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use std::fmt::Display;
use std::path::Path;
use std::sync::atomic::{AtomicU32, Ordering};
use ecs::Component;
use image::io::Reader as ImageReader;
use image::{DynamicImage, ImageError, Rgb, RgbImage};
use crate::color::Color;
use crate::opengl::texture::PixelDataFormat;
use crate::vector::Vec2;
static NEXT_ID: AtomicU32 = AtomicU32::new(0);
mod reexports
{
pub use crate::opengl::texture::{Filtering, Wrapping};
}
pub use reexports::*;
#[derive(Debug, Clone)]
pub struct Texture
{
id: Id,
image: DynamicImage,
pixel_data_format: PixelDataFormat,
dimensions: Vec2<u32>,
properties: Properties,
}
impl Texture
{
/// Opens a texture image.
///
/// # Errors
/// Will return `Err` if:
/// - Opening the image fails
/// - The image data is not 8-bit/color RGB
#[allow(clippy::new_without_default)]
pub fn open(path: &Path) -> Result<Self, Error>
{
let image = ImageReader::open(path)
.map_err(Error::OpenImageFailed)?
.decode()
.map_err(Error::DecodeImageFailed)?;
let pixel_data_format = match &image {
DynamicImage::ImageRgb8(_) => PixelDataFormat::Rgb,
DynamicImage::ImageRgba8(_) => PixelDataFormat::Rgba,
_ => {
return Err(Error::UnsupportedImageDataKind);
}
};
let dimensions = Vec2 { x: image.width(), y: image.height() };
let id = NEXT_ID.fetch_add(1, Ordering::Relaxed);
Ok(Self {
id: Id::new(id),
image,
pixel_data_format,
dimensions,
properties: Properties::default(),
})
}
#[must_use]
pub fn new_from_color(dimensions: &Vec2<u32>, color: &Color<u8>) -> Self
{
let image = RgbImage::from_pixel(
dimensions.x,
dimensions.y,
Rgb([color.red, color.green, color.blue]),
);
let id = NEXT_ID.fetch_add(1, Ordering::Relaxed);
Self {
id: Id::new(id),
image: image.into(),
pixel_data_format: PixelDataFormat::Rgb,
dimensions: dimensions.clone(),
properties: Properties::default(),
}
}
#[must_use]
pub fn id(&self) -> Id
{
self.id
}
#[must_use]
pub fn properties(&self) -> &Properties
{
&self.properties
}
pub fn properties_mut(&mut self) -> &mut Properties
{
&mut self.properties
}
#[must_use]
pub fn dimensions(&self) -> &Vec2<u32>
{
&self.dimensions
}
#[must_use]
pub fn pixel_data_format(&self) -> PixelDataFormat
{
self.pixel_data_format
}
#[must_use]
pub fn image(&self) -> &DynamicImage
{
&self.image
}
}
impl Drop for Texture
{
fn drop(&mut self)
{
NEXT_ID.fetch_sub(1, Ordering::Relaxed);
}
}
/// Texture error.
#[derive(Debug, thiserror::Error)]
pub enum Error
{
#[error("Failed to open texture image")]
OpenImageFailed(#[source] std::io::Error),
#[error("Failed to decode texture image")]
DecodeImageFailed(#[source] ImageError),
#[error("Unsupported image data kind")]
UnsupportedImageDataKind,
}
/// Texture properties
#[derive(Debug, Clone)]
#[non_exhaustive]
pub struct Properties
{
pub wrap: Wrapping,
pub magnifying_filter: Filtering,
pub minifying_filter: Filtering,
}
impl Default for Properties
{
fn default() -> Self
{
Self {
wrap: Wrapping::Repeat,
magnifying_filter: Filtering::Linear,
minifying_filter: Filtering::Nearest,
}
}
}
/// Texture ID.
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Id
{
id: u32,
}
impl Id
{
fn new(id: u32) -> Self
{
Self { id }
}
pub(crate) fn into_inner(self) -> u32
{
self.id
}
}
impl Display for Id
{
fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result
{
self.id.fmt(formatter)
}
}
/// Texture list.
#[derive(Component)]
pub struct List
{
pub list: Vec<Texture>,
}
impl FromIterator<Texture> for List
{
fn from_iter<Iter>(iter: Iter) -> Self
where
Iter: IntoIterator<Item = Texture>,
{
Self { list: iter.into_iter().collect() }
}
}
|
