Struct spirv_cross2::compile::glsl::CompilerOptions

#[non_exhaustive]
pub struct CompilerOptions {

    pub common: CommonOptions,
    pub version: GlslVersion,
    pub vulkan_semantics: bool,
    pub seperate_shader_objects: bool,
    pub enable_420pack_extension: bool,
    pub support_nonzero_base_instance: bool,
    pub es_default_float_precision_highp: bool,
    pub es_default_int_precision_highp: bool,
    pub emit_push_constant_as_uniform_buffer: bool,
    pub emit_uniform_buffer_as_plain_uniforms: bool,
    pub force_flattened_io_blocks: bool,
    pub enable_row_major_load_workaround: bool,
    pub ovr_multiview_view_count: u32,
}

Available on crate feature glsl only.

GLSL compiler options.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

common: CommonOptions

Compile options common to GLSL, HLSL, and MSL.

version: GlslVersion

The GLSL version to output. The default is #version 450.

vulkan_semantics: bool

If true, Vulkan GLSL features are used instead of GL-compatible features. Mostly useful for debugging SPIR-V files.

seperate_shader_objects: bool

If true, gl_PerVertex is explicitly redeclared in vertex, geometry and tessellation shaders. The members of gl_PerVertex is determined by which built-ins are declared by the shader. This option is ignored in ES versions, as redeclaration in ES is not required, and it depends on a different extension (EXT_shader_io_blocks) which makes things a bit more fuzzy.

enable_420pack_extension: bool

For older desktop GLSL targets than version 420, the GL_ARB_shading_language_420pack extensions is used to be able to support layout(binding) on UBOs and samplers. If disabled on older targets, binding decorations will be stripped.

The default is true.

support_nonzero_base_instance: bool

If true, the backend will assume that InstanceIndex will need to apply a base instance offset. Set to false if you know you will never use base instance functionality as it might remove some internal uniforms.

es_default_float_precision_highp: bool

If true, sets the default float precision in ES targets to highp, otherwise the default is mediump.

es_default_int_precision_highp: bool

If false, sets the default float precision in ES targets to mediump, otherwise the default is highp.

emit_push_constant_as_uniform_buffer: bool

In non-Vulkan GLSL, emit push constant blocks as UBOs rather than plain uniforms.

emit_uniform_buffer_as_plain_uniforms: bool

Always emit uniform blocks as plain uniforms, regardless of the GLSL version, even when UBOs are supported. Does not apply to shader storage or push constant blocks.

force_flattened_io_blocks: bool

In GLSL, force use of I/O block flattening, similar to what happens on legacy GLSL targets for blocks and structs.

enable_row_major_load_workaround: bool

Loading row-major matrices from UBOs on older AMD Windows OpenGL drivers is problematic. To load these types correctly, we must generate a wrapper. them in a dummy function which only purpose is to ensure row_major decoration is actually respected. This workaround may cause significant performance degeneration on some Android devices.

ovr_multiview_view_count: u32

If non-zero, controls layout(num_views = N) in; in GL_OVR_multiview2.

Trait Implementations

impl Debug for CompilerOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CompilerOptions

fn default() -> Self

Returns the “default value” for a type.

impl CompilerOptions for CompilerOptions