From 85bf771ea6d8d584f1c735cc963e17571ca0a0d1 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Mon, 17 Apr 2023 11:54:07 +0100
Subject: First cut of instance vertices and proxy

Untested outside unit test, allows the use of a glBuffer as a storage container. To be combined
with a vertex array and/or mesh etc for massing drawing with glDrawElementsInstanced
---
 test/Jamfile.jam         |  1 +
 test/test-instancing.cpp | 76 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100644 test/test-instancing.cpp

(limited to 'test')

diff --git a/test/Jamfile.jam b/test/Jamfile.jam
index b0eed5e..9cdcef4 100644
--- a/test/Jamfile.jam
+++ b/test/Jamfile.jam
@@ -57,6 +57,7 @@ run test-assetFactory.cpp : -- : [ sequence.insertion-sort [ glob-tree $(res) :
 run perf-assetFactory.cpp : -- : test-assetFactory : <library>benchmark <library>test ;
 run perf-persistence.cpp : -- : test-persistence : <library>benchmark <library>test ;
 run test-worker.cpp ;
+run test-instancing.cpp : : : <library>test ;
 compile test-static-enumDetails.cpp ;
 compile test-static-stream_support.cpp ;
 explicit perf-assetFactory ;
diff --git a/test/test-instancing.cpp b/test/test-instancing.cpp
new file mode 100644
index 0000000..7191567
--- /dev/null
+++ b/test/test-instancing.cpp
@@ -0,0 +1,76 @@
+#define BOOST_TEST_MODULE instancing
+
+#include "testHelpers.h"
+#include "testMainWindow.h"
+#include "ui/applicationBase.h"
+#include <boost/test/data/test_case.hpp>
+#include <boost/test/unit_test.hpp>
+
+#include <gfx/gl/instanceVertices.h>
+
+BOOST_GLOBAL_FIXTURE(ApplicationBase);
+BOOST_GLOBAL_FIXTURE(TestMainWindow);
+
+BOOST_FIXTURE_TEST_SUITE(i, InstanceVertices<int>)
+
+BOOST_AUTO_TEST_CASE(createDestroy)
+{
+	BOOST_REQUIRE(data.data());
+	BOOST_CHECK_EQUAL(0, next);
+	BOOST_CHECK(unused.empty());
+}
+
+BOOST_AUTO_TEST_CASE(storeRetreive)
+{ // Read write raw buffer, not normally allowed
+	std::vector<int> test(data.size());
+	std::copy(test.begin(), test.end(), data.begin());
+	BOOST_CHECK_EQUAL_COLLECTIONS(test.begin(), test.end(), data.begin(), data.end());
+}
+
+BOOST_AUTO_TEST_CASE(acquireRelease)
+{
+	{
+		auto proxy = acquire();
+		*proxy = 20;
+		BOOST_CHECK_EQUAL(1, next);
+	}
+	BOOST_CHECK_EQUAL(1, next);
+	BOOST_CHECK_EQUAL(1, unused.size());
+	BOOST_CHECK_EQUAL(0, unused.front());
+}
+
+BOOST_AUTO_TEST_CASE(acquireReleaseMove)
+{
+	{
+		auto proxy1 = acquire();
+		*proxy1 = 20;
+		BOOST_CHECK_EQUAL(1, next);
+		auto proxy2 = std::move(proxy1);
+		*proxy2 = 40;
+		BOOST_CHECK_EQUAL(1, next);
+	}
+	BOOST_CHECK_EQUAL(1, next);
+	BOOST_CHECK_EQUAL(1, unused.size());
+	BOOST_CHECK_EQUAL(0, unused.front());
+}
+
+BOOST_AUTO_TEST_CASE(initialize)
+{
+	auto proxy = acquire(5);
+	BOOST_CHECK_EQUAL(*proxy, 5);
+}
+
+BOOST_AUTO_TEST_CASE(resize)
+{
+	constexpr auto COUNT = 500;
+	std::vector<decltype(acquire())> proxies;
+	std::vector<int> expected;
+	for (auto n = 0; n < COUNT; n++) {
+		proxies.push_back(acquire(n));
+		expected.emplace_back(n);
+	}
+	BOOST_CHECK_EQUAL_COLLECTIONS(expected.begin(), expected.end(), data.begin(), data.begin() + COUNT);
+	BOOST_CHECK_EQUAL_COLLECTIONS(expected.begin(), expected.end(), proxies.begin(), proxies.end());
+}
+
+BOOST_AUTO_TEST_SUITE_END()
-- 
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