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use crate::Rect;
use bevy_asset::Handle;
use bevy_core::Bytes;
use bevy_math::Vec2;
use bevy_render::{
color::Color,
renderer::{RenderResource, RenderResources},
texture::Texture,
};
use bevy_type_registry::TypeUuid;
use bevy_utils::HashMap;
#[derive(Debug, RenderResources, TypeUuid)]
#[uuid = "946dacc5-c2b2-4b30-b81d-af77d79d1db7"]
pub struct TextureAtlas {
pub texture: Handle<Texture>,
pub size: Vec2,
#[render_resources(buffer)]
pub textures: Vec<Rect>,
#[render_resources(ignore)]
pub texture_handles: Option<HashMap<Handle<Texture>, usize>>,
}
#[derive(Bytes, Debug, RenderResources, RenderResource)]
#[render_resources(from_self)]
pub struct TextureAtlasSprite {
pub color: Color,
pub index: u32,
}
impl Default for TextureAtlasSprite {
fn default() -> Self {
Self {
index: 0,
color: Color::WHITE,
}
}
}
impl TextureAtlasSprite {
pub fn new(index: u32) -> TextureAtlasSprite {
Self {
index,
..Default::default()
}
}
}
impl TextureAtlas {
pub fn new_empty(texture: Handle<Texture>, dimensions: Vec2) -> Self {
Self {
texture,
size: dimensions,
texture_handles: None,
textures: Vec::new(),
}
}
pub fn from_grid(
texture: Handle<Texture>,
tile_size: Vec2,
columns: usize,
rows: usize,
) -> TextureAtlas {
Self::from_grid_with_padding(texture, tile_size, columns, rows, Vec2::new(0f32, 0f32))
}
pub fn from_grid_with_padding(
texture: Handle<Texture>,
tile_size: Vec2,
columns: usize,
rows: usize,
padding: Vec2,
) -> TextureAtlas {
let mut sprites = Vec::new();
let mut x_padding = 0.0;
let mut y_padding = 0.0;
for y in 0..rows {
if y > 0 {
y_padding = padding.y();
}
for x in 0..columns {
if x > 0 {
x_padding = padding.x();
}
let rect_min = Vec2::new(
(tile_size.x() + x_padding) * x as f32,
(tile_size.y() + y_padding) * y as f32,
);
sprites.push(Rect {
min: rect_min,
max: Vec2::new(rect_min.x() + tile_size.x(), rect_min.y() + tile_size.y()),
})
}
}
TextureAtlas {
size: Vec2::new(
((tile_size.x() + x_padding) * columns as f32) - x_padding,
((tile_size.y() + y_padding) * rows as f32) - y_padding,
),
textures: sprites,
texture,
texture_handles: None,
}
}
pub fn add_texture(&mut self, rect: Rect) {
self.textures.push(rect);
}
pub fn len(&self) -> usize {
self.textures.len()
}
pub fn is_empty(&self) -> bool {
self.textures.is_empty()
}
pub fn get_texture_index(&self, texture: &Handle<Texture>) -> Option<usize> {
self.texture_handles
.as_ref()
.and_then(|texture_handles| texture_handles.get(texture).cloned())
}
}