From 0ea8c2f03ffacecb1b02aad4416ae52eb69aa5a1 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sun, 23 Feb 2020 15:28:41 +0100
Subject: Add UI benchmark test.

---
 test/uitests/Makefile.am      |  12 ++++-
 test/uitests/benchmarktest.cc | 108 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 119 insertions(+), 1 deletion(-)
 create mode 100644 test/uitests/benchmarktest.cc

diff --git a/test/uitests/Makefile.am b/test/uitests/Makefile.am
index 14cbf4e..e85190f 100644
--- a/test/uitests/Makefile.am
+++ b/test/uitests/Makefile.am
@@ -1,5 +1,5 @@
 noinst_PROGRAMS = resizetest tabwidgettest framewidgettest \
-	filebrowsertest
+	filebrowsertest benchmarktest
 
 resizetest_LDADD = $(top_srcdir)/plugingui/libdggui.la $(top_srcdir)/src/libdg.la
 resizetest_CXXFLAGS = \
@@ -36,3 +36,13 @@ framewidgettest_CXXFLAGS = \
 framewidgettest_SOURCES = \
 	framewidgettest.cc \
 	$(top_srcdir)/hugin/hugin.c
+
+benchmarktest_LDADD = \
+	$(top_srcdir)/plugingui/libdggui.la $(top_srcdir)/src/libdg.la
+benchmarktest_CXXFLAGS = \
+	-I$(top_srcdir)/plugingui \
+	-I$(top_srcdir)/src \
+	-I$(top_srcdir)/hugin
+benchmarktest_SOURCES = \
+	benchmarktest.cc \
+	$(top_srcdir)/hugin/hugin.c
diff --git a/test/uitests/benchmarktest.cc b/test/uitests/benchmarktest.cc
new file mode 100644
index 0000000..c304877
--- /dev/null
+++ b/test/uitests/benchmarktest.cc
@@ -0,0 +1,108 @@
+/* -*- Mode: c++ -*- */
+/***************************************************************************
+ *            benchmarktest.cc
+ *
+ *  Sun Feb 23 14:24:12 CET 2020
+ *  Copyright 2020 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include <chrono>
+#include <iostream>
+#include <cstdint>
+#include <string>
+
+#include <image.h>
+#include <painter.h>
+#include <canvas.h>
+
+class TimedCanvas
+	: public GUI::Canvas
+{
+public:
+	GUI::PixelBufferAlpha& GetPixelBuffer() override
+	{
+		return pixbuf;
+	}
+
+private:
+	GUI::PixelBufferAlpha pixbuf{800, 600};
+};
+
+class TimedScope
+{
+public:
+	using clock_t = std::chrono::steady_clock;
+
+	TimedScope(const std::string& title, std::size_t iterations)
+		: title(title)
+		, iterations(iterations)
+		, begin(clock_t::now())
+	{}
+
+	~TimedScope()
+	{
+		clock_t::time_point end= std::chrono::steady_clock::now();
+
+		auto micro_seconds =
+			std::chrono::duration_cast<std::chrono::microseconds>(end - begin).count();
+		micro_seconds /= iterations;
+		std::cout << title << ": " << micro_seconds << " µs " <<
+			"(" << (micro_seconds / 1000) << " ms)" << std::endl;
+	}
+
+private:
+	std::string title;
+	std::size_t iterations;
+	clock_t::time_point begin;
+};
+
+int main()
+{
+	TimedCanvas canvas;
+	GUI::Painter painter(canvas);
+	GUI::Image image(":resources/bg.png");
+
+	{
+		TimedScope timed("No scale", 10000);
+		for(int i = 0; i < 10000; ++i)
+		{
+			painter.drawImage(0, 0, image);
+		}
+	}
+
+	{
+		TimedScope timed("Scaled 1:1", 2000);
+		for(int i = 0; i < 2000; ++i)
+		{
+			painter.drawImageStretched(0, 0, image, 370, 330);
+		}
+	}
+
+	{
+		TimedScope timed("Scaled to window", 1000);
+		for(int i = 0; i < 1000; ++i)
+		{
+			painter.drawImageStretched(0, 0, image, 800, 6000);
+		}
+	}
+
+	return 0;
+}
-- 
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