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use crate::error::Error;
use crate::layouts::*;
use crate::{sr, CompiledShader};
use crate::srvk::{DescriptorDescInfo, SpirvTy};
use crate::vk::descriptor::descriptor::*;
use crate::vk::descriptor::pipeline_layout::PipelineLayoutDescPcRange;
use crate::vk::pipeline::shader::ShaderInterfaceDefEntry;
use crate::CompiledShaders;
use std::borrow::Cow;
use std::collections::HashMap;
use std::convert::TryFrom;
pub struct ShaderInterfaces {
pub inputs: Vec<ShaderInterfaceDefEntry>,
pub outputs: Vec<ShaderInterfaceDefEntry>,
}
#[derive(Debug, Clone, Default)]
pub struct LayoutData {
pub num_sets: usize,
pub num_bindings: HashMap<usize, usize>,
pub descriptions: HashMap<usize, HashMap<usize, DescriptorDesc>>,
pub num_constants: usize,
pub pc_ranges: Vec<PipelineLayoutDescPcRange>,
}
pub fn create_entry(spirv: &Vec<u32>) -> Result<Entry, Error> {
let vertex_interfaces = create_interfaces(spirv)?;
let vertex_layout = create_layouts(spirv)?;
let input = Some(Input {
inputs: vertex_interfaces.inputs,
});
let output = Some(Output {
outputs: vertex_interfaces.outputs,
});
let layout = Layout {
layout_data: vertex_layout,
};
Ok(Entry {
input,
output,
layout,
})
}
pub fn create_compute_entry(spirv: &Vec<u32>) -> Result<Entry, Error> {
let compute_layout = create_layouts(spirv)?;
let layout = Layout {
layout_data: compute_layout,
};
Ok(Entry {
input: None,
output: None,
layout,
})
}
fn create_interfaces(data: &[u32]) -> Result<ShaderInterfaces, Error> {
sr::ShaderModule::load_u32_data(data)
.map_err(|e| Error::LoadingData(e.to_string()))
.map(|m| {
let inputs = m
.enumerate_input_variables(None)
.map_err(|e| Error::LoadingData(e.to_string()))
.and_then(|inputs| {
inputs
.iter()
.filter(|i| {
!i.decoration_flags
.contains(sr::types::ReflectDecorationFlags::BUILT_IN)
})
.map(|i| Ok(ShaderInterfaceDefEntry {
location: i.location..(i.location + 1),
format: SpirvTy::try_from(i.format)?.inner(),
name: Some(Cow::from(i.name.clone())),
}))
.collect::<Result<Vec<ShaderInterfaceDefEntry>, _>>()
});
let outputs = m
.enumerate_output_variables(None)
.map_err(|e| Error::LoadingData(e.to_string()))
.and_then(|outputs| {
outputs
.iter()
.filter(|i| {
!i.decoration_flags
.contains(sr::types::ReflectDecorationFlags::BUILT_IN)
})
.map(|i| Ok(ShaderInterfaceDefEntry {
location: i.location..(i.location + 1),
format: SpirvTy::try_from(i.format)?.inner(),
name: Some(Cow::from(i.name.clone())),
}))
.collect::<Result<Vec<ShaderInterfaceDefEntry>, _>>()
});
inputs.and_then(|inputs| outputs.map(|outputs| ShaderInterfaces { inputs, outputs } ))
})
.and_then(|t| t)
}
fn create_layouts(data: &[u32]) -> Result<LayoutData, Error> {
let mut ret = sr::ShaderModule::load_u32_data(data);
ret.map(|m| {
let descs: Result<_, Error> = m
.enumerate_descriptor_sets(None)
.map_err(|e| Error::LoadingData(e.to_string()))
.and_then(|sets| {
let num_sets = sets.len();
let num_bindings = sets
.iter()
.map(|i| (i.set as usize, i.bindings.len()))
.collect::<HashMap<usize, usize>>();
let descriptions = sets
.iter()
.map(|i| {
let desc = i
.bindings
.iter()
.map(|b| {
let info = DescriptorDescInfo {
descriptor_type: b.descriptor_type,
image: b.image,
};
let ty = SpirvTy::<DescriptorDescTy>::try_from(info)?.inner();
let stages = ShaderStages::none();
let d = DescriptorDesc {
ty,
array_count: b.count,
stages,
readonly: true,
};
Ok((b.binding as usize, d))
})
.collect::<Result<HashMap<usize, DescriptorDesc>, Error>>();
desc.and_then(|d| Ok((i.set as usize, d)))
})
.collect::<Result<HashMap<usize, _>, Error>>();
descriptions.map(|d| (num_sets, num_bindings, d))
});
let pcs = m
.enumerate_push_constant_blocks(None)
.map_err(|e| Error::LoadingData(e.to_string()))
.map(|constants| {
let num_constants = constants.len();
let pc_ranges = constants
.iter()
.map(|pc| PipelineLayoutDescPcRange {
offset: pc.offset as usize,
size: pc.size as usize,
stages: ShaderStages::all(),
})
.collect::<Vec<PipelineLayoutDescPcRange>>();
(num_constants, pc_ranges)
});
descs.and_then(|(num_sets, num_bindings, descriptions)| {
pcs.map(|(num_constants, pc_ranges)| LayoutData {
num_sets,
num_bindings,
descriptions,
num_constants,
pc_ranges,
})
})
})
.map_err(|e| Error::LoadingData(e.to_string()))
.and_then(|t| t)
}