From 661a2bdaf7827cac9c863ab1eb4c69edafd244da Mon Sep 17 00:00:00 2001
From: Nimetu <nimetu@gmail.com>
Date: Mon, 4 Jan 2021 20:34:56 +0200
Subject: [PATCH] Added small program to measure font atlas performance,
 ryzom/ryzomcore#626

---
 nel/samples/3d/CMakeLists.txt           |   1 +
 nel/samples/3d/font/main.cpp            |  32 +++++++-
 nel/samples/3d/font_perf/CMakeLists.txt |  14 ++++
 nel/samples/3d/font_perf/beteckna.ttf   | Bin 0 -> 16488 bytes
 nel/samples/3d/font_perf/main.cpp       |  99 ++++++++++++++++++++++++
 5 files changed, 145 insertions(+), 1 deletion(-)
 create mode 100644 nel/samples/3d/font_perf/CMakeLists.txt
 create mode 100644 nel/samples/3d/font_perf/beteckna.ttf
 create mode 100644 nel/samples/3d/font_perf/main.cpp

diff --git a/nel/samples/3d/CMakeLists.txt b/nel/samples/3d/CMakeLists.txt
index 772ab0056..1062579cd 100644
--- a/nel/samples/3d/CMakeLists.txt
+++ b/nel/samples/3d/CMakeLists.txt
@@ -1,4 +1,5 @@
 ADD_SUBDIRECTORY(font)
+ADD_SUBDIRECTORY(font_perf)
 ADD_SUBDIRECTORY(cluster_viewer)
 ADD_SUBDIRECTORY(shape_viewer)
 
diff --git a/nel/samples/3d/font/main.cpp b/nel/samples/3d/font/main.cpp
index 5a656be49..1d5eaa114 100644
--- a/nel/samples/3d/font/main.cpp
+++ b/nel/samples/3d/font/main.cpp
@@ -22,6 +22,7 @@
 #include "nel/misc/event_emitter.h"
 #include "nel/misc/event_listener.h"
 #include "nel/misc/path.h"
+#include "nel/misc/random.h"
 
 // look at 3dinit example
 #include "nel/3d/nelu.h"
@@ -97,10 +98,12 @@ int main(int argc, char **argv)
 	CNELU::EventServer.addEmitter(CNELU::Driver->getEventEmitter());
 	CNELU::AsyncListener.addToServer(CNELU::EventServer);
 
+	NLMISC::CValueSmoother smoothFPS;
+	NLMISC::CRandom rnd;
 	do
 	{
 		// look at 3dinit example
-		CNELU::clearBuffers(CRGBA(0,0,0));
+		CNELU::clearBuffers(CRGBA(120,120,0));
 
 		// now, every frame, we have to render the computer string.
 
@@ -168,12 +171,39 @@ int main(int argc, char **argv)
 		tc.setHotSpot (CComputedString::BottomRight);
 		tc.printAt (0.99f, 0.01f, string("Press <ESC> to quit"));
 
+		/*for(uint i = 0; i < 1000; ++i)
+		{
+			uint fontSize = rnd.rand(40) + 10;
+			tc.setColor(CRGBA(rnd.rand(255), rnd.rand(255), rnd.rand(255)));
+			tc.setFontSize(fontSize);
+			tc.setHotSpot(CComputedString::MiddleMiddle);
+			tc.printAt(rnd.frand(1.f), rnd.frand(1.f), toString("%d", fontSize));
+		}*/
+
+		{
+			static TTicks oldTick = CTime::getPerformanceTime();
+			TTicks newTick = CTime::getPerformanceTime();
+			double deltaTime = CTime::ticksToSecond (newTick-oldTick);
+			oldTick = newTick;
+			smoothFPS.addValue((float)deltaTime);
+			deltaTime = smoothFPS.getSmoothValue ();
+			if (deltaTime > 0.0)
+			{
+				//printf("FPS: %.5f\n", 1.f/deltaTime);
+				tc.setFontSize(16);
+				tc.setColor(CRGBA::Yellow);
+				tc.setHotSpot(CComputedString::TopLeft);
+				tc.printAt(0.01f, 0.99f, toString("FPS:%.f", 1.0f/deltaTime));
+			}
+		}
+
 		// look 3dinit example
 		CNELU::swapBuffers();
 		CNELU::screenshot();
 
