lgpu 0.1.1

Ultra-lightweight, bindless-first cross-platform GPU abstraction
Documentation 
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//! GPU texture, image views, and samplers.

use crate::TextureFormat;
use std::sync::Arc;

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct TextureId(pub u32);

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct SamplerId(pub u32);

pub struct Texture {
    pub(crate) hal_texture: Option<lgpu_hal::vulkan::VulkanTexture>,
    pub(crate) vulkan_device: Arc<lgpu_hal::vulkan::VulkanDevice>,
    pub width: u32,
    pub height: u32,
    pub format: TextureFormat,
    pub id: Option<TextureId>,
    pub storage_id: Option<TextureId>,
    pub owned: bool,
}

impl std::fmt::Debug for Texture {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("Texture")
            .field("width", &self.width)
            .field("height", &self.height)
            .field("format", &self.format)
            .field("id", &self.id)
            .field("storage_id", &self.storage_id)
            .field("owned", &self.owned)
            .finish()
    }
}

pub struct Sampler {
    pub(crate) hal_sampler: Option<lgpu_hal::vulkan::VulkanSampler>,
    pub(crate) vulkan_device: Arc<lgpu_hal::vulkan::VulkanDevice>,
    pub id: Option<SamplerId>,
}

impl std::fmt::Debug for Sampler {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("Sampler").field("id", &self.id).finish()
    }
}

impl Texture {
    pub fn id(&self) -> Option<TextureId> {
        self.id
    }

    pub fn storage_id(&self) -> Option<TextureId> {
        self.storage_id
    }

    pub fn is_owned(&self) -> bool {
        self.owned
    }

    pub fn clone_unowned(&self) -> Self {
        Self {
            hal_texture: self
                .hal_texture
                .as_ref()
                .map(|t| lgpu_hal::vulkan::VulkanTexture {
                    image: t.image,
                    view: t.view,
                    memory: t.memory,
                    block_id: t.block_id,
                    offset: t.offset,
                    allocated_size: t.allocated_size,
                    layout: std::sync::Mutex::new(t.current_layout()),
                    width: t.width,
                    height: t.height,
                    mip_levels: t.mip_levels,
                    sample_count: t.sample_count,
                    format: t.format,
                    owned: false,
                }),
            vulkan_device: Arc::clone(&self.vulkan_device),
            width: self.width,
            height: self.height,
            format: self.format,
            id: self.id,
            storage_id: self.storage_id,
            owned: false,
        }
    }
}

impl Sampler {
    pub fn id(&self) -> Option<SamplerId> {
        self.id
    }
}

impl Drop for Texture {
    fn drop(&mut self) {
        if self.owned {
            if let Some(tex_id) = self.id {
                self.vulkan_device.unregister_bindless_texture(tex_id.0);
            }
            if let Some(storage_id) = self.storage_id {
                self.vulkan_device
                    .unregister_bindless_storage_image(storage_id.0);
            }
            if let Some(tex) = self.hal_texture.take() {
                self.vulkan_device.destroy_texture(tex);
            }
        }
    }
}

impl Drop for Sampler {
    fn drop(&mut self) {
        if let Some(sampler_id) = self.id {
            self.vulkan_device.unregister_bindless_sampler(sampler_id.0);
        }
        if let Some(sampler) = self.hal_sampler.take() {
            self.vulkan_device.destroy_sampler(sampler);
        }
    }
}