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https://github.com/vulkano-rs/vulkano.git
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Extract entry point generation to own module
This commit is contained in:
Pierre Krieger
parent
d182fcba49
commit
ad27205f7b
142
vulkano-shaders/src/entry_point.rs
Normal file
142
vulkano-shaders/src/entry_point.rs
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@ -0,0 +1,142 @@
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// Copyright (c) 2016 The vulkano developers
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// Licensed under the Apache License, Version 2.0
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// <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT
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// license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
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// at your option. All files in the project carrying such
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// notice may not be copied, modified, or distributed except
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// according to those terms.
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use enums;
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use parse;
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use is_builtin;
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use name_from_id;
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use location_decoration;
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use type_from_id;
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use format_from_id;
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pub fn write_entry_point(doc: &parse::Spirv, instruction: &parse::Instruction) -> String {
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let (execution, ep_name, interface) = match instruction {
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&parse::Instruction::EntryPoint { ref execution, id, ref name, ref interface } => {
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(execution, name, interface)
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},
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_ => unreachable!()
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};
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let (ty, f_call) = match *execution {
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enums::ExecutionModel::ExecutionModelVertex => {
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let mut attributes = Vec::new();
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for interface in interface.iter() {
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for i in doc.instructions.iter() {
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match i {
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&parse::Instruction::Variable { result_type_id, result_id,
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storage_class: enums::StorageClass::StorageClassInput, .. }
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if &result_id == interface =>
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{
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if is_builtin(doc, result_id) {
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continue;
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}
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let name = name_from_id(doc, result_id);
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let loc = match location_decoration(doc, result_id) {
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Some(l) => l,
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None => panic!("vertex attribute `{}` is missing a location", name)
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};
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attributes.push((loc, name, format_from_id(doc, result_type_id)));
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},
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_ => ()
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}
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}
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}
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// Checking for overlapping attributes.
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for (offset, &(loc, ref name, (_, loc_len))) in attributes.iter().enumerate() {
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for &(loc2, ref name2, (_, loc_len2)) in attributes.iter().skip(offset + 1) {
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if loc == loc2 || (loc < loc2 && loc + loc_len as u32 > loc2) ||
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(loc2 < loc && loc2 + loc_len2 as u32 > loc)
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{
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panic!("The locations of vertex attributes `{}` and `{}` overlap",
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name, name2);
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}
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}
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}
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let attributes = attributes.iter().map(|&(loc, ref name, (ref ty, num_locs))| {
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assert!(num_locs >= 1);
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format!("::vulkano::pipeline::shader::ShaderInterfaceDefEntry {{
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location: {} .. {},
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format: ::vulkano::format::Format::{},
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name: Some(::std::borrow::Cow::Borrowed(\"{}\"))
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}}", loc, loc as usize + num_locs, ty, name)
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}).collect::<Vec<_>>().join(", ");
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let t = "::vulkano::pipeline::shader::VertexShaderEntryPoint<(), Vec<::vulkano::pipeline::shader::ShaderInterfaceDefEntry>, Layout>".to_owned();
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let f = format!("vertex_shader_entry_point(::std::ffi::CStr::from_ptr(NAME.as_ptr() as *const _), Layout, vec![{}])", attributes);
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(t, f)
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},
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enums::ExecutionModel::ExecutionModelTessellationControl => {
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(format!("::vulkano::pipeline::shader::TessControlShaderEntryPoint"), String::new())
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},
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enums::ExecutionModel::ExecutionModelTessellationEvaluation => {
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(format!("::vulkano::pipeline::shader::TessEvaluationShaderEntryPoint"), String::new())
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},
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enums::ExecutionModel::ExecutionModelGeometry => {
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(format!("::vulkano::pipeline::shader::GeometryShaderEntryPoint"), String::new())
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},
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enums::ExecutionModel::ExecutionModelFragment => {
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let mut output_types = Vec::new();
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for interface in interface.iter() {
