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#[macro_export]
macro_rules! gfx_impl_struct {
($runtime_format:ty : $compile_format:path = $root:ident {
$( $field:ident: $ty:ty = $name:expr, )*
}) => {
#[derive(Clone, Copy, Debug)]
pub struct $root {
$( pub $field: $ty, )*
}
impl $crate::pso::buffer::Structure<$runtime_format> for $root {
fn query(name: &str) -> Option<$crate::pso::buffer::Element<$runtime_format>> {
use std::mem::size_of;
use $crate::pso::buffer::{Element, ElemOffset, ElemStride};
let stride = size_of::<$root>() as ElemStride;
let tmp: &$root = unsafe{ ::std::mem::uninitialized() };
let base = tmp as *const _ as usize;
match name {
$(
$name => Some(Element {
format: <$ty as $compile_format>::get_format(),
offset: ((&tmp.$field as *const _ as usize) - base) as ElemOffset,
stride: stride,
}),
)*
_ => None,
}
}
}
}
}
#[macro_export]
macro_rules! gfx_vertex_struct {
($root:ident {
$( $field:ident: $ty:ty = $name:expr, )*
}) => (gfx_impl_struct!{
$crate::format::Format : $crate::format::Formatted =
$root {
$( $field: $ty = $name, )*
}
})
}
#[macro_export]
macro_rules! gfx_constant_struct {
($root:ident {
$( $field:ident: $ty:ty = $name:expr, )*
}) => (gfx_impl_struct!{
$crate::shade::ConstFormat : $crate::shade::Formatted =
$root {
$( $field: $ty = $name, )*
}
})
}