 		// look at event example
 		CNELU::EventServer.pump(true);
+
 	}
 	while(!CNELU::AsyncListener.isKeyPushed(KeyESCAPE));
 
diff --git a/nel/samples/3d/font_perf/CMakeLists.txt b/nel/samples/3d/font_perf/CMakeLists.txt
new file mode 100644
index 000000000..2f794c983
--- /dev/null
+++ b/nel/samples/3d/font_perf/CMakeLists.txt
@@ -0,0 +1,14 @@
+FILE(GLOB SRC *.cpp)
+
+ADD_EXECUTABLE(nl_sample_font_perf ${SRC})
+
+ADD_DEFINITIONS(-DFONT_DIR="\\"${NL_SHARE_ABSOLUTE_PREFIX}/nl_sample_font_perf/\\"")
+
+TARGET_LINK_LIBRARIES(nl_sample_font_perf nelmisc nel3d)
+NL_DEFAULT_PROPS(nl_sample_font_perf "NeL, Samples, 3D: Font Performance Test")
+NL_ADD_RUNTIME_FLAGS(nl_sample_font_perf)
+
+INSTALL(TARGETS nl_sample_font_perf RUNTIME DESTINATION ${NL_BIN_PREFIX} COMPONENT samples3d)
+INSTALL(FILES beteckna.ttf DESTINATION ${NL_SHARE_PREFIX}/nl_sample_font_perf COMPONENT samples3d)
+
+
diff --git a/nel/samples/3d/font_perf/beteckna.ttf b/nel/samples/3d/font_perf/beteckna.ttf
new file mode 100644
index 0000000000000000000000000000000000000000..e9a117f4d4906362913e2eebe10d06c0119ce957
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diff --git a/nel/samples/3d/font_perf/main.cpp b/nel/samples/3d/font_perf/main.cpp
new file mode 100644
index 000000000..d183d3fa8
--- /dev/null
+++ b/nel/samples/3d/font_perf/main.cpp
@@ -0,0 +1,99 @@
+// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
+// Copyright (C) 2020  Winch Gate Property Limited
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "nel/misc/types_nl.h"
+
+#include "nel/misc/event_emitter.h"
+#include "nel/misc/event_listener.h"
+#include "nel/misc/path.h"
+#include "nel/misc/random.h"
+
+// look at 3dinit example
+#include "nel/3d/nelu.h"
+
+// used for font management
+#include "nel/3d/font_manager.h"
+#include "nel/3d/computed_string.h"
+#include "nel/3d/text_context.h"
+#include "nel/3d/driver_user.h"
+
+#ifdef NL_OS_WINDOWS
+	#ifndef NL_COMP_MINGW
+		#define NOMINMAX
+	#endif
+	#include <windows.h>
+#endif // NL_OS_WINDOWS
+
+#ifndef FONT_DIR
+#	define FONT_DIR "."
+#endif
+
+using namespace std;
+using namespace NL3D;
+using namespace NLMISC;
+
+int main(int argc, char **argv)
+{
+	// look at 3dinit example
+	CNELU::init (800, 600, CViewport(), 32, true, 0, false, false);
+
+	NLMISC::CPath::addSearchPath(FONT_DIR);
+
+	// create a font manager
+	CFontManager fontManager;
+
+	// set the font cache to 2 megabytes (default is 1mb)
+	fontManager.setMaxMemory(2000000);
+
+	CTextContext tc;
+
+	tc.init (CNELU::Driver, &fontManager);
+
+	// The first param is the font name (could be ttf, pfb, fon, etc...). The
+	// second one is optional, it's the font kerning file
+	tc.setFontGenerator (NLMISC::CPath::lookup("beteckna.ttf"));
+
+	NLMISC::CRandom rnd;
+
+	uint nbCount = 100000;
+	TTicks startTick = CTime::getPerformanceTime();
+	std::string txt;
+	for(uint i = 0; i < nbCount; ++i)
+	{
+		uint fontSize = rnd.rand(200);
+		bool embolden = rnd.rand(1) == 1;
+		bool oblique = rnd.rand(1) == 1;
+		txt = toString("Lorem ipsum %03d", fontSize);
+
+		CComputedString cs;
+		fontManager.computeString(txt, tc.getFontGenerator(), CRGBA::White, fontSize, embolden, oblique, CNELU::Driver, cs);
+	}
+
+	TTicks endTick = CTime::getPerformanceTime();
+
+	double deltaTime = CTime::ticksToSecond(endTick-startTick);
+	std::string msg = toString("Generated %d strings in %.2fs\n", nbCount, deltaTime);
+
+	nlinfo("%s", msg.c_str());
+	printf("%s", msg.c_str());
+
+	fontManager.dumpCache ("font_pref_cache_dump.tga");
+
+	// look at 3dinit example
+	CNELU::release();
+
+	return EXIT_SUCCESS;
+}