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// Copyright (c) 2016 The vulkano developers
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT
// license <LICENSE-MIT or https://opensource.org/licenses/MIT>,
// at your option. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
use super::VertexBufferDescription;
use crate::{
pipeline::graphics::vertex_input::{
IncompatibleVertexDefinitionError, Vertex, VertexDefinition, VertexInputState,
},
shader::ShaderInterface,
};
/// A vertex definition for any number of vertex and instance buffers.
#[deprecated(
since = "0.33.0",
note = "Use `VertexBufferDescription` directly instead as returned by `Vertex::per_vertex` or `Vertex::per_instance`"
)]
#[derive(Clone, Debug, Default)]
pub struct BuffersDefinition(Vec<VertexBufferDescription>);
#[allow(deprecated)]
impl BuffersDefinition {
/// Constructs a new definition.
#[inline]
pub fn new() -> Self {
BuffersDefinition(Vec::new())
}
/// Adds a new vertex buffer containing elements of type `V` to the definition.
pub fn vertex<V: Vertex>(mut self) -> Self {
self.0.push(V::per_vertex());
self
}
/// Adds a new instance buffer containing elements of type `V` to the definition.
pub fn instance<V: Vertex>(mut self) -> Self {
self.0.push(V::per_instance());
self
}
/// Adds a new instance buffer containing elements of type `V` to the definition, with the
/// specified input rate divisor.
///
/// This requires the [`vertex_attribute_instance_rate_divisor`] feature has been enabled on
/// the device, unless `divisor` is 1.
///
/// `divisor` can be 0 if the [`vertex_attribute_instance_rate_zero_divisor`] feature is also
/// enabled. This means that every vertex will use the same vertex and instance data.
///
/// [`vertex_attribute_instance_rate_divisor`]: crate::device::Features::vertex_attribute_instance_rate_divisor
/// [`vertex_attribute_instance_rate_zero_divisor`]: crate::device::Features::vertex_attribute_instance_rate_zero_divisor
pub fn instance_with_divisor<V: Vertex>(mut self, divisor: u32) -> Self {
self.0.push(V::per_instance_with_divisor(divisor));
self
}
}
#[allow(deprecated)]
unsafe impl VertexDefinition for BuffersDefinition {
#[inline]
fn definition(
&self,
interface: &ShaderInterface,
) -> Result<VertexInputState, IncompatibleVertexDefinitionError> {
self.0.definition(interface)
}
}
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