OGL: Implement pixel metrics (untested)

Source/Plugins/Plugin_VideoOGL/Src/PerfQuery.cpp

@@ -0,0 +1,78 @@
+#include "GLUtil.h"
+#include "PerfQuery.h"
+
+namespace OGL {
+
+u32 results[PQG_NUM_MEMBERS] = { 0 };
+GLuint query_id;
+
+PerfQueryGroup active_query;
+
+PerfQuery::PerfQuery()
+{
+	glGenQueries(1, &query_id);
+}
+
+PerfQuery::~PerfQuery()
+{
+	glDeleteQueries(1, &query_id);
+}
+
+void PerfQuery::EnableQuery(PerfQueryGroup type)
+{
+	// start query
+	if (type == PQG_ZCOMP_ZCOMPLOC || type == PQG_ZCOMP)
+	{
+		glBeginQuery(GL_SAMPLES_PASSED, query_id);
+	}
+	active_query = type;
+}
+
+void PerfQuery::DisableQuery(PerfQueryGroup type)
+{
+	// stop query
+	if (type == PQG_ZCOMP_ZCOMPLOC || type == PQG_ZCOMP)
+	{
+		glEndQuery(GL_SAMPLES_PASSED);
+
+		GLuint query_result = GL_FALSE;
+		while (query_result != GL_TRUE)
+		{
+			glGetQueryObjectuiv(query_id, GL_QUERY_RESULT_AVAILABLE, &query_result);
+		}
+
+		glGetQueryObjectuiv(query_id, GL_QUERY_RESULT, &query_result);
+
+		results[active_query] += query_result;
+	}
+}
+
+void PerfQuery::ResetQuery()
+{
+	memset(results, 0, sizeof(results));
+}
+
+u32 PerfQuery::GetQueryResult(PerfQueryType type)
+{
+	if (type == PQ_ZCOMP_INPUT_ZCOMPLOC || type == PQ_ZCOMP_OUTPUT_ZCOMPLOC || type == PQ_BLEND_INPUT)
+	{
+
+	}
+	if (type == PQ_ZCOMP_INPUT || type == PQ_ZCOMP_OUTPUT || type == PQ_BLEND_INPUT)
+	{
+
+	}
+	if (type == PQ_BLEND_INPUT)
+	{
+		results[PQ_BLEND_INPUT] = results[PQ_ZCOMP_OUTPUT] + results[PQ_ZCOMP_OUTPUT_ZCOMPLOC];
+	}
+
+	if (type == PQ_EFB_COPY_CLOCKS)
+	{
+		// TODO
+	}
+
+	return results[type];
+}
+
+} // namespace