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Support retrieving available GPU memory size

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This commit is contained in:
Nikita Lisitsa 2022-08-14 22:59:14 +03:00
parent 19d8637f7a
commit 5f3b07573e
2 changed files with 40 additions and 0 deletions
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11
libs/gfx/include/psemek/gfx/memory.hpp Normal file
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#pragma once
#include <cstddef>
#include <optional>
namespace psemek::gfx
{
std::optional<std::size_t> available_memory();
}

29
libs/gfx/source/memory.cpp Normal file
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#include <psemek/gfx/memory.hpp>
#include <psemek/gfx/gl.hpp>
namespace psemek::gfx
{
std::optional<std::size_t> available_memory()
{
static bool const nvx = gl::sys::has_extension("GL_NVX_gpu_memory_info");
static bool const ati = gl::sys::has_extension("GL_ATI_meminfo");
if (nvx)
{
GLint value = 0;
gl::GetIntegerv(0x9049, &value);
return static_cast<std::size_t>(value) * 1024;
}
if (ati)
{
GLint values[4]{};
gl::GetIntegerv(0x87FC, values);
return static_cast<std::size_t>(values[0]) * 1024;
}
return std::nullopt;
}
}