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use std::{sync::Arc, thread};
use crate::context::DynContext;
use crate::*;
/// Handle to a texture on the GPU.
///
/// It can be created with [`Device::create_texture`].
///
/// Corresponds to [WebGPU `GPUTexture`](https://gpuweb.github.io/gpuweb/#texture-interface).
#[derive(Debug)]
pub struct Texture {
pub(crate) context: Arc<C>,
pub(crate) data: Box<Data>,
pub(crate) descriptor: TextureDescriptor<'static>,
}
#[cfg(send_sync)]
static_assertions::assert_impl_all!(Texture: Send, Sync);
super::impl_partialeq_eq_hash!(Texture);
impl Texture {
/// Returns the inner hal Texture using a callback. The hal texture will be `None` if the
/// backend type argument does not match with this wgpu Texture
///
/// # Safety
///
/// - The raw handle obtained from the hal Texture must not be manually destroyed
#[cfg(wgpu_core)]
pub unsafe fn as_hal<A: wgc::hal_api::HalApi, F: FnOnce(Option<&A::Texture>) -> R, R>(
&self,
hal_texture_callback: F,
) -> R {
if let Some(ctx) = self
.context
.as_any()
.downcast_ref::<crate::backend::ContextWgpuCore>()
{
unsafe {
ctx.texture_as_hal::<A, F, R>(
crate::context::downcast_ref(self.data.as_ref()),
hal_texture_callback,
)
}
} else {
hal_texture_callback(None)
}
}
/// Creates a view of this texture.
pub fn create_view(&self, desc: &TextureViewDescriptor<'_>) -> TextureView {
let data = DynContext::texture_create_view(&*self.context, self.data.as_ref(), desc);
TextureView {
context: Arc::clone(&self.context),
data,
}
}
/// Destroy the associated native resources as soon as possible.
pub fn destroy(&self) {
DynContext::texture_destroy(&*self.context, self.data.as_ref());
}
/// Make an `ImageCopyTexture` representing the whole texture.
pub fn as_image_copy(&self) -> ImageCopyTexture<'_> {
ImageCopyTexture {
texture: self,
mip_level: 0,
origin: Origin3d::ZERO,
aspect: TextureAspect::All,
}
}
/// Returns the size of this `Texture`.
///
/// This is always equal to the `size` that was specified when creating the texture.
pub fn size(&self) -> Extent3d {
self.descriptor.size
}
/// Returns the width of this `Texture`.
///
/// This is always equal to the `size.width` that was specified when creating the texture.
pub fn width(&self) -> u32 {
self.descriptor.size.width
}
/// Returns the height of this `Texture`.
///
/// This is always equal to the `size.height` that was specified when creating the texture.
pub fn height(&self) -> u32 {
self.descriptor.size.height
}
/// Returns the depth or layer count of this `Texture`.
///
/// This is always equal to the `size.depth_or_array_layers` that was specified when creating the texture.
pub fn depth_or_array_layers(&self) -> u32 {
self.descriptor.size.depth_or_array_layers
}
/// Returns the mip_level_count of this `Texture`.
///
/// This is always equal to the `mip_level_count` that was specified when creating the texture.
pub fn mip_level_count(&self) -> u32 {
self.descriptor.mip_level_count
}
/// Returns the sample_count of this `Texture`.
///
/// This is always equal to the `sample_count` that was specified when creating the texture.
pub fn sample_count(&self) -> u32 {
self.descriptor.sample_count
}
/// Returns the dimension of this `Texture`.
///
/// This is always equal to the `dimension` that was specified when creating the texture.
pub fn dimension(&self) -> TextureDimension {
self.descriptor.dimension
}
/// Returns the format of this `Texture`.
///
/// This is always equal to the `format` that was specified when creating the texture.
pub fn format(&self) -> TextureFormat {
self.descriptor.format
}
/// Returns the allowed usages of this `Texture`.
///
/// This is always equal to the `usage` that was specified when creating the texture.
pub fn usage(&self) -> TextureUsages {
self.descriptor.usage
}
}
impl Drop for Texture {
fn drop(&mut self) {
if !thread::panicking() {
self.context.texture_drop(self.data.as_ref());
}
}
}
/// Describes a [`Texture`].
///
/// For use with [`Device::create_texture`].
///
/// Corresponds to [WebGPU `GPUTextureDescriptor`](
/// https://gpuweb.github.io/gpuweb/#dictdef-gputexturedescriptor).
pub type TextureDescriptor<'a> = wgt::TextureDescriptor<Label<'a>, &'a [TextureFormat]>;
static_assertions::assert_impl_all!(TextureDescriptor<'_>: Send, Sync);