opensubdiv-petite 0.3.1

Wrapper around parts of Pixar’s OpenSubdiv
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

use super::buffer_descriptor::BufferDescriptor;
use super::cpu_vertex_buffer::CpuVertexBuffer;
use crate::far::StencilTable;

use opensubdiv_petite_sys as sys;

use crate::Error;
type Result<T, E = Error> = std::result::Result<T, E>;

/// Generic static eval stencils function.
///
/// This function has a same signature as other device kernels have so that it
/// can be called in the same way from OsdMesh template interface.
///
/// * `src_buffer` – Input primvar buffer.
/// * `src_desc` – Vertex buffer descriptor for the input buffer.
/// * `dst_buffer` –  Output primvar buffer.
/// * `dst_desc` – Vertex buffer descriptor for the output buffer.
/// * `stencil_table` – A [`StencilTable`].
pub fn evaluate_stencils(
    src_buffer: &CpuVertexBuffer,
    src_desc: BufferDescriptor,
    dst_buffer: &mut CpuVertexBuffer,
    dst_desc: BufferDescriptor,
    stencil_table: &StencilTable,
) -> Result<()> {
    unsafe {
        if sys::osd::CpuEvaluator_EvalStencils(
            src_buffer.0,
            src_desc.0,
            dst_buffer.0,
            dst_desc.0,
            stencil_table.0,
        ) {
            Ok(())
        } else {
            Err(Error::EvalStencilsFailed)
        }
    }
}