mirror of
https://github.com/MaSzyna-EU07/maszyna.git
synced 2026-10-17 22:39:19 +02:00
125 lines
2.7 KiB
C++
125 lines
2.7 KiB
C++
#include "stdafx.h"
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#include "query.h"
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#include "utilities/Globals.h"
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gl::query::query(targets target)
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: target(target)
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{
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glGenQueries(1, *this);
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}
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gl::query::~query()
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{
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end();
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glDeleteQueries(1, *this);
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}
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void gl::query::begin()
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{
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if (active_queries[target])
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active_queries[target]->end();
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glBeginQuery(glenum_target(target), *this);
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active_queries[target] = this;
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}
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void gl::query::end()
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{
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if (active_queries[target] != this)
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return;
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glEndQuery(glenum_target(target));
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active_queries[target] = nullptr;
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}
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std::optional<int64_t> gl::query::result()
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{
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end(); // intercept potential error if the result check is called for still active object
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GLuint ready;
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glGetQueryObjectuiv(*this, GL_QUERY_RESULT_AVAILABLE, &ready);
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int64_t value = 0;
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if (ready) {
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glGetQueryObjecti64v(*this, GL_QUERY_RESULT, &value);
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return std::optional<int64_t>(value);
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}
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return std::nullopt;
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}
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GLenum gl::query::glenum_target(targets Target) const
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{
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static std::array<GLenum, 6> const mapping =
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{
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GL_SAMPLES_PASSED,
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GL_ANY_SAMPLES_PASSED,
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GL_ANY_SAMPLES_PASSED_CONSERVATIVE,
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GL_PRIMITIVES_GENERATED,
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GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN,
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GL_TIME_ELAPSED
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};
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return mapping[Target];
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}
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thread_local gl::query* gl::query::active_queries[6];
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gl::gpu_timer::~gpu_timer()
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{
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if (m_queries[0] != 0)
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glDeleteQueries(static_cast<GLsizei>(m_queries.size()), m_queries.data());
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}
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void gl::gpu_timer::begin()
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{
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if (m_queries[0] == 0)
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glCreateQueries(GL_TIMESTAMP, static_cast<GLsizei>(m_queries.size()), m_queries.data());
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collect();
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m_active = !m_pending[m_slot];
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if (m_active)
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glQueryCounter(m_queries[m_slot * 2], GL_TIMESTAMP);
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}
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void gl::gpu_timer::end()
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{
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if (!m_active)
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return;
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glQueryCounter(m_queries[m_slot * 2 + 1], GL_TIMESTAMP);
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m_pending[m_slot] = true;
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m_slot = (m_slot + 1) % SLOTS;
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m_active = false;
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}
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std::optional<uint64_t> gl::gpu_timer::result()
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{
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if (m_queries[0] != 0)
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collect();
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return m_last;
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}
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void gl::gpu_timer::collect()
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{
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// slots finish in the order they were issued, oldest first
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for (size_t i = 0; i < SLOTS; ++i)
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{
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size_t const slot = (m_slot + i) % SLOTS;
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if (!m_pending[slot])
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continue;
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GLint startready = GL_FALSE;
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GLint endready = GL_FALSE;
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glGetQueryObjectiv(m_queries[slot * 2], GL_QUERY_RESULT_AVAILABLE, &startready);
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glGetQueryObjectiv(m_queries[slot * 2 + 1], GL_QUERY_RESULT_AVAILABLE, &endready);
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if (!startready || !endready)
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break;
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GLuint64 start = 0;
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GLuint64 end = 0;
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glGetQueryObjectui64v(m_queries[slot * 2], GL_QUERY_RESULT, &start);
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glGetQueryObjectui64v(m_queries[slot * 2 + 1], GL_QUERY_RESULT, &end);
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m_last = end >= start ? end - start : 0;
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m_pending[slot] = false;
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}
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}
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