added tests

tests/Std140BufferTests.cpp

@@ -55,12 +55,42 @@ void TestVectorAlignment()
 	Expect(ReadFloat(buffer, 16) == 4.0f, "vec4 x value is aligned");
 	Expect(ReadFloat(buffer, 28) == 7.0f, "vec4 w value is written");
 }
+
+void TestGlobalParamStylePacking()
+{
+	std::vector<unsigned char> buffer;
+	AppendStd140Float(buffer, 10.0f);				// time
+	AppendStd140Vec2(buffer, 1920.0f, 1080.0f);		// input resolution
+	AppendStd140Vec2(buffer, 1280.0f, 720.0f);		// output resolution
+	AppendStd140Float(buffer, 42.0f);				// frame count
+	AppendStd140Float(buffer, 0.5f);				// mix
+	AppendStd140Float(buffer, 1.0f);				// bypass
+	AppendStd140Int(buffer, 3);						// source history length
+	AppendStd140Int(buffer, 2);						// temporal history length
+	AppendStd140Float(buffer, 0.25f);				// float parameter
+	AppendStd140Vec2(buffer, 4.0f, 5.0f);			// vec2 parameter
+	AppendStd140Vec4(buffer, 0.1f, 0.2f, 0.3f, 1.0f); // color parameter
+	AppendStd140Int(buffer, 1);						// boolean parameter
+	AppendStd140Int(buffer, 2);						// enum parameter
+	buffer.resize(AlignStd140(buffer.size(), 16), 0);
+
+	Expect(buffer.size() == 96, "global parameter style block is padded to a 16-byte boundary");
+	Expect(ReadFloat(buffer, 0) == 10.0f, "time is at the start of the block");
+	Expect(ReadFloat(buffer, 8) == 1920.0f, "first vec2 aligns after scalar padding");
+	Expect(ReadFloat(buffer, 16) == 1280.0f, "second vec2 follows first vec2");
+	Expect(ReadInt(buffer, 36) == 3, "history length scalar remains tightly packed");
+	Expect(ReadFloat(buffer, 48) == 4.0f, "vec2 shader parameter aligns to 8 bytes");
+	Expect(ReadFloat(buffer, 64) == 0.1f, "color parameter aligns to 16 bytes");
+	Expect(ReadInt(buffer, 80) == 1, "boolean parameter follows vec4");
+	Expect(ReadInt(buffer, 84) == 2, "enum parameter follows boolean");
+}
 }
 
 int main()
 {
 	TestScalarPacking();
 	TestVectorAlignment();
+	TestGlobalParamStylePacking();
 
 	if (gFailures != 0)
 	{