1 files changed, 133 insertions, 0 deletions
diff --git a/Source/Plugins/Plugin_VideoOGL/Src/PerfQuery.cpp b/Source/Plugins/Plugin_VideoOGL/Src/PerfQuery.cpp
new file mode 100644
index 0000000000..db47217655
--- /dev/null
+++ b/Source/Plugins/Plugin_VideoOGL/Src/PerfQuery.cpp
@@ -0,0 +1,133 @@
+#include "RenderBase.h"
+#include "GLUtil.h"
+#include "PerfQuery.h"
+
+namespace OGL
+{
+
+PerfQuery::PerfQuery()
+	: m_query_read_pos()
+	, m_query_count()
+{
+	for (u32 i = 0; i != ARRAYSIZE(m_query_buffer); ++i)
+		glGenQueries(1, &m_query_buffer[i].query_id);
+	
+	ResetQuery();
+}
+
+PerfQuery::~PerfQuery()
+{
+	for (u32 i = 0; i != ARRAYSIZE(m_query_buffer); ++i)
+		glDeleteQueries(1, &m_query_buffer[i].query_id);
+}
+
+void PerfQuery::EnableQuery(PerfQueryGroup type)
+{
+	// Is this sane?
+	if (m_query_count > ARRAYSIZE(m_query_buffer) / 2)
+		WeakFlush();
+	
+	if (ARRAYSIZE(m_query_buffer) == m_query_count)
+	{
+		FlushOne();
+		//ERROR_LOG(VIDEO, "flushed query buffer early!");
+	}
+	
+	// start query
+	if (type == PQG_ZCOMP_ZCOMPLOC || type == PQG_ZCOMP)
+	{
+		auto& entry = m_query_buffer[(m_query_read_pos + m_query_count) % ARRAYSIZE(m_query_buffer)];
+		
+		glBeginQuery(GL_SAMPLES_PASSED, entry.query_id);
+		entry.query_type = type;
+		
+		++m_query_count;
+	}
+}
+
+void PerfQuery::DisableQuery(PerfQueryGroup type)
+{
+	// stop query
+	if (type == PQG_ZCOMP_ZCOMPLOC || type == PQG_ZCOMP)
+	{
+		glEndQuery(GL_SAMPLES_PASSED);
+	}
+}
+
+bool PerfQuery::IsFlushed() const
+{
+	return 0 == m_query_count;
+}
+
+void PerfQuery::FlushOne()
+{
+	auto& entry = m_query_buffer[m_query_read_pos];
+
+	GLuint result = 0;
+	glGetQueryObjectuiv(entry.query_id, GL_QUERY_RESULT, &result);
+
+	// NOTE: Reported pixel metrics should be referenced to native resolution
+	m_results[entry.query_type] += (u64)result * EFB_WIDTH / g_renderer->GetTargetWidth() * EFB_HEIGHT / g_renderer->GetTargetHeight();
+
+	m_query_read_pos = (m_query_read_pos + 1) % ARRAYSIZE(m_query_buffer);
+	--m_query_count;
+}
+
+// TODO: could selectively flush things, but I don't think that will do much
+void PerfQuery::FlushResults()
+{
+	while (!IsFlushed())
+		FlushOne();
+}
+
+void PerfQuery::WeakFlush()
+{
+	while (!IsFlushed())
+	{
+		auto& entry = m_query_buffer[m_query_read_pos];
+		
+		GLuint result = GL_FALSE;
+		glGetQueryObjectuiv(entry.query_id, GL_QUERY_RESULT_AVAILABLE, &result);
+		
+		if (GL_TRUE == result)
+		{
+			FlushOne();
+		}
+		else
+		{
+			break;
+		}
+	}
+}
+
+void PerfQuery::ResetQuery()
+{
+	m_query_count = 0;
+	std::fill_n(m_results, ARRAYSIZE(m_results), 0);
+}
+
+u32 PerfQuery::GetQueryResult(PerfQueryType type)
+{
+	u32 result = 0;
+	
+	if (type == PQ_ZCOMP_INPUT_ZCOMPLOC || type == PQ_ZCOMP_OUTPUT_ZCOMPLOC)
+	{
+		result = m_results[PQG_ZCOMP_ZCOMPLOC];
+	}
+	else if (type == PQ_ZCOMP_INPUT || type == PQ_ZCOMP_OUTPUT)
+	{
+		result = m_results[PQG_ZCOMP];
+	}
+	else if (type == PQ_BLEND_INPUT)
+	{
+		result = m_results[PQG_ZCOMP] + m_results[PQG_ZCOMP_ZCOMPLOC];
+	}
+	else if (type == PQ_EFB_COPY_CLOCKS)
+	{
+		result = m_results[PQG_EFB_COPY_CLOCKS];
+	}
+	
+	return result / 4;
+}
+
+} // namespace