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Code Issues 151 Wiki Activity

Add SSBO and compute shader support to gl wrappers

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Hirek
2026-10-15 12:13:44 +02:00
parent 39d5df2ef3
commit 677a96c293
9 changed files with 203 additions and 0 deletions
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61
gl/query.cpp
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@@ -61,3 +61,64 @@ GLenum gl::query::glenum_target(targets Target) const
}
thread_local gl::query* gl::query::active_queries[6];
gl::gpu_timer::~gpu_timer()
{
if (m_queries[0] != 0)
glDeleteQueries(static_cast<GLsizei>(m_queries.size()), m_queries.data());
}
void gl::gpu_timer::begin()
{
if (m_queries[0] == 0)
glCreateQueries(GL_TIMESTAMP, static_cast<GLsizei>(m_queries.size()), m_queries.data());
collect();
m_active = !m_pending[m_slot];
if (m_active)
glQueryCounter(m_queries[m_slot * 2], GL_TIMESTAMP);
}
void gl::gpu_timer::end()
{
if (!m_active)
return;
glQueryCounter(m_queries[m_slot * 2 + 1], GL_TIMESTAMP);
m_pending[m_slot] = true;
m_slot = (m_slot + 1) % SLOTS;
m_active = false;
}
std::optional<uint64_t> gl::gpu_timer::result()
{
if (m_queries[0] != 0)
collect();
return m_last;
}
void gl::gpu_timer::collect()
{
// slots finish in the order they were issued, oldest first
for (size_t i = 0; i < SLOTS; ++i)
{
size_t const slot = (m_slot + i) % SLOTS;
if (!m_pending[slot])
continue;
GLint startready = GL_FALSE;
GLint endready = GL_FALSE;
glGetQueryObjectiv(m_queries[slot * 2], GL_QUERY_RESULT_AVAILABLE, &startready);
glGetQueryObjectiv(m_queries[slot * 2 + 1], GL_QUERY_RESULT_AVAILABLE, &endready);
if (!startready || !endready)
break;
GLuint64 start = 0;
GLuint64 end = 0;
glGetQueryObjectui64v(m_queries[slot * 2], GL_QUERY_RESULT, &start);
glGetQueryObjectui64v(m_queries[slot * 2 + 1], GL_QUERY_RESULT, &end);
m_last = end >= start ? end - start : 0;
m_pending[slot] = false;
}
}