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use crate::draw::texture::{resolver::TextureResolver, LoadableImage};
use egui::{CtxRef, Texture};
use std::{convert::TryInto, sync::Arc};
pub struct UiTextures {
ctx: CtxRef,
}
impl TextureResolver for UiTextures {
type Image = Arc<Texture>;
fn resolve(&mut self, tex: u32) -> Option<Self::Image> {
if tex == 0 {
Some(self.ctx.texture())
} else {
None
}
}
}
impl UiTextures {
pub fn new(ctx: CtxRef) -> Self {
UiTextures { ctx }
}
}
impl LoadableImage for Arc<Texture> {
fn width(&self) -> u32 {
self.width as u32
}
fn height(&self) -> u32 {
self.height as u32
}
fn copy_row(&self, y: u32, ptr: *mut u8) {
let row_size = self.width();
let pixels = &self.pixels[(y * row_size) as usize..((y + 1) * row_size) as usize];
for (i, x) in pixels.iter().enumerate() {
unsafe {
*ptr.offset(i as isize * 4) = 255;
*ptr.offset((i as isize * 4) + 1) = 255;
*ptr.offset((i as isize * 4) + 2) = 255;
*ptr.offset((i as isize * 4) + 3) = *x;
}
}
}
unsafe fn copy_into(&self, ptr: *mut u8, row_size: usize) {
for y in 0..self.height() {
self.copy_row(y, ptr.offset((row_size * y as usize).try_into().unwrap()));
}
}
}
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