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// TODO: このファイルは好きな設計ではないので破壊する。
use super::texture::TextureWrapper;
use png::{BitDepth, ColorType, Decoder};
use std::io::Cursor;
use wgpu::{Device, Queue, TextureFormat, TextureUsages};
#[derive(Clone, Copy)]
pub enum ImageId {
Image,
}
static IMAGE_DATAS: [&[u8]; 1] = [include_bytes!(concat!(
env!("CARGO_MANIFEST_DIR"),
"/assets/image.png"
))];
pub fn create_textures(device: &Device, queue: &Queue) -> Vec<TextureWrapper> {
IMAGE_DATAS
.iter()
.map(|data| create_texture(device, queue, data))
.collect()
}
fn create_texture(device: &Device, queue: &Queue, data: &[u8]) -> TextureWrapper {
let mut reader = Decoder::new(Cursor::new(data))
.read_info()
.expect("fatal: failed to load image");
let mut buf = vec![
0x00;
reader
.output_buffer_size()
.expect("fatal: image is too large")
];
let info = reader
.next_frame(&mut buf)
.expect("fatal: failed to decode image");
if info.color_type != ColorType::Rgba || info.bit_depth != BitDepth::Eight {
panic!("fatal: image is not 8-bit RGBA");
}
let texture = TextureWrapper::new(
device,
info.width,
info.height,
TextureFormat::Rgba8UnormSrgb,
TextureUsages::TEXTURE_BINDING | TextureUsages::COPY_DST,
);
texture.write(queue, &buf[..info.buffer_size()]);
texture
}
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