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#include "glAllocator.h"
namespace Detail {
std::pair<void *, GLuint>
allocateBuffer(size_t count, size_t objSize)
{
constexpr static GLbitfield MAPPING_FLAGS
= GL_MAP_WRITE_BIT | GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT;
constexpr static GLbitfield STORAGE_FLAGS = GL_DYNAMIC_STORAGE_BIT | MAPPING_FLAGS;
GLuint name = 0;
glCreateBuffers(1, &name);
const auto size = static_cast<GLsizeiptr>(count * objSize);
glNamedBufferStorage(name, size, nullptr, STORAGE_FLAGS);
const auto data = (glMapNamedBufferRange(name, 0, size, MAPPING_FLAGS));
if (!data) {
glDeleteBuffers(1, &name);
throw std::bad_alloc();
}
return {data, name};
}
void
deallocateBuffer(GLuint name)
{
glUnmapNamedBuffer(name);
glDeleteBuffers(1, &name);
}
}
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