width * bytes_per_pixel;
let img_stride = img.width * bytes_per_pixel;
for y in 0..img.height {
let canvas_y = y + offset_y;
if canvas_y >= canvas_height {
continue;
}
let canvas_start = (canvas_y * canvas_stride + offset_x * bytes_per_pixel) as usize;
let img_start = (y * img_stride) as usize;
let copy_len = img_stride as usize;
if canvas_start + copy_len > canvas_data.len() {
continue;
}
canvas_data[canvas_start..canvas_start + copy_len]
.copy_from_slice(&img.data[img_start..img_start + copy_len]);
}
Ok(ImageData {
width: canvas_width,
height: canvas_height,
color_type: img.color_type,
depth: img.depth,
data: canvas_data,
})
}