82 lines
2.5 KiB
Rust
82 lines
2.5 KiB
Rust
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use crate::ffi::{
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SPIRV_MAGIC, SPIRV_VERSION_1_0, TRIANGLE_FRAGMENT_SHADER_WORDS, TRIANGLE_VERTEX_SHADER_WORDS,
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};
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/// Error found while checking a checked-in SPIR-V module.
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#[derive(Clone, Debug, Eq, PartialEq)]
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pub enum VulkanShaderError {
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/// SPIR-V module is too short to contain a header.
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TooShort {
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/// Shader name.
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name: &'static str,
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},
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/// SPIR-V module has an invalid magic word.
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InvalidMagic {
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/// Shader name.
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name: &'static str,
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/// Found magic word.
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found: u32,
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},
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/// SPIR-V module version is below 1.0.
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UnsupportedVersion {
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/// Shader name.
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name: &'static str,
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/// Found version word.
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found: u32,
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},
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/// SPIR-V module declares an invalid bound.
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InvalidBound {
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/// Shader name.
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name: &'static str,
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},
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}
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impl std::fmt::Display for VulkanShaderError {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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Self::TooShort { name } => write!(f, "shader {name} SPIR-V module is too short"),
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Self::InvalidMagic { name, found } => {
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write!(f, "shader {name} has invalid SPIR-V magic 0x{found:08x}")
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}
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Self::UnsupportedVersion { name, found } => write!(
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f,
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"shader {name} has unsupported SPIR-V version 0x{found:08x}"
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),
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Self::InvalidBound { name } => write!(f, "shader {name} has invalid SPIR-V bound"),
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}
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}
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}
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impl std::error::Error for VulkanShaderError {}
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/// Checks the checked-in triangle shader containers before creating a pipeline.
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pub(crate) fn validate_triangle_shaders() -> Result<(), VulkanShaderError> {
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validate_spirv_container("triangle.vert", TRIANGLE_VERTEX_SHADER_WORDS)?;
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validate_spirv_container("triangle.frag", TRIANGLE_FRAGMENT_SHADER_WORDS)?;
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Ok(())
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}
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pub(crate) fn validate_spirv_container(
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name: &'static str,
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words: &[u32],
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) -> Result<(), VulkanShaderError> {
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if words.len() < 5 {
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return Err(VulkanShaderError::TooShort { name });
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}
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if words[0] != SPIRV_MAGIC {
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return Err(VulkanShaderError::InvalidMagic {
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name,
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found: words[0],
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});
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}
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if words[1] < SPIRV_VERSION_1_0 {
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return Err(VulkanShaderError::UnsupportedVersion {
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name,
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found: words[1],
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});
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}
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if words[3] == 0 {
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return Err(VulkanShaderError::InvalidBound { name });
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}
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Ok(())
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}
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