2019-11-02 12:21:56 +00:00
|
|
|
#include "gl_stream_buffer.h"
|
|
|
|
|
|
|
|
namespace GL {
|
|
|
|
|
|
|
|
StreamBuffer::StreamBuffer(GLenum target, GLuint buffer_id, u32 size)
|
|
|
|
: m_target(target), m_buffer_id(buffer_id), m_size(size), m_cpu_buffer(size)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
StreamBuffer::~StreamBuffer()
|
|
|
|
{
|
|
|
|
glDeleteBuffers(1, &m_buffer_id);
|
|
|
|
}
|
|
|
|
|
|
|
|
void StreamBuffer::Bind()
|
|
|
|
{
|
|
|
|
glBindBuffer(m_target, m_buffer_id);
|
|
|
|
}
|
|
|
|
|
2019-11-02 13:42:44 +00:00
|
|
|
void StreamBuffer::Unbind()
|
|
|
|
{
|
|
|
|
glBindBuffer(m_target, 0);
|
|
|
|
}
|
|
|
|
|
2019-11-02 12:21:56 +00:00
|
|
|
StreamBuffer::MappingResult StreamBuffer::Map(u32 alignment, u32 min_size)
|
|
|
|
{
|
|
|
|
return MappingResult{static_cast<void*>(m_cpu_buffer.data()), 0, m_size / alignment};
|
|
|
|
}
|
|
|
|
|
|
|
|
void StreamBuffer::Unmap(u32 used_size)
|
|
|
|
{
|
|
|
|
if (used_size == 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
glBindBuffer(m_target, m_buffer_id);
|
|
|
|
glBufferSubData(m_target, 0, used_size, m_cpu_buffer.data());
|
|
|
|
}
|
|
|
|
|
|
|
|
std::unique_ptr<StreamBuffer> StreamBuffer::Create(GLenum target, u32 size)
|
|
|
|
{
|
|
|
|
glGetError();
|
|
|
|
|
|
|
|
GLuint buffer_id;
|
|
|
|
glGenBuffers(1, &buffer_id);
|
|
|
|
glBindBuffer(target, buffer_id);
|
|
|
|
glBufferData(target, size, nullptr, GL_STREAM_DRAW);
|
|
|
|
|
|
|
|
GLenum err = glGetError();
|
|
|
|
if (err != GL_NO_ERROR)
|
|
|
|
{
|
|
|
|
glDeleteBuffers(1, &buffer_id);
|
|
|
|
return {};
|
|
|
|
}
|
|
|
|
|
|
|
|
return std::unique_ptr<StreamBuffer>(new StreamBuffer(target, buffer_id, size));
|
|
|
|
}
|
|
|
|
|
|
|
|
} // namespace GL
|