lisyarus/psemek
1
0
Fork 1
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Support explicit padding in mesh vertices

Browse source
This commit is contained in:
Nikita Lisitsa 2020-09-10 11:06:06 +03:00
parent 30448d2ec1
commit 6e42502873
1 changed files with 24 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
libs/gfx/include/psemek/gfx/mesh.hpp
View file

@ -19,9 +19,17 @@ namespace psemek::gfx
struct normalized struct normalized
{}; {};
// skips a single attribute index
struct skip struct skip
{}; {};
// skips bytes in the vertex
template <std::size_t N>
struct padding
{
static constexpr std::size_t size = N;
};
template <typename Attrib> template <typename Attrib>
struct attrib_traits; struct attrib_traits;
@ -148,6 +156,14 @@ namespace psemek::gfx
namespace detail namespace detail
{ {
template <typename T>
struct is_padding : std::false_type
{};
template <std::size_t N>
struct is_padding<padding<N>> : std::true_type
{};
template <typename Attr> template <typename Attr>
std::size_t attr_size() std::size_t attr_size()
{ {
@ -155,6 +171,10 @@ namespace psemek::gfx
{ {
return 0; return 0;
} }
else if constexpr (is_padding<Attr>::value)
{
return Attr::size;
}
else else
{ {
return sizeof(typename attrib_traits<Attr>::attrib_type); return sizeof(typename attrib_traits<Attr>::attrib_type);
@ -192,6 +212,10 @@ namespace psemek::gfx
{ {
mesh_setup<Attribs...>::setup_impl(index + 1, offset, stride); mesh_setup<Attribs...>::setup_impl(index + 1, offset, stride);
} }
else if constexpr (is_padding<Attr1>::value)
{
mesh_setup<Attribs...>::setup_impl(index, offset + Attr1::size, stride);
}
else else
{ {
using traits = attrib_traits<Attr1>; using traits = attrib_traits<Attr1>;