roast2d_internal 0.4.0

use hashbrown::HashMap;

use crate::platform::types::TextureResource;

#[derive(Default)]
pub struct TextureCache {
    map: HashMap<u64, TextureResource>,
}

impl TextureCache {
    pub fn insert(&mut self, id: u64, res: TextureResource) {
        self.map.insert(id, res);
    }
    pub fn remove(&mut self, id: &u64) {
        self.map.remove(id);
    }
    pub fn get(&self, id: &u64) -> Option<&TextureResource> {
        self.map.get(id)
    }

    pub fn create_texture(
        device: &wgpu::Device,
        queue: &wgpu::Queue,
        img: image::DynamicImage,
    ) -> TextureResource {
        let rgba = img.to_rgba8();
        let (width, height) = rgba.dimensions();
        let size = wgpu::Extent3d {
            width,
            height,
            depth_or_array_layers: 1,
        };
        let texture = device.create_texture(&wgpu::TextureDescriptor {
            label: Some("texture"),
            size,
            mip_level_count: 1,
            sample_count: 1,
            dimension: wgpu::TextureDimension::D2,
            format: wgpu::TextureFormat::Rgba8UnormSrgb,
            usage: wgpu::TextureUsages::COPY_DST | wgpu::TextureUsages::TEXTURE_BINDING,
            view_formats: &[],
        });
        // Write texture data with explicit layout
        queue.write_texture(
            wgpu::TexelCopyTextureInfo {
                texture: &texture,
                mip_level: 0,
                origin: wgpu::Origin3d::ZERO,
                aspect: wgpu::TextureAspect::All,
            },
            &rgba,
            wgpu::TexelCopyBufferLayout {
                offset: 0,
                bytes_per_row: Some(4 * width),
                rows_per_image: Some(height),
            },
            size,
        );
        let view = texture.create_view(&wgpu::TextureViewDescriptor::default());
        let sampler = device.create_sampler(&wgpu::SamplerDescriptor::default());
        TextureResource {
            texture,
            view,
            sampler,
        }
    }

    pub fn create_raw_texture(device: &wgpu::Device, texture: wgpu::Texture) -> TextureResource {
        let view = texture.create_view(&wgpu::TextureViewDescriptor::default());
        let sampler = device.create_sampler(&wgpu::SamplerDescriptor::default());
        TextureResource {
            texture,
            view,
            sampler,
        }
    }
}