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for i in doc.instructions.iter() {
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match i {
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&parse::Instruction::Variable { result_type_id, result_id,
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storage_class: enums::StorageClass::StorageClassOutput, .. }
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if &result_id == interface =>
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{
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output_types.push(type_from_id(doc, result_type_id));
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},
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_ => ()
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}
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}
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}
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let output = {
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let output = output_types.join(", ");
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if output.is_empty() { output } else { output + "," }
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};
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let t = format!("::vulkano::pipeline::shader::FragmentShaderEntryPoint<(), ({output}), Layout>",
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output = output);
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(t, format!("fragment_shader_entry_point(::std::ffi::CStr::from_ptr(NAME.as_ptr() as *const _), Layout)"))
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},
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enums::ExecutionModel::ExecutionModelGLCompute => {
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(format!("::vulkano::pipeline::shader::ComputeShaderEntryPoint<(), Layout>"),
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format!("compute_shader_entry_point(::std::ffi::CStr::from_ptr(NAME.as_ptr() as *const _), Layout)"))
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},
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enums::ExecutionModel::ExecutionModelKernel => panic!("Kernels are not supported"),
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};
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format!(r#"
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/// Returns a logical struct describing the entry point named `{ep_name}`.
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#[inline]
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pub fn {ep_name}_entry_point(&self) -> {ty} {{
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unsafe {{
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#[allow(dead_code)]
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static NAME: [u8; {ep_name_lenp1}] = [{encoded_ep_name}, 0]; // "{ep_name}"
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self.shader.{f_call}
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}}
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}}
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"#, ep_name = ep_name, ep_name_lenp1 = ep_name.chars().count() + 1, ty = ty,
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encoded_ep_name = ep_name.chars().map(|c| (c as u32).to_string())
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.collect::<Vec<String>>().join(", "),
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f_call = f_call)
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}
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@ -21,6 +21,7 @@ pub use parse::ParseError;
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pub use glsl_to_spirv::ShaderType;
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mod descriptor_sets;
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mod entry_point;
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mod enums;
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mod parse;
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mod structs;
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@ -137,7 +138,7 @@ impl {name} {{
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// writing one method for each entry point of this module
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for instruction in doc.instructions.iter() {
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if let &parse::Instruction::EntryPoint { .. } = instruction {
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output.push_str(&write_entry_point(&doc, instruction));
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output.push_str(&entry_point::write_entry_point(&doc, instruction));
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}
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}
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@ -178,131 +179,6 @@ impl From<ParseError> for Error {
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}
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}
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fn write_entry_point(doc: &parse::Spirv, instruction: &parse::Instruction) -> String {
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let (execution, ep_name, interface) = match instruction {
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&parse::Instruction::EntryPoint { ref execution, id, ref name, ref interface } => {
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(execution, name, interface)
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},
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_ => unreachable!()
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};
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let (ty, f_call) = match *execution {
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enums::ExecutionModel::ExecutionModelVertex => {
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let mut attributes = Vec::new();
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for interface in interface.iter() {
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for i in doc.instructions.iter() {
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match i {
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&parse::Instruction::Variable { result_type_id, result_id,
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storage_class: enums::StorageClass::StorageClassInput, .. }
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if &result_id == interface =>
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{
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if is_builtin(doc, result_id) {
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continue;
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}
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let name = name_from_id(doc, result_id);
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let loc = match location_decoration(doc, result_id) {
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Some(l) => l,
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None => panic!("vertex attribute `{}` is missing a location", name)
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};
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attributes.push((loc, name, format_from_id(doc, result_type_id)));
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},
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_ => ()
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}
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}
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}
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// Checking for overlapping attributes.
