Method create_render_texture

native/shared/src/renderer/mod.rs:6264–6288

Q1: Create a render texture and register it for sampling via drawTexture. Returns (bind_group_index, texture_vec_index).

(&mut self, width: u32, height: u32)

    /// Q1: Create a render texture and register it for sampling via drawTexture.
    /// Returns (bind_group_index, texture_vec_index).
    pub fn create_render_texture(&mut self, width: u32, height: u32) -> (u32, usize) {
        let texture = self.device.create_texture(&wgpu::TextureDescriptor {
            label: Some("render_texture"),
            size: wgpu::Extent3d { width, height, depth_or_array_layers: 1 },
            mip_level_count: 1, sample_count: 1,
            dimension: wgpu::TextureDimension::D2,
            format: self.surface_config.format,
            usage: wgpu::TextureUsages::RENDER_ATTACHMENT | wgpu::TextureUsages::TEXTURE_BINDING,
            view_formats: &[],
        });
        let tex_view = texture.create_view(&wgpu::TextureViewDescriptor::default());
        let bind_group = self.device.create_bind_group(&wgpu::BindGroupDescriptor {
            label: Some("rt_bg"), layout: &self.texture_bind_group_layout,
            entries: &[
                wgpu::BindGroupEntry { binding: 0, resource: wgpu::BindingResource::TextureView(&tex_view) },
                wgpu::BindGroupEntry { binding: 1, resource: wgpu::BindingResource::Sampler(&self.sampler) },
            ],
        });
        let idx = self.texture_bind_groups.len() as u32;
        let tex_idx = self.textures.len();
        self.texture_bind_groups.push(bind_group);
        self.textures.push(texture);
        self.texture_sizes.push((width, height));
        (idx, tex_idx)
    }

    /// Q1: Get a reference to an internal texture by index.
    pub fn get_texture_ref(&self, index: usize) -> Option<&wgpu::Texture> {