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use iced_graphics::image;
use iced_graphics::Size;
use glow::HasContext;
#[derive(Debug, Default)]
pub struct Storage;
impl image::Storage for Storage {
type Entry = Entry;
type State<'a> = &'a glow::Context;
fn upload(
&mut self,
width: u32,
height: u32,
data: &[u8],
gl: &mut &glow::Context,
) -> Option<Self::Entry> {
unsafe {
let texture = gl.create_texture().expect("create texture");
gl.bind_texture(glow::TEXTURE_2D, Some(texture));
gl.tex_image_2d(
glow::TEXTURE_2D,
0,
glow::SRGB8_ALPHA8 as i32,
width as i32,
height as i32,
0,
glow::RGBA,
glow::UNSIGNED_BYTE,
Some(data),
);
gl.tex_parameter_i32(
glow::TEXTURE_2D,
glow::TEXTURE_WRAP_S,
glow::CLAMP_TO_EDGE as _,
);
gl.tex_parameter_i32(
glow::TEXTURE_2D,
glow::TEXTURE_WRAP_T,
glow::CLAMP_TO_EDGE as _,
);
gl.tex_parameter_i32(
glow::TEXTURE_2D,
glow::TEXTURE_MIN_FILTER,
glow::LINEAR as _,
);
gl.tex_parameter_i32(
glow::TEXTURE_2D,
glow::TEXTURE_MAG_FILTER,
glow::LINEAR as _,
);
gl.bind_texture(glow::TEXTURE_2D, None);
Some(Entry {
size: Size::new(width, height),
texture,
})
}
}
fn remove(&mut self, entry: &Entry, gl: &mut &glow::Context) {
unsafe { gl.delete_texture(entry.texture) }
}
}
#[derive(Debug)]
pub struct Entry {
size: Size<u32>,
pub(super) texture: glow::NativeTexture,
}
impl image::storage::Entry for Entry {
fn size(&self) -> Size<u32> {
self.size
}
}
|
