1 files changed, 162 insertions, 0 deletions
diff --git a/Runtime/GfxDevice/opengl/TimerQueryGL.cpp b/Runtime/GfxDevice/opengl/TimerQueryGL.cpp
new file mode 100644
index 0000000..8f218d8
--- /dev/null
+++ b/Runtime/GfxDevice/opengl/TimerQueryGL.cpp
@@ -0,0 +1,162 @@
+#include "UnityPrefix.h"
+#if ENABLE_PROFILER
+#include "UnityGL.h"
+#include "TimerQueryGL.h"
+#include "Runtime/Shaders/GraphicsCaps.h"
+
+TimerQueryGL::TimerQueryGL()
+{
+	m_Query = g_TimerQueriesGL.AllocateQuery();
+}
+
+TimerQueryGL::~TimerQueryGL()
+{
+	g_TimerQueriesGL.ReleaseQuery(m_Query);
+}
+
+void TimerQueryGL::Measure()
+{
+	// Finish previous timer query
+	OGL_CALL(glEndQueryARB(GL_TIME_ELAPSED_EXT));
+
+	MeasureBegin();
+}
+
+void TimerQueryGL::MeasureBegin()
+{
+	// Flush previous result
+	GetElapsed(kWaitRenderThread);
+
+	OGL_CALL(glBeginQueryARB(GL_TIME_ELAPSED_EXT, m_Query));
+
+	g_TimerQueriesGL.AddActiveTimerQuery(this);
+	m_Time = kInvalidProfileTime;
+}
+
+ProfileTimeFormat TimerQueryGL::GetElapsed(UInt32 flags)
+{
+	bool wait = (flags & kWaitRenderThread) != 0;
+	// We need to return a valid time if waiting
+	if (wait && m_Time == kInvalidProfileTime)
+		m_Time = 0;
+	while (IsInList())
+	{
+		if (!g_TimerQueriesGL.PollNextTimerQuery(wait))
+			break;
+	}
+	return m_Time;
+}
+
+bool TimerQueryGL::PollResult(UInt64& prevTime, bool wait)
+{
+	for (;;)
+	{
+		// Currently we always wait on result
+		//GLint available = 0;
+		//OGL_CALL(glGetQueryObjectivARB(m_Query, GL_QUERY_RESULT_AVAILABLE, &available));
+		//if  (available)
+		{
+			GLuint64EXT time;
+			OGL_CALL(glGetQueryObjectui64vEXT(m_Query, GL_QUERY_RESULT, &time));
+			// Some Nvidia cards return invalid results, sanity check!
+			if (time > GLuint64EXT(0xffffffff))
+				gGraphicsCaps.buggyTimerQuery = true;
+			// We actually want previous query's time elapsed
+			// Save current returned result for next query
+			m_Time = prevTime;
+			prevTime = time;
+			return true;
+		}
+		if (!wait)
+			break;
+	}
+	return false;
+}
+
+TimerQueriesGL::TimerQueriesGL()
+{
+	memset(m_FreeQueries, 0, sizeof(m_FreeQueries));
+	m_NumFreeQueries = 0;
+	m_LastQueryTime = 0;
+	memset(m_StartTimeQueries, 0, sizeof(m_StartTimeQueries));
+	m_StartTimeQueryIndex = 0;
+	m_Active = false;
+}
+
+GLuint TimerQueriesGL::AllocateQuery()
+{
+	if (m_NumFreeQueries == 0)
+	{
+		OGL_CALL(glGenQueriesARB(kMaxFreeQueries, m_FreeQueries));
+		m_NumFreeQueries = kMaxFreeQueries;
+	}
+	return m_FreeQueries[--m_NumFreeQueries];
+}
+
+void TimerQueriesGL::ReleaseQuery(GLuint query)
+{
+	if (m_NumFreeQueries == kMaxFreeQueries)
+	{
+		OGL_CALL(glDeleteQueriesARB(kMaxFreeQueries, m_FreeQueries));
+		m_NumFreeQueries = 0;
+	}
+	m_FreeQueries[m_NumFreeQueries++] = query;
+}
+
+void TimerQueriesGL::AddActiveTimerQuery(TimerQueryGL* query)
+{
+	m_ActiveTimerQueries.push_back(*query);
+}
+
+void TimerQueriesGL::BeginTimerQueries()
+{
+	Assert(!m_Active);
+	int& index = m_StartTimeQueryIndex;
+	if(m_StartTimeQueries[index] == NULL)
+	{
+		m_StartTimeQueries[index] = new TimerQueryGL;
+	}
+	m_StartTimeQueries[index]->MeasureBegin();
+	index = (index + 1) % kStartTimeQueryCount;
+	m_Active = true;
+}
+
+void TimerQueriesGL::EndTimerQueries()
+{
+	Assert(m_Active);
+	OGL_CALL(glEndQueryARB(GL_TIME_ELAPSED_EXT));
+	OGL_CALL(glFlush());
+
+	// Move queries from active to polled list
+	m_PolledTimerQueries.append(m_ActiveTimerQueries);
+
+	g_TimerQueriesGL.PollTimerQueries(true);
+	m_Active = false;
+}
+
+void TimerQueriesGL::PollTimerQueries(bool wait)
+{
+	for (;;)
+	{
+		if (!PollNextTimerQuery(wait))
+			break;
+	}
+}
+
+bool TimerQueriesGL::PollNextTimerQuery(bool wait)
+{
+	if (m_PolledTimerQueries.empty())
+		return false;
+
+	TimerQueryGL& query = m_PolledTimerQueries.front();
+	if (query.PollResult(m_LastQueryTime, wait))
+	{
+		m_PolledTimerQueries.pop_front();
+		return true;
+	}
+	return false;
+}
+
+TimerQueriesGL g_TimerQueriesGL;
+
+#endif