Merge branch 'perfqueries'.

Adds support for PE performance metrics.
Used in Super Mario Sunshine's "Scrubbing Sirena Beach" level to determine when enough goop has been cleaned up to finish the level.
Also used in TimeSplitters: Future Perfect to determine the appearance of flares around light sources (e.g. sun).

OpenGL and D3D11 only. D3D9 support unlikely to be added unless anyone bothers to do the work.
Initial work and D3D11 support by me. Kudos go to Billiard for adding the OpenGL support and reviving development of this branch that way :D

Slightly (~7%) decreases performance when performance metrics are used (and only then).

Fixes issue 1498.
Fixes issue 5368.

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..95311eb98d
--- /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 (int i = 0; i != ARRAYSIZE(m_query_buffer); ++i)
+		glGenQueries(1, &m_query_buffer[i].query_id);
+	
+	ResetQuery();
+}
+
+PerfQuery::~PerfQuery()
+{
+	for (int 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