Struct wgpu::naga::back::glsl::PushConstantItem

pub struct PushConstantItem {
    pub access_path: String,
    pub ty: Handle<Type>,
    pub offset: u32,
}

All information to bind a single uniform value to the shader.

Push constants are emulated using traditional uniforms in OpenGL.

These are composed of a set of primatives (scalar, vector, matrix) that are given names. Because they are not backed by the concept of a buffer, we must do the work of calculating the offset of each primative in the push constant block.

Fields

access_path: String

GL uniform name for the item. This name is the same as if you were to access it directly from a GLSL shader.

The with the following example, the following names will be generated, one name per GLSL uniform.

struct InnerStruct {
    value: f32,
}

struct PushConstant {
    InnerStruct inner;
    vec4 array[2];
}

uniform PushConstants _push_constant_binding_cs;

- _push_constant_binding_cs.inner.value
- _push_constant_binding_cs.array[0]
- _push_constant_binding_cs.array[1]

ty: Handle<Type>

Type of the uniform. This will only ever be a scalar, vector, or matrix.

offset: u32

The offset in the push constant memory block this uniform maps to.

The size of the uniform can be derived from the type.

Trait Implementations

impl Clone for PushConstantItem

fn clone(&self) -> PushConstantItem

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PushConstantItem

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

Formats the value using the given formatter.