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Optimize program uniform location cache

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This commit is contained in:
Nikita Lisitsa 2021-07-13 11:53:58 +03:00
parent 1cc5d28761
commit d73ce27c32
2 changed files with 10 additions and 8 deletions
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9
libs/gfx/include/psemek/gfx/program.hpp
View file

@ -8,7 +8,8 @@
#include <psemek/geom/interval.hpp>
#include <psemek/geom/quaternion.hpp>
#include <unordered_map>
#include <boost/container/flat_map.hpp>
#include <string_view>
namespace psemek::gfx
@ -36,7 +37,7 @@ namespace psemek::gfx
void reset();
GLint location(char const * name) const;
GLint location(std::string_view name) const;
struct uniform_proxy
{
@ -110,11 +111,11 @@ namespace psemek::gfx
GLint location_;
};
uniform_proxy operator[] (char const * name) const;
uniform_proxy operator[] (std::string_view name) const;
private:
GLuint program_;
mutable std::unordered_map<std::string, GLint> uniforms_;
mutable boost::container::flat_map<std::string, GLint, std::less<>> uniforms_;
program(std::nullptr_t)
: program_{0}

9
libs/gfx/source/program.cpp
View file

@ -364,19 +364,20 @@ namespace psemek::gfx
program_ = 0;
}
GLint program::location(char const * name) const
GLint program::location(std::string_view name) const
{
auto it = uniforms_.find(name);
if (it == uniforms_.end())
{
auto l = gl::GetUniformLocation(program_, name);
uniforms_[name] = l;
std::string name_str(name.begin(), name.end());
auto l = gl::GetUniformLocation(program_, name_str.c_str());
uniforms_[std::move(name_str)] = l;
return l;
}
return it->second;
}
program::uniform_proxy program::operator[] (char const * name) const
program::uniform_proxy program::operator[] (std::string_view name) const
{
return {location(name)};
}