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for (offset, &(loc, ref name, (_, loc_len))) in attributes.iter().enumerate() {
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for &(loc2, ref name2, (_, loc_len2)) in attributes.iter().skip(offset + 1) {
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if loc == loc2 || (loc < loc2 && loc + loc_len as u32 > loc2) ||
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(loc2 < loc && loc2 + loc_len2 as u32 > loc)
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{
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panic!("The locations of vertex attributes `{}` and `{}` overlap",
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name, name2);
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}
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}
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}
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let attributes = attributes.iter().map(|&(loc, ref name, (ref ty, num_locs))| {
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assert!(num_locs >= 1);
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format!("::vulkano::pipeline::shader::ShaderInterfaceDefEntry {{
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location: {} .. {},
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format: ::vulkano::format::Format::{},
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name: Some(::std::borrow::Cow::Borrowed(\"{}\"))
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}}", loc, loc as usize + num_locs, ty, name)
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}).collect::<Vec<_>>().join(", ");
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let t = "::vulkano::pipeline::shader::VertexShaderEntryPoint<(), Vec<::vulkano::pipeline::shader::ShaderInterfaceDefEntry>, Layout>".to_owned();
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let f = format!("vertex_shader_entry_point(::std::ffi::CStr::from_ptr(NAME.as_ptr() as *const _), Layout, vec![{}])", attributes);
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(t, f)
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},
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enums::ExecutionModel::ExecutionModelTessellationControl => {
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(format!("::vulkano::pipeline::shader::TessControlShaderEntryPoint"), String::new())
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},
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enums::ExecutionModel::ExecutionModelTessellationEvaluation => {
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(format!("::vulkano::pipeline::shader::TessEvaluationShaderEntryPoint"), String::new())
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},
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enums::ExecutionModel::ExecutionModelGeometry => {
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(format!("::vulkano::pipeline::shader::GeometryShaderEntryPoint"), String::new())
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},
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enums::ExecutionModel::ExecutionModelFragment => {
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let mut output_types = Vec::new();
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for interface in interface.iter() {
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for i in doc.instructions.iter() {
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match i {
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&parse::Instruction::Variable { result_type_id, result_id,
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storage_class: enums::StorageClass::StorageClassOutput, .. }
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if &result_id == interface =>
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{
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output_types.push(type_from_id(doc, result_type_id));
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},
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_ => ()
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}
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}
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}
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let output = {
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let output = output_types.join(", ");
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if output.is_empty() { output } else { output + "," }
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};
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let t = format!("::vulkano::pipeline::shader::FragmentShaderEntryPoint<(), ({output}), Layout>",
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output = output);
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(t, format!("fragment_shader_entry_point(::std::ffi::CStr::from_ptr(NAME.as_ptr() as *const _), Layout)"))
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},
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enums::ExecutionModel::ExecutionModelGLCompute => {
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(format!("::vulkano::pipeline::shader::ComputeShaderEntryPoint<(), Layout>"),
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format!("compute_shader_entry_point(::std::ffi::CStr::from_ptr(NAME.as_ptr() as *const _), Layout)"))
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},
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enums::ExecutionModel::ExecutionModelKernel => panic!("Kernels are not supported"),
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};
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format!(r#"
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/// Returns a logical struct describing the entry point named `{ep_name}`.
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#[inline]
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pub fn {ep_name}_entry_point(&self) -> {ty} {{
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unsafe {{
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#[allow(dead_code)]
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static NAME: [u8; {ep_name_lenp1}] = [{encoded_ep_name}, 0]; // "{ep_name}"
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self.shader.{f_call}
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}}
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}}
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"#, ep_name = ep_name, ep_name_lenp1 = ep_name.chars().count() + 1, ty = ty,
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encoded_ep_name = ep_name.chars().map(|c| (c as u32).to_string())
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.collect::<Vec<String>>().join(", "),
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f_call = f_call)
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}
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/// Returns the vulkano `Format` and number of occupied locations from an id.
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fn format_from_id(doc: &parse::Spirv, searched: u32) -> (String, usize) {
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for instruction in doc.instructions.iter() {
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