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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

use dom_struct::dom_struct;
use euclid::Size2D;
use webxr_api::Viewport;

use crate::dom::bindings::codegen::Bindings::XRWebGLSubImageBinding::XRWebGLSubImage_Binding::XRWebGLSubImageMethods;
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::webgltexture::WebGLTexture;
use crate::dom::xrsubimage::XRSubImage;

#[dom_struct]
pub struct XRWebGLSubImage {
    xr_sub_image: XRSubImage,
    color_texture: Dom<WebGLTexture>,
    depth_stencil_texture: Option<Dom<WebGLTexture>>,
    image_index: Option<u32>,
    #[no_trace]
    size: Size2D<u32, Viewport>,
}

impl XRWebGLSubImageMethods for XRWebGLSubImage {
    /// <https://immersive-web.github.io/layers/#dom-xrwebglsubimage-colortexture>
    fn ColorTexture(&self) -> DomRoot<WebGLTexture> {
        DomRoot::from_ref(&self.color_texture)
    }

    /// <https://immersive-web.github.io/layers/#dom-xrwebglsubimage-depthstenciltexture>
    fn GetDepthStencilTexture(&self) -> Option<DomRoot<WebGLTexture>> {
        self.depth_stencil_texture.as_deref().map(DomRoot::from_ref)
    }

    /// <https://immersive-web.github.io/layers/#dom-xrwebglsubimage-imageindex>
    fn GetImageIndex(&self) -> Option<u32> {
        self.image_index
    }

    /// <https://immersive-web.github.io/layers/#dom-xrwebglsubimage-texturewidth>
    fn TextureWidth(&self) -> u32 {
        self.size.width
    }

    /// <https://immersive-web.github.io/layers/#dom-xrwebglsubimage-textureheight>
    fn TextureHeight(&self) -> u32 {
        self.size.height
    }
}