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Support merging attrib descriptions

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This commit is contained in:
Nikita Lisitsa 2020-10-23 17:12:21 +03:00
parent e5c869f27b
commit ec36942f7d
2 changed files with 26 additions and 9 deletions
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27
libs/gfx/include/psemek/gfx/attribs.hpp
View file

@ -24,7 +24,22 @@ namespace psemek::gfx
GLuint divisor;
};
using attribs_description = std::vector<attrib_description>;
struct attribs_description
{
std::vector<attrib_description> attribs;
GLuint index_count;
};
inline attribs_description operator + (attribs_description d1, attribs_description const & d2)
{
for (auto a : d2.attribs)
{
a.index += d1.index_count;
d1.attribs.push_back(a);
}
d1.index_count += d2.index_count;
return d1;
}
template <typename T>
struct normalized
@ -283,8 +298,10 @@ namespace psemek::gfx
static void make(attribs_description &)
{}
static void make_impl(attribs_description &, std::size_t, std::size_t, std::size_t)
{ }
static void make_impl(attribs_description & result, std::size_t index, std::size_t, std::size_t)
{
result.index_count = index;
}
};
template <bool Instance, typename Attr1, typename ... Attribs>
@ -326,7 +343,7 @@ namespace psemek::gfx
attr.pointer = reinterpret_cast<char const *>(offset + row * attr::columns * sizeof(T));
attr.divisor = Instance ? 1 : 0;
result.push_back(attr);
result.attribs.push_back(attr);
}
make_attribs_description_impl<Instance, Attribs...>::make_impl(result, index + attr::rows, offset + attr_size<Attr1>(), stride);
@ -345,7 +362,7 @@ namespace psemek::gfx
attr.pointer = reinterpret_cast<char const *>(offset);
attr.divisor = Instance ? 1 : 0;
result.push_back(attr);
result.attribs.push_back(attr);
make_attribs_description_impl<Instance, Attribs...>::make_impl(result, index + 1, offset + attr_size<Attr1>(), stride);
}

8
libs/gfx/source/mesh.cpp
View file

@ -31,7 +31,7 @@ namespace psemek::gfx
void mesh::setup(attribs_description const & attribs)
{
assert(!attribs.empty());
assert(!attribs.attribs.empty());
array_.bind();
@ -43,7 +43,7 @@ namespace psemek::gfx
std::size_t stride = 0;
std::size_t instance_stride = 0;
for (auto const & a : attribs)
for (auto const & a : attribs.attribs)
{
max_index = std::max<std::size_t>(max_index, a.index);
@ -67,7 +67,7 @@ namespace psemek::gfx
if (!vertex_buffer_) vertex_buffer_ = buffer{};
vertex_buffer_.bind();
for (auto const & a : attribs)
for (auto const & a : attribs.attribs)
{
if (a.divisor != 0) continue;
@ -80,7 +80,7 @@ namespace psemek::gfx
if (!instance_buffer_) instance_buffer_ = buffer{};
instance_buffer_.bind();
for (auto const & a : attribs)
for (auto const & a : attribs.attribs)
{
if (a.divisor == 0) continue;