61 lines
2.3 KiB
Rust
61 lines
2.3 KiB
Rust
|
// ImageModel — CPU-side data for a raster image quad.
|
||
|
|
//
|
||
|
|
// Holds decoded RGBA pixel data and the world-space quad geometry derived
|
||
|
|
// from the RasterImage entity's insertion point, u/v vectors, and pixel size.
|
||
|
|
|
||
|
|
use std::path::Path;
|
||
|
|
|
||
|
|
#[derive(Clone, Debug)]
|
||
|
|
pub struct ImageModel {
|
||
|
|
/// Original file path (used for reload / display in properties).
|
||
|
|
pub file_path: String,
|
||
|
|
/// RGBA8 pixel data in row-major order.
|
||
|
|
pub pixels: Vec<u8>,
|
||
|
|
pub width: u32,
|
||
|
|
pub height: u32,
|
||
|
|
/// Opacity: 1.0 = opaque, 0.0 = transparent.
|
||
|
|
pub opacity: f32,
|
||
|
|
/// World-space quad corners (CCW), same order as image_corners() helper:
|
||
|
|
/// [0] origin (bottom-left)
|
||
|
|
/// [1] origin + U*W (bottom-right)
|
||
|
|
/// [2] origin + U*W + V*H (top-right)
|
||
|
|
/// [3] origin + V*H (top-left)
|
||
|
|
pub corners: [[f32; 3]; 4],
|
||
|
|
}
|
||
|
|
|
||
|
|
impl ImageModel {
|
||
|
|
/// Build an ImageModel from a DXF RasterImage entity.
|
||
|
|
/// Returns `None` if the image file cannot be opened or decoded.
|
||
|
|
pub fn from_raster_image(img: &acadrust::entities::RasterImage) -> Option<Self> {
|
||
|
|
let w = img.size.x;
|
||
|
|
let h = img.size.y;
|
||
|
|
let ox = img.insertion_point.x as f32;
|
||
|
|
let oy = img.insertion_point.y as f32;
|
||
|
|
let oz = img.insertion_point.z as f32;
|
||
|
|
let ux = (img.u_vector.x * w) as f32;
|
||
|
|
let uy = (img.u_vector.y * w) as f32;
|
||
|
|
let uz = (img.u_vector.z * w) as f32;
|
||
|
|
let vx = (img.v_vector.x * h) as f32;
|
||
|
|
let vy = (img.v_vector.y * h) as f32;
|
||
|
|
let vz = (img.v_vector.z * h) as f32;
|
||
|
|
let corners = [
|
||
|
|
[ox, oy, oz],
|
||
|
|
[ox + ux, oy + uy, oz + uz],
|
||
|
|
[ox + ux + vx, oy + uy + vy, oz + uz + vz],
|
||
|
|
[ox + vx, oy + vy, oz + vz],
|
||
|
|
];
|
||
|
|
let opacity = 1.0 - img.fade as f32 / 100.0;
|
||
|
|
|
||
|
|
let (pixels, width, height) = load_pixels(&img.file_path)?;
|
||
|
|
Some(Self { file_path: img.file_path.clone(), pixels, width, height, opacity, corners })
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Decode a raster image file into RGBA8 pixels.
|
||
|
|
/// Returns `None` if the file does not exist or cannot be decoded.
|
||
|
|
pub fn load_pixels(path_str: &str) -> Option<(Vec<u8>, u32, u32)> {
|
||
|
|
let img = image::open(Path::new(path_str)).ok()?;
|
||
|
|
let rgba = img.to_rgba8();
|
||
|
|
let (w, h) = rgba.dimensions();
|
||
|
|
Some((rgba.into_raw(), w, h))
|
||
|
|
}
|