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use std::sync::Arc;
use std::marker::PhantomData;
use vks;
use ::{VdResult, Device, DescriptorSetLayoutHandle, Handle,
PipelineLayoutCreateInfo, PushConstantRange};
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
#[repr(C)]
pub struct PipelineLayoutHandle(pub(crate) vks::VkPipelineLayout);
impl PipelineLayoutHandle {
#[inline(always)]
pub fn to_raw(&self) -> vks::VkPipelineLayout {
self.0
}
}
unsafe impl Handle for PipelineLayoutHandle {
type Target = PipelineLayoutHandle;
/// Returns this object's handle.
#[inline(always)]
fn handle(&self) -> Self::Target {
*self
}
}
#[derive(Debug)]
struct Inner {
handle: PipelineLayoutHandle,
device: Device,
}
impl Drop for Inner {
fn drop(&mut self) {
unsafe {
self.device.destroy_pipeline_layout(self.handle, None);
}
}
}
/// A pipeline layout.
///
///
/// ### Destruction
///
/// Dropping this `PipelineLayout` will cause `Device::destroy_pipeline_layout` to be called,
/// automatically releasing any resources associated with it.
///
#[derive(Debug, Clone)]
pub struct PipelineLayout {
inner: Arc<Inner>,
}
impl PipelineLayout {
/// Returns a new `PipelineLayoutBuilder`.
pub fn builder<'b>() -> PipelineLayoutBuilder<'b> {
PipelineLayoutBuilder::new()
}
/// Returns this object's handle.
pub fn handle(&self) -> PipelineLayoutHandle {
self.inner.handle
}
/// Returns a reference to the associated device.
pub fn device(&self) -> &Device {
&self.inner.device
}
}
unsafe impl<'h> Handle for &'h PipelineLayout {
type Target = PipelineLayoutHandle;
#[inline(always)]
fn handle(&self) -> Self::Target {
self.inner.handle
}
}
/// A builder for `PipelineLayout`.
#[derive(Debug, Clone)]
pub struct PipelineLayoutBuilder<'b> {
create_info: PipelineLayoutCreateInfo<'b>,
_p: PhantomData<&'b ()>,
}
impl<'b> PipelineLayoutBuilder<'b> {
/// Returns a new render pass builder.
pub fn new() -> PipelineLayoutBuilder<'b> {
PipelineLayoutBuilder {
create_info: PipelineLayoutCreateInfo::default(),
_p: PhantomData,
}
}
/// Specifies a list of VkDescriptorSetLayout objects.
pub fn set_layouts<'s, 'p>(&'s mut self,
set_layouts: &'p [DescriptorSetLayoutHandle])
-> &'s mut PipelineLayoutBuilder<'b>
where 'p: 'b {
// self.create_info.setLayoutCount = set_layouts.len() as u32;
// self.create_info.pSetLayouts = set_layouts.as_ptr() as *const vks::VkDescriptorSetLayout;
self.create_info.set_set_layouts(set_layouts);
self
}
/// Specifies a list of VkPushConstantRange structures defining a set of
/// push constant ranges for use in a single pipeline layout. In addition
/// to descriptor set layouts, a pipeline layout also describes how many
/// push constants can be accessed by each stage of the pipeline.
/// Specifies a list of VkDescriptorSetLayout objects.
pub fn push_constant_ranges<'s, 'p>(&'s mut self,
push_constant_ranges: &'p [PushConstantRange])
-> &'s mut PipelineLayoutBuilder<'b>
where 'p: 'b {
// self.create_info.pushConstantRangeCount = push_constant_ranges.len() as u32;
// self.create_info.pPushConstantRanges = push_constant_ranges.as_ptr();
self.create_info.set_push_constant_ranges(push_constant_ranges);
self
}
/// Creates and returns a new `PipelineLayout`
pub fn build(&self, device: Device) -> VdResult<PipelineLayout> {
let handle = unsafe { device.create_pipeline_layout(&self.create_info, None)? };
Ok(PipelineLayout {
inner: Arc::new(Inner {
handle,
device,
})
})
}
}